Audio signal reproducing method and output control method

Abstract

To provide a technique for transmitting or receiving advanced digital broadcasting service more preferably.SOLUTION: An audio signal reproducing method in a receiver for receiving a broadcast wave including an audio signal representing sound source position information in polar coordinate includes: a reception step for receiving the broadcast wave; and an audio signal output step for outputting an audio signal to a plurality of speakers arranged so as to cylindrically form a plurality of layers outside the receiver. The output of the audio signal in the audio signal output step is performed by setting a triangular mesh having vertices with the plurality of speakers, by calculating a signal distribution coefficient for distributing the audio signal included in the broadcast wave received in the reception step based on the triangular mesh to the plurality of speakers, and by outputting an audio signal generated based on the signal distribution coefficient to the plurality of speakers.SELECTED DRAWING: Figure 2A

Description

Technical Field

[0001] The present invention relates to a method for reproducing an audio signal and a method for output control.

Background Art

[0002] Instead of conventional analog broadcast services, digital broadcast services have been started in various countries since the late 1990s. Digital broadcast services have realized improvements in broadcast quality using error correction techniques, multi-channeling and HD (High Definition) using compression encoding techniques, multimedia of services using BML (Broadcast Markup Language) and HTML5 (Hyper Text Markup Language version 5), and the like.

[0003] In recent years, for the purpose of further improving frequency use efficiency, higher resolution, and higher functionality, advanced digital broadcast systems have been studied in various countries.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Since more than 10 years have passed since the start of the current digital broadcast service, broadcast receiving apparatuses capable of receiving the current digital broadcast service have been sufficiently popularized. Therefore, when starting the advanced digital broadcast service currently under consideration, it is necessary to consider compatibility with the current digital broadcast service. That is, it is preferable to realize UHD (Ultra High Definition) of video signals while maintaining the viewing environment of the current digital broadcast service.

[0006] As a technology for realizing UHD broadcasting in a digital broadcasting service, there is a system described in Patent Document 1. However, the system described in Patent Document 1 is for replacing the current digital broadcasting and does not consider maintaining the viewing environment of the current digital broadcasting service.

[0007] An object of the present invention is to provide a technology for more preferably transmitting or receiving a higher-functional advanced digital broadcasting service in consideration of compatibility with the current digital broadcasting service.

Means for Solving the Problem

[0008] As means for solving the above problems, the technology described in the claims is used.

[0009] For example, in a method for reproducing an audio signal in a receiving device that receives a broadcast wave including an audio signal in which the position information of a sound source is indicated in polar coordinates, a receiving step of receiving the broadcast wave, and an audio output step of outputting the audio signal to a plurality of speakers arranged so as to form a plurality of cylindrical layers outside the receiving device are provided. The output of the audio signal in the audio output step sets a triangular mesh having the plurality of speakers as vertices, calculates a signal distribution coefficient for distributing the audio signal included in the broadcast wave received in the receiving step to the plurality of speakers based on the triangular mesh, and outputs the audio signal generated based on the signal distribution coefficient to the plurality of speakers. A method for reproducing an audio signal may be used.

Effects of the Invention

[0010] According to the present invention, it is possible to provide a technology for more preferably transmitting or receiving an advanced digital broadcasting service.

Brief Description of the Drawings

[0011]

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Embodiments for Carrying Out the Invention

[0012] Hereinafter, examples of embodiments of the present invention will be described with reference to the drawings.

[0013] (Example 1) [System Configuration] FIG. 1 is a system configuration diagram showing an example of the configuration of a broadcast system.

[0014] The broadcast system is composed of, for example, a broadcast receiving apparatus 100, an antenna 200, a radio tower 300 of a broadcast station, a broadcast station server 400, a service provider server 500, a mobile phone communication server 600, a base station 600B of a mobile phone communication network, a portable information terminal 700, a broadband network 800 such as the Internet, and a router device 800R. Further, various server devices and communication devices may be further connected to the Internet 800.

[0015] The broadcast receiving apparatus 100 is a television receiver having a reception function for advanced digital broadcast services. The broadcast receiving apparatus 100 may further have a reception function for existing digital broadcast services. Further, it is possible to support a broadcast communication cooperation system that combines functions using a broadband network with digital broadcast services (existing digital broadcast services or advanced digital broadcast services), such as obtaining additional content via the broadband network, performing arithmetic processing in a server device, and presentation processing by cooperation with a portable terminal device, in combination with the digital broadcast services. The broadcast receiving apparatus 100 receives a digital broadcast wave transmitted from the radio tower 300 via the antenna 200. The digital broadcast wave may be directly transmitted from the radio tower 300 to the antenna 200, or may be transmitted via a broadcast satellite, a communication satellite, etc. whose illustration is omitted. The broadcast receiving apparatus 100 may receive a broadcast signal retransmitted by a cable television station via a cable line or the like. Also, the broadcast receiving apparatus 100 can be connected to the Internet 800 via the router device 800R, and can transmit and receive data by communicating with each server device on the Internet 800. The broadcast receiving apparatus 100 may be configured as a display device having a flat panel display with fixed pixels. Also, the broadcast receiving apparatus 100 may be configured as a projector that includes a display panel of a liquid crystal type or a digital mirror type and a projection optical system, and projects an image onto a surface such as a screen.

[0016] The router device 800R is connected to the Internet 800 by wireless communication or wired communication, and is connected to the broadcast receiving apparatus 100 by wired communication and to the portable information terminal 700 by wireless communication. Thereby, each server device on the Internet 800, the broadcast receiving apparatus 100, and the portable information terminal 700 can mutually transmit and receive data via the router device 800R. The router device 800R, the broadcast receiving apparatus 100, and the portable information terminal 700 constitute a LAN (Local Area Network). Note that the communication between the broadcast receiving apparatus 100 and the portable information terminal 700 may be directly performed by a method such as Bluetooth (registered trademark) or NFC (Near Field Communication) without going through the router device 800R.

[0017] The radio tower 300 is broadcast equipment of a broadcasting station, and transmits digital broadcast waves including various control information related to digital broadcast services and content data (such as video content and audio content) of broadcast programs. The broadcasting station also includes a broadcasting station server 400. The broadcasting station server 400 stores content data of broadcast programs and metadata such as program titles, program IDs, program outlines, performers, broadcast dates, etc. of each broadcast program. The broadcasting station server 400 provides the content data and metadata to service providers based on a contract. The provision of content data and metadata to service providers is performed through an API (Application Programming Interface) provided in the broadcasting station server 400.

[0018] The service provider server 500 is a server device prepared for a service provider to provide services through a broadcast communication cooperation system. The service provider server 500 stores, manages, distributes, etc. content data and metadata provided from the broadcasting station server 400, and content data and applications (operation programs and / or various data, etc.) produced for the broadcast communication cooperation system. It also has a function of searching for and providing a list of available applications in response to inquiries from a television receiver. Note that the storage, management, distribution, etc. of the content data and metadata, and the storage, management, distribution, etc. of the applications may be performed by different server devices. The broadcasting station and the service provider may be the same or different. Multiple service provider servers 500 may be prepared for different services. Also, the functions of the service provider server 500 may be provided by the broadcasting station server 400.

[0019] The mobile phone communication server 600 is connected to the Internet 800 and, on the other hand, is connected to the mobile information terminal 700 via the base station 600B. The mobile phone communication server 600 manages telephone communication (call) and data transmission / reception via the mobile phone communication network of the mobile information terminal 700, and enables data transmission / reception by communication between the mobile information terminal 700 and each server device on the Internet 800. Note that the communication between the mobile information terminal 700 and the broadcast receiving device 100 may be performed via the base station 600B, the mobile phone communication server 600, the Internet 800, and the router device 800R.

[0020] [Hardware Configuration of Broadcast Receiving Device] FIG. 2A is a block diagram showing an example of the internal configuration of the broadcast receiving device 100. The broadcast receiving device 100 includes a main control unit 101, a system bus 102, a ROM 103, a RAM 104, a storage (accumulation) unit 110, a LAN communication unit 121, an expansion interface unit 124, a digital interface unit 125, a first tuner / demodulator unit 130C, a second tuner / demodulator unit 130T, a third tuner / demodulator unit 130L, a fourth tuner / demodulator unit 130B, a first decoder unit 140S, a second decoder unit 140U, an operation input unit 180, a video selection unit 191, a monitor unit 192, a video output unit 193, a voice selection unit 194, a speaker unit 195, and a voice output unit 196.

[0021] The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving device 100 according to a predetermined operation program. The system bus 102 is a communication path for transmitting and receiving various data, commands, etc. between the main control unit 101 and each operation block in the broadcast receiving device 100.

[0022] The ROM (Read Only Memory) 103 is a non-volatile memory in which basic operation programs such as an operating system and other operation programs are stored, and a rewritable ROM such as an EEPROM (Electrically Erasable Programmable ROM) or a flash ROM is used. Also, operation setting values and the like necessary for the operation of the broadcast receiving apparatus 100 are stored in the ROM 103. The RAM (Random Access Memory) 104 serves as a work area when executing basic operation programs and other operation programs. The ROM 103 and the RAM 104 may be integrally configured with the main control unit 101. Also, the ROM 103 may use a partial storage area within the storage (accumulation) unit 110 instead of having an independent configuration as shown in FIG. 2A.

[0023] The storage (accumulation) unit 110 stores operation programs, operation setting values, personal information of users of the broadcast receiving apparatus 100, and the like of the broadcast receiving apparatus 100. Also, it can store operation programs downloaded via the Internet 800 and various data created by the operation programs. Also, it can store contents such as videos, still images, and audio obtained from a broadcast wave or downloaded via the Internet 800. A partial area of the storage (accumulation) unit 110 may substitute for all or part of the functions of the ROM 103. Also, the storage (accumulation) unit 110 needs to retain the stored information even when no external power is supplied to the broadcast receiving apparatus 100. Therefore, for example, semiconductor element memories such as flash ROMs and SSDs (Solid State Drives), magnetic disk drives such as HDDs (Hard Disc Drives), and the like are used.

[0024] Note that the respective operation programs stored in the ROM 103 and the storage (accumulation) unit 110 can be added, updated, and functionally expanded by download processing from each server apparatus on the Internet 800 or from a broadcast wave.

[0025] The LAN communication unit 121 is connected to the Internet 800 via a router device 800R and transmits and receives data with each server device and other communication devices on the Internet 800. It also acquires content data (or a part thereof) of a program transmitted via a communication line. The connection to the router device 800R may be a wired connection or a wireless connection such as Wi-Fi (registered trademark). The LAN communication unit 121 includes an encoding circuit, a decoding circuit, and the like. Further, the broadcast receiving device 100 may further include other communication units such as a Bluetooth (registered trademark) communication unit, an NFC communication unit, and an infrared communication unit. When the communication of the LAN communication unit 121 is performed by wire, it may be provided with hardware having a terminal conforming to an Ethernet standard such as 10BASE-T, 100BASE-TX, or 1000BASE-T, and communicate via this. When the communication of the LAN communication unit 121 is performed wirelessly, it may be configured as a wireless communication interface. The LAN communication unit 121 may function as an IP interface which is one of the high-speed digital interfaces of the broadcast receiving device 100. For example, it may be configured to output a packet stream including encoded digital video data and / or digital audio data of the content received by the broadcast receiving device 100 as an IP interface output. When outputting copy-restricted content to an external device as an IP interface output via the LAN communication unit 121, protection processing is performed and output in accordance with various DTCP specifications such as the DTCP (Digital Transmission Content Protection) specification and the DTCP2 specification.

[0026] The first tuner / demodulator unit 130C, the second tuner / demodulator unit 130T, the third tuner / demodulator unit 130L, and the fourth tuner / demodulator unit 130B each receive broadcast waves of digital broadcast services and perform channel selection processing (channel selection) by tuning to a channel of a predetermined service based on the control of the main control unit 101. Further, it performs demodulation processing of the modulated wave of the received signal, waveform shaping processing, etc., as well as reconfiguration processing of the frame structure and hierarchical structure, energy despreading processing, error correction decoding processing, etc., to reproduce the packet stream. Also, it extracts and decodes the transmission TMCC (Transmission Multiplexing Configuration Control) signal from the received signal.

[0027] Note that the first tuner / demodulator unit 130C can receive the digital broadcast waves of the current terrestrial digital broadcast service received by the antenna 200C, which is an antenna for receiving current terrestrial digital broadcasts. Also, the first tuner / demodulator unit 130C can input a broadcast signal of one of the horizontal (H) polarization signal and the vertical (V) polarization signal of the polarization - dual terrestrial digital broadcast described later and demodulate a segment of a layer that adopts the same modulation method as the current terrestrial digital broadcast service. Also, the first tuner / demodulator unit 130C can input the broadcast signal of the single - polarization terrestrial digital broadcast described later and demodulate a segment of a layer that adopts the same modulation method as the current terrestrial digital broadcast service. Also, the first tuner / demodulator unit 130C can input the broadcast signal of the hierarchical - division multiplex terrestrial digital broadcast described later and demodulate a segment of a layer that adopts the same modulation method as the current terrestrial digital broadcast service.

[0028] The second tuner / demodulator unit 130T inputs the digital broadcast wave of the advanced terrestrial digital broadcast service received by the antenna 200T, which is an antenna for receiving both polarization terrestrial digital broadcasts, via the conversion unit 201T. Also, the second tuner / demodulator unit 130T may input the digital broadcast wave of the advanced terrestrial digital broadcast service received by a single-polarization terrestrial digital broadcast reception antenna (not shown). When the second tuner / demodulator unit 130T inputs the digital broadcast wave of the advanced terrestrial digital broadcast service from a single-polarization terrestrial digital broadcast reception antenna (not shown), the conversion unit 201T may not be involved. Note that the antenna 200T for receiving the digital broadcast wave of both polarization terrestrial digital broadcasts includes an element for receiving a horizontal polarization signal and an element for receiving a vertical polarization signal. The single-polarization terrestrial digital broadcast reception antenna (not shown) includes either an element for receiving a horizontal polarization signal or an element for receiving a vertical polarization signal. The single-polarization terrestrial digital broadcast reception antenna (not shown) may be shared with the antenna 200C, which is an antenna for receiving the current terrestrial digital broadcasts.

[0029] The third tuner / demodulator unit 130L inputs the digital broadcast wave of the advanced terrestrial digital broadcast service received by the antenna 200L, which is an antenna for receiving hierarchical division multiplex terrestrial digital broadcasts, via the conversion unit 201L.

[0030] The fourth tuner / demodulator unit 130B inputs the digital broadcast wave of the advanced BS (Broadcasting Satellite) digital broadcast service or the advanced CS (Communication Satellite) digital broadcast service received by the antenna 200B, which is a BS / CS shared reception antenna, via the conversion unit 201B. Note that the expression "tuner / demodulator unit" means a component having a tuner function and a demodulator function.

[0031] Also, the antenna 200C, the antenna 200T, the antenna 200L, the antenna 200B, the conversion unit 201T, the conversion unit 201L, and the conversion unit 201B do not constitute a part of the broadcast receiving apparatus 100, but belong to the equipment side of a building or the like where the broadcast receiving apparatus 100 is installed.

[0032] In addition, the above-mentioned current terrestrial digital broadcast is a broadcast signal of a terrestrial digital broadcast service that transmits video with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically.

[0033] In addition, the details of the dual-polarization terrestrial digital broadcast (advanced terrestrial digital broadcast adopting the dual-polarization transmission method) and the single-polarization terrestrial digital broadcast (advanced terrestrial digital broadcast adopting the single-polarization transmission method) will be described later. It is a broadcast signal of a terrestrial digital broadcast service that can transmit video with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically. The dual-polarization terrestrial digital broadcast is a terrestrial digital broadcast that uses a plurality of polarizations, namely horizontal (H) polarization and vertical (V) polarization. In both polarizations of the plurality of polarizations, in a part of the segmented segments, it transmits a terrestrial digital broadcast service that can transmit video with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically. The single-polarization terrestrial digital broadcast is a terrestrial digital broadcast that uses either the horizontal (H) polarization or the vertical (V) polarization, and in a part of the segmented segments, it transmits a terrestrial digital broadcast service that can transmit video with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically.

[0034] In the description of each embodiment of the present invention, when the expression "a plurality of polarization waves" is used for dual-polarization terrestrial digital broadcasting, unless otherwise specified, it means two polarization waves, namely, horizontal (H) polarization wave and vertical (V) polarization wave. Also, even when simply using the expression "polarization wave", it means "polarization wave signal". Further, in one or both of the plurality of polarization waves, in a divided partial segment, the above-described current terrestrial digital broadcasting that transmits video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels can be transmitted by the same modulation method. That is, in dual-polarization terrestrial digital broadcasting, in different segments of the plurality of polarization waves of each embodiment of the present invention, the current terrestrial digital broadcasting service that transmits video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels and the terrestrial digital broadcasting service that can transmit video with a maximum resolution of a pixel number exceeding horizontal 1920 pixels × vertical 1080 pixels can be transmitted simultaneously. Also, single-polarization terrestrial digital broadcasting can transmit the above-described current terrestrial digital broadcasting that transmits video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels in a divided partial segment by the same modulation method. That is, in single-polarization terrestrial digital broadcasting, in different segments of each embodiment of the present invention, the current terrestrial digital broadcasting service that transmits video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels and the terrestrial digital broadcasting service that can transmit video with a maximum resolution of a pixel number exceeding horizontal 1920 pixels × vertical 1080 pixels can be transmitted simultaneously.

[0035] Also, although the details of hierarchical division multiplex terrestrial digital broadcasting (advanced terrestrial digital broadcasting adopting the hierarchical division multiplex transmission method) will be described later, it is a broadcast signal of a terrestrial digital broadcasting service capable of transmitting video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels. Hierarchical division multiplex terrestrial digital broadcasting multiplexes a plurality of digital broadcasting signals with different signal levels. Note that the digital broadcasting signals with different signal levels mean that the transmission power of the digital broadcasting signals is different. The hierarchical division multiplex terrestrial digital broadcasting of each embodiment of the present invention uses, as the plurality of digital broadcasting signals with different signal levels, the broadcast signal of the current terrestrial digital broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels and the broadcast signal of a terrestrial digital broadcasting service capable of transmitting video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels, and can be transmitted by hierarchical multiplexing in the frequency band of the same physical channel. That is, in the hierarchical division multiplex terrestrial digital broadcasting of each embodiment of the present invention, in a plurality of layers with different signal levels, the current terrestrial digital broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels and a terrestrial digital broadcasting service capable of transmitting video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels can be transmitted simultaneously.

[0036] Note that the broadcast receiving apparatus in each embodiment of the present invention only needs to be configured to be able to preferably receive advanced digital broadcasting, and it is not essential to include all of the first tuner / demodulator unit 130C, the second tuner / demodulator unit 130T, the third tuner / demodulator unit 130L, and the fourth tuner / demodulator unit 130B. For example, it is sufficient to include at least one of the second tuner / demodulator unit 130T or the third tuner / demodulator unit 130L. Also, in order to realize more advanced functions, in addition to one of the second tuner / demodulator unit 130T or the third tuner / demodulator unit 130L, one or more of the above four tuner / demodulator units may be provided together.

[0037] Also, the antenna 200C, the antenna 200T, and the antenna 200L may be used interchangeably as appropriate. Also, among the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, and the third tuner / demodulation unit 130L, a plurality of tuner / demodulation units may be used interchangeably (or integrated) as appropriate.

[0038] The first decoder unit 140S and the second decoder unit 140U each input a packet stream output from the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, the third tuner / demodulation unit 130L, or the fourth tuner / demodulation unit 130B, or a packet stream acquired from each server device on the Internet 800 via the LAN communication unit 121. The packet streams input by the first decoder unit 140S and the second decoder unit 140U may be packet streams in formats such as MPEG (Moving Picture Experts Group)-2 TS (Transport Stream), MPEG-2 PS (Program Stream), TLV (Type Length Value), MMT (MPEG Media Transport), and the like.

[0039] The first decoder unit 140S and the second decoder unit 140U each perform conditional access (CA) processing, multiplex separation processing for separating and extracting video data, audio data, various information data, etc. from the packet stream based on various control information included in the packet stream, decoding processing of video data and audio data, acquisition of program information and EPG (Electronic Program Guide) generation processing, reproduction processing of data broadcast screens and multimedia data, and the like. Also, a process of superimposing the generated EPG and the reproduced multimedia data on the decoded video data and audio data is performed.

[0040] The video selection unit 191 receives the video data output from the first decoder unit 140S and the video data output from the second decoder unit 140U, and performs processes such as appropriate selection and / or superimposition based on the control of the main control unit 101. Further, the video selection unit 191 appropriately performs scaling processing, superimposition processing of OSD (On Screen Display) data, and the like. The monitor unit 192 is a display device such as a liquid crystal panel, for example, and displays the video data selected and / or superimposed by the video selection unit 191 to provide it to the user of the broadcast receiving apparatus 100. The video output unit 193 is a video output interface that outputs the video data selected and / or superimposed by the video selection unit 191 to the outside. The video output unit 193 may be a video output interface via an HDMI (High-Definition Multimedia Interface) terminal. Alternatively, it may be a video output interface that outputs video to the outside by wireless communication. When outputting the video of content with copy restrictions from the video output unit 193, protection processing is performed and output in accordance with the HDCP (High-Bandwidth Digital Content Protection) specification.

[0041] The audio selection unit 194 receives the audio data output from the first decoder unit 140S and the audio data output from the second decoder unit 140U, and performs processes such as appropriate selection and / or mixing based on the control of the main control unit 101. The speaker unit 195 outputs the audio data selected and / or mixed by the audio selection unit 194 to provide it to the user of the broadcast receiving apparatus 100. The audio output unit 196 is an audio output interface that outputs the audio data selected and / or mixed by the audio selection unit 194 to the outside. The audio output unit 196 may be an audio output interface via an HDMI terminal. Alternatively, it may be an audio output interface that outputs audio to the outside by wireless communication. When outputting the audio of content with copy restrictions from the audio output unit 196, protection processing is performed and output in accordance with the HDCP specification.

[0042] Note that the video output unit 193 and the audio output unit 196 may be integrated to form a video and audio output interface via an HDMI terminal.

[0043] The digital interface unit 125 is an interface that outputs or inputs a packet stream including encoded digital video data and / or digital audio data. The digital interface unit 125 can directly output the packet stream input from the first tuner / demodulator unit 130C, the second tuner / demodulator unit 130T, the third tuner / demodulator unit 130L, or the fourth tuner / demodulator unit 130B by the first decoder unit 140S or the second decoder unit 140U. Also, the packet stream input from the outside via the digital interface unit 125 may be input to the first decoder unit 140S or the second decoder unit 140U, or may be controlled to be stored in the storage unit 110. Alternatively, the video data or audio data separated and extracted by the first decoder unit 140S or the second decoder unit 140U may be output. Also, the video data or audio data input from the outside via the digital interface unit 125 may be input to the first decoder unit 140S or the second decoder unit 140U, or may be controlled to be stored in the storage unit 110. Note that, as an example of the digital interface unit 125, an output interface that outputs as an HDMI Ethernet Channel via an HDMI terminal may be used. When outputting copy-restricted content to an external device as an IP interface output via the digital interface unit 125, protection processing is performed in accordance with various DTCP specifications such as the DTCP (Digital Transmission Content Protection) specification and the DTCP2 specification before output.

[0044] The expansion interface unit 124 is a group of interfaces for expanding the functions of the broadcast receiving apparatus 100, and is composed of an analog video / audio interface, a USB (Universal Serial Bus) interface, a memory interface, etc. The analog video / audio interface performs input of analog video signals / audio signals from an external video / audio output device, output of analog video signals / audio signals to an external video / audio input device, and the like. The USB interface connects to a PC or the like to transmit and receive data. An HDD may be connected to record broadcast programs and other content data. Also, a keyboard or other USB devices may be connected. The memory interface connects a memory card or other memory medium to transmit and receive data.

[0045] The operation input unit 180 is an instruction input unit for inputting operation instructions to the broadcast receiving apparatus 100, and is composed of a remote control receiving unit that receives commands transmitted from a remote control (remote controller) (not shown in the figure) and operation keys arranged with button switches. Only one of them may be used. Also, the operation input unit 180 can be replaced with a touch panel or the like arranged over the monitor unit 192. It may also be replaced with a keyboard or the like connected to the expansion interface unit 124. The remote control can be replaced with a portable information terminal 700 having a remote control command transmission function. Note that the "keys" provided on the remote control described in the following embodiments can all be expressed as "buttons" without any problem.

[0046] In addition, when the broadcast receiving apparatus 100 is a television receiver or the like, the video output unit 193 and the audio output unit 196 are not essential components. Further, the broadcast receiving apparatus 100 may be an optical disk drive recorder such as a DVD (Digital Versatile Disc) recorder, a magnetic disk drive recorder such as an HDD recorder, an STB (Set Top Box), or the like. It may also be a PC (Personal Computer), a tablet terminal, or the like having a reception function for digital broadcast services. When the broadcast receiving apparatus 100 is a DVD recorder, an HDD recorder, an STB, or the like, the monitor unit 192 and the speaker unit 195 are not essential components. By connecting an external monitor and an external speaker to the video output unit 193 and the audio output unit 196 or the digital interface unit 125, the same operations as those of a television receiver or the like become possible. FIG. 2B is a block diagram showing an example of the detailed configuration of the first tuner / demodulation unit 130C.

[0047] The channel selection / detection unit 131C inputs the current digital broadcast wave received by the antenna 200C and performs channel selection based on a channel selection control signal. The TMCC demodulation unit 132C extracts the TMCC signal from the output signal of the channel selection / detection unit 131C and acquires various TMCC information. The acquired TMCC information is used for the control of each subsequent process. Details of the TMCC signal and the TMCC information will be described later.

[0048] The demodulation unit 133C inputs a modulated wave modulated by a method such as QPSK (Quadrature Phase Shift Keying), DQPSK (Differential QPSK), 16QAM (Quadrature Amplitude Modulation), 64QAM, or the like based on the TMCC information and the like, and performs a demodulation process including frequency deinterleaving, time deinterleaving, carrier demapping processing, and the like. The demodulation unit 133C may be further capable of corresponding to a modulation method different from the above-described modulation methods.

[0049] The stream playback unit 134C performs hierarchical division processing, inner code error correction processing such as Viterbi decoding, energy inverse spreading processing, stream playback processing, outer code error correction processing such as RS (Reed Solomon) decoding, and the like. Note that, as the error correction processing, a method different from the above-described methods may be used. Further, the packet stream reproduced and output by the stream playback unit 134C is, for example, MPEG-2 TS or the like. A packet stream in other formats may also be used.

[0050] FIG. 2C is a block diagram showing an example of the detailed configuration of the second tuner / demodulator unit 130T.

[0051] The channel selection / detection unit 131H inputs the horizontal (H) polarization signal of the digital broadcast wave received by the antenna 200T and performs channel selection based on the channel selection control signal. The channel selection / detection unit 131V inputs the vertical (V) polarization signal of the digital broadcast wave received by the antenna 200T and performs channel selection based on the channel selection control signal. Note that the operation of the channel selection process in the channel selection / detection unit 131H and the operation of the channel selection process in the channel selection / detection unit 131V may be controlled in conjunction with each other, or may be controlled independently. That is, it is also possible to control the channel selection / detection unit 131H and the channel selection / detection unit 131V as one channel selection / detection unit so as to select one channel of the digital broadcast service transmitted using both horizontal and vertical polarizations. It is also possible to control the channel selection / detection unit 131H and the channel selection / detection unit 131V as two independent channel selection / detection units so as to select two different channels of the digital broadcast service transmitted using only the horizontal polarization (or only the vertical polarization), respectively.

[0052] Note that the horizontal (H) polarization signal and the vertical (V) polarization signal received by the second tuner / demodulator unit 130T of the broadcast receiving apparatus in each embodiment of the present invention may be polarization signals based on broadcast waves having polarization directions that are approximately 90 degrees different from each other, and the configurations related to the horizontal (H) polarization signal, the vertical (V) polarization signal, and their reception described below may be reversed.

[0053] The TMCC decoder 132H extracts the TMCC signal from the output signal of the station selection / detection unit 131H and acquires various TMCC information. The TMCC decoder 132V extracts the TMCC signal from the output signal of the station selection / detection unit 131V and acquires various TMCC information. Only one of the TMCC decoder 132H and the TMCC decoder 132V may be used. The acquired TMCC information is used for the control of each subsequent process.

[0054] The demodulation units 133H and 133V respectively input modulated waves modulated using methods such as BPSK (Binary Phase Shift Keying), DBPSK (Differential BPSK), QPSK, DQPSK, 8PSK (Phase Shift Keying), 16APSK (Amplitude and Phase Shift Keying), 32APSK, 16QAM, 64QAM, 256QAM, 1024QAM, etc. based on TMCC information and the like, and perform demodulation processing including frequency deinterleaving, time deinterleaving, carrier demapping processing, etc. The demodulation units 133H and 133V may be further compatible with modulation methods different from the above-mentioned respective modulation methods.

[0055] The stream playback units 134H and 134V respectively perform hierarchical division processing, inner code error correction processing such as Viterbi decoding and LDPC (Low Density Parity Check) decoding, energy despreading processing, stream playback processing, outer code error correction processing such as RS decoding and BCH decoding, etc. Note that as the error correction processing, those different from the above-mentioned respective methods may be used. Also, the packet stream reproduced and output by the stream playback unit 134H is, for example, MPEG-2 TS or the like. The packet stream reproduced and output by the stream playback unit 134V is, for example, TLV including MPEG-2 TS and MMT packet streams. Each may be a packet stream of other formats.

[0056] In addition, when the second tuner / demodulation unit 130T inputs a digital broadcast wave of single-polarization terrestrial digital broadcast, the channel selection / detection unit 131V, the TMCC decoding unit 132V, and the demodulation unit 133V may not be provided. Also, when the current terrestrial digital broadcast service and the advanced terrestrial digital broadcast service are transmitted simultaneously in different segments, among the signals output from the demodulation unit 133H, the signals of the segments transmitting the current terrestrial digital broadcast service are input to the stream playback unit 134H, and the signals of the segments transmitting the advanced terrestrial digital broadcast service are input to the stream playback unit 134V.

[0057] FIG. 2D is a block diagram showing an example of the detailed configuration of the third tuner / demodulation unit 130L.

[0058] The channel selection / detection unit 131L inputs a digital broadcast wave subjected to layered division multiplexing (LDM) processing from the antenna 200L and performs channel selection based on a channel selection control signal. The digital broadcast wave subjected to layered division multiplexing processing may be used for transmitting different digital broadcast services (or different channels of the same broadcast service) with modulation waves of the upper layer (UL) and the lower layer (LL) being different. Also, the modulation wave of the upper layer is output to the demodulation unit 133S, and the modulation wave of the lower layer is output to the demodulation unit 133L, respectively.

[0059] The TMCC decoding unit 132L inputs the modulation waves of the upper layer and the lower layer output from the channel selection / detection unit 131L, extracts the TMCC signal, and acquires various TMCC information. The signal input to the TMCC decoding unit 132L may be only one of the modulation waves of the upper layer and the lower layer.

[0060] Since the demodulation units 133S and 133L perform the same operations as the demodulation units 133H and 133V, detailed descriptions thereof are omitted. Also, since the stream playback units 134S and 134L perform the same operations as the stream playback units 134H and 134V, respectively, detailed descriptions thereof are omitted. FIG. 2E is a block diagram showing an example of the detailed configuration of the fourth tuner / demodulator section 130B.

[0061] The channel selection / detection section 131B inputs the digital broadcast waves of the advanced BS digital broadcast service and the advanced CS digital broadcast service received by the antenna 200B, and performs channel selection based on the channel selection control signal. Since the other operations are the same as those of the channel selection / detection section 131H and the channel selection / detection section 131V, detailed description thereof will be omitted. Also, since the TMCC decoder section 132B, the demodulator section 133B, and the stream reproduction section 134B perform the same operations as the TMCC decoder section 132H, the TMCC decoder section 132V, the demodulator section 133H, the demodulator section 133V, and the stream reproduction section 134V, respectively, detailed description thereof will be omitted.

[0062] FIG. 2F is a block diagram showing an example of the detailed configuration of the first decoder section 140S.

[0063] The selection section 141S selects and outputs one from the packet streams input from the first tuner / demodulator section 130C, the packet stream input from the second tuner / demodulator section 130T, and the packet stream input from the third tuner / demodulator section 130L based on the control of the main control section 101. The packet streams input from the first tuner / demodulator section 130C, the second tuner / demodulator section 130T, and the third tuner / demodulator section 130L are, for example, MPEG-2 TS or the like. The CA descrambler 142S performs a process of releasing the encryption algorithm of a predetermined scrambling method based on various control information related to conditional access superimposed on the packet stream.

[0064] The multiplex separation unit 143S is a stream decoder that separates and extracts video data, audio data, character super data, subtitle data, program information data, etc. based on various control information contained in the input packet stream. The separated and extracted video data is distributed to the video decoder 145S, the separated and extracted audio data is distributed to the audio decoder 146S, and the separated and extracted character super data, subtitle data, program information data, etc. are distributed to the data decoder 144S. A packet stream (e.g., MPEG-2 PS, etc.) acquired from a server device on the Internet 800 via the LAN communication unit 121 may be input to the multiplex separation unit 143S. Also, the multiplex separation unit 143S can output the packet stream input from the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, or the third tuner / demodulation unit 130L to the outside via the digital interface unit 125, and can input a packet stream acquired from the outside via the digital interface unit 125.

[0065] The video decoder 145S performs decoding processing of video information subjected to compression encoding, colorimetry conversion processing, dynamic range conversion processing, etc. on the video data input from the multiplex separation unit 143S. Also, it performs processing such as resolution conversion (up / down conversion) based on the control of the main control unit 101, and outputs the video data at an appropriate resolution such as UHD (3840 horizontal pixels × 2160 vertical pixels), HD (1920 horizontal pixels × 1080 vertical pixels), SD (720 horizontal pixels × 480 vertical pixels), etc. Video data output at other resolutions may also be performed. The audio decoder 146S performs decoding processing of audio information subjected to compression encoding, etc. Also, it performs downmix processing, etc. based on the control of the main control unit 101, and outputs the audio data with the number of channels such as 22.2ch, 7.1ch, 5.1ch, 2ch, etc. Note that multiple video decoders 145S and audio decoders 146S may be provided in order to perform decoding processing of video data and audio data, etc. simultaneously.

[0066] The data decoder 144S performs processes such as generating an EPG based on program information data, generating a data broadcast screen based on BML data, and controlling a cooperation application based on a broadcast communication cooperation function. The data decoder 144S has a BML browser function for executing a BML document, and the data broadcast screen generation process is executed by the BML browser function. Further, the data decoder 144S performs processes such as decoding character super data to generate character super information and decoding subtitle data to generate subtitle information.

[0067] The superimposing unit 147S, the superimposing unit 148S, and the superimposing unit 149S respectively perform superimposing processes on the video data output from the video decoder 145S and the EPG, data broadcast screen, etc. output from the data decoder 144S. The synthesizing unit 151S performs a process of synthesizing the audio data output from the audio decoder 146S and the audio data reproduced by the data decoder 144S. The selection unit 150S selects the resolution of the video data based on the control of the main control unit 101. Note that the functions of the superimposing unit 147S, the superimposing unit 148S, the superimposing unit 149S, and the selection unit 150S may be integrated with the video selection unit 191. The function of the synthesizing unit 151S may be integrated with the audio selection unit 194.

[0068] FIG. 2G is a block diagram showing an example of the detailed configuration of the second decoder unit 140U.

[0069] The selection unit 141U selects and outputs one from the packet streams input from the second tuner / demodulation unit 130T, the packet stream input from the third tuner / demodulation unit 130L, and the packet stream input from the fourth tuner / demodulation unit 130B based on the control of the main control unit 101. The packet streams input from the second tuner / demodulation unit 130T, the third tuner / demodulation unit 130L, and the fourth tuner / demodulation unit 130B are, for example, MMT packet streams or TLVs including MMT packet streams. It may also be a packet stream in the MPEG-2 TS format that adopts HEVC (High Efficiency Video Coding) or the like for the video compression method. The CA descrambler 142U performs the release process of the encryption algorithm of a predetermined scrambling method based on various control information regarding conditional reception superimposed on the packet stream.

[0070] The multiplex separation unit 143U is a stream decoder, and separates and extracts video data, audio data, character super data, subtitle data, program information data, etc. based on various control information included in the input packet stream. The separated and extracted video data is distributed to the video decoder 145U, the separated and extracted audio data is distributed to the audio decoder 146U, and the separated and extracted character super data, subtitle data, program information data, etc. are distributed to the multimedia decoder 144U. A packet stream (for example, MPEG-2 PS, MMT packet stream, etc.) acquired from a server device on the Internet 800 via the LAN communication unit 121 may be input to the multiplex separation unit 143U. Further, the multiplex separation unit 143U can output the packet stream input from the second tuner / demodulation unit 130T, the third tuner / demodulation unit 130L, and the fourth tuner / demodulation unit 130B to the outside via the digital interface unit 125, and can input a packet stream acquired from the outside via the digital interface unit 125.

[0071] The multimedia decoder 144U performs processes such as generating an EPG based on program information data, generating a multimedia screen based on multimedia data, and controlling a cooperation application based on a broadcast communication cooperation function. The multimedia decoder 144U has an HTML browser function for executing HTML documents, and the multimedia screen generation process is executed by the HTML browser function.

[0072] The video decoder 145U, the audio decoder 146U, the superimposing units 147U, 148U, and 149U, and the synthesizing unit 151U and the selecting unit 150U are components having the same functions as the video decoder 145S, the audio decoder 146S, the superimposing units 147S, 148S, and 149S, the synthesizing unit 151S, and the selecting unit 150S, respectively. For these, if the S at the end of the reference numerals in the description of the video decoder 145S, the audio decoder 146S, the superimposing units 147S, 148S, and 149S, the synthesizing unit 151S, and the selecting unit 150S in FIG. 2F is changed to U, it becomes the description of the video decoder 145U, the audio decoder 146U, the superimposing units 147U, 148U, and 149U, the synthesizing unit 151U, and the selecting unit 150U in FIG. 2G, so a separate detailed description is omitted.

[0073] [Software Configuration of Broadcast Receiver] FIG. 2H is a software configuration diagram of the broadcast receiver 100, showing an example of the software configuration in the storage (accumulation) unit 110 (or ROM 103, the same applies hereinafter) and the RAM 104. The storage (accumulation) unit 110 stores a basic operation program 1001, a reception function program 1002, a browser program 1003, a content management program 1004, and other operation programs 1009. Further, the storage (accumulation) unit 110 is assumed to include a content storage area 1011 for storing content data such as video, still images, and audio, an authentication information storage area 1012 for storing authentication information and the like used when communicating and cooperating with external portable terminal devices, server devices, etc., and various information storage areas 1019 for storing various other information.

[0074] The basic operation program 1001 stored in the storage (accumulation) unit 110 is expanded in the RAM 104, and further, the main control unit 101 executes the expanded basic operation program, thereby constituting the basic operation control unit 1101. Also, the reception function program 1002, the browser program 1003, and the content management program 1004 stored in the storage (accumulation) unit 110 are each expanded in the RAM 104, and further, the main control unit 101 executes each of the expanded operation programs, thereby constituting the reception function control unit 1102, the browser engine 1103, and the content management unit 1104. Also, the RAM 104 is provided with a temporary storage area 1200 that temporarily holds the data created when each operation program is executed, as necessary.

[0075] In the following, for the sake of simplicity of explanation, the process of controlling each operation block by the main control unit 101 expanding and executing the basic operation program 1001 stored in the storage (accumulation) unit 110 in the RAM 104 will be described as being performed by the basic operation control unit 1101 for controlling each operation block. The same description will be made for other operation programs.

[0076] The reception function control unit 1102 performs basic control of the broadcast reception function, broadcast communication cooperation function, etc. of the broadcast reception apparatus 100. In particular, the channel selection / demodulation unit 1102a mainly controls channel selection processing, TMCC information acquisition processing, demodulation processing, etc. in the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, the third tuner / demodulation unit 130L, the fourth tuner / demodulation unit 130B, etc. The stream playback control unit 1102b mainly controls hierarchical division processing, error correction decoding processing, energy despreading processing, stream playback processing, etc. in the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, the third tuner / demodulation unit 130L, the fourth tuner / demodulation unit 130B, etc. The AV decoding unit 1102c mainly controls multiplex separation processing (stream decoding processing), video data decoding processing, audio data decoding processing, etc. in the first decoder unit 140S, the second decoder unit 140U, etc. The multimedia (MM) data playback unit 1102d mainly controls BML data playback processing, character super data decoding processing, subtitle data decoding processing, control processing of communication cooperation applications, etc. in the first decoder unit 140S, HTML data playback processing, multimedia screen generation processing, control processing of communication cooperation applications, etc. in the second decoder unit 140U, etc. The EPG generation unit 1102e mainly controls EPG generation processing and display processing of the generated EPG in the first decoder unit 140S and the second decoder unit 140U. The presentation processing unit 1102f controls colorimetry conversion processing, dynamic range conversion processing, resolution conversion processing, audio downmix processing, etc. in the first decoder unit 140S and the second decoder unit 140U, and controls the video selection unit 191, the audio selection unit 194, etc.

[0077] The BML browser 1103a and the HTML browser 1103b of the browser engine 1103 interpret BML documents and HTML documents during the aforementioned BML data playback processing and HTML data playback processing, and perform data broadcast screen generation processing and multimedia screen generation processing.

[0078] The content management unit 1104 performs time schedule management and execution control when making recording reservations and viewing reservations for broadcast programs, and also performs copyright management and expiration date management of linked applications obtained based on the broadcast communication cooperation function when outputting broadcast programs, recorded programs, etc. from the digital interface unit 125, the LAN communication unit 121, etc.

[0079] Each of the above operation programs may be stored in advance in the storage (accumulation) unit 110 and / or the ROM 103 at the time of product shipment. It may also be obtained from a server device on the Internet 800 via the LAN communication unit 121, etc. after product shipment. Further, each of the above operation programs stored in a memory card, an optical disk, etc. may be obtained via the expansion interface unit 124, etc. It may also be newly obtained or updated via a broadcast wave.

[0080] [Configuration of Broadcast Station Server] Figure 3A shows an example of the internal configuration of the broadcast station server 400. The broadcast station server 400 is composed of a main control unit 401, a system bus 402, a RAM 404, a storage unit 410, a LAN communication unit 421, and a digital broadcast signal transmission unit 460.

[0081] The main control unit 401 is a microprocessor unit that controls the entire broadcast station server 400 according to a predetermined operation program. The system bus 402 is a communication path for transmitting and receiving various data, commands, etc. between the main control unit 401 and each operation block in the broadcast station server 400. The RAM 404 serves as a work area when each operation program is executed.

[0082] The storage unit 410 stores a basic operation program 4001, a content management / delivery program 4002, and a content transmission program 4003, and further includes a content data storage area 4011 and a metadata storage area 4012. The content data storage area 4011 stores content data, etc. of each broadcast program broadcast by the broadcast station. The metadata storage area 4012 stores metadata such as the program title, program ID, program summary, cast, broadcast date and time, etc. of each of the above broadcast programs.

[0083] Also, the basic operation program 4001, content management / delivery program 4002, and content transmission program 4003 stored in the storage unit 410 are each expanded in the RAM 404, and further, the main control unit 401 executes the expanded basic operation program, content management / delivery program, and content transmission program, thereby constituting a basic operation control unit 4101, a content management / delivery control unit 4102, and a content transmission control unit 4103.

[0084] Note that hereinafter, for the sake of simplicity of explanation, the process in which the main control unit 401 expands and executes the basic operation program 4001 stored in the storage unit 410 in the RAM 404 to control each operation block is described as if the basic operation control unit 4101 controls each operation block. The same description is made for other operation programs.

[0085] The content management / delivery control unit 4102 manages content data, metadata, etc. stored in the content data storage area 4011 and the metadata storage area 4012, and controls the provision of the content data, metadata, etc. to the service provider based on the contract. Further, when providing content data, metadata, etc. to the service provider, the content management / delivery control unit 4102 also performs authentication processing, etc. of the service provider server 500 as necessary.

[0086] The content transmission control unit 4103 performs time schedule management, etc. when transmitting a stream including content data of a broadcast program stored in the content data storage area 4011, program title, program ID, copy control information of program content, etc. stored in the metadata storage area 4012 via the digital broadcast signal transmission unit 460.

[0087] The LAN communication unit 421 is connected to the Internet 800 and communicates with the service provider server 500 on the Internet 800 and other communication devices. The LAN communication unit 421 includes an encoding circuit, a decoding circuit, and the like. The digital broadcast signal transmission unit 460 performs processing such as modulation on a stream composed of content data of each broadcast program, program information data, etc. stored in the content data storage area 4011, and transmits it as a digital broadcast wave via the radio tower 300.

[0088] [Configuration of Service Provider Server] Figure 3B shows an example of the internal configuration of the service provider server 500. The service provider server 500 is composed of a main control unit 501, a system bus 502, a RAM 504, and a storage unit 510, and a LAN communication unit 521.

[0089] The main control unit 501 is a microprocessor unit that controls the entire service provider server 500 according to a predetermined operation program. The system bus 502 is a communication path for transmitting and receiving various data, commands, etc. between the main control unit 501 and each operation block in the service provider server 500. The RAM 504 serves as a work area when each operation program is executed.

[0090] The storage unit 510 stores the basic operation program 5001, the content management / distribution program 5002, and the application management / distribution program 5003, and further includes a content data storage area 5011, a metadata storage area 5012, and an application storage area 5013. The content data storage area 5011 and the metadata storage area 5012 store content data, metadata, etc. provided by the broadcast station server 400, or content produced by the service provider and metadata related to the content. The application storage area 5013 stores applications (operation programs and / or various data, etc.) required for realizing each service of the broadcast communication cooperation system for distribution in response to requests from each television receiver.

[0091] Also, the basic operation program 5001, content management / delivery program 5002, and application management / distribution program 5003 stored in the storage unit 510 are each expanded in the RAM 504, and further, the main control unit 501 executes the expanded basic operation program, content management / delivery program, and application management / distribution program, thereby constituting a basic operation control unit 5101, a content management / delivery control unit 5102, and an application management / distribution control unit 5103.

[0092] Note that hereinafter, for the sake of simplicity of explanation, the process in which the main control unit 501 expands and executes the basic operation program 5001 stored in the storage unit 510 in the RAM 504 to control each operation block is described as if the basic operation control unit 5101 controls each operation block. The same description is made for other operation programs.

[0093] The content management / delivery control unit 5102 performs acquisition of content data, metadata, etc. from the broadcast station server 400, management of content data, metadata, etc. stored in the content data storage area 5011 and metadata storage area 5012, and control of distribution of the content data, metadata, etc. to each television receiver. Also, the application management / distribution control unit 5103 performs management of each application stored in the application storage area 5013 and control when distributing each application in response to requests from each television receiver. Further, when distributing each application to each television receiver, the application management / distribution control unit 5103 also performs authentication processing, etc. of the television receiver as necessary.

[0094] The LAN communication unit 521 is connected to the Internet 800 and communicates with the broadcast station server 400 and other communication devices on the Internet 800. It also communicates with the broadcast receiving device 100 and the portable information terminal 700 via the router device 800R. The LAN communication unit 521 includes a coding circuit, a decoding circuit, etc.

[0095] [Hardware Configuration of the Portable Information Terminal] FIG. 3C is a block diagram showing an example of the internal configuration of the portable information terminal 700. The portable information terminal 700 includes a main control unit 701, a system bus 702, a ROM 703, a RAM 704, a storage unit 710, a communication processing unit 720, an expansion interface unit 724, an operation unit 730, an image processing unit 740, an audio processing unit 750, and a sensor unit 760.

[0096] The main control unit 701 is a microprocessor unit that controls the entire portable information terminal 700 according to a predetermined operation program. The system bus 702 is a communication path for transmitting and receiving various data, commands, etc. between the main control unit 701 and each operation block in the portable information terminal 700.

[0097] The ROM 703 is a non-volatile memory in which basic operation programs such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM or a flash ROM is used. Also, operation setting values necessary for the operation of the portable information terminal 700 are stored in the ROM 703. The RAM 704 serves as a work area when the basic operation program and other operation programs are executed. The ROM 703 and the RAM 704 may be integrally configured with the main control unit 701. Also, the ROM 703 may not be configured independently as shown in FIG. 3C, and a part of the storage area in the storage unit 710 may be used.

[0098] The storage unit 710 stores the operation program and operation setting values of the mobile information terminal 700, personal information of the user of the mobile information terminal 700, and the like. Also, it can store operation programs downloaded via the Internet 800 and various data created by the operation programs. Further, it can store contents such as videos, still images, and audio downloaded via the Internet 800. A part of the storage unit 710 may replace all or part of the functions of the ROM 703. Also, the storage unit 710 needs to retain the stored information even when no external power is supplied to the mobile information terminal 700. Therefore, for example, semiconductor element memories such as flash ROMs and SSDs, magnetic disk drives such as HDDs, and the like are used.

[0099] Note that the respective operation programs stored in the ROM 703 and the storage unit 710 can be added, updated, and functionally extended by download processing from each server device on the Internet 800.

[0100] The communication processing unit 720 is composed of a LAN communication unit 721, a mobile phone network communication unit 722, and an NFC communication unit 723. The LAN communication unit 721 is connected to the Internet 800 via a router device 800R and transmits and receives data to and from each server device and other communication devices on the Internet 800. The connection to the router device 800R is made by wireless connection such as Wi-Fi (registered trademark). The mobile phone network communication unit 722 performs telephone communication (call) and data transmission and reception by wireless communication with a base station 600B of a mobile phone communication network. The NFC communication unit 723 performs wireless communication when in proximity to a corresponding reader / writer. The LAN communication unit 721, the mobile phone network communication unit 722, and the NFC communication unit 723 each include a coding circuit, a decoding circuit, an antenna, and the like. Also, the communication processing unit 720 may further include other communication units such as a Bluetooth (registered trademark) communication unit and an infrared communication unit.

[0101] The extended interface unit 724 is a group of interfaces for extending the functions of the portable information terminal 700. In this embodiment, it is assumed to be composed of a video / audio interface, a USB interface, a memory interface, etc. The video / audio interface performs operations such as input of video signals / audio signals from external video / audio output devices and output of video signals / audio signals to external video / audio input devices. The USB interface connects to a PC or the like to perform data transmission and reception. Also, a keyboard or other USB devices may be connected. The memory interface connects a memory card or other memory media to perform data transmission and reception.

[0102] The operation unit 730 is an instruction input unit for inputting operation instructions to the portable information terminal 700. In this embodiment, it is composed of a touch panel 730T arranged overlapping the display unit 741 and operation keys 730K arranged with button switches. Only one of them may be used. The operation of the portable information terminal 700 may be performed using a keyboard or the like connected to the extended interface unit 724. The operation of the portable information terminal 700 may be performed using a separate terminal device connected by wired communication or wireless communication. That is, the operation of the portable information terminal 700 may be performed from the broadcast receiving device 100. Also, the touch panel function may be provided by the display unit 741.

[0103] The image processing unit 740 is composed of a display unit 741, an image signal processing unit 742, a first image input unit 743, and a second image input unit 744. The display unit 741 is a display device such as a liquid crystal panel, and provides the image data processed by the image signal processing unit 742 to the user of the portable information terminal 700. The image signal processing unit 742 includes a video RAM (not shown), and drives the display unit 741 based on the image data input to the video RAM. Further, the image signal processing unit 742 has functions such as format conversion and superimposing processing of menus and other OSD (On Screen Display) signals as necessary. The first image input unit 743 and the second image input unit 744 are camera units that input image data of the surroundings or an object by converting the light input from a lens into an electrical signal using an electronic device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor.

[0104] The audio processing unit 750 is composed of an audio output unit 751, an audio signal processing unit 752, and an audio input unit 753. The audio output unit 751 is a speaker, and provides the audio signal processed by the audio signal processing unit 752 to the user of the portable information terminal 700. The audio input unit 753 is a microphone, and converts the user's voice etc. into audio data and inputs it.

[0105] The sensor unit 760 is a group of sensors for detecting the state of the portable information terminal 700. In this embodiment, it is composed of a GPS receiver 761, a gyro sensor 762, a geomagnetic sensor 763, an acceleration sensor 764, an illuminance sensor 765, and a proximity sensor 766. With these sensor groups, it becomes possible to detect the position, inclination, azimuth, movement of the portable information terminal 700, as well as the ambient brightness, proximity situation of surrounding objects, etc. Further, the portable information terminal 700 may further include other sensors such as a barometric pressure sensor.

[0106] The mobile information terminal 700 may be a mobile phone, a smartphone, a tablet terminal, etc. It may also be a PDA (Personal Digital Assistants) or a notebook PC. Further, it may be a digital still camera, a video camera capable of video shooting, a portable game machine, a navigation device, etc., or other portable digital devices.

[0107] Note that the configuration example of the mobile information terminal 700 shown in FIG. 3C includes many components that are not essential to this embodiment, such as the sensor unit 760, etc. However, the effects of this embodiment will not be impaired even if these components are not provided. Further, configurations not shown, such as a digital broadcast reception function and an electronic money settlement function, may be further added.

[0108] [Software Configuration of Mobile Information Terminal] FIG. 3D is a software configuration diagram of the mobile information terminal 700, showing an example of the software configuration in the ROM 703, the RAM 704, and the storage unit 710. In the ROM 703, a basic operation program 7001 and other operation programs are stored. In the storage unit 710, a cooperation control program 7002 and other operation programs are stored. Further, the storage unit 710 is assumed to include a content storage area 7200 for storing content data such as videos, still images, and voices, an authentication information storage area 7300 for storing authentication information necessary when accessing a television receiver or each server device, and various information storage areas for storing other various information.

[0109] The basic operation program 7001 stored in the ROM 703 is expanded into the RAM 704, and further, the main control unit 701 executes the expanded basic operation program to constitute a basic operation execution unit 7101. Similarly, the cooperation control program 7002 stored in the storage unit 710 is expanded into the RAM 704, and further, the main control unit 701 executes the expanded cooperation control program to constitute a cooperation control execution unit 7102. Further, the RAM 704 is assumed to include a temporary storage area for temporarily holding data created when each operation program is executed, as necessary.

[0110] Hereinafter, for the sake of simplicity of explanation, the process of controlling each operation block by expanding and executing the basic operation program 7001 stored in the ROM 703 by the main control unit 701 in the RAM 704 will be described as being performed by the basic operation execution unit 7101 for controlling each operation block. The same description will be made for other operation programs.

[0111] The cooperation control execution unit 7102 manages device authentication and connection, transmission and reception of each data, etc. when the mobile information terminal 700 performs an associated operation with the television receiver. In addition, the cooperation control execution unit 7102 is provided with a browser engine function for executing an application that interlocks with the television receiver.

[0112] Each of the above operation programs may be stored in advance in the ROM 703 and / or the storage unit 710 at the time of product shipment. After product shipment, it may be acquired from a server device on the Internet 800 via the LAN communication unit 721 or the mobile phone network communication unit 722. Also, each of the operation programs stored in a memory card, an optical disk, etc. may be acquired via the expansion interface unit 724 or the like.

[0113] [Broadcast wave of digital broadcast] Here, an example of the broadcast wave of the digital broadcast received by the broadcast receiving apparatus according to the embodiment of the present invention will be described.

[0114] The broadcast receiving apparatus 100 is capable of receiving a terrestrial digital broadcast service that shares at least some specifications with the ISDB-T (Integrated Services Digital Broadcasting for Terrestrial Television Broadcasting) system. Specifically, the dual-polarization terrestrial digital broadcast and the single-polarization terrestrial digital broadcast that can be received by the second tuner / demodulator unit 130T are advanced terrestrial digital broadcasts that share some specifications with the ISDB-T system. Also, the hierarchical division multiplex terrestrial digital broadcast that can be received by the third tuner / demodulator unit 130L is an advanced terrestrial digital broadcast that shares some specifications with the ISDB-T system. Note that the current terrestrial digital broadcast that can be received by the first tuner / demodulator unit 130C is a terrestrial digital broadcast of the ISDB-T system. Also, the advanced BS digital broadcast and the advanced CS digital broadcast that can be received by the fourth tuner / demodulator unit 130B are digital broadcasts different from the ISDB-T system.

[0115] Here, the dual-polarization terrestrial digital broadcast, the single-polarization terrestrial digital broadcast, and the hierarchical division multiplex terrestrial digital broadcast according to the present embodiment employ OFDM (Orthogonal Frequency Division Multiplexing), which is one of the multi-carrier systems, as in the ISDB-T system. Since OFDM is a multi-carrier system, the symbol length is long, and it is effective to add a redundant portion in the time axis direction called a guard interval, and it is possible to reduce the influence of multipath within the range of the guard interval. For this reason, it is possible to realize an SFN (Single Frequency Network), and effective utilization of frequency is possible.

[0116] The dual-polarization terrestrial digital broadcast, single-polarization terrestrial digital broadcast, and hierarchical division multiplex terrestrial digital broadcast according to this embodiment divide OFDM carriers into groups called segments, similar to the ISDB-T system. As shown in Fig. 4A, one channel bandwidth of the digital broadcast service is composed of 13 segments. The center of the band is set as the position of segment 0, and segment numbers (0 to 12) are sequentially assigned above and below this. The channel coding of the dual-polarization terrestrial digital broadcast, single-polarization terrestrial digital broadcast, and hierarchical division multiplex terrestrial digital broadcast according to this embodiment is performed in units of OFDM segments. Therefore, it is possible to define hierarchical transmission. For example, within the bandwidth of one television channel, some OFDM segments can be assigned to fixed reception services and the rest to mobile reception services respectively. In hierarchical transmission, each layer is composed of one or more OFDM segments, and parameters such as the carrier modulation method, coding rate of the inner code, time interleaving length, etc. can be set for each layer. Note that the number of layers can be arbitrarily set. For example, it can be set up to a maximum of 3 layers. Fig. 4B shows an example of the layer assignment of OFDM segments when the number of layers is 3 or 2. In the example of Fig. 4B(1), the number of layers is 3, layer A is composed of 1 segment (segment 0), layer B is composed of 7 segments (segments 1 to 7), and layer C is composed of 5 segments (segments 8 to 12). In the example of Fig. 4B(2), the number of layers is 3, layer A is composed of 1 segment (segment 0), layer B is composed of 5 segments (segments 1 to 5), and layer C is composed of 7 segments (segments 6 to 12). In the example of Fig. 4B(3), the number of layers is 2, layer A is composed of 1 segment (segment 0), and layer B is composed of 12 segments (segments 1 to 12). The number of OFDM segments and channel coding parameters, etc. for each layer are determined according to the programming information and transmitted by the TMCC signal, which is control information for assisting the operation of the receiver.

[0117] Note that as an example of the usage examples of the segment layer assignments in Fig. 4B(1), (2), and (3), for example, the following examples may exist.

[0118] For example, the hierarchical assignment in FIG. 4B(1) can be used in the polarization - dual - mode terrestrial digital broadcast according to this embodiment. For both horizontal polarization and vertical polarization, the same segment hierarchical assignment can be used. Specifically, as the A - layer, the mobile - receiver service of the current terrestrial digital broadcast can be transmitted in the above - mentioned 1 segment of horizontal polarization. (Note that the mobile - receiver service of the current terrestrial digital broadcast may also be transmitted in the above - mentioned 1 segment of vertical polarization. In this case, it is also treated as the A - layer.) Also, as the B - layer, in the above - mentioned 7 segments of horizontal polarization, a terrestrial digital broadcast service that transmits a video with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, which is the current terrestrial digital broadcast, can be transmitted. (Note that the terrestrial digital broadcast service that transmits a video with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically may also be transmitted in the above - mentioned 7 segments of vertical polarization. In this case, it is also treated as the B - layer.) Further, as the C - layer, a high - level terrestrial digital broadcast service capable of transmitting a video with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels can be configured to be transmitted in the above - mentioned 5 segments of both horizontal polarization and vertical polarization, a total of 10 segments. The details of the transmission will be described later. The transmission wave of the segment hierarchical assignment can be received, for example, by the second tuner / demodulation unit 130T of the broadcast receiving apparatus 100.

[0119] In addition, the hierarchical assignment in FIG. 4B(1) can be used in the single-polarization terrestrial digital broadcast according to this embodiment. Specifically, as the A layer, the mobile reception service of the current terrestrial digital broadcast may be transmitted in the above 1 segment. Also, as the B layer, in the above 7 segments, a terrestrial digital broadcast service that transmits a video with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, which is the current terrestrial digital broadcast, may be transmitted. Further, as the C layer, in the above 5 segments, it may be configured to transmit an advanced terrestrial digital broadcast service capable of transmitting a video with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels. In this case, in the C layer, a carrier modulation method, an error correction code method, a video encoding method, etc. with higher efficiency than the current terrestrial digital broadcast are used. Details of the transmission will be described later. The transmission wave of the segment layer assignment can be received, for example, by the second tuner / demodulator 130T of the broadcast receiving apparatus 100.

[0120] Also, as an example not shown, in the single-polarization terrestrial digital broadcast according to this embodiment, the mobile reception service of the current terrestrial digital broadcast is transmitted in 1 segment of the A layer, and a terrestrial digital broadcast service that transmits a video with a maximum resolution of 1920 pixels horizontally × 1080 pixels, which is the current terrestrial digital broadcast, is transmitted in 8 segments of the B layer. Further, it may be configured to transmit an advanced terrestrial digital broadcast service capable of transmitting a video with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels in 4 segments of the C layer. In this case also, in the C layer, a carrier modulation method, an error correction code method, a video encoding method, etc. with higher efficiency than the current terrestrial digital broadcast are used. Details of the transmission will be described later. The transmission wave of the segment layer assignment can be received, for example, by the second tuner / demodulator 130T of the broadcast receiving apparatus 100.

[0121] For example, the hierarchical assignment in FIG. 4B(2) can be used as another example different from FIG. 4B(1) in the polarization-duplex terrestrial digital broadcast according to this embodiment. The same segment hierarchical assignment can be used for both the horizontal polarization and the vertical polarization. Specifically, the mobile reception service of the current terrestrial digital broadcast can be transmitted in the above-mentioned 1 segment of the horizontal polarization as the A layer. (Note that the mobile reception service of the current terrestrial digital broadcast may also be transmitted in the above-mentioned 1 segment of the vertical polarization. In this case, this is also treated as the A layer.) Further, as the B layer, an advanced terrestrial digital broadcast service capable of transmitting a video with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels vertically in the above-mentioned 5 segments of both the horizontal polarization and the vertical polarization, a total of 10 segments, may be configured to be transmitted. Also, as the C layer, the terrestrial digital broadcast service that transmits a video with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, which is the current terrestrial digital broadcast, may be transmitted in the above-mentioned 7 segments of the horizontal polarization. (Note that the terrestrial digital broadcast service that transmits a video with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically may also be transmitted in the above-mentioned 7 segments of the vertical polarization. In this case, this is also treated as the C layer.) Details of the transmission will be described later. The transmission wave of the segment hierarchical assignment can be received, for example, by the second tuner / demodulation unit 130T of the broadcast receiving apparatus 100 of this embodiment.

[0122] Also, the hierarchical assignment in FIG. 4B(2) can be used as another example different from FIG. 4B(1) in the single-polarization terrestrial digital broadcast according to this embodiment. Specifically, as the A layer, the mobile reception service of the current terrestrial digital broadcast may be transmitted in the above 1 segment. Further, as the B layer, it may be configured to transmit an advanced terrestrial digital broadcast service capable of transmitting a video having a pixel number exceeding 1920 horizontal pixels × 1080 vertical pixels as the maximum resolution in the above 5 segments. In this case, in the B layer, a carrier modulation method, an error correction code method, a video coding method, etc. with higher efficiency than the current terrestrial digital broadcast are used. Also, as the C layer, a terrestrial digital broadcast service that transmits a video having a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels, which is the current terrestrial digital broadcast, may be transmitted in the above 7 segments. Details of the transmission will be described later. The transmission wave of the segment layer assignment can be received, for example, by the second tuner / demodulation unit 130T of the broadcast receiving apparatus 100 of this embodiment.

[0123] For example, the hierarchical assignment in FIG. 4B(3) can be used in the hierarchical division multiplex terrestrial digital broadcast according to this embodiment and the current terrestrial digital broadcast. Specifically, when used in the hierarchical division multiplex terrestrial digital broadcast, the mobile reception service of the current terrestrial digital broadcast may be transmitted in one segment in the figure as the A layer. Further, as the B layer, a high-level terrestrial digital broadcast service capable of transmitting a video with a pixel number exceeding 1920 horizontal pixels × 1080 vertical pixels as the maximum resolution or the current terrestrial digital broadcast service for transmitting a video with 1920 horizontal pixels × 1080 vertical pixels as the maximum resolution may be configured to be transmitted in 12 segments in the figure. The transmission wave of the segment hierarchical assignment can be received, for example, by the third tuner / demodulator 130L of the broadcast receiving apparatus 100 of this embodiment. When used in the current terrestrial digital broadcast, the mobile reception service of the current terrestrial digital broadcast may be transmitted in one segment in the figure as the A layer, and the terrestrial digital broadcast service for transmitting a video with 1920 horizontal pixels × 1080 vertical pixels as the maximum resolution, which is the current terrestrial digital broadcast, may be transmitted in 12 segments in the figure as the B layer. The transmission wave of the segment hierarchical assignment can be received, for example, by the first tuner / demodulator 130C of the broadcast receiving apparatus 100 of this embodiment.

[0124] Fig. 4C shows an example of a broadcasting station side system that realizes the generation process of an OFDM transmission wave, which is a digital broadcast wave of polarization - dual - use terrestrial digital broadcasting, single - polarization terrestrial digital broadcasting, and hierarchical division multiplex terrestrial digital broadcasting according to this embodiment. The information source encoding unit 411 encodes video / audio / various data, etc. respectively. The multiplexing unit / limited reception processing unit 415 multiplexes the video / audio / various data, etc. encoded by the information source encoding unit 411 respectively, and further appropriately executes processing corresponding to limited reception, and outputs it as a packet stream. A plurality of information source encoding units 411 and multiplexing units / limited reception processing units 415 can exist in parallel, and generate a plurality of packet streams. In the transmission path encoding unit 416, the plurality of packet streams are remultiplexed into one packet stream, and transmission path encoding processing is performed and output as an OFDM transmission wave. The configuration shown in Fig. 4C is common to the ISDB - T system as a configuration for realizing the generation process of the OFDM transmission wave, although the details of the information source encoding and transmission path encoding methods are different. Therefore, among the plurality of information source encoding units 411 and multiplexing units / limited reception processing units 415, a part can be configured for the terrestrial digital broadcasting service of the ISDB - T system, and a part can be configured for the advanced terrestrial digital broadcasting service, and the packet streams of a plurality of different terrestrial digital broadcasting services can be multiplexed by the transmission path encoding unit 416. When the multiplexing unit / limited reception processing unit 415 is configured for the terrestrial digital broadcasting service of the ISDB - T system, it is only necessary to generate an MPEG - 2TS (Transport Stream Packet) stream, which is an MPEG - 2TS defined in the MPEG - 2 systems. Also, when the multiplexing unit / limited reception processing unit 415 is configured for the advanced terrestrial digital broadcasting service, it is only necessary to generate an MMT packet stream or a TLV stream including MMT packets, or a TSP stream defined in other systems. Of course, all of the plurality of information source encoding units 411 and multiplexing units / limited reception processing units 415 can be configured for the advanced terrestrial digital broadcasting service, and all the packet streams multiplexed by the transmission path encoding unit 416 can be packet streams for the advanced terrestrial digital broadcasting service.

[0125] FIG. 4D shows an example of the configuration of the transmission path encoding unit 416.

[0126] First, FIG. 4D(1) will be described. FIG. 4D(1) is the configuration of the transmission path encoding unit 416 when generating only the OFDM transmission wave of the digital broadcast of the current terrestrial digital broadcast service. The OFDM transmission wave transmitted in this configuration has, for example, the segment configuration of FIG. 4B(3). The packet stream input from the multiplexing unit / limiting reception processing unit 415 and subjected to remultiplexing processing is not only added with the redundancy of error correction, but also subjected to various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving. Then, together with the pilot signal, TMCC signal, and AC signal, processing by IFFT (Inverse Fast Fourier Transform) is performed, and after adding a guard interval, it becomes an OFDM transmission wave through quadrature modulation. Note that the outer code processing, power spreading processing, byte interleaving, inner code processing, bit interleaving processing, and mapping processing are configured to be able to be processed separately for each layer such as layer A and layer B. (In the digital broadcast of the current terrestrial digital broadcast service, it is operationally two layers, but it can be transmitted up to three layers. Therefore, an example of three layers is shown in FIG. 4D(1).) The mapping processing is the modulation processing of the carrier. Also, the packet stream input from the multiplexing unit / limiting reception processing unit 415 may be multiplexed with information such as TMCC information, mode, and guard interval ratio. Note that the packet stream input to the transmission path encoding unit 416 may be a TSP stream defined in the MPEG-2 systems as described above. The OFDM transmission wave generated by the configuration of FIG. 4D(1) can be received, for example, by the first tuner / demodulation unit 130C of the broadcast receiving apparatus 100 of the present embodiment.

[0127] Next, FIG. 4D(2) will be described. FIG. 4D(2) shows the configuration of the transmission path encoder 416 when generating an OFDM transmission wave for polarization - multiplexed terrestrial digital broadcasting according to this embodiment. The OFDM transmission wave transmitted in this configuration has, for example, the segment configuration shown in FIG. 4B(1) or (2). Also in FIG. 4D(2), the packet stream input from the multiplexing / limiting reception processing unit 415 and subjected to remultiplexing processing has error - correction redundancy added, and various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving are performed. Thereafter, processing by IFFT is performed together with the pilot signal, TMCC signal, and AC signal, and after guard interval addition processing, it becomes an OFDM transmission wave through quadrature modulation.

[0128] In the configuration example of FIG. 4D(2), the outer - code processing, power - spreading processing, byte interleaving, inner - code processing, bit - interleaving processing, mapping processing, and time interleaving are configured to be processed separately for each layer such as layer A, layer B, and layer C. However, the configuration example of FIG. 4D(2) generates not only the OFDM transmission wave of horizontal polarization (H) but also the OFDM transmission wave of vertical polarization (V), and the processing flow branches into two systems. When branching from the processing system of horizontal polarization (H) to the processing system of vertical polarization (V), whether to branch the same data as the processing system of horizontal polarization (H) to the processing system of vertical polarization (V), whether to branch different data from the processing system of horizontal polarization (H) to the processing system of vertical polarization (V), or whether not to branch data to the processing system of vertical polarization (V) can be made different for each layer corresponding to the segment configuration described in FIG. 4B(1) or (2).

[0129] The processing such as outer code, inner code, and mapping shown in the configuration of FIG. 4D(2) can use more advanced processing that is not adopted in each processing of the configuration of FIG. 4D(1) in addition to the processing compatible with the configuration of FIG. 4D(1). Specifically, among the configurations of FIG. 4D(2), for the parts where processing is performed for each layer, in the layer where the current terrestrial digital broadcast mobile reception service or the current terrestrial digital broadcast service that transmits video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels is transmitted, processing such as outer code, inner code, and mapping is performed with processing compatible with the configuration of FIG. 4D(1). On the other hand, among the configurations of FIG. 4D(2), for the parts where processing is performed for each layer, for the layer that transmits an advanced terrestrial digital broadcast service capable of transmitting video with a pixel number exceeding horizontal 1920 pixels × vertical 1080 pixels as the maximum resolution, the processing such as outer code, inner code, and mapping may be configured to use more advanced processing that is not adopted in each processing of the configuration of FIG. 4D(1).

[0130] Note that in the polarization - dual - use terrestrial digital broadcast according to this embodiment, since the allocation of the layer and the terrestrial digital broadcast service to be transmitted can be switched by the TMCC information to be described later, it is desirable to configure the processing such as outer code, inner code, and mapping performed for each layer to be switchable by the TMCC information.

[0131] Note that for the layer that transmits an advanced terrestrial digital broadcast service capable of transmitting video with a pixel number exceeding horizontal 1920 pixels × vertical 1080 pixels as the maximum resolution, byte interleaving, bit interleaving, and time interleaving may perform processing compatible with the current terrestrial digital broadcast service, or may perform more advanced different processing. Or for the layer that transmits an advanced terrestrial digital broadcast service, some interleaving may be omitted.

[0132] Also, in the configuration of FIG. 4D(2), the input stream serving as the source of the layer where the current terrestrial digital broadcast mobile reception service or the current terrestrial digital broadcast service for transmitting video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels is transmitted may be the stream of TSP defined in the MPEG-2 systems adopted in the current terrestrial digital broadcast among the packet streams input to the transmission path encoding unit 416. The input stream serving as the source of the layer for transmitting the advanced terrestrial digital broadcast service in the configuration of FIG. 4D(2) may be a stream defined by a system other than the stream of TSP defined in the MPEG-2 systems, such as an MMT packet stream or a TLV including MMT packets, among the packet streams input to the transmission path encoding unit 416. However, a stream of TSP defined in the MPEG-2 systems may be adopted for the advanced terrestrial digital broadcast service.

[0133] In the configuration of FIG. 4D(2) described above, until the OFDM transmission wave is generated from the input stream, in the layer where the current terrestrial digital broadcast mobile reception service or the current terrestrial digital broadcast service for transmitting video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels is transmitted, a stream format and processing compatible with the current terrestrial digital broadcast are maintained. Thereby, even when one of the OFDM transmission waves of horizontal polarization or vertical polarization generated in the configuration of FIG. 4D(2) is received by a receiving device of the existing current terrestrial digital broadcast service, for the layer where the current terrestrial digital broadcast mobile reception service or the current terrestrial digital broadcast service for transmitting video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels is transmitted, it becomes possible to correctly receive and demodulate the broadcast signal of the terrestrial digital broadcast service.

[0134] In addition, in the configuration of FIG. 4D(2), in the layer using segments of both the horizontally polarized OFDM transmission wave and the vertically polarized OFDM transmission wave, it is possible to transmit an advanced terrestrial digital broadcast service capable of transmitting a video with a pixel count exceeding 1920 horizontal pixels × 1080 vertical pixels as the maximum resolution, and the broadcast signal of the advanced terrestrial digital broadcast service can be received and demodulated by the broadcast receiving apparatus 100 according to an embodiment of the present invention.

[0135] That is, in the configuration of FIG. 4D(2), in a broadcast receiving apparatus corresponding to an advanced terrestrial digital broadcast service and also in a receiving apparatus for an existing current terrestrial digital broadcast service, it is possible to generate a digital broadcast wave with which digital broadcasts can be suitably received and demodulated.

[0136] When generating the OFDM transmission wave of the single-polarization terrestrial digital broadcast according to this embodiment, the transmission path encoding unit 416 shown in FIG. 4D(2) may be configured by only one of the system for generating the OFDM transmission wave of the horizontally polarized wave (H) and the system for generating the OFDM transmission wave of the vertically polarized wave (V). Also in this case, the OFDM transmission wave transmitted in this configuration has, for example, the segment configuration of FIG. 4B(1) or (2). However, unlike the case of generating the OFDM transmission wave of the above-described dual-polarization terrestrial digital broadcast, only one of the horizontally polarized OFDM transmission wave and the vertically polarized OFDM transmission wave is transmitted. Other configurations and operations are the same as in the case of generating the OFDM transmission wave of the above-described dual-polarization terrestrial digital broadcast.

[0137] Next, FIG. 4D(3) will be described. FIG. 4D(3) shows the configuration of the transmission path encoding unit 416 when generating an OFDM transmission wave for hierarchical division multiplex terrestrial digital broadcasting according to this embodiment. Also in FIG. 4D(3), the packet stream input from the multiplexing unit / limited reception processing unit 415 and subjected to remultiplexing processing has error correction redundancy added thereto, and various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving are performed. Thereafter, processing by IFFT is performed together with the pilot signal, TMCC signal, and AC signal, and after adding a guard interval, it becomes an OFDM transmission wave through quadrature modulation.

[0138] However, in the configuration of FIG. 4D(3), modulated waves transmitted in the upper layer and modulated waves transmitted in the lower layer are generated respectively, multiplexed, and then an OFDM transmission wave which is a digital broadcast wave is generated. The processing system shown above the configuration of FIG. 4D(3) is a processing system for generating the modulated wave transmitted in the upper layer, and the processing system shown below is a processing system for generating the modulated wave transmitted in the lower layer. The data transmitted by the processing system for generating the modulated wave transmitted in the upper layer of FIG. 4D(3) is the current terrestrial digital broadcast mobile reception service or the current terrestrial digital broadcast service for transmitting video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels. Various processes in the processing system for generating the modulated wave transmitted in the upper layer of FIG. 4D(3) are the same as or compatible with the various processes of FIG. 4D(1). The modulated wave transmitted in the upper layer of FIG. 4D(3) has, for example, the segment configuration of FIG. 4B(3) similar to the transmission wave of FIG. 4D(1). Therefore, the modulated wave transmitted in the upper layer of FIG. 4D(3) is a digital broadcast wave compatible with the current terrestrial digital broadcast mobile reception service or the current terrestrial digital broadcast service for transmitting video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels. On the other hand, the data transmitted by the processing system for generating the modulated wave transmitted in the lower layer of FIG. 4D(3) is an advanced terrestrial digital broadcast service capable of transmitting video with a pixel number exceeding horizontal 1920 pixels × vertical 1080 pixels as the maximum resolution. For example, for processes such as outer code, inner code, and mapping, it may be configured to use more advanced processes not adopted in each process of the configuration of FIG. 4D(1).

[0139] The modulated wave transmitted in the lower layer of FIG. 4D(3) may be assigned, for example, to an advanced terrestrial digital broadcast service capable of transmitting a video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels with all 13 segments as the A layer. Alternatively, it may transmit the mobile reception service of the current terrestrial digital broadcast in one segment of the A layer having the segment configuration of FIG. 4B(3), and transmit an advanced terrestrial digital broadcast service capable of transmitting a video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels in 12 segments of the B layer. In the latter case, similar to FIG. 4D(2), it may be configured so that the processing can be switched for each layer such as the A layer and the B layer from the outer code processing to the time interleaving processing. In the layer that transmits the mobile reception service of the current terrestrial digital broadcast, it is necessary to maintain the processing compatible with the current terrestrial digital broadcast, which is the same as the explanation in FIG. 4D(2).

[0140] In the configuration of FIG. 4D(3), an OFDM transmission wave, which is a terrestrial digital broadcast wave obtained by multiplexing the modulated wave transmitted in the upper layer and the modulated wave transmitted in the lower layer, is generated. Since the technology for separating the modulated wave transmitted in the upper layer from the OFDM transmission wave is also installed in the receiving devices of the existing current terrestrial digital broadcast services, the broadcast signals of the mobile reception service of the current terrestrial digital broadcast and the current terrestrial digital broadcast service for transmitting a video with a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels included in the modulated wave transmitted in the upper layer can be correctly received and demodulated by the receiving devices of the existing current terrestrial digital broadcast services. On the other hand, the broadcast signals of the advanced terrestrial digital broadcast service capable of transmitting a video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels included in the modulated wave transmitted in the lower layer can be received and demodulated by the broadcast receiving device 100 according to the embodiment of the present invention.

[0141] That is, in the configuration of FIG. 4D(3), even in a broadcast receiving apparatus corresponding to an advanced terrestrial digital broadcast service and in an existing terrestrial digital broadcast service receiving apparatus, a digital broadcast wave that can suitably receive and demodulate digital broadcasts can be generated. Further, in the configuration of FIG. 4D(3), unlike the configuration of FIG. 4D(2), it is not necessary to use a plurality of polarization waves, and an OFDM transmission wave that can be received more simply can be generated.

[0142] In the OFDM transmission wave generation process according to FIGS. 4D(1), 4D(2), and 4D(3) of this embodiment, three types of modes with different numbers of carriers are prepared in consideration of compatibility with the placement interval of SFNs and resistance to Doppler shift in mobile reception. Note that additional different modes with different numbers of carriers may be prepared. In a mode with a large number of carriers, the effective symbol length becomes long, and if the same guard interval ratio (guard interval length / effective symbol length) is used, the guard interval length becomes long, making it possible to have resistance to multipaths with a long delay time difference. On the other hand, in the case of a mode with a small number of carriers, the carrier interval becomes wide, making it possible to reduce the influence of carrier interference due to Doppler shift that occurs in the case of mobile reception or the like.

[0143] In the OFDM transmission wave generation process according to FIGS. 4D(1), 4D(2), and 4D(3) of this embodiment, parameters such as the carrier modulation method, the coding rate of the inner code, and the time interleaving length can be set for each layer composed of one or more OFDM segments. FIG. 4E shows an example of the transmission parameters for each segment of the OFDM segment identified by the mode of the system according to this embodiment. Note that the carrier modulation method in the figure refers to the modulation method of the 'data' carrier. The SP signal, CP signal, TMCC signal, and AC signal adopt a modulation method different from the modulation method of the 'data' carrier. Since these signals are signals for which noise resistance is more important than the amount of information, a modulation method is adopted in which mapping is performed to a low-value constellation (BPSK or DBPSK, that is, 2 states) with a smaller number of states than the modulation method of the 'data' carrier (all of which are QPSK or higher, that is, 4 states or more), thereby enhancing the noise resistance.

[0144] In addition, for each numerical value of the number of carriers, the value on the left side of the diagonal line is the value when QPSK, 16QAM, 64QAM, etc. are set as the carrier modulation method, and the value on the right side of the diagonal line is the value when DQPSK is set as the carrier modulation method. In the figure, the underlined parameters are parameters that are not compatible with the current mobile reception service of terrestrial digital broadcasting. Specifically, 256QAM, 1024QAM, and 4096QAM of the modulation method of the 'Data' carrier are not adopted in the current terrestrial digital broadcasting service. Therefore, in the processing of the layer that requires compatibility with the current terrestrial digital broadcasting service in the OFDM broadcast wave generation process according to FIGS. 4D(1), 4D(2), and 4D(3) of this embodiment, 256QAM, 1024QAM, and 4096QAM of the modulation method of the 'Data' carrier are not used. For the 'Data' carrier transmitted in the layer corresponding to the advanced terrestrial digital broadcasting service, in addition to modulation methods such as QPSK (number of states 4), 16QAM (number of states 16), and 64QAM (number of states 64) that are compatible with the current terrestrial digital broadcasting service, more multi-value modulation methods such as 256QAM (number of states 256), 1024QAM (number of states 1024), and 4096QAM (number of states 4096) may be applied. Also, modulation methods different from these may be adopted.

[0145] Note that for the modulation method of the pilot symbol (SP or CP) carrier, BPSK (number of states 2) that is compatible with the current terrestrial digital broadcasting service may be used. For the modulation methods of the AC carrier and the TMCC carrier, DBPSK (number of states 2) that is compatible with the current terrestrial digital broadcasting service may be used.

[0146] Also, as an inner code processing method, the LDPC code is not adopted in the current terrestrial digital broadcast service. Therefore, in the processing of the layer that requires compatibility with the current terrestrial digital broadcast service in the OFDM broadcast wave generation process according to FIGS. 4D(1), 4D(2), and 4D(3) of this embodiment, the LDPC code is not used. For the data transmitted in the layer corresponding to the advanced terrestrial digital broadcast service, the LDPC code may be applied as the inner code. Also, as an outer code processing method, the BCH code is not adopted in the current terrestrial digital broadcast service. Therefore, in the processing of the layer that requires compatibility with the current terrestrial digital broadcast service in the OFDM broadcast wave generation process according to FIGS. 4D(1), 4D(2), and 4D(3) of this embodiment, the BCH code is not used. For the data transmitted in the layer corresponding to the advanced terrestrial digital broadcast service, the BCH code may be applied as the outer code.

[0147] Also, FIG. 4F shows an example of the transmission signal parameters per physical channel (6 MHz bandwidth) in the OFDM broadcast wave generation process according to FIGS. 4D(1), 4D(2), and 4D(3) of this embodiment. In the OFDM broadcast wave generation process according to FIGS. 4D(1), 4D(2), and 4D(3) of this embodiment, basically, for compatibility with the current terrestrial digital broadcast service, the parameters in FIG. 4F generally adopt parameters that are compatible with the current terrestrial digital broadcast service. However, when all segments are assigned to the advanced terrestrial digital broadcast service in the modulated wave transmitted in the lower layer of FIG. 4D(3), it is not necessary to maintain compatibility with the current terrestrial digital broadcast service in that modulated wave. Therefore, in this case, parameters other than those shown in FIG. 4F may be used for the modulated wave transmitted in the lower layer of FIG. 4D(3).

[0148] Next, the carriers of the OFDM transmission wave according to this embodiment will be described. Among the carriers of the OFDM transmission wave according to this embodiment, in addition to the carriers for transmitting data such as video and audio, there are carriers for transmitting pilot signals (SP, CP, AC1, AC2) serving as demodulation references, and carriers for transmitting TMCC signals which are information such as the modulation format and convolutional coding rate of the carriers. For these transmissions, a number of carriers corresponding to 1 / 9 of the number of carriers per segment are used. Also, concatenated codes are adopted for error correction, a shortened Reed Solomon (204, 188) code is used for the outer code, and a punctured convolutional code with a constraint length of 7 and a coding rate of 1 / 2 as the mother code is used for the inner code. Different coding may be used for both the outer code and the inner code. The information rate varies depending on parameters such as the carrier modulation format, convolutional coding rate, and guard interval ratio.

[0149] Also, 204 symbols are taken as one frame, and an integer number of TSPs are included within one frame. The switching of transmission parameters is performed at the boundary of this frame.

[0150] The pilot signals serving as demodulation references include SP (Scattered Pilot), CP (Continual Pilot), AC (Auxiliary Channel) 1, and AC2. FIGS. 4G show an example of the arrangement image within a segment of pilot signals and the like in the case of synchronous modulation (QPSK, 16QAM, 64QAM, 256QAM, 1024QAM, 4096QAM, etc.). SP is inserted into the segment of synchronous modulation and is transmitted once every 12 carriers in the carrier number (frequency axis) direction and once every 4 symbols in the OFDM symbol number (time axis) direction. Since the amplitude and phase of SP are known, it can be used as a reference for synchronous demodulation. FIGS. 4H show an example of the arrangement image within a segment of pilot signals and the like in the case of differential modulation (DQPSK, etc.). CP is a continuous signal inserted at the left end of the segment of differential modulation and is used for demodulation.

[0151] AC1 and AC2 carry information for the CP and are used not only for the pilot signal but also for transmitting information for broadcasters. They may also be used for transmitting other information.

[0152] Note that the layout images shown in FIGS. 4G and 4H are examples for Mode 3, and the carrier numbers range from 0 to 431. However, for Mode 1 and Mode 2, they are 0 to 107 and 0 to 215 respectively. Also, the carriers for transmitting AC1, AC2, and TMCC may be determined in advance for each segment. In addition, the carriers for transmitting AC1, AC2, and TMCC are arranged randomly in the frequency direction in order to reduce the influence of periodic dips in the transmission path characteristics due to multipath.

[0153] [TMCC signal] The TMCC signal transmits information (TMCC information) related to the demodulation operation of the receiver, such as the hierarchical structure and transmission parameters of the OFDM segment. The TMCC signal is transmitted on the carriers specified for TMCC transmission within each segment. FIG. 5A shows an example of the bit assignment of the TMCC carrier. The TMCC carrier is composed of 204 bits (B0 to B203). B0 is a demodulation reference signal for the TMCC symbol and has a predetermined amplitude and phase reference. B1 to B16 are synchronization signals and are composed of 16-bit words. Two types of synchronization signals, w0 and w1, are defined, and w0 and w1 are sent alternately for each frame. B17 to B19 are used for identifying the segment format and identify whether each segment is a differential modulation section or a synchronization modulation section. B20 to B121 contain the TMCC information. B122 to B203 are parity bits.

[0154] The TMCC information of the OFDM transmission wave according to this embodiment may be configured to include information for assisting the demodulation and decoding operations of the receiver, such as, for example, system identification, transmission parameter switching indicator, startup control signal (startup flag for emergency warning broadcast), current information, next information, frequency conversion process identification, physical channel number identification, main signal identification, 4K signal transmission layer identification, additional layer transmission identification, etc. The current information indicates the current layer configuration and transmission parameters, and the next information indicates the layer configuration and transmission parameters after switching. The switching of the transmission parameters is performed on a frame-by-frame basis. FIG. 5B shows an example of the bit allocation of the TMCC information. Also, FIG. 5C shows an example of the configuration of the transmission parameter information included in the current information / next information. Note that the concatenated transmission phase correction amount is control information used when the transmission method is common terrestrial digital audio broadcasting ISDB-TSB (ISDB for Terrestrial Sound Broadcasting), etc., and the detailed description thereof is omitted here.

[0155] FIG. 5D shows an example of the bit allocation of the system identification. 2 bits are allocated to the signal for system identification. In the case of the current terrestrial digital television broadcast system, '00' is set. In the case of a common terrestrial digital audio broadcast system with the same transmission method, '01' is set. Also, in the case of an advanced terrestrial digital television broadcast system such as the polarization-duplex terrestrial digital broadcast or single-polarization terrestrial digital broadcast or layer-division multiplex terrestrial digital broadcast according to this embodiment, '10' is set. In the advanced terrestrial digital television broadcast system, 2K broadcast programs (broadcast programs of images with 1920 horizontal pixels × 1080 vertical pixels, and broadcast programs of images with lower resolutions may also be included) and 4K broadcast programs (broadcast programs of images exceeding 1920 horizontal pixels × 1080 vertical pixels, not limited to broadcast programs of images with 3840 horizontal pixels × 2160 vertical pixels) can be transmitted simultaneously within the same service by transmitting broadcast waves by the polarization-duplex transmission method or single-polarization terrestrial digital broadcast or layer-division multiplex method.

[0156] The transmission parameter switching indicator is used to notify the receiver of the switching timing by counting down when switching the transmission parameters. This indicator usually has a value of '1111', and when switching the transmission parameters, it is decremented by 1 for each frame starting from 15 frames before the switch. The switching timing is the next frame synchronization when '0000' is sent. After the value of the indicator reaches '0000', it returns to '1111'. When switching any one or more of the parameters such as the system identification of the TMCC information shown in FIG. 5B, the transmission parameter information, the frequency conversion processing identification, the main signal identification, the 4K signal transmission layer identification, and the additional layer transmission identification included in the current information / next information, counting down is performed. When only switching the activation control signal of the TMCC information, counting down is not performed.

[0157] The activation control signal (activation flag for emergency warning broadcast) is set to '1' when activation control of the receiver is being performed in an emergency warning broadcast, and '0' when activation control is not being performed.

[0158] The partial reception flag for each current information / next information is set to '1' when the segment in the center of the transmission band is set for partial reception, and '0' otherwise. When segment 0 is set for partial reception, that layer is defined as layer A. When there is no next information, the partial reception flag is set to '1'.

[0159] FIG. 5E shows an example of bit allocation for a carrier modulation mapping method (modulation method of data carriers) in each hierarchical transmission parameter for current information / next information. When this parameter is '000', it indicates that the modulation method is DQPSK. When it is '001', it indicates that the modulation method is QPSK. When it is '010', it indicates that the modulation method is 16QAM. When it is '011', it indicates that the modulation method is 64QAM. When it is '100', it indicates that the modulation method is 256QAM. When it is '101', it indicates that the modulation method is 1024QAM. When it is '110', it indicates that the modulation method is 4096QAM. When there is no unused hierarchy or next information, '111' is set for this parameter.

[0160] Settings such as the coding rate and the length of time interleaving may be set for each parameter according to the composition information of each hierarchy for current information / next information. The number of segments indicates the number of segments of each hierarchy as a 4-bit value. When there is no unused hierarchy or next information, '1111' is set. Note that since settings such as the mode and the guard interval ratio are detected independently on the receiver side, transmission in TMCC information may not be performed.

[0161] FIG. 5F shows an example of bit assignment for frequency conversion process identification. For frequency conversion process identification, in the conversion units 201T and 201L in FIG. 2A, when the following frequency conversion process (in the case of the polarization multiplexing transmission system) or frequency conversion amplification process (in the case of the hierarchical division multiplexing transmission system) is performed, '0' is set. When the frequency conversion process or the frequency conversion amplification process is not performed, '1' is set. This parameter is set to '1' when transmitted from a broadcasting station, for example, and may be configured to rewrite it to '0' in the conversion units 201T and 201L when the frequency conversion process or the frequency conversion amplification process is executed in the conversion units 201T and 201L. In this way, when received by the second tuner / demodulation unit 130T or the third tuner / demodulation unit 130L of the broadcast receiving apparatus 100, if the bit of the frequency conversion process identification is '0', it is possible to identify that the frequency conversion process or the like has been performed after the OFDM transmission wave has been transmitted from the broadcasting station.

[0162] In the polarization multiplexing terrestrial digital broadcast according to this embodiment, in each of a plurality of polarizations, the setting and rewriting of the frequency conversion process identification bit may be performed. For example, if neither of the two polarizations is frequency-converted by the conversion unit 201T in FIG. 2A, the frequency conversion process identification bits included in the OFDM transmission waves of both may be left as '1'. Also, if only one of the plurality of polarizations is frequency-converted by the conversion unit 201T, the frequency conversion process identification bit included in the OFDM transmission wave of the frequency-converted polarization may be rewritten to '0' in the conversion unit 201T. Further, if both of the plurality of polarizations are frequency-converted by the conversion unit 201T, the frequency conversion process identification bits included in the OFDM transmission waves of the two frequency-converted polarizations may be rewritten to '0' in the conversion unit 201T. In this way, in the broadcast receiving apparatus 100, it is possible to identify the presence or absence of frequency conversion for each polarization among the plurality of polarizations.

[0163] Note that since the frequency conversion processing identification bit is not defined in the current terrestrial digital broadcast, it will be ignored by terrestrial digital broadcast receiving apparatuses that are already in use by users. However, this bit may be introduced into a new terrestrial digital broadcast service that transmits video with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, which is an improvement over the current terrestrial digital broadcast. In this case, the first tuner / demodulator unit 130C of the broadcast receiving apparatus 100 according to the embodiment of the present invention may also be configured as a first tuner / demodulator unit corresponding to the new terrestrial digital broadcast service.

[0164] As a modification, on the premise that frequency conversion processing or frequency conversion amplification processing is performed on the OFDM transmission wave by the conversion unit 201T or the conversion unit 201L in FIG. 2A, it may be set to '0' in advance when being sent from the broadcast station. Note that when the received broadcast wave is not an advanced terrestrial digital broadcast service, this parameter may be configured to be set to '1'.

[0165] FIG. 5G shows an example of bit allocation for physical channel number identification. The physical channel number identification is composed of a 6-bit code and identifies the physical channel number (channels 13 to 52) of the received broadcast wave. If the received broadcast wave is not an advanced terrestrial digital broadcast service, this parameter is set to '111111'. The bits of the physical channel number identification are not defined in the current terrestrial digital broadcast, and in the receiving apparatus of the current terrestrial digital broadcast, the physical channel number of the broadcast wave designated by the broadcast station side cannot be obtained from a TMCC signal, an AC signal, or the like. In the broadcast receiving apparatus 100 according to an embodiment of the present invention, by using the bits of the physical channel number identification of the received OFDM transmission wave, the physical channel number set by the broadcast station side for the OFDM transmission wave can be grasped without demodulating carriers other than the TMCC signal and the AC signal. Note that the physical channels from 13ch to 52ch are pre-allocated to the frequency band of 470 to 710 MHz with a bandwidth of 6 MHz per channel. Therefore, being able to grasp the physical channel number of the OFDM transmission wave based on the bits of the physical channel number identification in the broadcast receiving apparatus 100 means that the frequency band in which the OFDM transmission wave was transmitted in the air as a terrestrial digital broadcast wave can be grasped.

[0166] In the polarization - multiplexed terrestrial digital broadcast according to this embodiment, in the generation process of the OFDM transmission wave on the broadcasting station side, the physical channel number identification bits may be arranged for each of a plurality of polarization pairs in the bandwidth originally constituting one physical channel, and the same physical number may be assigned. Here, depending on the installation environment of the broadcast receiving apparatus 100, in the conversion unit 201T of FIG. 2A, only the frequency of one of the plurality of polarizations may be converted. As a result, when the frequencies of each of the plurality of polarization pairs received by the broadcast receiving apparatus 100 are different from each other, if the broadcast receiving apparatus side cannot grasp in some way that the plurality of polarizations with different frequencies were originally a pair, the advanced terrestrial digital broadcast using both polarizations of the polarization - multiplexed terrestrial digital broadcast cannot be demodulated. Even in such a case, by using the above - mentioned physical channel number identification bits, when there are transmission waves with the same value of the physical channel number identification bits at a plurality of different frequencies in the broadcast receiving apparatus 100, it can be identified that they are the transmission waves that were transmitted as a polarization pair originally constituting one physical channel on the broadcasting station side. Thereby, it becomes possible to realize the demodulation of the advanced terrestrial digital broadcast of the polarization - multiplexed terrestrial digital broadcast by using the plurality of transmission waves showing the same value.

[0167] FIG. 5H shows an example of the bit assignment for the main signal identification. This example is an example in which the bit for the main signal identification is arranged at bit B117.

[0168] When the transmitted OFDM transmission wave is the transmission wave of the polarization - multiplexed terrestrial digital broadcast, in the TMCC information of the transmission wave transmitted by the main polarization, this parameter is set to '1'. In the TMCC information of the transmission wave transmitted by the sub - polarization, it is set to '0'. Note that the transmission wave transmitted by the main polarization refers to the polarization signal in the same polarization direction as the polarization direction used for the transmission of the current terrestrial digital broadcast service among the vertical polarization signal and the horizontal polarization signal. That is, in an area where the current terrestrial digital broadcast service uses horizontal polarization for transmission, in the polarization - multiplexed terrestrial digital broadcast service, the horizontal polarization is the main polarization and the vertical polarization is the sub - polarization. Also, in an area where the current terrestrial digital broadcast service uses vertical polarization for transmission, in the polarization - multiplexed terrestrial digital broadcast service, the vertical polarization is the main polarization and the horizontal polarization is the sub - polarization.

[0169] In the broadcast receiving apparatus 100 that receives the transmission wave of the polarization - multiplexed terrestrial digital broadcast according to the embodiment of the present invention, by using the bit for the main signal identification, it is possible to identify whether the received transmission wave was transmitted by the main polarization or the sub - polarization during transmission. For example, by using the identification process for the main polarization and the sub - polarization, during the initial scan described later, it is possible to perform the initial scan on the transmission wave transmitted by the main polarization first, and after the completion of the initial scan of the transmission wave transmitted by the main polarization, perform the initial scan of the transmission wave transmitted by the sub - polarization.

[0170] Details of the configuration example of the layer, segment, and digital broadcast service to be transmitted in the polarization - dual - use terrestrial digital broadcast according to this embodiment will be described later. However, when transmitting the current terrestrial digital broadcast service using a layer composed of segments included only in the main polarization, and when transmitting an advanced terrestrial digital broadcast service using a layer including segments included in both the main polarization and the sub - polarization, an initial scan of the transmission wave transmitted first in the main polarization may be performed first to complete the initial scan of the current terrestrial digital broadcast service, and then an initial scan of the transmission wave transmitted in the sub - polarization may be performed to perform the initial scan of the advanced terrestrial digital broadcast service. In this way, the initial scan of the advanced terrestrial digital broadcast service can be performed after the completion of the initial scan of the current terrestrial digital broadcast service, and the settings by the initial scan of the current terrestrial digital broadcast service can be reflected in the settings by the initial scan of the advanced terrestrial digital broadcast service, which is preferable. Note that the definition of the meanings of '1' and '0' of the bits for main signal identification may be reversed from the above - described explanation.

[0171] Also, instead of the bits for main signal identification, a polarization - direction identification bit may be used as one parameter of the TMCC information. Specifically, for a transmission wave transmitted in the horizontal polarization, the polarization - direction identification bit may be set to '1' on the broadcast - station side, and for a transmission wave transmitted in the vertical polarization, the polarization - direction identification bit may be set to '0' on the broadcast - station side. In the broadcast receiving apparatus 100 that receives the transmission wave of the polarization - dual - use terrestrial digital broadcast according to the embodiment of the present invention, by using the polarization - direction identification bit, it is possible to identify in which polarization direction the received transmission wave was transmitted during transmission. For example, by using the identification process of the polarization direction, during the initial scan described later, the transmission wave transmitted in the horizontal polarization can be scanned first, and after the completion of the initial scan of the transmission wave transmitted in the horizontal polarization, the transmission wave transmitted in the vertical polarization can be scanned. Since the explanation of the effect of this process can be obtained by replacing'main polarization' with 'horizontal polarization' and'sub - polarization' with'vertical polarization' in the part related to the initial scan in the above - described explanation of the bits for main signal identification, the repeated explanation is omitted. Note that the definitions of the meanings of '1' and '0' of the polarization direction identification bit may be reversed from the above description.

[0172] Alternatively, instead of the above-described main signal identification bit, a first signal second signal identification bit may be used as a parameter of the TMCC information. Specifically, one of the horizontal polarization and the vertical polarization is defined as the first polarization, the broadcast signal of the transmission wave transmitted in the first polarization is defined as the first signal, and the first signal second signal identification bit may be set to '1' on the broadcast station side. Further, the other polarization is defined as the second polarization, the broadcast signal of the transmission wave transmitted in the second polarization is defined as the second signal, and the first signal second signal identification bit may be set to '0' on the broadcast station side. In the broadcast receiving apparatus 100 that receives the transmission wave of the polarization-duplex terrestrial digital broadcast according to the embodiment of the present invention, by using the first signal second signal identification bit, it is possible to identify in which polarization direction the received transmission wave was transmitted during transmission. Note that the first signal second signal identification bit is only the concept of'main polarization' and'subordinate polarization' in the above-described definition of the main signal identification bit replaced with 'first polarization' and'second polarization', and the processing and effects in the broadcast receiving apparatus 100 are the parts related to the processing of the broadcast receiving apparatus 100 in the above-described description of the main signal identification bit. The'main polarization' may be read as 'first polarization' and the'subordinate polarization' may be read as'second polarization', so the description will be omitted again.

[0173] Note that the definitions of the meanings of '1' and '0' of the first signal second signal identification bit may be reversed from the above description.

[0174] Note that the above-described main signal identification, polarization direction identification, and first signal second signal identification are not essential when the broadcast wave is a service of the single-polarization terrestrial digital broadcast according to this embodiment or when it is not an advanced terrestrial digital broadcast service, and this parameter may be set to '1'.

[0175] Next, in the transmission wave of the hierarchical division multiplex terrestrial digital broadcast according to the present embodiment, instead of the bits for main signal identification described above, the upper and lower layer identification bits may be used as one parameter of the TMCC information. Specifically, in the TMCC information of the modulated wave transmitted in the upper layer, the above-described upper and lower layer identification bits may be set to '1', and in the TMCC information of the transmission wave transmitted in the lower layer, the above-described upper and lower layer identification bits may be set to '0'. Also, when the broadcast wave is not an advanced terrestrial digital broadcast service, this parameter may be set to '1'.

[0176] In the hierarchical division multiplex terrestrial digital broadcast according to the present embodiment, in the generation process of the OFDM transmission wave on the broadcast station side, among the plurality of modulated waves originally transmitted in the upper layer and the lower layer of one physical channel, for the lower layer, depending on the installation environment of the broadcast receiving apparatus 100, frequency conversion and signal amplification may be performed by the conversion unit 201L in FIG. 2A. In the broadcast receiving apparatus 100, when receiving the transmission wave of the hierarchical division multiplex terrestrial digital broadcast, based on the above-described upper and lower layer identification bits, it is possible to identify whether it was a modulated wave originally transmitted in the upper layer or a modulated wave transmitted in the lower layer. For example, by this identification process, the initial scan of the advanced terrestrial digital broadcast service transmitted in the lower layer can be performed after the completion of the initial scan of the current terrestrial digital broadcast service transmitted in the upper layer, and the settings by the initial scan of the current terrestrial digital broadcast service can be reflected in the settings by the initial scan of the advanced terrestrial digital broadcast service. Also, in the third tuner / demodulation unit 130L of the broadcast receiving apparatus 100, it can also be used to switch the processing between the demodulation unit 133S and the demodulation unit 133L based on the identification result.

[0177] In the description of the polarization dual transmission method in each of the following embodiments, unless otherwise specified, as an example, the case where the horizontal polarization is the main polarization and the vertical polarization is the sub-polarization will be described. However, the main and sub relationships of the horizontal polarization and the vertical polarization may be reversed. FIG. 5I shows an example of the bit assignment for 4K signal transmission layer identification.

[0178] When the broadcast wave to be transmitted is the broadcast wave of the polarization - dual terrestrial digital broadcast service according to this embodiment, the bits for identifying the 4K signal transmission layer may be used to indicate whether to use both the horizontally polarized signal and the vertically polarized signal to transmit the 4K broadcast program for each of the B - layer and the C - layer. Allocate 1 bit to each of the B - layer setting and the C - layer setting. For example, in the B - layer and the C - layer, when the bit for identifying the 4K signal transmission layer for each layer is '0', it may be set to indicate that the 4K broadcast program is transmitted using both the horizontally polarized signal and the vertically polarized signal in that layer. In the B - layer and the C - layer, when the bit for identifying the 4K signal transmission layer for each layer is '1', it may be set to indicate that the 4K broadcast program using both the horizontally polarized signal and the vertically polarized signal is not transmitted in that layer. In this way, in the broadcast receiving apparatus 100, using the bits for identifying the 4K signal transmission layer, it is possible to identify whether to use both the horizontally polarized signal and the vertically polarized signal to transmit the 4K broadcast program in each of the B - layer and the C - layer.

[0179] Also, when the broadcast wave to be transmitted is the broadcast wave of the single - polarization terrestrial digital broadcast service according to this embodiment, the bits for identifying the 4K signal transmission layer may be used to indicate whether to transmit the 4K broadcast program for each of the B - layer and the C - layer. Allocate 1 bit to each of the B - layer setting and the C - layer setting. For example, in the B - layer and the C - layer, when the bit for identifying the 4K signal transmission layer for each layer is '0', it may be set to indicate that the 4K broadcast program is transmitted in that layer. In the B - layer and the C - layer, when the bit for identifying the 4K signal transmission layer for each layer is '1', it may be set to indicate that the 4K broadcast program is not transmitted in that layer. In this way, in the broadcast receiving apparatus 100, using the bits for identifying the 4K signal transmission layer, it is possible to identify whether to transmit the 4K broadcast program in each of the B - layer and the C - layer.

[0180] Also, when the broadcast wave to be transmitted is the broadcast wave of the hierarchical division multiplex terrestrial digital broadcast service of the present embodiment, the bit for identifying the 4K signal transmission layer may indicate whether to transmit a 4K broadcast program in the lower layer. When B119 of this parameter is '0', a 4K broadcast program is transmitted in the lower layer. When B119 of this parameter is '1', a 4K broadcast program is not transmitted in the lower layer. In this way, in the broadcast receiving apparatus 100, it is possible to identify whether to transmit a 4K broadcast program in the lower layer by using the bit for identifying the 4K signal transmission layer. Note that when the broadcast wave to be transmitted is the broadcast wave of the hierarchical division multiplex terrestrial digital broadcast service of the present embodiment, B118 of this parameter may be undefined.

[0181] Note that when this parameter is '0', as a carrier modulation mapping method, in addition to the basic modulation method shown in FIG. 5E, it is possible to adopt a modulation method of NUC (Non-Uniform Constellation). In this case, it is possible to transmit the current / next information of the transmission parameter additional information regarding the B layer / C layer by using AC1 or the like.

[0182] Also, when the broadcast wave to be transmitted is not an advanced terrestrial digital broadcast service, these parameters may each be set to '1'.

[0183] Note that the definitions of '0' and '1' of the bit for identifying the 4K signal transmission layer described above may be reversed from the above description.

[0184] FIG. 5J shows an example of bit allocation for additional layer transmission identification. The bit for additional layer transmission identification may indicate whether to use it as a virtual D layer or a virtual E layer for each of the B layer and the C layer of the transmission wave transmitted in the secondary polarization when the broadcast wave to be transmitted is the polarization-duplex terrestrial digital broadcast service of the present embodiment.

[0185] For example, in the example of the figure, the bit arranged at B120 is the D-layer transmission identification bit. When this parameter is '0', the B-layer transmitted on the secondary polarization is used as the virtual D-layer. To express this precisely, among the segments transmitted on the secondary polarization, a group of segments having the same segment number as the segments belonging to the B-layer transmitted on the main polarization is treated as a D-layer, which is a layer different from the B-layer transmitted on the main polarization. When this parameter is '1', the B-layer transmitted on the secondary polarization is not used as the virtual D-layer but is used as the B-layer.

[0186] Also, for example, the bit arranged at B121 is the E-layer transmission identification bit. When this parameter is '0', the C-layer transmitted on the secondary polarization is used as the virtual E-layer. To express this precisely, among the segments transmitted on the secondary polarization, a group of segments having the same segment number as the segments belonging to the C-layer transmitted on the main polarization is treated as an E-layer, which is a layer different from the C-layer transmitted on the main polarization. When this parameter is '1', the C-layer transmitted on the secondary polarization is not used as the virtual E-layer but is used as the C-layer.

[0187] In this way, in the broadcast receiving apparatus 100, it is possible to identify the presence or absence of the D-layer and E-layer transmitted on the secondary polarization by using the additional layer transmission identification bits (D-layer transmission identification bit and / or E-layer transmission identification bit). That is, in the terrestrial digital broadcast according to the present embodiment, by using the parameter of the additional layer transmission identification shown in FIG. 5J, it is possible to operate new layers (D-layer and E-layer in the example of FIG. 5J) beyond the number of layers limited to three layers, namely, the A-layer, B-layer, and C-layer, in the current terrestrial digital broadcast.

[0188] In addition, when this parameter is '0', it is possible to vary parameters such as the carrier modulation mapping method, coding rate, and length of time interleaving shown in FIG. 5C between the virtual D layer / virtual E layer and the B layer / C layer. In this case, if the current / next information of parameters such as the carrier modulation mapping method, convolutional coding rate, and length of time interleaving for the virtual D layer / virtual E layer is transmitted using AC information (e.g., AC1), etc., the broadcast receiving apparatus 100 can grasp the parameters such as the carrier modulation mapping method, convolutional coding rate, and length of time interleaving for the virtual D layer / virtual E layer.

[0189] As a modification, when the additional layer transmission identification bits (D layer transmission identification bit and / or E layer transmission identification bit) are '0', the transmission parameters of the B layer and / or C layer of the current / next information of the TMCC information transmitted on the secondary polarization may be configured to be switched to the meaning of the transmission parameters of the virtual D layer and / or virtual E layer. In this case, when the virtual D layer and / or virtual E layer is used, on the main polarization, the A layer, B layer, and C layer are used, and the transmission parameters of these layers may be transmitted using the current / next information of the TMCC information transmitted on the main polarization. Also, on the secondary polarization, the A layer, D layer, and E layer are used, and the transmission parameters of these layers may be transmitted using the current / next information of the TMCC information transmitted on the secondary polarization. Even in this case, the broadcast receiving apparatus 100 can grasp the parameters such as the carrier modulation mapping method, convolutional coding rate, and length of time interleaving for the virtual D layer / virtual E layer.

[0190] Further, when the broadcast wave to be transmitted is not an advanced terrestrial digital broadcast service, or even if it is an advanced terrestrial digital broadcast service but is a single polarization transmission method or a hierarchical division multiplexing transmission method, this parameter may be configured to be set to '1' respectively.

[0191] Note that the parameters for additional layer transmission identification may be stored in both the TMCC information of the main polarization and the TMCC information of the sub - polarization. However, as long as they are stored in at least the TMCC information of the sub - polarization, all of the above - mentioned processes can be realized.

[0192] Also, the definitions of '0' and '1' for the bits of the additional layer transmission identification described above may be reversed from the above - mentioned description.

[0193] Note that when the above - mentioned parameters for 4K signal transmission layer identification indicate that 4K broadcast programs are transmitted in the B layer, even if the above - mentioned D - layer transmission identification bit indicates that the B layer is used as a virtual D layer, the broadcast receiving apparatus 100 may ignore the D - layer transmission identification bit. Similarly, when the parameters for 4K signal transmission layer identification indicate that 4K broadcast programs are transmitted in the C layer, even if the E - layer transmission identification bit indicates that the C layer is used as a virtual E layer, the broadcast receiving apparatus 100 may be configured to ignore the E - layer transmission identification bit. By clarifying the priority order of the bits used in the determination process in this way, conflicts in the determination process in the broadcast receiving apparatus 100 can be prevented.

[0194] Also, in the broadcast wave to be transmitted, the bits such as the frequency conversion process identification bit, the physical channel number identification bit, the main signal identification bit, the 4K signal transmission identification bit, and the additional layer transmission identification bit should generally be set to '1' for all bits when the above - mentioned system identification parameter is not '10'. Even if the system identification parameter is not '10', but due to some problems, exceptionally, when the frequency conversion process identification bit, the physical channel number identification bit, the main signal identification bit, the 4K signal transmission identification bit, or the additional layer transmission identification bit is not '1', the broadcast receiving apparatus 100 may be configured to ignore the bit that is not '1' and determine that all of these bits are '1'.

[0195] FIG. 5K shows an example of the assignment of the 'coding rate' bits shown in FIG. 5C, that is, the bits for identifying the coding rate of error correction.

[0196] Here, in the current terrestrial digital broadcasting system for 2K broadcasting, identification bits for transmitting the coding rate dedicated to the "convolutional code" are transmitted. However, in the digital broadcasting according to this embodiment, the advanced terrestrial digital broadcasting service for 4K broadcasting can be broadcast in a mixed manner with the terrestrial digital broadcasting service for 2K broadcasting. And as already described, in the advanced terrestrial digital broadcasting service for 4K broadcasting, an LDPC code can be used as the inner code.

[0197] Therefore, unlike the current terrestrial digital broadcasting system for 2K broadcasting, the error correction coding rate identification bit according to this embodiment shown in FIG. 5K is not a coding rate identification bit dedicated to the convolutional code, but is configured to also support the LDPC code.

[0198] Here, whether the inner code of the target terrestrial digital broadcasting service is a convolutional code or an LDPC code, by setting the bits arranged in the common range as the identification bits for coding rate transmission, savings in the number of bits can be achieved. Furthermore, even for the same identification bit, by independently setting the coding rate when the inner code of the target terrestrial digital broadcasting service is a convolutional code and when it is an LDPC code, as a digital broadcasting system, a group of coding rate options suitable for each coding method can be adopted.

[0199] Specifically, in the example of FIG. 5K, when the identification bit is '000', if the inner code is a convolutional code, the coding rate is 1 / 2, and if the inner code is an LDPC code, the coding rate is 2 / 3. When the identification bit is '001', if it is a convolutional code, the coding rate is 2 / 3, and if the inner code is an LDPC code, the coding rate is 3 / 4. When the identification bit is '010', if the inner code is a convolutional code, the coding rate is 3 / 4, and if the inner code is an LDPC code, the coding rate is 5 / 6. When the identification bit is '011', if the inner code is a convolutional code, the coding rate is 5 / 6, and if the inner code is an LDPC code, the coding rate is 2 / 16. When the identification bit is '100', if the inner code is a convolutional code, the coding rate is 7 / 8, and if the inner code is an LDPC code, the coding rate is 6 / 16. When the identification bit is '101', if the inner code is a convolutional code, it is undefined, and if the inner code is an LDPC code, the coding rate is 10 / 16. When the identification bit is '110', if the inner code is a convolutional code, it is undefined, and if the inner code is an LDPC code, the coding rate is 14 / 16. If there is no unused layer or next information, '111' is set for this parameter. Note that the above coding rate 2 / 3 may be replaced by the coding rate 81 / 120. The coding rate 3 / 4 may be replaced by the coding rate 89 / 120. The coding rate 5 / 6 may be replaced by the coding rate 101 / 120. Also, coding rates such as 8 / 16 and 12 / 16 may be assigned.

[0200] Note that the identification of whether the inner code of the target terrestrial digital broadcast service is a convolutional code or an LDPC code may be performed using the result of identifying whether the terrestrial digital broadcast service is a current terrestrial digital broadcast service or an advanced terrestrial digital broadcast service. This identification may be performed using the identification bits described in FIG. 5D or FIG. 5I. Here, if the target terrestrial digital broadcast service is a current terrestrial digital broadcast service, it may be identified that the inner code is a convolutional code. Also, if the target terrestrial digital broadcast service is an advanced terrestrial digital broadcast service, it may be identified that the inner code is an LDPC code.

[0201] Also, as another example of identifying whether the inner code of the target terrestrial digital broadcast service is a convolutional code or an LDPC code, it may be identified based on the identification bit of the error correction method, which will be described later with reference to FIG. 6I.

[0202] According to the bits for identifying the coding rate of error correction shown in FIG. 5K described above, it is possible to prevent an increase in the number of bits of the identification bits while corresponding to a plurality of inner code methods, which is preferable.

[0203] Also, in the advanced terrestrial digital broadcast service using the polarization multiplexing transmission method, the TMCC information of the transmission wave transmitted in the horizontal polarization and the TMCC information of the transmission wave transmitted in the vertical polarization may be the same or different. Similarly, in the advanced terrestrial digital broadcast service using the hierarchical division multiplexing transmission method, the TMCC information of the transmission wave transmitted in the upper layer and the TMCC information of the transmission wave transmitted in the lower layer may be the same or different. Further, the above-described parameters for identifying frequency conversion processing, parameters for identifying the main signal, additional layer transmission identification, etc. may be described only in the TMCC information of the transmission wave transmitted in the sub-polarization or the transmission wave transmitted in the lower layer.

[0204] In the above description, an example in which the parameters for identifying frequency conversion processing, the parameters for identifying the main signal, the parameters for identifying the polarization direction, the parameters for identifying the first signal and the second signal, the parameters for identifying the upper and lower layers, the parameters for identifying the 4K signal transmission layer, and the parameters for identifying additional layer transmission are included in the TMCC signal (TMCC carrier) and transmitted has been described. However, these parameters may be included in the AC signal (AC carrier) and transmitted. That is, these parameters may be transmitted by a signal of a carrier (such as a TMCC carrier or an AC carrier) modulated by a modulation method that performs mapping with a smaller number of states than the modulation method of the data carrier.

[0205] [AC signal] The AC signal is an additional information signal related to broadcasting, such as additional information regarding the transmission control of the modulated wave or earthquake early warning information. Note that the earthquake early warning information is transmitted using the AC carrier of segment 0. On the other hand, the additional information regarding the transmission control of the modulated wave can be transmitted using any AC carrier. FIG. 6A shows an example of the bit allocation of the AC signal. The AC signal is composed of 204 bits (B0 to B203). B0 is a demodulation reference signal for the AC symbol and has a predetermined amplitude and phase reference. B1 to B3 are signals for identifying the configuration of the AC signal. B4 to B203 are used for transmitting the additional information regarding the transmission control of the modulated wave or the earthquake early warning information.

[0206] FIG. 6B shows an example of the bit allocation for identifying the configuration of the AC signal. When transmitting earthquake early warning information using B4 to B203 of the AC signal, this parameter is set to '001' or '110'. The configuration identification parameter ('001' or '110') when transmitting earthquake early warning information has the same code as the first 3 bits (B1 to B3) of the synchronization signal of the TMCC signal, and is alternately sent frame by frame at the same timing as the TMCC signal. Also, when this parameter has a value other than the above, it indicates that the additional information regarding the transmission control of the modulated wave is being transmitted using B4 to B203 of the AC signal. In this case, the configuration identification parameters of the AC signal are alternately sent frame by frame as '000' and '111', or '010' and '101', or '011' and '100'.

[0207] B4 to B203 of the AC signal are used for transmitting the additional information regarding the transmission control of the modulated wave or the earthquake early warning information.

[0208] The transmission of additional information related to the transmission control of a modulated wave may be performed with various bit configurations. For example, frequency conversion process identification, physical channel number identification, main signal identification, 4K signal transmission layer identification, additional layer transmission identification, etc., described in the explanation of the TMCC signal, may be used to allocate bits to the additional information related to the transmission control of the modulated wave of the AC signal and transmit it instead of or in addition to the TMCC signal. By doing so, in the broadcast receiving apparatus 100, various identification processes already described in the explanation of the TMCC signal can be performed using these parameters. Also, transmission parameter additional information related to the transmission layer of a 4K broadcast program when any of the parameters of the 4K signal transmission layer identification is '0', or current / next information of the transmission parameters related to the virtual D layer / virtual E layer when any of the parameters of the additional layer transmission identification is '0', may be allocated. By doing so, in the broadcast receiving apparatus 100, the transmission parameters of each layer can be acquired using these parameters, and the demodulation process of each layer can be controlled.

[0209] The transmission of seismic motion warning information may be performed according to the bit assignment shown in FIG. 6C. The seismic motion warning information is composed of a synchronization signal, a start / end flag, an update flag, signal identification, seismic motion warning detailed information, CRC, parity bits, etc. The synchronization signal is composed of a 13-bit code and has the same code as the 13 bits (B4 to B16) excluding the first 3 bits of the synchronization signal of the TMCC signal. When the configuration identification of the AC signal indicates that the seismic motion warning information is to be transmitted, the 16-bit code combining the configuration identification and the synchronization signal becomes the same 16-bit synchronization word as the synchronization signal of the TMCC. The start / end flag is a flag for the start timing / end timing of the seismic motion warning information and is composed of a 2-bit code. The start / end flag is changed from '11' to '00' at the start of the transmission of the seismic motion warning information and is changed from '00' to '11' at the end of the transmission of the seismic motion warning information. The update flag is composed of a 2-bit code and is incremented by 1 with '00' as the initial value each time a change occurs in the content of a series of seismic motion warning detailed information transmitted when the start / end flag is '00'. It is assumed that the next of '11' returns to '00'. When the start / end flag is '11', the update flag also becomes '11'.

[0210] FIG. 6D shows an example of the bit assignment of the signal identification. The signal identification is composed of a 3-bit code and is used to identify the type of the seismic motion warning detailed information. When this parameter is '000', it means 'Seismic motion warning detailed information (with the affected area)'. When this parameter is '001', it means 'Seismic motion warning detailed information (without the affected area)'. When this parameter is '010', it means 'Test signal of the seismic motion warning detailed information (with the affected area)'. When this parameter is '011', it means 'Test signal of the seismic motion warning detailed information (without the affected area)'. When this parameter is '111', it means 'No seismic motion warning detailed information'. Note that when the start / end flag is '00', the signal identification becomes '000' or '001' or '010' or '011'. When the start / end flag is '11', the signal identification becomes '111'.

[0211] The earthquake motion warning detailed information is composed of an 88-bit code. When the signal identification is '000', '001', '010', or '011', the earthquake motion warning detailed information transmits information regarding the current time when the earthquake motion warning information is sent, information indicating the area targeted by the earthquake motion warning, information such as the latitude / longitude / magnitude of the earthquake epicenter targeted by the earthquake motion warning, etc. An example of the bit allocation of the earthquake motion warning detailed information when the signal identification is '000', '001', '010', or '011' is shown in FIG. 6E. Also, when the signal identification is '111', it is possible to transmit a code for identifying a broadcaster, etc., using the bits of the earthquake motion warning detailed information. An example of the bit allocation of the earthquake motion warning detailed information when the signal identification is '111' is shown in FIG. 6F.

[0212] The CRC is a code generated using a predetermined generating polynomial for B21 to B111 among the earthquake motion warning information. The parity bit is a code generated by a shortened code (187, 105) of a difference set cyclic code (273, 191) for B17 to B121 among the earthquake motion warning information.

[0213] In the broadcast receiving device 100, it is possible to perform various controls for coping with an emergency using the parameters related to the earthquake motion warning described in FIGS. 6C, 6D, 6E, and 6F. For example, it is possible to perform presentation control of information related to the earthquake motion warning, control to switch the display content with a low priority to the display related to the earthquake motion warning, control to end the display of the application and switch to the display related to the earthquake motion warning or the broadcast program video, etc.

[0214] FIG. 6G shows an example of bit allocation of additional information related to transmission control of a modulated wave. The additional information related to transmission control of a modulated wave is composed of a synchronization signal, current information, next information, parity bits, and the like. The synchronization signal is composed of a 13-bit code and has the same code as the 13 bits (B4 to B16) excluding the first 3 bits of the synchronization signal of the TMCC signal. The synchronization signal does not necessarily have the same code as the 13 bits (B4 to B16) excluding the first 3 bits of the synchronization signal of the TMCC signal. When the configuration identification of the AC signal indicates that it transmits additional information related to transmission control of a modulated wave, the 16-bit code combining the configuration identification and the synchronization signal becomes a 16-bit synchronization word conforming to the synchronization signal of TMCC. It may be a 16-bit synchronization word different from the synchronization signal of TMCC. The current information indicates the current information of the transmission parameter additional information when transmitting a 4K broadcast program in the B layer or the C layer, or the transmission parameters related to the virtual D layer or the virtual E layer. The next information indicates the information after switching of the transmission parameter additional information when transmitting a 4K broadcast program in the B layer or the C layer, or the transmission parameters related to the virtual D layer or the virtual E layer.

[0215] In the example of FIG. 6G, B18 to B30 of the current information are the current information of the B-layer transmission parameter additional information, indicating the current information of the transmission parameter additional information when transmitting a 4K broadcast program in the B layer. Also, B31 to B43 of the current information are the current information of the C-layer transmission parameter additional information, indicating the current information of the transmission parameter additional information when transmitting a 4K broadcast program in the C layer. Further, B70 to B82 of the next information are the information after the switching of the transmission parameters of the B-layer transmission parameter additional information, indicating the information after the switching of the transmission parameters of the transmission parameter additional information when transmitting a 4K broadcast program in the B layer. Also, B83 to B95 of the next information are the information after the switching of the transmission parameters of the C-layer transmission parameter additional information, indicating the information after the switching of the transmission parameters of the transmission parameter additional information when transmitting a 4K broadcast program in the C layer. Here, the transmission parameter additional information is the transmission parameter related to modulation that extends the specification by adding to the transmission parameters of the TMCC information shown in FIG. 5C. The specific content of the transmission parameter additional information will be described later.

[0216] In the example of FIG. 6G, B44 to B56 of the current information are the current information of the transmission parameters for the virtual D layer when the virtual D layer is in operation. B57 to B69 of the current information are the current information of the transmission parameters for the virtual E layer when the virtual E layer is in operation. Also, B96 to B108 of the next information are the information after the switching of the transmission parameters for the virtual D layer when the virtual D layer is in operation. B109 to B121 of the current information are the information after the switching of the transmission parameters for the virtual E layer when the virtual E layer is in operation. The parameters stored in the transmission parameters for the virtual D layer and the transmission parameters for the virtual E layer may be the same as those shown in FIG. 5C.

[0217] The virtual D layer and the virtual E layer are layers that do not exist in the current terrestrial digital broadcast. Since the TMCC information in FIG. 5B needs to maintain compatibility with the current terrestrial digital broadcast, it is not easy to increase the number of bits. Therefore, in an embodiment of the present invention, the transmission parameters for the virtual D layer and the virtual E layer are stored not in the TMCC information but in the AC information as shown in FIG. 6G.

[0218] Thereby, while maintaining the compatibility of the TMCC information with the current terrestrial digital broadcast, it becomes possible to transmit information regarding modulation for the new virtual D layer and virtual E layer to the receiving device. Thereby, in the broadcast wave of the polarization - dual - use terrestrial digital broadcast service according to this embodiment, when the B layer / C layer of the transmission wave transmitted on the secondary polarization is used as the virtual D layer / virtual E layer, it becomes possible to set the transmission parameters of the virtual D layer / virtual E layer of the transmission wave transmitted on the secondary polarization to be different from the transmission parameters of the B layer / C layer of the transmission wave transmitted on the main polarization.

[0219] In addition, when the virtual D layer or the virtual E layer is not used, the information on the transmission parameters for the unused layer can be ignored without problems in the broadcast receiving device 100. For example, for the virtual D layer or the virtual E layer, when the additional layer transmission identification parameter of the TMCC information in FIG. 5J indicates '1' (indicating that the virtual D layer / virtual E layer is not used), the broadcast receiving device 100 may be configured to ignore any value in the transmission parameters shown in FIG. 6G for the unused virtual D layer or virtual E layer. Next, the details of the transmission parameter addition information described in FIG. 6G will be described.

[0220] FIG. 6H shows a specific example of the transmission parameter addition information. The transmission parameter addition information can include parameters of the error correction method, parameters of the constellation format, and the like.

[0221] The error correction method indicates the setting of what coding method to use as the error correction method for the inner code and the outer code when transmitting a 4K broadcast program (advanced terrestrial digital broadcast service) in the B layer or the C layer. FIG. 6I shows an example of the bit allocation of the error correction method. When this parameter is '000', a convolutional code is used as the inner code and a shortened RS code is used as the outer code when transmitting a 4K broadcast program in the B layer or the C layer. When this parameter is '001', an LDPC code is used as the inner code and a BCH code is used as the outer code when transmitting a 4K broadcast program in the B layer or the C layer. Further, other combinations may be set and selected.

[0222] Also, when transmitting a 4K broadcast program in the B layer or the C layer, it is possible to adopt not only a uniform constellation but also a non-uniform constellation (Non Uniform Constellation: NUC) as the carrier modulation mapping method. FIG. 6J shows an example of the bit allocation of the constellation format. When this parameter is '000', the carrier modulation mapping method selected by the transmission parameter of the TMCC information is applied with a uniform constellation. When this parameter is any one of '001' to '111', the carrier modulation mapping method selected by the transmission parameter of the TMCC information is applied with a non-uniform constellation. Note that when applying a non-uniform constellation, the optimal value of the non-uniform constellation differs according to the type of the error correction method and its coding rate, etc. Therefore, when the parameter of the constellation format is any one of '001' to '111', the broadcast receiving apparatus 100 of this embodiment may determine the non-uniform constellation used in the demodulation process based on the parameter of the carrier modulation mapping method, the parameter of the error correction method, and the parameter of its coding rate. The determination may be made by referring to a predetermined table stored in advance in the broadcast receiving apparatus 100.

[0223] [Transmission Method 1 of Advanced Terrestrial Digital Broadcast Service] In order to realize 4K (horizontal 3,840 pixels × vertical 2,160 pixels) broadcasting while maintaining the viewing environment of the current terrestrial digital broadcasting service, as an example of the transmission method of the advanced terrestrial digital broadcasting service according to an embodiment of the present invention, a polarization - dual transmission method will be described. The polarization - dual transmission method according to an embodiment of the present invention is a method that shares some specifications with the current terrestrial digital broadcasting method. For example, 13 segments within a bandwidth of approximately 6 MHz corresponding to one physical channel are divided. 7 segments are used for transmitting 2K (horizontal 1,920 pixels × vertical 1,080 pixels) broadcast programs, 5 segments are used for transmitting 4K broadcast programs, and 1 segment is used for mobile reception (so - called one - segment broadcasting). Further, for the 5 segments for 4K broadcasting, not only horizontal polarization signals but also vertical polarization signals are used, and a total transmission capacity of 10 segments is ensured by MIMO (Multiple - Input Multiple - Output) technology. Note that for 2K broadcast programs, image quality is maintained by optimizing the latest MPEG - 2 Video compression technology, etc., and reception is possible with a current TV receiver. For 4K broadcast programs, image quality is ensured by optimizing the more efficient HEVC compression technology than MPEG - 2 Video and increasing the modulation level. Note that the number of segments allocated for each broadcast may be different from that described above.

[0224] FIG. 7A shows an example of the polarization - dual transmission method in the advanced terrestrial digital broadcasting service according to an embodiment of the present invention. A frequency band of 470 - 710 MHz is used for transmitting the broadcast wave of the terrestrial digital broadcasting service. The number of physical channels in the frequency band is 40 channels from 13 to 52ch, and each physical channel has a bandwidth of 6 MHz. In the polarization - dual transmission method according to an embodiment of the present invention, both horizontal polarization signals and vertical polarization signals are used within one physical channel.

[0225] FIG. 7A shows two examples (1) and (2) of the allocation of 13 segments. In the example of (1), the segments 1 to 7 (B layer) of the horizontally polarized signal are used to transmit a 2K broadcast program. A total of 10 segments, namely the segments 8 to 12 (C layer) of the horizontally polarized signal and the segments 8 to 12 (C layer) of the vertically polarized signal, are used to transmit a 4K broadcast program. The segments 1 to 7 (B layer) of the vertically polarized signal may be used to transmit the same broadcast program as the 2K broadcast program transmitted by the segments 1 to 7 (B layer) of the horizontally polarized signal. Or, the segments 1 to 7 (B layer) of the vertically polarized signal may be used to transmit a broadcast program different from the 2K broadcast program transmitted by the segments 1 to 7 (B layer) of the horizontally polarized signal. Or, in the segments 1 to 7 (B layer) of the vertically polarized signal, it may be used for other data transmission or may not be used. The identification information on how to use the segments 1 to 7 (B layer) of the vertically polarized signal can be transmitted to the receiving device side by the parameters such as the 4K signal transmission layer identification of the TMCC signal and the additional layer transmission identification already described. In the broadcast receiving device 100, these parameters can be used to identify the handling of the segments 1 to 7 (B layer) of the vertically polarized signal. Also, the 2K broadcast program transmitted using the B layer of the horizontally polarized signal and the 4K broadcast program transmitted using the C layer of the horizontal / vertical polarized signals may be simulcast that transmits the same content broadcast program at different resolutions, or may transmit different content broadcast programs. The segment 0 of the horizontal / vertical polarized signals is used to transmit the same one-segment broadcast program.

[0226] The example of (2) in Fig. 7A is a variant different from (1). In the example of (2), a total of 10 segments, namely segments 1 to 5 (B layer) of the horizontally polarized signal and segments 1 to 5 (B layer) of the vertically polarized signal, are used to transmit a 4K broadcast program. Segments 6 to 12 (C layer) of the horizontally polarized signal are used to transmit a 2K broadcast program. Also in the example of (2), segments 6 to 12 (C layer) of the vertically polarized signal may be used to transmit the same broadcast program as the 2K broadcast program transmitted by segments 6 to 12 (C layer) of the horizontally polarized signal. Segments 6 to 12 (C layer) of the vertically polarized signal may be used to transmit a broadcast program different from the 2K broadcast program transmitted by segments 6 to 12 (C layer) of the horizontally polarized signal. Further, segments 6 to 12 (C layer) of the vertically polarized signal may be used for other data transmission or may not be used. Since these identification information are the same as those in the example of (1), the description will not be repeated.

[0227] Note that the examples of (1) and (2) in Fig. 7A both illustrate the cases where the horizontal polarization is the main polarization. However, depending on the operation, the horizontal polarization and the vertical polarization may be reversed.

[0228] Fig. 7B shows an example of the configuration of a broadcast system for an advanced terrestrial digital broadcast service using the polarization-duplex transmission method according to an embodiment of the present invention. This shows both the transmission-side system and the reception-side system of the advanced terrestrial digital broadcast service using the polarization-duplex transmission method. The configuration of the broadcast system for the advanced terrestrial digital broadcast service using the polarization-duplex transmission method is basically the same as the configuration of the broadcast system shown in Fig. 1, but the radio tower 300T, which is equipment of the broadcast station, is a polarization-sharing transmission antenna capable of simultaneously transmitting a horizontally polarized signal and a vertically polarized signal. Also in the example of Fig. 7B, only the station selection / detection unit 131H and the station selection / detection unit 131V of the second tuner / demodulation unit 130T of the broadcast receiver 100 are excerpted and described, and the description of other operation units is omitted.

[0229] The horizontally polarized signal transmitted from the radio tower 300T is received by the horizontally polarized receiving element of the antenna 200T, which is a polarization - sharing receiving antenna, and is input from the connector part 100F1 to the station - selection / detection part 131H via the coaxial cable 202T1. On the other hand, the vertically polarized signal transmitted from the radio tower 300T is received by the vertically polarized receiving element of the antenna 200T and is input from the connector part 100F2 to the station - selection / detection part 131V via the coaxial cable 202T2. It is common to use F - type connectors for the connector parts that connect the antenna (coaxial cable) and the TV receiver.

[0230] Here, there is also a possibility that the user may accidentally connect the coaxial cable 202T1 to the connector part 100F2 and the coaxial cable 202T2 to the connector part 100F1. In this case, problems such as the station - selection / detection part 131H and the station - selection / detection part 131V being unable to identify whether the input broadcast signal is a horizontally polarized signal or a vertically polarized signal may occur. In order to prevent the above - mentioned problems, one of the connector parts that connect the antenna (coaxial cable) and the TV receiver, for example, the connector part of the coaxial cable 202T2 and the connector part 100F2 that transmit the vertically polarized signal, may be made into a connector part with a shape different from the F - type connector of the coaxial cable 202T1 and the connector part 100F1 that transmit the horizontally polarized signal. Or, the station - selection / detection part 131H and the station - selection / detection part 131V may be controlled to operate by identifying whether the input broadcast signal is a horizontally polarized signal or a vertically polarized signal by referring to the main signal identification of the TMCC information of each input signal. Also, instead of the two coaxial cables 202T1 and 202T2, the antenna 200T and the broadcast receiving device 100 may be connected by a single multi - core coaxial cable.

[0231] FIG. 7C shows an example of a configuration different from the above-described configuration of a broadcast system for an advanced terrestrial digital broadcast service using the polarization - dual - use transmission method according to an embodiment of the present invention. In the configuration shown in FIG. 7B, where the broadcast receiving apparatus 100 is provided with two broadcast signal input connectors and two coaxial cables are used for connecting the antenna 200T and the broadcast receiving apparatus 100, this configuration may not always be suitable in terms of equipment cost and handling during cable wiring. Therefore, in the configuration shown in FIG. 7C, the horizontal polarization signal received by the horizontal polarization receiving element of the antenna 200T and the vertical polarization signal received by the vertical polarization receiving element of the antenna 200T are input to a conversion unit (converter) 201T, and the connection between the conversion unit 201T and the broadcast receiving apparatus 100 is made with a single coaxial cable 202T3. The broadcast signal input from the connector unit 100F3 is split and input to the station - selection / detection unit 131H and the station - selection / detection unit 131V. The connector unit 100F3 may have a function of supplying operating power to the conversion unit 201T.

[0232] The conversion unit 201T may belong to the equipment in the environment (such as an apartment house, etc.) where the broadcast receiving apparatus 100 is installed. Or, it may be configured as an apparatus integrated with the antenna 200T and installed in a house or the like. The conversion unit 201T performs frequency - conversion processing on either the horizontal polarization signal received by the horizontal polarization receiving element of the antenna 200T or the vertical polarization signal received by the vertical polarization receiving element of the antenna 200T. By this processing, the horizontal polarization signal and the vertical polarization signal transmitted from the radio tower 300T to the antenna 200T using the horizontal polarization and vertical polarization in the same frequency band are separated into different frequency bands from each other, and can be simultaneously transmitted to the broadcast receiving apparatus 100 through a single coaxial cable 202T3. If necessary, frequency - conversion processing may be performed on both the horizontal polarization signal and the vertical polarization signal, but in this case, the frequency bands of the two after frequency - conversion must also be different from each other. Also, the broadcast receiving apparatus 100 only needs to be provided with one broadcast signal input connector unit 100F3.

[0233] FIG. 7D shows an example of frequency conversion processing. In this example, frequency conversion processing is performed on the vertically polarized signal. Specifically, among the horizontally polarized signal and the vertically polarized signal transmitted in the frequency band of 470 to 710 MHz (the band corresponding to channels 13 to 52 of UHF), the frequency band of the vertically polarized signal is converted from the frequency band of 470 to 710 MHz to the frequency band of 770 to 1010 MHz. By this processing, signals transmitted using the horizontally polarized wave and the vertically polarized wave in the same frequency band can be simultaneously transmitted to the broadcast receiving apparatus 100 through a single coaxial cable 202T3 without interfering with each other. Note that frequency conversion processing may be performed on the horizontally polarized signal.

[0234] Also, it is preferable that the frequency conversion processing is performed on the signal transmitted in the secondary polarization according to the result of referring to the main signal identification of the TMCC information. As described with reference to FIG. 5H, the signal transmitted in the main polarization is more likely to include the current terrestrial digital broadcast service and be transmitted than the signal transmitted in the secondary polarization. Therefore, in order to more suitably maintain compatibility with the current terrestrial digital broadcast service, it can be said that it is preferable to perform frequency conversion on the signal transmitted in the secondary polarization without frequency conversion of the signal transmitted in the main polarization.

[0235] Also, when performing frequency conversion on the signal transmitted in the secondary polarization, it is desirable that in the converted signal, the frequency band of the signal transmitted in the secondary polarization is higher than the frequency band of the signal transmitted in the main polarization. Thereby, in the initial scan of the broadcast receiving apparatus 100, if the scan starts from the low frequency side and proceeds to the high frequency side, the initial scan can be performed on the signal transmitted in the main polarization earlier than the signal transmitted in the secondary polarization. Thereby, processing such as reflecting the setting by the initial scan of the current terrestrial digital broadcast service in the setting by the initial scan of the advanced terrestrial digital broadcast service can be performed more suitably.

[0236] Also, the frequency conversion process may be performed for all physical channels used in the advanced terrestrial digital broadcasting service, or may be performed only for physical channels using signal transmission by the polarization multiplexing transmission method.

[0237] Note that the frequency band after conversion by the frequency conversion process is preferably between 710 and 1032 MHz. That is, when attempting to receive the terrestrial digital broadcasting service and the BS / CS digital broadcasting service simultaneously, it is conceivable to mix the broadcast signal of the terrestrial digital broadcasting service received by the antenna 200T and the broadcast signal of the BS / CS digital broadcasting service received by the antenna 200B and transmit them to the broadcast receiving apparatus 100 through a single coaxial cable. In this case, since the BS / CS-IF signal uses a frequency band of about 1032 to 2150 MHz, if the frequency band after conversion by the frequency conversion process is set to be between 710 and 1032 MHz, it is possible to avoid interference between the horizontal polarization signal and the vertical polarization signal, and also avoid interference between the broadcast signal of the terrestrial digital broadcasting service and the broadcast signal of the BS / CS digital broadcasting service. Further, considering the reception of the retransmission broadcast signal by a cable television (Community Antenna TV or Cable TV: CATV) station, etc., since a frequency band of 770 MHz or less (a band corresponding to channel 62 or less of UHF) is used in the television broadcast distribution by the cable television station, it is more preferable to set the frequency band after conversion by the frequency conversion process to be between 770 and 1032 MHz, which exceeds the band corresponding to channel 62 of UHF.

[0238] Also, the bandwidth of the region (part a in the figure) between the frequency band before conversion and the frequency band after conversion by the frequency conversion process is preferably set to be an integer multiple of the bandwidth (6 MHz) of one physical channel. By doing so, in the broadcast receiving apparatus 100, there are advantages such as facilitating frequency setting control when performing a frequency scan collectively on the broadcast signal in the frequency band before conversion and the broadcast signal in the frequency band after conversion by the frequency conversion process.

[0239] Note that, as described above, in the polarization - dual transmission method according to the embodiment of the present invention, both a horizontal - polarization signal and a vertical - polarization signal are used for transmitting a 4K broadcast program. Therefore, in order to correctly reproduce a 4K broadcast program, on the receiving side, it is necessary to correctly grasp the combination of the physical channels of the broadcast signal transmitted with horizontal polarization and the broadcast signal transmitted with vertical polarization. Even when frequency - conversion processing is performed and the broadcast signal transmitted with horizontal polarization and the broadcast signal transmitted with vertical polarization for the same physical channel are input to the receiving device as signals in different frequency bands, in the broadcast receiving device 100 of this embodiment, by appropriately referring to the parameters of the TMCC information shown in FIGS. 5F to 5J (for example, main - signal identification and physical - channel - number identification), it is possible to correctly grasp the combination of the broadcast signal transmitted with horizontal polarization and the broadcast signal transmitted with vertical polarization for the same physical channel. Thereby, the broadcast receiving device 100 of this embodiment can preferably receive, demodulate, and reproduce a 4K broadcast program.

[0240] Note that all of the examples in FIGS. 7B, 7C, and 7D illustrate the case where the horizontal polarization is the main polarization. However, depending on the operation, the horizontal polarization and the vertical polarization may be reversed.

[0241] Note that the broadcast wave of the terrestrial digital broadcast transmitted by the polarization - dual transmission method described above can be received and reproduced by the second tuner / demodulation unit 130T of the broadcast receiving device 100 as described above, but can also be received by the first tuner / demodulation unit 130C of the broadcast receiving device 100. When the broadcast wave of the terrestrial digital broadcast is received by the first tuner / demodulation unit 130C, among the broadcast signals of the broadcast wave of the terrestrial digital broadcast, the broadcast signal transmitted in the layer of the advanced terrestrial digital broadcast service is ignored, but the broadcast signal transmitted in the layer of the current terrestrial digital broadcast service is reproduced.

[0242] <Pass - through Transmission Method of Advanced Terrestrial Digital Broadcast Service> The broadcast receiving apparatus 100 is capable of receiving a signal transmitted by a pass-through transmission method. The pass-through transmission method is a method in which a broadcast signal received by a cable television station or the like is transmitted to a CATV distribution system in the same signal format, at the same frequency or after frequency conversion.

[0243] The pass-through method includes: (1) a method in which the transmission signal band of each terrestrial digital broadcast signal output from a terrestrial wave receiving antenna is extracted and level-adjusted, and then transmitted to a CATV facility at the same frequency as the transmission signal frequency; and (2) a method in which the transmission signal band of each terrestrial digital broadcast signal output from a terrestrial wave receiving antenna is extracted and level-adjusted, and then transmitted to a CATV facility at a frequency in the VHF band, MID band, SHB band, or UHF band set by the CATV facility administrator. The device constituting the receiving amplifier for performing the signal processing of the first method or the devices constituting the receiving amplifier and frequency converter for performing the signal processing of the second method are OFDM signal processors (OFDM Signal Processor: OFDM-SP).

[0244] FIG. 7E shows an example of a system configuration when the first method of the pass-through transmission method is applied to an advanced terrestrial digital broadcast service of a polarization multiplexing transmission method. FIG. 7E shows the head-end facility 400C of a cable television station and the broadcast receiving apparatus 100. Further, FIG. 7F shows an example of the frequency conversion process at that time. The notation (H·V) in FIG. 7F indicates a state of a broadcast signal in which both a broadcast signal transmitted with horizontal polarization and a broadcast signal transmitted with vertical polarization exist in the same frequency band, the notation (H) indicates a broadcast signal transmitted with horizontal polarization, and the notation (V) indicates a broadcast signal transmitted with vertical polarization. The notations in FIGS. 7H and 7I hereinafter have the same meaning.

[0245] For the dual-polarization transmission method of the digital terrestrial television broadcasting service according to the embodiment of the present invention, when applying the pass-through transmission of the first method, for the broadcast signal transmitted in the horizontal polarization, signal band extraction and level adjustment are performed in the head-end facility 400C of the cable television station, and transmission is performed at the same frequency as the transmission signal frequency. On the other hand, for the broadcast signal transmitted in the vertical polarization, signal band extraction and level adjustment are performed in the head-end facility 400C of the cable television station, and after performing frequency conversion processing similar to the description of FIG. 7D (processing of converting the broadcast signal transmitted in the vertical polarization to a frequency band higher than the frequency band of 470 to 770 MHz corresponding to channels 13 to 62 of UHF), transmission is performed. By this processing, the frequency bands of the broadcast signal transmitted in the horizontal polarization and the broadcast signal transmitted in the vertical polarization do not overlap, so that signal transmission can be performed using a single coaxial cable (or optical fiber cable). The transmitted signal can be received by the broadcast receiving apparatus 100 of the present embodiment. In the broadcast receiving apparatus 100 of the present embodiment, the process of receiving and demodulating the broadcast signal transmitted in the horizontal polarization and the broadcast signal transmitted in the vertical polarization included in the signal is the same as the description of FIG. 7D, and thus the description will be omitted again.

[0246] FIG. 7G shows an example of a system configuration when the second method of the pass-through transmission method is applied to the digital terrestrial television broadcasting service of the dual-polarization transmission method. FIG. 7G shows the head-end facility 400C of the cable television station and the broadcast receiving apparatus 100. FIG. 7H shows an example of the frequency conversion processing at that time.

[0247] When applying the pass-through transmission of the second method to the high-definition terrestrial digital broadcast service of the polarization-duplex transmission method according to an embodiment of the present invention, for a broadcast signal transmitted in horizontal polarization, signal band extraction and level adjustment are performed in the head-end facility 400C of a cable television station, and after performing frequency conversion processing to a frequency set by a CATV facility administrator, the signal is sent out. On the other hand, for a broadcast signal transmitted in vertical polarization, signal band extraction and level adjustment are performed in the head-end facility 400C of a cable television station, and frequency conversion processing similar to the description of FIG. 7D (processing of converting a broadcast signal transmitted in vertical polarization to a frequency band higher than the frequency band of 470 to 770 MHz, which is the band of UHF channels 13 to 62) is performed, and then the signal is sent out. The frequency conversion processing shown in FIG. 7H is different from FIG. 7F in that a broadcast signal transmitted in horizontal polarization is not limited to the frequency band of 470 to 770 MHz, which is the band of UHF channels 13 to 62, but the frequency conversion is performed so that the range is expanded to a lower frequency band and rearranged in the range of 90 to 770 MHz. By this processing, the frequency bands of the broadcast signal transmitted in horizontal polarization and the broadcast signal transmitted in vertical polarization do not overlap, so that signal transmission with a single coaxial cable (or optical fiber cable) becomes possible. The transmitted signal can be received by the broadcast receiving apparatus 100 of the present embodiment. In the broadcast receiving apparatus 100 of the present embodiment, the process of receiving and demodulating the broadcast signal transmitted in horizontal polarization and the broadcast signal transmitted in vertical polarization included in the signal is the same as the description of FIG. 7D, and thus the description will be omitted again.

[0248] Also, as another modification example of the frequency conversion process of the head - end equipment 400C of the cable TV station in Fig. 7G, the broadcast signal at the time of pass - through output after frequency conversion may be changed to the state shown in Figs. 7H to 7I. In this case, for both the broadcast signal transmitted in horizontal polarization and the broadcast signal transmitted in vertical polarization, signal band extraction and level adjustment may be performed, and after performing the frequency conversion process to the frequency set by the CATV facility manager, transmission may be carried out. In the example of Fig. 7I, frequency conversion is performed so as to rearrange both the broadcast signal transmitted in horizontal polarization and the broadcast signal transmitted in vertical polarization within the range of 90 - 770 MHz (the range from VHF1ch to UHF62ch). Since the frequency band beyond UHF62ch is not used, the frequency band utilization efficiency of the broadcast signal becomes higher than that in Fig. 7H.

[0249] Also, since the band for rearranging the broadcast signal is wider than the frequency band of 470 - 710 MHz, which is the band of UHF channels 13 - 52 at the time of antenna reception, as shown in the example of Fig. 7I, it is also possible to alternately rearrange the broadcast signal transmitted in horizontal polarization and the broadcast signal transmitted in vertical polarization. At this time, as shown in the example of Fig. 7I, if the pairs of the broadcast signal transmitted in horizontal polarization and the broadcast signal transmitted in vertical polarization, which were the same physical channel at the time of antenna reception, are alternately rearranged in the order of the physical channels at the time of antenna reception, when the broadcast receiving apparatus 100 of this embodiment performs an initial scan from the low - frequency side, the pairs of the broadcast signal transmitted in horizontal polarization and the broadcast signal transmitted in vertical polarization, which were originally the same physical channel, can be initially set in order in the unit of the same physical channel, and the initial scan can be performed efficiently.

[0250] Note that the examples of Figs. 7E, 7F, 7G, 7H, and 7I all illustrate examples when the horizontal polarization is the main polarization. However, depending on the operation, the horizontal polarization and the vertical polarization may be reversed.

[0251] Regarding the broadcast wave of the polarization - multiplexed transmission system that has adopted the pass - through transmission method described above, as described above, it can be received and played back by the second tuner / demodulation unit 130T of the broadcast receiving device 100, but it can also be received by the first tuner / demodulation unit 130C of the broadcast receiving device 100. When the broadcast wave of the terrestrial digital broadcast is received by the first tuner / demodulation unit 130C, among the broadcast signals of the broadcast wave of the terrestrial digital broadcast, the broadcast signals transmitted in the layer of the advanced terrestrial digital broadcast service are ignored, but the broadcast signals transmitted in the layer of the current terrestrial digital broadcast service are played back.

[0252] [Transmission Method 2 of Advanced Terrestrial Digital Broadcast Service] In order to realize 4K broadcast while maintaining the viewing environment of the current terrestrial digital broadcast service, as an example different from the above - mentioned one of the transmission methods of the advanced terrestrial digital broadcast service according to the embodiments of the present invention, the single - polarization transmission method will be described. The single - polarization transmission method according to the embodiments of the present invention is a method that has some specifications in common with the current terrestrial digital broadcast method. It uses either a horizontal polarization signal or a vertical polarization signal to perform data transmission by SISO (Single - Input Single - Output) technology. For example, about 6 MHz bandwidth corresponding to one physical channel is divided into 13 segments. Among them, 8 segments are assigned for the transmission of 2K broadcast programs, 4 segments are assigned for the transmission of 4K broadcast programs, and 1 segment is assigned for mobile reception. Note that for 2K broadcast programs, the image quality is maintained by optimizing the latest MPEG - 2 Video compression technology, etc., and they can be received by current TV receivers. For 4K broadcast programs, more efficient HEVC compression technology, VVC compression technology, etc. than MPEG - 2 Video are adopted, and the image quality is ensured by adopting technologies such as modulation multivalueization and NUC. Note that the number of segments assigned for each broadcast may be different from the above.

[0253] Fig. 7J shows an example of a single-polarization transmission method in the advanced terrestrial digital broadcast service according to an embodiment of the present invention. A frequency band of 470 to 710 MHz is used for the transmission of broadcast waves of the terrestrial digital broadcast service. The number of physical channels in the frequency band is 40 channels from 13 to 52ch, and each physical channel has a bandwidth of 6 MHz. In the single-polarization transmission method according to an embodiment of the present invention, the transmission of a 2K broadcast service and the transmission of a 4K broadcast service are performed simultaneously within one physical channel.

[0254] Fig. 7J shows two examples, (1) and (2), of the allocation example of 13 segments. In the example of (1), the transmission of a 4K broadcast program is performed using segments 1 to 4 (B layer). The transmission of a 2K broadcast program is performed using segments 5 to 12 (C layer). The 4K broadcast program transmitted using the B layer and the 2K broadcast program transmitted using the C layer may be simulcast that transmits broadcast programs of the same content at different resolutions, or may transmit broadcast programs of different contents. The example of (2) is a modification different from (1). In the example of (2), the transmission of a 2K broadcast program is performed using segments 1 to 8 (B layer). The transmission of a 4K broadcast program is performed using segments 9 to 12 (C layer).

[0255] Fig. 7K shows an example of the configuration of a broadcast system of an advanced terrestrial digital broadcast service using the single-polarization transmission method according to an embodiment of the present invention. This shows both the transmission-side system and the reception-side system of the advanced terrestrial digital broadcast service using the single-polarization transmission method. The configuration of the broadcast system of the advanced terrestrial digital broadcast service using the single-polarization transmission method is basically the same as the configuration of the broadcast system shown in Fig. 1, but the radio tower 300S, which is equipment of the broadcast station, becomes a single-polarization transmission antenna capable of transmitting either a horizontally polarized signal or a vertically polarized signal. Also, in the example of Fig. 7K, the broadcast receiving apparatus 100 describes only the station selection / detection unit 131H of the second tuner / demodulation unit 130T, and the description of other operation units is omitted.

[0256] The single-polarization wave signal transmitted from the radio tower 300S is received by the antenna 200S, which is a single-polarization wave receiving antenna, and is input from the connector part 100F3 to the station selection / detection part 131H via the coaxial cable 202S. It is common to use an F-type connector for the connector part that connects the antenna (coaxial cable) and the television receiver. In the configuration of the broadcast system of the advanced terrestrial digital broadcast service using the single-polarization wave transmission method, it is possible to connect the antenna 200S and the broadcast receiving device 100 with a single coaxial cable 202S, and the frequency conversion process (conversion part) is also unnecessary, so it is suitable.

[0257] In addition, as described above, the broadcast wave of the terrestrial digital broadcast transmitted by the single-polarization wave transmission method can be received and played back by the second tuner / demodulation part 130T of the broadcast receiving device 100, but it can also be received by the first tuner / demodulation part 130C of the broadcast receiving device 100. When the broadcast wave of the terrestrial digital broadcast is received by the first tuner / demodulation part 130C, among the broadcast signals of the broadcast wave of the terrestrial digital broadcast, the broadcast signals transmitted in the layer of the advanced terrestrial digital broadcast service are ignored, but the broadcast signals transmitted in the layer of the current terrestrial digital broadcast service are played back. As described above, in the broadcast receiving device 100, among the broadcast waves of the terrestrial digital broadcast transmitted by the single-polarization wave transmission method, the broadcast signals transmitted in the layer of the current terrestrial digital broadcast service (the layer that transmits the 2K broadcast in FIG. 7J) can also be received by the first tuner / demodulation part 130C. Therefore, by adopting a double-tuner configuration that uses the second tuner / demodulation part 130T and the first tuner / demodulation part 130C simultaneously, it is possible to receive / play back the broadcast signals transmitted in the layer of the advanced terrestrial digital broadcast service and the broadcast signals transmitted in the layer of the current terrestrial digital broadcast service simultaneously. Fig. 7L shows an example of the configuration of a broadcast system for a high-definition terrestrial digital broadcast service using the single-polarization transmission method according to an embodiment of the present invention, which is a configuration of the so-called double tuner. This shows both the transmission-side system and the reception-side system of the high-definition terrestrial digital broadcast service using the single-polarization transmission method. The configuration of the broadcast system for the high-definition terrestrial digital broadcast service using the single-polarization transmission method is basically the same as the configuration of the broadcast system shown in Fig. 1, but the radio tower 300S, which is equipment of the broadcast station, becomes a single-polarization transmission antenna capable of transmitting either a horizontally polarized wave signal or a vertically polarized wave signal. Also, in the example of Fig. 7L, only the station selection / detection unit 131C of the first tuner / demodulation unit 130C and the station selection / detection unit 131H of the second tuner / demodulation unit 130T are extracted and described in the broadcast reception device 100, and the description of other operation units is omitted. The single-polarization signal transmitted from the radio tower 300S is received by the antenna 200S, which is a single-polarization reception antenna, and is input to the broadcast reception device 100 from the connector unit 100F3 via the coaxial cable 202S. The single-polarization signal input to the broadcast reception device 100 is split and input to the station selection / detection unit 131C and the station selection / detection unit 131H, respectively. In the station selection / detection unit 131C, station selection / detection processing for the broadcast wave of the current terrestrial digital broadcast service is performed, and in the station selection / detection unit 131H, station selection / detection processing for the broadcast wave of the high-definition terrestrial digital broadcast service is performed. With such a configuration, in a broadcast system that provides both the current terrestrial digital broadcast service and the high-definition terrestrial digital broadcast service, it becomes possible to receive the current terrestrial digital broadcast service and the high-definition terrestrial digital broadcast service simultaneously. In particular, efficient processing is possible at the channel setting process and the like. Note that the current terrestrial digital broadcast service and the high-definition terrestrial digital broadcast service may be transmitted using the same physical channel or different physical channels. Also, the current terrestrial digital broadcast service and the high-definition terrestrial digital broadcast service may or may not be a pair of simulcast services. Furthermore, the example in Fig. 7L is an example of receiving a broadcast service of an advanced terrestrial digital broadcast service using a single-polarization transmission system. However, the same configuration can also be applied to receiving a broadcast service of an advanced terrestrial digital broadcast service using a dual-polarization transmission system. In this case, the dual-polarization signal received by antenna 200T, which is an antenna for receiving both polarizations, and input from connector unit 100F3 to broadcast receiver 100 via conversion unit 201T may be split and input to tuning / detection unit 131C, tuning / detection unit 131H, and tuning / detection unit 131V, respectively. Tuning / detection unit 131C performs tuning / detection processing on the broadcast wave of the current terrestrial digital broadcast service transmitted by either the horizontal polarization signal or the vertical polarization signal, and tuning / detection unit 131H and tuning / detection unit 131V perform tuning / detection processing on the broadcast wave of the advanced terrestrial digital broadcast service transmitted by the horizontal polarization signal and the vertical polarization signal.

[0258] [Transmission System 3 of Advanced Terrestrial Digital Broadcast Service] In order to realize 4K broadcast while maintaining the viewing environment of the current terrestrial digital broadcast service, as an example different from the above of the transmission system of the advanced terrestrial digital broadcast service according to the embodiment of the present invention, a hierarchical division multiplexing transmission system will be described. The hierarchical division multiplexing transmission system according to the embodiment of the present invention is a system that shares some specifications with the current terrestrial digital broadcast system. For example, the broadcast wave of the 4K broadcast service with a low signal level is multiplexed and transmitted on the same channel as the broadcast wave of the current 2K broadcast service. Note that for 2K broadcast, the reception level of 4K broadcast is suppressed below the required C / N, and reception is performed as before. For 4K broadcast, while expanding the transmission capacity by modulation multileveling, etc., a reception technique corresponding to LDM (hierarchical division multiplexing) technology is used to cancel the 2K broadcast wave and perform reception with the remaining 4K broadcast wave.

[0259] Fig. 8A shows an example of a hierarchical division multiplex transmission method in an advanced terrestrial digital broadcast service according to an embodiment of the present invention. The upper layer is composed of modulated waves of current 2K broadcasts, the lower layer is composed of modulated waves of 4K broadcasts, the upper layer and the lower layer are multiplexed, and output as a composite wave in the same frequency band. For example, 64QAM or the like may be used as the modulation method in the upper layer, and 256QAM or the like may be used as the modulation method in the lower layer. Note that the 2K broadcast program transmitted using the upper layer and the 4K broadcast program transmitted using the lower layer may be simulcast that transmits broadcast programs of the same content at different resolutions, or may transmit broadcast programs of different content. Here, the upper layer is transmitted at high power, and the lower layer is transmitted at low power. Note that the difference (power difference) between the modulated wave levels of the upper layer and the lower layer is called the injection level (IL: Injection Level), and this is a value set on the broadcast station side. The injection level is generally expressed as a relative ratio (dB) in logarithmic representation of the difference (power difference) in modulated wave levels.

[0260] Fig. 8B shows an example of the configuration of a broadcast system for an advanced terrestrial digital broadcast service using the hierarchical division multiplex transmission method according to an embodiment of the present invention. The configuration of the broadcast system for the advanced terrestrial digital broadcast service using the hierarchical division multiplex transmission method is basically the same as the configuration of the broadcast system shown in Fig. 1, but the radio tower 300L, which is equipment of the broadcast station, is a transmission antenna that transmits a broadcast signal multiplexing the 2K broadcast of the upper layer and the 4K broadcast of the lower layer. Also, in the example of Fig. 8B, the broadcast receiving apparatus 100 describes only the channel selection / detection unit 131L of the third tuner / demodulation unit 130L, and omits the description of other operation units.

[0261] The broadcast signal received by the antenna 200L is input from the connector unit 100F4 to the channel selection / detection unit 131L via the conversion unit (converter) 201L and the coaxial cable 202L. Here, in the above configuration, when a broadcast signal is transmitted from the antenna 200L to the broadcast receiver 100, as shown in FIG. 8C, frequency conversion amplification processing may be performed on the broadcast signal in the conversion unit 201L. That is, when the antenna 200L is installed on the roof of an apartment building or the like and the broadcast signal is transmitted to the broadcast receiver 100 in each room by the coaxial cable 202L with a long cable length, the broadcast signal may be attenuated, and there is a possibility that the 4K broadcast wave in the lower floors cannot be correctly received particularly in the channel selection / detection unit 131L.

[0262] Therefore, in order to prevent the above problems, the conversion unit 201L performs frequency conversion amplification processing on the 4K broadcast signal in the lower floors. The frequency conversion amplification processing converts the frequency band of the 4K broadcast signal in the lower floors from the frequency band of 470 to 710 MHz (the band corresponding to channels 13 to 52 of UHF) to, for example, the frequency band of 770 to 1010 MHz that exceeds the band corresponding to channel 62 of UHF. Further, processing is performed to amplify the 4K broadcast signal in the lower floors to a signal level at which the influence of attenuation in the cable is not a problem. By performing such processing, it is possible to avoid interference between the 2K broadcast signal and the 4K broadcast signal and also avoid the influence of attenuation of the broadcast signal during coaxial cable transmission. When the cable length of the coaxial cable 202L is short or the like and the influence of attenuation is not a problem, the conversion unit 201L and the frequency conversion amplification processing may be unnecessary.

[0263] Also, as shown in FIG. 8D, the tuning / detection unit included in the third tuner / demodulation unit 130L of the broadcast receiving apparatus 100 may be configured by a tuning / detection unit 131L1 that performs tuning / detection and other processes on the modulated wave of the upper layer (2K broadcast) and a tuning / detection unit 131L2 that performs tuning / detection and other processes on the modulated wave of the lower layer (4K broadcast). With such a configuration, it becomes possible to perform tuning / detection and other processes simultaneously on the signals subjected to frequency conversion amplification processing in the conversion unit 201L using the same physical channel for both the 2K broadcast signal and the 4K broadcast signal transmitted from the broadcast station, and particularly suitable processing can be performed during simulcast and the like.

[0264] Also, it is preferable that the frequency band after conversion by the frequency conversion amplification process is between 710 and 1032 MHz, which exceeds the band corresponding to UHF channel 52, or between 770 and 1032 MHz, which exceeds the band corresponding to UHF channel 62 (in the case of retransmission by a cable TV station). It is preferable that the bandwidth of the region between the frequency band before conversion and the frequency band after conversion by the frequency conversion amplification process is set to be an integer multiple of the bandwidth of one physical channel (6 MHz). The frequency conversion amplification process may be performed only on the physical channels using signal transmission by the hierarchical division multiplex transmission method. Since all of these are the same as the description of the present embodiment related to frequency conversion already described, repeated description is omitted.

[0265] Note that the broadcast receiver 100 of this embodiment can identify whether the received broadcast signal is a broadcast signal transmitted in the lower layer or a broadcast signal transmitted in the upper layer by using the upper and lower layer identification bits of the TMCC information described in FIG. 5H. Further, the broadcast receiver 100 of this embodiment can identify whether the received broadcast signal is a broadcast signal that has been frequency-converted after antenna reception by using the frequency conversion processing identification bits of the TMCC information described in FIG. 5F. Further, the broadcast receiver 100 of this embodiment can identify whether the received broadcast signal is transmitting a 4K program in the lower layer by using the 4K signal transmission layer identification bits of the TMCC information described in FIG. 5I. Although these identification processes can also be performed by demodulating the data carrier and referring to the control information included in the stream, demodulation of the data carrier is necessary and the process becomes complicated. Since it is easier and faster to identify by referring to the parameters of the above-described TMCC information, for example, the initial scan of the broadcast receiver 100 can be made faster.

[0266] Note that the station selection / detection unit 131L of the third tuner / demodulation unit 130L of the broadcast receiver 100 according to the embodiment of the present invention already has a reception function corresponding to the LDM (layer division multiplexing) technology as described above, so the conversion unit 201L shown in FIG. 8B is not necessarily required between the antenna 200L and the broadcast receiver 100.

[0267] Note that the broadcast wave of the terrestrial digital broadcast transmitted by the layer division multiplexing transmission method described above can be received and played back by the third tuner / demodulation unit 130L of the broadcast receiver 100 as described above, but can also be received by the first tuner / demodulation unit 130C of the broadcast receiver 100. When the broadcast wave of the terrestrial digital broadcast is received by the first tuner / demodulation unit 130C, among the broadcast signals of the broadcast wave of the terrestrial digital broadcast, the broadcast signals transmitted in the layer of the advanced terrestrial digital broadcast service are ignored, but the broadcast signals transmitted in the layer of the current terrestrial digital broadcast service are played back.

[0268] [MPEG-2 TS format] The broadcast system of this embodiment is compatible with MPEG-2 TS, which is adopted in current terrestrial digital broadcast services and other media transport methods for transmitting data such as video and audio. Specifically, the format of the stream transmitted by the OFDM transmission wave in Fig. 4D(1) is MPEG-2 TS. Among the OFDM transmission waves in Fig. 4D(2) and Fig. 4D(3), the format of the stream transmitted in the layer where the current terrestrial digital broadcast service is transmitted is MPEG-2 TS. Also, the format of the stream obtained by demodulating the transmission wave by the first tuner / demodulator 130C of the broadcast receiver 100 in Fig. 2 is MPEG-2 TS. Among the streams obtained by demodulating the transmission wave by the second tuner / demodulator 130T, the format of the stream corresponding to the layer where the current terrestrial digital broadcast service is transmitted is MPEG-2 TS. Similarly, among the streams obtained by demodulating the transmission wave by the third tuner / demodulator 130L, the format of the stream corresponding to the layer where the current terrestrial digital broadcast service is transmitted is MPEG-2 TS.

[0269] MPEG-2 TS is characterized by multiplexing components such as video and audio that make up a program, together with control signals and clocks, into one packet stream. Since it is treated as one packet stream including clocks, it is suitable for transmitting one content over one transmission path with ensured transmission quality and is adopted in many current digital broadcast systems. Also, it is possible to realize two-way communication via a two-way network such as a fixed network / mobile network, and it can support a broadcast communication cooperation system that combines functions using a broadband network with digital broadcast services, such as acquiring additional content via the broadband network, performing arithmetic processing in a server device, and presenting processing in cooperation with a portable terminal device in combination with digital broadcast services.

[0270] Fig. 9A shows an example of the protocol stack of the transmission signal in a broadcast system using MPEG-2 TS. In MPEG-2 TS, PSI, SI, and other control signals are transmitted in section format.

[0271] [Control Signals for a Broadcasting System Using the MPEG-2 TS Format] As control information in the MPEG-2 TS format, there are tables mainly used for program arrangement information and tables used other than for program arrangement information. The tables are transmitted in section format, and descriptors are arranged within the tables.

[0272] [Tables Used for Program Arrangement Information] Figure 9B shows a list of tables used for program arrangement information in a broadcasting system using the MPEG-2 TS format. In this embodiment, the following tables are used as tables for program arrangement information.

[0273] (1) PAT (Program Association Table) (2) CAT (Conditional Access Table) (3) PMT (Program Map Table) (4) NIT (Network Information Table) (5) SDT (Service Description Table) (6) BAT (Bouquet Association Table) (7) EIT (Event Information Table) (8) RST (Running Status Table) (9) TDT (Time and Date Table) (10) TOT (Time Offset Table)

[0274] (11) LIT (Local Event Information Table) (12) ERT (Event Relation Table) (13) ITT (Index Transmission Table) (14) PCAT (Partial Content Announcement Table) (15) ST (Stuffing Table) (16) BIT (Broadcaster Information Table) (17) NBIT (Network Board Information Table) (18) LDT (Linked Description Table) (19) AMT (Address Map Table) (20) INT (IP / MAC Notification Table) (21) Tables set by the operator

[0275] <Tables used in digital broadcasting> Figure 9C shows a list of tables used other than the program arrangement information of the MPEG-2 TS system broadcast system. In this embodiment, the following tables are used as tables used other than the program arrangement information.

[0276] (1) ECM (Entitlement Control Message) (2) EMM (Entitlement Management Message) (3) DCT (Download Control Table) (4) DLT (DownLoad Table) (5) DIT (Discontinuity Information Table) (6) SIT (Selection Information Table) (7) SDTT (Software Download Trigger Table) (8) CDT (Common Data Table) (9) DSM-CC section (10) AIT (Application Information Table) (11) DCM (Download Control Message) (12) DMM (Download Management Message) (13) A table set by the operator

[0277] <Descriptor used in program arrangement information> Figures 9D, 9E, and 9F show a list of descriptors used in the program arrangement information of an MPEG-2 TS broadcast system. In this embodiment, the following descriptors are used as descriptors for program arrangement information.

[0278] (1) Conditional Access Descriptor (2) Copyright Descriptor (3) Network Name Descriptor (4) Service List Descriptor (5) Stuffing Descriptor (6) Satellite Delivery System Descriptor (7) Terrestrial Delivery System Descriptor (8) Bouquet Name Descriptor (9) Service Descriptor (10) Country Availability Descriptor

[0279] (11) Linkage Descriptor (12) NVOD Reference Descriptor (13) Time Shifted Service Descriptor (14) Short Event Descriptor (15) Extended Event Descriptor (16) Time Shifted Event Descriptor (17) Component Descriptor (18) Mosaic Descriptor (19) Stream Identifier Descriptor (20) CA Identifier Descriptor

[0280] (21) Content Descriptor (22) Parental Rating Descriptor (23) Hierarchical Transmission Descriptor (24) Digital Copy Control Descriptor (25) Emergency Information Descriptor (26) Data Component Descriptor (27) System Management Descriptor (28) Local Time Offset Descriptor (29) Audio Component Descriptor (30) Target Region Descriptor

[0281] (31) Hyperlink Descriptor (32) Data Content Descriptor (33) Video Decode Control Descriptor (34) Basic Local Event Descriptor (35) Reference Descriptor (36) Node Relation Descriptor (37) Short Node Information Descriptor (38) STC Reference Descriptor (39) Partial Reception Descriptor (40) Series Descriptor

[0282] (41) Event Group Descriptor (42) SI Parameter Descriptor (43) Broadcaster Name Descriptor (44) Component Group Descriptor (45) SI Prime TS Descriptor (46) Board Information Descriptor (47) LDT Linkage Descriptor (48) Connected Transmission Descriptor (49) TS Information Descriptor (50) Extended Broadcaster Descriptor

[0283] (51) Logo Transmission Descriptor (52) Content Availability Descriptor (53) Carousel Compatible Composite Descriptor (54) Conditional Playback Descriptor (55) AVC Video Descriptor (56) AVC Timing and HRD Descriptor (57) Service Group Descriptor (58) MPEG-4 Audio Descriptor (59) MPEG-4 Audio Extension Descriptor (60) Registration Descriptor

[0284] (61) Data Broadcast Id Descriptor (62) Access Control Descriptor (63) Area Broadcasting Information Descriptor (64) Material Information Descriptor (65)HEVC Video Descriptor (66)Hierarchy Descriptor (67)Hybrid Information Descriptor (68)Scrambler Descriptor (69)Descriptor Set by Operator

[0285] <Descriptor Used in Digital Broadcasting> Figure 9G shows a list of descriptors used other than the program arrangement information of the MPEG-2 TS system broadcast system. In this embodiment, the following are used as descriptors used other than the program arrangement information.

[0286] (1)Partial Transport Stream Descriptor (Partial Transport Stream Descriptor) (2)Network Identification Descriptor (3)Partial Transport Stream Time Descriptor (Partial Transport Stream Time Descriptor) (4)Download Content Descriptor (5)CA EMM TS Descriptor (6)CA Contract Information Descriptor (7)CA Service Descriptor (8)Carousel Identifier Descriptor (9)Association Tag Descriptor (10) Extended Association Tag Descriptor (Deferred Association tags Descriptor) (11) Network Download Content Descriptor (Network Download Content Descriptor) (12) Download Protection Descriptor (13) CA Startup Descriptor (14) Descriptor Set by the Operator

[0287] <Descriptor Used in INT Figure 9H shows a list of descriptors used in INT of the MPEG-2 TS broadcast system. In this embodiment, the following descriptors are used as descriptors used in INT. Note that the descriptors used in the above program arrangement information and the descriptors used other than the program arrangement information are not used in INT.

[0288] (1) Target Smartcard Descriptor (2) Target IP Address Descriptor (3) Target IPv6 Address Descriptor (4) IP / MAC Platform Name Descriptor (5) IP / MAC Platform Provider Name Descriptor (IP / MAC Platform Provider Name Descriptor) (6) IP / MAC Stream Location Descriptor (7) Descriptor Set by the Operator

[0289] <Descriptor used in AIT> Figure 9I shows a list of descriptors used in the AIT of an MPEG-2 TS-based broadcast system. In this embodiment, the following descriptors are used as descriptors for AIT. Note that the descriptors used in the above program arrangement information and the descriptors used other than the program arrangement information are not used in INT.

[0290] (1) Application Descriptor (2) Transport Protocol Descriptor (3) Simple Application Location Descriptor (Simple Application Location Descriptor) (4) Application Boundary and Permission Descriptor (Application Boundary and Permission Descriptor) (5) Autostart Priority Descriptor (6) Cache Control Info Descriptor (7) Randomized Latency Descriptor (8) External Application Control Descriptor (External Application Control Descriptor) (9) Playback Application Descriptor (10) Simple Playback Application Location Descriptor (Simple Playback Application Location Descriptor) (11) Application Expiration Descriptor (12) Descriptor set by the operator

[0291] [MMT method] The broadcast system of this embodiment can also support the MMT method as a media transport method for transmitting data such as video and audio. Specifically, among the OFDM transmission waves in FIGS. 4D(2) and 4D(3), the stream method transmitted in the layer where advanced terrestrial digital broadcast services are transmitted is basically the MMT method. Also, among the streams obtained by demodulating the transmission wave by the second tuner / demodulation unit 130T of the broadcast receiver 100 in FIG. 2, the stream method corresponding to the layer where advanced terrestrial digital broadcast services are transmitted is basically MMT. Similarly, among the streams obtained by demodulating the transmission wave by the third tuner / demodulation unit 130L, the stream method corresponding to the layer where advanced terrestrial digital broadcast services are transmitted is basically MMT. Note that as a modification, an MPEG-2 TS stream may be used for advanced terrestrial digital broadcast services. Also, the stream method obtained by demodulating the transmission wave by the fourth tuner / demodulation unit 130B is MMT.

[0292] The MMT method is a newly formulated media transport method because the functions of the MPEG-2 TS method have limitations in response to environmental changes related to content distribution in recent years, such as the diversification of content, the diversification of devices using content, the diversification of transmission paths for distributing content, and the diversification of content storage environments.

[0293] The codes of the video signal and audio signal of the broadcast program are MFU (Media Fragment Unit) / MPU (Media Processing Unit), which are placed on the MMTP (MMT Protocol) payload and packetized into MMTP packets for transmission via IP packets. Also, for data content and subtitle signals related to the broadcast program, they are in the form of MFU / MPU, placed on the MMTP payload and packetized into MMTP packets for transmission via IP packets.

[0294] For the transmission of MMTP packets, UDP / IP (User Datagram Protocol / Internet Protocol) is used in the broadcast transmission path, and UDP / IP or TCP / IP (Transmission Control Protocol / Internet Protocol) is used in the communication line. Also, in the broadcast transmission path, the TLV multiplexing method may be used for efficient transmission of IP packets.

[0295] Figure 10A shows the protocol stack of MMT in the broadcast transmission path. Also, Figure 10B shows the protocol stack of MMT in the communication line. In the MMT method, a mechanism for transmitting two types of control information, MMT-SI and TLV-SI, is prepared. MMT-SI is control information indicating the configuration of a broadcast program, etc. It is in the form of a control message of MMT, carried on the MMTP payload, packetized into an MMTP packet, and transmitted as an IP packet. TLV-SI is control information regarding the multiplexing of IP packets, and provides information for channel selection and the correspondence information between IP addresses and services.

[0296] [Control Signal of Broadcast System Using MMT Method] As described above, in the MMT method, TLV-SI and MMT-SI are prepared as control information. TLV-SI is composed of a table and descriptors. The table is transmitted in section format, and the descriptors are arranged within the table. MMT-SI is composed of three layers: a message storing tables and descriptors, a table having elements and attributes indicating specific information, and a descriptor indicating more detailed information.

[0297] [Table Used in TLV-SI] Figure 10C shows a list of tables used in TLV-SI of the broadcast system of the MMT method. In this embodiment, the following tables are used as the tables of TLV-SI. Also, tables synonymous with the tables shown in Figures 9B and 9C may be further used.

[0298] (1) Network Information Table for TLV (2) Address Map Table (3) Tables set by the operator

[0299] <Descriptors used in TLV-SI> Figure 10D shows a list of descriptors used in TLV-SI of the MMT-based broadcast system. In this embodiment, the following descriptors are used as TLV-SI descriptors. Also, descriptors synonymous with the descriptors shown in FIGS. 9D, 9E, 9F, 9G, 9H, and 9I may be further used.

[0300] (1) Service List Descriptor (2) Satellite Delivery System Descriptor (3) System Management Descriptor (4) Network Name Descriptor (5) Remote Control Key Descriptor (6) Descriptors set by the operator

[0301] (7) Messages used in MMT-SI Figure 10E shows a list of messages used in MMT-SI of the MMT-based broadcast system. In this embodiment, the following messages are used as MMT-SI messages.

[0302] (1) PA (Package Access) message (2) M2 section message (3) CA message (4) M2 short section message (5) Data transmission message (6) Messages set by the operator

[0303] <Tables used in MMT-SI> Figure 10F shows a list of tables used in MMT-SI of the MMT-based broadcast system. In this embodiment, the following tables are used as MMT-SI tables. Also, tables synonymous with the tables shown in FIGS. 9B and 9C may be further used.

[0304] (1) MPT (MMT Package Table) (2) PLT (Package List Table) (3) LCT (Layout Configuration Table) (4) ECM (Entitlement Control Message) (5) EMM (Entitlement Management Message) (6) CAT(MH) (Conditional Access Table (MH)) (7) DCM (Download Control Message) (8) DMM (Download Management Message) (9) MH-EIT (MH-Event Information Table) (10) MH-AIT (MH-Application Information Table)

[0305] (11) MH-BIT (MH-Broadcaster Information Table) (12) MH-SDTT (MH-Software Download Trigger Table) (13) MH-SDT (MH-Service Description Table) (14) MH-TOT (MH-Time Offset Table) (15) MH-CDT (MH-Common Data Table) (16) MH-DIT (MH-Discontinuity Information Table) (17) MH-SIT (MH-Selection Information Table) (18) DDM Table (Data Directory Management Table) (19) DAM Table (Data Asset Management Table) (20) DCC Table (Data Content Configuration Table) (21) EMT (Event Message Table) (22) Tables Set by the Operator

[0306] <Descriptors Used in MMT-SI> Figures 10G, 10H, and 10I show a list of descriptors used in MMT-SI of the MMT-based broadcast system. In this embodiment, the following descriptors are used as MMT-SI descriptors. Also, descriptors synonymous with each of the descriptors shown in Figures 9D, 9E, 9F, 9G, 9H, and 9I may be further used.

[0307] (1) Asset Group Descriptor (2) Event Package Descriptor (3) Background Color Descriptor (4) MPU Presentation Region Descriptor (5) MPU Timestamp Descriptor (6) Dependency Descriptor (7) Access Control Descriptor (8) Scrambler Descriptor (9) Message Authentication Method Descriptor (10) Emergency Information Descriptor

[0308] (11) MH-MPEG-4 Audio Descriptor (12) MH-MPEG-4 Audio Extension Descriptor (MH-MPEG-4 Audio Extension Descriptor) (13) MH-HEVC Descriptor (14) MH-Linkage Descriptor (15) MH-Event Group Descriptor (16) MH-Service List Descriptor (17) MH-Short Event Descriptor (18) MH-Extended Event Descriptor (19) Video Component Descriptor (20) MH-Stream Identifier Descriptor

[0309] (21) MH-Content Descriptor (22) MH-Parental Rating Descriptor (23) MH-Audio Component Descriptor (24) MH-Target Region Descriptor (25) MH-Series Descriptor (26) MH-SI Parameter Descriptor (27) MH-Broadcaster Name Descriptor (28) MH-Service Descriptor (29) IP Data Flow Descriptor (30) MH-CA Startup Descriptor

[0310] (31) MH-Type Descriptor (32) MH-Info Descriptor (33) MH-Expire Descriptor (34) MH-CompressionType Descriptor (MH-Compression Type Descriptor) (35) MH-Data Component Descriptor (36) UTC-NPT Reference Descriptor (37) Event Message Descriptor (38) MH-Local Time Offset Descriptor (39) MH-Component Group Descriptor (40) MH-Logo Transmission Descriptor

[0311] (41) MPU Extended Timestamp Descriptor (42) MPU Download Content Descriptor (43) MH-Network Download Content Descriptor (MH-Network Download Content Descriptor) (44) MH-Application Descriptor (45) MH-Transport Protocol Descriptor (46) MH-Simple Application Location Descriptor (MH-Simple Application Location Descriptor) (47) MH-Application Boundary and Permission Descriptor (MH-Application Boundary and Permission Descriptor) (48) MH-Autostart Priority Descriptor (49) MH-Cache Control Info Descriptor (50) MH-Randomized Latency Descriptor

[0312] (51) Linked PU Descriptor (52) Locked Cache Descriptor (53) Unlocked Cache Descriptor (54) MH-Download Protection Descriptor (55) Application Service Descriptor (56) MPU Node Descriptor (57) PU Structure Descriptor (58) MH-Hierarchy Descriptor (59) Content Copy Control Descriptor (60) Content Usage Control Descriptor

[0313] (61) Emergency News Descriptor (62) MH-CA Contract Info Descriptor (63) MH-CA Service Descriptor (64) MH-External Application Control Descriptor (MH-External Application Control Descriptor) (65) MH-Playback Application Descriptor (MH-Playback Application Descriptor) (66) MH-Simple Playback Application Location Descriptor (MH-Simple Playback Application Location Descriptor) (67) MH-Application Expiration Descriptor (MH-Application Expiration Descriptor) (68) Related Broadcaster Descriptor (69) Multimedia Service Descriptor (70) MH-Stuffing Descriptor (71) MH-Broadcast ID Descriptor (72) MH-Network Identification Descriptor (73) Descriptor Set by the Operator

[0314] <Relationship between Data Transmission and Each Control Information in the MMT System> Figure 10J shows the relationship between data transmission and representative tables in the broadcast system of the MMT system.

[0315] In the broadcast system of the MMT system, data transmission can be performed through multiple paths, such as a TLV stream via a broadcast transmission path or an IP data flow via a communication line. The TLV stream includes TLV-SIs such as TLV-NIT and AMT, and an IP data flow that is a data flow of IP packets. The IP data flow includes a video asset including a series of video MPUs and an audio asset including a series of audio MPUs. Further, a subtitle asset including a series of subtitle MPUs, a character super asset including a series of character super MPUs, a data asset including a series of data MPUs, etc. may also be included. These various assets are associated in package units by an MPT (MMT Package Table) stored in a PA message and transmitted. Specifically, the package ID and the asset ID of each asset included in the package may be associated and described in the MPT.

[0316] The assets that make up the package can be only the assets in the TLV stream, but as shown in FIG. 10J, it is also possible to include the assets transmitted in the IP data flow of the communication line. This can be realized by including the location information of each asset included in the package in the MPT so that the broadcast receiving apparatus 100 can grasp the reference destination of each asset. As the location information of each asset, (1) Data multiplexed in the same IP data flow as the MPT (2) Data multiplexed in the IPv4 data flow (3) Data multiplexed in the IPv6 data flow (4) Data multiplexed in the broadcast MPEG2-TS (5) Data multiplexed in the MPEG2-TS format in the IP data flow (6) Data at the specified URL etc., it is possible to specify various data transmitted through various transmission paths.

[0317] In the MMT-based broadcast system, there is further a concept of an event. An event is a so-called program concept handled by the MH-EIT included and sent in the M2 section message. Specifically, in the package indicated by the event package descriptor stored in the MH-EIT, a series of data included in the period of the duration from the disclosure time stored in the MH-EIT is the data included in the concept of the event. The MH-EIT can be used in the broadcast receiving apparatus 100 for various processes in units of the event (for example, program guide generation process, recording reservation and viewing reservation control, copyright management processes such as temporary storage, etc.).

[0318] [Channel setting process of broadcast receiving apparatus] <Initial scan> In current terrestrial digital broadcasting, the network ID differs for each transmission master, and it is common for information about other stations not to be described in the NIT. Therefore, the broadcast receiving apparatus 100 according to an embodiment of the present invention, which has compatibility with current terrestrial digital broadcasting, for the terrestrial digital broadcasting according to an embodiment of the present invention (advanced terrestrial digital broadcasting, or terrestrial digital broadcasting in which advanced terrestrial digital broadcasting and current terrestrial digital broadcasting are simultaneously transmitted in separate layers), needs to have a function of searching (scanning) all receivable channels at the reception point and creating a service list (receivable frequency table) based on the service ID. Note that in an area where the same network ID can be received on different physical channels by an MFN (Multi Frequency Network), it suffices to operate so as to select a channel with good reception C / N or BER (Bit Error Rate) and store it in the service list.

[0319] Note that for the advanced BS digital broadcasting or advanced CS digital broadcasting received by the fourth tuner / demodulation unit 130B of the broadcast receiving apparatus 100 according to an embodiment of the present invention, the broadcast receiving apparatus 100 may simply acquire and store the service list stored in the TLV-NIT, and there is no need to create a service list. Therefore, for the advanced BS digital broadcasting or advanced CS digital broadcasting received by the fourth tuner / demodulation unit 130B, an initial scan and a rescan described later are unnecessary.

[0320] <Rescan> The broadcast receiving apparatus 100 according to an embodiment of the present invention has a rescan function for cases such as a new station opening, installation of a new relay station, or change of the reception point of a television receiver. When changing the preset information, the broadcast receiving apparatus 100 can notify the user to that effect.

[0321] <Operation example during initial scan / rescan> FIG. 11A shows an example of an operation sequence of channel setting processing (initial scan / re-scan) of the broadcast receiving apparatus 100 according to an embodiment of the present invention. In the figure, an example in the case of adopting MPEG-2 TS as a media transport method is shown, but basically the same processing is performed in the case of adopting the MMT method.

[0322] In the channel setting process, first, the receiver function control unit 1102 sets the residence area (selection of the area where the broadcast receiving apparatus 100 is installed) based on a user instruction (S101). At this time, instead of the user instruction, the residence area may be automatically set based on the installation position information of the broadcast receiving apparatus 100 obtained by a predetermined process. As an example of the acquisition process of the installation position information, the LAN communication unit 121 may acquire information from the network to which it is connected, or the digital interface unit 125 may acquire information regarding the installation position from an external device to which it is connected. Next, an initial value of the frequency range to be scanned is set, and the tuner / demodulation unit (when not distinguishing the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, and the third tuner / demodulation unit 130L, it is described like this. The same applies hereinafter.) is instructed to perform tuning to the set frequency (S102).

[0323] The tuner / demodulation unit executes tuning based on the instruction (S103), and if it succeeds in locking to the set frequency (S103: Yes), the process proceeds to the process of S104. If the locking is not successful (S103: No), the process proceeds to the process of S111. In the process of S104, C / N is confirmed (S104), and if a C / N equal to or higher than a predetermined value is obtained (S104: Yes), the process proceeds to the process of S105 and reception confirmation processing is performed. If a C / N equal to or higher than a predetermined value is not obtained (S104: No), the process proceeds to the process of S111.

[0324] In the reception confirmation process, the reception function control unit 1102 first acquires the BER of the received broadcast wave (S105). Next, by acquiring and collating the NIT, it is confirmed whether the NIT is valid data (S106). If the NIT acquired in the process of S106 is valid data, the reception function control unit 1102 acquires information such as the transport stream ID and the original network ID from the NIT. Also, distribution system information regarding the physical conditions of the broadcast transmission path corresponding to each transport stream ID / original network ID is acquired from the terrestrial distribution system descriptor. Also, a list of service IDs is acquired from the service list descriptor.

[0325] Next, the reception function control unit 1102 checks the service list stored in the receiving apparatus to confirm whether the transport stream ID acquired in the process of S106 has already been acquired (S107). If the transport stream ID acquired in the process of S106 has not already been acquired (S107: No), the various types of information acquired in the process of S106 are associated with the transport stream ID and added to the service list (S108). If the transport stream ID acquired in the process of S106 has already been acquired (S107: Yes), the BER acquired in the process of S105 is compared with the BER at the time when the transport stream ID already described in the service list was acquired (S109). As a result, if the BER acquired in the process of S105 is better (S109: Yes), the service list is updated with the various types of information acquired in the process of S106 (S110). If the BER acquired in the process of S105 is not better (S109: No), the various types of information acquired in the process of S106 are discarded.

[0326] Also, in the above-described service list creation (addition / update) process, the remote control key ID may be acquired from the TS information descriptor, and the association between the representative service for each transport stream and the remote control key may be performed. By this process, one-touch channel selection described later becomes possible.

[0327] After completing the reception confirmation process, the receiver function control unit 1102 checks whether the current frequency setting is the final value of the frequency range to be scanned (S111). If the current frequency setting is not the final value of the frequency range to be scanned (S111: No), the frequency value set in the tuner / demodulator unit is incremented (S112), and the processes of S103 to S110 are repeated. If the current frequency setting is the final value of the frequency range to be scanned (S111: Yes), the process proceeds to S113.

[0328] In the process of S113, the service list created (added / updated) in the above process is presented to the user as a result of the channel setting process (S113). Also, if there are duplicates in the remote control keys or the like, the user may be notified of that fact, and the user may be prompted to change the remote control key settings or the like (S114). The service list created / updated in the above process is stored in a non-volatile memory such as the ROM 103 or the storage (accumulation) unit 110 of the broadcast receiving apparatus 100.

[0329] FIG. 11B shows an example of the data structure of the NIT. In the figure, 'transpotrt_stream_id' corresponds to the above-mentioned transport stream ID, and 'original_network_id' corresponds to the original network ID. Also, FIG. 11C shows an example of the data structure of the terrestrial distribution system descriptor. In the figure, 'guard_interval', 'transmission_mode', 'frequency', etc. correspond to the above-mentioned distribution system information. FIG. 11D shows an example of the data structure of the service list descriptor. In the figure,'service_id' corresponds to the above-mentioned service ID. FIG. 11E shows an example of the data structure of the TS information descriptor. In the figure,'remote_control_key_id' corresponds to the above-mentioned remote control key ID.

[0330] Note that in the broadcast receiving apparatus 100, the above-described frequency range to be scanned may be appropriately changed according to the broadcast service to be received. For example, when the broadcast receiving apparatus 100 is receiving a broadcast wave of the current terrestrial digital broadcast service, it is controlled to scan a frequency range of 470 to 770 MHz (corresponding to physical channels 13ch to 62ch). That is, the initial value of the frequency range is set to 470 to 476 MHz (center frequency 473 MHz), the final value of the frequency range is set to 764 to 770 MHz (center frequency 767 MHz), and in the process of S112, control is performed to implement a frequency value up of +6 MHz.

[0331] Also, when the broadcast receiving apparatus 100 is receiving a broadcast wave including an advanced terrestrial digital broadcast service, it is controlled to scan a frequency range of 470 to 1010 MHz (because there is a possibility that the frequency conversion process shown in FIG. 7D and the frequency conversion amplification process shown in FIG. 8C are performed). That is, the initial value of the frequency range is set to 470 to 476 MHz (center frequency 473 MHz), the final value of the frequency range is set to 1004 to 1010 MHz (center frequency 1007 MHz), and in the process of S112, control is performed to implement a frequency value up of +6 MHz. Note that even when the broadcast receiving apparatus 100 is receiving an advanced terrestrial digital broadcast service, if it is determined that the above-described frequency conversion process and frequency conversion amplification process are not performed, it may be controlled to scan only the frequency range of 470 to 770 MHz. The selection control of the frequency range to be scanned can be performed by the broadcast receiving apparatus 100 based on system identification and frequency conversion process identification of TMCC information and the like.

[0332] Also, when the broadcast system of the embodiment of the present invention has a configuration shown in, for example, FIG. 7C and the broadcast receiving apparatus 100 is receiving an advanced terrestrial digital broadcast service of a polarization multiplex transmission system, one of the channel selection / detection unit 131H and the channel selection / detection unit 131V may scan a frequency range of 470 to 770 MHz, and the other may scan a frequency range of 770 to 1010 MHz (when frequency conversion processing is performed on the transmission wave with the polarization detected by the other channel selection / detection unit). By controlling in this way based on the system identification and frequency conversion processing identification of the TMCC information, it becomes possible to omit scanning in an unnecessary frequency range, and it becomes possible to reduce the time required for channel setting. Further, in this case, the operation sequences of FIG. 11A may be advanced in parallel by both the channel selection / detection unit 131H and the channel selection / detection unit 131V, and the loops of the frequency up S112 in the operation sequence of FIG. 11A may be synchronized. At this time, for a pair of a horizontal polarization signal and a vertical polarization signal transmitted on the same physical channel in the loop of the frequency up in the operation sequence of FIG. 11A, if they are configured to be received in parallel respectively, control information and the like inside the packet stream of the advanced terrestrial digital service transmitted by the pair of the horizontal polarization signal and the vertical polarization signal can be decoded and acquired during the loop process. Thereby, since scanning and service list creation proceed efficiently, it is suitable.

[0333] Similarly, when the broadcast receiving apparatus 100 has a configuration shown in FIG. 8B and further has a so-called double tuner configuration in which a plurality of tuner / demodulation units (channel selection / detection units) are provided (for example, a configuration in which a plurality of third tuner / demodulation units 130L are provided, or a configuration shown in FIG. 8D), and is receiving an advanced terrestrial digital broadcast service of a hierarchical division multiplex transmission system, one of the double tuners may scan a frequency range of 470 to 770 MHz, and the other may scan a frequency range of 770 to 1010 MHz (when frequency conversion amplification processing is performed). By controlling in this way, it becomes possible to reduce the time required for channel setting as described above.

[0334] As described with reference to FIGS. 8A, 8B, and 8C, in the configuration shown in FIG. 8B, the terrestrial digital broadcast service transmitted on either the upper layer or the lower layer is the current terrestrial digital broadcast service. Therefore, for example, among the frequency ranges of 470 to 770 MHz and 770 to 1010 MHz, the first tuner / demodulator 130C may perform a scan on the frequency range in which the current terrestrial digital broadcast service is transmitted, and the third tuner / demodulator 130L may perform a scan in parallel on the other frequency range. Also in this case, similar to the parallel scan by the double tuner of the third tuner / demodulator 130L described above, it is possible to reduce the time required for channel setting. Whether the current terrestrial digital broadcast service or the advanced terrestrial digital broadcast service is being transmitted in either the frequency range of 470 to 770 MHz or the frequency range of 770 to 1010 MHz can be identified by receiving, at two points, one point at a time for each frequency range, for example, at two points of 470 to 476 MHz (center frequency 473 MHz) and 770 to 776 MHz (center frequency 773 MHz), by the third tuner / demodulator 130L before starting the operation sequence of the initial scan / rescan, obtaining the TMCC information transmitted at each frequency, and referring to the parameters (for example, system identification parameters) stored in the TMCC information.

[0335] In the case of a channel having a broadcast program that uses both horizontal and vertical polarization signals for transmission in the advanced terrestrial digital broadcast service using the polarization-duplex transmission method, such as the 4K broadcast program of the C layer shown in the hierarchical division example (1) of FIG. 7A, the same transport ID is detected in scans of both the frequency range of 470 to 770 MHz and the frequency range of 770 to 1010 MHz, and this is described in the service list as one channel. Also, in the case of the 2K broadcast program of the B layer shown in the figure, when the same broadcast program is transmitted in the B layer of the horizontal polarization signal and the B layer of the vertical polarization signal, the same transport ID may be detected and stored in the service list as one channel. That is, when the same broadcast program is transmitted in the same layer transmitted with different polarizations, it is recognized as merged into one channel and not recognized as separate channels. By doing so, in the channel selection process using the service list, it is possible to avoid confusion of the user due to the existence of exactly the same broadcast program on different channels.

[0336] On the other hand, in the advanced terrestrial digital broadcast service using the polarization-duplex transmission method, when different broadcast programs are transmitted in the B layer of the horizontal polarization signal and the B layer of the vertical polarization signal (when the B layer of the vertical polarization signal is treated as a virtual D layer), they are stored in the service list as different channels. Whether the same broadcast program is transmitted in the B layer of the horizontal polarization signal and the B layer of the vertical polarization signal can be determined by referring to the additional layer transmission identification parameter of the TMCC information or the like in the broadcast receiving apparatus 100.

[0337] [Channel Selection Process of Broadcast Receiver] The broadcast receiving apparatus 100 according to an embodiment of the present invention has functions as a program channel selection, such as one-touch channel selection using a one-touch key on a remote control, channel up / down selection using channel up / down keys on the remote control, and direct selection by directly inputting a three-digit number using the numeric keypad on the remote control. Any of these channel selection functions may be performed using the information stored in the service list generated by the above-described initial scan / re-scan. Also, after channel selection, information on the selected channel (the three-digit number used for direct selection, branch number, TS name, service name, logo, video resolution information (such as the distinction between UHD, HD, and SD), presence or absence of video resolution up / down conversion, number of audio channels, presence or absence of audio downmix, etc.) is displayed by means of banner display or the like. In this way, the user can visually obtain information on the channel after channel selection and confirm whether or not the desired channel has been selected. An example of the processing in each channel selection method will be described below.

[0338] <Example of processing for one-touch channel selection> (1) When a one-touch key on the remote control is pressed, select the service with the'service_id' specified by'remote_control_key_id'. (2) Set the last mode and perform display of channel information after channel selection.

[0339] <Example of processing for up / down channel selection using channel up / down buttons> (1) When the channel up / down keys on the remote control are pressed, perform channel selection in ascending order of the three-digit number used for direct selection. (1-1) When the up key is pressed, select the service adjacent to the upper side of the three-digit number. However, when the value of the current three-digit number is the maximum value in the service list, select the service with the minimum number. (1-2) When the down key is pressed, select the service adjacent to the lower side of the three-digit number. However, when the value of the current three-digit number is the minimum value in the service list, select the service with the maximum number. (2) Set the last mode and perform display of channel information after channel selection.

[0340] <Example of Direct Channel Selection Processing> (1) When direct channel selection is selected, the device waits for the input of a three - digit number. (2 - 1) If the input of the three - digit number is not completed within a predetermined time (about 5 seconds), it returns to the normal mode and displays the channel information of the currently selected service. (2 - 2) When the input of the three - digit number is completed, it determines whether the channel exists in the service list of the receivable frequency table. If not, it displays a message such as "This channel does not exist". (3) If the channel exists, it performs the channel selection process, sets the last mode, and displays the channel information after channel selection.

[0341] Note that the channel selection operation is based on SI. When it is determined that the broadcast is suspended, it may also have a function to display that fact and notify the user.

[0342] <Remote Controller of Broadcast Receiver> FIG. 12A shows an example of the external view of a remote controller used for inputting operation instructions for the broadcast receiver 100 according to an embodiment of the present invention.

[0343] The remote controller 180R includes a power key 180R1 for turning on / off the power (standby on / off) of the broadcast receiver 100, cursor keys (up, down, left, right) 180R2 for moving the cursor up, down, left, and right, a decision key 180R3 for determining the item at the cursor position as a selection item, and a return key 180R4.

[0344] In addition, the remote controller 180R is provided with a network switching key (high altitude digital, digital terrestrial, high altitude BS, BS, CS) 180R5 for switching the broadcast network received by the broadcast receiving apparatus 100. The remote controller 180R is also provided with one-touch keys (1 to 12) 180R6 for one-touch channel selection, a channel up / down key 180R7 for channel up / down selection, and a numeric keypad used for inputting a three-digit number during direct channel selection. In the example shown in the figure, the numeric keypad is shared with the one-touch keys 180R6, and during direct channel selection, a three-digit number can be input by operating the one-touch keys 180R6 after pressing the direct key 180R8.

[0345] In addition, the remote controller 180R is provided with an EPG key 180R9 for displaying a program guide and a menu key 180RA for displaying a system menu. The program guide and the system menu can be operated in detail using the cursor key 180R2, the enter key 180R3, and the back key 180R4.

[0346] In addition, the remote controller 180R is provided with a d key 180RB used for data broadcast services, multimedia services, etc., a cooperation key 180RC for displaying a list of broadcast communication cooperation services and their corresponding applications, etc., and color keys (blue, red, green, yellow) 180RD. In data broadcast services, multimedia services, broadcast communication cooperation services, etc., detailed operations can be performed using the cursor key 180R2, the enter key 180R3, the back key 180R4, and the color keys 180RD.

[0347] In addition, the remote controller 180R is provided with a video key 180RE for selecting related videos, an audio key 180RF for switching audio ES or switching between two languages, and a subtitle key 180RG for switching the on / off of subtitles or switching subtitle languages. The remote controller 180R is also provided with a volume key 180RH for increasing / decreasing the volume of audio output and a mute key 180RI for switching the on / off of audio output.

[0348] <Example of Network Switching Process Using High-Definition Digital Keys> The remote controller 180R of the broadcast receiving apparatus 100 according to an embodiment of the present invention includes, as network switching keys 180R5, a "High-Definition Digital Key", a "Digital Key", a "High-Definition BS Key", a "BS Key", and a "CS Key". Here, in the high-definition terrestrial digital broadcast service, for example, when simulcast of 4K broadcast programs and 2K broadcast programs is performed in different layers, when the "High-Definition Digital Key" is pressed, the selection of 4K broadcast programs is prioritized when selecting a channel, and when the "Digital Key" is pressed, the selection of 2K broadcast programs is prioritized when selecting a channel. By controlling in this way, for example, when there are many errors in the transmission wave of a 4K broadcast program in a situation where reception of a 4K broadcast program is possible, by pressing the "Digital Key", control such as forcibly selecting a 2K broadcast program becomes possible. Also, when simulcast of 4K broadcast programs and 2K broadcast programs is performed in different layers and there are many errors in the transmission wave of a 4K broadcast program in a situation where reception of a 4K broadcast program is possible, even when the "High-Definition Digital Key" is pressed, it may be configured to select a 2K broadcast program (simulcast of the currently selected 4K broadcast program).

[0349] <Example of Screen Display at Channel Selection> As described above, when the broadcast receiving apparatus 100 according to an embodiment of the present invention executes channel selection by one-touch channel selection, channel up / down selection, direct selection, etc., it has a function of displaying information on the selected channel by means of a banner display or the like.

[0350] Fig. 12B shows an example of the banner display during channel selection. The banner display 192A1 is an example of the banner display shown when selecting a 2K broadcast program. For example, it may display the program name, the start time / end time of the program, the network type, the number of the direct channel selection key of the remote control, the service logo, and a three-digit number. Also, the banner display 192A2 is an example of the banner display shown when selecting a 4K broadcast program. For example, in addition to each piece of information similar to the aforementioned banner display 192A1, a symbolized mark of "High Definition" indicating that the currently received program is a 4K broadcast program is further displayed. Also, when resolution conversion processing, downmixing processing, etc. are performed, a display indicating that fact may be made. In the example of the banner display 192A2, as an example, it shows that down-conversion processing from UHD resolution to HD resolution and downmixing processing from 22.2ch to 5.1ch have been performed.

[0351] In the broadcast receiving apparatus 100, by performing these displays, when the same content is being broadcast simultaneously as broadcast programs of different qualities such as a 2K broadcast program and a 4K broadcast program by simulcast or the like, the user can suitably grasp which broadcast program is being displayed.

[0352] According to the system of the advanced digital broadcast service having some or all of the functions of each function according to the embodiment of the present invention described above, it is possible to provide a transmission technology and a reception technology for a more highly functional advanced digital broadcast service in consideration of compatibility with the current digital broadcast service. That is, it is possible to provide a technology for more suitably transmitting or receiving the advanced digital broadcast service.

[0353] (Embodiment 2) [Advanced audio signal] This embodiment relates to the handling of high - level audio signals. The audio signals of the current system are channel - based signals corresponding to speakers. There are 5.1ch and 22.2ch ones (where "ch" is an abbreviation for "channel"). In contrast, in this embodiment, in addition to channel - based signals, audio signals including object - based signals and signals in the HOA (Higher Order Ambisonics) format are handled.

[0354] An object - based signal is an audio signal such as a narrator's voice that can have its playback position changed on the receiver side, such as being placed on the right side or the left side. The playback position does not need to be fixed and can be changed dynamically.

[0355] An HOA - format signal is a signal obtained by expanding the sound field as a sum of spherical harmonic functions. Since there is an upper limit to the transmission capacity, expansion up to a finite order is used. Since the channel - based signal is basically recorded at microphone positions corresponding to standard speaker arrangements, it is suitable for audio playback with a speaker group in a standard or near - standard arrangement. In contrast, in the HOA format, since it is a method of recording spatial sound field information independently of a specific speaker arrangement, it is suitable for corresponding to any speaker arrangement.

[0356] Examples of standard speaker arrangements are shown in FIGS. 13A, 13B, and 13C. The speaker group can be divided into three groups: upper layer, middle layer, and lower layer, according to the height of the installation position, as shown in FIG. 13A. And the arrangement for each group is as shown in FIGS. 13B and 13C. FIG. 13B shows the arrangement of a 22.2ch speaker system, and FIG. 13C shows the arrangement of a 7.1ch speaker system. The numbers after the decimal point in the ch - number di...

Claims

1. A method for playing an audio signal in a receiving device that receives a broadcast wave including an audio signal in which the position information of a sound source is indicated in polar coordinates, a receiving step of receiving the broadcast wave; an audio output step of outputting an audio signal to a plurality of speakers arranged so as to form a plurality of layers in a cylindrical shape outside the receiving device; comprising: the output of the audio signal in the audio output step is performed by setting a triangular mesh having the plurality of speakers as vertices, calculating a signal distribution coefficient for distributing the audio signal included in the broadcast wave received in the receiving step to the plurality of speakers based on the triangular mesh, and outputting the audio signal generated based on the signal distribution coefficient to the plurality of speakers; A method for playing an audio signal.

2. In the method for playing an audio signal according to Claim 1, the calculation of the signal distribution coefficient is performed by arranging a virtual speaker in a direction from the viewing position into the square for a speaker that forms a left-right symmetric square having a symmetry plane including the viewing position among the plurality of speakers arranged so as to form a plurality of layers in a cylindrical shape, setting a triangular mesh having the plurality of speakers and the virtual speaker as vertices, and performing multi-stage vector decomposition of the audio signal of the sound source based on the triangular mesh. A method for playing an audio signal.

3. In the method for playing an audio signal according to Claim 1, the calculation of the signal distribution coefficient is performed by orthogonally projecting the position of the sound source onto the speaker arrangement plane of the layer where the viewing position is located for the sound source in a direction where there is no speaker arrangement as viewed from the speaker arrangement plane of the layer where the viewing position is located among the plurality of layers, and assuming that there is a sound source at the orthogonally projected position. A method for playing an audio signal.

4. In the method for playing an audio signal according to Claim 1, the calculation of the signal distribution coefficient is performed by arranging a virtual speaker in the direction where there is no speaker arrangement for the sound source in a direction where there is no speaker arrangement as viewed from the speaker arrangement plane of the layer where the viewing position is located among the plurality of layers, setting a triangular mesh having the plurality of speakers and the virtual speaker as vertices, distributing the audio signal of the sound source based on the triangular mesh, and then re-distributing the audio signal distributed to the virtual speaker to the plurality of speakers. A method for playing an audio signal.

5. In the method for playing an audio signal according to Claim 1, When calculating the signal distribution coefficient, if there is a layer in which speakers are arranged biased forward among the plurality of layers, a virtual speaker is arranged at the center or behind the center of the layer in which the speakers are arranged biased forward, and a triangular mesh including the virtual speaker is set to perform the calculation. Method for playing an audio signal. Claim 6 A method for playing an audio signal in a receiving device that receives a broadcast wave including an audio signal in which the position information of a sound source is indicated in rectangular coordinates, A receiving step of receiving the broadcast wave, An audio output step of forming a plurality of layers in a rectangular parallelepiped shape outside the receiving device and outputting an audio signal to a plurality of speakers arranged so as to form a plurality of columns in the plurality of layers, Comprising: The output of the audio signal in the audio output step distributes the audio signal of the sound source to the plurality of layers, distributes the audio signal distributed to each of the plurality of layers to the plurality of columns of each of the plurality of layers, and calculates a signal distribution coefficient for distributing the audio signal distributed to each of the plurality of columns to the speakers, and outputs the audio signal generated based on the signal distribution coefficient to the plurality of speakers. Method for playing an audio signal. Claim 7 In the method for playing an audio signal according to claim 6, When calculating the signal distribution coefficient, for the sound source when the sound source is outside the rectangular parallelepiped space in which the plurality of speakers are arranged and the position of the intersection of the straight line connecting the position of the sound source and the viewing position and the boundary surface of the rectangular parallelepiped space is different from the viewing position, it is performed assuming that there is a sound source at the position of the intersection. Method for playing an audio signal. Claim 8 In the method for playing an audio signal according to claim 6, When calculating the signal distribution coefficient, for the sound source when the sound source is outside the rectangular parallelepiped space in which the plurality of speakers are arranged and the position of the intersection of the straight line connecting the position of the sound source and the viewing position and the boundary surface of the rectangular parallelepiped space is the same as the viewing position, the position of the sound source is orthogonally projected onto the plane obtained by extending the boundary surface of the space including the viewing position, and it is performed assuming that there is a sound source at the orthogonally projected position. Method for playing an audio signal. Claim 9 In the method for playing an audio signal according to claim 6, The calculation of the signal distribution coefficient is performed by replacing the value of the position coordinates of the sound source outside the rectangular parallelepiped space where the plurality of speakers are arranged so that the value falls within the range of the maximum value and the minimum value in the three-dimensional directions of the space, assuming that there is a sound source at the position of the replaced value of the position coordinates. Method for reproducing an audio signal.

10. In the method for reproducing an audio signal according to claim 6, When there is a layer in which speakers are arranged biased forward among the plurality of layers, the calculation of the signal distribution coefficient is performed by setting a layer composed of the speakers in the layer in which the speakers are arranged biased forward and some speakers in other layers. Method for reproducing an audio signal.

11. A method for reproducing an audio signal in a receiving device that receives a broadcast wave including an audio signal capable of having position information of a sound source, a receiving step of receiving the broadcast wave; a display step of displaying video on a display unit; an audio output step of outputting an audio signal to a plurality of speakers arranged outside the receiving device; comprising: When the audio signal included in the broadcast wave received in the receiving step does not have position information of the sound source, the output of the audio signal in the audio output step is based on the size of the display unit and the positional relationship information between the plurality of speakers. By setting the reproduction position of the sound source outside the display unit and outputting an audio signal so as to reproduce the sound source at the set reproduction position. Method for reproducing an audio signal.

12. A method for reproducing an audio signal in a receiving device that receives a broadcast wave including an audio signal, a receiving step of receiving the broadcast wave; an audio output step of outputting an audio signal to a speaker of the receiving device; a speaker registration step of registering another speaker in addition to the speaker arranged outside the receiving device; an instruction step of instructing output of an audio signal to the other speaker registered in the speaker registration step according to the display on the display unit; comprising: In the audio output step, the output of the audio signal to the speaker does not start outputting the audio signal to the other speaker immediately when the other speaker is registered in the speaker registration step, but after an instruction to output the audio signal to the other speaker is given in the instruction step. Start outputting the audio signal to the other speaker. Method for reproducing an audio signal.

13. A method for playing the audio signal in a receiving device that receives a broadcast wave containing an object-based audio signal, a receiving step of receiving the broadcast wave, an output step of outputting a signal based on the audio signal to an external device for the audio signal included in the broadcast wave received in the receiving step, comprising: the output of the signal to the external device in the output step can output the object-based audio signal as it is when the external device is indoors, but when the external device is outdoors, it is performed by outputting a signal obtained by mixing the object-based audio signal after rendering with a channel-based audio signal, a method for playing an audio signal.

14. A method for playing the audio signal in a receiving device capable of switching the playback configuration of the audio signal, an audio playback step of playing audio, a playback configuration switching step of switching the playback configuration of the audio playback in the audio playback step, comprising: when switching the playback configuration of the audio playback in the audio playback step in the playback configuration switching step, mute the audio playback before switching and unmute after switching, a method for playing an audio signal.

15. A method for playing the audio signal in a receiving device that receives a broadcast wave containing an audio signal, the audio signal included in the broadcast wave may include a channel-based audio signal and an object-based audio signal, or may include only a channel-based audio signal without an object-based audio signal, a receiving step of receiving the broadcast wave, an audio playback step of playing the audio signal included in the broadcast wave received in the receiving step, comprising: the playback of the audio signal in the audio playback step is performed by lowering the volume of the channel-based audio signal when the audio signal included in the broadcast wave includes both a channel-based audio signal and an object-based audio signal than when the audio signal included in the broadcast wave includes only a channel-based audio signal without an object-based audio signal, a method for playing an audio signal.

16. A method for playing the audio signal in a receiving device that receives a broadcast wave containing an audio signal in which the position information of the sound source is indicated in polar coordinates, a receiving step of receiving the broadcast wave, An audio output step of outputting an audio signal to a plurality of speakers arranged to form a plurality of cylindrical layers outside the receiving device; comprising; The output of the audio signal in the audio output step is performed by calculating a signal distribution coefficient for distributing the audio signal included in the broadcast wave received in the receiving step to the plurality of speakers based on virtual speakers distributed around each of the plurality of speakers for the audio signal included in the broadcast wave received in the receiving step, and outputting the audio signal generated based on the signal distribution coefficient to the plurality of speakers. A method for reproducing an audio signal.

17. An output control method in a receiving device capable of IP interface output using an IP interface, comprising: a receiving step of receiving a digital broadcast; an output control step of controlling IP interface output to an external device using the IP interface for the content included in the digital broadcast received in the receiving step; comprising; In the receiving step, control information for restricting the IP interface output, which is included in the digital broadcast and transmitted from the broadcast station side, is received; In the output control state in the output control step, there are a first state in which control is performed to prohibit output protected by DTCP via the IP interface from the receiving device based on the value of the control information, and a second state in which the value of the control information is ignored and IP interface output to an external device using the IP interface is controlled. An output control method.

18. An output control method in a receiving device capable of IP interface output using an IP interface, comprising: a receiving step of receiving a digital broadcast; an output control step of controlling IP interface output to an external device using the IP interface for the content included in the digital broadcast received in the receiving step; comprising; In the receiving step, control information for restricting the IP interface output, which is included in the digital broadcast and transmitted from the broadcast station side, is received; In the output control state in the output control step, there is a state in which the value of the control information is ignored and IP interface output to an external device using the IP interface is controlled. An output control method.

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