Audio signal reproduction method

Abstract

To satisfactorily transmit or receive an intelligent digital broadcast service.SOLUTION: An audio signal reproduction method in a broadcast receiving device comprises: a receiving step of receiving broadcast waves including an audio signal indicating position information of an audio source and metadata concerning the audio signal; and an audio reproduction step of reproducing the audio signal included in the broadcast waves received by the receiving step, based on the metadata concerning the audio signal. The metadata includes information indicating whether or not to permit non reproduction of the audio of the audio source.SELECTED DRAWING: Figure 2A

Description

Technical Field

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

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 achieved improvements in broadcast quality using error correction technology, multi-channeling and HD (High Definition) using compression encoding technology, 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] More than 10 years have passed since the start of the current digital broadcast service, and broadcast receiving devices 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 digital broadcasting services, 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-function 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, a method for reproducing an audio signal in a broadcast receiving apparatus, comprising: a receiving step of receiving a broadcast wave including an audio signal with source position information and metadata related to the audio signal; and an audio reproduction step of reproducing the audio signal included in the broadcast wave received in the receiving step based on the metadata related to the audio signal, wherein the metadata includes information indicating whether to permit not reproducing the audio of the sound source, may be used for the method of reproducing the audio signal.

Effect 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]

Figure 1

Figure 2A

Figure 2B

Figure 2C

Figure 2D

Figure 2E

Figure 2F

Figure 2G

Figure 2H

Figure 3A

Figure 3B

Figure 3C

Figure 3D

Figure 4A

Figure 4B

Figure 4C

Figure 4D

Figure 4E

Figure 4F

Figure 4G

Figure 4H

Figure 5A

Figure 5B

Figure 5C

Figure 5D

Figure 5E

Figure 5F

Figure 5G

Figure 5H

Figure 5I

Figure 5J

Figure 5K

Figure 6A

Figure 6B

Figure 6C

Figure 6D

Figure 6E

Figure 6F

Figure 6G

Figure 6H

Figure 6I

Figure 6J

Figure 7A

Figure 7B

Figure 7C

Figure 7D

Figure 7E

Figure 7F

Figure 7G

Figure 7H

Figure 7I

Figure 7J

Figure 7K

Figure 7L

Figure 8A

Figure 8B

Figure 8C

Figure 8D

Figure 9A

Figure 9B

Figure 9C

Figure 9D

Figure 9E

Figure 9F

Figure 9G

Figure 9H

Figure 9I

Figure 10A

Figure 10B

Figure 10C

Figure 10D

Figure 10E

Figure 10F

Figure 10G

Figure 10H

Figure 10I

Figure 10J

Figure 11A

Figure 11B

Figure 11C

Figure 11D

Figure 11E

Figure 12A

Figure 12B

Figure 13A

Figure 13B

Figure 13C

Figure 14A

Figure 14B

Figure 15A

Figure 15B

Figure 16

Figure 17A

Figure 17B

Figure 18

Figure 19

Figure 20A

Figure 20B

Figure 20C

Figure 21

Figure 22

Figure 23

Figure 24A

Figure 24B

Figure 24C

Figure 25

Figure 26

Figure 27

Figure 28A

Figure 28B

Figure 28C

Figure 29A

Figure 29B

Figure 30

Figure 31A

Figure 31B

Figure 32A

Figure 32B

Figure 33A

Figure 33B

Figure 33C

Figure 33D

Figure 34

Figure 35

Figure 36

Figure 37A

Figure 37B

Figure 38A

Figure 38B

Figure 38C

Figure 39

Figure 40

Figure 41

Figure 42

Figure 43

Figure 44

Figure 45

Figure 46

Figure 47A

Figure 47B

Figure 47C

Figure 47D

Figure 47E

Figure 48

Figure 49

Figure 50

Figure 51

Figure 52

Figure 53A

Figure 53B

Figure 54

Figure 55A

Figure 55B

Figure 55C

Figure 55D

Figure 55E

Figure 55F

Figure 56

Figure 57

Figure 58

Figure 59A

Figure 59B

Figure 60A

Figure 60B

Figure 60C

Figure 61A

Figure 61B

Figure 61C

Figure 61D

Figure 62A

Figure 62B

Figure 62C

Figure 63A

Figure 63B

Figure 63C

Figure 63D

Figure 63E

Figure 64

Figure 65

Figure 66

Figure 67

Mode 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 includes, for example, a broadcast receiving device 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. Furthermore, 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 acquiring additional content via the broadband network, performing arithmetic processing in a server device, and presentation processing through cooperation with a portable terminal device, in combination with the digital broadcast services. The broadcast receiving apparatus 100 receives digital broadcast waves transmitted from a radio tower 300 via an antenna 200. The digital broadcast waves 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. (not shown). 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 a 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. Further, the broadcasting station is provided with 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, and distributes content data and metadata provided from the broadcasting station server 400, as well as 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, and distribution, etc. of the content data and metadata, and the storage, management, and 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 operators. A plurality of 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 / demodulation unit 130C, a second tuner / demodulation unit 130T, a third tuner / demodulation unit 130L, a fourth tuner / demodulation 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, an audio selection unit 194, a speaker unit 195, and an audio 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 necessary for the operation of the broadcast receiving apparatus 100 and the like 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 in 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. Further, it can also store contents such as videos, still images, and audio obtained from a broadcast wave or downloaded via the Internet 800. A part 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 each of the 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 device on the Internet 800 or from a broadcast wave.

[0025] The LAN communication unit 121 is connected to the Internet 800 via the 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 the 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 included in 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 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 section 130C, the second tuner / demodulator section 130T, the third tuner / demodulator section 130L, and the fourth tuner / demodulator section 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 section 101. Further, it performs demodulation processing of the modulated wave of the received signal, waveform shaping processing, etc., as well as reconstruction 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 section 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 section 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. Further, the first tuner / demodulator section 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 section 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 dual-polarization terrestrial digital broadcasts, via the conversion unit 201T. Further, 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 used. Note that the antenna 200T for receiving the digital broadcast wave of dual-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 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] Further, 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 such as a building 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 capable of transmitting 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 divided part of the segments, it transmits a terrestrial digital broadcast service capable of transmitting 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 divided part of the segments, it transmits a terrestrial digital broadcast service capable of transmitting 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 part of the segment, the above-described current terrestrial digital broadcasting that transmits a video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels can be transmitted in the same modulation method. That is, in dual-polarization terrestrial digital broadcasting, in different segments of the plurality of polarization waves in each embodiment of the present invention, the current terrestrial digital broadcasting service that transmits a video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels and the terrestrial digital broadcasting service that can transmit a 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 a video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels in the same modulation method in a divided part of the segment. 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 a video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels and the terrestrial digital broadcasting service that can transmit a video with a maximum resolution of a pixel number exceeding horizontal 1920 pixels × vertical 1080 pixels can be transmitted simultaneously.

[0035] In addition, 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 digital broadcasting signals with different signal levels mean that the power for transmitting 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 transmit them 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, 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 in a plurality of layers with different signal levels.

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

[0038] The first decoder unit 140S and the second decoder unit 140U each receive a packet stream output 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, or a packet stream obtained 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), etc.

[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 for video data and audio data, acquisition of program information and EPG (Electronic Program Guide) generation processing, reproduction processing for data broadcast screens and multimedia data, etc. Also, a process of superimposing the generated EPG, the reproduced multimedia data, the decoded video data, and the 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 appropriate selection and / or superimposition processing 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, etc. 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. Also, 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 appropriate selection and / or mixing processing 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. Also, 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 output as it is the packet stream input by the first decoder unit 140S or the second decoder unit 140U 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. 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 (accumulation) 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 (accumulation) 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 and output according to various DTCP specifications such as the DTCP (Digital Transmission Content Protection) specification and the DTCP2 specification.

[0044] The extended interface unit 124 is a group of interfaces for extending 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 perform data transmission and reception. 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 perform data transmission and reception.

[0045] The operation input unit 180 is an instruction input unit that inputs 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) 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 on top of the monitor unit 192. It may also be replaced with a keyboard or the like connected to the extended 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 receiving 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 controlling 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, etc. based on the TMCC information and the like, and performs a demodulation process including frequency deinterleaving, time deinterleaving, carrier demapping processing, etc. 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 by broadcast waves having polarization directions different by approximately 90 degrees, 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 section 132H extracts the TMCC signal from the output signal of the station selection / detection section 131H to obtain various TMCC information. The TMCC decoder section 132V extracts the TMCC signal from the output signal of the station selection / detection section 131V to obtain various TMCC information. Either the TMCC decoder section 132H or the TMCC decoder section 132V may be used. The obtained TMCC information is used for the control of each subsequent process.

[0054] The demodulation sections 133H and 133V each input a modulated wave modulated by a method 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 sections 133H and 133V may be further compatible with modulation methods different from the above-mentioned modulation methods.

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

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

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

[0058] The channel selection / detection section 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 digital broadcast services (or different channels of the same broadcast service) in which the modulation wave of the upper layer (UL) and the modulation wave of the lower layer (LL) are different. Further, the modulation wave of the upper layer is output to the demodulator section 133S, and the modulation wave of the lower layer is output to the demodulator section 133L, respectively.

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

[0060] Since the demodulator section 133S and the demodulator section 133L perform the same operations as the demodulator section 133H and the demodulator section 133V, detailed descriptions thereof are omitted. Further, since the stream playback section 134S and the stream playback section 134L perform the same operations as the stream playback section 134H and the stream playback section 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 unit 130B.

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

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

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

[0064] The multiplex separation unit 143S is a stream decoder, which 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 (for example, 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. Further, 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 the packet stream acquired from the outside via the digital interface unit 125.

[0065] The video decoder 145S performs processes such as decoding of video information subjected to compression encoding, colorimetry conversion processing, and dynamic range conversion processing on the video data input from the multiplex separation unit 143S. Further, it performs processes such as resolution conversion (up / down conversion) based on the control of the main control unit 101, and outputs video data at resolutions such as UHD (3840 horizontal pixels × 2160 vertical pixels), HD (1920 horizontal pixels × 1080 vertical pixels), SD (720 horizontal pixels × 480 vertical pixels), etc. as appropriate. Video data output at other resolutions may also be performed. The audio decoder 146S performs processes such as decoding of audio information subjected to compression encoding. Further, it performs processes such as downmix processing based on the control of the main control unit 101, and outputs audio data with the number of channels such as 22.2ch, 7.1ch, 5.1ch, 2ch, etc. Note that a plurality of video decoders 145S and audio decoders 146S may be provided in order to perform decoding processes of video data and audio data 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 a process of releasing the encryption algorithm of a predetermined scrambling method based on various control information related to 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 the 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 an HTML document, and the multimedia screen generation process is executed by the HTML browser function.

[0072] The video decoder 145U, the audio decoder 146U, the superimposing unit 147U, the superimposing unit 148U, the superimposing unit 149U, the synthesizing unit 151U, and the selecting unit 150U are each components having the same functions as the video decoder 145S, the audio decoder 146S, the superimposing unit 147S, the superimposing unit 148S, the superimposing unit 149S, the synthesizing unit 151S, and the selecting unit 150S. If the S at the end of the reference numerals in the descriptions of the video decoder 145S, the audio decoder 146S, the superimposing unit 147S, the superimposing unit 148S, the superimposing unit 149S, the synthesizing unit 151S, and the selecting unit 150S in FIG. 2F is replaced with U, the descriptions of the video decoder 145U, the audio decoder 146U, the superimposing unit 147U, the superimposing unit 148U, the superimposing unit 149U, the synthesizing unit 151U, and the selecting unit 150U in FIG. 2G are obtained, so separate detailed descriptions are omitted.

[0073] [Software Configuration of Broadcast Receiver] FIG. 2H is a software configuration diagram of the broadcast receiver 100, and shows 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 other various 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 data created when each operation program is executed, as needed.

[0075] In the following, for the sake of simplicity, the process of the main control unit 101 expanding and executing the basic operation program 1001 stored in the storage (accumulation) unit 110 in the RAM 104 to control each operation block will be described as if the basic operation control unit 1101 controls 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 downmixing 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 or 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 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 delivery program 4003 stored in the storage unit 410 are each expanded into the RAM 404, and further, the main control unit 401 executes the expanded basic operation program, content management / delivery program, and content delivery program, thereby constituting a basic operation control unit 4101, a content management / delivery control unit 4102, and a content delivery 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 being performed by the basic operation control unit 4101 to control each operation block. The same description is made for other operation programs.

[0085] The content management / delivery control unit 4102 controls the management of content data, metadata, etc. stored in the content data storage area 4011 and the metadata storage area 4012, and the control when providing 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 delivery control unit 4103 performs time schedule management, etc. when sending out a stream including content data of a broadcast program stored in the content data storage area 4011, the program title of the broadcast program, the program ID, copy control information of the program content, etc. stored in the metadata storage area 4012, via the digital broadcast signal sending 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 is 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.) necessary 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 will be 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 the 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 an encoding circuit, a decoding circuit, etc.

[0095] [Hardware Configuration of Mobile Information Terminal] FIG. 3C is a block diagram showing an example of the internal configuration of the mobile information terminal 700. The mobile 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 mobile 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 mobile 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 mobile 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 integrated 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 instead.

[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. Further, 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 downloaded via the Internet 800. A part of the storage unit 710 may replace all or part of the functions of the ROM 703. Further, 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 each of the operation programs stored in the ROM 703 and the storage unit 710 can be added, updated, and functionally extended by a download process 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 the base station 600B of the 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. Further, 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 input of video signals / audio signals from an external video / audio output device, output of video signals / audio signals to an external video / audio input device, etc. 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 medium 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 reception unit 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, direction, movement of the portable information terminal 700, and 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 shooting videos, 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 for this embodiment, such as the sensor unit 760, etc. However, even if these components are not provided, the effects of this embodiment will not be impaired. Further, configurations not shown, such as a digital broadcast reception function and an electronic money settlement function, may be 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 and 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 needed.

[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. Further, 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. Further, each of the above 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 this embodiment adopt 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. Therefore, it is possible to realize an SFN (Single Frequency Network), and effective use of the 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. 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, and time interleaving length 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 of 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 example of the segment layer assignment 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-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, as the A layer, the mobile reception service of the current terrestrial digital broadcast can be transmitted in the above-mentioned one segment of the horizontal polarization. (Note that the mobile reception service of the current terrestrial digital broadcast may also be transmitted in the above-mentioned one segment of the vertical polarization. In this case, it is also treated as the A layer.) Also, as the B layer, in the above-mentioned seven segments of the horizontal polarization, a terrestrial digital broadcast service that transmits a video with a maximum resolution of the current terrestrial digital broadcast of 1920 pixels horizontally × 1080 pixels vertically 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 seven segments of the vertical polarization. In this case, it is also treated as the B layer.) Further, as the C layer, it may be configured to transmit an advanced terrestrial digital broadcast service capable of transmitting a video with a pixel number exceeding 1920 pixels horizontally × 1080 pixels vertically as the maximum resolution in a total of 10 segments, i.e., the above-mentioned five segments of both the horizontal polarization and the vertical polarization. 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 for transmitting 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 vertically. 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 for transmitting a video with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, which is the current terrestrial digital broadcast, is transmitted in 8 segments of the B layer, and an advanced terrestrial digital broadcast service capable of transmitting a video with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels vertically is transmitted 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 - dual - mode terrestrial digital broadcast according to this embodiment. For both the horizontal polarization and the vertical polarization, the same segment hierarchical assignment can be used. Specifically, as the A layer, the mobile - reception service of the current terrestrial digital broadcast can be transmitted in the above - mentioned 1 segment of the horizontal polarization. (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, it 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 horizontal pixels × 1080 vertical pixels can be configured to be transmitted in the above - mentioned 5 segments of both the horizontal polarization and the vertical polarization, a total of 10 segments. Also, as the C layer, the terrestrial digital broadcast service that transmits a video with a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels, which is the current terrestrial digital broadcast, can 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 horizontal pixels × 1080 vertical pixels may also be transmitted in the above - mentioned 7 segments of the vertical polarization. In this case, it 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] In addition, 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 with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels in the above 5 segments. In this case, in the B layer, a higher-efficiency carrier modulation method, error correction code method, video coding method, etc. than the current terrestrial digital broadcast are used. Further, as the C layer, a terrestrial digital broadcast service that transmits a video with 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 can be transmitted in one segment in the figure as the A layer. Further, as the B layer, it may be configured to transmit an advanced 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 a current terrestrial digital broadcast service for transmitting a video with 1920 horizontal pixels × 1080 vertical pixels as the maximum resolution in 12 segments in the figure. The transmission wave of the segment hierarchical assignment can be received, for example, by the third tuner / demodulation unit 130L of the broadcast receiver 100 of this embodiment. When used in the current terrestrial digital broadcast, the mobile reception service of the current terrestrial digital broadcast can 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, can 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 / demodulation unit 130C of the broadcast receiver 100 of this embodiment.

[0124] Fig. 4C shows an example of a system on the broadcasting station side 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 source encoding unit 411 encodes video / audio / various data, etc. respectively. The multiplexing / limiting reception processing unit 415 multiplexes the video / audio / various data, etc. encoded by the source encoding unit 411 respectively, and further appropriately executes processing corresponding to limiting reception, and outputs it as a packet stream. A plurality of source encoding units 411 and multiplexing / limiting 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 that realizes the generation process of the OFDM transmission wave, although the details of the source encoding and transmission path encoding methods are different. Therefore, among the plurality of source encoding units 411 and multiplexing / limiting reception processing units 415, some can be configured for terrestrial digital broadcast services of the ISDB - T system, and some can be configured for advanced terrestrial digital broadcast services, and the packet streams of a plurality of different terrestrial digital broadcast services can be multiplexed by the transmission path encoding unit 416. When the multiplexing / limiting reception processing unit 415 is configured for terrestrial digital broadcast services of the ISDB - T system, it is only necessary to generate MPEG - 2TS, which is a stream of TSP (Transport Stream Packet) defined in the MPEG - 2 systems. Also, when the multiplexing / limiting reception processing unit 415 is configured for advanced terrestrial digital broadcast services, it is only necessary to generate an MMT packet stream or a TLV stream including MMT packets, or a stream of TSP defined in other systems. Of course, all of the plurality of source encoding units 411 and multiplexing / limiting reception processing units 415 can be configured for advanced terrestrial digital broadcast services, and all the packet streams multiplexed by the transmission path encoding unit 416 can be packet streams for advanced terrestrial digital broadcast services.

[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) shows the configuration of the transmission path encoding unit 416 when generating only the OFDM transmission wave of digital broadcasting of the current terrestrial digital broadcasting 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 / limited reception processing unit 415 and subjected to remultiplexing processing is added with error correction redundancy, and various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving are performed. 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 broadcasting of the current terrestrial digital broadcasting service, there are two operating layers, but it is possible to transmit up to three layers. Therefore, FIG. 4D(1) shows an example of three layers.) The mapping processing is the modulation processing of the carrier. Also, the packet stream input from the multiplexing unit / limited 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 with 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 encoding unit 416 when generating an OFDM transmission wave for polarization - dual - use terrestrial digital broadcasting according to this embodiment. The OFDM transmission wave transmitted with 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 able to be processed separately for each layer such as layer A, layer B, and layer C. However, in the configuration example of FIG. 4D(2), not only the OFDM transmission wave of horizontal polarization (H) but also the OFDM transmission wave of vertical polarization (V) is generated, 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] For the processing such as outer code, inner code, and mapping shown in the configuration of FIG. 4D(2), in addition to the processing compatible with the configuration of FIG. 4D(1), more advanced processing not adopted in each processing of the configuration of FIG. 4D(1) can be used. 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 contrary, 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 not adopted in each processing of the configuration of FIG. 4D(1).

[0130] Note that in the polarization-duplex 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 described later, it is desirable to configure the processing such as outer code, inner code, and mapping applied to 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 that serves as the source of 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 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 that serves as the source of the layer that transmits 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, it is also possible to adopt the stream of TSP defined in the MPEG-2 systems in 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 that transmits 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. As a result, 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 the 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 that transmits 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 that can be suitably received and demodulated for digital broadcasts.

[0136] Note that 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 with 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 polarization-duplex 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 polarization-duplex 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 multiple 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 maximum resolution exceeding horizontal 1920 pixels × vertical 1080 pixels. For example, for processes such as outer coding, inner coding, 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 to, for example, 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. Or, it may transmit the mobile reception service of the current terrestrial digital broadcast in the A layer of 1 segment 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 the B layer of 12 segments. 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. The point that it is necessary to maintain the processing compatible with the current terrestrial digital broadcast in the layer that transmits the mobile reception service of the current terrestrial digital broadcast is the same as the explanation of 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 that transmits a video with a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels, which are 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, which are 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), a digital broadcast wave that can be suitably received and demodulated can be generated in a broadcast receiving apparatus corresponding to an advanced terrestrial digital broadcast service or in an existing terrestrial digital broadcast service receiving apparatus. 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 SFN and resistance to Doppler shift in mobile reception. Note that other modes with different numbers of carriers may be further 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, and it is possible to provide 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, and it is possible to make it less susceptible to 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 per segment of the OFDM segments identified in 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) having 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] Also, each numerical value of the number of carriers is such that 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 parameters underlined are parameters that are not compatible with the current terrestrial digital broadcast mobile reception service. Specifically, 256QAM, 1024QAM, and 4096QAM of the modulation method of the 'Data' carrier are 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, 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 broadcast 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 broadcast 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 broadcast 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 broadcast 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 processing 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 processing 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) of the OFDM broadcast wave generation processing according to FIGS. 4D(1), 4D(2), and 4D(3) of this embodiment. In the OFDM broadcast wave generation processing 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. The carriers of the OFDM transmission wave according to this embodiment include carriers for transmitting data such as video and audio, 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 in addition to their role as pilot signals, they are also used 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. The carriers for transmitting AC1, AC2, and TMCC shall be 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 for TMCC transmission defined 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 the 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 assignment 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 system is a common terrestrial digital audio broadcast 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 assignment of the system identification. 2 bits are assigned 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, '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, by transmitting broadcast waves by the polarization-duplex transmission method or single-polarization terrestrial digital broadcast or layer-division multiplex method, it is possible to simultaneously transmit 2K broadcast programs (broadcast programs of images with 1920 pixels horizontally × 1080 pixels vertically, and may include broadcast programs of images with lower resolutions) and 4K broadcast programs (broadcast programs of images exceeding 1920 pixels horizontally × 1080 pixels vertically, not limited to broadcast programs of images with 3840 pixels horizontally × 2160 pixels vertically) within the same service.

[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 set to 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 process 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, the 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 for 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 of 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 two polarizations 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 two polarizations 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 a plurality of polarizations.

[0163] Since the frequency conversion process identification bit is not defined in the current terrestrial digital broadcast, it will be ignored in the terrestrial digital broadcast receiving apparatus already used 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 the frequency conversion process or the frequency conversion amplification process 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. When the received broadcast wave is not the advanced terrestrial digital broadcast service, this parameter may be configured to be set to '1'.

[0165] FIG. 5G shows an example of bit assignment 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 broadcasting 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 broadcasting 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-assigned 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 being able to grasp the frequency band in which the OFDM transmission wave was transmitted in the air as a terrestrial digital broadcast wave.

[0166] In the case of the polarization - dual - use terrestrial digital broadcast according to this embodiment, in the generation process of the OFDM transmission wave on the broadcast station side, the physical channel number identification bits may be arranged for each of a plurality of polarization pairs in the bandwidth that originally constitutes 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 in 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, it will be impossible to demodulate the advanced terrestrial digital broadcast using both polarizations of the polarization - dual - use terrestrial digital broadcast. 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 that originally constituted one physical channel on the broadcast station side. As a result, it becomes possible to realize the demodulation of the advanced terrestrial digital broadcast of the polarization - dual - use terrestrial digital broadcast by using the plurality of transmission waves showing the same value.

[0167] FIG. 5H shows an example of the bit assignment of the main signal identification. This example is an example in which the bit of 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 the 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 the 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 end of the initial scan of the transmission wave transmitted by the main polarization, perform the initial scan on 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 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 an 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 the reverse of 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 at the time of transmission. For example, by using the identification process of the polarization direction, during the initial scan described later, the initial scan of the transmission wave transmitted in the horizontal polarization can be performed first, and after the completion of the initial scan of the transmission wave transmitted in the horizontal polarization, the initial scan of the transmission wave transmitted in the vertical polarization can be performed. Since the explanation of the effect of the process is the same as that of the part related to the initial scan in the explanation of the bits for main signal identification above, where'main polarization' is read as 'horizontal polarization' and'sub - polarization' is read as'vertical polarization', 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] Also, instead of the above-described main signal identification bit, the 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 has received 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 at the time of transmission. Note that the first signal second signal identification bit is only obtained by replacing the concepts of'main polarization' and'subordinate polarization' with 'first polarization' and'second polarization' from the definition of the above-described main signal identification bit, and the processing and effects in the broadcast receiving apparatus 100 are obtained by replacing'main polarization' with 'first polarization' and'subordinate polarization' with'second polarization' in the part related to the processing of the broadcast receiving apparatus 100 in the above description of the main signal identification bit, and thus repeated explanation is omitted.

[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 this embodiment, instead of the bits for the main signal identification described above, the upper and lower layer identification bits may be used as a 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 this embodiment, in the generation process of the OFDM transmission wave on the broadcast station side, among the plurality of modulated waves that were 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. When the broadcast receiving apparatus 100 receives 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 originally 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, an example in which 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 - use 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. One bit is allocated 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. One bit is allocated 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 the 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, this parameter may be set to '1' respectively.

[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 the bit assignment 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 on the sub-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 a D-layer transmission identification bit. When this parameter is '0', the B-layer transmitted on the secondary polarization is used as a 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 a virtual D-layer but is used as the B-layer.

[0186] Also, for example, the bit arranged at B121 is an E-layer transmission identification bit. When this parameter is '0', the C-layer transmitted on the secondary polarization is used as a 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 a 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 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 (for example, AC1), etc., on the broadcast receiving apparatus 100 side, it is possible to 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 bits and / or E layer transmission identification bits) 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, on the broadcast receiving apparatus 100 side, it is possible to 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] Also, 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, in principle, when the above - mentioned system identification parameter is not '10', all bits such as the bit for frequency conversion process identification, the bit for physical channel number identification, the bit for main signal identification, the bit for 4K signal transmission identification, and the bit for additional layer transmission identification should be set to '1'. Even if the system identification parameter is not '10', but exceptionally due to some problem, if the bit for frequency conversion process identification, the bit for physical channel number identification, the bit for main signal identification, the bit for 4K signal transmission identification, or the bit for additional layer transmission identification 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 error - correction coding rate identification.

[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, the LDPC code can be used as the inner code.

[0197] Therefore, different from the current terrestrial digital broadcasting system for 2K broadcasting, the bit for identifying the coding rate of error correction according to this embodiment shown in FIG. 5K is configured to be compatible not only with the convolutional code but also with 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 using the bits arranged in the common range as the identification bits for coding rate transmission, the saving of the number of bits is realized. Further, 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 options for coding rates 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 with a coding rate of 81 / 120. The coding rate 3 / 4 may be replaced with a coding rate of 89 / 120. The coding rate 5 / 6 may be replaced with a coding rate of 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 bits of the error correction method, which will be described later with reference to FIG. 6I.

[0202] According to the identification bits of the error correction coding rate 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 the frequency conversion process, the main signal identification, and the 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 the frequency conversion process, the main signal identification, the polarization direction identification, the first signal and second signal identification, the upper and lower layer identification, the 4K signal transmission layer identification, and the additional layer transmission identification 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 the signal of the carrier (such as TMCC carrier, AC carrier) modulated by the modulation method that performs mapping with fewer 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 a 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 a modulated wave can be transmitted using any AC carrier. FIG. 6A shows an example of the bit assignment 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 additional information regarding the transmission control of a modulated wave or earthquake early warning information.

[0206] FIG. 6B shows an example of the bit assignment 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 additional information regarding the transmission control of a 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 additional information regarding the transmission control of a modulated wave or earthquake early warning information.

[0208] The transmission of additional information regarding the transmission control of a modulated wave may be performed with various bit configurations. For example, the 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 assign bits to the additional information regarding the transmission control of the modulated wave of the AC signal and transmit it instead of or in addition to the TMCC signal. In this way, 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 addition information regarding the transmission layer of the 4K broadcast program when any one of the parameters of the 4K signal transmission layer identification is '0', or current / next information of the transmission parameters regarding the virtual D layer / virtual E layer when any one of the parameters of the additional layer transmission identification is '0' may be assigned. In this way, in the broadcast receiving apparatus 100, the transmission parameters of each layer can be obtained 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 allocation 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 is 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 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 is also '11'.

[0210] FIG. 6D shows an example of the bit allocation 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 is '000' or '001' or '010' or '011'. When the start / end flag is '11', the signal identification is '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 assignment 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 assignment of the earthquake motion warning detailed information when the signal identification is '111' is shown in FIG. 6F.

[0212] 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 the difference set cyclic code (273, 191) for B17 to B121 among the earthquake motion warning information.

[0213] In the broadcast receiving apparatus 100, it is possible to perform various controls for dealing 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 control for presenting information related to the earthquake motion warning, control for switching the display content with a low priority to the display related to the earthquake motion warning, control for ending the display of an application and switching 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, etc. The synchronization signal is composed of a 13-bit code and has the same code as 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 13 bits (B4 to B16) excluding the first 3 bits of the synchronization signal of the TMCC signal. When it is shown that the configuration identification of the AC signal transmits the additional information related to transmission control of the 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 at 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 at 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 at 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 at 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] Note that 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 parameter of the additional layer transmission identification in the TMCC information of 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 with reference to 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 an error correction method, parameters of a constellation format, and the like.

[0221] The error correction method indicates the setting of what encoding 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', when transmitting a 4K broadcast program in the B layer or the C layer, a convolutional code is used as the inner code, and a shortened RS code is used as the outer code. When this parameter is '001', when transmitting a 4K broadcast program in the B layer or the C layer, an LDPC code is used as the inner code, and a BCH code is used as the outer code. 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 and the like. Therefore, when the parameter of the constellation format is any one of '001' to '111', the broadcast receiving apparatus 100 of the present 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 (3840 horizontal pixels × 2160 vertical 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, the 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 allocated for the transmission of 2K (1920 horizontal pixels × 1080 vertical pixels) broadcast programs, 5 segments are allocated for the transmission of 4K broadcast programs, and 1 segment is allocated for mobile reception (so - called one - segment broadcasting). Further, for the 5 segments for 4K broadcasting, not only horizontal - polarized signals but also vertical - polarized 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 they can be received by current TV receivers. For 4K broadcast programs, image quality is ensured by optimizing more efficient HEVC compression technology than MPEG - 2 Video and increasing the modulation level, etc. 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 the transmission of broadcast waves 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 - polarized signals and vertical - polarized 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), transmission of a 2K broadcast program is performed using segments 1 to 7 (B layer) of the horizontally polarized signal. Transmission of a 4K broadcast program is performed using a total of 10 segments, namely segments 8 to 12 (C layer) of the horizontally polarized signal and segments 8 to 12 (C layer) of the vertically polarized signal. Segments 1 to 7 (B layer) of the vertically polarized signal may be used for transmission of the same broadcast program as the 2K broadcast program transmitted using segments 1 to 7 (B layer) of the horizontally polarized signal. Alternatively, segments 1 to 7 (B layer) of the vertically polarized signal may be used for transmission of a broadcast program different from the 2K broadcast program transmitted using segments 1 to 7 (B layer) of the horizontally polarized signal. Alternatively, segments 1 to 7 (B layer) of the vertically polarized signal may be used for other data transmission or may not be used. Identification information on how to use segments 1 to 7 (B layer) of the vertically polarized signal can be transmitted to the receiving device side by the parameters of the 4K signal transmission layer identification of the TMCC signal and the parameters of the additional layer transmission identification already described. In the broadcast receiving device 100, the handling of segments 1 to 7 (B layer) of the vertically polarized signal can be identified based on these parameters. 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 both the horizontal and vertical polarized signals may be simulcast for transmitting the same content broadcast program at different resolutions, or may be for transmitting broadcast programs of different contents. Segment 0 of both the horizontal and vertical polarized signals is used for transmission of the same one-segment broadcast program.

[0226] The example of (2) in Fig. 7A is a different modification from (1). In the example of (2), a 4K broadcast program is transmitted using 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. A 2K broadcast program is transmitted using segments 6 to 12 (C layer) of the horizontally polarized signal. Also in the example of (2), segments 6 to 12 (C layer) of the vertically polarized signal may be used for transmitting the same broadcast program as the 2K broadcast program transmitted by segments 6 to 12 (C layer) of the horizontally polarized signal, or may be used for transmitting a different broadcast program 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 repeated explanation is omitted.

[0227] Note that both examples (1) and (2) in Fig. 7A illustrate the case where the horizontal polarization is the main polarization. However, depending on the operation, the horizontal and vertical polarizations 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 - dual 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 - dual transmission method. The configuration of the broadcast system for the advanced terrestrial digital broadcast service using the polarization - dual transmission method is basically the same as the configuration of the broadcast system shown in Fig. 1. However, the radio tower 300T, which is equipment of the broadcast station, becomes a polarization - shared transmission antenna capable of simultaneously sending out horizontally polarized signals and vertically polarized signals. Also, in the example of Fig. 7B, the broadcast receiving apparatus 100 only extracts and describes the station - selecting / detecting section 131H and the station - selecting / detecting section 131V of the second tuner / demodulating section 130T, and omits the description of other operating sections.

[0229] The horizontally polarized wave signal transmitted from the radio tower 300T is received by the horizontally polarized wave 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 wave signal transmitted from the radio tower 300T is received by the vertically polarized wave 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 connecting 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 connect 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 wave signal or a vertically polarized wave signal may occur. In order to prevent the above-mentioned problems, one of the connector parts connecting the antenna (coaxial cable) and the TV receiver, for example, the coaxial cable 202T2 transmitting the vertically polarized wave signal and the connector part of the connector part 100F2, may be made into a connector part with a shape different from the F-type connector of the coaxial cable 202T1 transmitting the horizontally polarized wave signal and the connector part of the connector part 100F1. Alternatively, 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 wave signal or a vertically polarized wave signal by referring to the main signal identification of the TMCC information of each input signal. Also, instead of the two coaxial cables of the coaxial cable 202T1 and the coaxial cable 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-duplex transmission method according to an embodiment of the present invention. In the configuration shown in Fig. 7B, where the broadcast receiving apparatus 100 includes two broadcast signal input connector portions 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 portion 100F3 is split and input to the channel selection / detection unit 131H and the channel selection / detection unit 131V. The connector portion 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 (e.g., an apartment house, etc.) where the broadcast receiving apparatus 100 is installed. Alternatively, 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 the 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 as well, the frequency bands of both after frequency conversion need to be different from each other. Also, the broadcast receiving apparatus 100 only needs to include one broadcast signal input connector portion 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 be transmitted including the current terrestrial digital broadcast service 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 performing frequency conversion on 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] Further, 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 via 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 retransmission broadcast signals 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 have described the examples where the horizontal polarization is the main polarization, but 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 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 reproduced.

[0242] <Pass - through Transmission Method for 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 device constituting the receiving amplifier and frequency converter for performing the signal processing of the second method is an OFDM signal processor (OFDM Signal Processor: OFDM-SP).

[0244] Fig. 7E shows an example of the system configuration when the first method of the pass-through transmission method is applied to the advanced terrestrial digital broadcast service of the polarization multiplexing transmission method. Fig. 7E shows the head-end facility 400C of a cable television station and the broadcast receiving apparatus 100. 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 subsequent Figs. 7H and 7I have the same meaning.

[0245] For the polarization - multiplexed transmission method of the terrestrial digital broadcast service in 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 TV station, and the signal is transmitted 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 TV station, and after performing frequency conversion processing similar to the explanation in FIG. 7D (processing of converting the broadcast signal transmitted in the vertical polarization to a frequency band higher than the frequency band of 470 - 770 MHz corresponding to channels 13 - 62 of UHF), the signal is transmitted. 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 this embodiment. In the broadcast receiving apparatus 100 of this 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 explanation in FIG. 7D, so the explanation is omitted again.

[0246] FIG. 7G shows an example of the system configuration when applying the second method of the pass - through transmission method to the terrestrial digital broadcast service of the polarization - multiplexed transmission method. In FIG. 7G, the head - end facility 400C of the cable TV station and the broadcast receiving apparatus 100 are shown. Further, 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 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 TV station, and after performing frequency conversion processing to the frequency set by the CATV facility manager, the signal is transmitted. 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 TV station, and frequency conversion processing similar to the description of FIG. 7D (processing for converting the broadcast signal transmitted in the 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 transmitted. The frequency conversion processing shown in FIG. 7H is different from FIG. 7F in that the broadcast signal transmitted in the horizontal polarization does not remain in 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 as to expand the range to a lower frequency band and rearrange it in the range of 90 to 770 MHz. 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 with a single coaxial cable (or optical fiber cable). The transmitted signal can be received by the broadcast receiving apparatus 100 of the present embodiment. Since the processing 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 in the broadcast receiving apparatus 100 of the present embodiment is the same as the description of FIG. 7D, 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 are performed, and after performing the frequency conversion process to the frequency set by the CATV facility manager, transmission may be performed. In the example of Fig. 7I, frequency conversion is performed so that both the broadcast signal transmitted in horizontal polarization and the broadcast signal transmitted in vertical polarization are rearranged in the range of 90 to 770 MHz (the range from VHF1ch to UHF62ch). Since the frequency band exceeding UHF62ch is not used, the frequency band utilization efficiency of the broadcast signal is higher than that in Fig. 7H.

[0249] Also, since the band for rearranging the broadcast signal is wider than the frequency band of 470 to 710 MHz, which is the band of UHF channels 13 to 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 the present 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 in the case where horizontal polarization is the main polarization, but depending on the operation, the horizontal polarization and the vertical polarization may be reversed.

[0251] Regarding the broadcast wave of the polarization - dual - use transmission system that uses 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, a 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, and uses either a horizontal polarization signal or a vertical polarization signal to perform data transmission by SISO (Single - Input Single - Output) technology. For example, 13 segments within a bandwidth of about 6 MHz corresponding to one physical channel are divided, 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, 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 image quality is ensured by adopting technologies such as modulation multilevel 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 an 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 the 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) regarding the allocation example of 13 segments. In the example of (1), segments 1 to 4 (B layer) are used to transmit 4K broadcast programs. Segments 5 to 12 (C layer) are used to transmit 2K broadcast programs. 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 different modification from (1). In the example of (2), segments 1 to 8 (B layer) are used to transmit 2K broadcast programs. Segments 9 to 12 (C layer) are used to transmit 4K broadcast programs.

[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 sending out either a horizontally polarized signal or a vertically polarized signal. Also, in the example of FIG. 7K, the broadcast receiver 100 describes only the channel 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 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 preferable.

[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 becomes 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.

[0258] Fig. 7L shows a configuration of a broadcast system for a digital terrestrial television service using a single-polarization transmission method according to an embodiment of the present invention, which is an example of a configuration serving as the aforementioned double tuner. This shows both the transmission-side system and the reception-side system of a digital terrestrial television service using a single-polarization transmission method. The configuration of the broadcast system for a digital terrestrial television service using a 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. 7L, the broadcast receiver 100 describes 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, and the description of other operating units is omitted.

[0259] The single-polarization signal transmitted from the radio tower 300S is received by the antenna 200S, which is a single-polarization receiving antenna, and is input to the broadcast receiver 100 from the connector unit 100F3 via the coaxial cable 202S. The single-polarization signal input to the broadcast receiver 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 digital terrestrial television service is performed, and in the station selection / detection unit 131H, station selection / detection processing for the broadcast wave of the digital terrestrial television service is performed.

[0260] With such a configuration, in a broadcast system that provides both the current digital terrestrial television service and the digital terrestrial television service, it becomes possible to receive the current digital terrestrial television service and the digital terrestrial television service simultaneously. In particular, efficient processing is possible at the channel setting or the like. Note that the current digital terrestrial television service and the digital terrestrial television service may be transmitted using the same physical channel or may be transmitted using different physical channels. Also, the current digital terrestrial television service and the digital terrestrial television service may be a pair of simulcast services or may not be a pair.

[0261] 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 method. However, the same configuration can also be applied to the case of receiving a broadcast service of an advanced terrestrial digital broadcast service using a dual-polarization transmission method. In this case, the dual-polarization signal received by the antenna 200T, which is an antenna for receiving both polarizations, and input from the connector unit 100F3 to the broadcast receiving apparatus 100 via the conversion unit 201T may be split and input to the tuning / detection unit 131C, the tuning / detection unit 131H, and the tuning / detection unit 131V, respectively. The 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 the tuning / detection unit 131H and the 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.

[0262] [Transmission Method 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-described transmission method of the advanced terrestrial digital broadcast service according to the embodiment of the present invention, a hierarchical division multiplexing transmission method will be described. The hierarchical division multiplexing transmission method according to the embodiment of the present invention is a method having some specifications in common with the current terrestrial digital broadcast method. For example, a broadcast wave of a 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 the 2K broadcast, the reception level of the 4K broadcast is suppressed below the required C / N, and reception is performed as before. For the 4K broadcast, while expanding the transmission capacity by modulation multi-valuing or the like, a reception technique corresponding to the LDM (hierarchical division multiplexing) technique is used to cancel the 2K broadcast wave and perform reception with the remaining 4K broadcast wave.

[0263] 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 a modulated wave of current 2K broadcast, the lower layer is composed of a modulated wave of 4K broadcast, 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 level of the upper layer and the modulated wave level of the lower layer is called the injection level (IL: Injection Level), which is a value set on the broadcast station side. The injection level is generally expressed as a relative ratio (dB) in logarithmic expression of the difference (power difference) of the modulated wave levels.

[0264] FIG. 8B shows an example of the configuration of a broadcast system of 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 of 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. Further, in the example of FIG. 8B, the broadcast receiving apparatus 100 describes only the channel selection / detection unit 131L of the channel selection / demodulation unit 130L, and omits the description of other operation units.

[0265] The broadcast signal received by the antenna 200L is input from the connector section 100F4 to the channel selection / detection section 131L via the conversion section (converter) 201L and the coaxial cable 202L. Here, when the broadcast signal is transmitted from the antenna 200L to the broadcast receiving apparatus 100 with the above configuration, as shown in FIG. 8C, in the conversion section 201L, frequency conversion amplification processing may be performed on the broadcast signal. That is, when the antenna 200L is installed on the rooftop of an apartment building or the like and the broadcast signal is transmitted to the broadcast receiving apparatus 100 in each room through 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 section 131L.

[0266] Therefore, in order to prevent the above problems, in the conversion section 201L, frequency conversion amplification processing is performed 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 exceeding 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 the interference between the 2K broadcast signal and the 4K broadcast signal and also avoid the influence of attenuation of the broadcast signal during transmission through the coaxial cable. 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 section 201L and the frequency conversion amplification processing may be unnecessary.

[0267] 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 or the like.

[0268] Also, the frequency band after conversion by the frequency conversion amplification process is preferably 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). The bandwidth of the region between the frequency band before conversion and the frequency band after conversion by the frequency conversion amplification process is preferably 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, the description will not be repeated.

[0269] 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 / lower layer identification bit of the TMCC information described with reference to FIG. 5H. Further, the broadcast receiver 100 of this embodiment can identify whether the received broadcast signal has been frequency-converted after antenna reception by using the frequency conversion processing identification bit of the TMCC information described with reference to 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 bit of the TMCC information described with reference to 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 above-described parameters of the TMCC information, for example, the initial scan of the broadcast receiver 100 can be made faster.

[0270] 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 has a reception function corresponding to the LDM (layer division multiplexing) technology as already described. Therefore, the conversion unit 201L shown in FIG. 8B is not necessarily required between the antenna 200L and the broadcast receiver 100.

[0271] Note that the broadcast wave of the terrestrial digital broadcast transmitted by the layer division multiplexing transmission method described above can be received and reproduced 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 reproduced.

[0272] [MPEG-2 TS format] The broadcast system of this embodiment can support MPEG-2 TS, which is adopted in current terrestrial digital broadcast services and other services as a media transport method 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 / demodulation unit 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 / demodulation unit 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 / demodulation unit 130L, the format of the stream corresponding to the layer where the current terrestrial digital broadcast service is transmitted is MPEG-2 TS.

[0273] 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 obtaining additional content via the broadband network, performing arithmetic processing in a server device, and presenting processing in cooperation with a mobile terminal device, in combination with digital broadcast services.

[0274] 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.

[0275] [Control Signal for Broadcast System Using 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.

[0276] [Tables Used for Program Arrangement Information] Fig. 9B shows a list of tables used for program arrangement information in a broadcast system in the MPEG-2 TS format. In this embodiment, the following tables are used as tables for program arrangement information.

[0277] (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)

[0278] (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

[0279] <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.

[0280] (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) Table set by the operator

[0281] <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 the descriptors for the program arrangement information.

[0282] (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

[0283] (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

[0284] (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

[0285] (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

[0286] (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

[0287] (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

[0288] (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

[0289] <Descriptor Used in Digital Broadcasting> Fig. 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.

[0290] (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

[0291] <Descriptor Used in INT Figure 9H shows a list of descriptors used in the INT of an MPEG-2 TS broadcast system. In this embodiment, the following descriptors are used as descriptors used in the 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 the INT.

[0292] (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

[0293] <Descriptors 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 in the 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 the INT.

[0294] (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) Descriptors Set by the Operator

[0295] [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 generally the MMT method. Also, among the streams obtained by demodulating the transmission wave in the second tuner / demodulation unit 130T of the broadcast receiving apparatus 100 in FIG. 2, the stream method corresponding to the layer where advanced terrestrial digital broadcast services are transmitted is generally MMT. Similarly, among the streams obtained by demodulating the transmission wave in the third tuner / demodulation unit 130L, the stream method corresponding to the layer where advanced terrestrial digital broadcast services are transmitted is generally MMT. 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 in the fourth tuner / demodulation unit 130B is MMT.

[0296] The MMT method is a newly formulated media transport method because the functions of the MPEG-2 TS method have limitations in the face of 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.

[0297] 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, packetized by MMTP, and transmitted by 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, packetized by MMTP, and transmitted by IP packets.

[0298] For the transmission of MMTP packets, UDP / IP (User Datagram Protocol / Internet Protocol) is used for broadcast transmission channels, and UDP / IP or TCP / IP (Transmission Control Protocol / Internet Protocol) is used for communication lines. Also, in the broadcast transmission channel, the TLV multiplexing method may be used for efficient transmission of IP packets.

[0299] Figure 10A shows the protocol stack of MMT in the broadcast transmission channel. Also, Figure 10B shows the protocol stack of MMT in the communication line. In the MMT system, a mechanism for transmitting two types of control information, MMT-SI and TLV-SI, is provided. MMT-SI is control information indicating the configuration of a broadcast program, etc. It is in the form of a control message of MMT, placed on the MMTP payload, packetized into an MMTP packet, and transmitted as an IP packet. TLV-SI is control information related to the multiplexing of IP packets, providing information for channel selection and the correspondence information between IP addresses and services.

[0300] [Control Signal of Broadcast System Using MMT Method] As described above, in the MMT system, TLV-SI and MMT-SI are provided as control information. TLV-SI is composed of a table and a descriptor. The table is transmitted in section format, and the descriptor is placed within the table. MMT-SI is composed of three layers: a message for storing tables and descriptors, a table with elements and attributes indicating specific information, and a descriptor indicating more detailed information.

[0301] [Table Used in TLV-SI] Figure 10C shows a list of tables used in TLV-SI of the MMT broadcast system. In this embodiment, the following tables are used as TLV-SI tables. Also, tables synonymous with the tables shown in Figures 9B and 9C may be further used.

[0302] (1) Network Information Table for TLV (2) Address Map Table (3) Table set by the operator

[0303] <Descriptor used in TLV-SI> Fig. 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 the descriptors of TLV-SI. Also, descriptors synonymous with the descriptors shown in Fig. 9D, Fig. 9E, Fig. 9F, Fig. 9G, Fig. 9H, and Fig. 9I may be further used.

[0304] (1) Service List Descriptor (2) Satellite Delivery System Descriptor (3) System Management Descriptor (4) Network Name Descriptor (5) Remote Control Key Descriptor (6) Descriptor set by the operator

[0305] (Message used in MMT-SI) Fig. 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 the messages of MMT-SI.

[0306] (1) PA (Package Access) message (2) M2 section message (3) CA message (4) M2 short section message (5) Data transmission message (6) Message set by the operator

[0307] 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 the MMT-SI tables. Also, tables synonymous with the tables shown in FIGS. 9B and 9C may be further used.

[0308] (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)

[0309] (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

[0310] <Descriptors Used in MMT-SI> Figures 10G, 10H, and 10I show a list of descriptors used in the MMT-SI of the MMT-based broadcast system. In this embodiment, the following descriptors are used as the descriptors of MMT-SI. Further, descriptors synonymous with the descriptors shown in FIGS. 9D, 9E, 9F, 9G, 9H, and 9I may also be used.

[0311] (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

[0312] (11) MH-MPEG-4 Audio Descriptor (12) MH-MPEG-4 Audio Extension Descriptor (12) 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

[0313] (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

[0314] (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

[0315] (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

[0316] (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

[0317] (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

[0318] <Relationship between Data Transmission and Each Control Information in the MMT System> Figure 10J shows the relationship between data transmission and typical tables in the MMT broadcast system.

[0319] In the MMT broadcast system, data can be transmitted 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 which is a data flow of IP packets. The IP data flow includes a video asset containing a series of video MPUs and an audio asset containing a series of audio MPUs. Furthermore, a subtitle asset containing a series of subtitle MPUs, a character super asset containing a series of character super MPUs, a data asset containing a series of data MPUs, etc. may also be included. These various assets are associated in package units by the MPT (MMT Package Table) stored in the 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.

[0320] The assets that make up the package can be only the assets within the TLV stream, but as shown in FIG. 10J, assets transmitted in the IP data flow of the communication line can also be included. 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 within the IP data flow (6) Data at the specified URL etc., it is possible to specify various data transmitted through various transmission paths.

[0321] 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.).

[0322] [Channel Setting Process of Broadcast Receiving Apparatus] <Initial Scan> In the current terrestrial digital broadcast, the network ID is different for each transmission master, and it is common that information of other stations is not described in the NIT. Therefore, the broadcast receiving apparatus 100 according to an embodiment of the present invention, which has compatibility with the current terrestrial digital broadcast, searches (scans) all receivable channels at the reception point for the terrestrial digital broadcast according to an embodiment of the present invention (advanced terrestrial digital broadcast, or terrestrial digital broadcast in which the advanced terrestrial digital broadcast and the current terrestrial digital broadcast are simultaneously transmitted in different layers), and needs to have a function of creating a service list (receivable frequency table) based on the service ID. In addition, in an area where the same network ID can be received on different physical channels by MFN (Multi Frequency Network), it is basically sufficient 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.

[0323] In addition, in the advanced BS digital broadcast or advanced CS digital broadcast received by the fourth tuner / demodulator 130B of the broadcast receiving apparatus 100 according to an embodiment of the present invention, the broadcast receiving apparatus 100 may acquire and store the service list stored in the TLV-NIT, and there is no need to create the service list. Therefore, for the advanced BS digital broadcast or advanced CS digital broadcast received by the fourth tuner / demodulator 130B, the initial scan and the rescan described later are unnecessary.

[0324] <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, a new relay station installation, or a change in the reception point of a television receiver. When changing the preset information, the broadcast receiving apparatus 100 can notify the user to that effect.

[0325] <Operation example during initial scan / rescan> FIG. 11A shows an example of the operation sequence of the channel setting process (initial scan / re-scan) of the broadcast receiving apparatus 100 according to an embodiment of the present invention. In the figure, an example is shown in the case where MPEG-2 TS is adopted as the media transport method, but the same processing basically applies when the MMT method is adopted.

[0326] In the channel setting process, first, the receiver function control unit 1102 performs the setting of the residential area (selection of the area where the broadcast receiving apparatus 100 is installed) based on the user's instruction (S101). At this time, instead of the user's instruction, the setting of the residential area may be automatically performed 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 information may be acquired from the network to which the LAN communication unit 121 is connected, or the information regarding the installation position may be acquired from the external device to which the digital interface unit 125 is connected. Next, the 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).

[0327] The tuner / demodulation unit executes tuning based on the instruction (S103), and if the lock to the set frequency is successful (S103: Yes), the process proceeds to the process of S104. If the lock is not successful (S103: No), the process proceeds to the process of S111. In the process of S104, the C / N is confirmed (S104). 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 the reception confirmation process 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.

[0328] In the reception confirmation process, the reception function control unit 1102 first obtains the BER of the received broadcast wave (S105). Next, by obtaining and collating the NIT, it is confirmed whether the NIT is valid data (S106). If the NIT obtained in the process of S106 is valid data, the reception function control unit 1102 obtains 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 obtained from the terrestrial distribution system descriptor. Also, a list of service IDs is obtained from the service list descriptor.

[0329] Next, the reception function control unit 1102 checks the service list stored in the receiving apparatus to confirm whether the transport stream ID obtained in the process of S106 has already been obtained (S107). If the transport stream ID obtained in the process of S106 has not been obtained yet (S107: No), the various pieces of information obtained in the process of S106 are associated with the transport stream ID and added to the service list (S108). If the transport stream ID obtained in the process of S106 has already been obtained (S107: Yes), the BER obtained in the process of S105 is compared with the BER at the time when the transport stream ID described in the service list was obtained (S109). As a result, if the BER obtained in the process of S105 is better (S109: Yes), the service list is updated with the various pieces of information obtained in the process of S106 (S110). If the BER obtained in the process of S105 is not better (S109: No), the various pieces of information obtained in the process of S106 are discarded.

[0330] Also, in the above-described service list creation (addition / update) process, the remote control key ID may be obtained 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.

[0331] 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.

[0332] 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.

[0333] 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.

[0334] In addition, 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 a current terrestrial digital broadcast service, it is controlled to scan a frequency range of 470 to 770 MHz (corresponding to channels 13 to 62 of physical channels). 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 perform a frequency value up of +6 MHz.

[0335] 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 of performing the frequency conversion process shown in FIG. 7D and the frequency conversion amplification process shown in FIG. 8C). 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 perform a frequency value up of +6 MHz. In addition, 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 the system identification of the TMCC information, the frequency conversion process identification, and the like.

[0336] Also, when the broadcast system according to an 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 using a polarization multiplexing transmission method, 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 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 etc. 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.

[0337] Similarly, when the broadcast receiving apparatus 100 has a configuration shown in FIG. 8B and further includes a plurality of tuner / demodulation units (channel selection / detection units), that is, a so-called double tuner configuration (for example, a configuration including a plurality of third tuner / demodulation units 130L or a configuration shown in FIG. 8D), and is receiving an advanced terrestrial digital broadcast service using a hierarchical division multiplexing transmission method, 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 in the above description.

[0338] 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 scan the frequency range in which the current terrestrial digital broadcast service is transmitted, and the third tuner / demodulator 130L may scan the other frequency range in parallel. 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 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), with the third tuner / demodulator 130L before starting the operation sequence of the initial scan / rescan, and obtaining the TMCC information transmitted at each frequency and referring to the parameters (for example, system identification parameters) stored in the TMCC information.

[0339] In the case of a high-definition terrestrial digital broadcast service using a polarization-duplex transmission method, for example, in the case of a channel having a broadcast program that uses both a horizontal polarization signal and a vertical polarization signal, 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 listed 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, even if the same transport ID is detected, it may be stored in the service list as one channel. That is, in the same layer transmitted with different polarizations, when the same broadcast program is transmitted, it is merged and recognized as 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 in different channels.

[0340] On the other hand, in the case of a high-definition terrestrial digital broadcast service using a 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), it is 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 in the broadcast receiving apparatus 100.

[0341] [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 by a one-touch key of a remote control, channel up / down selection by a channel up / down key of the remote control, and direct selection by direct input of a three-digit number using the numeric keypad of 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 / rescan. After channel selection, information on the selected channel (the three-digit number used for direct selection, sub-channel 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 banner display or the like. In this way, the user can visually obtain the 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.

[0342] <Example of processing for one-touch channel selection> (1) By pressing the one-touch key of the remote control, select the service with the'service_id' specified by'remote_control_key_id'. (2) Set the last mode and display the channel information after channel selection.

[0343] <Example of up / down channel selection using the channel up / down buttons> (1) By pressing the channel up / down key of the remote control, 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 display the channel information after channel selection.

[0344] <Example of direct channel selection processing> (1) When direct channel selection is selected, it enters a state waiting 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) When the channel exists, it performs the channel selection process, sets the last mode, and displays the channel information after channel selection.

[0345] Note that the channel selection operation is based on SI, and when it is determined that the broadcast is suspended, it may also have a function to display that fact and notify the user.

[0346] <Remote controller of the broadcast receiving device> FIG. 12A shows an example of the external view of a remote controller (remote control) used for inputting operation instructions for the broadcast receiving device 100 according to an embodiment of the present invention.

[0347] The remote controller 180R includes a power key 180R1 for turning on / off the power (standby on / off) of the broadcast receiving device 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.

[0348] 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 also used as 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.

[0349] In addition, the remote controller 180R is provided with an EPG key 180R9 for displaying the program guide and a menu key 180RA for displaying the 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 return key 180R4.

[0350] 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 return key 180R4, and the color keys 180RD.

[0351] 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 the audio output and a mute key 180RI for switching the on / off of the audio output.

[0352] <Example of Network Switching Process by High-Definition Digital Keys> The remote control 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, selection of 4K broadcast programs is prioritized when selecting a channel, and when the 'digital key' is pressed, 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 the 4K broadcast program is possible, by pressing the 'digital key', control such as forcibly selecting a 2K broadcast program becomes possible. Also, in a case where 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 the 4K broadcast program is possible, even when the 'high-definition digital key' is pressed, a 2K broadcast program (simulcast of the selected 4K broadcast program) may be selected.

[0353] <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.

[0354] FIG. 12B shows an example of a banner display during channel selection. The banner display 192A1 is an example of a banner display that is shown when a 2K broadcast program is selected. 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 on the remote control, the service logo, and a three-digit number. The banner display 192A2 is an example of a banner display that is shown when a 4K broadcast program is selected. For example, in addition to each piece of information similar to the aforementioned banner display 192A1, a symbolized mark of "High" indicating that the program being received 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.

[0355] 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.

[0356] According to the system of the advanced digital broadcast service having some or all of the functions of each of the functions according to the embodiments of the present invention described above...

Claims

1. A method for playing an audio signal in a broadcast receiving device, comprising: a receiving step of receiving a broadcast wave including an audio signal with source position information and metadata related to the audio signal; an audio playback step of playing the audio signal included in the broadcast wave received in the receiving step based on the metadata related to the audio signal; wherein the metadata includes information indicating whether to permit playing the audio of the source; a method for playing an audio signal.

2. A method for playing an audio signal in a broadcast receiving device, comprising: a receiving step of receiving a broadcast wave including an audio signal with source position information and metadata related to the audio signal; an audio playback step of playing the audio signal included in the broadcast wave received in the receiving step based on the metadata related to the audio signal; wherein the metadata includes information indicating whether the audio of the source is a human voice; a method for playing an audio signal.

3. A method for playing an audio signal in a broadcast receiving device, comprising: a receiving step of receiving a broadcast wave including an audio signal with source position information and metadata related to the audio signal; an audio playback step of playing the audio signal included in the broadcast wave received in the receiving step based on the metadata related to the audio signal; wherein the metadata includes information indicating the spread degree of the audio of the source; a method for playing an audio signal.

4. In the method for playing an audio signal according to Claim 3, when the information indicating the spread degree of the audio of the source included in the metadata indicates that spread processing of the source is to be performed, the metadata further includes information indicating the maximum amount of energy distribution of the source signal for one speaker, and the playback of the audio signal in the audio playback step limits the source amount of the source signal input to one speaker based on the maximum amount of energy distribution of the source signal for one speaker, and distributes the remaining source amount after the limitation of the source amount to surrounding speakers; a method for playing an audio signal.

5. A method for playing an audio signal in a broadcast receiving device, comprising: a receiving step of receiving a broadcast wave including an audio signal with source position information and metadata related to the audio signal; an audio playback step of playing the audio signal included in the broadcast wave received in the receiving step based on the metadata related to the audio signal; wherein The metadata includes information indicating which of the sound sources is the original sound source of the content among the sound sources. A method for playing an audio signal.

Images