Broadcast receiving device and transmission wave processing method

Abstract

The present invention provides a broadcast receiving device and a method for processing transmission waves. The present invention comprises: a tuner for receiving a transmission wave, wherein the transmission wave contains identification information capable of identifying a frequency band of the transmission wave when transmitted over the air, contained in a carrier modulated using a modulation method different from that of a data carrier; and a control unit for identifying the frequency band of the transmission wave when transmitted over the air, using the identification information contained in the transmission wave received by the tuner.

Description

Technical Field

[0001] The present invention relates to a broadcast sending technology or a broadcast receiving technology. Background Art

[0002] Digital broadcasting services began to replace existing analog broadcasting services in various countries in the late 1990s. These services have enabled improvements in broadcast quality using error correction technology, multi-channel and HD (High Definition) broadcasting using compression coding technology, and multimedia services using BML (Broadcast Markup Language) and HTML5 (Hypertext Markup Language version 5).

[0003] In recent years, research on advanced digital broadcasting systems has been conducted in various countries for the purpose of further improving frequency utilization efficiency, achieving higher resolutions, and advancing functions.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2016-14420 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] Current digital broadcasting services have been in operation for over 10 years, and broadcast receivers capable of receiving these services are now widely available. Therefore, when launching advanced digital broadcasting services currently under development, compatibility with existing digital broadcasting services must be considered. Specifically, it is desirable to maintain the viewing environment of existing digital broadcasting services while simultaneously achieving UHD (Ultra High Definition) video signals.

[0009] 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 replaces the current digital broadcasting and does not consider maintaining the viewing environment of the current digital broadcasting services.

[0010] An object of the present invention is to provide a technology for better transmitting or receiving advanced digital broadcast services with more advanced functions, taking into account compatibility with existing digital broadcast services.

[0011] Technical solutions to problems

[0012] As a technical solution for solving the above-mentioned problems, the technology described in the scope of claims is used.

[0013] For example, it can be constructed to include: a tuner for receiving a transmission wave, wherein the transmission wave stores identification information that can identify the frequency band of the transmission wave when it is transmitted in the air in a carrier modulated in a modulation method different from that of the data carrier; and a control unit, which uses the identification information contained in the transmission wave received by the tuner to identify the frequency band of the transmission wave when it is transmitted in the air.

[0014] Effects of the Invention

[0015] According to the present invention, it is possible to provide a technology for better transmitting or receiving advanced digital broadcasting services. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a system structure diagram of a broadcasting system according to an embodiment of the present invention.

[0017] Figure 2A It is a block diagram of a broadcast receiving apparatus according to one embodiment of the present invention.

[0018] Figure 2B This is a detailed block diagram of a first modem unit of a broadcast receiving device according to one embodiment of the present invention.

[0019] Figure 2C This is a detailed block diagram of the second modem unit of the broadcast receiving device according to one embodiment of the present invention.

[0020] Figure 2D This is a detailed block diagram of the third modem unit of the broadcast receiving device according to one embodiment of the present invention.

[0021] Figure 2E This is a detailed block diagram of a fourth modem unit of a broadcast receiving device according to an embodiment of the present invention.

[0022] Figure 2F This is a detailed block diagram of the first decoder section of the broadcast receiving device according to one embodiment of the present invention.

[0023] Figure 2G This is a detailed block diagram of the second decoder unit of the broadcast receiving device according to one embodiment of the present invention.

[0024] Figure 2H It is a software structure diagram of a broadcast receiving device according to an embodiment of the present invention.

[0025] Figure 3A It is a structural diagram of a broadcast station server according to an embodiment of the present invention.

[0026] Figure 3BFIG. 4 is a structural diagram of a service operator server according to an embodiment of the present invention.

[0027] Figure 4A This is a diagram illustrating a segment structure of digital broadcasting according to an embodiment of the present invention.

[0028] Figure 4B This is a diagram illustrating layers in layered transmission of digital broadcasting according to an embodiment of the present invention.

[0029] Figure 4C This is a diagram illustrating a process of generating an OFDM transmission wave for digital broadcasting according to an embodiment of the present invention.

[0030] Figure 4D This is a diagram illustrating a basic structure of a channel coding unit for digital broadcasting according to an embodiment of the present invention.

[0031] Figure 4E This is a diagram illustrating segment parameters of the OFDM method of digital broadcasting according to one embodiment of the present invention.

[0032] Figure 4F This is a diagram illustrating transmission signal parameters of digital broadcasting according to one embodiment of the present invention.

[0033] Figure 4G This is a diagram illustrating the arrangement of pilot signals in a synchronous modulation segment of digital broadcasting according to one embodiment of the present invention.

[0034] Figure 4H This is a diagram illustrating the arrangement of pilot signals in a differential modulation section of digital broadcasting according to one embodiment of the present invention.

[0035] Figure 5A This is a diagram illustrating bit allocation of a TMCC carrier in digital broadcasting according to one embodiment of the present invention.

[0036] Figure 5B This is a diagram illustrating bit allocation of TMCC information in digital broadcasting according to one embodiment of the present invention.

[0037] Figure 5C This is a diagram illustrating transmission parameter information of TMCC information in digital broadcasting according to one embodiment of the present invention.

[0038] Figure 5D This is a diagram illustrating a system identifier of TMCC information of digital broadcasting according to an embodiment of the present invention.

[0039] Figure 5E This is a diagram illustrating a carrier modulation mapping method of TMCC information in digital broadcasting according to one embodiment of the present invention.

[0040] Figure 5FThis is a diagram illustrating a frequency conversion process identifier of TMCC information in digital broadcasting according to one embodiment of the present invention.

[0041] Figure 5G This is a diagram illustrating a physical channel number identifier of TMCC information of digital broadcasting according to one embodiment of the present invention.

[0042] Figure 5H This is a diagram illustrating an example of a main signal identifier of TMCC information in digital broadcasting according to one embodiment of the present invention.

[0043] Figure 5I This is a diagram illustrating a 4K signal transmission layer identifier of TMCC information of digital broadcasting according to an embodiment of the present invention.

[0044] Figure 5J This is a diagram illustrating an additional layered transmission identifier for TMCC information in digital broadcasting according to an embodiment of the present invention.

[0045] Figure 6A This is a diagram illustrating bit allocation of a digital broadcast AC signal according to one embodiment of the present invention.

[0046] Figure 6B This is a diagram illustrating a structure identifier of an AC signal of digital broadcasting according to an embodiment of the present invention.

[0047] Figure 6C This is a diagram illustrating earthquake warning information in a digital broadcast AC signal according to one embodiment of the present invention.

[0048] Figure 6D This is a diagram illustrating a signal identifier of earthquake warning information in a digital broadcast AC signal according to one embodiment of the present invention.

[0049] Figure 6E This is a diagram illustrating earthquake warning detailed information of earthquake warning information in a digital broadcast AC signal according to one embodiment of the present invention.

[0050] Figure 6F This is a diagram illustrating earthquake warning detailed information of earthquake warning information in a digital broadcast AC signal according to one embodiment of the present invention.

[0051] Figure 6G This figure illustrates additional information regarding transmission control of a modulated wave of an AC signal of digital broadcasting according to one embodiment of the present invention.

[0052] Figure 6H This is a diagram illustrating transmission parameter additional information of a digital broadcast AC signal according to one embodiment of the present invention.

[0053] Figure 6IThis is a diagram illustrating an error correction method for AC signals in digital broadcasting according to an embodiment of the present invention.

[0054] Figure 6J This is a diagram illustrating the NUC format of an AC signal for digital broadcasting according to an embodiment of the present invention.

[0055] Figure 7A This is a diagram illustrating a polarization-based transmission method according to an embodiment of the present invention.

[0056] Figure 7B This is a system configuration diagram of a broadcasting system using a polarization-based transmission method according to an embodiment of the present invention.

[0057] Figure 7C This is a system configuration diagram of a broadcasting system using a polarization-based transmission method according to an embodiment of the present invention.

[0058] Figure 7D This is a diagram illustrating frequency conversion processing according to one embodiment of the present invention.

[0059] Figure 7E This is a diagram illustrating the structure of a cut-through transmission method according to an embodiment of the present invention.

[0060] Figure 7F This is a diagram illustrating a through transmission band according to one embodiment of the present invention.

[0061] Figure 7G This is a diagram illustrating the structure of a cut-through transmission method according to an embodiment of the present invention.

[0062] Figure 7H This is a diagram illustrating a through transmission band according to one embodiment of the present invention.

[0063] Figure 7I This is a diagram illustrating a through transmission band according to one embodiment of the present invention.

[0064] Figure 8A This is a diagram illustrating a layer division multiplexing transmission method according to an embodiment of the present invention.

[0065] Figure 8B This is a system configuration diagram of a broadcast system using a layer division multiplexing transmission method according to an embodiment of the present invention.

[0066] Figure 8C This is a diagram illustrating frequency conversion and amplification processing according to one embodiment of the present invention.

[0067] Figure 9A This is a diagram illustrating the protocol stack of MPEG-2 TS.

[0068] Figure 9BThis is a diagram explaining the names and functions of tables used in MPEG-2 TS.

[0069] Figure 9C This is a diagram explaining the names and functions of tables used in MPEG-2 TS.

[0070] Figure 9D This is a diagram explaining the names and functions of descriptors used in MPEG-2 TS.

[0071] Figure 9E This is a diagram explaining the names and functions of descriptors used in MPEG-2 TS.

[0072] Figure 9F This is a diagram explaining the names and functions of descriptors used in MPEG-2 TS.

[0073] Figure 9G This is a diagram explaining the names and functions of descriptors used in MPEG-2 TS.

[0074] Figure 9H This is a diagram explaining the names and functions of descriptors used in MPEG-2 TS.

[0075] Figure 9I This is a diagram explaining the names and functions of descriptors used in MPEG-2 TS.

[0076] Figure 10A This is a diagram illustrating the protocol stack in the MMT broadcast channel.

[0077] Figure 10B This is a diagram illustrating the protocol stack in the MMT communication line.

[0078] Figure 10C This is a diagram explaining the names and functions of tables used in TLV-SI of MMT.

[0079] Figure 10D This is a diagram illustrating the names and functions of descriptors used in TLV-SI of MMT.

[0080] Figure 10E This is a diagram illustrating the names and functions of messages used in MMT-SI of MMT.

[0081] Figure 10F This is a diagram explaining the names and functions of tables used in MMT-SI of MMT.

[0082] Figure 10G This is a diagram explaining the names and functions of descriptors used in MMT-SI of MMT.

[0083] Figure 10HThis is a diagram explaining the names and functions of descriptors used in MMT-SI of MMT.

[0084] Figure 10I This is a diagram illustrating descriptors, names, and functions used in MMT-SI of MMT.

[0085] Figure 10J This is a diagram explaining the relationship between data transmission in the MMT format and each table.

[0086] Figure 11A This is an operational sequence diagram of the channel setting process of the broadcast receiving apparatus 100 according to one embodiment of the present invention.

[0087] Figure 11B This is a diagram illustrating the data structure of the network information table.

[0088] Figure 11C This is a diagram illustrating the data structure of a terrestrial distribution system descriptor.

[0089] Figure 11D This is a diagram illustrating the data structure of a service list descriptor.

[0090] Figure 11E This is a diagram illustrating the data structure of the TS information descriptor.

[0091] Figure 12A FIG. 1 is an appearance diagram of a remote control according to an embodiment of the present invention.

[0092] Figure 12B This is a diagram illustrating a banner display during channel selection according to an embodiment of the present invention. DETAILED DESCRIPTION

[0093] Hereinafter, examples of embodiments of the present invention will be described using the drawings.

[0094] (Example 1)

[0095] [System Structure]

[0096] Figure 1 This is a system configuration diagram showing an example of the configuration of a broadcast system.

[0097] The broadcasting system includes, for example, a broadcast receiving device 100 and an antenna 200, a radio tower 300 of a broadcasting station and a broadcasting station server 400, a service provider server 500, a mobile phone communication server 600 and 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. Furthermore, various server devices and communication equipment can be connected to the Internet 800.

[0098] The broadcast receiving device 100 is a television receiver that has the function of receiving advanced digital broadcast services. The broadcast receiving device 100 may also have the function of receiving existing digital broadcast services. Furthermore, it can cooperate with the function of using broadband networks in digital broadcast services (existing digital broadcast services or advanced digital broadcast services) to support a broadcast communication cooperation system that combines digital broadcast services with additional content obtained via broadband networks, computing processing in server devices, and prompt processing achieved through cooperation with portable terminal devices. The broadcast receiving device 100 receives digital broadcast waves transmitted from the radio tower 300 via the antenna 200. The above-mentioned digital broadcast waves can be transmitted directly from the radio tower 300 to the antenna 200, or they can be transmitted via a broadcast satellite or communication satellite (not shown). It is also possible to receive broadcast signals forwarded by cable TV stations via wired lines. In addition, the broadcast receiving device 100 can be connected to the Internet 800 via the router device 800R and can send and receive data by communicating with various server devices on the Internet 800.

[0099] The router device 800R is connected to the internet 800 via wireless or wired communication, and is also connected to the broadcast receiving device 100 via wired communication and to the portable information terminal 700 via wireless communication. This allows each server device on the internet 800, the broadcast receiving device 100, and the portable information terminal 700 to exchange data with each other via the router device 800R. The router device 800R, the broadcast receiving device 100, and the portable information terminal 700 form a LAN (Local Area Network). Alternatively, the broadcast receiving device 100 and the portable information terminal 700 can communicate directly without going through the router device 800R, using methods such as Bluetooth (registered trademark) or NFC (Near Field Communication).

[0100] The radio tower 300 is the broadcasting equipment of the broadcasting station, which transmits digital broadcast waves including various control information related to digital broadcasting services and content data of broadcast programs (such as dynamic image content and sound content). In addition, the broadcasting station has a broadcasting station server 400. The broadcasting station server 400 stores the content data of the broadcast programs and metadata such as the program title, program ID, program summary, performers, broadcast date and time of each broadcast program. The broadcasting station server 400 provides the above-mentioned content data and metadata to the service operator in accordance with the contract. The provision of content data and metadata to the service operator is carried out through the API (Application Programming Interface) possessed by the broadcasting station server 400.

[0101] The service operator server 500 is a server device prepared by the service operator in order to provide services based on the broadcast communication cooperation system. The service operator server 500 stores, manages and publishes content data and metadata provided by the broadcast station server 400, and content data and applications (action programs and / or various data, etc.) produced for the broadcast communication cooperation system. In addition, it also has the function of retrieving and providing an overview of available applications in response to inquiries from television receivers. In addition, the storage, management and publication of the above-mentioned content data and metadata, as well as the storage, management and publication of the above-mentioned applications, can be performed by different server devices. The broadcast station and the service operator can be the same or different operators. Multiple service operator servers 500 can be prepared for each different service. In addition, the functions of the service operator server 500 can also be combined with the broadcast station server 400.

[0102] Mobile phone communication server 600 is connected to the Internet 800 and, on the other hand, is connected to portable information terminal 700 via base station 600B. Mobile phone communication server 600 manages telephone communications (calls) and data transmission and reception performed by portable information terminal 700 via the mobile phone communication network, enabling data transmission and reception between portable information terminal 700 and various server devices on Internet 800. Furthermore, communication between portable information terminal 700 and broadcast receiving device 100 can also be performed via base station 600B and mobile phone communication server 600, as well as Internet 800 and router device 800R.

[0103] [Hardware Structure of Broadcast Receiving Device]

[0104] Figure 2A This is a block diagram showing an example of the internal structure of the broadcast receiving device 100.

[0105] 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 modem unit 130C, a second modem unit 130T, a third modem unit 130L, a fourth modem unit 130B, a first decoder unit 140S, a second decoder unit 140U, an operation input unit 180, an image selection unit 191, a monitor unit 192, an image output unit 193, a sound selection unit 194, a speaker unit 195, and a sound output unit 196.

[0106] The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving device 100 according to a predetermined operating program. The system bus 102 is a communication path for transmitting and receiving data and commands between the main control unit 101 and each operating module in the broadcast receiving device 100.

[0107] ROM (Read Only Memory) 103 is a non-volatile memory that stores basic operating programs such as an operating system and other operating programs. For example, a rewritable ROM such as EEPROM (Electrically Erasable Programmable ROM) or flash ROM is used. In addition, the operation setting values ​​required for the operation of the broadcast receiving device 100 are stored in ROM 103. RAM (Random Access Memory) 104 is a working area when the basic operating programs and other operating programs are executed. ROM 103 and RAM 104 can also be integrated with the main control unit 101. In addition, ROM 103 may not be as Figure 2A Instead of the independent structure shown, a portion of the storage area within the storage (accumulation) 110 is used.

[0108] The storage (accumulation) unit 110 stores the operation program and operation setting values ​​of the broadcast receiving device 100, personal information of the user of the broadcast receiving device 100, etc. In addition, the operation program downloaded via the Internet 800 and various data generated by the above-mentioned operation program can be stored. In addition, dynamic images, still images, sounds and other contents obtained from broadcast waves or downloaded via the Internet 800 can also be stored. It is also possible to use a part of the area of ​​the storage (accumulation) unit 110 to replace all or part of the functions of the ROM 103. In addition, the storage (accumulation) unit 110 needs to maintain the stored information even when the broadcast receiving device 100 is not powered from the outside. Therefore, for example, a semiconductor device memory such as a flash ROM or SSD (Solid State Drive), a disk drive such as an HDD (Hard Disc Drive) and the like are used.

[0109] Furthermore, the aforementioned operating programs stored in the ROM 103 and the storage (accumulation) unit 110 can be added, updated, or have their functions expanded by downloading them from various server devices on the Internet 800 or via broadcast waves.

[0110] The LAN communication unit 121 is connected to the Internet 800 via the router device 800R, and transmits and receives data with various server devices and other communication devices on the Internet 800. In addition, the content data (or part thereof) of the program transmitted via the communication line is also obtained. The connection with the router device 800R can be a wired connection or a wireless connection such as Wi-Fi (registered trademark). The LAN communication unit 121 has an encoding circuit and a decoding circuit, etc. In addition, the broadcast receiving device 100 can also further have other communication units such as a Bluetooth (registered trademark) communication unit, an NFC communication unit, and an infrared communication unit.

[0111] The first modem 130C, the second modem 130T, the third modem 130L, and the fourth modem 130B each receive broadcast waves from a digital broadcast service and, under the control of the main control unit 101, perform channel selection by tuning to a channel of a specified service. Furthermore, they perform demodulation and waveform shaping of the modulated wave of the received signal, as well as frame and layer structure reconstruction, energy backscattering, and error correction decoding to reproduce the packet stream. Furthermore, they extract and decode the transmission TMCC (Transmission Multiplexing Configuration Control) signal from the received signal.

[0112] The first modem 130C can input digital broadcast waves from a current terrestrial digital broadcast service received by antenna 200C, a current terrestrial digital broadcast receiving antenna. Furthermore, the first modem 130C can input either a horizontally (H) polarized signal or a vertically (V) polarized signal from a dual-polarization terrestrial digital broadcast service, described later, and demodulate the segments of a layer using the same modulation scheme as the current terrestrial digital broadcast service. Furthermore, the first modem 130C can input broadcast signals from layer-division multiplexed terrestrial digital broadcast service, described later, and demodulate the layers using the same modulation scheme as the current terrestrial digital broadcast service. The second modem 130T inputs digital broadcast waves from an advanced terrestrial digital broadcast service received by antenna 200T, a dual-polarization terrestrial digital broadcast receiving antenna, via a converter 201T. The third modem 130L inputs digital broadcast waves from an advanced terrestrial digital broadcast service received by antenna 200L, a layer-division multiplexed terrestrial digital broadcast receiving antenna, via a converter 201L. The fourth modem 130B inputs digital broadcast waves of advanced BS (Broadcasting Satellite) digital broadcast services and advanced CS (Communication Satellite) digital broadcast services received by the antenna 200B, which is a BS / CS common receiving antenna, via the converter 201B.

[0113] Here, the expression "modulation and demodulation unit" refers to a component having a tuner function and a demodulation function.

[0114] The antenna 200C, antenna 200T, antenna 200L, antenna 200B, converter 201T, converter 201L, and converter 201B do not constitute a part of the broadcast receiving apparatus 100 but belong to equipment such as a building where the broadcast receiving apparatus 100 is installed.

[0115] The above-mentioned current terrestrial digital broadcasting is a broadcast signal of a terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally×1080 pixels vertically.

[0116] Details of polarization-based terrestrial digital broadcasting (advanced terrestrial digital broadcasting using polarization-based transmission) will be described later. It is a terrestrial digital broadcasting service capable of transmitting video with a maximum resolution exceeding 1920 pixels horizontally x 1080 pixels vertically. Polarization-based terrestrial digital broadcasting uses multiple polarizations: horizontal (H) polarization and vertical (V) polarization. Polarization-based terrestrial digital broadcasting uses segments obtained by dividing each of the multiple polarizations to transmit video with a maximum resolution exceeding 1920 pixels horizontally x 1080 pixels vertically.

[0117] Furthermore, when the term "multiple polarizations" is used in connection with dual-polarization terrestrial digital broadcasting, unless otherwise specified, it refers to both horizontal (H) and vertical (V) polarizations. Furthermore, when the term "polarization" alone is used, it also refers to a "polarization signal." Furthermore, a segmented portion of one or both of the multiple polarizations can be used to transmit images using the same modulation scheme as the existing terrestrial digital broadcasting services that transmit images with a maximum resolution of 1920 horizontal pixels x 1080 vertical pixels. In other words, dual-polarization terrestrial digital broadcasting services can simultaneously transmit images with a maximum resolution of 1920 horizontal pixels x 1080 vertical pixels, as described in the various embodiments of the present invention, using different segments of the multiple polarizations. Furthermore, a terrestrial digital broadcasting service capable of transmitting images with a maximum resolution exceeding 1920 horizontal pixels x 1080 vertical pixels can be used.

[0118] In addition, details of layered multiplexed terrestrial digital broadcasting (advanced terrestrial digital broadcasting using a layered multiplexed transmission method) will be described later. It is a broadcast signal of a terrestrial digital broadcasting service capable of transmitting images with a maximum resolution of more than 1920 pixels horizontally x 1080 pixels vertically. Layered multiplexed terrestrial digital broadcasting multiplexes multiple digital broadcast signals with different signal levels. The layered multiplexed terrestrial digital broadcasting of each embodiment of the present invention, as the multiple digital broadcast signals with different signal levels, can transmit the broadcast signal of the current terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally x 1080 pixels vertically and the broadcast signal of the terrestrial digital broadcasting service that can transmit images with a maximum resolution of more than 1920 pixels horizontally x 1080 pixels vertically in a layered multiplexed manner in the frequency band of the same physical channel. That is, in the layer-division multiplexed terrestrial digital broadcasting of each embodiment of the present invention, it is possible to simultaneously transmit the current terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically and the terrestrial digital broadcasting service that can transmit images with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels vertically using multiple layers with different signal levels.

[0119] Furthermore, the broadcast receiving device in each embodiment of the present invention need only be configured to effectively receive advanced digital broadcasts and need not necessarily include all of the first modem 130C, the second modem 130T, the third modem 130L, and the fourth modem 130B. For example, it may only require at least one of the second modem 130T or the third modem 130L. Furthermore, to achieve even more advanced functionality, the device may include one or more of the four modems in addition to either the second modem 130T or the third modem 130L.

[0120] Furthermore, the antenna 200C, the antenna 200T, and the antenna 200L may be used in combination as appropriate. Furthermore, a plurality of modems may be used in combination (or integrated) as appropriate among the first modem 130C, the second modem 130T, and the third modem 130L.

[0121] The first decoder unit 140S and the second decoder unit 140U input packet streams output from the first modem unit 130C, the second modem unit 130T, the third modem unit 130L, and the fourth modem unit 130B, respectively, or packet streams obtained from various server devices on the Internet 800 via the LAN communication unit 121. The packet streams input to the first decoder unit 140S and the second decoder unit 140U may be packet streams in a format such as MPEG (Moving Picture Experts Group)-2 TS (Transport Stream) or MPEG-2 PS (Program Stream), TLV (Type Length Value), or MMT (MPEG Media Transport).

[0122] The first decoder unit 140S and the second decoder unit 140U, respectively, perform conditional access (CA) processing, demultiplexing (extracting video data, audio data, and various information data from the packet stream based on various control information included in the packet stream), decoding the video and audio data, acquiring program information and generating an EPG (Electronic Program Guide), and reproducing data broadcast images and multimedia data. Furthermore, they perform processing to overlay the generated EPG or reproduced multimedia data with the decoded video and audio data.

[0123] The video selection unit 191 receives video data output from the first decoder unit 140S and the second decoder unit 140U, and performs processing such as selection and / or superimposition as appropriate based on control by the main control unit 101. The video selection unit 191 also performs scaling and OSD (On Screen Display) data superimposition as appropriate. The monitor unit 192, such as a display device such as a liquid crystal panel, displays the video data selected and / or superimposed by the video selection unit 191 and provides it to the user of the broadcast receiving device 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 world.

[0124] The audio selection unit 194 receives input of the audio data output from the first decoder unit 140S and the audio data output from the second decoder unit 140U, and appropriately performs processing such as selection and / or mixing based on the control of the main control unit 101. The speaker unit 195 outputs the audio data selected and / or mixed by the audio selection unit 194 and provides it to the user of the broadcast receiving device 100. The audio output unit 196 is an audio output interface for externally outputting the audio data selected and / or mixed by the audio selection unit 194.

[0125] The digital interface 125 is an interface for outputting or inputting packet streams containing encoded digital video data and / or digital audio data. The digital interface 125 can directly output packet streams input from the first modem 130C, the second modem 130T, the third modem 130L, and the fourth modem 130B to the first decoder 140S or second decoder 140U. Alternatively, the digital interface 125 can be controlled so that packet streams externally input via the digital interface 125 are input to the first decoder 140S or second decoder 140U or stored in the storage (accumulation) unit 110. Alternatively, the digital interface 125 can output the video data and audio data separated and extracted by the first decoder 140S or second decoder 140U. Alternatively, the digital interface 125 can be controlled so that video data and audio data externally input via the digital interface 125 are input to the first decoder 140S or second decoder 140U or stored in the storage (accumulation) unit 110.

[0126] The expansion interface unit 124 is an interface group used to expand the functions of the broadcast receiving device 100. It is composed of an analog video / audio interface, a USB (Universal Serial Bus) interface, a memory interface, and the like. The analog video / audio interface inputs analog video / audio signals from an external video / audio output device and outputs analog video / audio signals to an external video / audio input device. The USB interface connects to a PC, etc., and transmits and receives data. It can also connect to an HDD to record broadcast programs or other content data. It can also connect to a keyboard or other USB devices. The memory interface connects to a memory card or other storage media and transmits and receives data.

[0127] The operation input unit 180 is an instruction input unit for inputting operation instructions to the broadcast receiving device 100. It is composed of a remote control receiving unit that receives commands sent from a remote controller (not shown) and an operation keypad composed of an array of push button switches. Alternatively, only one of these two components may be used. Furthermore, the operation input unit 180 can be replaced by a touch panel, etc., arranged overlapping with the monitor unit 192. Alternatively, it can be replaced by a keyboard, etc., connected to the expansion interface unit 124. The remote control can be replaced by a portable information terminal 700 equipped with a remote control command transmission function.

[0128] If the broadcast receiving device 100 is a television receiver, the video output unit 193 and the audio output unit 196 are not essential components. Alternatively, the broadcast receiving device 100 may be an optical disc drive recorder such as a DVD (Digital Versatile Disc) recorder, a disk drive recorder such as an HDD recorder, or a set-top box (STB). Alternatively, it may be a personal computer (Personal Computer) or tablet terminal capable of receiving digital broadcast services. If the broadcast receiving device 100 is a DVD recorder, HDD recorder, or STB, the monitor unit 192 and the speaker unit 195 are not essential components. By connecting an external monitor and external speakers to the video output unit 193 and the audio output unit 196 or the digital interface unit 125, the device can operate in the same manner as a television receiver.

[0129] Figure 2B This is a block diagram showing an example of a detailed configuration of the first modem unit 130C.

[0130] The channel selection / detection unit 131C receives the current digital broadcast wave received by antenna 200C and selects a channel based on the channel selection control signal. The TMCC decoder 132C extracts the TMCC signal from the output signal of the channel selection / detection unit 131C and obtains various TMCC information. This obtained TMCC information is used to control various backend processes. Details of the TMCC signal and TMCC information are described later.

[0131] Based on the TMCC information, etc., the demodulator 133C receives a modulated signal using a modulation scheme such as QPSK (Quadrature Phase Shift Keying), DQPSK (Differential QPSK), 16QAM (Quadrature Amplitude Modulation), or 64QAM, and performs demodulation processing including frequency deinterleaving, time deinterleaving, and carrier demapping. The demodulator 133C can also support modulation schemes other than those described above.

[0132] The stream reproduction unit 134C performs layering processing, internal coding error correction processing such as Viterbi decoding, energy back-diffusion processing, stream reproduction processing, and external coding error correction processing such as RS (Reed Solomon) decoding. Furthermore, error correction processing methods other than those described above may be used. The packet stream reproduced and output by the stream reproduction unit 134C is, for example, an MPEG-2 TS, or may be a packet stream in another format.

[0133] Figure 2C This is a block diagram showing an example of a detailed configuration of the second modem unit 130T.

[0134] The channel selection / detection unit 131H receives the horizontal (H) polarization signal of the digital broadcast wave received by the antenna 200T and selects a channel based on the channel selection control signal. The channel selection / detection unit 131V receives the vertical (V) polarization signal of the digital broadcast wave received by the antenna 200T and selects a channel based on the channel selection control signal. Furthermore, the channel selection processing in the channel selection / detection unit 131H and the channel selection processing in the channel selection / detection unit 131V can be controlled in a coordinated manner or independently. That is, the channel selection / detection unit 131H and the channel selection / detection unit 131V can be considered as one channel selection / detection unit and controlled to select one channel of a digital broadcast service that uses both horizontal and vertical polarizations. Alternatively, the channel selection / detection unit 131H and the channel selection / detection unit 131V can be considered as two independent channel selection / detection units and controlled to select two different channels of a digital broadcast service that uses only horizontal polarization (or vertical polarization).

[0135] In addition, the horizontal (H) polarized wave signal and the vertical (V) polarized wave signal received by the second modulation and demodulation unit 130T of the broadcast receiving device in each embodiment of the present invention can be polarized wave signals based on broadcast waves whose polarization directions differ by approximately 90 degrees. The horizontal (H) polarized wave signal and the vertical (V) polarized wave signal described below and the structure regarding their reception can also be opposite.

[0136] The TMCC decoder 132H extracts the TMCC signal from the output signal of the channel selection / detection unit 131H and obtains various TMCC information. The TMCC decoder 132V extracts the TMCC signal from the output signal of the channel selection / detection unit 131V and obtains various TMCC information. Alternatively, only one of the TMCC decoders 132H and 132V may be present. The obtained TMCC information is used to control various backend processes.

[0137] Demodulation units 133H and 133V each input a modulated wave modulated using BPSK (Binary Phase Shift Keying), DBPSK (Differential BPSK), QPSK, DQPSK, 8PSK (Phase Shift Keying), 16APSK (Amplitude and Phase Shift Keying), 32APSK, 16QAM, 64QAM, 256QAM, or 1024QAM, based on TMCC information and other information, and perform demodulation processing including frequency deinterleaving, time deinterleaving, and carrier demapping. Demodulation units 133H and 133V can also support modulation methods different from the above-mentioned modulation methods.

[0138] The stream reproduction unit 134H and the stream reproduction unit 134V respectively perform layering processing, inner coding error correction processing such as Viterbi decoding or LDPC (Low Density Parity Check) decoding, energy back-diffusion processing, stream reproduction processing, and outer coding error correction processing such as RS decoding or BCH decoding. Furthermore, error correction methods different from those described above may be used. The packet stream reproduced and output by the stream reproduction unit 134H is, for example, an MPEG-2 TS. The packet stream reproduced and output by the stream reproduction unit 134V is, for example, an MPEG-2 TS or TLV including an MMT packet stream. Alternatively, packet streams of other formats may be used.

[0139] Figure 2D This is a block diagram showing an example of a detailed configuration of the third modem unit 130L.

[0140] The channel selection / detection unit 131L receives a digital broadcast wave that has undergone layered division multiplexing (LDM) processing from antenna 200L and selects a channel based on a channel selection control signal. The modulated wave on the upper layer (UL) and the modulated wave on the lower layer (LL) of the layered division multiplexing digital broadcast wave can be used to transmit different digital broadcast services (or different channels of the same broadcast service). The modulated wave on the upper layer is output to the demodulation unit 133S, while the modulated wave on the lower layer is output to the demodulation unit 133L.

[0141] The TMCC decoder 132L receives the upper and lower modulated waves output from the channel selector / detector 131L, extracts the TMCC signal, and acquires various TMCC information.

[0142] The demodulation units 133S and 133L perform the same operations as the demodulation units 133H and 133V, and therefore detailed descriptions thereof are omitted. The stream reproduction units 134S and 134L perform the same operations as the stream reproduction units 134H and 134V, respectively, and therefore detailed descriptions thereof are omitted.

[0143] Figure 2E This is a block diagram showing an example of a detailed configuration of the fourth modem unit 130B.

[0144] The channel selection / detection unit 131B receives digital broadcast waves from advanced BS digital broadcasting services and advanced CS digital broadcasting services received by antenna 200B and selects a channel based on a channel selection control signal. Other operations are identical to those of the channel selection / detection units 131H and 131V, so detailed descriptions are omitted. Furthermore, the TMCC decoder 132B, demodulator 133B, and stream reproduction unit 134B perform the same operations as those of the TMCC decoders 132H and 132V, demodulators 133H and 133V, and stream reproduction unit 134V, respectively, so detailed descriptions are omitted.

[0145] Figure 2F This is a block diagram showing an example of a detailed configuration of the first decoder unit 140S.

[0146] Based on control from the main control unit 101, the selector 141S selects and outputs one of the packet streams input from the first modem 130C, the second modem 130T, and the third modem 130L. The packet streams input from the first modem 130C, the second modem 130T, and the third modem 130L are, for example, MPEG-2 TS. The CA descrambler 142S decrypts the encryption algorithm of the specified scrambling scheme based on various conditional access control information superimposed on the packet streams.

[0147] The demultiplexer 143S is a stream decoder that separates and extracts video data, audio data, superimposed text data, subtitle data, and program information data based on various control information included 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 superimposed text data, subtitle data, and program information data are distributed to the data decoder 144S. The demultiplexer 143S can also input a packet stream (e.g., MPEG-2 PS) obtained from a server device on the Internet 800 via the LAN communication unit 121. Furthermore, the demultiplexer 143S can output packet streams input from the first modem 130C, the second modem 130T, and the third modem 130L to the external device via the digital interface 125, and can also input packet streams obtained from the external device via the digital interface 125.

[0148] The video decoder 145S decodes compressed video data input from the demultiplexer 143S and performs colorimetry and dynamic range conversion on the decoded video data. It also performs resolution conversion (up / down conversion) under the control of the main control unit 101, outputting video data at resolutions such as UHD (3840 pixels horizontally × 2160 pixels vertically), HD (1920 pixels horizontally × 1080 pixels vertically), or SD (720 pixels horizontally × 480 pixels vertically). It can also output video data at other resolutions. The audio decoder 146S decodes compressed audio data. It also performs downmixing under the control of the main control unit 101, outputting audio data at a channel count of 22.2, 7.1, 5.1, or 2 channels. Multiple video decoders 145S and audio decoders 146S may be included to simultaneously decode multiple video and audio data sets.

[0149] The data decoder 144S performs processes such as generating an EPG based on program information data, generating data broadcast screens based on BML data, and controlling collaborative applications based on the broadcast communication collaboration function. The data decoder 144S includes a BML browser function for executing BML documents, and the data broadcast screen generation process is performed by this BML browser function. Furthermore, the data decoder 144S decodes superimposed text data to generate superimposed text information, and decodes subtitle data to generate subtitle information.

[0150] The superimposing units 147S, 148S, and 149S respectively superimpose the video data output from the video decoder 145S with the EPG or data broadcast screen output from the data decoder 144S. The synthesizing unit 151S synthesizes the audio data output from the audio decoder 146S with the audio data reproduced by the data decoder 144S. The selecting unit 150S selects the resolution of the video data under the control of the main control unit 101. The functions of the superimposing units 147S, 148S, 149S, and selecting unit 150S may be combined with the video selecting unit 191. The functions of the synthesizing unit 151S may also be combined with the audio selecting unit 194.

[0151] Figure 2G This is a block diagram showing an example of a detailed structure of the second decoder unit 140U.

[0152] Based on control by the main control unit 101, the selector 141U selects and outputs one of the packet streams input from the second modem 130T, the packet streams input from the third modem 130L, and the packet streams input from the fourth modem 130B. The packet streams input from the second modem 130T, the third modem 130L, and the fourth modem 130B may be, for example, MMT packet streams or TLVs containing MMT packet streams. Alternatively, they may be packet streams in the MPEG-2 TS format that employs an image compression method such as HEVC (High Efficiency Video Coding). The CA descrambler 142U decrypts the encryption algorithm of the specified scrambling method based on various control information regarding conditional access superimposed on the packet streams.

[0153] The demultiplexer 143U is a stream decoder that separates and extracts video data, audio data, superimposed text data, subtitle data, and program information data 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 superimposed text data, subtitle data, and program information data are distributed to the multimedia decoder 144U. The demultiplexer 143U can also input packet streams (e.g., MPEG-2 PS or MMT packet streams) received from a server device on the Internet 800 via the LAN communication unit 121. Furthermore, the demultiplexer 143U can output packet streams input from the second modem 130T, the third modem 130L, and the fourth modem 130B to the external device via the digital interface 125, and can also input packet streams received from the external device via the digital interface 125.

[0154] The multimedia decoder 144U generates an EPG based on program information data, creates multimedia screens based on multimedia data, and controls collaborative applications based on the broadcast communication collaboration function. The multimedia decoder 144U includes an HTML browser function for executing HTML documents, and the multimedia screen generation process is performed by this HTML browser function.

[0155] 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 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, respectively. Figure 2F In the description of the video decoder 145S, the audio decoder 146S, the superposition unit 147S, the superposition unit 148S, the superposition unit 149S, the synthesis unit 151S, and the selection unit 150S, replace the S at the end of the symbol with U to become Figure 2G The descriptions of the image 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 given separately, so further detailed descriptions are omitted.

[0156] [Software Structure of Broadcast Receiving Device]

[0157] Figure 2HThis is a software structure diagram of the broadcast receiving device 100, showing an example of the software structure in the storage (accumulation) unit 110 (or ROM 103, hereinafter the same) and 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. The storage (accumulation) unit 110 also includes a content storage area 1011 for storing content data such as moving images, still images, and audio; an authentication information storage area 1012 for storing authentication information used for communication and collaboration with external portable terminal devices and server devices; and a various information storage area 1019 for storing various other information.

[0158] The basic operation program 1001 stored in the storage (accumulation) unit 110 is deployed to the RAM 104, and the main control unit 101 executes the deployed basic operation program, thereby forming the basic operation control unit 1101. Furthermore, the reception function program 1002, browser program 1003, and content management program 1004 stored in the storage (accumulation) unit 110 are each deployed to the RAM 104, and the main control unit 101 executes each of these deployed operation programs, thereby forming the reception function control unit 1102, browser engine 1103, and content management unit 1104. Furthermore, the RAM 104 includes a temporary storage area 1200 for temporarily storing data generated during the execution of each operation program as needed.

[0159] In the following, for simplicity of description, the process in which the main control unit 101 controls each operation module by downloading the basic operation program 1001 stored in the storage (accumulation) unit 110 to the RAM 104 and executing the program will be described as the basic operation control unit 1101 controlling each operation module. The same description applies to the other operation programs.

[0160] The reception function control unit 1102 performs basic control of the broadcast reception function and broadcast communication cooperative function of the broadcast receiving device 100. In particular, the channel selection / demodulation unit 1102a primarily controls channel selection, TMCC information acquisition, and demodulation processing in the first modem unit 130C, the second modem unit 130T, the third modem unit 130L, and the fourth modem unit 130B. The stream reproduction control unit 1102b primarily controls layering, error correction decoding, energy reverse diffusion, and stream reproduction in the first modem unit 130C, the second modem unit 130T, the third modem unit 130L, and the fourth modem unit 130B. The AV decoding unit 1102c primarily controls demultiplexing (stream decoding), video data decoding, and audio data decoding in the first decoder unit 140S and the second decoder unit 140H. The multimedia (MM) data reproduction unit 1102d primarily controls the BML data reproduction process, superimposed text data decoding process, subtitle data decoding process, and communication cooperation application control process in the first decoder unit 140S, as well as the HTML data reproduction process, multimedia screen generation process, and communication cooperation application control process in the second decoder unit 140H. The EPG generation unit 1102e primarily controls the EPG generation process and the display process of the generated EPG in the first and second decoders 140S, 140H. The presentation processing unit 1102f controls the chroma conversion process, dynamic range conversion process, resolution conversion process, and audio downmixing process in the first and second decoders 140S, 140H, as well as controls the video selection unit 191 and audio selection unit 194.

[0161] The BML browser 1103a and HTML browser 1103b of the browser engine 1103 interpret BML documents and HTML documents during the BML data reproduction process and HTML data reproduction process, and perform data broadcast screen generation process and multimedia screen generation process.

[0162] The content management unit 1104 performs: time schedule management and execution control when making recording reservations and audio-visual reservations for broadcast programs, copyright management when outputting broadcast programs and recorded programs from the digital I / F 125 or the LAN communication unit 121, and validity period management of collaborative applications obtained based on the broadcast communication collaboration function.

[0163] The aforementioned operating programs may be pre-stored in the storage (accumulation) unit 110 and / or ROM 103 before the product is shipped. Alternatively, they may be obtained from a server on the Internet 800 via the LAN communication unit 121 after the product is shipped. Furthermore, the aforementioned operating programs stored on a memory card or optical disk may be obtained via the expansion interface unit 124. Alternatively, they may be newly obtained or updated via broadcast waves.

[0164] [Structure of the broadcast station server]

[0165] Figure 3A This is an example of the internal structure of the broadcast station server 400. The broadcast station server 400 includes 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.

[0166] The main control unit 401 is a microprocessor unit that controls the entire broadcast station server 400 according to a predetermined operating program. The system bus 402 is a communication path for transmitting and receiving various data and commands between the main control unit 401 and the various operating modules within the broadcast station server 400. The RAM 404 is a work area during the execution of the various operating programs.

[0167] The storage unit 410 stores a basic operation program 4001, a content management / distribution program 4002, and a content delivery program 4003. It also includes a content data storage area 4011 and a metadata storage area 4012. The content data storage area 4011 stores content data for each broadcast program broadcast by a broadcast station. The metadata storage area 4012 stores metadata such as the program title, program ID, program summary, cast, and broadcast date and time for each of these broadcast programs.

[0168] In addition, the basic action program 4001, content management / publishing program 4002, and content sending program 4003 stored in the storage unit 410 are respectively deployed to RAM 404, and then the main control unit 401 executes the above-deployed basic action program, content management / publishing program, and content sending program, thereby forming the basic action control unit 4101, content management / publishing control unit 4102, and content sending control unit 4103.

[0169] For simplicity of description, the following description will describe the process in which the main control unit 401 controls each operation module by downloading the basic operation program 4001 stored in the storage unit 410 to the RAM 404 and executing the program, as the basic operation control unit 4101 controls each operation module. The same description applies to the other operation programs.

[0170] The content management / distribution control unit 4102 manages the content data and metadata stored in the content data storage area 4011 and the metadata storage area 4012, and controls the provision of such content data and metadata to the service provider in accordance with the contract. Furthermore, when providing content data and metadata to the service provider, the content management / distribution control unit 4102 also performs authentication processing with the service provider server 500, as necessary.

[0171] The content sending control unit 4103 performs time planning management when sending the stream including the content data of the broadcast program stored in the content data storage area 4011 and the program title, program ID, copy control information of the program content of the broadcast program stored in the metadata storage area 4012 through the digital broadcast signal sending unit 460.

[0172] The LAN communication unit 421 is connected to the Internet 800 and communicates with the service provider server 500 and other communication devices on the Internet 800. 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 consisting of content data and program information data for each broadcast program stored in the content data storage area 4011, and transmits the stream as a digital broadcast wave via the radio tower 300.

[0173] [Structure of service operator's server]

[0174] Figure 3B This is an example of the internal structure of the service provider server 500. The service provider server 500 includes a main control unit 501, a system bus 502, a RAM 504, a storage unit 510, and a LAN communication unit 521.

[0175] The main control unit 501 is a microprocessor unit that controls the entire service provider server 500 according to a predetermined operating program. The system bus 502 is a communication path for transmitting and receiving various data and commands between the main control unit 501 and the various operating modules within the service provider server 500. The RAM 504 is a work area used by the various operating programs during their execution.

[0176] The storage unit 510 stores a basic operating program 5001, a content management / distribution program 5002, and an application management / distribution program 5003. It also 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 and metadata provided by the broadcast station server 400, or content created by a service operator and metadata related to such content. The application storage area 5013 stores applications (operating programs and / or various data, etc.) necessary for implementing various services of the broadcast-communication cooperative system, which are distributed in response to requests from various television receivers.

[0177] In addition, the basic action program 5001, content management / publishing program 5002, and application management / publishing program 5003 stored in the storage unit 510 are respectively deployed to RAM 504, and then the main control unit 501 executes the above-deployed basic action program, content management / publishing program, and application management / publishing program, thereby forming the basic action control unit 5101, content management / publishing control unit 5102, and application management / publishing control unit 5103.

[0178] For simplicity of description, the following description will describe the process in which the main control unit 501 controls each operation module by downloading the basic operation program 5001 stored in the storage unit 510 to the RAM 504 and executing the program, as described as the basic operation control unit 5100 controlling each operation module. The same description applies to the other operation programs.

[0179] The content management / distribution control unit 5102 acquires content data and metadata from the broadcast station server 400, manages the content data and metadata stored in the content data storage area 5011 and metadata storage area 5012, and controls the distribution of this content data and metadata to each television receiver. Furthermore, the application management / distribution control unit 5103 manages the applications stored in the application storage area 5013 and controls the distribution of these applications in response to requests from each television receiver. Furthermore, when distributing applications to each television receiver, the application management / distribution control unit 5103 also performs television receiver authentication processing, etc., as necessary.

[0180] 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, and the like.

[0181] [Digital broadcast waves]

[0182] Here, an example of a digital broadcast wave received by the broadcast receiving apparatus according to the embodiment of the present invention will be described.

[0183] The broadcast receiving device 100 is capable of receiving terrestrial digital broadcast services that share at least some specifications with the ISDB-T (Integrated Services Digital Broadcasting for Terrestrial Television Broadcasting) format. Specifically, the polarization-coupled terrestrial digital broadcasting that the second modem 130T can receive is advanced terrestrial digital broadcasting that shares some specifications with the ISDB-T format. Furthermore, the layer-division multiplexed terrestrial digital broadcasting that the third modem 130L can receive is advanced terrestrial digital broadcasting that shares some specifications with the ISDB-T format. Furthermore, the current terrestrial digital broadcasting that the first modem 130C can receive is ISDB-T-based terrestrial digital broadcasting. Furthermore, the advanced BS digital broadcasting and advanced CS digital broadcasting that the fourth modem 130B can receive are digital broadcasts that differ from the ISDB-T format.

[0184] Here, the polarization-based dual-use terrestrial digital broadcasting and layer-division multiplexing terrestrial digital broadcasting of this embodiment, like ISDB-T, uses OFDM (Orthogonal Frequency Division Multiplexing), a multi-carrier method, as its transmission method. Because OFDM is a multi-carrier method, its symbol length is long. Adding a redundant portion in the time axis, called a guard interval, is effective, mitigating the effects of multipath within the guard interval. This enables the implementation of a single-frequency network (SFN), enabling efficient frequency utilization.

[0185] The polarization-based terrestrial digital broadcasting and layer-division multiplexing terrestrial digital broadcasting of this embodiment divides the OFDM carrier into groups called segments, similar to the ISDB-T method. Figure 4A As shown, one channel bandwidth of the digital broadcasting service is composed of 13 segments. The central part of the frequency band is taken as the position of segment 0, and segment numbers (0 to 12) are assigned to it in sequence. The channel coding of the polarization wave dual-use terrestrial digital broadcasting and layer division multiplexing terrestrial digital broadcasting of this embodiment is performed in units of OFDM segments. Therefore, layered transmission can be defined. For example, in the bandwidth of one TV channel, a part of the OFDM segments can be allocated to fixed reception services and the rest can be allocated to mobile reception services. In layered transmission, each layer is composed of one or more OFDM segments, and parameters such as the carrier modulation method, the coding rate of the inner coding, and the time interleaving length can be set for each layer. In addition, the number of layers can be set arbitrarily, for example, it can be set to a maximum of 3 layers. In Figure 4B An example of OFDM segment hierarchical structure when the number of layers is set to 3 or 2 is shown in FIG. Figure 4BIn the example of (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). Figure 4B In the example of (2), the number of layers is 3, layer A consists of 1 segment (segment 0), layer B consists of 5 segments (segments 1 to 5), and layer C consists of 7 segments (segments 6 to 12). Figure 4B In the example (3), the number of layers is 2, layer A consists of one segment (segment 0), and layer B consists of 12 segments (segments 1 to 12). The number of OFDM segments and channel coding parameters for each layer are determined according to grouping information and transmitted using the TMCC signal, which is control information used to assist the operation of the receiver.

[0186] In addition, as Figure 4B An example of the use of the segment layering of (1), (2), and (3) is as follows.

[0187] For example, Figure 4B The layering of (1) can be used in the polarization wave dual-use terrestrial digital broadcasting of this embodiment, and the same segment layering can be used for horizontal polarization waves and vertical polarization waves. Specifically, as the A layer, the above-mentioned 1 segment of the horizontal polarization wave can be used to transmit the current mobile reception service of the terrestrial digital broadcasting. (In addition, the current mobile reception service of the terrestrial digital broadcasting can also use the above-mentioned 1 segment of the vertical polarization wave to transmit the same service. In this case, it is also regarded as the A layer.) In addition, as the B layer, the above-mentioned 7 segments of the horizontal polarization wave can be used to transmit the current terrestrial digital broadcasting, that is, the terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically. (Also, the terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 horizontal pixels x 1080 vertical pixels can also transmit the same service using the aforementioned seven segments of vertically polarized waves. In this case, this is also considered to be Layer B.) Furthermore, Layer C can be configured to transmit an advanced terrestrial digital broadcasting service capable of transmitting images with a maximum resolution exceeding 1920 horizontal pixels x 1080 vertical pixels using the aforementioned five segments of both horizontally polarized waves and vertically polarized waves, for a total of 10 segments. Details of this transmission will be described later. This segment-layered transmission wave can be received, for example, by the second modem unit 130T of the broadcast receiving device 100.

[0188] For example, Figure 4B The layering of (2) can be used as a reference in the polarization wave dual-use terrestrial digital broadcasting of this embodiment. Figure 4B(1) Different examples are used, and the same segment layering can be used for horizontally polarized waves and vertically polarized waves. Specifically, as the A layer, the above-mentioned 1 segment of the horizontally polarized wave can be used to transmit the current mobile reception service of the terrestrial digital broadcast. (In addition, the current mobile reception service of the terrestrial digital broadcast can also use the above-mentioned 1 segment of the vertically polarized wave to transmit the same service. In this case, it is also regarded as the A layer.) Furthermore, as the B layer, it can be constructed to use the above-mentioned 5 segments of both horizontally polarized waves and vertically polarized waves, a total of 10 segments to transmit an advanced terrestrial digital broadcast service that can transmit images with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels vertically. In addition, as the C layer, the above-mentioned 7 segments of the horizontally polarized wave can be used to transmit the current terrestrial digital broadcast, that is, the terrestrial digital broadcast service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically. (Also, the terrestrial digital broadcast service that transmits images with a maximum resolution of 1920 pixels horizontally x 1080 pixels vertically can also transmit the same service using the aforementioned seven segments of vertically polarized waves. In this case, this is also referred to as the C layer.) Details of this transmission will be described later. This segment-layered transmission wave can be received, for example, by the second modem unit 130T of the broadcast receiving device 100 of this embodiment.

[0189] For example, Figure 4B The layer (3) can be used in the layered multiplexing terrestrial digital broadcasting of this embodiment and the current terrestrial digital broadcasting. Specifically, when used in the layered multiplexing terrestrial digital broadcasting, as layer A, the mobile reception service of the current terrestrial digital broadcasting can be transmitted using one segment in the figure. Furthermore, as layer B, it can be configured to transmit an advanced terrestrial digital broadcasting service that can transmit images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically using 12 segments in the figure. The transmission wave of this layer can be received, for example, by the third modem unit 130L of the broadcast receiving device 100 of this embodiment. When used in the current terrestrial digital broadcasting, as layer A, the mobile reception service of the current terrestrial digital broadcasting can be transmitted using one segment in the figure, and as layer B, the current terrestrial digital broadcasting, that is, the terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, can be transmitted using 12 segments in the figure. The transmission wave of this layer can be received, for example, by the first modem unit 130C of the broadcast receiving device 100 of this embodiment.

[0190] exist Figure 4CThe figure shows an example of a broadcast station system for generating and processing digital broadcast waves, or OFDM transmission waves, for polarization-based dual-use terrestrial digital broadcasting and layer-division multiplexing terrestrial digital broadcasting according to this embodiment. The source coder 411 encodes images, audio, and various other data. The multiplexer / conditional access processor 415 multiplexes the images, audio, and various other data encoded by the source coder 411, performs appropriate processing corresponding to conditional access, and outputs the multiplexed data as a packet stream. Multiple source coders 411 and multiplexers / conditional access processors 415 can exist in parallel to generate multiple packet streams. The channel coder 416 multiplexes these multiple packet streams into a single packet stream, performs channel coding, and outputs the multiplexed data as an OFDM transmission wave. Figure 4C While the details of the source coding and channel coding methods differ in the illustrated configuration, the structure for implementing OFDM transmission wave generation is common to the ISDB-T system. Therefore, the multiple source coding units 411 and multiplexing / conditional access processing units 415 can be configured for ISDB-T terrestrial digital broadcasting services, while others can be configured for advanced terrestrial digital broadcasting services. The signal coding unit 416 multiplexes packet streams from multiple different terrestrial digital broadcasting services. When the multiplexing / conditional access processing unit 415 is configured for ISDB-T terrestrial digital broadcasting services, it can generate an MPEG-2 TS (Transport Stream Packet) stream defined in the MPEG-2 system. Alternatively, when the multiplexing / conditional access processing unit 415 is configured for advanced terrestrial digital broadcasting services, it can generate an MMT packet stream, a TLV stream containing MMT packets, or a stream using TSPs defined in other systems. Of course, the plurality of information source coding units 411 and the multiplexing unit / conditional access processing unit 415 may all be configured for advanced terrestrial digital broadcasting services, and all packet streams multiplexed by the channel coding unit 416 may be configured for advanced terrestrial digital broadcasting services.

[0191] exist Figure 4D An example of the configuration of the channel coding unit 416 is shown in FIG.

[0192] First, for Figure 4D (1) is explained. Figure 4D (1) is a configuration of the channel coding unit 416 when only the OFDM transmission wave of the digital broadcast of the current terrestrial digital broadcast service is generated. The OFDM transmission wave transmitted by this configuration has, for example, Figure 4BThe segment structure of (3). The packet stream input from the multiplexing unit / conditional access processing unit 415 and subjected to re-multiplexing processing is added with error correction redundancy, and various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving are performed. After that, it is processed based on IFFT (Inverse Fast Fourier Transform) together with the pilot signal, TMCC signal, and AC signal, and after being added with a guard interval, it is orthogonally modulated to become an OFDM transmission wave. In addition, the outer coding process, power diffusion process, byte interleaving, inner coding process, and mapping process are configured to be able to process each layer such as the A layer and the B layer separately. (In addition, the digital broadcasting of the current terrestrial digital broadcasting service is 2 layers in application, but can transmit up to 3 layers, so Figure 4D An example of 3 layers is shown in (1). ) The mapping process is a modulation process of the carrier. In addition, for the packet stream input from the multiplexing unit / conditional access processing unit 415, TMCC information or mode or protection interval ratio and other information can also be multiplexed. In addition, the packet stream input to the channel coding unit 416 can be a TSP stream specified in the MPEG-2 system as described above. Figure 4D The OFDM transmission wave generated by the configuration of (1) can be received by, for example, the first modem unit 130C of the broadcast receiving apparatus 100 of this embodiment.

[0193] Next, for Figure 4D (2) is explained. Figure 4D (2) is the configuration of the channel coding unit 416 when generating OFDM transmission waves for polarization-based terrestrial digital broadcasting according to this embodiment. The OFDM transmission waves transmitted using this configuration have, for example, Figure 4B The segment structure of (1) or (2). Figure 4D In (2), the packet stream input from the multiplexing unit / conditional access processing unit 415 and subjected to re-multiplexing processing is also added with error correction redundancy and subjected to various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving. After that, it is processed by IFFT together with the pilot signal, TMCC signal, and AC signal, and after adding a guard interval, it is orthogonally modulated to become an OFDM transmission wave.

[0194] Figure 4D In the structural example (2), the outer coding process, power diffusion process, byte interleaving, inner coding process, mapping process, and time interleaving are configured so as to be able to process each layer separately, such as the A layer, the B layer, and the C layer. However, Figure 4DIn the structural example of (2), not only the OFDM transmission wave of the horizontal polarization wave (H) but also the OFDM transmission wave of the vertical polarization wave (V) is generated, and the processing flow is branched into two systems. When branching from the processing system of the horizontal polarization wave (H) to the processing system of the vertical polarization wave (V), whether the same data as the processing system of the horizontal polarization wave (H) is branched to the processing system of the vertical polarization wave (V), or the data different from the processing system of the horizontal polarization wave (H) is branched to the processing system of the vertical polarization wave (V), or the data is not branched to the processing system of the vertical polarization wave (V) can be controlled by the processing system of the horizontal polarization wave (H). Figure 4B The segment structure described in (1) or (2) is different for each layer.

[0195] Figure 4D The external encoding, internal encoding, mapping and other processing shown in the structure of (2) are Figure 4D The structure of (1) has compatibility processing, and can be used Figure 4D More advanced processing is not used in the various processing of the structure of (1). Specifically, Figure 4D In the structure of (2), regarding the portion that is processed for each layer, in the layer of the mobile reception service that transmits the current terrestrial digital broadcasting and the current terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, the outer coding, inner coding, mapping, etc. are processed in the same manner as Figure 4D The structure of (1) has compatibility processing. In contrast, Figure 4D In the structure of (2), regarding the portion for processing each layer, for a layer capable of transmitting an advanced terrestrial digital broadcasting service capable of transmitting an image with a maximum resolution exceeding horizontal 1920 pixels × vertical 1080 pixels, the outer coding, inner coding, mapping, and other processing are configured to use Figure 4D More advanced processing that is not used in the various processing of the structure of (1) can be used.

[0196] In addition, in the polarization wave dual-use terrestrial digital broadcasting of this embodiment, the TMCC information described later can also be used to switch the layers and the allocation of the transmitted terrestrial digital broadcasting services, so it is preferably constructed so that the external coding, internal coding, mapping and other processing implemented on each layer can be switched using the TMCC information.

[0197] Furthermore, for layers transmitting advanced terrestrial digital broadcasting services capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally x 1080 pixels vertically, byte interleaving, bit interleaving, and time interleaving may be performed in a manner compatible with existing terrestrial digital broadcasting services, or may be performed in a more advanced and different manner. Alternatively, for layers transmitting advanced terrestrial digital broadcasting services, some interleaving may be omitted.

[0198] in addition, Figure 4D In the structure of (2), the input stream as the source of the layer for transmitting the mobile reception service of the current terrestrial digital broadcasting and the current terrestrial digital broadcasting service for transmitting images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically can be a TSP stream specified in the MPEG-2 system adopted in the current terrestrial digital broadcasting in the packet stream input to the channel coding unit 416. Figure 4D The input stream as the source of the layer transmitting the advanced terrestrial digital broadcasting service in the structure (2) may be a stream specified in the system other than the TSP stream specified in the MPEG-2 system, the MMT packet stream or the TLV including the MMT packet, etc., among the packet streams input to the channel coding unit 416. However, the TSP stream specified in the MPEG-2 system may also be used in the advanced terrestrial digital broadcasting service.

[0199] The above description Figure 4D In the structure of (2), from the input stream to the generation of OFDM transmission waves, in the layer of the mobile reception service of the current terrestrial digital broadcasting and the current terrestrial digital broadcasting service that transmits images with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels, the stream format and processing that are compatible with the current terrestrial digital broadcasting are maintained. As a result, the existing receiving device of the current terrestrial digital broadcasting service receives the data transmitted by the receiving device. Figure 4D In the case where the structure (2) generates one of the transmission waves of a horizontally polarized OFDM transmission wave and a vertically polarized OFDM transmission wave, the broadcast signal of the terrestrial digital broadcasting service can be correctly received and demodulated even for the layer of the mobile reception service that transmits the current terrestrial digital broadcasting and the current terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically.

[0200] in addition, Figure 4D In the structure of (2), in the layer of both segments of OFDM transmission waves using horizontally polarized waves and OFDM transmission waves using vertically polarized waves, an advanced terrestrial digital broadcasting service capable of transmitting images with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels vertically can be transmitted, and the broadcast signal of the advanced terrestrial digital broadcasting service can be received and demodulated using the broadcast receiving device 100 of an embodiment of the present invention.

[0201] That is, use Figure 4D The structure of (2) can generate digital broadcast waves that can appropriately receive and demodulate digital broadcasts in both broadcast receiving devices supporting advanced terrestrial digital broadcast services and in receiving devices for existing current terrestrial digital broadcast services.

[0202] Next, for Figure 4D (3) is explained. Figure 4D (3) is a configuration of the channel coding unit 416 when generating OFDM transmission waves of layer-division multiplexed terrestrial digital broadcasting according to this embodiment. Figure 4D In (3), the packet stream input from the multiplexing unit / conditional access processing unit 415 and subjected to re-multiplexing processing is also added with error correction redundancy and subjected to various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving. After that, it is processed by IFFT along with the pilot signal, TMCC signal, and AC signal, and after adding a guard interval, it is orthogonally modulated to become an OFDM transmission wave.

[0203] but, Figure 4D In the structure of (3), a modulated wave transmitted by an upper layer and a modulated wave transmitted by a lower layer are generated and multiplexed, thereby generating a digital broadcast wave, namely, an OFDM transmission wave. Figure 4D The processing system shown on the upper side of the structure of (3) is a processing system for generating a modulated wave for transmission in the upper layer, and the processing system shown on the lower side is a processing system for generating a modulated wave for transmission in the lower layer. Figure 4D (3) The data transmitted in the processing system for generating the modulated wave transmitted by the upper layer is a mobile reception service of the current terrestrial digital broadcasting and a current terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, Figure 4D (3) The various processes in the processing system for generating the modulated wave for upper layer transmission are related to Figure 4D The various processes of (1) are the same or compatible processes. Figure 4D (3) The modulated wave transmitted by the upper layer, such as Figure 4D The transmission wave of (1) also has Figure 4B The segment structure of (3). Therefore, Figure 4D The modulated wave transmitted by the upper layer of (3) is a digital broadcast wave compatible with the current mobile reception service of terrestrial digital broadcasting and the current terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically. Figure 4D (3) The data transmitted in the processing system for the modulation wave used for lower layer transmission is an advanced terrestrial digital broadcasting service capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically, for example, for processing such as outer coding, inner coding, and mapping, a configuration is used. Figure 4D More advanced processing that is not used in the various processing of the structure of (1) can be used.

[0204] Figure 4D(3) The modulated wave transmitted by the lower layer can be allocated to all 13 segments as the A layer for advanced terrestrial digital broadcasting services that can transmit images with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels vertically. Alternatively, it can also have Figure 4B The segment structure of (3) is used to transmit the current mobile reception service of terrestrial digital broadcasting with 1 segment A layer, and to transmit the advanced terrestrial digital broadcasting service that can transmit images with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels vertically with 12 segments B layer. In the latter case, Figure 4D Similarly, (2) can be configured so that the outer coding process and the time interleaving process are switched by each layer such as A layer and B layer. In the layer for transmitting the mobile reception service of the current terrestrial digital broadcast, it is necessary to maintain the process compatible with the current terrestrial digital broadcast. Figure 4D The description of (2) is the same.

[0205] Figure 4D In the structure of (3), a terrestrial digital broadcast wave, i.e., an OFDM transmission wave, is generated by multiplexing the modulated wave transmitted by the upper layer and the modulated wave transmitted by the lower layer. The technology for separating the modulated wave transmitted by the upper layer from the OFDM transmission wave is also installed in the existing receiving device for the current terrestrial digital broadcast service. Therefore, the broadcast signals of the current terrestrial digital broadcast mobile reception service and the current terrestrial digital broadcast service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, included in the modulated wave transmitted by the upper layer, can be correctly received and demodulated by the existing receiving device for the current terrestrial digital broadcast service. In contrast, the broadcast signals of the advanced terrestrial digital broadcast service that can transmit images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically, included in the modulated wave transmitted by the lower layer, can be received and demodulated by the broadcast receiving device 100 of the embodiment of the present invention.

[0206] That is, use Figure 4D The structure of (3) can generate digital broadcast waves that can properly receive and demodulate digital broadcasts in both broadcast receiving devices supporting advanced terrestrial digital broadcast services and in receiving devices for existing current terrestrial digital broadcast services. In addition, Figure 4D In the structure of (3), Figure 4D Unlike the structure of (2), there is no need to use multiple polarization waves, and OFDM transmission waves that can be received more easily can be generated.

[0207] In this embodiment Figure 4D (1) Figure 4D (2) and Figure 4DIn the OFDM transmission wave generation process of (3), three modes with different numbers of carriers are prepared, taking into account the adaptability to the distance between SFN sites and the tolerance to Doppler shift in mobile reception. In addition, other modes with different numbers of carriers can also be prepared. In the mode with a large number of carriers, the effective symbol length becomes longer. If the guard interval ratio (guard interval length / effective symbol length) is the same, the guard interval length becomes longer, which can make it resistant to multipath with a long delay time difference. On the other hand, in the case of the mode with a small number of carriers, the carrier interval becomes wider, which can be less susceptible to the influence of inter-carrier interference caused by Doppler shift that occurs in mobile reception and the like.

[0208] In this embodiment Figure 4D (1) Figure 4D (2) and Figure 4D In the OFDM transmission wave generation process of (3), parameters such as the carrier modulation method, the coding rate of the inner coding, and the time interleaving length can be set for each layer composed of one or more OFDM segments. Figure 4E The figure shows an example of transmission parameters for a single OFDM segment using pattern recognition in the system of this embodiment. The carrier modulation scheme in the figure refers to the modulation scheme of the "data" carrier. The SP signal, CP signal, TMCC signal, and AC signal use a modulation scheme different from that of the "data" carrier. Since these signals are more sensitive to noise than information volume, a modulation scheme that maps them to a constellation with fewer states (BPSK or DBPSK, i.e., two states) is used, which improves noise resistance.

[0209] In addition, among the values ​​of the number of carriers, the values ​​on the left side of the slash are the values ​​when QPSK, 16QAM, or 64QAM is set as the carrier modulation method, and the values ​​on the right side of the slash are the values ​​when DQPSK is set as the carrier modulation method. In the figure, the underlined parameters are parameters that are not compatible with the current mobile reception service of terrestrial digital broadcasting. Specifically, the modulation methods of 256QAM, 1024QAM, and 4096QAM of the "data" carrier are not used in the current terrestrial digital broadcasting service. Therefore, the present embodiment Figure 4D (1) Figure 4D (2) and Figure 4DIn the OFDM broadcast wave generation process (3), in the layer that needs to be compatible with the current terrestrial digital broadcasting service, the modulation methods of 256QAM, 1024QAM, and 4096QAM for the "data" carrier are not used. For the "data" carrier transmitted in the layer that supports advanced terrestrial digital broadcasting services, in addition to the modulation methods such as QPSK (number of states 4), 16QAM (number of states 16), and 64QAM (number of states 64) that are compatible with the current terrestrial digital broadcasting service, a modulation method with more values ​​such as 256QAM (number of states 256), 1024QAM (number of states 1024), or 4096QAM (number of states 4096) can be applied. In addition, a modulation method different from these modulation methods can also be used.

[0210] The pilot symbol (SP or CP) carrier modulation scheme can be BPSK (state number 2), which is compatible with current terrestrial digital broadcasting services. The AC carrier and TMCC carrier modulation scheme can be DBPSK (state number 2), which is compatible with current terrestrial digital broadcasting services.

[0211] In addition, LDPC coding is not used in current terrestrial digital broadcasting services as an internal coding method. Figure 4D (1) Figure 4D (2) and Figure 4D In the OFDM broadcast wave generation process (3), LDPC coding is not used in the processing of the layer that needs to be compatible with the current terrestrial digital broadcasting service. For data transmitted in the layer that supports advanced terrestrial digital broadcasting services, LDPC coding can be applied as inner coding. In addition, BCH coding is not adopted in the current terrestrial digital broadcasting service as an outer coding process. Therefore, the present embodiment Figure 4D (1) Figure 4D (2), and Figure 4D In the OFDM broadcast wave generation process (3), BCH coding is not used in the processing of the layer that needs to be compatible with the current terrestrial digital broadcasting service. BCH coding can be applied as outer coding to data transmitted in the layer that supports advanced terrestrial digital broadcasting services.

[0212] In addition, Figure 4F In the embodiment, Figure 4D (1) Figure 4D (2) and Figure 4D An example of transmission signal parameters per physical channel (6 MHz bandwidth) in the OFDM broadcast wave generation process (3). Figure 4D (1) Figure 4D (2) and Figure 4DIn the OFDM broadcast wave generation process of (3), in order to be compatible with the current terrestrial digital broadcasting service, basically, Figure 4F In principle, the parameters used in the broadcasting system should be compatible with the current terrestrial digital broadcasting services. Figure 4D In the case of (3) all segments are allocated to the advanced terrestrial digital broadcasting service in the modulation wave transmitted by the lower layer, it is not necessary to maintain compatibility with the existing terrestrial digital broadcasting service in the modulation wave. Figure 4D The modulated wave transmitted by the lower layer of (3) can also be used Figure 4F Parameters other than those shown.

[0213] Next, the carriers of the OFDM transmission waves of this embodiment are described. The carriers of the OFDM transmission waves of this embodiment include carriers for transmitting data such as images and audio, carriers for transmitting pilot signals (SP, CP, AC1, AC2) serving as a basis for demodulation, and carriers for transmitting TMCC signals, which serve as information such as the carrier's modulation format and convolutional coding rate. For these transmissions, a number of carriers equivalent to 1 / 9 of the number of carriers per segment is used. Furthermore, concatenated coding is used for error correction, shortened Reed-Solomon (204, 188) coding is used for outer coding, and punctured convolutional coding with a constraint length of 7 and a coding rate of 1 / 2 as the mother code is used for inner coding. Both outer and inner coding can use codes different from those described above. The information rate varies depending on parameters such as the carrier modulation format, convolutional coding rate, and guard interval ratio.

[0214] In addition, 204 symbols are defined as one frame, and one frame includes an integer number of TSPs. Transmission parameters are switched at the frame boundary.

[0215] The pilot signals serving as a reference for demodulation include SP (Scattered Pilot), CP (Continuous Pilot), AC (Auxiliary Channel) 1, and AC2. Figure 4G An example of a schematic diagram of the configuration of pilot signals, etc. in a segment in the case of synchronous modulation (QPSK, 16QAM, 64QAM, 256QAM, 1024QAM, 4096QAM, etc.) is shown in FIG. The SP is inserted into the synchronously modulated segment and is transmitted once for every 12 carriers in the carrier number (frequency axis) direction and once for every 4 symbols in the OFDM symbol number (time axis) direction. Since the amplitude and phase of the SP are known, they can be used as a reference for synchronous demodulation. Figure 4H An example of a schematic diagram of the arrangement of pilot signals, etc., within a segment in the case of differential modulation (DQPSK, etc.) is shown in FIG. CP is a continuous signal inserted at the left end of a differentially modulated segment and is used for demodulation.

[0216] AC1 and AC2 carry information on the CP. In addition to being pilot signals, they are also used to transmit information for broadcast operators. They can also be used to transmit other information.

[0217] in addition, Figure 4G and Figure 4H The configuration diagrams shown in the figure are examples for Mode 3, with carrier numbers ranging from 0 to 431. For Mode 1 and Mode 2, the carrier numbers range from 0 to 107 or 0 to 215, respectively. Furthermore, the carriers transmitting AC1, AC2, and TMCC can be predetermined for each segment. Furthermore, the carriers transmitting AC1, AC2, and TMCC are randomly arranged in the frequency direction to mitigate the effects of periodic degradation of channel characteristics caused by multipath.

[0218] [TMCC signal]

[0219] The TMCC signal transmission layer structure and OFDM segment transmission parameters, as well as information about the demodulation operation of the receiver (TMCC information). The TMCC signal is transmitted using the carrier specified for TMCC transmission in each segment. Figure 5A An example of the bit allocation of the TMCC carrier is shown in FIG. The TMCC carrier consists of 204 bits (B0 to B203). B0 is the demodulation reference signal for the TMCC symbol, which has a specified amplitude and phase reference. B1 to B16 are synchronization signals, consisting of 16-bit words. Two types of synchronization signals, w0 and w1, are specified, and w0 and w1 are transmitted alternately every frame. B17 to B19 are used to identify the segment format, identifying whether each segment is a differential modulation unit or a synchronous modulation unit. B20 to B121 record TMCC information. B122 to B203 are parity check bits.

[0220] The TMCC information of the OFDM transmission wave of this embodiment is composed of, for example, a system identifier, a transmission parameter switching indicator, a start control signal (a start flag for emergency alert broadcasting), current information, subsequent information, a frequency conversion processing identifier, a physical channel number identifier, a main signal identifier, a 4K signal transmission layer identifier, an additional layered transmission identifier, etc., which are information used to assist the demodulation and decoding operations of the receiver. The current information indicates the current layer structure and transmission parameters, and the subsequent information indicates the layer structure and transmission parameters after switching. The switching of transmission parameters is performed in frame units. Figure 5B An example of bit allocation of TMCC information is shown in FIG. Figure 5CAn example of the structure of transmission parameter information included in the current information / subsequent information is shown in FIG. The link transmission phase correction amount is control information used in common transmission systems such as ISDB-TSB (ISDB for Terrestrial Sound Broadcasting), and its detailed description is omitted here.

[0221] exist Figure 5D An example of the bit allocation of the system identifier is shown in FIG. 2 bits are allocated to the signal used for the system identifier. In the case of the current terrestrial digital television broadcasting system, "00" is set. In the case of a terrestrial digital sound broadcasting system with a common transmission method, "01" is set. In addition, in the case of an advanced terrestrial digital television broadcasting system such as the polarization-based terrestrial digital broadcasting or layer-division multiplexing terrestrial digital broadcasting of this embodiment, "10" is set. In the advanced terrestrial digital television broadcasting system, by transmitting broadcast waves using the polarization-based transmission method or the layer-division multiplexing method, 2K broadcast programs (broadcast programs with images of 1920 pixels horizontally × 1080 pixels vertically, and broadcast programs with images of a resolution lower than that) and 4K broadcast programs (broadcast programs with images exceeding 1920 pixels horizontally × 1080 pixels vertically) can be simultaneously transmitted within the same service.

[0222] The transmission parameter switching indicator is used to notify the receiver of the switching timing by counting down when the transmission parameters are switched. This indicator is usually "1111" and is decremented by 1 per frame starting from 15 frames before the switching when the transmission parameters are switched. The switching timing is synchronized with the next frame that sends "0000". The indicator value returns to "1111" after "0000". Figure 5B Countdown is performed when at least one of the following parameters is present: the system identifier of the TMCC information, the transmission parameters included in the current information / subsequent information, the frequency conversion process identifier, the main signal identifier, the 4K signal transmission layer identifier, and the additional layer transmission identifier. Countdown is not performed when only the start control signal of the TMCC information is switched.

[0223] The activation control signal (activation flag for emergency alert broadcast) is set to "1" when activation control of the receiver is performed during the emergency alert broadcast, and is set to "0" when activation control is not performed.

[0224] The partial reception flag for each of the current and subsequent messages is set to "1" if the segment in the center of the transmission band is set for partial reception, and is set to "0" otherwise. When segment 0 is set for partial reception, that layer is defined as layer A. If there is no subsequent message, the partial reception flag is set to "1."

[0225] exist Figure 5E An example of bit allocation for the carrier modulation mapping method (modulation method of the data carrier) in the transmission parameters of each layer of the current information / successor information is shown in the figure. When the 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. If it is an unused layer or there is no successor information, the parameter is set to "111".

[0226] Settings such as the coding rate and time interleaving length can be set based on the grouping information for each layer of the current and subsequent information. The number of segments for each layer is represented by a 4-bit value. If the layer is unused or there is no subsequent information, "1111" is set. Furthermore, settings such as the mode and guard interval ratio are independently detected by the receiver, so they do not need to be transmitted using TMCC information.

[0227] exist Figure 5F An example of bit allocation of the frequency conversion process identifier is shown in FIG. Figure 2A "0" is set when the frequency conversion process (in the case of a polarization dual-use transmission system) or the frequency conversion and amplification process (in the case of a layer division multiplexing transmission system) described later is performed in the conversion unit 201T or the conversion unit 201L. "1" is set when the frequency conversion process and the frequency conversion and amplification process are not performed. This parameter can be configured to be set to "1" when transmitting from a broadcast station, and to be rewritten to "0" in the conversion unit 201T or the conversion unit 201L when the frequency conversion process or the frequency conversion and amplification process is performed by the conversion unit 201T or the conversion unit 201L. In this way, when receiving by the second modem 130T or the third modem 130L of the broadcast receiving device 100, if the bit of the frequency conversion process identifier is "0", it can be recognized that the OFDM transmission wave has undergone frequency conversion processing after being transmitted from the broadcast station.

[0228] In the polarization-based terrestrial digital broadcasting of this embodiment, the frequency conversion processing identifier bit can be set and rewritten for each of the multiple polarization waves. Figure 2AIf the frequency conversion unit 201T performs frequency conversion on the polarization of only one of the multiple polarizations, the frequency conversion process identifier bits included in the OFDM transmission waves of both frequencies can be maintained at "1." Furthermore, if the frequency conversion unit 201T performs frequency conversion on only one of the multiple polarizations, the frequency conversion process identifier bits included in the OFDM transmission waves of the frequency-converted polarization can be rewritten to "0" in the conversion unit 201T. Furthermore, if the frequency conversion unit 201T performs frequency conversion on both of the multiple polarizations, the frequency conversion process identifier bits included in the OFDM transmission waves of the frequency-converted polarizations can be rewritten to "0" in the conversion unit 201T. In this way, the broadcast reception conversion device 100 can identify whether frequency conversion has been performed for each of the multiple polarizations.

[0229] Since this frequency conversion process identifier bit is not defined in current terrestrial digital broadcasting, it is ignored by terrestrial digital broadcasting receivers currently in use by users. However, this bit may also be used in new terrestrial digital broadcasting services that improve upon current terrestrial digital broadcasting and transmit images with a maximum resolution of 1920 pixels horizontally x 1080 pixels vertically. In this case, the first modem 130C of the broadcast receiving device 100 according to the embodiment of the present invention may also be configured to support this new terrestrial digital broadcasting service.

[0230] In addition, as a modification, it is also possible to use Figure 2A This parameter is set to "0" when transmitting from a broadcast station, assuming that the conversion unit 201T or the conversion unit 201L performs frequency conversion processing or frequency conversion amplification processing on the OFDM transmission wave. Alternatively, if the received broadcast wave is not an advanced terrestrial digital broadcast service, this parameter may be set to "1."

[0231] exist Figure 5GAn example of the bit allocation of the physical channel number identifier is shown in FIG. The physical channel number identifier is composed of a 6-bit code and identifies the physical channel number (13 to 52ch) of the received broadcast wave. When the received broadcast wave is not an advanced terrestrial digital broadcasting service, this parameter is set to "111111". The bits of the physical channel number identifier are not defined in the current terrestrial digital broadcasting. In the current terrestrial digital broadcasting receiving device, the physical channel number of the broadcast wave specified by the broadcast station cannot be obtained from the TMCC signal and AC signal. In the broadcast receiving device 100 of the embodiment of the present invention, the bits of the physical channel number identifier of the received OFDM transmission wave are used to know the physical channel number set by the broadcast station for the OFDM transmission wave even if the carrier other than the TMCC signal and the AC signal is not demodulated. In addition, the physical channels 13ch to 52ch are pre-allocated in the frequency band of 470 to 710MHz with a bandwidth of 6MHz per channel. Therefore, the broadcast receiving apparatus 100 can know the physical channel number of the OFDM transmission wave based on the bits of the physical channel number identifier, that is, can know the frequency band in which the OFDM transmission wave is transmitted over the air as a terrestrial digital broadcast wave.

[0232] In the polarization-based terrestrial digital broadcasting of this embodiment, the broadcast station allocates the physical channel number identifier bits to each of the multiple polarization waves in the bandwidth that originally constitutes one physical channel in the generation process of the OFDM transmission wave, and attaches the same physical number. Figure 2A The frequency of only one of the multiple polarized waves is converted in the conversion unit 201T. Therefore, if the frequencies of the multiple polarized waves in the pair received by the broadcast receiving device 100 differ from each other, and if there is no way to determine that the multiple polarized waves with different frequencies are originally paired, the broadcast receiving device cannot use the polarized waves of both polarized waves in the dual-polarization terrestrial digital broadcast to demodulate the advanced terrestrial digital broadcast. In this case, if the physical channel number identifier bits described above are used, when transmission waves with the same physical channel number identifier bits in the broadcast receiving device 100 exist at multiple different frequencies, they can be identified as transmission waves transmitted as paired polarized waves that originally constituted a single physical channel on the broadcasting station side. This makes it possible to use these multiple transmission waves with the same value to demodulate the advanced terrestrial digital broadcast of the dual-polarization terrestrial digital broadcast.

[0233] exist Figure 5H An example of the bit allocation of the main signal identifier is shown in . In this example, the bits of the main signal identifier are arranged in bit B117.

[0234] When the transmitted OFDM transmission wave is a transmission wave for dual-polarization terrestrial digital broadcasting, this parameter is set to "1" in the TMCC information of the transmission wave transmitted using the main polarization wave. It is set to "0" in the TMCC information of the transmission wave transmitted using the secondary polarization wave. The transmission wave transmitted using the main polarization wave refers to the polarization wave signal with the same polarization direction as that used in the current terrestrial digital broadcasting service, among the vertically polarized wave signal and the horizontally polarized wave signal. That is, in areas where horizontally polarized wave transmission is adopted in the current terrestrial digital broadcasting service, the horizontally polarized wave is the main polarization wave and the vertically polarized wave is the secondary polarization wave. Furthermore, in areas where vertically polarized wave transmission is adopted in the current terrestrial digital broadcasting service, the vertically polarized wave is the main polarization wave and the horizontally polarized wave is the secondary polarization wave.

[0235] The broadcast receiving device 100 receiving the transmission wave of the polarized dual-use terrestrial digital broadcast according to the embodiment of the present invention can use the bits of the main signal identifier to identify whether the received transmission wave was transmitted using the main polarization wave or the sub-polarization wave. For example, by using this main polarization and sub-polarization identification process, it is possible to perform the initial scan, described later, on the transmission wave transmitted using the main polarization wave first, and then perform the initial scan on the transmission wave transmitted using the sub-polarization wave after the initial scan of the transmission wave transmitted using the main polarization wave is completed.

[0236] Details of the layers and segments of the dual-polarization terrestrial digital broadcasting and the configuration example of the digital broadcasting service to be transmitted in this embodiment are described later. When transmitting a current terrestrial digital broadcasting service using a layer consisting of segments included only in the main polarization wave, and transmitting an advanced terrestrial digital service using a layer consisting of segments included in both the main polarization wave and the secondary polarization wave, it is possible to first perform an initial scan of the transmission wave transmitted using the main polarization wave to complete the initial scan of the current terrestrial digital broadcasting service, and then perform an initial scan of the transmission wave transmitted using the secondary polarization wave to perform the initial scan of the advanced terrestrial digital broadcasting service. This is advantageous because the initial scan of the advanced terrestrial digital broadcasting service can be performed after the initial scan of the current terrestrial digital broadcasting service is completed, and the initial scan settings for the current terrestrial digital broadcasting service can be reflected in the initial scan settings for the advanced terrestrial digital broadcasting service.

[0237] In addition, the meanings of "1" and "0" in the bits of the main signal identifier may be defined in the opposite manner to the above description.

[0238] Alternatively, a polarization direction identifier bit can be used as a parameter of the TMCC information, replacing the primary signal identifier bit. Specifically, the broadcast station can set the polarization direction identifier bit to "1" for horizontally polarized transmission waves and "0" for vertically polarized transmission waves. The broadcast receiving device 100 receiving polarized dual-use terrestrial digital broadcasting according to an embodiment of the present invention can use this polarization direction identifier bit to identify the polarization direction of the received transmission wave. For example, using this polarization direction identification process enables, during the initial scan described later, initial scanning of the horizontally polarized transmission wave to be performed first, followed by initial scanning of the vertically polarized transmission wave after the initial scan of the horizontally polarized transmission wave is completed. The effects of this process can be explained by replacing "primary polarization wave" with "horizontally polarized wave" and "secondary polarization wave" with "vertically polarized wave" in the initial scan section of the description of the primary signal identifier bit above, so further explanation will be omitted.

[0239] Furthermore, the meanings of "1" and "0" in the bits of the polarization direction identifier may be defined in the opposite manner to the above description.

[0240] In addition, the first signal second signal identifier bit can also be used as a parameter of the TMCC information instead of the above-mentioned main signal identifier bit. Specifically, the polarization wave of one of the horizontal polarization wave and the vertical polarization wave is defined as the first polarization wave, the broadcast signal of the transmission wave transmitted by the first polarization wave is defined as the first signal, and the first signal second signal identifier bit is set to "1" on the broadcast station side. In addition, the polarization wave of the other is defined as the second polarization wave, the broadcast signal of the transmission wave transmitted by the second polarization wave is defined as the second signal, and the first signal second signal identifier bit is set to "0" on the broadcast station side. In the broadcast receiving device 100 that receives the transmission wave of the polarization wave dual-use terrestrial digital broadcasting according to the embodiment of the present invention, by using the first signal second signal identifier bit, it is possible to identify in which polarization direction the received transmission wave is transmitted during transmission. In addition, the first signal second signal identifier bit, compared with the definition of the bit of the above-mentioned main signal identifier, simply replaces the concepts of "primary polarization wave" and "secondary polarization wave" with "first polarization wave" and "secondary polarization wave". The processing and effects in the broadcast receiving device 100 only need to replace the "primary polarization wave" with "first polarization wave" and the "secondary polarization wave" with "secondary polarization wave" in the part of the description of the bit of the above-mentioned main signal identifier regarding the processing of the broadcast receiving device 100, so further explanation is omitted.

[0241] In addition, the meanings of "1" and "0" in the first signal and second signal identifier bits may be defined in the opposite manner to the above description.

[0242] Next, in the layer-division multiplexed terrestrial digital broadcasting transmission wave of this embodiment, the upper and lower layer identifier bits can be used as a parameter of the TMCC information, replacing the above-mentioned main signal identifier bits. Specifically, the upper and lower layer identifier bits can be set to "1" in the TMCC information of the modulated wave transmitted using the upper layer, and set to "0" in the TMCC information of the modulated wave transmitted using the lower layer. Furthermore, if the received broadcast wave is not an advanced terrestrial digital broadcasting service, this parameter can be set to "1."

[0243] In the layer division multiplexing terrestrial digital broadcasting of this embodiment, the lower layer of the multiple modulated waves originally transmitted using the upper layer and lower layer of one physical channel in the generation process of the OFDM transmission wave on the broadcast station side may be used depending on the setting environment of the broadcast receiving device 100. Figure 2A The conversion unit 201L performs frequency conversion and signal amplification. When the broadcast receiving device 100 receives a transmission wave of layer-division multiplexed terrestrial digital broadcasting, it can identify whether the modulated wave was originally transmitted using the upper layer or the lower layer based on the upper and lower layer identifier bits. For example, this identification process allows initial scanning for an advanced terrestrial digital broadcasting service transmitted using the lower layer to be performed after initial scanning for the current terrestrial digital broadcasting service transmitted using the upper layer is completed, and the initial scanning settings for the current terrestrial digital broadcasting service can be reflected in the initial scanning settings for the advanced terrestrial digital broadcasting service. Furthermore, in the third modem unit 130L of the broadcast receiving device 100, this identification result can also be used to switch the processing between the demodulation unit 133S and the demodulation unit 133L.

[0244] In the following descriptions of the dual-polarization transmission method in the various embodiments, unless otherwise specified, the horizontal polarization is used as the primary polarization and the vertical polarization is used as the secondary polarization. However, the primary and secondary relationships of the horizontal and vertical polarizations may be reversed.

[0245] exist Figure 5I An example of bit allocation of a 4K signal transmission layer identifier is shown in FIG.

[0246] If the broadcast wave being transmitted is the transmission wave of the dual-polarization terrestrial digital broadcast service of this embodiment, the bits of the 4K signal transmission layer identifier can indicate whether 4K broadcast programs are transmitted using both horizontally and vertically polarized signals for Layer B and Layer C, respectively. One bit is allocated for each of the settings for Layer B and Layer C. For example, if the bit of the 4K signal transmission layer identifier for each Layer B and Layer C is "0," it indicates that 4K broadcast programs are transmitted using both horizontally and vertically polarized signals in that Layer. If the bit of the 4K signal transmission layer identifier for each Layer B and Layer C is "1," it indicates that 4K broadcast programs are not transmitted using both horizontally and vertically polarized signals in that Layer. In this way, the broadcast receiving device 100 can use the bits of the 4K signal transmission layer identifier to identify whether 4K broadcast programs are transmitted using both horizontally and vertically polarized signals in each Layer B and Layer C.

[0247] Furthermore, if the broadcast wave being transmitted is the broadcast wave of the layer-division multiplexed terrestrial digital broadcast service of this embodiment, the bits of the 4K signal transmission layer identifier can simply indicate whether the lower layer is used to transmit the 4K broadcast program. If "B119" of this parameter is "0," the lower layer is used to transmit the 4K broadcast program. If "B119" of this parameter is "1," the lower layer is not used to transmit the 4K broadcast program. In this way, the broadcast receiving device 100 can use the bits of the 4K signal transmission layer identifier to identify whether the lower layer is used to transmit the 4K broadcast program.

[0248] In addition, when this parameter is "0", as the carrier modulation mapping method, Figure 5C In addition to the basic modulation schemes shown above, NUC (Non-Uniform Constellation) modulation can also be used. In this case, current / subsequent information related to B-layer / C-layer transmission parameter supplementary information can be transmitted using AC1 or the like.

[0249] In addition, when the broadcast wave to be transmitted is not an advanced terrestrial digital broadcasting service, this parameter can be set to "1".

[0250] In addition, the definition of the bits "0" and "1" of the 4K signal transmission layer identifier described above may be reversed from the above description.

[0251] exist Figure 5JAn example of bit allocation for the additional layer transmission identifier is shown in FIG. The bits of the additional layer transmission identifier indicate whether the B layer and C layer of the transmission wave transmitted using the sub-polarization wave are to be used as a virtual D layer or a virtual E layer, respectively, when the transmitted broadcast wave is the dual-polarization terrestrial digital broadcast service of this embodiment.

[0252] For example, in the example shown in the figure, the bit assigned to B120 is the D-layer transmission identifier bit. If this parameter is "0," the B-layer transmitted with the secondary polarization is used as a virtual D-layer. Specifically, within the segments transmitted with the secondary polarization, segments with the same segment number as segments subordinate to the B-layer transmitted with the primary polarization are considered to be a separate layer from the B-layer transmitted with the primary polarization, namely, the D-layer. If this parameter is "1," the B-layer transmitted with the secondary polarization is used as the B-layer, not as a virtual D-layer.

[0253] For example, if the bit assigned to B121 is the E-layer transmission identifier bit, and this parameter is "0," the C-layer transmitted with the secondary polarization is used as a virtual E-layer. Specifically, a segment group with the same segment number as a segment subordinate to the C-layer transmitted with the primary polarization, within the segments transmitted with the secondary polarization, is considered to be an E-layer, a layer separate from the C-layer transmitted with the primary polarization. If this parameter is "1," the C-layer transmitted with the secondary polarization is used as the C-layer, not as a virtual E-layer.

[0254] In this way, the broadcast receiving device 100 can use the bits of the additional layer transmission identifier (D layer transmission identifier bit and / or E layer transmission identifier bit) to identify whether the D layer and E layer are transmitted using the sub-polarization wave. Figure 5J The parameters of the additional layer transmission identifier shown above enable the use of new layers beyond the three layers limited to A layer, B layer, and C layer in the current terrestrial digital broadcasting. Figure 5J In the example, layers D and E).

[0255] In addition, when this parameter is "0", Figure 5C Parameters such as the carrier modulation mapping scheme, coding rate, and time interleaving length shown are different between the virtual D layer / virtual E layer and the B layer / C layer. In this case, if current / subsequent information regarding parameters such as the carrier modulation mapping scheme, convolutional coding rate, and time interleaving length of the virtual D layer / virtual E layer is transmitted using AC information (e.g., AC1), the broadcast receiving device 100 can know the parameters such as the carrier modulation mapping scheme, convolutional coding rate, and time interleaving length of the virtual D layer / virtual E layer.

[0256] Furthermore, as a modified example, when the bit of the additional layer transmission identifier (D-layer transmission identifier bit and / or E-layer transmission identifier bit) is "0," the transmission parameters of the B-layer and / or C-layer for the current / subsequent information of the TMCC information transmitted using the secondary polarization wave are switched to the transmission parameters of the virtual D-layer and / or virtual E-layer. In this case, when using the virtual D-layer and / or virtual E-layer, the A-layer, B-layer, and C-layer are used in the primary polarization wave, and the transmission parameters of these layers are used for the current / subsequent information transmission of the TMCC information transmitted using the primary polarization wave. Alternatively, the A-layer, D-layer, and E-layer are used in the secondary polarization wave, and the transmission parameters of these layers are used for the current / subsequent information transmission of the TMCC information transmitted using the secondary polarization wave. In this case, the broadcast receiving device 100 can also obtain parameters such as the carrier modulation mapping method, convolutional coding rate, and time interleaving length for the virtual D-layer and virtual E-layer.

[0257] Furthermore, when the broadcast wave being transmitted is not an advanced terrestrial digital broadcasting service, or when it is an advanced terrestrial digital broadcasting service but adopts a layer division multiplexing transmission method, the parameter may be set to "1".

[0258] The parameters of the additional layer transmission identifier may be stored in both the TMCC information of the main polarization and the TMCC information of the sub-polarization. However, the above-mentioned processing can be realized as long as the parameters are stored in at least the TMCC information of the sub-polarization.

[0259] Furthermore, the definitions of "0" and "1" of the bits of the additional layer transmission identifier described above may be reversed from the above description.

[0260] Furthermore, if the 4K signal transmission layer identifier parameter indicates that the B layer is used for 4K broadcast program transmission, the broadcast receiving device 100 may ignore the D layer transmission identifier bit even if the D layer transmission identifier bit indicates that the B layer is used as a virtual D layer. Similarly, if the 4K signal transmission layer identifier parameter indicates that the C layer is used for 4K broadcast program transmission, the broadcast receiving device 100 may ignore the E layer transmission identifier bit even if the E layer transmission identifier bit indicates that the C layer is used as a virtual E layer. By clarifying the priority of the bits used in the determination process in this way, conflicts in the determination process within the broadcast receiving device 100 can be avoided.

[0261] Furthermore, in the transmitted broadcast wave, the frequency conversion process identifier bits, physical channel number identifier bits, main signal identifier bits, 4K signal transmission identifier bits, and additional layer transmission identifier bits, etc., should all be set to "1" in principle when the system identifier parameter is not "10." Alternatively, even when the system identifier parameter is not "10," if the frequency conversion process identifier bits, physical channel number identifier bits, main signal identifier bits, 4K signal transmission identifier bits, and additional layer transmission identifier bits are abnormally not "1" due to some problem, the broadcast receiving device 100 may ignore the bits that are not "1" and determine that all bits are "1."

[0262] Furthermore, in advanced terrestrial digital broadcasting services using a dual-polarization transmission method, the TMCC information for horizontally polarized and vertically polarized transmission waves may be the same or different. Similarly, in advanced terrestrial digital broadcasting services using a layer division multiplexing transmission method, the TMCC information for upper and lower layer transmission waves may be the same or different. Furthermore, the parameters of the frequency conversion processing identifier, main signal identifier, and additional layer transmission identifier may be included only in the TMCC information for the secondary polarized or lower layer transmission waves.

[0263] In addition, the above description describes an example in which the parameters of the frequency conversion processing identifier, the parameters of the main signal identifier, the parameters of the polarization direction identifier, the parameters of the first and second signal identifiers, the parameters of the upper and lower layer identifiers, the parameters of the 4K signal transmission layer identifier, and the parameters of the additional layered transmission identifier are included in the TMCC signal (TMCC carrier) for transmission. However, these parameters can also be included in the AC signal (AC carrier) for transmission. In other words, these parameters can be used to transmit signals of carriers (TMCC carriers, AC carriers, etc.) modulated by a modulation scheme that is mapped to fewer modulation scheme states than the number of data carrier modulation scheme states.

[0264] [AC signal]

[0265] The AC signal is an additional information signal related to broadcasting, and is additional information on the transmission control of the modulated wave or earthquake warning information, etc. Among them, the earthquake warning information is transmitted using the AC carrier of segment 0. On the other hand, the additional information on the transmission control of the modulated wave can be transmitted using any AC carrier. Figure 6AAn example of AC signal bit allocation is shown in Figure 1. The AC signal consists of 204 bits (B0 to B203). B0 is the demodulation reference signal for the AC symbol, with a specified amplitude and phase reference. B1 to B3 are signals used to identify the structure of the AC signal. B4 to B203 are used to transmit additional information regarding the transmission control of the modulated wave or to transmit earthquake warning information.

[0266] exist Figure 6B An example of the bit allocation of the structure identifier of the AC signal is shown in . When B4 to B203 of the AC signal are used to transmit earthquake warning information, the parameter is set to "001" or "110". The parameter of the structure identifier ("001" or "110") when transmitting earthquake warning information is set to the same code as the starting 3 bits (B1 to B3) of the synchronization signal of the TMCC signal, and is sent alternately per frame at the same timing as the TMCC signal. In addition, when the parameter is a value other than the above, it means that B4 to B203 of the AC signal is used to transmit additional information about the transmission control of the modulated wave. B4 to B203 of the AC signal can also be used to transmit additional information about the transmission control of the modulated wave. In this case, regarding the parameter of the structure identifier of the AC signal, "000" and "111", or "010" and "101", or "011" and "100" are sent alternately per frame.

[0267] B4 to B203 of the AC signal are used to transmit additional information on the transmission control of the modulated wave or to transmit earthquake warning information.

[0268] Additional information regarding the transmission control of the modulated wave can be transmitted using a variety of bit structures. For example, the frequency conversion process identifier, physical channel number identifier, main signal identifier, 4K signal transmission layer identifier, and additional layer transmission identifier, described in the TMCC signal description, can be allocated bits within the additional information regarding the transmission control of the modulated wave in the AC signal and transmitted in place of or in addition to the TMCC signal. This allows the broadcast receiving device 100 to perform the various identification processes described in the TMCC signal description. Furthermore, additional information regarding the transmission parameters of the 4K broadcast program's transmission layer when any parameter in the 4K signal transmission layer identifier is "0" or current / successive information regarding the transmission parameters of the virtual D layer / virtual E layer when any parameter in the additional layer transmission identifier is "0" can also be allocated. This allows the broadcast receiving device 100 to obtain the transmission parameters of each layer and control the demodulation process for each layer using these parameters.

[0269] Earthquake warning information can also be transmitted using Figure 6CThe bit allocation is as shown. Earthquake warning information consists of a synchronization signal, a start / end flag, an update flag, a signal identifier, earthquake warning detailed information, a CRC, and parity check bits. The synchronization signal consists of a 13-bit code, identical to the 13 bits (B4 to B16) of the TMCC signal's synchronization signal, excluding the first three bits. The AC signal's structure identifier, when transmitting earthquake warning information, is a 16-bit code combining the structure identifier and the synchronization signal. This is the same 16-bit synchronization word as the TMCC synchronization signal. The start / end flag, which indicates the start / end timing of earthquake warning information, consists of a 2-bit code. The start / end flag changes from "11" to "00" at the start of earthquake warning information transmission and from "00" to "11" at the end of earthquake warning information transmission. The update flag, which consists of a 2-bit code, increases by "1" each time the content of the transmitted earthquake warning detailed information changes, starting from "00" when the start / end flag is "00." It returns to "00" after "11." When the start / end flag is "11", the update flag is also "11".

[0270] exist Figure 6D An example of the bit allocation of the signal identifier is shown in . The signal identifier consists of a 3-bit code and is used to identify the type of earthquake warning detailed information. When the parameter is "000", it means "earthquake warning detailed information (corresponding area exists)". When the parameter is "001", it means "earthquake warning detailed information (no corresponding area exists)". When the parameter is "010", it means "test signal of earthquake warning detailed information (corresponding area exists)". When the parameter is "011", it means "test signal of earthquake warning detailed information (no corresponding area exists)". When the parameter is "111", it means "no earthquake warning detailed information exists". In addition, when the start / end flag is "00", the signal identifier is "000" or "001" or "010" or "011". When the start / end flag is "11", the signal identifier is "111".

[0271] The earthquake warning detailed information consists of an 88-bit code. When the signal identifier is "000" or "001" or "010" or "011", the earthquake warning detailed information transmits information about the current time when the earthquake warning information is sent, information indicating the area that is the target of the earthquake warning, and information such as the latitude / longitude / intensity of the epicenter of the earthquake that is the target of the earthquake warning. Figure 6EAn example of bit allocation of earthquake warning detailed information when the signal identifier is "000" or "001" or "010" or "011" is shown in FIG. In addition, when the signal identifier is "111", the bits of the earthquake warning detailed information can be used to transmit a code for identifying a broadcasting operator. Figure 6F ] shows an example of bit allocation of earthquake warning detailed information when the signal identifier is "111".

[0272] The CRC is a code generated using a predetermined generator polynomial for bits B21 to B111 in the earthquake warning information. The parity check bits are a code generated using a shortened code (187, 105) of the difference set cyclic code (273, 191) for bits B17 to B121 in the earthquake warning information.

[0273] In the broadcast receiving device 100, it is possible to use Figure 6C 、 Figure 6D 、 Figure 6E 、 Figure 6F The parameters for earthquake alerts described in [2] are used to perform various emergency response controls. For example, the system can control the presentation of information about earthquake alerts, switch low-priority display content to the display about earthquake alerts, and terminate the application display and switch to the display about earthquake alerts or broadcast program images.

[0274] exist Figure 6G An example of bit allocation of additional information on transmission control of the modulated wave is shown in FIG. Additional information on transmission control of the modulated wave is composed of a synchronization signal, current information, subsequent information, parity bits, etc. The synchronization signal is composed of a 13-bit code, which is set to be the same as the 13 bits (B4 to B16) of the synchronization signal of the TMCC signal excluding the first 3 bits. The structure identifier of the AC signal indicates that when additional information on transmission control of the modulated wave is transmitted, the 16-bit code formed by combining the structure identifier and the synchronization signal is a 16-bit synchronization word that conforms to the synchronization signal of the TMCC. The current information indicates additional information on transmission parameters when transmitting 4K broadcast programs using the B layer or C layer, and current information on transmission parameters of the virtual D layer or virtual E layer. The subsequent information indicates additional information on transmission parameters when transmitting 4K broadcast programs using the B layer or C layer, and information after switching on transmission parameters of the virtual D layer or virtual E layer.

[0275] Figure 6GIn the example, B18 to B30 of the current information is the current information of the B-layer transmission parameter additional information, indicating the current information of the transmission parameter additional information when the B-layer is used to transmit 4K broadcast programs. In addition, B31 to B43 of the current information is the current information of the C-layer transmission parameter additional information, indicating the current information of the transmission parameter additional information when the C-layer is used to transmit 4K broadcast programs. In addition, B70 to B82 of the subsequent information is the information after the transmission parameters of the B-layer transmission parameter additional information are switched, indicating the information after the transmission parameters of the transmission parameter additional information are switched when the B-layer is used to transmit 4K broadcast programs. In addition, B83 to B95 of the subsequent information is the information after the transmission parameters of the C-layer transmission parameter additional information are switched, indicating the information after the transmission parameters of the transmission parameter additional information are switched when the C-layer is used to transmit 4K broadcast programs. Here, the transmission parameter additional information refers to the Figure 5C The transmission parameters of the TMCC information shown are additionally transmitted, thereby expanding the standard of the transmission parameters related to modulation. The specific content of the transmission parameter additional information will be described later.

[0276] Figure 6G In the example of , B44 to B56 of the current information is the current information about the transmission parameters of the virtual D layer when the virtual D layer is applied. B57 to B69 of the current information is the current information about the transmission parameters of the virtual E layer when the virtual E layer is applied. In addition, B96 to B108 of the subsequent information is the information about the transmission parameters of the virtual D layer after switching when the virtual D layer is applied. B109 to B121 of the current information is the information about the transmission parameters of the virtual E layer after switching when the virtual E layer is applied. The parameters stored in the transmission parameters of the virtual D layer and the transmission parameters of the virtual E layer can be the same as Figure 5C Same as shown.

[0277] The virtual D layer and the virtual E layer are layers that do not exist in current terrestrial digital broadcasting. Figure 5B The TMCC information needs to maintain compatibility with the current terrestrial digital broadcasting, so it is not easy to increase the number of bits. Figure 6G As shown, the transmission parameters regarding the virtual D layer and the virtual E layer are stored in the AC information.

[0278] This allows the TMCC information to be transmitted to receiving devices while maintaining compatibility with existing terrestrial digital broadcasting, while also transmitting information regarding the modulation of the new virtual D layer and virtual E layer. Consequently, when the B layer and C layer of the transmission wave transmitted using the secondary polarization in the broadcast wave of the dual-polarization terrestrial digital broadcasting service of this embodiment are used as the virtual D layer and virtual E layer, the transmission parameters of the virtual D layer and virtual E layer of the transmission wave transmitted using the secondary polarization can be set to be different from the transmission parameters of the B layer and C layer of the transmission wave transmitted using the primary polarization.

[0279] In addition, when the virtual D layer or the virtual E layer is not used, there is no problem in ignoring the information on the transmission parameters of the unused layer in the broadcast receiving device 100. For example, it is configured so that, with respect to the virtual D layer or the virtual E layer, Figure 5J When the parameter of the additional layered transmission identifier of the TMCC information indicates "1" (indicating that the virtual D layer / virtual E layer is not used), regardless of the virtual D layer or virtual E layer that is not used Figure 6G The broadcast receiving device 100 may ignore any value stored in the transmission parameter shown.

[0280] Next, for Figure 6G The details of the additional information of the transmission parameters described in are described in detail.

[0281] exist Figure 6H A specific example of the transmission parameter additional information is shown in . The transmission parameter additional information may include parameters of an error correction method, parameters of a constellation format, and the like.

[0282] The error correction method indicates the encoding method used as the error correction method setting for inner encoding and outer encoding when transmitting 4K broadcast programs (advanced terrestrial digital broadcasting services) using B layer or C layer. Figure 6I An example of bit allocation for the error correction method is shown in [ ]. If this parameter is "000," convolutional coding is used as the inner coding and shortened RS coding is used as the outer coding when transmitting 4K broadcast programs using the B- or C-layer. If this parameter is "001," LDPC coding is used as the inner coding and BCH coding is used as the outer coding when transmitting 4K broadcast programs using the B- or C-layer. Other combinations can also be set and selected.

[0283] In addition, when transmitting 4K broadcast programs using Layer B or Layer C, not only uniform constellations but also non-uniform constellations (NUC) can be used as carrier modulation mapping methods. Figure 6JAn example of constellation bit allocation is shown in . When this parameter is "000," the carrier modulation mapping scheme selected by the transmission parameters of the TMCC information is applied according to a uniform constellation. When this parameter is a value between "001" and "111," the carrier modulation mapping scheme selected by the transmission parameters of the TMCC information is applied according to a non-uniform constellation. Furthermore, when a non-uniform constellation is applied, the optimal value for the non-uniform constellation varies depending on the type of error correction scheme and its coding rate. Therefore, when the constellation parameter is a value between "001" and "111," the broadcast receiving device 100 of this embodiment can determine the non-uniform constellation to be used in the demodulation process based on the parameters of the carrier modulation mapping scheme, the error correction scheme, and its coding rate. This determination can be made by the broadcast receiving device 100 referring to a pre-stored, predetermined table, or the like.

[0284] [Transmission method 1 for advanced terrestrial digital broadcasting services]

[0285] In order to maintain the audio-visual environment of the current terrestrial digital broadcasting service and realize 4K (horizontal 3840 pixels × vertical 2160 pixels) broadcasting at the same time, a polarization-based transmission method is described as an example of a transmission method for an advanced terrestrial digital broadcasting service according to an embodiment of the present invention. The polarization-based transmission method according to an embodiment of the present invention is a method that makes some specifications common with the current terrestrial digital broadcasting method. For example, 13 segments within a frequency band of approximately 6 MHz, which is equivalent to one physical channel, are divided, and 7 segments are allocated for transmitting 2K (horizontal 1920 pixels × vertical 1080 pixels) broadcast programs, 5 segments are allocated for transmitting 4K broadcast programs, and 1 segment is allocated for mobile reception (so-called single-segment broadcasting). Furthermore, the 5 segments used for 4K broadcasting use not only horizontally polarized wave signals but also vertically polarized wave signals, and MIMO (Multiple-Input Multiple-Output) technology is used to ensure the transmission capacity of a total of 10 segments. Furthermore, 2K broadcasts are optimized using the latest MPEG-2 Video compression technology to maintain image quality, enabling reception on existing TV receivers. 4K broadcasts are optimized using HEVC compression technology, which is more efficient than MPEG-2 Video, and multi-level modulation to ensure image quality. Furthermore, the number of segments allocated for each broadcast can be different from the above.

[0286] exist Figure 7AThe figure below illustrates an example of a dual-polarization transmission method for advanced terrestrial digital broadcasting services according to an embodiment of the present invention. The terrestrial digital broadcasting service uses a frequency band of 470 to 710 MHz for broadcast wave transmission. This frequency band contains 40 physical channels, ranging from 13 to 52 channels, each with a 6 MHz bandwidth. In the dual-polarization transmission method according to an embodiment of the present invention, both horizontally polarized and vertically polarized signals are used within a single physical channel.

[0287] exist Figure 7A In the example of allocation of 13 segments, two examples (1) and (2) are shown. In the example (1), segments 1 to 7 (B layer) of the horizontally polarized wave signal are used to transmit 2K broadcast programs. Segments 8 to 12 (C layer) of the horizontally polarized wave signal and segments 8 to 12 (C layer) of the vertically polarized wave signal, totaling 10 segments, are used to transmit 4K broadcast programs. Segments 1 to 7 (B layer) of the vertically polarized wave signal can also be used to transmit the same broadcast program as the 2K broadcast program transmitted using segments 1 to 7 (B layer) of the horizontally polarized wave signal. Alternatively, segments 1 to 7 (B layer) of the vertically polarized wave signal can be used to transmit a broadcast program different from the 2K broadcast program transmitted using segments 1 to 7 (B layer) of the horizontally polarized wave signal. Alternatively, segments 1 to 7 (B layer) of the vertically polarized wave signal can be used for other data transmission or not used. The identification information for segments 1 to 7 (B layer) of the vertically polarized wave signal can be transmitted to the receiving device using the parameters of the 4K signal transmission layer identifier and the parameters of the additional layer transmission identifier of the TMCC signal described above. The broadcast receiving device 100 can use these parameters to identify the processing of segments 1 to 7 (B layer) of the vertically polarized wave signal. Furthermore, 2K broadcast programs transmitted using the B layer of the horizontally polarized wave signal and 4K broadcast programs transmitted using the C layer of both horizontally and vertically polarized wave signals can be simultaneous broadcasts of the same content at different resolutions, or they can be broadcasts of different content. Segment 0 of both horizontally and vertically polarized wave signals transmits the same single-segment broadcast program.

[0288] Figure 7AExample (2) is a modified example different from (1). In example (2), 4K broadcast programs are transmitted using segments 1 to 5 (B layer) of the horizontally polarized wave signal and segments 1 to 5 (B layer) of the vertically polarized wave signal, totaling 10 segments. 2K broadcast programs are transmitted using segments 6 to 12 (C layer) of the horizontally polarized wave signal. In example (2), segments 6 to 12 (C layer) of the vertically polarized wave signal can also be used to transmit the same broadcast program as the 2K broadcast program transmitted using segments 6 to 12 (C layer) of the horizontally polarized wave signal. Segments 6 to 12 (C layer) of the vertically polarized wave signal can also be used to transmit a different broadcast program from the 2K broadcast program transmitted using segments 6 to 12 (C layer) of the horizontally polarized wave signal. In addition, segments 6 to 12 (C layer) of the vertically polarized wave signal can also be used for other data transmission or not be used. These identification information are the same as in example (1), so their further description is omitted.

[0289] in addition, Figure 7A Examples (1) and (2) both illustrate the case where the horizontal polarization wave is the main polarization wave, but depending on the application, the horizontal polarization wave and the vertical polarization wave may be opposite.

[0290] exist Figure 7B An example of the structure of a broadcasting system for an advanced terrestrial digital broadcasting service using a polarization-based transmission method according to an embodiment of the present invention is shown in FIG. A transmitter system and a receiver system for an advanced terrestrial digital broadcasting service using a polarization-based transmission method are shown together. The structure of a broadcasting system for an advanced terrestrial digital broadcasting service using a polarization-based transmission method is basically the same as that of FIG. Figure 1 The structure of the broadcasting system shown is the same, but the radio tower 300T as the equipment of the broadcasting station is a polarization wave common transmission antenna that can simultaneously transmit horizontally polarized wave signals and vertically polarized wave signals. Figure 7B In the example of FIG. 1 , only the channel selection / detection unit 131H and the channel selection / detection unit 131V of the second modem unit 130T are described in detail, and description of other operation portions is omitted.

[0291] The horizontally polarized wave signal transmitted from the radio tower 300T is received by the horizontally polarized wave receiving element of the polarization-sharing receiving antenna, namely antenna 200T, and is input to the tuning / detection unit 131H via the coaxial cable 202T1 through the connector 100F1. Meanwhile, the vertically polarized wave signal transmitted from the radio tower 300T is received by the vertically polarized wave receiving element of antenna 200T and is input to the tuning / detection unit 131V via the coaxial cable 202T2 through the connector 100F2. An F-type connector is generally used as the connector for connecting an antenna (coaxial cable) to a television receiver.

[0292] Here, there is also the possibility that the user mistakenly connects coaxial cable 202T1 to connector unit 100F2, and vice versa. In this case, there is the possibility that the channel selection / detection unit 131H and the channel selection / detection unit 131V may fail to recognize whether the input broadcast signal is a horizontally polarized wave signal or a vertically polarized wave signal. To prevent such a failure, it is possible to consider making one of the connectors connecting the antenna (coaxial cable) and the television receiver, for example, the connector portion between the coaxial cable 202T2 and the connector unit 100F2 that transmits the vertically polarized wave signal, a connector portion having a different shape from the F-type connector between the coaxial cable 202T1 and the connector unit 100F1 that transmits the horizontally polarized wave signal. Alternatively, the channel selection / detection unit 131H and the channel selection / detection unit 131V may each refer to the main signal identifier of the TMCC information of each input signal, thereby recognizing whether the input broadcast signal is a horizontally polarized wave signal or a vertically polarized wave signal and performing an operation.

[0293] exist Figure 7C FIG. 2 shows an example of a configuration of a broadcast system for an advanced terrestrial digital broadcast service using a polarization dual-mode transmission method according to an embodiment of the present invention, which is different from the above-described configuration. Figure 7B The structure shown in FIG. 100 in which the broadcast receiving device 100 has two connectors for inputting broadcast signals and two coaxial cables are used to connect the antenna 200T and the broadcast receiving device 100 is not necessarily preferable in terms of equipment cost and handling during cable wiring. Figure 7C In the illustrated configuration, the horizontally polarized wave signal received by the horizontally polarized wave receiving element of antenna 200T and the vertically polarized wave signal received by the vertically polarized wave receiving element of antenna 200T are input to a converter (converter) 201T. A single coaxial cable 202T3 connects converter 201T to broadcast receiving device 100. Broadcast signals input from connector 100F3 are demultiplexed and input to channel selection / detection sections 131H and 131V. Connector 100F3 may also function to supply operating power to converter 201T.

[0294] The converter 201T may also be a device in the environment (e.g., a housing complex) where the broadcast receiving device 100 is installed. Alternatively, it may be integrated with the antenna 200T and installed in the residence, etc. The converter 201T performs frequency conversion processing on either the horizontally polarized wave signal received by the horizontally polarized wave receiving element of the antenna 200T or the vertically polarized wave signal received by the vertically polarized wave receiving element of the antenna 200T. This processing separates the horizontally polarized wave signal and the vertically polarized wave signal, which use the same frequency band and are transmitted from the radio tower 300T to the antenna 200T, into different frequency bands, allowing them to be simultaneously transmitted to the broadcast receiving device 100 via a single coaxial cable 202T3. Furthermore, if desired, frequency conversion processing may be performed on both the horizontally polarized wave signal and the vertically polarized wave signal. In this case, the frequency bands of the two signals after frequency conversion also need to be different. Furthermore, the broadcast receiving device 100 only needs to include a single broadcast signal input connector 100F3.

[0295] exist Figure 7D An example of frequency conversion processing is shown in FIG. In this example, frequency conversion processing is performed on a vertically polarized wave signal. Specifically, the frequency band of the vertically polarized wave signal, of the horizontally polarized wave signal and the vertically polarized wave signal transmitted in the 470-710 MHz frequency band (equivalent to the 13-52 ch band of UHF), is converted from the 470-710 MHz frequency band to the 770-1010 MHz frequency band. This processing allows the horizontally polarized wave and the vertically polarized wave signals transmitted in the same frequency band to be simultaneously transmitted to the broadcast receiving device 100 using a single coaxial cable 202T3 without interfering with each other. Alternatively, frequency conversion processing can be performed on the horizontally polarized wave signal.

[0296] In addition, the frequency conversion process is preferably performed on the signal transmitted with the secondary polarization wave according to the result of referring to the main signal identifier of the TMCC information. Figure 5H As described above, signals transmitted using the main polarization are more likely to be transmitted, including existing terrestrial digital broadcasting services, than signals transmitted using the secondary polarization. Therefore, to better maintain compatibility with existing terrestrial digital broadcasting services, it is preferable to not perform frequency conversion on signals transmitted using the main polarization, but to perform frequency conversion on signals transmitted using the secondary polarization.

[0297] Furthermore, when frequency conversion is performed on a signal transmitted using a secondary polarization, it is preferable that the frequency band of the signal transmitted using the secondary polarization in the converted signal be higher than the frequency band of the signal transmitted using the primary polarization. Thus, during the initial scan of the broadcast receiving device 100, by scanning from a low frequency side toward a high frequency side, the initial scan can be performed on the signal transmitted using the primary polarization before the signal transmitted using the secondary polarization. This allows for more efficient processing, such as reflecting initial scan settings based on current terrestrial digital broadcasting services to initial scan settings based on advanced terrestrial digital broadcasting services.

[0298] Furthermore, the frequency conversion process may be performed on all physical channels used in the advanced terrestrial digital broadcasting service, or may be performed only on physical channels using signal transmission based on a polarization-based transmission method.

[0299] Furthermore, the frequency band converted by the frequency conversion process is preferably set to between 710 and 1032 MHz. Specifically, to simultaneously receive terrestrial digital broadcasting services and BS / CS digital broadcasting services, it is considered possible to mix the broadcast signal of the terrestrial digital broadcasting service received by antenna 200T with the broadcast signal of the BS / CS digital broadcasting service received by antenna 200B, and transmit the mixed signals to broadcast receiving device 100 via a single coaxial cable. In this case, since BS / CS-IF signals utilize a frequency band of approximately 1032 to 2150 MHz, setting the frequency band converted by the frequency conversion process to between 710 and 1032 MHz can prevent interference between horizontally polarized and vertically polarized signals, and also prevent interference between the broadcast signals of the terrestrial digital broadcasting service and the broadcast signals of the BS / CS digital broadcasting service. In addition, when considering receiving forwarded broadcast signals from cable TV (Community Antenna TV or Cable TV: CATV) stations, since cable TV stations use frequency bands below 770 MHz (equivalent to frequency bands below 62 channels of UHF) for television broadcasts, it is more preferable if the frequency band converted by frequency conversion processing is set to between 770 and 1032 MHz, which is higher than the frequency band equivalent to 62 channels of UHF.

[0300] Furthermore, the bandwidth of the region between the frequency band before and after frequency conversion (portion a in the figure) is preferably set to an integer multiple of the bandwidth of one physical channel (6 MHz). This provides advantages such as ease of frequency setting control when the broadcast receiving device 100 simultaneously performs frequency scanning on both the broadcast signal in the frequency band before and after frequency conversion.

[0301] In addition, as described above, in the dual-polarization transmission method of the embodiment of the present invention, both horizontally polarized wave signals and vertically polarized wave signals are used for the transmission of 4K broadcast programs. Therefore, in order to accurately reproduce 4K broadcast programs, it is necessary to accurately know the combination of the physical channels of the broadcast signal transmitted by the horizontal polarization wave and the broadcast signal transmitted by the vertical polarization wave at the receiving end. Even when frequency conversion processing is performed and the broadcast signal transmitted by the horizontal polarization wave and the broadcast signal transmitted by the vertical polarization wave on the same physical channel are input to the receiving device as signals of different frequency bands, the broadcast receiving device 100 of this embodiment can also refer to the physical channel combination of the horizontally polarized wave and the vertically polarized wave by the receiving end. Figures 5F to 5J By using the parameters of the TMCC information (e.g., main signal identifier and physical channel number identifier) ​​shown in FIG, the combination of horizontally polarized and vertically polarized broadcast signals transmitted on the same physical channel can be accurately determined. As a result, the broadcast receiving device 100 of this embodiment can appropriately receive, demodulate, and reproduce 4K broadcast programs.

[0302] in addition, Figure 7B 、 Figure 7C 、 Figure 7D The above examples all describe the case where the horizontal polarization wave is the main polarization wave. However, depending on the application, the horizontal polarization wave and the vertical polarization wave may be opposite to each other.

[0303] Furthermore, the terrestrial digital broadcast waves transmitted using the polarization dual transmission method described above can be received and reproduced by the second modem 130T of the broadcast receiving device 100, as described above, but can also be received by the first modem 130C of the broadcast receiving device 100. When the terrestrial digital broadcast waves are received by the first modem 130C, the broadcast signals transmitted using the advanced terrestrial digital broadcast service layer of the terrestrial digital broadcast waves are ignored, while the broadcast signals transmitted using the current terrestrial digital broadcast service layer are reproduced.

[0304] <Direct transmission method for advanced terrestrial digital broadcasting services>

[0305] The broadcast receiving device 100 can receive signals transmitted using the direct transmission method. The direct transmission method is a method in which a cable TV station or the like transmits a received broadcast signal to a CATV distribution system while maintaining the original signal format and transmitting the signal at the same frequency or after frequency conversion.

[0306] The direct-through method includes (1) extracting the transmission signal frequency band of each terrestrial digital broadcast signal output by the terrestrial wave receiving antenna, adjusting its level, and transmitting it to the CATV facility at the same frequency as the transmission signal frequency, and (2) extracting the transmission signal frequency band of each terrestrial digital broadcast signal output by the terrestrial wave receiving antenna, adjusting its level, and transmitting it to the CATV facility at a frequency set by the CATV facility manager in the VHF band, MID band, SHB band, or UHF band. The device constituting the receiving amplifier for signal processing in the first method or the device constituting the receiving amplifier and frequency converter for signal processing in the second method is an OFDM signal processor (OFDM Signal Processor: OFDM-SP).

[0307] exist Figure 7E , an example of a system configuration in which the first method of direct transmission is applied to an advanced terrestrial digital broadcasting service using a polarization dual transmission method is shown. Figure 7E FIG shows a head-end device 400C of a cable TV station and a broadcast receiving device 100. Figure 7F An example of the frequency conversion process at this time is shown. Figure 7F The (H·V) mark in the figure indicates that both the horizontally polarized wave and the vertically polarized wave are present in the same frequency band. The (H) mark indicates the horizontally polarized wave, and the (V) mark indicates the vertically polarized wave. Figure 7H 、 Figure 7I The symbols in have the same meaning.

[0308] In the case of applying the direct transmission of the first method described above to the advanced terrestrial digital broadcasting service of the polarization dual-use transmission method of the embodiment of the present invention, for the broadcast signal transmitted by the horizontal polarization wave, the cable TV station head-end equipment 400C performs signal band extraction and level adjustment, and transmits it at the same frequency as the transmission signal frequency. On the other hand, for the broadcast signal transmitted by the vertical polarization wave, the cable TV station head-end equipment 400C performs signal band extraction and level adjustment, and transmits it at the same frequency as the transmission signal frequency. Figure 7DThe same frequency conversion processing as described in the description (the processing of converting the broadcast signal transmitted by the vertically polarized wave into a frequency band higher than the frequency band of 13ch to 62ch equivalent to UHF, that is, the frequency band of 470 to 770MHz) is sent. Through this processing, the frequency bands of the broadcast signal transmitted by the horizontally polarized wave and the broadcast signal transmitted by the vertically polarized wave no longer overlap, so the signal can be transmitted using a single coaxial cable (or optical fiber cable). The transmitted signal can be received by the broadcast receiving device 100 of this embodiment. The processing of receiving and demodulating the broadcast signal transmitted by the horizontally polarized wave and the broadcast signal transmitted by the vertically polarized wave included in the signal in the broadcast receiving device 100 of this embodiment is the same as that in the embodiment. Figure 7D The description is the same, so it is omitted.

[0309] exist Figure 7G , an example of a system configuration in which the second method of direct transmission is applied to an advanced terrestrial digital broadcasting service using a polarization dual transmission method is shown. Figure 7G FIG shows a head-end device 400C of a cable TV station and a broadcast receiving device 100. Figure 7H An example of the frequency conversion process at this time is shown.

[0310] In the case of applying the direct transmission of the second method described above to the advanced terrestrial digital broadcasting service of the polarization-dual transmission method of the embodiment of the present invention, for the broadcast signal transmitted by the horizontal polarization wave, the cable TV station's head-end equipment 400C performs signal band extraction and level adjustment, and transmits after performing frequency conversion processing to the frequency set by the CATV facility manager. On the other hand, for the broadcast signal transmitted by the vertical polarization wave, the cable TV station's head-end equipment 400C performs signal band extraction and level adjustment, and transmits after performing frequency conversion processing to the frequency set by the CATV facility manager. Figure 7D The same frequency conversion processing as described above is performed (a process of converting a broadcast signal transmitted using a vertically polarized wave into a frequency band higher than the frequency band of 13ch to 62ch equivalent to UHF, that is, the frequency band of 470 to 770 MHz) and then transmitted. Figure 7H The frequency conversion process shown is the same as Figure 7FDifferently, the broadcast signal transmitted by horizontally polarized waves is not retained in the UHF frequency band of 13ch to 62ch, that is, the frequency band of 470 to 770 MHz, but the range is expanded to a lower frequency band and reconfigured in the range of 90 to 770 MHz. Through this processing, the frequency bands of the broadcast signal transmitted by horizontally polarized waves and the broadcast signal transmitted by vertically polarized waves no longer overlap, so the signal can be transmitted using a single coaxial cable (or optical fiber cable). The transmitted signal can be received by the broadcast receiving device 100 of this embodiment. The processing of receiving and demodulating the broadcast signal transmitted by horizontally polarized waves and the broadcast signal transmitted by vertically polarized waves included in the signal in the broadcast receiving device 100 of this embodiment is the same as that in the embodiment. Figure 7D The description is the same, so it is omitted.

[0311] In addition, as Figure 7G Another variation of the frequency conversion process of the cable TV headend device 400C in the embodiment of the present invention can also be to convert the broadcast signal after the frequency conversion into a direct output signal. Figure 7H Change to Figure 7I In this case, both the horizontally polarized and vertically polarized broadcast signals are subjected to signal band extraction and level adjustment, and are then transmitted after frequency conversion to the frequency set by the CATV facility manager. Figure 7I In the example, for both the horizontally polarized wave broadcast signal and the vertically polarized wave broadcast signal, the frequency conversion is performed in a manner of reconfiguration in the range of 90 to 770 MHz (from VHF 1ch to UHF 62ch), and the frequency band exceeding the UHF 62ch range is not used, so the frequency band utilization efficiency of the broadcast signal is better than that of the vertically polarized wave. Figure 7H higher.

[0312] In addition, compared with the UHF 13ch~52ch band (470~710MHz) when receiving with an antenna, the reconfigured broadcast signal band is wider, so Figure 7I As shown in the example of , it is possible to alternately reconfigure the broadcast signal transmitted with the horizontal polarization wave and the broadcast signal transmitted with the vertical polarization wave. Figure 7I As shown in the example, if the paired broadcast signals transmitted using horizontal polarization waves and the broadcast signals transmitted using vertical polarization waves, which are the same physical channel when received by the antenna, are alternately reconfigured according to the order of the physical channels when received by the antenna, then when the broadcast receiving device 100 of this embodiment performs the initial scan from the low frequency side, the paired broadcast signals transmitted using horizontal polarization waves and the broadcast signals transmitted using vertical polarization waves, which are originally the same physical channel, can be initialized in sequence in units of the same physical channel, and the initial scan can be performed efficiently.

[0313] in addition, Figure 7E 、 Figure 7F 、 Figure 7G 、 Figure 7H and Figure 7I The above examples all describe the case where the horizontal polarization wave is the main polarization wave. However, depending on the application, the horizontal polarization wave and the vertical polarization wave may be opposite to each other.

[0314] Furthermore, the terrestrial digital broadcast waves using the polarization-dual transmission method employing the direct transmission method described above can be received and reproduced by the second modem 130T of the broadcast receiving device 100, as described above, but can also be received by the first modem 130C of the broadcast receiving device 100. When the terrestrial digital broadcast waves are received by the first modem 130C, the broadcast signals transmitted using the advanced terrestrial digital broadcast service layer are ignored, while the broadcast signals transmitted using the current terrestrial digital broadcast service layer are reproduced.

[0315] [Transmission method 2 for advanced terrestrial digital broadcasting services]

[0316] In order to maintain the audio-visual environment of the current terrestrial digital broadcasting service while realizing 4K broadcasting, a layered multiplexing transmission method is described as an example of a transmission method of an advanced terrestrial digital broadcasting service according to an embodiment of the present invention that is different from the above. The layered multiplexing transmission method according to the embodiment of the present invention is a method that makes some specifications common with the current terrestrial digital broadcasting method. For example, the broadcast wave of the 4K broadcasting service with a low transmission signal level is multiplexed in the same channel as the broadcast wave of the current 2K broadcasting service. In addition, for 2K broadcasting, the reception level of the 4K broadcasting is suppressed to below the necessary C / N, and the same reception as before is performed. For 4K broadcasting, the transmission capacity is expanded by multi-value modulation, etc., and at the same time, a reception technology that supports LDM (layered multiplexing) technology is used to offset the 2K broadcasting wave and receive the remaining 4K broadcasting wave.

[0317] exist Figure 8A An example of a layer-division multiplexing transmission method in an advanced terrestrial digital broadcasting service according to an embodiment of the present invention is shown in FIG. The upper layer is composed of a modulated wave of the current 2K broadcast, and the lower layer is composed of a modulated wave of the 4K broadcast. These upper and lower layers are multiplexed and output as a composite wave. For example, a structure using 64QAM or the like as a modulation method in the upper layer and 256QAM or the like as a modulation method in the lower layer may be adopted. Furthermore, the 2K broadcast program transmitted in the upper layer and the 4K broadcast program transmitted in the lower layer may be simultaneous broadcasts of broadcast programs with the same content at different resolutions, or they may be broadcast programs with different contents.

[0318] exist Figure 8BAn example of the structure of a broadcasting system for an advanced terrestrial digital broadcasting service using the layered multiplexing transmission method according to an embodiment of the present invention is shown in FIG. The structure of the broadcasting system for an advanced terrestrial digital broadcasting service using the layered multiplexing transmission method is basically the same as that of FIG. Figure 1 The structure of the broadcasting system shown is the same, but the radio tower 300L as the equipment of the broadcasting station is a transmission antenna that transmits the broadcast signal that multiplexes the upper 2K broadcast and the lower 4K broadcast. Figure 8B In the example of FIG. 1 , only the channel selection / detection unit 131L of the third modem unit 130L is described in detail for the broadcast receiving apparatus 100 , and description of other operation portions is omitted.

[0319] The broadcast signal received by the antenna 200L is input to the channel selection / detection unit 131L from the connector 100F4 via the conversion unit (converter) 201L and the coaxial cable 202L. Here, with the above configuration, when the broadcast signal is transmitted from the antenna 200L to the broadcast receiving device 100, as shown in FIG. Figure 8C As shown, the converter 201L may also perform frequency conversion and amplification processing on the broadcast signal. Specifically, if the antenna 200L is installed on the roof of an apartment building or the like, and the broadcast signal is transmitted to the broadcast receiving device 100 in each room using a long coaxial cable 202L, the broadcast signal may be attenuated, and there is a possibility that the channel selection / detection unit 131L may fail to accurately receive 4K broadcast waves, particularly those on the lower floors.

[0320] Therefore, in order to prevent the above-mentioned failure, the conversion unit 201L performs frequency conversion and amplification processing on the lower-layer 4K broadcast signal. The frequency conversion and amplification processing converts the frequency band of the lower-layer 4K broadcast signal from the 470-710 MHz band (equivalent to the 13ch-52ch band of UHF) to the 770-1010 MHz band that exceeds the 62ch band of UHF, for example. Furthermore, the lower-layer 4K broadcast signal is amplified to a signal level to which the influence of attenuation in the cable is not a problem. By performing such processing, interference between the 2K broadcast signal and the 4K broadcast signal can be avoided, and the influence of attenuation of the broadcast signal in the coaxial cable transmission can also be avoided. In addition, when the cable length of the coaxial cable 202L is short, and the influence of attenuation is not a problem, the conversion unit 201L and the frequency conversion and amplification processing may not be required.

[0321] In addition, the frequency band after the conversion by the frequency conversion and amplification processing is preferably set to between 710 and 1032 MHz, which is a frequency band equivalent to 52 channels of UHF, or between 770 and 1032 MHz, which is a frequency band equivalent to 62 channels of UHF (in the case of forwarding by a cable TV station, etc.), and the bandwidth of the area between the frequency band before the conversion by the frequency conversion and the frequency band after the conversion by the frequency conversion and amplification processing is preferably set to an integer multiple of the bandwidth of one physical channel (6 MHz). The frequency conversion and amplification processing can be performed only on the physical channel for signal transmission based on the layer division multiplexing transmission method, etc. These are the same as the description of this embodiment of frequency conversion already described, so the description is omitted.

[0322] In addition, the broadcast receiving apparatus 100 of this embodiment can be used Figure 5H The upper and lower layer identifier bits of the TMCC information described in the embodiment identify whether the received broadcast signal is a broadcast signal transmitted using the lower layer or a broadcast signal transmitted using the upper layer. Figure 5F The frequency conversion processing identifier bit of the TMCC information described in the embodiment identifies whether the received broadcast signal is a broadcast signal that has undergone frequency conversion after being received by the antenna. Figure 5I The 4K signal transmission layer identifier bits in the TMCC information described above identify whether the received broadcast signal is transmitting a 4K program in the lower layer. While this identification process can be performed by demodulating the data carrier and referencing the control information included in the stream, it does require data carrier demodulation, which complicates the process. Using the parameters in the TMCC information for identification simplifies and speeds up the process, enabling, for example, faster initial scans of the broadcast receiving device 100.

[0323] In addition, the third modem unit 130L of the broadcast receiving device 100 of the embodiment of the present invention has a channel selection / detection unit 131L that supports the LDM (layer division multiplexing) technology, as described above. Therefore, there is no need for a channel between the antenna 200L and the broadcast receiving device 100. Figure 8C The transformation unit 201L is shown.

[0324] Furthermore, the terrestrial digital broadcast waves transmitted using the layer division multiplexing transmission method described above can be received and reproduced by the third modem 130L of the broadcast receiving device 100, as described above, but can also be received by the first modem 130C of the broadcast receiving device 100. When the terrestrial digital broadcast waves are received by the first modem 130C, the broadcast signals of the terrestrial digital broadcast waves transmitted using the layer of the advanced terrestrial digital broadcast service are ignored, while the broadcast signals transmitted using the layer of the current terrestrial digital broadcast service are reproduced.

[0325] [MPEG-2 TS method]

[0326] The broadcasting system of this embodiment can support MPEG-2 TS used in current terrestrial digital broadcasting services as a media transmission method for transmitting image and sound data. Figure 4D (1) The OFDM transmission wave transmission method of the stream is MPEG-2 TS, Figure 4D (2) and Figure 4D In the OFDM transmission wave of (3), the method of transmitting the layer transmission stream of the current terrestrial digital broadcasting service is MPEG-2 TS. Figure 2A The format of the stream obtained by demodulating the transmission wave by the first modem unit 130C of the broadcast receiving device 100 is MPEG-2 TS. Furthermore, the format of the stream corresponding to the layer transmitting the current terrestrial digital broadcast service among the streams demodulated by the second modem unit 130T is MPEG-2 TS. Similarly, the format of the stream corresponding to the layer transmitting the current terrestrial digital broadcast service among the streams demodulated by the third modem unit 130L is MPEG-2 TS.

[0327] MPEG-2 TS is characterized by multiplexing program components, such as video and audio, along with control signals and a clock, into a single packet stream. Because it is processed as a single packet stream, including the clock, it is suitable for transmitting a single content using a single channel with guaranteed transmission quality, and is adopted by most current digital broadcasting systems. Furthermore, it enables bidirectional communication via fixed and mobile networks, supporting broadcast-communication collaboration systems that integrate digital broadcast services with broadband network functions, acquire additional content via broadband networks, perform computational processing in server devices, and perform presentation processing in collaboration with mobile devices.

[0328] exist Figure 9A An example of a protocol stack for transmission signals in a broadcasting system using MPEG-2 TS is shown in . In MPEG-2 TS, PSI, SI, and other control signals are transmitted in a section format.

[0329] [Control signals for broadcast systems using the MPEG-2 TS format]

[0330] The control information in the MPEG-2 TS format mainly includes tables used in program schedule information and tables used outside of program schedule information. Tables are transmitted in section format, and descriptors are placed in the tables.

[0331]

[0332] exist Figure 9BA list of tables used in the program schedule information of the MPEG-2 TS broadcasting system is shown in FIG. In this embodiment, the following tables are used as tables used in the program schedule information.

[0333] (1)PAT (Program Association Table)

[0334] (2)CAT (Conditional Access Table)

[0335] (3)PMT (Program Map Table)

[0336] (4)NIT (Network Information Table)

[0337] (5)SDT (Service Description Table)

[0338] (6)BAT (Bouquet Association Table)

[0339] (7)EIT (Event Information Table)

[0340] (8)RST (Running Status Table)

[0341] (9)TDT (Time and Date Table)

[0342] (10)TOT (Time Offset Table)

[0343] (11)LIT (Local Event Information Table)

[0344] (12)ERT (Event Relation Table)

[0345] (13)ITT(Index Transmission Table)

[0346] (14)PCAT(Partial Content Announcement Table)

[0347] (15)ST(Stuffing Table)

[0348] (16)BIT (Broadcaster Information Table)

[0349] (17)NBIT (Network Board Information Table)

[0350] (18)LDT(Linked Description Table)

[0351] (19) AMT (Address Map Table)

[0352] (20)INT(IP / MAC Notification Table)

[0353] (21) Table set by the operator

[0354] <Tables used in digital broadcasting>

[0355] exist Figure 9C 1 shows a list of tables used in addition to the program schedule information in the MPEG-2 TS broadcasting system. In this embodiment, the following tables are used as tables used in addition to the program schedule information.

[0356] (1)ECM (Entitlement Control Message)

[0357] (2)EMM (Entitlement Management Message)

[0358] (3)DCT (Download Control Table)

[0359] (4)DLT (Download Table)

[0360] (5)DIT (Discontinuity Information Table)

[0361] (6)SIT (Selection Information Table)

[0362] (7)SDTT(Software Download Trigger Table)

[0363] (8) CDT (Common Data Table)

[0364] (9)DSM-CC section

[0365] (10)AIT (Application Information Table)

[0366] (11)DCM (Download Control Message)

[0367] (12)DMM (Download Management Message)

[0368] (13) Table set by the operator

[0369] <Descriptors used in program lineup information>

[0370] exist Figure 9D and Figure 9E and Figure 9F A list of descriptors used in the program schedule information of the MPEG-2 TS broadcasting system is shown in FIG. In this embodiment, the following descriptors are used as descriptors used in the program schedule information.

[0371] (1) Conditional Access Descriptor

[0372] (2) Copyright Descriptor

[0373] (3) Network Name Descriptor

[0374] (4) Service List Descriptor

[0375] (5) Stuffing Descriptor

[0376] (6) Satellite Delivery System Descriptor

[0377] (7) Terrestrial Delivery System Descriptor

[0378] (8) Bouquet Name Descriptor

[0379] (9) Service Descriptor

[0380] (10) Country Availability Descriptor

[0381] (11) Linkage Descriptor

[0382] (12)NVOD Reference Descriptor

[0383] (13) Time Shifted Service Descriptor

[0384] (14) Short Event Descriptor

[0385] (15) Extended Event Descriptor

[0386] (16) Time Shifted Event Descriptor

[0387] (17) Component Descriptor

[0388] (18)Mosaic Descriptor

[0389] (19) Stream Identifier Descriptor

[0390] (20)CA Identifier Descriptor

[0391] (21) Content Descriptor

[0392] (22) Parental Rating Descriptor

[0393] (23) Hierarchical Transmission Descriptor

[0394] (24) Digital Copy Control Descriptor

[0395] (25) Emergency Information Descriptor

[0396] (26)Data Component Descriptor

[0397] (27) System Management Descriptor

[0398] (28) Local Time Offset Descriptor

[0399] (29) Audio Component Descriptor

[0400] (30) Target Region Descriptor

[0401] (31) Hyperlink Descriptor

[0402] (32)Data Content Descriptor

[0403] (33) Video Decode Control Descriptor

[0404] (34) Basic Local Event Descriptor

[0405] (35) Reference Descriptor

[0406] (36)Node Relation Descriptor

[0407] (37) Short Node Information Descriptor

[0408] (38) STC Reference Descriptor

[0409] (39) Partial Reception Descriptor

[0410] (40) Series Descriptor

[0411] (41) Event Group Descriptor

[0412] (42) SI Parameter Descriptor

[0413] (43) Broadcaster Name Descriptor

[0414] (44) Component Group Descriptor

[0415] (45) SI Prime TS Descriptor

[0416] (46) Board Information Descriptor

[0417] (47)LDT Linkage Descriptor

[0418] (48) Connected Transmission Descriptor

[0419] (49) TS Information Descriptor

[0420] (50) Extended Broadcaster Descriptor

[0421] (51) Logo Transmission Descriptor

[0422] (52) Content Availability Descriptor

[0423] (53)Carousel Compatible Composite Descriptor

[0424] (54) Conditional Playback Descriptor

[0425] (55)AVC Video Descriptor

[0426] (56)AVC Timing and HRD Descriptor

[0427] (57) Service Group Descriptor

[0428] (58)MPEG-4 Audio Descriptor

[0429] (59)MPEG-4 Audio Extension Descriptor

[0430] (60)Registration Descriptor

[0431] (61)Data Broadcast Id Descriptor

[0432] (62) Access Control Descriptor

[0433] (63) Area Broadcasting Information Descriptor

[0434] (64) Material Information Descriptor

[0435] (65) HEVC Video Descriptor

[0436] (66) Hierarchy Descriptor

[0437] (67) Hybrid Information Descriptor

[0438] (68) Scrambler Descriptor

[0439] (69) Descriptors set by the operator

[0440] <Descriptors used in digital broadcasting>

[0441] exist Figure 9GA list of descriptors used in addition to the program schedule information in the MPEG-2 TS broadcasting system is shown in FIG. In this embodiment, the following descriptors are used as descriptors used in addition to the program schedule information.

[0442] (1) Partial Transport Stream Descriptor

[0443] (2) Network Identification Descriptor

[0444] (3) Partial Transport Stream Time Descriptor

[0445] (4) Download Content Descriptor

[0446] (5)CA_EMM_TS_Descriptor (CA EMM TS Descriptor)

[0447] (6) CA Contract Information Descriptor

[0448] (7) CA Service Descriptor

[0449] (8) Carousel Identifier Descriptor

[0450] (9) Association Tag Descriptor

[0451] (10) Extended Association Tags Descriptor

[0452] (11) Network Download Content Descriptor

[0453] (12) Download Protection Descriptor

[0454] (13) CA Startup Descriptor

[0455] (14) Descriptors set by the operator

[0456] <Descriptors used in INT>

[0457] exist Figure 9H A list of descriptors used in the INT of an MPEG-2 TS broadcast system is shown in FIG. In this embodiment, the following descriptors are used as INT descriptors. Note that the descriptors used in the program schedule information and descriptors used outside the program schedule information are not used in the INT.

[0458] (1) Target Smartcard Descriptor

[0459] (2) Target IP Address Descriptor

[0460] (3) Target IPv6 Address Descriptor

[0461] (4) IP / MAC Platform Name Descriptor

[0462] (5) IP / MAC Platform Provider Name Descriptor

[0463] (6) IP / MAC Stream Location Descriptor

[0464] (7) Descriptors set by the operator

[0465] <Descriptors used in AIT>

[0466] exist Figure 9I A list of descriptors used in the AIT of an MPEG-2 TS broadcast system is shown in FIG. In this embodiment, the following descriptors are used as descriptors used in the AIT. The descriptors used in the aforementioned program schedule information and descriptors used outside the program schedule information are not used in the INT.

[0467] (1) Application Descriptor

[0468] (2) Transport Protocol Descriptor

[0469] (3) Simple Application Location Descriptor

[0470] (4) Application Boundary and Permission Descriptor

[0471] (5) Autostart Priority Descriptor

[0472] (6) Cache Control Info Descriptor

[0473] (7) Randomized Latency Descriptor

[0474] (8) External Application Control Descriptor

[0475] (9) Playback Application Descriptor

[0476] (10) Simple Playback Application Location Descriptor

[0477] (11) Application Expiration Descriptor

[0478] (12) Descriptors set by the operator

[0479] [MMT method]

[0480] The broadcast system of this embodiment can also support MMT as a media transmission method for transmitting image and sound data. Figure 4D (2) and Figure 4DIn principle, the format of the stream transmitted by the layer transmitting the advanced terrestrial digital broadcasting service in the OFDM transmission wave of (3) is the MMT format. In addition, in principle, the format of the stream corresponding to the layer transmitting the advanced terrestrial digital broadcasting service among the streams obtained by demodulating the transmission wave by the second modem unit 130T of the broadcast receiving device 100 of FIG. 2 is MMT. Similarly, in principle, the format of the stream corresponding to the layer transmitting the advanced terrestrial digital broadcasting service among the streams obtained by demodulating the transmission wave by the third modem unit 130L is MMT. In addition, as a modified example, an MPEG-2 TS stream may also be applied to the advanced terrestrial digital broadcasting service. In addition, the format of the stream obtained by demodulating the transmission wave by the fourth modem unit 130B is MMT.

[0481] The MMT method is a newly developed media transmission method because the MPEG-2 TS method has reached its limit in response to recent changes in the content distribution environment, such as the diversification of content, the diversification of devices that use content, the diversification of content distribution channels, and the diversification of content storage environments.

[0482] The video and audio signals of broadcast programs are encoded and converted into MFU (Media Fragment Unit) / MPU (Media Processing Unit), loaded into MMTP (MMT Protocol) payloads, and then packetized using MMTP for transmission using IP packets. Furthermore, data content and subtitle signals related to broadcast programs are also converted into MFU / MPU format, loaded into MMTP payloads, and packetized using MMTP for transmission using IP packets.

[0483] For the transmission of MMTP packets, UDP / IP (User Datagram Protocol / Internet Protocol) is used in the broadcast channel, and UDP / IP or TCP / IP (Transmission Control Protocol / Internet Protocol) is used in the communication line. In addition, TLV multiplexing can also be used in the broadcast channel to efficiently transmit IP packets.

[0484] exist Figure 10A The protocol stack of MMT in the broadcast channel is shown in FIG. Figure 10BThe MMT protocol stack in the communication line is shown in Figure 2. The MMT method provides a mechanism for transmitting two types of control information: MMT-SI and TLV-SI. MMT-SI is control information indicating the structure of broadcast programs, etc. It is converted to the format of MMT control messages, loaded into MMTP payloads, packetized, and transmitted using IP packets. TLV-SI is control information regarding the multiplexing of IP packets, providing information for channel selection and the correspondence between IP addresses and services.

[0485] [Control Signals for Broadcast Systems Using the MMT Method]

[0486] As mentioned above, the MMT format uses TLV-SI and MMT-SI as control information. TLV-SI consists of tables and descriptors. Tables are transmitted in section format, and descriptors are placed within tables. MMT-SI consists of three layers: messages that store tables and descriptors; tables with elements and attributes representing specific information; and descriptors that represent more detailed information.

[0487]

[0488] exist Figure 10C An overview of tables used in TLV-SI of the MMT broadcasting system is shown in FIG. In this embodiment, the following tables are used as TLV-SI tables.

[0489] (1) Network Information Table for TLV

[0490] (2) Address Map Table

[0491] (3) Table set by the operator

[0492] <Descriptors used in TLV-SI>

[0493] exist Figure 10D A list of descriptors used in TLV-SI of the MMT broadcasting system is shown in FIG. In this embodiment, the following descriptors are used as TLV-SI descriptors.

[0494] (1) Service List Descriptor

[0495] (2) Satellite Delivery System Descriptor

[0496] (3) System Management Descriptor

[0497] (4) Network Name Descriptor

[0498] (5) Remote Control Key Descriptor

[0499] (6) Descriptors set by the operator

[0500] <Messages used in MMT-SI>

[0501] exist Figure 10E A list of messages used in the MMT-SI of the MMT broadcasting system is shown in FIG. In this embodiment, the following messages are used as MMT-SI messages.

[0502] (1) PA (Package Access) message

[0503] (2) M2 section message

[0504] (3) CA message

[0505] (4)M2 short message

[0506] (5) Data transmission message

[0507] (6) Messages set by the operator

[0508] <Tables used in MMT-SI>

[0509] exist Figure 10F An overview of the tables used in the MMT-SI of the MMT broadcasting system is shown in FIG. In this embodiment, the following tables are used as the tables of the MMT-SI.

[0510] (1) MPT (MMT Package Table)

[0511] (2)PLT (Package List Table)

[0512] (3)LCT (Layout Configuration Table)

[0513] (4)ECM (Entitlement Control Message)

[0514] (5)EMM (Entitlement Management Message)

[0515] (6)CAT(MH)(Conditional Access Table(MH))

[0516] (7)DCM(Download Control Message)

[0517] (8)DMM(Download Management Message)

[0518] (9)MH-EIT(MH-Event Information Table)

[0519] (10)MH-AIT(MH-Application Information Table)

[0520] (11)MH-BIT(MH-Broadcaster Information Table)

[0521] (12)MH-SDTT(MH-Software Download Trigger Table)

[0522] (13)MH-SDT(MH-Service Description Table)

[0523] (14)MH-TOT(MH-Time Offset Table)

[0524] (15)MH-CDT (MH-Common Data Table)

[0525] (16)DDM table (Data Directory Management Table)

[0526] (17) DAM table (Data Asset Management Table)

[0527] (18) DCC table (Data Content Configuration Table)

[0528] (19) EMT (Event Message Table)

[0529] (20) User design table

[0530] <Descriptive marks used in MMT-SI>

[0531] present Figure 10G sum Figure 10Hand Figure 10I An overview of descriptors used in MMT-SI of the MMT broadcasting system is shown in FIG. In this embodiment, the following descriptors are used as MMT-SI descriptors.

[0532] (1) Asset Group Descriptor

[0533] (2) Event Package Descriptor

[0534] (3) Background Color Descriptor

[0535] (4)MPU Presentation Region Descriptor

[0536] (5)MPU Timestamp Descriptor

[0537] (6) Dependency Descriptor

[0538] (7) Access Control Descriptor

[0539] (8) Scrambler Descriptor

[0540] (9) Message Authentication Method Descriptor

[0541] (10) Emergency Information Descriptor

[0542] (11) MH-MPEG-4 Audio Descriptor

[0543] (12) MH-MPEG-4 Audio Extension Descriptor

[0544] (13) MH-HEVC Descriptor

[0545] (14)MH-Linkage Descriptor

[0546] (15) MH-Event Group Descriptor

[0547] (16) MH-Service List Descriptor

[0548] (17) MH-Short Event Descriptor

[0549] (18) MH-Extended Event Descriptor

[0550] (19) Video Component Descriptor

[0551] (20) MH-Stream Identifier Descriptor

[0552] (21) MH-Content Descriptor

[0553] (22) MH-Parental Rating Descriptor

[0554] (23) MH-Audio Component Descriptor

[0555] (24) MH-Target Region Descriptor

[0556] (25)MH-Series Descriptor

[0557] (26) MH-SI Parameter Descriptor

[0558] (27) MH-Broadcaster Name Descriptor

[0559] (28) MH-Service Descriptor

[0560] (29) IP Data Flow Descriptor

[0561] (30)MH-CA Startup Descriptor

[0562] (31) MH-Type Descriptor

[0563] (32)MH-Info Descriptor

[0564] (33)MH-Expire Descriptor

[0565] (34)MH-Compression Type Descriptor

[0566] (35) MH-Data Component Descriptor

[0567] (36)UTC-NPT Reference Descriptor

[0568] (37) Event Message Descriptor

[0569] (38) MH-Local Time Offset Descriptor

[0570] (39) MH-Component Group Descriptor

[0571] (40)MH-Logo Transmission Descriptor

[0572] (41)MPU Extended Timestamp Descriptor

[0573] (42)MPU Download Content Descriptor

[0574] (43) MH-Network Download Content Descriptor

[0575] (44) Application Descriptor (MH)

[0576] (45) MH-Transport Protocol Descriptor

[0577] (46) MH-Simple Application Location Descriptor

[0578] (47) Application Boundary and Permission Descriptor (MH)

[0579] (48) MH-Autostart Priority Descriptor

[0580] (49) MH-Cache Control Info Descriptor

[0581] (50) MH-Randomized Latency Descriptor

[0582] (51) Linked PU Descriptor

[0583] (52) Locked Cache Descriptor

[0584] (53) Unlocked Cache Descriptor

[0585] (54)MH-Download Protection Descriptor (MH-DL Protection Descriptor)

[0586] (55) Application Service Descriptor

[0587] (56)MPU Node Descriptor

[0588] (57)PU Structure Descriptor

[0589] (58)MH-Hierarchy Descriptor

[0590] (59) Content Copy Control Descriptor

[0591] (60) Content Usage Control Descriptor

[0592] (61) Emergency News Descriptor

[0593] (62)MH-CA Contract Info Descriptor

[0594] (63)MH-CA Service Descriptor

[0595] (64) MH-External Application Control Descriptor

[0596] (65) MH-Playback Application Descriptor

[0597] (66) MH-Simple Playback Application Location Descriptor

[0598] (67) MH-Application Expiration Descriptor

[0599] (68) Related Broadcaster Descriptor

[0600] (69) Multimedia Service Descriptor

[0601] (70) Descriptors set by the operator

[0602] <Relationship between data transmission and various control information in the MMT system>

[0603] exist Figure 10J The relationship between data transmission and representative tables in an MMT broadcasting system is shown in FIG.

[0604] In an MMT broadcasting system, data can be transmitted using multiple paths such as TLV streams via broadcast channels and IP data streams via communication lines. The TLV stream includes TLV-SIs such as TLV-NIT and AMT, and IP packet data streams, namely IP data streams. The IP data stream includes image resources including a series of image MPUs and sound resources including a series of sound MPUs. Furthermore, it may also include subtitle resources including a series of subtitle MPUs, overlay text resources including a series of overlay text MPUs, data resources including a series of data MPUs, and the like. These various resources are associated in packet units using the MPT (MMT packet table) stored and transmitted in the PA message. Specifically, the packet ID can be recorded in the MPT in association with the resource ID of each resource included in the packet.

[0605] The resources that make up the packet can be only the resources in the TLV stream, but can also be Figure 10J As shown, the resource includes the IP data stream transmitted by the communication line. This can be achieved by including the location information of each resource included in the packet in the MPT so that the broadcast receiving device 100 can know the reference target of each resource. As the location information of each resource, it is possible to specify:

[0606] (1) Data multiplexed in the same IP data stream as MPT

[0607] (2) Data multiplexed in IPv4 data streams

[0608] (3) Data multiplexed in IPv6 data streams

[0609] (4) Data multiplexed in the broadcast MPEG2-TS

[0610] (5) Data multiplexed in MPEG2-TS format within the IP data stream

[0611] (6) Data located at the specified URL

[0612] Various data transmitted using various transmission paths.

[0613] MMT broadcast systems further include the concept of events. Events are a concept representing programs, handled by the MH-EIT sent in the M2 section message. Specifically, the data included in the event packet descriptor stored in the MH-EIT, starting from the start time stored in the MH-EIT and lasting for a period equivalent to the duration, constitutes the data included in the event concept. The MH-EIT can be used in the broadcast receiving device 100 for various processes related to these event units (e.g., program guide generation, recording and viewing reservation control, and copyright management such as temporary storage).

[0614] [Channel Setting Process of Broadcast Receiving Device]

[0615] Initial Scan

[0616] In current terrestrial digital broadcasting, the network ID varies depending on the source, and information about other stations is generally not included in the NIT. Therefore, the broadcast receiving device 100 of the present invention, which is compatible with current terrestrial digital broadcasting, must be able to search (scan) all receivable channels at the receiving location for the terrestrial digital broadcasting (advanced terrestrial digital broadcasting, or terrestrial digital broadcasting that simultaneously transmits advanced terrestrial digital broadcasting and current terrestrial digital broadcasting using different layers) of the present invention and generate a service list (receivable frequency table) based on the service ID. Furthermore, in areas where the same network ID can be received on different physical channels via an MFN (Multi Frequency Network), it is sufficient to basically select a channel with a good reception C / N ratio or BER (Bit Error Rate) and store it in the service list.

[0617] Furthermore, when receiving advanced BS digital broadcasts or advanced CS digital broadcasts using the fourth modem 130B of the broadcast receiving device 100 according to an embodiment of the present invention, the broadcast receiving device 100 only needs to obtain and store the service list stored in the TLV-NIT, eliminating the need to generate a service list. Consequently, initial scanning and the subsequent rescanning described below are unnecessary for advanced BS digital broadcasts or advanced CS digital broadcasts received using the fourth modem 130B.

[0618] Scan again

[0619] The broadcast receiving device 100 of the embodiment of the present invention has a rescan function when a new station is launched, a new repeater station is installed, or the reception location of the television receiver is changed. If the set information is changed, the broadcast receiving device 100 can notify the user of the change.

[0620] <Operation examples for initial and rescanning>

[0621] exist Figure 11A FIG2 shows an example of an operation sequence for channel setting processing (initial / re-scanning) in the broadcast receiving device 100 according to an embodiment of the present invention. While this figure shows an example using MPEG-2 TS as the media transmission method, the same process is basically the same when using MMT.

[0622] In the channel setting process, first, the receiving function control unit 1102 sets the residential area (selects the area where the broadcast receiving device 100 is set) based on the user's instructions (S101). At this time, instead of the user's instructions, the residential area can be automatically set based on the installation location information of the broadcast receiving device 100 obtained by the prescribed process. As an example of the process of obtaining the installation location information, information can be obtained from the network connected to the LAN communication unit 121, or information about the installation location can be obtained from an external device connected to the digital I / F unit 125. Next, the initial value of the frequency range to be scanned is set, and the modem unit (described in this way when the first modem unit 130C, the second modem unit 130T, and the third modem unit 130L are not distinguished. The same applies hereinafter) is instructed to tune to the above-set frequency (S102).

[0623] The modem unit performs tuning based on the above instruction (S103). If the frequency is successfully locked to the above setting (S103: Yes), the process proceeds to S104. If the frequency is not successfully locked (S103: No), the process proceeds to S111. In S104, the C / N check is performed (S104). If the C / N is greater than the specified value (S104: Yes), the process proceeds to S105 to perform reception confirmation processing. If the C / N is not greater than the specified value (S104: No), the process proceeds to S111.

[0624] During the reception confirmation process, the reception function control unit 1102 first obtains the BER of the received broadcast wave (S105). Next, it obtains the NIT and compares it to confirm whether the NIT contains valid data (S106). If the NIT obtained in S106 is valid, the reception function control unit 1102 obtains information such as the transport stream ID and origin network ID from the NIT. Furthermore, it obtains distribution system information regarding the physical conditions of the broadcast channel corresponding to each transport stream ID / origin network ID from the terrestrial distribution system descriptor. Furthermore, it obtains a list of service IDs from the service list descriptor.

[0625] Next, the reception function control unit 1102 checks the service list stored in the receiving device to determine whether the transport stream ID obtained in the process of S106 has been obtained (S107). If the transport stream ID obtained in the process of S106 has not been obtained (S107: No), the various information obtained in the process of S106 is added to the service list in association with the transport stream ID (S108). If the transport stream ID obtained in the process of S106 has been obtained (S107: Yes), the BER obtained in the process of S105 is compared with the BER obtained when the transport stream ID listed in the service list is obtained (S109). If the BER obtained in the process of S105 is better (S109: Yes), the service list is updated with the various information obtained in the process of S106 (S110). If the BER obtained in the process of S105 is not better (S109: No), the various information obtained in the process of S106 is discarded.

[0626] Furthermore, during the service list generation (addition / update) process, the remote control button ID can be obtained from the TS information descriptor to associate the representative service of each transport stream with the remote control button. This process enables the single-touch channel selection described later.

[0627] Upon completion of the reception confirmation process, the reception function control unit 1102 checks whether the current frequency setting is the final value of the scanned frequency range (S111). If the current frequency setting is not the final value of the scanned frequency range (S111: No), the frequency value set in the modem unit is increased (S112), and the processes of S103 to S110 are repeated. If the current frequency setting is the final value of the scanned frequency range (S111: Yes), the process proceeds to S113.

[0628] In the process of S113, the service list generated (added / updated) by the above process is presented to the user as a result of the channel setting process (S113). Furthermore, if there is a duplication of remote control buttons, the user may be notified of this and prompted to change the remote control button settings (S114). The service list generated / updated by 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 device 100.

[0629] exist Figure 11B An example of the data structure of NIT is shown in FIG. In the figure, "transpotrt_stream_id" corresponds to the above-mentioned transport stream ID, and "original_network_id" corresponds to the original network ID. Figure 11CAn example of the data structure of the terrestrial distribution system descriptor is shown in FIG. The "guard_interval", "transmission_mode" and "frequency" in the figure correspond to the above-mentioned distribution system information. Figure 11D An example of the data structure of the service list descriptor is shown in FIG. The "service_id" in the figure corresponds to the above-mentioned service ID. Figure 11E An example of the data structure of the TS information descriptor is shown in . "remote_control_key_id" in the figure corresponds to the remote control key ID described above.

[0630] Furthermore, the broadcast receiving device 100 may be controlled to appropriately change the frequency range of the above scan according to the received broadcast service. For example, when the broadcast receiving device 100 receives broadcast waves of a current terrestrial digital broadcast service, the frequency range of 470 to 770 MHz (equivalent to physical channels 13 to 62) may be scanned. Specifically, the frequency range is controlled such that the initial value is set to 470 to 476 MHz (center frequency 473 MHz), the final value is set to 764 to 770 MHz (center frequency 767 MHz), and the frequency value is increased by +6 MHz in the process of S112.

[0631] In addition, when the broadcast receiving apparatus 100 receives broadcast waves including advanced terrestrial digital broadcasting services, it is controlled to scan the frequency range of 470 to 1010 MHz (because there is a Figure 7D The frequency conversion process shown and Figure 8C That is, the initial value of the above-mentioned frequency range is set to 470-476 MHz (center frequency 473 MHz), the final value of the frequency range is set to 1004-1010 MHz (center frequency 1007 MHz), and the frequency value is increased by +6 MHz in the process of S112. In addition, even when the broadcast receiving device 100 receives an advanced terrestrial digital broadcasting service, if it is determined that the above-mentioned frequency conversion processing and frequency conversion amplification processing are not performed, it is controlled to scan only the frequency range of 470-770 MHz. The selection control of the frequency range to be scanned can be performed by the broadcast receiving device 100 based on the system identifier and frequency conversion processing identifier of the TMCC information.

[0632] In addition, the broadcasting system of the embodiment of the present invention is, for example, Figure 7CIn the structure shown, when the broadcast receiving device 100 receives an advanced terrestrial digital broadcast service using a polarization wave dual-use transmission method, one of the channel selection / detection unit 131H and the channel selection / detection unit 131V may be used to scan the frequency range of 470 to 770 MHz, and the other may be used to scan the frequency range of 770 to 1010 MHz (in the case where frequency conversion processing is performed on the transmission wave in the polarization wave detected by the other channel selection / detection unit). If control is performed in this way based on the system identifier and the frequency conversion processing identifier of the TMCC information, scanning in unnecessary frequency ranges can be omitted, and the time required for channel setting can be reduced. Furthermore, in this case, both the channel selection / detection unit 131H and the channel selection / detection unit 131V may be used to perform the operation in parallel. Figure 11A The action sequence Figure 11A The frequency of the action sequence increases the cycle synchronization of S112. At this time, if the structure is Figure 11A By receiving a pair of horizontally polarized and vertically polarized signals transmitted on the same physical channel simultaneously during the frequency-increasing cycle in the sequence, control information within the packet stream of an advanced terrestrial digital service transmitted by these paired horizontally polarized and vertically polarized signals can be decoded and obtained during this cyclic processing. This allows for efficient scanning and service list generation, which is preferred.

[0633] Likewise, the broadcast receiving apparatus 100 is Figure 8B In the case of a so-called dual tuner configuration (e.g., a configuration including multiple third modems 130L) further comprising multiple modems (channel selection / detection units) in the illustrated configuration, when receiving advanced terrestrial digital broadcasting services using layer-division multiplexing transmission, one of the dual tuners can scan the 470-770 MHz frequency range, while the other can scan the 770-1010 MHz frequency range (after frequency conversion and amplification processing). This control can reduce the time required for frequency setting, similar to the above.

[0634] In addition, if Figure 8A 、 Figure 8B 、 Figure 8C As explained, Figure 8BIn the illustrated configuration, the terrestrial digital broadcast service transmitted by either the upper or lower layer is the current terrestrial digital broadcast service. Therefore, for example, within the frequency ranges of 470-770 MHz and 770-1010 MHz, the first modem 130C can scan the frequency range transmitting the current terrestrial digital broadcast service, while the third modem 130L can scan the other frequency range in parallel. This reduces the time required for channel setting, similar to the parallel scanning performed by the dual tuners of the third modem 130L described above. In either the frequency range of 470-770 MHz or the frequency range of 770-1010 MHz, whether the current terrestrial digital broadcasting service or the advanced terrestrial digital broadcasting service is transmitted can be determined by receiving two locations, for example, 470-476 MHz (center frequency 473 MHz) and 770-776 MHz (center frequency 773 MHz), in each frequency range before starting the initial scan / rescan action sequence, using the third modem 130L to obtain the TMCC information transmitted at each frequency, and identifying the information by referring to the parameters (for example, system identifier parameters) stored in the TMCC information.

[0635] In addition, in the advanced terrestrial digital broadcasting service of the polarization wave dual transmission method, for example, Figure 7A In the case of a 4K broadcast program in the C layer shown in the layered example (1), in general, in the case of a channel of a broadcast program that is transmitted using both a horizontally polarized wave signal and a vertically polarized wave signal, the same transmission ID is detected in the scanning of both the frequency range of 470 to 770 MHz and the frequency range of 770 to 1010 MHz, but it is recorded as one channel in the service list. In addition, in the case of a 2K broadcast program in the B layer as shown in the figure, when the same broadcast program is transmitted using the B layer of the horizontally polarized wave signal and the B layer of the vertically polarized wave signal, even if the same transmission ID is detected, it can be stored as one channel in the service list. That is, when the same broadcast program is transmitted in the same layer using different polarized waves, it is combined and identified as one channel, and is not identified as different channels. In this way, in the channel selection process using the service list, it is possible to avoid confusion among users caused by the presence of exactly the same broadcast programs on different channels.

[0636] In contrast, in advanced terrestrial digital broadcasting services using a dual-polarization transmission system, when different broadcast programs are transmitted using the horizontally polarized signal's B layer and the vertically polarized signal's B layer (when the vertically polarized signal's B layer is treated as a virtual D layer), these programs are stored as separate channels in the service list. Whether the same broadcast program is transmitted using the horizontally polarized signal's B layer and the vertically polarized signal's B layer is determined by the broadcast receiving device 100 by referencing the additional layer transmission identifier parameter in the TMCC information.

[0637] [Channel selection processing of broadcast receiving device]

[0638] The broadcast receiving device 100 of the embodiment of the present invention has functions such as single-touch channel selection with a single-touch button of a remote control, channel up / down channel selection with the channel up / down button of the remote control, and direct channel selection by directly entering a 3-digit number using the numeric keys of the remote control as program selection functions. These channel selection functions can be performed using the information stored in the service list generated in the above-mentioned initial scan / re-scan. In addition, after channel selection, the information of the selected channel (3-digit number for direct channel selection, sub-number, TS name, service name, logo, image resolution information (such as the difference between UHD, HD, and SD), whether the image resolution is up / down converted, the number of channels, whether the sound is downmixed, etc.) is displayed using a banner display or the like. In this way, the user can visually obtain the information of the channel after channel selection and can confirm whether the required channel has been successfully selected. The following describes an example of processing in each channel selection method.

[0639] <Example of single-touch channel selection>

[0640] (1) By pressing a single button on the remote control, select the service of "service_id" specified by "remote_control_key_id".

[0641] (2) Set the last mode to display the channel information after selecting the channel.

[0642] <Example of channel selection using up and down buttons>

[0643] (1) Press the channel up / down button on the remote control to select a channel in the 3-digit sequence for direct channel selection.

[0644] (1-1) If the Up button is pressed, the adjacent service with the 3-digit number above is selected. However, if the current 3-digit number is the maximum value in the service list, the service with the minimum number is selected.

[0645] (1-2) If the down button is pressed, the next adjacent service with the 3-digit number is selected. However, if the current 3-digit number is the minimum value in the service list, the service with the maximum number is selected.

[0646] (2) Set the last mode to display the channel information after selecting the channel.

[0647] <Example of direct channel selection>

[0648] (1) When direct channel selection is selected, the system will wait for the input of a 3-digit channel number.

[0649] (2-1) If the input of the three-digit number is not completed within the prescribed time (about 5 seconds), the system returns to the normal mode and displays the channel information of the currently selected service.

[0650] (2-2) When the input of the 3-digit number is completed, it is determined whether the channel exists in the service list of the receivable frequency table. If not, a message such as "This channel does not exist" is displayed.

[0651] (3) If a channel exists, the channel selection process is performed, the final mode is set, and the channel information after the channel selection is displayed.

[0652] Furthermore, the channel selection operation is performed based on the SI, and when it is determined that the broadcast is suspended, a message to that effect may be displayed to inform the user.

[0653] <Remote control for broadcast receiving equipment>

[0654] exist Figure 12A 1 shows an example of an external view of a remote controller for inputting operation instructions to the broadcast receiving apparatus 100 according to the embodiment of the present invention.

[0655] The remote control 180R has a power button 180R1 for turning the power of the broadcast receiving device 100 on / off (standby on / off), cursor buttons (up, down, left, right) 180R2 for moving the cursor up, down, left, and right, a decision button 180R3 for determining the item at the cursor position as a selected item, and a return button 180R4.

[0656] Furthermore, the remote control 180R includes a network switching button (Advanced Terrestrial Digital, Terrestrial Digital, Advanced BS, BS, CS) 180R5 for switching the broadcast network received by the broadcast receiving device 100. Furthermore, the remote control 180R includes single-touch buttons (1 to 12) 180R6 for single-touch channel selection, a channel up / down button 180R7 for channel up / down selection, and numeric keys for entering a three-digit number when directly selecting a channel. In the example shown in the figure, the numeric keys also function as single-touch buttons 180R6. When directly selecting a channel, a three-digit number can be entered by pressing single-touch buttons 180R6 after pressing direct button 180R8.

[0657] The remote controller 180R also includes an EPG button 180R9 for displaying a program guide and a menu button 180RA for displaying a system menu. The program guide and system menu can be operated in detail using the cursor button 180R2, the enter button 180R3, and the return button 180R4.

[0658] Furthermore, remote control 180R includes a d-button 180RB for data broadcast services and multimedia services, a collaboration button 180RC for displaying a list of broadcast and communication cooperative services and their corresponding applications, and color buttons (blue, red, green, and yellow) 180RD. Cursor buttons 180R2, an enter button 180R3, a return button 180R4, and color buttons 180RD allow for detailed operations within data broadcast services, multimedia services, and broadcast and communication cooperative services.

[0659] Furthermore, remote control 180R includes a video button 180RE for selecting a related video, a sound button 180RF for switching the audio ES or switching between two languages, and a subtitle button 180RG for switching subtitles on / off or switching subtitle languages. Furthermore, remote control 180R includes a volume button 180RH for increasing / decreasing the volume of the audio output, and a mute button 180RI for switching the audio output on / off.

[0660] <Example of network switching using advanced terrestrial digital keypad>

[0661] The remote controller 180R of the broadcast receiving device 100 according to an embodiment of the present invention includes "advanced terrestrial digital buttons," "terrestrial digital buttons," "advanced BS buttons," "BS buttons," and "CS buttons" as network switching buttons 180R5. Regarding the "advanced terrestrial digital buttons" and "terrestrial digital buttons," in the case of advanced terrestrial digital broadcasting services, such as simultaneous broadcasting of 4K and 2K programs on different layers, the 4K program can be prioritized when the "advanced terrestrial digital buttons" are pressed, while the 2K program can be prioritized when the "terrestrial digital buttons" are pressed. This control allows, for example, forcing the selection of a 2K program by pressing the "terrestrial digital buttons" when 4K broadcasts are available but there are many errors in the 4K transmission wave.

[0662] <Example of screen display when selecting a channel>

[0663] As described above, the broadcast receiving apparatus 100 according to the embodiment of the present invention has a function of displaying information of a selected channel using a banner display or the like when channel selection is performed by one-touch channel selection, channel up / down selection, direct channel selection, or the like.

[0664] exist Figure 12B , an example of a banner display when selecting a channel is shown. Banner display 192A1 is an example of a banner display that is displayed when a 2K broadcast program is selected. For example, the program name, the start time / end time of the program, the network type, the number of the direct channel selection button on the remote control, and the service logo and three-digit number may be displayed. In addition, banner display 192A2 is an example of a banner display that is displayed when a 4K broadcast program is selected. For example, in addition to the same information as the above-mentioned banner display 192A1, a mark symbolizing "advanced" is further displayed to indicate that the program being received is a 4K broadcast program. In addition, in the case where resolution conversion processing and downmixing processing are performed, a display indicating this message can also be performed. In the example of banner display 192A2, as an example, downconversion processing from UHD resolution to HD resolution and downmixing processing from 22.2ch to 5.1ch are displayed.

[0665] By performing these displays in the broadcast receiving device 100, when the same content is simultaneously broadcast as broadcast programs of different qualities such as a 2K broadcast program and a 4K broadcast program by simulcasting, the user can appropriately know which broadcast program is being displayed.

[0666] A system for providing advanced digital broadcast services that incorporates some or all of the functions of the embodiments of the present invention described above can provide a technology for transmitting and receiving advanced digital broadcast services that is more advanced and takes into account compatibility with existing digital broadcast services. In other words, it can provide a technology for better transmitting or receiving advanced digital broadcast services.

[0667] While the above describes examples of implementations of the present invention, the structures for implementing the technology of the present invention are not limited to the above examples, and various modifications are contemplated. For example, a portion of the structure of one embodiment can be replaced with the structure of another embodiment, or the structure of another embodiment can be added to the structure of one embodiment. All of these fall within the scope of the present invention. Furthermore, the numerical values ​​and messages shown in the text and figures are merely examples, and using different ones does not impair the effects of the present invention.

[0668] The functions of the present invention described above may be partially or entirely implemented in hardware, for example, by designing them into an integrated circuit. Alternatively, they may be implemented in software by interpreting and executing an operating program that implements the functions, etc., using a microprocessor unit or the like. A combination of hardware and software may also be used.

[0669] Furthermore, the software for controlling the broadcast receiving device 100 may be pre-stored in the ROM 103 and / or storage unit 110 of the broadcast receiving device 100 before shipment. Alternatively, the software may be obtained from another application server 500 on the Internet 200 via the LAN communication unit 121 after shipment. Alternatively, the software may be obtained from a memory card, optical disk, or the like via the expansion interface unit 124. Similarly, the software for controlling the portable information terminal 700 may be pre-stored in the ROM 703 and / or storage unit 710 of the portable information terminal 700 before shipment. Alternatively, the software may be obtained from another application server 500 on the Internet 200 via the LAN communication unit 721 or mobile phone network communication unit 722 after shipment. Alternatively, the software may be obtained from a memory card, optical disk, or the like via the expansion interface unit 724.

[0670] In addition, the control lines and information lines shown in the figure are those that are necessary for explanation, and do not necessarily show all the control lines and information lines on the product. In fact, it can be considered that almost all structures are connected to each other.

[0671] Description of Reference Numerals

[0672] 100: Broadcast receiving device, 101: Main control unit, 102: System bus, 103: ROM, 104: RAM, 110: Storage (accumulation) unit, 121: LAN communication unit, 124: Expansion interface unit, 125: Digital interface unit, 130C, 130T, 130L, 130B: Modem unit, 140S, 140U: Decoder unit, 180: Operation input unit, 191: Image selection unit, 192: Monitor unit, 193: Image output unit, 194: Sound selection unit, 195: Speaker unit, 196: Sound output unit, 180R: Remote control unit, 200, 200T, 200L, 200B: Antenna, 300, 300T, 300L: Radio tower, 400C: Head end of cable TV station, 400: Broadcasting station server, 500: Service operator server, 600: Mobile phone communication server, 600B; Base station, 700: Portable information terminal, 800: Internet, 800R: Router device.

Claims

1. A broadcast receiving device, characterized in that: include: a modulation and demodulation unit that receives a first transmission wave transmitted in the air in a first polarization direction and a second transmission wave transmitted in the air in a second polarization direction different from the first polarization direction, performs demodulation processing using the first transmission wave and the second transmission wave to generate a stream, and Control Department, The predetermined bandwidth of each of the first transmission wave and the second transmission wave is divided into a predetermined number of segments, The control unit, based on the identification information contained in the second transmission wave, identifies a segment group having the same segment number as a segment belonging to a specified layer transmitted by the first transmission wave in the first polarization direction, in the segment transmitted by the second transmission wave in the second polarization direction, as a layer different from the specified layer of the first transmission wave.

2. The broadcast receiving device according to claim 1, wherein: The identification information is stored in a carrier wave modulated in a modulation method different from that of a data carrier wave in the second transmission wave received by the modem unit.

3. A method for processing transmission waves in a digital broadcasting system, characterized in that: include: a transmitting step of transmitting a first transmission wave in a first polarization direction and transmitting a second transmission wave in a second polarization direction different from the first polarization direction in the digital broadcasting system; a receiving step of receiving the first transmission wave and the second transmission wave transmitted in the transmitting step; and a layer identifying step of identifying layers included in the first transmission wave and the second transmission wave received in the receiving step, The predetermined bandwidth of each of the first transmission wave and the second transmission wave is divided into a predetermined number of segments, Identification information is stored in the second transmission wave, and this identification information can identify the segment group in the segment transmitted by the second transmission wave in the second polarization direction, which has the same segment number as the segment belonging to the specified layer transmitted by the first transmission wave in the first polarization direction, as a layer different from the specified layer in the layer identification step.

4. The method for processing a transmission wave according to claim 3, wherein: The identification information is stored in a carrier wave modulated in a modulation method different from that of a data carrier wave among the plurality of different transmission waves.

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