Reception device and method for processing transmission wave

Abstract

The invention provides a receiving apparatus and a transmission wave processing method. A reception device for receiving a transmission wave according to the present invention comprises: a modulation / demodulation unit for receiving a plurality of different transmission waves transmitted over the air in a plurality of different polarization directions, and generating a stream by performing a demodulation process using a pair of transmission waves among the plurality of different transmission waves; and a control unit that controls the modulation / demodulation unit to modulate the plurality of different transmission waves on the basis of identification information included in the plurality of different transmission waves received by the modulation / demodulation unit. And identifying a transmission wave transmitted in a first polarization direction as a main polarization direction and a transmission wave transmitted in a second polarization direction as a sub-polarization direction different from the first polarization direction as the main polarization direction in the pair of the plurality of different transmission waves. Therefore, the advanced digital broadcast can be better transmitted or received.

Description

[0001] This application is a divisional application of the international application PCT / JP2019 / 018997, which entered the Chinese national phase on November 12, 2020, and has application number 201980031905.6. Technical Field

[0002] This invention relates to broadcast transmission technology or broadcast reception technology. Background Technology

[0003] To replace existing analog broadcasting services, digital broadcasting services began to be implemented in various countries from the latter half of the 1990s. Digital broadcasting services have achieved improvements in broadcast quality through error correction technology, multi-channel and HD (High Definition) broadcasting through compression coding technology, and multimedia services using BML (Broadcast Markup Language) and HTML5 (Hypertext Markup Language version 5).

[0004] In recent years, in order to further improve frequency utilization efficiency, achieve higher resolution, and enhance functionality, research on advanced digital broadcasting methods has been conducted in various countries.

[0005] Existing technical documents

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2016-14420 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] Current digital broadcasting has been in service for over 10 years, and broadcast receiving devices capable of receiving current digital broadcasting services are widely available. Therefore, when initiating research into advanced digital broadcasting services, compatibility with existing digital broadcasting services must be considered. That is, it is preferable to maintain the existing audiovisual environment of digital broadcasting services while simultaneously achieving UHD (Ultra High Definition) resolution of video signals.

[0010] As a technology for implementing UHD broadcasting in digital broadcasting services, there is a system described in Patent Document 1. However, the system described in Patent Document 1 is a system for replacing existing digital broadcasting and does not take into account maintaining the audiovisual environment of existing digital broadcasting services.

[0011] The purpose of this invention is to provide a technology for an advanced digital broadcasting service that takes into account compatibility with existing digital broadcasting services and has better transmission or reception capabilities.

[0012] Technical solutions for solving the problem

[0013] As a technical solution to the above-mentioned problem, the technology described in the scope of the claimed claims is used.

[0014] For example, it can be configured to include: a tuner for receiving a transmitted wave, wherein the transmitted wave stores identification information in a carrier modulated with a modulation scheme different from that of a data carrier, which is capable of identifying the frequency band of the transmitted wave when it is transmitted in the air; and a control unit that uses the identification information contained in the transmitted wave received by the tuner to identify the frequency band of the transmitted wave when it is transmitted in the air.

[0015] Invention Effects

[0016] According to the present invention, a technology is provided that enables better transmission or reception of advanced digital broadcasting services. Attached Figure Description

[0017] Figure 1 This is a system structure diagram of a broadcasting system according to an embodiment of the present invention.

[0018] Figure 2A This is a block diagram of a broadcast receiving device according to an embodiment of the present invention.

[0019] Figure 2B This is a detailed block diagram of the first modulation and demodulation unit of a broadcast receiving apparatus according to an embodiment of the present invention.

[0020] Figure 2C This is a detailed block diagram of the second modulation and demodulation unit of a broadcast receiving apparatus according to an embodiment of the present invention.

[0021] Figure 2D This is a detailed block diagram of the third modulation and demodulation unit of a broadcast receiving apparatus according to an embodiment of the present invention.

[0022] Figure 2E This is a detailed block diagram of the fourth modulation and demodulation unit of a broadcast receiving apparatus according to an embodiment of the present invention.

[0023] Figure 2F This is a detailed block diagram of the first decoder section of a broadcast receiving apparatus according to an embodiment of the present invention.

[0024] Figure 2G This is a detailed block diagram of the second decoder section of a broadcast receiving apparatus according to an embodiment of the present invention.

[0025] Figure 2HThis is a software structure diagram of a broadcast receiving device according to an embodiment of the present invention.

[0026] Figure 3A This is a structural diagram of a broadcasting station server according to an embodiment of the present invention.

[0027] Figure 3B This is a structural diagram of a service operator server according to an embodiment of the present invention.

[0028] Figure 4A This is a diagram illustrating the segment structure of digital broadcasting according to an embodiment of the present invention.

[0029] Figure 4B This is a diagram illustrating the layering in layered transmission of digital broadcasting according to an embodiment of the present invention.

[0030] Figure 4C This diagram illustrates the generation process of OFDM transmission waves for digital broadcasting according to an embodiment of the present invention.

[0031] Figure 4D This is a diagram illustrating the basic structure of the channel coding unit of a digital broadcasting system according to an embodiment of the present invention.

[0032] Figure 4E This is a diagram illustrating the segment parameters of an OFDM mode for digital broadcasting according to an embodiment of the present invention.

[0033] Figure 4F This is a diagram illustrating the transmission signal parameters of a digital broadcast according to an embodiment of the present invention.

[0034] Figure 4G This is a diagram illustrating the configuration of the pilot signal in the synchronization modulation section of a digital broadcasting system according to an embodiment of the present invention.

[0035] Figure 4H This is a diagram illustrating the configuration of the pilot signal in the differential modulation section of a digital broadcasting system according to an embodiment of the present invention.

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

[0037] Figure 5B This is a diagram illustrating the bit allocation of TMCC information in digital broadcasting according to an embodiment of the present invention.

[0038] Figure 5C This is a diagram illustrating the transmission parameter information of TMCC information in digital broadcasting according to an embodiment of the present invention.

[0039] Figure 5D This is a diagram illustrating a system identifier for TMCC information in digital broadcasting according to an embodiment of the present invention.

[0040] Figure 5E This is a diagram illustrating the carrier modulation mapping method of TMCC information in digital broadcasting according to an embodiment of the present invention.

[0041] Figure 5F This is a diagram illustrating the frequency conversion processing identifier of TMCC information for digital broadcasting according to an embodiment of the present invention.

[0042] Figure 5G This is a diagram illustrating the physical channel number identifier of TMCC information for digital broadcasting according to an embodiment of the present invention.

[0043] Figure 5H This is a diagram illustrating an example of the main signal identifier for TMCC information in digital broadcasting according to an embodiment of the present invention.

[0044] Figure 5I This is a diagram illustrating a 4K signal transmission layer identifier for TMCC information in digital broadcasting according to an embodiment of the present invention.

[0045] 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.

[0046] Figure 6A This is a diagram illustrating the bit allocation of the AC signal in a digital broadcast system according to an embodiment of the present invention.

[0047] Figure 6B This is a diagram illustrating the structure identifier of an AC signal for digital broadcasting according to an embodiment of the present invention.

[0048] Figure 6C This is a diagram illustrating earthquake alarm information from an AC signal broadcast digitally according to an embodiment of the present invention.

[0049] Figure 6D This is a diagram illustrating the signal identifier of an earthquake alarm information signal in a digital broadcast AC signal according to an embodiment of the present invention.

[0050] Figure 6E This is a diagram illustrating earthquake alarm details of an AC signal broadcast digitally according to an embodiment of the present invention.

[0051] Figure 6F This is a diagram illustrating earthquake alarm details of an AC signal broadcast digitally according to an embodiment of the present invention.

[0052] Figure 6G This is a diagram illustrating additional information regarding the transmission control of the modulated wave in the AC signal of a digital broadcasting system according to an embodiment of the present invention.

[0053] Figure 6H This is a diagram illustrating additional information about the transmission parameters of the AC signal for digital broadcasting according to an embodiment of the present invention.

[0054] Figure 6I This is a diagram illustrating an error correction method for the AC signal of digital broadcasting according to an embodiment of the present invention.

[0055] 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.

[0056] Figure 7A This diagram illustrates a polarization-wave dual-purpose transmission method according to an embodiment of the present invention.

[0057] Figure 7B This is a system structure diagram of a broadcasting system using a polarization-wave dual-mode transmission method according to an embodiment of the present invention.

[0058] Figure 7C This is a system structure diagram of a broadcasting system using a polarization-wave dual-mode transmission method according to an embodiment of the present invention.

[0059] Figure 7D This is a diagram illustrating a frequency conversion process according to an embodiment of the present invention.

[0060] Figure 7E This is a diagram illustrating the structure of a direct transmission method according to an embodiment of the present invention.

[0061] Figure 7F This is a diagram illustrating the through transmission band of one embodiment of the present invention.

[0062] Figure 7G This is a diagram illustrating the structure of a direct transmission method according to an embodiment of the present invention.

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

[0064] Figure 7I This is a diagram illustrating the through transmission band of one embodiment of the present invention.

[0065] Figure 8A This diagram illustrates a layered multiplexing transmission method according to an embodiment of the present invention.

[0066] Figure 8B This is a system architecture diagram of a broadcast system using a layered multiplexing transmission method according to an embodiment of the present invention.

[0067] Figure 8C This is a diagram illustrating a frequency conversion amplification process according to an embodiment of the present invention.

[0068] Figure 9A This is a diagram illustrating the MPEG-2TS protocol stack.

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

[0070] Figure 9C This is a diagram illustrating the names and functions of the tables used in MPEG-2TS.

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

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

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

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

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

[0076] Figure 9I This is a diagram illustrating the names and functions of the descriptors used in MPEG-2TS.

[0077] Figure 10A This is a diagram illustrating the protocol stack in the broadcast channel of MMT.

[0078] Figure 10B This is a diagram illustrating the protocol stack in the communication line of an MMT (Multi-Media Platform).

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

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

[0081] Figure 10E This is a diagram illustrating the names and functions of the messages used in MMT-SI.

[0082] Figure 10F This is a diagram illustrating the names and functions of the tables used in MMT-SI.

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

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

[0085] Figure 10I This is a diagram illustrating the descriptors, names, and functions used in MMT-SI.

[0086] Figure 10J This is a diagram illustrating the relationship between data transmission in the MMT method and various tables.

[0087] Figure 11A This is an action sequence diagram of the channel setting process of a broadcast receiving device 100 according to an embodiment of the present invention.

[0088] Figure 11B It is a diagram illustrating the data structure of the network information table.

[0089] Figure 11C This is a diagram illustrating the data structure of the ground distribution system descriptor.

[0090] Figure 11D It is a diagram illustrating the data structure of the service list descriptor.

[0091] Figure 11E This is a diagram illustrating the data structure of the TS information descriptor.

[0092] Figure 12A This is an external view of a remote control according to an embodiment of the present invention.

[0093] Figure 12B This is a diagram illustrating the banner display during channel selection according to an embodiment of the present invention. Detailed Implementation

[0094] The following uses accompanying drawings to illustrate examples of embodiments of the present invention.

[0095] (Example 1)

[0096] [System Architecture]

[0097] Figure 1 This is a system architecture diagram illustrating an example of the structure of a broadcasting system.

[0098] The broadcasting system includes, for example, a broadcast receiving device 100 and an antenna 200, a radio tower 300 and a broadcasting station server 400, a service operator server 500, a mobile phone communication server 600 and a mobile phone communication network base station 600B, a portable information terminal 700, a broadband network such as the Internet 800, and a router device 800R. Furthermore, the Internet 800 can be further connected to various server devices and communication equipment.

[0099] The broadcast receiver 100 is a television receiver equipped with advanced digital broadcasting service reception capabilities. The broadcast receiver 100 may also further include reception capabilities for existing digital broadcasting services. Furthermore, it can cooperate with the broadband network functionality used in digital broadcasting services (existing or advanced digital broadcasting services), supporting broadcast communication cooperation systems that combine digital broadcasting services, such as obtaining additional content via broadband networks, processing computations on server devices, and providing prompts through cooperation with portable terminal devices. The broadcast receiver 100 receives digital broadcast waves transmitted from a radio tower 300 via antenna 200. These digital broadcast waves can be transmitted directly from the radio tower 300 to antenna 200, or via broadcast satellites or communication satellites (not shown). It can also receive broadcast signals relayed by cable television stations via cable lines. Additionally, the broadcast receiver 100 can connect to the Internet 800 via router device 800R, and can send and receive data by communicating with various server devices on the Internet 800.

[0100] Router device 800R is connected to the Internet 800 via wireless or wired communication, and to broadcast receiver 100 via wired communication and to portable information terminal 700 via wireless communication. Thus, the various server devices on the Internet 800, broadcast receiver 100, and portable information terminal 700 can send and receive data to each other via router device 800R. Router device 800R, broadcast receiver 100, and portable information terminal 700 form a LAN (Local Area Network). Alternatively, communication between broadcast receiver 100 and portable information terminal 700 can also be conducted directly using Bluetooth (registered trademark) or NFC (Near Field Communication) without going through router device 800R.

[0101] Radio tower 300 is the broadcasting equipment of the broadcasting station, transmitting digital broadcast waves containing various control information related to digital broadcasting services and content data of broadcast programs (moving image content and sound content, etc.). In addition, the broadcasting station has a broadcasting station server 400. The broadcasting station server 400 stores the content data of broadcast programs and metadata such as program titles, program IDs, program summaries, performers, and broadcast dates and times for each program. The broadcasting station server 400 provides the aforementioned content data and metadata to the service operator according to the contract. The provision of content data and metadata to the service operator is done through the API (Application Programming Interface) provided by the broadcasting station server 400.

[0102] Service operator server 500 is a server device prepared by the service operator to provide services based on the broadcast communication cooperation system. Service operator server 500 performs the storage, management, and distribution of content data and metadata provided from broadcast station server 400, as well as content data and applications (action programs and / or various data, etc.) created for the broadcast communication cooperation system. It also has the function of responding to inquiries from television receivers, retrieving and providing a list of available applications. Furthermore, the storage, management, and distribution of the aforementioned content data and metadata, as well as the storage, management, and distribution of the aforementioned 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. Alternatively, the functions of service operator server 500 can also be combined with those of broadcast station server 400.

[0103] The mobile phone communication server 600 is connected to the Internet 800, and on the other hand, it is connected to the portable information terminal 700 via base station 600B. The mobile phone communication server 600 manages the telephone communication (calls) and data transmission and reception conducted by the portable information terminal 700 via the mobile phone communication network, enabling the portable information terminal 700 to send and receive data with various server devices on the Internet 800 through communication. Furthermore, communication between the portable information terminal 700 and the broadcast receiving device 100 can also be conducted via base station 600B, mobile phone communication server 600, Internet 800, and router device 800R.

[0104] [Hardware structure of broadcast receiving device]

[0105] Figure 2A This is a block diagram illustrating an example of the internal structure of the broadcast receiving device 100.

[0106] 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, an audio selection unit 194, a speaker unit 195, and an audio output unit 196.

[0107] The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving device 100 according to a prescribed operating procedure. The system bus 102 is a communication path for transmitting and receiving data and commands between the main control unit 101 and the various operating modules within the broadcast receiving device 100.

[0108] ROM (Read Only Memory) 103 is a non-volatile memory that stores basic operating programs such as the operating system and other operating programs. For example, it may be a rewritable ROM such as EEPROM (Electrically Erasable Programmable ROM) or flash memory ROM. Additionally, ROM 103 stores operating settings required for the operation of the broadcast receiver 100. RAM (Random Access Memory) 104 is the working area for executing basic operating programs and other operating programs. ROM 103 and RAM 104 may also be integrated with the main control unit 101. Alternatively, ROM 103 may not be as... Figure 2A Instead of the independent structure shown, it uses a portion of the storage area within storage (accumulation) 110.

[0109] The storage (accumulation) unit 110 stores the operating program and operating settings of the broadcast receiver 100, as well as the personal information of the user of the broadcast receiver 100. It can also store operating programs downloaded via the Internet 800 and various data generated by these operating programs. Furthermore, it can store moving images, still images, and sounds obtained from broadcast waves or downloaded via the Internet 800. A portion of the storage (accumulation) unit 110 can replace all or part of the functions of the ROM 103. Additionally, the storage (accumulation) unit 110 needs to maintain the stored information even when the broadcast receiver 100 is not powered externally. Therefore, devices such as flash memory ROM, SSD (Solid State Drive), or HDD (Hard Disc Drive) disk drives can be used.

[0110] Furthermore, the aforementioned operation programs stored in ROM103 and storage (accumulation) unit 110 can be added, updated, and have their functions expanded through download processing from various server devices on Internet 800 and broadcast waves.

[0111] The LAN communication unit 121 connects 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. It also acquires the content data (or a portion thereof) of programs transmitted via the communication line. The connection to the router device 800R can be a wired connection or a wireless connection such as Wi-Fi. The LAN communication unit 121 includes encoding and decoding circuits. Furthermore, the broadcast receiver 100 may further include other communication units such as a Bluetooth communication unit, an NFC communication unit, or an infrared communication unit.

[0112] The first demodulation unit 130C, the second demodulation unit 130T, the third demodulation unit 130L, and the fourth demodulation unit 130B respectively receive broadcast waves from digital broadcast services and perform channel selection processing (channel selection) by tuning to the designated service channel based on the control of the main control unit 101. Furthermore, they perform demodulation processing and waveform shaping processing of the received signal's modulated wave, as well as frame structure and layer structure reconstruction processing, energy back-diffusion processing, error correction decoding processing, etc., to reproduce the packet stream. Additionally, they perform extraction of the transmission TMCC (Transmission Multiplexing Configuration Control) signal from the received signal and decoding processing.

[0113] Furthermore, the first modem 130C can input digital broadcast waves of the current terrestrial digital broadcasting service received by the current terrestrial digital broadcasting receiving antenna, i.e., antenna 200C. Additionally, the first modem 130C can also input broadcast signals of either the horizontal (H) polarized wave signal or the vertical (V) polarized wave signal of the dual-polarization terrestrial digital broadcasting service (described later), and demodulate layers using the same modulation scheme as the current terrestrial digital broadcasting service. Furthermore, the first modem 130C can also input broadcast signals of the layered multiplexing terrestrial digital broadcasting service (described later), and demodulate layers using the same modulation scheme as the current terrestrial digital broadcasting service. The second modem 130T inputs digital broadcast waves of the advanced terrestrial digital broadcasting service received by the dual-polarization terrestrial digital broadcasting receiving antenna, i.e., antenna 200T, via the conversion unit 201T. The third modem 130L inputs digital broadcast waves of the advanced terrestrial digital broadcasting service received by the layered multiplexing terrestrial digital broadcasting receiving antenna, i.e., antenna 200L, via the conversion unit 201L. The fourth modulation and demodulation unit 130B receives digital broadcast waves from the advanced BS (Broadcasting Satellite) digital broadcast service and the advanced CS (Communication Satellite) digital broadcast service via the BS / CS shared receiving antenna 200B through the conversion unit 201B.

[0114] The term "modulation and demodulation unit" refers to a component that has both tuner and demodulation functions.

[0115] Furthermore, antennas 200C, 200T, 200L, 200B, and converters 201T, 201L, and 201B do not constitute part of the broadcast receiving device 100, but belong to the equipment of the building or other structure where the broadcast receiving device 100 is installed.

[0116] In addition, the aforementioned existing terrestrial digital broadcasting is a broadcast signal for a terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically.

[0117] Furthermore, details regarding dual-polarization terrestrial digital broadcasting (an advanced terrestrial digital broadcasting system employing dual-polarization transmission) will be described later. It is a terrestrial digital broadcasting service capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically. Dual-polarization terrestrial digital broadcasting uses multiple polarization waves, including horizontal (H) polarization and vertical (V) polarization. By segmenting a portion of the polarized wave from both sides of these multiple polarization waves, it transmits images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically.

[0118] Furthermore, in the descriptions of the embodiments of the present invention, when the expression "multiple polarized waves" is used for dual-polarization terrestrial digital broadcasting, unless otherwise specified, it refers to both horizontal (H) polarized waves and vertical (V) polarized waves. Additionally, when only the expression "polarized wave" is used, it also refers to "polarized wave signal." Moreover, among one or both of the multiple polarized waves, a segment obtained from the polarization can be transmitted using the same modulation scheme as the aforementioned conventional terrestrial digital broadcasting that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically. That is, in dual-polarization terrestrial digital broadcasting, different segments of the multiple polarized waves in the embodiments of the present invention can be used to simultaneously transmit both the conventional 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 exceeding 1920 pixels horizontally × 1080 pixels vertically.

[0119] Furthermore, details regarding layered multiplexing terrestrial digital broadcasting (advanced terrestrial digital broadcasting employing layered multiplexing transmission) will be described later. It is a broadcast signal for a terrestrial digital broadcasting service capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically. Layered multiplexing terrestrial digital broadcasting multiplexes various digital broadcast signals with different signal levels. The layered multiplexing terrestrial digital broadcasting of the various embodiments of the present invention, as these various digital broadcast signals with different signal levels, enables the layered multiplexing of broadcast signals for existing terrestrial digital broadcasting services transmitting images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, and broadcast signals for terrestrial digital broadcasting services capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically, within the same physical channel's frequency band. That is, in the layered multiplexing terrestrial digital broadcasting of the various embodiments of the present invention, multiple layers with different signal levels can simultaneously transmit existing terrestrial digital broadcasting services that transmit images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically and terrestrial digital broadcasting services that can transmit images with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels vertically.

[0120] Furthermore, the broadcast receiving apparatus in the various embodiments of the present invention only needs to be capable of receiving advanced digital broadcasts effectively; it is not necessary to include all of the first modem 130C, the second modem 130T, the third modem 130L, and the fourth modem 130B. For example, at least one of the second modem 130T or the third modem 130L is sufficient. Additionally, to achieve more advanced functionality, one or more of the aforementioned four modems may be included in addition to the second modem 130T or the third modem 130L.

[0121] Furthermore, antennas 200C, 200T, and 200L can also be used interchangeably. Additionally, multiple modulation and demodulation units, including the first modulation and demodulation unit 130C, the second modulation and demodulation unit 130T, and the third modulation and demodulation unit 130L, can also be used interchangeably (or combined).

[0122] The first decoder unit 140S and the second decoder unit 140U respectively 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, 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 formats such as MPEG (Moving Picture Experts Group)-2TS (Transport Stream), MPEG-2PS (Program Stream), TLV (Type Length Value), and MMT (MPEG Media Transport).

[0123] The first decoder unit 140S and the second decoder unit 140U respectively perform Conditional Access (CA) processing, multiplexing and separation processing to extract image data, audio data, and various information data from the packet stream based on various control information included in the packet stream, decoding processing of image data and audio data, obtaining program information and generating EPG (Electronic Program Guide), and reproducing data broadcast images and multimedia data. Additionally, they perform processing to overlay the generated EPG or reproduced multimedia data with the decoded image data and audio data.

[0124] The image selection unit 191 receives image data output from the first decoder unit 140S and the second decoder unit 140U, and performs appropriate selection and / or overlay processing based on the control of the main control unit 101. Additionally, the image selection unit 191 performs appropriate scaling processing and OSD (On Screen Display) data overlay processing. The monitor unit 192 is a display device such as a liquid crystal panel, which displays the image data that has undergone selection and / or overlay processing by the image selection unit 191 and provides it to the user of the broadcast receiver 100. The image output unit 193 is an image output interface that outputs the image data that has undergone selection and / or overlay processing by the image selection unit 191 to an external device.

[0125] The sound selection unit 194 receives sound data output from the first decoder unit 140S and the second decoder unit 140U, and performs appropriate selection and / or mixing processing based on the control of the main control unit 101. The speaker unit 195 outputs the sound data that has undergone selection and / or mixing processing by the sound selection unit 194 and provides it to the user of the broadcast receiver 100. The sound output unit 196 is a sound output interface that outputs the sound data that has undergone selection and / or mixing processing by the sound selection unit 194 to external devices.

[0126] The digital interface unit 125 is an interface for outputting or inputting packet streams including encoded digital video data and / or digital audio data. The digital interface unit 125 can directly output packet streams input from the first demodulation unit 140S or the second demodulation unit 140U to the first modem 130C, the second modem 130T, the third modem 130L, and the fourth modem 130B. Alternatively, it can be controlled to input packet streams input from the outside via the digital interface unit 125 to the first decoder unit 140S or the second decoder unit 140U, or store them in the storage (accumulation) unit 110. Alternatively, it can output video data and audio data extracted by the first decoder unit 140S or the second decoder unit 140U. Alternatively, it can be controlled to input video data and audio data input from the outside via the digital interface unit 125 to the first decoder unit 140S or the second decoder unit 140U, or store them in the storage (accumulation) unit 110.

[0127] The expansion interface section 124 is an interface group used to expand the functions of the broadcast receiver 100, and consists of an analog video / audio interface, a USB (Universal Serial Bus) interface, a memory interface, etc. The analog video / audio interface receives analog video / audio signals from external video / audio output devices and outputs analog video / audio signals to external video / audio input devices. The USB interface connects to a PC or similar device for data transmission and reception. It can also connect to an HDD for recording broadcast programs or other content data. Additionally, it can connect to a keyboard or other USB devices. The memory interface connects to a memory card or other storage medium for data transmission and reception.

[0128] The operation input unit 180 is an instruction input unit for inputting operation instructions to the broadcast receiving device 100. It consists of a remote control receiver that receives commands sent from a remote controller (not shown) and operation buttons arranged in a push-button configuration. Only one of these components may be used. Alternatively, the operation input unit 180 may be replaced by a touch panel or similar device arranged overlapping the monitor unit 192. It may also be replaced by a keyboard or similar device connected to the expansion interface unit 124. The remote controller may be replaced by a portable information terminal 700 equipped with remote control command transmission capabilities.

[0129] Furthermore, if the broadcast receiver 100 is a television receiver or similar device, the image output unit 193 and the audio output unit 196 are not essential components. The broadcast receiver 100 can also be a DVD (Digital Versatile Disc) recorder, a HDD recorder, an STB (Set Top Box), or similar devices. It can also be a PC (Personal Computer) or a tablet computer with digital broadcast service reception capabilities. If the broadcast receiver 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 image output unit 193 and the audio output unit 196 or the digital interface unit 125, it can operate in the same way as a television receiver.

[0130] Figure 2B This is a block diagram showing an example of the detailed structure of the first modulation and demodulation unit 130C.

[0131] The selection / detection unit 131C receives the current digital broadcast wave received by the antenna 200C and performs channel selection based on the channel selection control signal. The TMCC decoding unit 132C extracts the TMCC signal from the output signal of the selection / detection unit 131C to obtain various TMCC information. The obtained TMCC information is used for control of various back-end processes. Details about the TMCC signal and TMCC information are described later.

[0132] The demodulation unit 133C, based on TMCC information, takes into account modulated waves modulated using methods such as QPSK (Quadrature Phase Shift Keying), DQPSK (Differential QPSK), 16QAM (Quadrature Amplitude Modulation), and 64QAM, and performs demodulation processing including frequency deinterleaving, time deinterleaving, and carrier demapping. The demodulation unit 133C can also further support modulation schemes different from the aforementioned modulation methods.

[0133] The stream playback unit 134C performs layered processing, Viterbi decoding and other internal coding error correction processing, energy backdiffusion processing, stream playback processing, RS (Reed Solomon) decoding and other external coding error correction processing. Alternatively, different error correction methods can be used. The packet stream reproduced and output by the stream playback unit 134C is, for example, MPEG-2TS. Other packet stream formats are also possible.

[0134] Figure 2C This is a block diagram showing an example of the detailed structure of the second modulation and demodulation unit 130T.

[0135] The selection / detection unit 131H receives a horizontal (H) polarized wave signal from the digital broadcast wave received by the antenna 200T and performs channel selection based on the channel selection control signal. The selection / detection unit 131V receives a vertical (V) polarized wave signal from the digital broadcast wave received by the antenna 200T and performs channel selection based on the channel selection control signal. Furthermore, the channel selection processing in the selection / detection unit 131H and the channel selection processing in the selection / detection unit 131V can be controlled in conjunction with each other or independently. That is, the selection / detection unit 131H and the selection / detection unit 131V can be treated as a single selection / detection unit to select one channel of the digital broadcast service using both horizontal and vertical polarization wave transmission, or they can be treated as two independent selection / detection units to select two different channels of the digital broadcast service using only horizontal (or vertical) polarization wave transmission.

[0136] Furthermore, 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 various embodiments of the present invention can be any polarized wave signal based on a broadcast wave whose polarization direction differs by approximately 90 degrees. Alternatively, the horizontal (H) polarized wave signal described below can be the opposite of the vertical (V) polarized wave signal and the structure regarding its reception.

[0137] The TMCC decoding unit 132H extracts the TMCC signal from the output signal of the station selection / detector unit 131H to obtain various TMCC information. The TMCC decoding unit 132V extracts the TMCC signal from the output signal of the station selection / detector unit 131V to obtain various TMCC information. Only one of the TMCC decoding units 132H and 132V may be used. The obtained TMCC information is used for control of various back-end processes.

[0138] Demodulation units 133H and 133V, based on TMCC information, take input modulated waves modulated using methods such as BPSK (Binary Phase Shift Keying), DBPSK (Differential Binary Phase Shift Keying), QPSK, DQPSK, 8PSK (Phase Shift Keying), 16APSK (Amplitude and Phase Shift Keying), 32APSK, 16QAM, 64QAM, 256QAM, and 1024QAM, and perform demodulation processing including frequency deinterleaving, time deinterleaving, and carrier demapping. Demodulation units 133H and 133V can also further support modulation schemes different from the aforementioned modulation methods.

[0139] The streaming unit 134H and streaming unit 134V perform internal coding error correction processes such as layering processing, Viterbi decoding or LDPC (Low Density Parity Check) decoding, energy backdiffusion processing, streaming reproduction processing, and external coding error correction processes such as RS decoding or BCH decoding. Alternatively, different error correction methods can be used. The packet stream reproduced and output by streaming unit 134H is, for example, MPEG-2 TS. The packet stream reproduced and output by streaming unit 134V is, for example, MPEG-2 TS or TLV including MMT packet streams. Other packet stream formats can also be used.

[0140] Figure 2D This is a block diagram showing an example of the detailed structure of the third modulation and demodulation unit 130L.

[0141] The selection / detection unit 131L receives a digital broadcast wave processed by Layered Division Multiplexing (LDM) from the antenna 200L and performs channel selection based on the channel selection control signal. In the LDM-processed digital broadcast wave, the upper layer (UL) modulated wave and the lower layer (LL) modulated wave can be used to transmit different digital broadcast services (or different channels of the same broadcast service). Furthermore, the upper layer modulated wave is output to the demodulation unit 133S, and the lower layer modulated wave is output to the demodulation unit 133L.

[0142] The TMCC decoding unit 132L receives the upper and lower modulation waves output from the selection / detection unit 131L, extracts the TMCC signal, and obtains various TMCC information. Alternatively, the signal input to the TMCC decoding unit 132L may consist of only either the upper or lower modulation wave.

[0143] Demodulation units 133S and 133L operate the same way as demodulation units 133H and 133V, so detailed descriptions are omitted. Similarly, stream reproduction units 134S and 134L operate the same way as stream reproduction units 134H and 134V, so detailed descriptions are omitted.

[0144] Figure 2E This is a block diagram showing an example of the detailed structure of the fourth modulation and demodulation unit 130B.

[0145] The selection / detection unit 131B receives digital broadcast waves from the Advanced BS Digital Broadcast Service and Advanced CS Digital Broadcast Service received by the antenna 200B, and performs channel selection based on the channel selection control signal. Other operations are the same as those of the selection / detection units 131H and 131V, so detailed descriptions are omitted. Furthermore, the TMCC decoding unit 132B, demodulation unit 133B, and stream reproduction unit 134B also perform the same operations as those of the TMCC decoding unit 132H, TMCC decoding unit 132V, demodulation unit 133H, demodulation unit 133V, and stream reproduction unit 134V, respectively, so detailed descriptions are omitted.

[0146] Figure 2F This is a block diagram illustrating an example of the detailed structure of the first decoder unit 140S.

[0147] Based on the control of the main control unit 101, the selection unit 141S selects one output from the packet stream input by the first modem 130C, the packet stream input by the second modem 130T, and the packet stream input by 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-2TS. The CA descrambler 142S performs decryption processing of the encryption algorithm using a specified scrambling method based on various control information regarding conditional reception superimposed on the packet stream.

[0148] The multiplexing and demultiplexing unit 143S is a stream decoder that separates and extracts image data, audio data, overlaid text data, subtitle data, and program information data based on various control information included in the input packet stream. The extracted image data is assigned to the image decoder 145S, the extracted audio data to the audio decoder 146S, and the extracted overlaid text data, subtitle data, and program information data to the data decoder 144S. The multiplexing and demultiplexing unit 143S can also accept packet streams (e.g., MPEG-2PS) obtained from a server device on the Internet 800 via the LAN communication unit 121. Furthermore, the multiplexing and demultiplexing unit 143S can output packet streams input from the first modem 130C, the second modem 130T, and the third modem 130L to the outside via the digital interface 125, and can also accept packet streams obtained from the outside via the digital interface 125.

[0149] The image decoder 145S performs decoding processing on the image data input from the multiplexing and demultiplexing unit 143S, including decoding of compressed image information, chroma conversion processing, and dynamic range conversion processing on the decoded image information. It also performs resolution conversion (up / down conversion) based on the control of the main control unit 101, outputting image data at appropriate 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). Image data can also be output at other resolutions. The audio decoder 146S performs decoding processing on compressed audio information. It also performs downmixing processing based on the control of the main control unit 101, outputting audio data with 22.2ch, 7.1ch, 5.1ch, or 2ch channels. Furthermore, multiple image decoders 145S and audio decoders 146S can be provided to perform decoding processing on multiple image and audio data simultaneously.

[0150] The data decoder 144S performs processing such as generating an EPG based on program information data, generating a data broadcast image based on BML data, and controlling a collaborative application based on broadcast communication collaboration functions. The data decoder 144S has a BML browser function that executes BML documents; the data broadcast image generation processing is performed by this BML browser function. Additionally, the data decoder 144S performs processing such as decoding overlaid text data to generate overlaid text information and decoding subtitle data to generate subtitle information.

[0151] Overlay units 147S, 148S, and 149S respectively perform overlay processing on image data output from image decoder 145S and EPG or data broadcast images output from data decoder 144S. Compositing unit 151S performs compositing processing on audio data output from audio decoder 146S and audio data reproduced by data decoder 144S. Selection unit 150S performs resolution selection on the image data based on the control of main control unit 101. Furthermore, the functions of overlay units 147S, 148S, 149S, and selection unit 150S can also be combined with image selection unit 191. The function of compositing unit 151S can also be combined with audio selection unit 194.

[0152] Figure 2G This is a block diagram illustrating an example of the detailed structure of the second decoder section 140U.

[0153] Based on the control of the main control unit 101, the selection unit 141U selects one output from the packet stream input by the second modem 130T, the packet stream input by the third modem 130L, and the packet stream input by the fourth modem 130B. The packet stream input from the second modem 130T, the third modem 130L, and the fourth modem 130B is, for example, an MMT packet stream or a TLV including an MMT packet stream. It can also be a packet stream in MPEG-2TS format using HEVC (High Efficiency Video Coding) or similar image compression methods. The CA descrambler 142U performs descrambling processing on the encryption algorithm of the specified scrambling method based on various control information regarding conditional access superimposed on the packet stream.

[0154] The multiplexing and demultiplexing unit 143U is a stream decoder that separates and extracts image data, audio data, overlaid text data, subtitle data, and program information data based on various control information included in the input packet stream. The extracted image data is allocated to the image decoder 145U, the extracted audio data to the audio decoder 146U, and the extracted overlaid text data, subtitle data, and program information data to the multimedia decoder 144U. The multiplexing and demultiplexing unit 143U can also input packet streams (e.g., MPEG-2PS or MMT packet streams) obtained from a server device on the Internet 800 via the LAN communication unit 121. Furthermore, the multiplexing and demultiplexing unit 143U can output packet streams input from the second modem 130T, the third modem 130L, and the fourth modem 130B to the outside via the digital interface 125, and can also input packet streams obtained from the outside via the digital interface 125.

[0155] The multimedia decoder 144U performs processing such as generating EPG based on program information data, generating multimedia images based on multimedia data, and controlling collaborative applications based on broadcast communication collaboration functions. The multimedia decoder 144U also has an HTML browser function that can execute HTML documents; the multimedia image generation processing is performed by this HTML browser function.

[0156] The image decoder 145U, the audio decoder 146U, the overlay unit 147U, the overlay unit 148U, the overlay unit 149U, the compositing unit 151U, and the selection unit 150U are constituent parts that respectively have the same functions as the image decoder 145S, the audio decoder 146S, the overlay unit 147S, the overlay unit 148S, the overlay unit 149S, the compositing unit 151S, and the selection unit 150S. As long as in Figure 2F In the descriptions of the image decoder 145S, the audio decoder 146S, the overlay unit 147S, the overlay unit 148S, the overlay unit 149S, the synthesis unit 151S, and the selection unit 150S, replacing the 'S' at the end of the symbols with 'U' results in... Figure 2G The descriptions of the image decoder 145U, the audio decoder 146U, the overlay unit 147U, the overlay unit 148U, the overlay unit 149U, the synthesis unit 151U, and the selection unit 150U are provided separately, so further detailed descriptions are omitted.

[0157] [Software Structure of Broadcast Receiver]

[0158] 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 receiving function program 1002, a browser program 1003, a content management program 1004, and other operation programs 1009. Furthermore, the storage (accumulation) unit 110 includes a content storage area 1011 for storing content data such as moving images, still images, and sound; an authentication information storage area 1012 for storing authentication information used during communication and cooperation with external portable terminal devices and server devices; and various information storage areas 1019 for storing other various types of information.

[0159] The basic operation program 1001 stored in the storage (accumulation) unit 110 is deployed to the RAM 104, and then the main control unit 101 executes the deployed basic operation program, thereby constituting the basic operation control unit 1101. Additionally, the receiving function program 1002, the browser program 1003, and the content management program 1004 stored in the storage (accumulation) unit 110 are respectively deployed to the RAM 104, and then the main control unit 101 executes each of the deployed operation programs, thereby constituting the receiving function control unit 1102, the browser engine 1103, and the content management unit 1104. Furthermore, the RAM 104 has a temporary storage area 1200 for temporarily storing data generated during the execution of each operation program as needed.

[0160] Furthermore, for the sake of simplicity, the following description will focus on the process by which the main control unit 101 controls each action module by deploying and executing the basic action program 1001 stored in the storage (accumulation) unit 110 to the RAM 104. The same description will be given for other action programs.

[0161] The receiving function control unit 1102 performs basic control of the broadcast receiving function and broadcast communication cooperation function of the broadcast receiving device 100. In particular, the station selection / demodulation unit 1102a mainly controls the channel selection processing, TMCC information acquisition processing, and demodulation processing in the first modem 130C, the second modem 130T, the third modem 130L, and the fourth modem 130B. The stream playback control unit 1102b mainly controls the layering processing, error correction decoding processing, energy backdiffusion processing, and stream playback processing in the first modem 130C, the second modem 130T, the third modem 130L, and the fourth modem 130B. The AV decoding unit 1102c mainly controls the multiplexing separation processing (stream decoding processing), video data decoding processing, and audio data decoding processing 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 processing, overlay text data decoding processing, subtitle data decoding processing, and control processing for communication and collaboration applications in the first decoder unit 140S; and the HTML data reproduction processing, multimedia image generation processing, and control processing for communication and collaboration applications in the second decoder unit 140H. The EPG generation unit 1102e primarily controls the EPG generation processing in the first decoder unit 140S and the second decoder unit 140H, and the display processing of the generated EPGs. The presentation processing unit 1102f controls the chroma conversion processing, dynamic range conversion processing, resolution conversion processing, and audio downmixing processing in the first decoder unit 140S and the second decoder unit 140H, as well as the image selection unit 191 and the audio selection unit 194.

[0162] The BML browser 1103a and HTML browser 1103b of the browser engine 1103 interpret the BML document and HTML document during the above BML data reproduction processing and HTML data reproduction processing, and perform data broadcast screen generation processing and multimedia screen generation processing.

[0163] Content Management Department 1104 performs the following: time planning management and execution control when making recording and audiovisual reservations for broadcast programs; copyright management when outputting broadcast programs and recorded programs from Digital I / F125 or LAN Communication Department 121; and validity period management of collaborative applications obtained based on broadcast communication collaboration functions.

[0164] The aforementioned operating procedures can be pre-stored in the storage (accumulation) unit 110 and / or ROM 103 at the time of product shipment. They can also be obtained from a server device on the Internet 800 via the LAN communication unit 121, etc., after the product is shipped. Alternatively, the aforementioned operating procedures stored on a memory card or optical disc can be obtained via the expansion interface unit 124, etc. They can also be obtained or updated via broadcast.

[0165] [Structure of the broadcasting station server]

[0166] Figure 3A This is an example of the internal structure of a broadcasting station server 400. The broadcasting 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.

[0167] The main control unit 401 is a microprocessor unit that controls the entire broadcast server 400 according to a prescribed operating procedure. The system bus 402 is a communication path for sending and receiving various data and commands between the main control unit 401 and the various operating modules within the broadcast server 400. RAM 404 is the working area when each operating procedure is executed.

[0168] Storage unit 410 stores basic operation program 4001, content management / publishing program 4002, and content sending program 4003. It also has a content data storage area 4011 and a metadata storage area 4012. Content data storage area 4011 stores the content data of each broadcast program aired by the broadcasting station. Metadata storage area 4012 stores metadata such as program title, program ID, program summary, performers, and broadcast date and time for each of the aforementioned broadcast programs.

[0169] In addition, the basic operation program 4001, content management / publishing program 4002, and content sending program 4003 stored in the storage unit 410 are respectively deployed to the RAM 404, and then the main control unit 401 executes the deployed basic operation program, content management / publishing program, and content sending program, thereby forming the basic operation control unit 4101, the content management / publishing control unit 4102, and the content sending control unit 4103.

[0170] Furthermore, for the sake of simplicity, the following description will focus on the process by which the main control unit 401 controls each action module by deploying and executing the basic action program 4001 stored in the storage unit 410 to the RAM 404. The same description will be given for other action programs.

[0171] The content management / publishing 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 the aforementioned content data and metadata to the service operator in accordance with the contract. Furthermore, when providing content data and metadata to the aforementioned service operator, the content management / publishing control unit 4102 also performs authentication processing on the service operator server 500 as needed.

[0172] The content transmission control unit 4103 performs time planning management for transmitting the content data of the broadcast program stored in the content data storage area 4011 and the program title, program ID, program content copy control information, etc. of the broadcast program stored in the metadata storage area 4012 through the digital broadcast signal transmission unit 460.

[0173] The LAN communication unit 421 connects to the Internet 800 and communicates with the service operator server 500 and other communication devices on the Internet 800. The LAN communication unit 421 includes encoding and decoding circuits. The digital broadcast signal transmission unit 460 modulates and processes the stream consisting of content data and program information data of each broadcast program stored in the content data storage area 4011, and transmits it as a digital broadcast wave via the radio tower 300.

[0174] [Structure of the service operator's server]

[0175] Figure 3B This is an example of the internal structure of a service operator server 500. The service operator server 500 includes a main control unit 501, a system bus 502, RAM 504, a storage unit 510, and a LAN communication unit 521.

[0176] The main control unit 501 is a microprocessor unit that controls the entire service operator server 500 according to a prescribed operating procedure. The system bus 502 is a communication path for sending and receiving various data and commands between the main control unit 501 and the various operating modules within the service operator server 500. The RAM 504 is the working area when each operating procedure is executed.

[0177] Storage unit 510 stores basic operating procedures 5001, content management / publishing procedures 5002, and application management / publishing procedures 5003. It also includes a content data storage area 5011, a metadata storage area 5012, and an application storage area 5013. Content data storage area 5011 and metadata storage area 5012 store content data and metadata provided from the broadcasting station server 400, or content created by the service operator and metadata about the aforementioned content. Application storage area 5013 stores applications (operating procedures and / or various data, etc.) required for implementing various services of the broadcast communication cooperation system in response to requests from various television receivers.

[0178] In addition, the basic operation program 5001, content management / publishing program 5002, and application management / publishing program 5003 stored in the storage unit 510 are respectively deployed to the RAM 504, and then the main control unit 501 executes the deployed basic operation program, content management / publishing program, and application management / publishing program, thereby constituting the basic operation control unit 5101, the content management / publishing control unit 5102, and the application management / publishing control unit 5103.

[0179] Furthermore, for the sake of simplicity, the following description will focus on the process by which the main control unit 501 controls each action module by deploying and executing the basic action program 5001 stored in the storage unit 510 to the RAM 504. The basic action control unit 5101 will then control each action module. The same description will be given for other action programs.

[0180] The content management / distribution control unit 5102 manages the content data and metadata obtained from the broadcast server 400, the content data storage area 5011, and the metadata storage area 5012, as well as controls the distribution of the aforementioned content data and metadata to each television receiver. Additionally, 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 as needed.

[0181] The LAN communication unit 521 connects to the Internet 800 and communicates with the broadcast server 400 and other communication devices on the Internet 800. Additionally, it communicates with the broadcast receiver 100 and the portable information terminal 700 via the router device 800R. The LAN communication unit 521 includes encoding and decoding circuits, etc.

[0182] [Broadcast waves of digital broadcasting]

[0183] Here, an example of a digital broadcast wave received by a broadcast receiving device according to an embodiment of the present invention will be described.

[0184] The broadcast receiver 100 is capable of receiving at least a portion of terrestrial digital broadcast services whose specifications are common to the ISDB-T (Integrated Services Digital Broadcasting for Terrestrial Television Broadcasting) method. Specifically, the polarization-dual-mode terrestrial digital broadcasting that the second modem 130T can receive is a portion of advanced terrestrial digital broadcasting whose specifications are common to the ISDB-T method. Furthermore, the layered multiplexing terrestrial digital broadcasting that the third modem 130L can receive is a portion of advanced terrestrial digital broadcasting whose specifications are common to the ISDB-T method. Additionally, the current terrestrial digital broadcasting that the first modem 130C can receive is ISDB-T terrestrial digital broadcasting. Furthermore, the advanced BS digital broadcasting and advanced CS digital broadcasting that the fourth modem 130B can receive are digital broadcasting methods different from ISDB-T.

[0185] Here, the polarization-dual-purpose terrestrial digital broadcasting and layered multiplexing terrestrial digital broadcasting in this embodiment, like the ISDB-T method, employ OFDM (Orthogonal Frequency Division Multiplexing), one of the multi-carrier methods, as the transmission mode. Because OFDM is a multi-carrier method, the symbol length is long, and the added redundancy in the time axis direction, called the guard interval, is effective, mitigating the impact of multipath propagation within the guard interval. Therefore, SFN (Single Frequency Network) can be implemented, effectively utilizing the frequency.

[0186] In this embodiment, the dual-purpose polarization wave terrestrial digital broadcasting and layered multiplexing terrestrial digital broadcasting, similar to the ISDB-T method, divide the OFDM carrier into groups called segments, such as... Figure 4A As shown, the bandwidth of a digital broadcasting service channel consists of 13 segments. The central portion of the bandwidth is designated as segment 0, and segment numbers (0-12) are assigned sequentially above and below it. In this embodiment, the channel coding for polarized dual-use terrestrial digital broadcasting and layered multiplexing terrestrial digital broadcasting is performed on a segment-by-segment basis (OFDM). Therefore, layered transmission can be defined; for example, within the bandwidth of a single television channel, a portion of the OFDM segments can be allocated to fixed reception services, and the remainder to mobile reception services. In layered transmission, each layer consists of one or more OFDM segments, and parameters such as carrier modulation scheme, internal coding rate, and time interleaving length can be set for each layer. Furthermore, the number of layers can be arbitrarily set, for example, a maximum of three layers. Figure 4B The diagram shows an example of OFDM segment layering when the number of layers is set to 3 or 2. Figure 4BIn example (1), the number of layers is 3. Layer A consists of 1 segment (segment 0), layer B consists of 7 segments (segment 1 to 7), and layer C consists of 5 segments (segment 8 to 12). Figure 4B In example (2), the number of layers is 3. Layer A consists of 1 segment (segment 0), layer B consists of 5 segments (segment 1 to 5), and layer C consists of 7 segments (segment 6 to 12). Figure 4B In example (3), the number of layers is 2. Layer A consists of 1 segment (segment 0), and layer B consists of 12 segments (segments 1 to 12). The number of OFDM segments and channel coding parameters of each layer are determined according to the grouping information, and the control information used to assist the receiver's operation is the TMCC signal transmission.

[0187] In addition, as Figure 4B Here is an example of the use of segment layering in (1), (2), and (3), for example, the following examples are possible.

[0188] For example, Figure 4B The layering of (1) can be used in this embodiment of dual-purpose polarized wave terrestrial digital broadcasting. The same segment layering can be used for both horizontally polarized waves and vertically polarized waves. Specifically, the mobile reception service of existing terrestrial digital broadcasting can be transmitted using the above-mentioned segment of horizontally polarized waves as layer A. (In addition, the mobile reception service of existing terrestrial digital broadcasting can also be transmitted using the above-mentioned segment of vertically polarized waves. In this case, it is also considered as layer A.) In addition, the existing terrestrial digital broadcasting service, 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 the above-mentioned 7 segments of horizontally polarized waves as layer B. (Additionally, the terrestrial digital broadcasting service transmitting images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically can also transmit the same service using the aforementioned 7 segments of vertically polarized waves. In this case, it is also considered as Layer B.) Furthermore, as Layer C, it can be configured to transmit advanced terrestrial digital broadcasting services with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically using the aforementioned 5 segments of both horizontally and vertically polarized waves, totaling 10 segments. Details regarding this transmission will be described later. The transmission waves of this layered structure can, for example, be received by the second modem 130T of the broadcast receiving device 100.

[0189] For example, Figure 4B The layering of (2) can be used in this embodiment of polarization-wave dual-purpose terrestrial digital broadcasting as a... Figure 4B(1) For different examples, the same segment layer can be used for both horizontally polarized and vertically polarized waves. Specifically, as layer A, the existing terrestrial digital broadcasting mobile reception service can be transmitted using the aforementioned segment of the horizontally polarized wave. (In addition, the existing terrestrial digital broadcasting mobile reception service can also be transmitted using the aforementioned segment of the vertically polarized wave. In this case, it is also considered layer A.) Furthermore, layer B can be configured to transmit an advanced terrestrial digital broadcasting service capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically using the aforementioned 5 segments of both horizontally polarized and vertically polarized waves, totaling 10 segments. In addition, as layer C, the existing terrestrial digital broadcasting service, that is, the terrestrial digital broadcasting service transmitting images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, can be transmitted using the aforementioned 7 segments of the horizontally polarized wave. (Additionally, the terrestrial digital broadcasting service transmitting images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically can also transmit the same service using the aforementioned 7 segments of vertically polarized waves. In this case, it is also considered as layer C.) Details regarding this transmission will be described later. The transmission wave of this layered segment can, for example, be received by the second modem 130T of the broadcast receiving apparatus 100 of this embodiment.

[0190] For example, Figure 4B The layering of (3) can be used in both the layered multiplexing terrestrial digital broadcasting of this embodiment and conventional terrestrial digital broadcasting. Specifically, when used in layered multiplexing terrestrial digital broadcasting, the mobile reception service of conventional terrestrial digital broadcasting can be transmitted using the 1 segment shown in the figure as layer A. Furthermore, layer B can be configured to transmit advanced terrestrial digital broadcasting services that can transmit images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically using the 12 segments shown in the figure. The transmission wave of this layered segment can be received, for example, by the third modem 130L of the broadcast receiving apparatus 100 of this embodiment. When used in conventional terrestrial digital broadcasting, the mobile reception service of conventional terrestrial digital broadcasting can be transmitted using the 1 segment shown in the figure as layer A, and the terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically using the 12 segments shown in the figure as layer B. The transmission wave of this layered segment can be received, for example, by the first modem 130C of the broadcast receiving apparatus 100 of this embodiment.

[0191] exist Figure 4CThis diagram illustrates an example of a broadcasting station system that implements the generation and processing of digital broadcast waves, i.e., OFDM transmission waves, for both polarization-based dual-use terrestrial digital broadcasting and layered multiplexing terrestrial digital broadcasting according to this embodiment. The information source coding unit 411 encodes images, audio, and various data separately. The multiplexing unit / conditional access processing unit 415 multiplexes the images, audio, and various data encoded separately by the information source coding unit 411, and then performs appropriate processing corresponding to conditional access, outputting them as packet streams. Multiple information source coding units 411 and multiplexing units / conditional access processing units 415 can exist in parallel, generating multiple packet streams. In the channel coding unit 416, these multiple packet streams are multiplexed again to form one packet stream, and channel coding processing is performed, outputting it as an OFDM transmission wave. Figure 4C Although the details of the source coding and channel coding methods differ in the structure shown, the structure for generating OFDM transmission waves is common to the ISDB-T method. Therefore, among the multiple source coding units 411 and the multiplexing unit / conditional access processing unit 415, some can be designed for ISDB-T terrestrial digital broadcasting services, and some for advanced terrestrial digital broadcasting services. The signal coding unit 416 multiplexes the packet streams of multiple different terrestrial digital broadcasting services. When the multiplexing unit / conditional access processing unit 415 is designed for ISDB-T terrestrial digital broadcasting services, it generates a stream of TSP (Transport Stream Packet) as specified in the MPEG-2 system, i.e., MPEG-2TS. Alternatively, when the multiplexing unit / conditional access processing unit 415 is designed for advanced terrestrial digital broadcasting services, it generates an MMT packet stream, a TLV stream including MMT packets, or a stream of TSP as specified in other systems. Of course, it is also possible to make all the multiple information source coding units 411 and multiplexing units / conditional access processing units 415 into a structure for advanced terrestrial digital broadcasting services, so that all the packet streams multiplexed by the channel coding unit 416 become packet streams for advanced terrestrial digital broadcasting services.

[0192] exist Figure 4D The diagram shows an example of the structure of the channel coding unit 416.

[0193] First of all, for Figure 4D (1) will be explained. Figure 4D (1) is the structure of the channel coding unit 416 in the case of generating only the OFDM transmission wave of the existing terrestrial digital broadcasting service. The OFDM transmission wave transmitted using this structure, for example, has... Figure 4BThe segment structure of (3). The packet stream input from the multiplexing unit / conditional reception processing unit 415 and subjected to re-multiplexing processing is given error correction redundancy and subjected to various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving. Afterwards, together with the pilot signal, TMCC signal, and AC signal, it is processed based on IFFT (Inverse Fast Fourier Transform), and after being given a guard interval, it is orthogonally modulated into an OFDM transmission wave. In addition, the external encoding processing, power diffusion processing, byte interleaving, internal encoding processing, and mapping processing are configured to be able to process each layer, such as layer A and layer B, separately. (In addition, the current terrestrial digital broadcasting service uses 2 layers in digital broadcasting, but can transmit up to 3 layers, so Figure 4D Example of a 3-layer model is shown in (1). ) The mapping process is the carrier modulation process. Additionally, for the packet stream input from the multiplexing unit / conditional reception processing unit 415, TMCC information, mode, or guard interval ratio information can also be multiplexed. Furthermore, for the packet stream input from the channel coding unit 416, as described above, it can be a TSP stream specified in the MPEG-2 system. Figure 4D The OFDM transmission wave generated by the structure of (1) can be received, for example, by the first modulation and demodulation unit 130C of the broadcast receiving device 100 of this embodiment.

[0194] Next, regarding Figure 4D (2) will be explained. Figure 4D (2) is the structure of the channel coding unit 416 in the case of generating an OFDM transmission wave for dual-purpose polarization-wave terrestrial digital broadcasting in this embodiment. The OFDM transmission wave transmitted using this structure, for example, has... Figure 4B The segment structure of (1) or (2). Figure 4D In step (2), the packet stream input from the multiplexing unit / conditional reception processing unit 415 and subjected to re-multiplexing processing is also given error correction redundancy and subjected to various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving. Afterwards, it is processed based on IFFT along with the pilot signal, TMCC signal, and AC signal, and after guard interval additional processing, it is orthogonally modulated into an OFDM transmission wave.

[0195] Figure 4D In the structural example (2), external encoding processing, power diffusion processing, byte interleaving, internal encoding processing, mapping processing, and time interleaving are configured to process each layer, such as layer A, layer B, and layer C, separately. However, Figure 4DIn the structural example (2), not only are horizontally polarized (H) OFDM transmission waves generated, but also vertically polarized (V) OFDM transmission waves are generated, and the processing flow is branched into two systems. When branching from the horizontally polarized (H) processing system to the vertically polarized (V) processing system, whether the data is the same as that of the horizontally polarized (H) processing system, the data is different from that of the horizontally polarized (H) processing system, or the data is not branched to the vertically polarized (V) processing system, can be used to... Figure 4B The segment structure described in (1) or (2) is different for each layer.

[0196] Figure 4D The external encoding, internal encoding, mapping, and other processing shown in the structure of (2) are related to... Figure 4D In addition to having compatible processing capabilities, the structure of (1) can be used Figure 4D More advanced processing methods not employed in the various processes of structure (1). Specifically, Figure 4D In the structure of (2), regarding the part that processes by each layer, in the layers for transmitting current terrestrial digital broadcasting mobile reception services and transmitting current terrestrial digital broadcasting services with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, the processing of external encoding, internal encoding, mapping, etc., is performed in accordance with... Figure 4D The structure of (1) has compatible processing. In contrast, Figure 4D In the structure of (2), regarding the part that processes each layer, for the layer that transmits advanced terrestrial digital broadcasting services capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically, the processing of external encoding, internal encoding, mapping, etc., is configured to use... Figure 4D More advanced processing methods not used in the various processing of the structure of (1) can be adopted.

[0197] In addition, in the polarization-wave dual-purpose terrestrial digital broadcasting of this embodiment, the TMCC information described later can also be used to switch the allocation of the layer and the transmitted terrestrial digital broadcasting service. Therefore, it is preferably configured to use TMCC information to switch the external encoding, internal encoding, mapping and other processing performed on each layer.

[0198] Furthermore, regarding the layer for transmitting advanced terrestrial digital broadcasting services capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically, byte interleaving, bit interleaving, and time interleaving can be processed in a way compatible with existing terrestrial digital broadcasting services, or more advanced and different processes can be implemented. Alternatively, for the layer transmitting advanced terrestrial digital broadcasting services, some interleaving can be omitted.

[0199] in addition, Figure 4D In the structure of (2), the input stream of the layer that is the source of the mobile reception service for transmitting 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 the TSP stream specified in the MPEG-2 system used in current terrestrial digital broadcasting in the packet stream input to the channel coding unit 416. Figure 4D The input stream of the structure (2) used as the source of the layer for transmitting advanced terrestrial digital broadcasting services can be a stream specified in a system other than the packet stream input to the channel coding unit 416, such as an MMT packet stream or a TLV including MMT packets, or a TSP stream specified in the MPEG-2 system. However, in advanced terrestrial digital broadcasting services, a TSP stream specified in the MPEG-2 system can also be used.

[0200] The above explanation Figure 4D In the structure of (2), from the input stream to the generation of the OFDM transmission wave, in the layers of transmitting current terrestrial digital broadcasting mobile reception services and transmitting current terrestrial digital broadcasting services with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, the stream format and processing are maintained to be compatible with current terrestrial digital broadcasting. Thus, the receiving device of the existing current terrestrial digital broadcasting service receives data using... Figure 4D In the case of the transmission wave of either the horizontally polarized OFDM transmission wave or the vertically polarized OFDM transmission wave generated by the structure of (2), the broadcast signal of the terrestrial digital broadcast service can be correctly received and demodulated for the layer transmitting the current terrestrial digital broadcast mobile reception service and the current terrestrial digital broadcast service transmitting images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically.

[0201] in addition, Figure 4D In the structure of (2), in the layer of both the horizontally polarized OFDM transmission wave and the vertically polarized OFDM transmission wave, an advanced terrestrial digital broadcasting service is capable of transmitting images with a maximum resolution of more than 1920 pixels horizontally × 1080 pixels vertically. The broadcast signal of the advanced terrestrial digital broadcasting service can be received and demodulated by the broadcast receiving device 100 of the embodiment of the present invention.

[0202] That is, using Figure 4D The structure of (2) is capable of generating digital broadcast waves that can be properly received and demodulated in both broadcast receiving devices that support advanced terrestrial digital broadcasting services and existing terrestrial digital broadcasting service receiving devices.

[0203] Next, regarding Figure 4D (3) will be explained. Figure 4D (3) is the structure of the channel coding unit 416 in the case of generating OFDM transmission waves of layered multiplexing terrestrial digital broadcasting in this embodiment. Figure 4D In step (3), the packet stream input from the multiplexing unit / conditional reception processing unit 415 and subjected to re-multiplexing processing is also given error correction redundancy and subjected to various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving. Afterwards, it is processed based on IFFT along with the pilot signal, TMCC signal, and AC signal, and after adding a guard interval, it is orthogonally modulated into an OFDM transmission wave.

[0204] but, Figure 4D In the structure of (3), after generating and multiplexing the modulation wave transmitted by the upper layer and the modulation wave transmitted by the lower layer respectively, a digital broadcast wave, namely OFDM transmission wave, is generated. Figure 4D The processing system shown on the upper side of the structure (3) is a processing system for generating modulated waves for transmission in the upper layer, and the processing system shown on the lower side is a processing system for generating modulated waves for transmission in the lower layer. Figure 4D The data transmitted in the processing system of the modulation wave used for the generation of (3) is the current terrestrial digital broadcasting mobile reception service and the current terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically. Figure 4D The generation of (3) uses various processing methods in the upper-layer transmission modulation wave processing system, which is related to... Figure 4D The various processing of (1) are the same or compatible processing. Figure 4D (3) uses the modulated wave transmitted from the upper layer, for example with Figure 4D The transmitted wave of (1) also has Figure 4B The segment structure of (3). Therefore, Figure 4D (3) The modulated wave transmitted from the upper layer is a digital broadcast wave that is compatible with the existing terrestrial digital broadcasting mobile reception service and the existing terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically. In contrast, in Figure 4D The data transmitted in the processing system of the modulation wave used for the generation of (3) is an advanced terrestrial digital broadcasting service capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically. For example, it is configured to use external coding, internal coding, mapping, and other processing. Figure 4D More advanced processing methods not used in the various processing of the structure of (1) can be adopted.

[0205] Figure 4D(3) The modulated wave transmitted from the lower layer can, for example, all 13 segments can be allocated as Layer A to an advanced terrestrial digital broadcasting service capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically. Alternatively, it can also have Figure 4B The (3) segment structure uses a 1-segment A layer to transmit the existing terrestrial digital broadcasting mobile reception service, and a 12-segment B layer to transmit advanced terrestrial digital broadcasting services capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically. In the latter case, with Figure 4D Similarly, (2) can be configured to switch between each layer, from external encoding processing to time interleaving processing, such as layer A and layer B. In the layer transmitting mobile reception services for existing terrestrial digital broadcasting, it is necessary to maintain processing compatible with existing terrestrial digital broadcasting, which is consistent with... Figure 4D The explanation for (2) is the same.

[0206] Figure 4D In the structure of (3), a terrestrial digital broadcast wave, namely an OFDM transmission wave, is generated by multiplexing the modulated wave transmitted from the upper layer and the modulated wave transmitted from the lower layer. The technology for separating the modulated wave transmitted from the upper layer from this OFDM transmission wave is also incorporated into existing receiving devices for current terrestrial digital broadcast services. Therefore, broadcast signals from current terrestrial digital broadcast mobile receiving services and broadcast signals from current terrestrial digital broadcast services that transmit images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically, which are included in the modulated wave transmitted from the upper layer, can be correctly received and demodulated by existing receiving devices for current terrestrial digital broadcast services. In contrast, broadcast signals from advanced terrestrial digital broadcast services that are included in the modulated wave transmitted from the lower layer and are capable of transmitting images with a maximum resolution exceeding 1920 pixels horizontally × 1080 pixels vertically, can be received and demodulated by the broadcast receiving device 100 of the embodiments of the present invention.

[0207] That is, using Figure 4D The structure of (3) enables the generation of digital broadcast waves that can be appropriately received and demodulated in both broadcast receiving devices supporting advanced terrestrial digital broadcasting services and existing terrestrial digital broadcasting service receiving devices. Furthermore, Figure 4D In the structure of (3), with Figure 4D The structure of (2) is different, and it does not require the use of multiple polarization waves, and can generate OFDM transmission waves that can be received more easily.

[0208] This embodiment Figure 4D (1) Figure 4D (2) and Figure 4DIn the OFDM transmission wave generation process of (3), considering the adaptability to the inter-site distance of SFN and the tolerance to Doppler frequency shift in mobile reception, three modes with different numbers of carriers are prepared. In addition, other modes with different numbers of carriers can also be prepared. In the mode with more 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 enables it to be tolerant to multipath with longer delay time differences. On the other hand, in the mode with fewer carriers, the carrier interval becomes wider, which makes it less susceptible to the influence of inter-carrier interference caused by Doppler frequency shift in mobile reception and other situations.

[0209] This embodiment Figure 4D (1) Figure 4D (2) and Figure 4D In the OFDM transmission wave generation process of (3), parameters such as carrier modulation mode, internal coding rate, and time interleaving length can be set for each layer composed of one or more OFDM segments. Figure 4E The figure shows an example of the transmission parameters for one unit of the OFDM segment in the system of this embodiment using pattern recognition. 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 modulation schemes different from those of the "data" carrier. These signals are more sensitive to noise than the amount of information, so a modulation scheme that maps to a constellation with fewer states (BPSK or DBPSK, i.e., 2 states) compared to the modulation scheme of the "data" carrier (all of which are QPSK or higher, i.e., 4 states or higher) is used to improve noise resistance.

[0210] Furthermore, among the various carrier number values, the values ​​to the left of the slash represent those using QPSK, 16QAM, or 64QAM as the carrier modulation method, while the values ​​to the right represent those using DQPSK. In the figure, the underlined parameters are those incompatible with current terrestrial digital broadcasting mobile reception services. Specifically, the modulation methods 256QAM, 1024QAM, and 4096QAM for the "data" carrier are not used in current terrestrial digital broadcasting services. Therefore, this embodiment... Figure 4D (1) Figure 4D (2) and Figure 4DIn the OFDM broadcast wave generation process of (3), in the layer processing that needs to be compatible with the existing terrestrial digital broadcasting service, the modulation schemes of 256QAM, 1024QAM, and 4096QAM for the "data" carrier are not used. For the "data" carrier transmitted using the layer that supports advanced terrestrial digital broadcasting services, in addition to the modulation schemes such as QPSK (state number 4), 16QAM (state number 16), and 64QAM (state number 64) which are compatible with the existing terrestrial digital broadcasting services, modulation schemes with more values ​​such as 256QAM (state number 256), 1024QAM (state number 1024), or 4096QAM (state number 4096) can also be used. Alternatively, modulation schemes different from these modulation schemes can also be used.

[0211] Furthermore, the modulation scheme for the pilot symbol (SP or CP) carrier can use BPSK (state number 2), which is compatible with the existing terrestrial digital broadcasting service. The modulation scheme for the AC carrier and TMCC carrier can use DBPSK (state number 2), which is compatible with the existing terrestrial digital broadcasting service.

[0212] Furthermore, LDPC encoding, as an internal encoding method, is not used in current terrestrial digital broadcasting services. Therefore, this embodiment... Figure 4D (1) Figure 4D (2) and Figure 4D In the OFDM broadcast wave generation process of (3), LDPC encoding is not used in the layer processing that needs to be compatible with the existing terrestrial digital broadcasting service. For data transmitted using a layer that supports advanced terrestrial digital broadcasting services, LDPC encoding can be applied as internal encoding. Furthermore, BCH encoding is not used in the existing terrestrial digital broadcasting service as an external encoding method. Therefore, in this embodiment... Figure 4D (1) Figure 4D (2) and Figure 4D In the OFDM broadcast wave generation process of (3), which requires compatibility with existing terrestrial digital broadcasting services, BCH encoding is not used. For data transmitted using layers that support advanced terrestrial digital broadcasting services, BCH encoding can be applied as an external encoding.

[0213] In addition, Figure 4F The image below shows this embodiment. Figure 4D (1) Figure 4D (2) and Figure 4D An example of the transmission signal parameters for one physical channel (6MHz bandwidth) unit of OFDM broadcast wave generation processing in (3). This embodiment Figure 4D (1) Figure 4D (2) and Figure 4DIn the OFDM broadcast wave generation process of (3), in order to be compatible with the existing terrestrial digital broadcasting service, basically, Figure 4F In principle, the parameters used should be compatible with existing terrestrial digital broadcasting services. However, in Figure 4D In case (3) where all segments are allocated to the advanced terrestrial digital broadcasting service using the modulated wave transmitted from the lower layer, there is no need to maintain compatibility with the existing terrestrial digital broadcasting service in that modulated wave. Therefore, in this case, for Figure 4D (3) can also use the modulated wave transmitted from the lower layer. Figure 4F Parameters other than those shown.

[0214] Next, the carrier of the OFDM transmission wave in this embodiment will be described. The carrier of the OFDM transmission wave in this embodiment includes a carrier for transmitting data such as images and sound, a carrier for transmitting pilot signals (SP, CP, AC1, AC2) as a demodulation reference, and a carrier for transmitting TMCC signals containing information such as the modulation format and convolutional coding rate. For these transmissions, a number of carriers equivalent to 1 / 9 of the number of carriers in each segment is used. Furthermore, concatenated coding is used for error correction, shortened Reed-Solomon (204, 188) coding is used for external coding, and pruning convolutional coding with a constraint length of 7 and a coding rate of 1 / 2 is used for internal coding. Different coding methods can be used for both external and internal coding. The information rate varies depending on parameters such as the carrier modulation format, convolutional coding rate, and guard interval ratio.

[0215] Additionally, a 204 symbol is used as one frame, and each frame contains an integer number of TSPs. Switching of transmission parameters occurs at the boundaries of this frame.

[0216] The pilot signal used as the demodulation reference includes SP (Scattered Pilot), CP (Continual Pilot), AC (Auxiliary Channel) 1, and AC2. Figure 4G The diagram illustrates an example of the configuration of pilot signals (SPs) within a segment in the case of synchronous modulation (QPSK, 16QAM, 64QAM, 256QAM, 1024QAM, 4096QAM, etc.). SPs are inserted into the synchronous modulation segment and transmitted once every 12 carriers in the carrier number (frequency axis) direction and once every 4 symbols in the OFDM symbol number (time axis) direction. Because the amplitude and phase of the SP are known, they can be used as a reference for synchronous demodulation. Figure 4H The diagram shows an example of the configuration of pilot signals, etc., within a segment in the case of differential modulation (DQPSK, etc.). CP is a continuous signal inserted at the left end of the differential modulation segment for demodulation.

[0217] AC1 and AC2 load information onto the CP and, in addition to their function as pilot signals, are used to transmit information intended for broadcast operators. They can also be used to transmit other information.

[0218] in addition, Figure 4G and Figure 4H The configuration diagrams shown are examples of Mode 3, with carrier numbers ranging from 0 to 431. In Modes 1 and 2, the carrier numbers are 0 to 107 and 0 to 215, respectively. Furthermore, the carriers transmitting AC1, AC2, and TMCC can be predetermined for each segment. Additionally, to mitigate the periodic degradation of channel characteristics caused by multipath propagation, the carriers transmitting AC1, AC2, and TMCC are randomly configured in the frequency direction.

[0219] [TMCC signal]

[0220] Information such as the TMCC signal transmission layer structure and OFDM band transmission parameters, as well as information about the receiver's demodulation operations (TMCC information). The TMCC signal is transmitted using the carrier specified for TMCC transmission within each band. Figure 5A The diagram illustrates an example of bit allocation for a TMCC carrier. The TMCC carrier consists of 204 bits (B0–B203). B0 is the demodulation reference signal used for the TMCC symbol, with a defined amplitude and phase reference. B1–B16 are synchronization signals, each consisting of a 16-bit word. Two synchronization signals, w0 and w1, are specified and transmitted alternately in each frame. B17–B19 are used to identify the segment format, distinguishing between differential and synchronous modulation sections. B20–B121 contain TMCC information. B122–B203 are parity bits.

[0221] In this embodiment, the TMCC information of the OFDM transmission wave is configured, for example, to include a system identifier, transmission parameter switching index, start control signal (start flag for emergency alarm broadcast), current information, subsequent information, frequency conversion processing identifier, physical channel number identifier, main signal identifier, 4K signal transmission layer identifier, and additional layered transmission identifier, etc., as information used to assist the receiver's demodulation and decoding operations. The current information indicates the current layer structure and transmission parameters, and the subsequent information indicates the layer structure and transmission parameters after the switch. Transmission parameter switching is performed frame-by-frame. Figure 5B An example of the bit allocation for TMCC information is shown below. Additionally, in Figure 5CThe diagram shows an example of the structure of transmission parameter information included in the current / subsequent information. Additionally, the link transmission phase correction amount is control information used in common transmission methods such as terrestrial digital sound broadcasting ISDB-TSB (ISDB for Terrestrial Sound Broadcasting), and detailed explanations are omitted here.

[0222] exist Figure 5D The diagram shows an example of bit allocation for the system identifier. Two bits are allocated to the signal used for the system identifier. In the case of a conventional terrestrial digital television broadcasting system, "00" is set. In the case of a terrestrial digital audio broadcasting system with a common transmission method, "01" is set. Furthermore, in the case of advanced terrestrial digital television broadcasting systems such as polarization-based dual-mode terrestrial digital broadcasting or layered multiplexing terrestrial digital broadcasting systems as described in this embodiment, "10" is set. In advanced terrestrial digital television broadcasting systems, by transmitting broadcast waves using polarization-based dual-mode transmission or layered multiplexing, it is possible to simultaneously transmit 2K broadcast programs (broadcast programs of images with a horizontal resolution of 1920 pixels × vertical resolution, or broadcast programs of images with resolutions lower than 1080 pixels) and 4K broadcast programs (broadcast programs of images exceeding 1920 pixels × vertical resolution) within the same service.

[0223] The transmission parameter switching indicator is used to notify the receiver of the switching timing by counting down in the event of a transmission parameter switch. This indicator is typically a value of "1111", and decreases by 1 every frame starting 15 frames before the switch. The switching timing is synchronized with the frame following the transmission of "0000". The indicator value returns to "1111" after "0000". Figure 5B The countdown is performed when any one or more of the following parameters are included in the system identifier and current / successor information of the TMCC information: transmission parameters, frequency conversion processing identifier, main signal identifier, 4K signal transmission layer identifier, and additional layered transmission identifier. The countdown is not performed when only the start control signal of the TMCC information is switched.

[0224] The start control signal (start flag for emergency alarm broadcast) is set to "1" when the receiver is started during the emergency alarm broadcast, and set to "0" when no start control is performed.

[0225] The partial reception flags for current and subsequent information are set to "1" if the segment in the center of the transmission band is set to partial reception, and set to "0" otherwise. If segment 0 is set to partial reception, that layer is designated as layer A. If no subsequent information exists, the partial reception flag is set to "1".

[0226] exist Figure 5E The diagram illustrates an example of bit allocation for the carrier modulation mapping (modulation of the data carrier) in the transmission parameters of each layer for both current and subsequent information. A value of "000" indicates DQPSK modulation. "001" indicates QPSK modulation. "010" indicates 16QAM modulation. "011" indicates 64QAM modulation. "100" indicates 256QAM modulation. "101" indicates 1024QAM modulation. "110" indicates 4096QAM modulation. If the layer is unused or there is no subsequent information, this parameter is set to "111".

[0227] Settings such as coding rate and time interleaving length can be set according to the grouping information of each layer of the current / successor information. The number of segments is represented by a 4-bit value for each layer. "1111" is set for unused layers or when there is no successor information. Furthermore, settings such as mode and guard interval ratio are detected independently at the receiver, so TMCC information can be omitted during transmission.

[0228] exist Figure 5F The image shows an example of bit allocation for a frequency conversion processing identifier. The frequency conversion processing identifier, in... Figure 2A When frequency conversion processing (in the case of dual-purpose polarization transmission) or frequency conversion amplification processing (in the case of layered multiplexing transmission) is performed in the conversion unit 201T or conversion unit 201L, the parameter is set to "0". When no frequency conversion processing or frequency conversion amplification processing is performed, the parameter is set to "1". For example, this parameter can be configured such that it is set to "1" when transmitting from a broadcast station, and rewritten to "0" in the conversion unit 201T or conversion unit 201L when frequency conversion processing or frequency conversion amplification processing is performed. Thus, when received by the second modem 130T or third modem 130L of the broadcast receiver 100, if the bit of the frequency conversion processing identifier is "0", it can be recognized that the OFDM transmission wave underwent frequency conversion processing after being transmitted from the broadcast station.

[0229] In this embodiment of dual-purpose polarization wave terrestrial digital broadcasting, the frequency conversion processing identifier bits are set and rewritten separately for various polarization waves. For example, if neither of the multiple polarization waves is... Figure 2AIf the conversion unit 201T performs frequency conversion, the frequency conversion processing identification bit included in the OFDM transmission waves of both polarized waves is kept at "1". Alternatively, if the conversion unit 201T performs frequency conversion only on the polarized wave of one of the multiple polarized waves, the frequency conversion processing identification bit included in the OFDM transmission wave of the polarized wave that underwent frequency conversion is rewritten to "0" in the conversion unit 201T. Conversely, if the conversion unit 201T performs frequency conversion on both of the multiple polarized waves, the frequency conversion processing identification bit included in the OFDM transmission waves of both polarized waves that underwent frequency conversion is rewritten to "0" in the conversion unit 201T. In this way, the broadcast receiver conversion device 100 can identify whether frequency conversion has been performed for each polarized wave among multiple polarized waves.

[0230] Furthermore, because this frequency conversion processing identifier bit is not defined in current terrestrial digital broadcasting, it is ignored in terrestrial digital broadcasting receiving devices already in use by users. However, this bit can also be used in new terrestrial digital broadcasting services that improve upon current terrestrial digital broadcasting by transmitting images with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically. In this case, the first modem 130C of the broadcast receiving device 100 of this embodiment of the invention can also be configured as a first modem 130C supporting this new terrestrial digital broadcasting service.

[0231] Additionally, as a variation, it can also be used Figure 2A The parameter is preset to "0" when transmitting from the broadcasting station, provided that the conversion unit 201T or 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 broadcasting service, the parameter can be configured to be set to "1".

[0232] exist Figure 5GThe diagram illustrates an example of the bit allocation for the Physical Channel Number (PCL) identifier. The PCL identifier consists of a 6-bit code that identifies the physical channel number (ch 13-52) of the received broadcast wave. If the received broadcast wave is not an Advanced Terrestrial Digital Broadcasting (ATD) service, this parameter is set to "111111". This PCL identifier bit is not defined in current terrestrial digital broadcasting, and current terrestrial digital broadcasting receiving devices cannot obtain the physical channel number of the broadcast wave designated by the broadcasting station from TMCC signals and AC signals. In the broadcast receiving device 100 of this embodiment, using the bits of the PCL identifier of the received OFDM transmission wave, the physical channel number assigned by the broadcasting station to the OFDM transmission wave can be determined even without demodulating carriers other than TMCC and AC signals. Furthermore, the physical channels 13-52 are pre-allocated within a frequency band of 470-710 MHz, with a bandwidth of 6 MHz per channel. Therefore, the broadcast receiving device 100 can determine the physical channel number of the OFDM transmission wave based on the bits of the physical channel number identifier, which means it can determine the frequency band of the OFDM transmission wave as a terrestrial digital broadcast wave transmitted in the air.

[0233] In this embodiment of polarization-based dual-purpose terrestrial digital broadcasting, during the OFDM transmission wave generation process at the broadcasting station, for the paired multiple polarization waves that originally constituted one physical channel, a physical channel number identifier bit is configured for each, and the same physical number is appended. Here, depending on the setup environment of the broadcast receiving device 100, there are... Figure 2A In the case where the conversion unit 201T only converts the frequency of one of the multiple polarized waves, if the frequencies of the multiple polarized waves received by the broadcast receiver 100 are different, and it cannot be determined by some method that these multiple polarized waves with different frequencies were originally a pair, then the broadcast receiver cannot use the polarized waves of dual-polarization terrestrial digital broadcasting for advanced terrestrial digital broadcasting demodulation. In such a case, if the physical channel number identifier bit is used, then when multiple transmission waves with the same physical channel number identifier bit value exist at different frequencies in the broadcast receiver 100, they can be identified as transmission waves transmitted as a pair of polarized waves that originally constitute one physical channel at the broadcasting station. Therefore, advanced terrestrial digital broadcasting demodulation of dual-polarization terrestrial digital broadcasting can be achieved using multiple transmission waves with the same value.

[0234] exist Figure 5H The image shows an example of bit allocation for the master signal identifier. This example configures the master signal identifier in bit B117.

[0235] When the transmitted OFDM wave is a dual-polarization terrestrial digital broadcasting wave, this parameter is set to "1" in the TMCC information of the transmission wave transmitted using the primary polarization wave. It is set to "0" in the TMCC information of the transmission wave transmitted using the secondary polarization wave. The primary polarization wave refers to a polarization wave signal with the same polarization direction as the one used in the current terrestrial digital broadcasting service, either vertically polarized or horizontally polarized. That is, in areas where horizontally polarized waves are used in the current terrestrial digital broadcasting service, the horizontally polarized wave is the primary polarization wave and the vertically polarized wave is the secondary polarization wave in the dual-polarization terrestrial digital broadcasting service. Similarly, in areas where vertically polarized waves are used in the current terrestrial digital broadcasting service, the vertically polarized wave is the primary polarization wave and the horizontally polarized wave is the secondary polarization wave in the dual-polarization terrestrial digital broadcasting service.

[0236] In the broadcast receiving apparatus 100 that receives the transmission wave of the dual-polarization terrestrial digital broadcast according to an embodiment of the present invention, the received transmission wave can be identified as being transmitted using a primary polarization wave or a secondary polarization wave by using the bits of the primary signal identifier. For example, if the primary polarization wave and secondary polarization wave identification processing is used, it is possible to perform an initial scan of the transmission wave transmitted using the primary polarization wave first, and then perform an initial scan of the transmission wave transmitted using the secondary polarization wave after the initial scan of the transmission wave transmitted using the primary polarization wave is completed.

[0237] Details of the structure of the layers, segments, and transmitted digital broadcasting service for dual-polarization terrestrial digital broadcasting in this embodiment will be described later. When transmitting current terrestrial digital broadcasting services using layers consisting only of segments included in the primary polarization wave, and transmitting advanced terrestrial digital services using layers including segments in both the primary and secondary polarization waves, an initial scan of the transmission wave transmitted using the primary polarization wave can be performed first to complete the initial scan of the current terrestrial digital broadcasting service. Then, an initial scan of the transmission wave transmitted using the secondary polarization wave can be performed to perform the initial scan of the advanced terrestrial digital broadcasting service. This allows the initial scan of the advanced terrestrial digital broadcasting service to be performed after the initial scan of the current terrestrial digital broadcasting service is completed, and it is preferable that the settings based on the initial scan of the current terrestrial digital broadcasting service can be reflected in the settings based on the initial scan of the advanced terrestrial digital broadcasting service.

[0238] Alternatively, the meanings of the "1" and "0" bits of the master signal identifier can be defined in the opposite way to the above description.

[0239] Alternatively, the polarization direction identifier bit can be used as a parameter of the TMCC information instead of the main signal identifier bit. Specifically, for a transmission wave transmitted using horizontally polarized waves, the polarization direction identifier bit is set to "1" at the broadcasting station, and for a transmission wave transmitted using vertically polarized waves, the polarization direction identifier bit is set to "0" at the broadcasting station. In the broadcast receiving device 100 that receives the transmission wave of the polarization-diverse terrestrial digital broadcast according to an embodiment of the present invention, the polarization direction of the received transmission wave can be identified by using this polarization direction identifier bit. For example, if this polarization direction identification processing is used, it is possible to perform an initial scan for transmission waves transmitted using horizontally polarized waves first, and then perform an initial scan for transmission waves transmitted using vertically polarized waves after the initial scan of transmission waves transmitted using horizontally polarized waves is completed, etc. The effect of this processing can be explained simply by replacing "mainly polarized wave" with "horizontally polarized wave" and "secondary polarized wave" with "vertically polarized wave" in the description of the main signal identifier bit regarding the initial scan, so it is omitted from the explanation again.

[0240] Alternatively, the meanings of the "1" and "0" bits in the polarization direction identifier can be defined in the opposite way to the above description.

[0241] Alternatively, instead of the aforementioned main signal identifier bit, the first signal and second signal identifier bits can be used as a parameter of the TMCC information. Specifically, the polarization wave of one of the horizontally polarized wave and the vertically polarized wave is defined as the first polarized wave, and the broadcast signal of the transmission wave transmitted using the first polarized wave is defined as the first signal. The broadcasting station simply sets the first signal and second signal identifier bits to "1". Conversely, the polarization wave of the other polarized wave is defined as the second polarized wave, and the broadcast signal of the transmission wave transmitted using the second polarized wave is defined as the second signal. The broadcasting station simply sets the first signal and second signal identifier bits to "0". In the broadcast receiving device 100 that receives the transmission wave of the polarization-diverse terrestrial digital broadcast according to an embodiment of the present invention, the polarization direction of the received transmission wave during transmission can be identified by using the first signal and second signal identifier bits. Furthermore, the first signal and second signal identifier bits are defined differently from the main signal identifier bits, except that the concepts of "primary polarization wave" and "secondary polarization wave" are replaced with "first polarization wave" and "secondary polarization wave". The processing and effects in the broadcast receiving device 100 can be achieved simply by replacing "primary polarization wave" with "first polarization wave" and "secondary polarization wave" with "secondary polarization wave" in the part about the processing of the broadcast receiving device 100 in the description of the main signal identifier bits. Therefore, further explanation is omitted.

[0242] In addition, the meanings of the "1" and "0" bits of the first and second signal identifiers can also be defined in the opposite way to the above description.

[0243] Next, in the transmission wave of the layered multiplexed terrestrial digital broadcasting in this embodiment, the upper and lower layer identifier bits can be used as a parameter of the TMCC information instead of the aforementioned main signal identifier bits. Specifically, the upper and lower layer identifier bits are 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".

[0244] In this embodiment of layered multiplexing terrestrial digital broadcasting, for the lower layer of multiple modulated waves that were originally transmitted using one physical channel in the OFDM transmission wave generation and processing at the broadcasting station, depending on the setup environment of the broadcast receiving device 100, it may use... Figure 2A The conversion unit 201L performs frequency conversion and signal amplification. In the broadcast receiver 100, when receiving a transmission wave of a layered multiplexed terrestrial digital broadcast, it can identify, based on the aforementioned upper / lower layer identifier bits, whether the modulation wave was originally transmitted using the upper layer or the lower layer. For example, through this identification process, an initial scan of an advanced terrestrial digital broadcast service transmitted using the lower layer can be performed after the initial scan of the current terrestrial digital broadcast service transmitted using the upper layer is completed, and the settings for the initial scan based on the current terrestrial digital broadcast service can be reflected in the settings for the initial scan based on the advanced terrestrial digital broadcast service. Furthermore, in the third modulation / demodulation unit 130L of the broadcast receiver 100, this identification result can also be used to switch between the demodulation unit 133S and the demodulation unit 133L.

[0245] Furthermore, in the following descriptions of the dual-polarization wave transmission methods in the various embodiments, unless otherwise stated, examples are given where the horizontally polarized wave is the primary polarized wave and the vertically polarized wave is the secondary polarized wave. However, the primary-secondary relationship can also be reversed for horizontally and vertically polarized waves.

[0246] exist Figure 5I The image shows an example of bit allocation for the 4K signal transmission layer identifier.

[0247] When the transmitted broadcast wave is the transmission wave of the polarization-dual-mode terrestrial digital broadcasting service of this embodiment, the bits of the 4K signal transmission layer identifier indicate, for layers B and C, whether both horizontally polarized and vertically polarized wave signals are used for 4K broadcast program transmission. One bit is allocated for the settings of layer B and layer C respectively. For example, if the bits of the 4K signal transmission layer identifier for each layer in layers B and C are "0", it indicates that both horizontally polarized and vertically polarized wave signals are used for 4K broadcast program transmission in that layer. If the bits of the 4K signal transmission layer identifier for each layer in layers B and C are "1", it indicates that 4K broadcast programs using both horizontally polarized and vertically polarized wave signals are not used for transmission in that layer. Thus, the broadcast receiving device 100 can use the bits of the 4K signal transmission layer identifier to identify whether both horizontally polarized and vertically polarized wave signals are used for 4K broadcast program transmission in layers B and C.

[0248] Furthermore, when the transmitted broadcast wave is the broadcast wave of the stratified multiplexing terrestrial digital broadcasting service of this embodiment, the bits of the 4K signal transmission layer identifier indicate whether the transmission of the 4K broadcast program can be performed using the lower layer. When the "B119" of this parameter is "0", the 4K broadcast program is transmitted using the lower layer. When the "B119" of this parameter is "1", the 4K broadcast program is not transmitted using the lower layer. In this way, the broadcast receiving device 100 can use the bits of the 4K signal transmission layer identifier to identify whether the transmission of the 4K broadcast program can be performed using the lower layer.

[0249] Additionally, when this parameter is "0", it serves as the carrier modulation mapping method. Figure 5C In addition to the basic modulation scheme shown, NUC (Non-Uniform Constellation) modulation can also be used. In this case, current / successor information regarding additional transmission parameters of layer B / C can be transmitted using AC1, etc.

[0250] Additionally, if the transmitted broadcast wave is not an advanced terrestrial digital broadcasting service, this parameter can be set to "1".

[0251] Alternatively, the definitions of the "0" and "1" bits of the 4K signal transmission layer identifier described above can be reversed.

[0252] exist Figure 5JThe diagram illustrates an example of bit allocation for an additional layered transmission identifier. These additional layered transmission identifier bits indicate whether, in the case of a dual-polarization terrestrial digital broadcasting service in this embodiment, layers B and C of the transmitted wave transmitted using sub-polarization waves are used as either a virtual layer D or a virtual layer E, respectively.

[0253] For example, in the example shown in the diagram, the bit configured in B120 is the D-layer transmission identifier bit. When this parameter is "0", the B-layer transmitted using sub-polarized waves is used as a virtual D-layer. To be more precise, this means that the group of segments within the sub-polarized wave transmission segment that has the same segment number as the segment under the B-layer transmitted using the main polarized wave is considered a different layer from the B-layer transmitted using the main polarized wave, i.e., the D-layer. When this parameter is "1", the B-layer transmitted using sub-polarized waves is not used as a virtual D-layer, but rather as the B-layer itself.

[0254] Additionally, for example, when the bit configured in B121 is the E-layer transmission identifier bit, if this parameter is "0", the C-layer transmitted using sub-polarized waves is used as a virtual E-layer. To be more precise, this means that the group of segments in the sub-polarized wave transmission that has the same segment number as the segments belonging to the C-layer transmitted using the main polarized wave is considered a different layer, i.e., the E-layer, from the C-layer transmitted using the main polarized wave. If this parameter is "1", the C-layer transmitted using sub-polarized waves is not used as a virtual E-layer, but rather as the C-layer itself.

[0255] Thus, in the broadcast receiving device 100, the presence of D-layer and E-layer transmissions transmitted using subpolarized waves can be identified by using bits of the additional layer transmission identifier (D-layer transmission identifier bit and / or E-layer transmission identifier bit). That is, in the terrestrial digital broadcasting of this embodiment, by using… Figure 5J The parameters shown for the additional layered transmission identifier enable the application of new layers beyond the current limitation of three layers (A, B, and C) in terrestrial digital broadcasting. Figure 5J In the example, it is layer D and layer E).

[0256] Additionally, when this parameter is "0", it enables... Figure 5C The carrier modulation mapping scheme, coding rate, and time interleaving length shown differ between the virtual D / virtual E layer and the B / C layer. In this case, if current / successor information regarding the carrier modulation mapping scheme, convolutional coding rate, and time interleaving length of the virtual D / virtual E layer is transmitted using AC information (e.g., AC1), the broadcast receiving device 100 can obtain information about these parameters.

[0257] Alternatively, as a variation, when the bits for the added layer transmission identifiers (D-layer transmission identifier bits and / or E-layer transmission identifier bits) are "0", the transmission parameters of layers B and / or C for the current / successor information of TMCC information transmitted using the sub-polarized wave are switched to the meaning of the transmission parameters of virtual layers D and / or virtual layers E. In this case, when using virtual layers D and / or virtual layers E, in the main polarized wave, layers A, B, and C are used, and the transmission parameters of these layers are used for transmitting the current / successor information of TMCC information transmitted using the main polarized wave. Similarly, in the sub-polarized wave, layers A, D, and E are used, and the transmission parameters of these layers are used for transmitting the current / successor information of TMCC information transmitted using the sub-polarized wave. In this case, the broadcast receiving device 100 can also obtain information about parameters such as the carrier modulation mapping method, convolutional coding rate, and time interleaving length of the virtual layers D / E.

[0258] In addition, if the transmitted broadcast wave is not an advanced terrestrial digital broadcasting service, or if it is an advanced terrestrial digital broadcasting service but uses a layered multiplexing transmission method, this parameter can also be set to "1".

[0259] Alternatively, the parameters for adding layered transmission identifiers can be stored in both the TMCC information of the primary polarization wave and the TMCC information of the secondary polarization wave, but as long as they are stored in at least the TMCC information of the secondary polarization wave, the above processing can be achieved.

[0260] Alternatively, the definitions of the "0" and "1" bits of the additional layered transmission identifier described above can be reversed.

[0261] Furthermore, when the parameter of the aforementioned 4K signal transmission layer identifier indicates that 4K broadcast programs are transmitted using layer B, even if the aforementioned layer D transmission identifier bit indicates that layer B is used as a virtual layer D, the broadcast receiving device 100 can ignore the layer D transmission identifier bit. Similarly, when the parameter of the 4K signal transmission layer identifier indicates that 4K broadcast programs are transmitted using layer C, even if the layer E transmission identifier bit indicates that layer C is used as a virtual layer E, the broadcast receiving device 100 can ignore the layer E transmission identifier bit. By making the priority of the bits used in the decision-making process clear in this way, conflicts in the decision-making process within the broadcast receiving device 100 can be prevented.

[0262] Furthermore, in the transmitted broadcast wave, the bits of the frequency conversion processing identifier, the physical channel number identifier, the main signal identifier, the 4K signal transmission identifier, and the additional layered transmission identifier, etc., should be set to "1" if the parameter of the system identifier is not "10". Alternatively, even if the parameter of the system identifier is not "10", but due to some problem, the bits of the frequency conversion processing identifier, the physical channel number identifier, the main signal identifier, the 4K signal transmission identifier, and the additional layered transmission identifier are abnormally not "1", the broadcast receiving device 100 will ignore the non-"1" bits and determine that all bits are "1".

[0263] Furthermore, in advanced terrestrial digital broadcasting services using dual-polarization transmission, the TMCC information of the transmitted wave using horizontally polarized waves can be the same as or different from that of the transmitted wave using vertically polarized waves. Similarly, in advanced terrestrial digital broadcasting services using layered multiplexing transmission, the TMCC information of the transmitted wave transmitted from the upper layer can be the same as or different from that of the transmitted wave transmitted from the lower layer. Additionally, the parameters of the frequency conversion processing identifier, the parameters of the main signal identifier, and the additional layered transmission identifier, etc., can also be recorded only in the TMCC information of the transmitted wave transmitted using sub-polarized waves or the transmitted wave transmitted from the lower layer.

[0264] Furthermore, the above description illustrates an example of including the parameters of the frequency conversion processing identifier, the main signal identifier, the polarization direction identifier, the first signal and second signal identifiers, the upper and lower layer identifiers, the 4K signal transmission layer identifier, and the additional layered transmission identifier in the TMCC signal (TMCC carrier). However, these parameters can also be included in the AC signal (AC carrier). That is, these parameters can be used for signal transmission of a carrier modulated by a modulation scheme with fewer modulation state numbers than the data carrier (TMCC carrier, AC carrier, etc.).

[0265] [AC signal]

[0266] AC signals are supplementary information signals related to broadcasting, such as supplementary information regarding the transmission control of modulated waves or earthquake warning information. Earthquake warning information is transmitted using an AC carrier in segment 0. On the other hand, supplementary information regarding the transmission control of modulated waves can be transmitted using any AC carrier. Figure 6AThe diagram shows an example of the bit allocation for an AC signal. The AC signal consists of 204 bits (B0 to B203). B0 is the demodulation reference signal used for the AC symbol, with a defined 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.

[0267] exist Figure 6B The diagram shows an example of the bit allocation for the structure identifier of the AC signal. When transmitting earthquake alarm information using AC signal bits B4 to B203, this parameter is set to "001" or "110". The structure identifier parameter ("001" or "110") for transmitting earthquake alarm information is set to the same encoding as the first 3 bits (B1 to B3) of the TMCC signal's synchronization signal, and is transmitted alternately per frame according to the same timing as the TMCC signal. Alternatively, if this parameter is a value other than the above, it indicates that additional information regarding the transmission control of the modulated wave is being transmitted using AC signal bits B4 to B203. It is also possible to use AC signal bits B4 to B203 to transmit additional information regarding the transmission control of the modulated wave. In this case, the structure identifier parameter of the AC signal is transmitted alternately per frame using "000" and "111", or "010" and "101", or "011" and "100".

[0268] AC signal pins B4 to B203 are used to transmit additional information about the transmission control of the modulated wave or to transmit earthquake warning information.

[0269] The transmission of additional information regarding the transmission control of the modulated wave can be performed using various bit structures. For example, the frequency conversion processing identifier, physical channel number identifier, main signal identifier, 4K signal transmission layer identifier, and additional layer transmission identifier, as described in the TMCC signal specification, can be allocated and transmitted in the additional information regarding the transmission control of the modulated wave in the AC signal, either in place of the TMCC signal or outside of the TMCC signal. In this way, the broadcast receiving device 100 can use these parameters to perform various identification processes described in the TMCC signal specification. Furthermore, additional information regarding the transmission parameters of the 4K broadcast program's transmission layer can be allocated when a parameter of the 4K signal transmission layer identifier is "0," or current / successor information regarding the transmission parameters of the virtual D / virtual E layer can be allocated when a parameter of the additional layer transmission identifier is "0." Thus, the broadcast receiving device 100 can use these parameters to obtain the transmission parameters of each layer and control the demodulation processing of each layer.

[0270] Earthquake warning information can also be transmitted using Figure 6CThe bit allocation is as shown. Earthquake warning information consists of a synchronization signal, start / end flag, update flag, signal identifier, earthquake warning details, CRC, and parity bits. The synchronization signal is a 13-bit code, identical to the 13 bits (B4-B16) of the TMCC signal's synchronization signal, excluding the initial 3 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; it is the same 16-bit synchronization word as the TMCC signal. The start / end flag, serving as the start / end time indicator for earthquake warning information, is a 2-bit code. The start / end flag changes from "11" to "00" at the start of earthquake warning information transmission and changes from "00" to "11" at the end. The update flag is a 2-bit code; when the start / end flag is "00", it increments by "1" each time a change occurs in the content of a series of transmitted earthquake warning details, starting from "00". It returns to "00" after "11". If the start / end flag is "11", the update flag is also "11".

[0271] exist Figure 6D The diagram shows an example of the bit allocation for the signal identifier. The signal identifier consists of a 3-bit code used to identify the type of earthquake warning details. When the parameter is "000", it indicates "Earthquake warning details (corresponding area exists)". When the parameter is "001", it indicates "Earthquake warning details (no corresponding area exists)". When the parameter is "010", it indicates "Test signal of earthquake warning details (corresponding area exists)". When the parameter is "011", it indicates "Test signal of earthquake warning details (no corresponding area exists)". When the parameter is "111", it indicates "No earthquake warning details exist". Additionally, when the start / end flag is "00", the signal identifier is "000", "001", "010", or "011". When the start / end flag is "11", the signal identifier is "111".

[0272] Earthquake alert details consist of 88 bits of encoding. When the signal identifier is "000", "001", "010", or "011", the earthquake alert details transmit information about the current time the earthquake alert was sent, the region targeted by the earthquake alert, and the latitude / longitude / intensity of the epicenter of the earthquake targeted by the alert. Figure 6EThe image shows an example of the bit allocation for earthquake alarm details when the signal identifier is "000", "001", "010", or "011". Additionally, when the signal identifier is "111", the bits of the earthquake alarm details can be used to transmit codes used to identify broadcast operators, etc. Figure 6F The image shows an example of the bit allocation for earthquake alarm details when the signal identifier is "111".

[0273] CRC is the encoding of bits B21 to B111 in the earthquake warning information, generated using a specified generator polynomial. Parity bits are the encoding of bits B17 to B121 in the earthquake warning information, generated using a shortened encoding (187, 105) of difference cyclic encoding (273, 191).

[0274] In the broadcast receiver 100, it is possible to use Figure 6C , Figure 6D , Figure 6E , Figure 6F The parameters regarding earthquake alerts described herein enable various controls for responding to emergencies. For example, it allows control over displaying earthquake alert information, switching low-priority content to earthquake alert displays, and closing the application display and switching to earthquake alert or broadcast program footage.

[0275] exist Figure 6G The diagram illustrates an example of bit allocation for additional information regarding the transmission control of the modulated wave. This additional information consists of a synchronization signal, current information, successor information, and parity bits. The synchronization signal is a 13-bit code, identical to the 13 bits (B4-B16) of the TMCC signal's synchronization signal, excluding the first 3 bits. The AC signal's structure identifier, when transmitting additional information regarding the transmission control of the modulated wave, is a 16-bit code combining the structure identifier and the synchronization signal, conforming to the 16-bit synchronization word of the TMCC synchronization signal. The current information represents additional transmission parameter information for transmitting 4K broadcast programs using Layer B or Layer C, and current information regarding transmission parameters for Virtual Layer D or Virtual Layer E. The successor information represents additional transmission parameter information for transmitting 4K broadcast programs using Layer B or Layer C, and information after switching regarding transmission parameters for Virtual Layer D or Virtual Layer E.

[0276] Figure 6GIn the example, current information B18-B30 represents the current information of the B-layer transmission parameter supplementary information, indicating the current information of the transmission parameter supplementary information when transmitting 4K broadcast programs using the B-layer. Additionally, current information B31-B43 represents the current information of the C-layer transmission parameter supplementary information, indicating the current information of the transmission parameter supplementary information when transmitting 4K broadcast programs using the C-layer. Furthermore, subsequent information B70-B82 represents the information of the B-layer transmission parameter supplementary information after transmission parameter switching, indicating the information of the transmission parameter supplementary information after transmission parameter switching when transmitting 4K broadcast programs using the B-layer. Similarly, subsequent information B83-B95 represents the information of the C-layer transmission parameter supplementary information after transmission parameter switching, indicating the information of the transmission parameter supplementary information after transmission parameter switching when transmitting 4K broadcast programs using the C-layer. Here, transmission parameter supplementary information refers to... Figure 5C The transmission parameters of the TMCC information shown are extended with additional transmission parameters related to modulation. Details regarding these additional transmission parameters will be described later.

[0277] Figure 6G In the example, current information B44-B56 contains current information about the transmission parameters of the Virtual D layer when the Virtual D layer is applied. Current information B57-B69 contains current information about the transmission parameters of the Virtual E layer when the Virtual E layer is applied. Furthermore, subsequent information B96-B108 contains information about the transmission parameters of the Virtual D layer after switching when the Virtual D layer is applied. Current information B109-B121 contains 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 compared with... Figure 5C The same as shown.

[0278] Virtual D layer and virtual E layer are layers that do not exist in current terrestrial digital broadcasting. Figure 5B The TMCC information needs to maintain compatibility with existing terrestrial digital broadcasting, so increasing the bit count is not easy. Therefore, in embodiments of the present invention, instead of within the TMCC information, it is... Figure 6G The transmission parameters for the virtual D layer and the virtual E layer are stored in the AC information as shown.

[0279] Therefore, TMCC information can maintain compatibility with existing terrestrial digital broadcasting, while transmitting information about the modulation of the new virtual D layer and virtual E layer to the receiving device. Thus, when using the B / C layer of the transmission wave transmitted with the secondary polarization wave as the virtual D / E layer in the broadcast wave of the polarization-dual-use terrestrial digital broadcasting service of this embodiment, the transmission parameters of the virtual D / E layer of the transmission wave transmitted with the secondary polarization wave can be set to be different from the transmission parameters of the B / C layer of the transmission wave transmitted with the primary polarization wave.

[0280] Furthermore, if the virtual D layer or virtual E layer is not used, it is not a problem to ignore the transmission parameter information of the unused layer in the broadcast receiving device 100. For example, configured to handle the virtual D layer or virtual E layer, Figure 5J In the case where the parameter of the appended layered transport identifier in the TMCC information is "1" (indicating that the virtual D layer / virtual E layer is not used), regardless of whether the virtual D layer or the virtual E layer is not used... Figure 6G The broadcast receiver 100 can ignore whatever values ​​are stored in the transmission parameters shown.

[0281] Next, regarding Figure 6G The details of the additional information regarding the transmission parameters described herein will be explained.

[0282] exist Figure 6H The image shows a specific example of additional information for transmission parameters. This additional information can include parameters such as error correction methods and constellation parameters.

[0283] Error correction mode refers to the encoding method used for internal and external encoding error correction when transmitting 4K broadcast programs (Advanced Terrestrial Digital Broadcasting Service) using Layer B or Layer C. Figure 6I The diagram illustrates an example of bit allocation for error correction methods. When this parameter is "000", convolutional coding is used as the inner code and shortened RS coding as the outer code when transmitting 4K broadcast programs using Layer B or Layer C. When this parameter is "001", LDPC coding is used as the inner code and BCH coding as the outer code when transmitting 4K broadcast programs using Layer B or Layer C. Other combinations can also be set and selected.

[0284] Furthermore, when transmitting 4K broadcast programs using Layer B or Layer C, the carrier modulation mapping method can employ not only uniform constellations but also non-uniform constellations (NUC). Figure 6JAn example of a constellation-based bit allocation is shown. When the parameter is "000", a carrier modulation mapping method selected by the transmission parameters of the TMCC information is applied according to a uniform constellation. When the parameter is a value among "001" to "111", a carrier modulation mapping method 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 of the non-uniform constellation differs depending on the type of error correction method and its coding rate. Therefore, when the constellation-based parameter is a value among "001" to "111", the broadcast receiving device 100 of this embodiment determines the non-uniform constellation to be used in the demodulation process based on the parameters of the carrier modulation mapping method, the parameters of the error correction method, and its coding rate. This determination is made by the broadcast receiving device 100 referring to a pre-stored prescribed table, etc.

[0285] [Transmission Method 1 for Advanced Terrestrial Digital Broadcasting Services]

[0286] To maintain the audiovisual environment of existing terrestrial digital broadcasting services while simultaneously enabling 4K (3840 pixels horizontally × 2160 pixels vertically) broadcasting, a polarization-based dual-use transmission method will be described as an example of an advanced terrestrial digital broadcasting service transmission method according to an embodiment of the present invention. The polarization-based dual-use transmission method of the present invention is a method that makes some specifications common to existing terrestrial digital broadcasting methods. For example, 13 segments within a frequency band of approximately 6MHz, equivalent to one physical channel, are divided, with 7 segments allocated for transmitting 2K (1920 pixels horizontally × 1080 pixels vertically) broadcast programs, 5 segments allocated for transmitting 4K broadcast programs, and 1 segment allocated for mobile reception (so-called single-segment broadcasting). Furthermore, the 5 segments used for 4K broadcasting use both horizontally and vertically polarized wave signals, and MIMO (Multiple-Input Multiple-Output) technology ensures a total transmission capacity of 10 segments. Furthermore, for 2K broadcast programs, image quality is maintained through optimizations using the latest MPEG-2 Video compression technology, ensuring it can be received by existing television receivers. For 4K broadcast programs, image quality is guaranteed through optimizations using HEVC compression technology, which is more efficient than MPEG-2 Video, and modulation devaluation. Additionally, the number of segments allocated to each broadcast can differ from the above.

[0287] exist Figure 7AThis illustration shows an example of a polarization-based dual-use transmission method in an advanced terrestrial digital broadcasting service according to an embodiment of the present invention. The transmission of broadcast waves for the terrestrial digital broadcasting service uses a frequency band of 470–710 MHz. The number of physical channels in this frequency band is 40 channels, ranging from 13 to 52, each with a bandwidth of 6 MHz. In the polarization-based dual-use transmission method of this embodiment, both horizontally polarized and vertically polarized wave signals are used within a single physical channel.

[0288] exist Figure 7A In the example, examples (1) and (2) illustrate the allocation of 13 segments. In example (1), segments 1-7 (B layer) of the horizontally polarized wave signal are used for the transmission of 2K broadcast programs. A total of 10 segments (8-12 (C layer) of both the horizontally polarized wave signal and the vertically polarized wave signal) are used for the transmission of 4K broadcast programs. Segments 1-7 (B layer) of the vertically polarized wave signal can also be used to transmit the same broadcast programs as the 2K broadcast programs transmitted using segments 1-7 (B layer) of the horizontally polarized wave signal. Alternatively, segments 1-7 (B layer) of the vertically polarized wave signal can be used to transmit broadcast programs different from the 2K broadcast programs transmitted using segments 1-7 (B layer) of the horizontally polarized wave signal. Alternatively, segments 1-7 (B layer) of the vertically polarized wave signal can be used for other data transmissions, or they can be left unused. Using the identification information of segments 1 to 7 (B layers) of the vertically polarized wave signal, the parameters of the 4K signal transmission layer identifier of the TMCC signal, as described above, and the parameters of the additional layer transmission identifier, can be transmitted to the receiving device. In the broadcast receiving device 100, these parameters can be used to identify the processing of segments 1 to 7 (B layers) 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 horizontal and vertically polarized wave signals can be simultaneously broadcast with the same content at different resolutions, or broadcast programs with different content can be transmitted. Segment 0 of both horizontal and vertically polarized wave signals is used for the transmission of the same single-segment broadcast program.

[0289] Figure 7AExample (2) is a variation of (1). In example (2), 10 segments (segments 1-5 of the horizontally polarized wave signal, layer B) and 1-5 of the vertically polarized wave signal, are used for the transmission of 4K broadcast programs. Segments 6-12 of the horizontally polarized wave signal, layer C, are used for the transmission of 2K broadcast programs. In example (2), segments 6-12 of the vertically polarized wave signal, layer C, can also be used to transmit the same broadcast program as the 2K broadcast program transmitted using segments 6-12 of the horizontally polarized wave signal, layer C. Segments 6-12 of the vertically polarized wave signal, layer C, can also be used to transmit broadcast programs different from the 2K broadcast programs transmitted using segments 6-12 of the horizontally polarized wave signal, layer C. In addition, segments 6-12 of the vertically polarized wave signal, layer C, can also be used for other data transmissions, or they can be left unused. The identification information is the same as in example (1), so it will not be explained again.

[0290] in addition, Figure 7A Examples (1) and (2) illustrate cases where the horizontally polarized wave is the dominant polarized wave, but depending on the application, the horizontally polarized wave can also be the opposite of the vertically polarized wave.

[0291] exist Figure 7B An example of the structure of a broadcasting system for an advanced terrestrial digital broadcasting service using a polarization-dual-mode transmission method according to an embodiment of the present invention is shown. The systems of the transmitter and receiver for the advanced terrestrial digital broadcasting service using the polarization-dual-mode transmission method are also shown. The structure of the broadcasting system for the advanced terrestrial digital broadcasting service using the polarization-dual-mode transmission method is substantially the same as... Figure 1 The broadcasting systems shown have the same structure, but the radio tower 300T, which serves as the broadcasting station, is a shared polarization transmitting antenna capable of simultaneously transmitting horizontally polarized and vertically polarized wave signals. Additionally, Figure 7B In the example, only the station selection / detection section 131H and station selection / detection section 131V of the second modulation / demodulation section 130T are described for the broadcast receiving device 100, and the description of other operating parts is omitted.

[0292] The horizontally polarized wave signal transmitted from radio tower 300T is received by the horizontally polarized wave receiving element of antenna 200T (a common polarization receiving antenna), and input to the selection / detection unit 131H via coaxial cable 202T1 through connector section 100F1. On the other hand, the vertically polarized wave signal transmitted from radio tower 300T is received by the vertically polarized wave receiving element of antenna 200T, and input to the selection / detection unit 131V via coaxial cable 202T2 through connector section 100F2. An F-type connector is generally used as the connector for connecting the antenna (coaxial cable) to the television receiver.

[0293] Here, there is also a possibility that the user might mistakenly connect coaxial cable 202T1 to connector 100F2 or coaxial cable 202T2 to connector 100F1. In this case, there is a possibility that the selection / detection unit 131H and selection / detection unit 131V may fail to identify whether the input broadcast signal is a horizontally polarized wave signal or a vertically polarized wave signal. To prevent such failures, it is advisable to make one of the connectors connecting the antenna (coaxial cable) to the television receiver, for example, the connector of coaxial cable 202T2 transmitting vertically polarized wave signals and connector 100F2, a connector of a different shape than the F-type connector of the connector of coaxial cable 202T1 transmitting horizontally polarized wave signals and connector 100F1. Alternatively, the control could be configured such that selection / detection units 131H and 131V respectively refer to the main signal identifier of the TMCC information of each input signal, thereby identifying whether the input broadcast signal is a horizontally polarized wave signal or a vertically polarized wave signal and operating accordingly.

[0294] exist Figure 7C The diagram illustrates an example of a different structure from the one described above for an advanced terrestrial digital broadcasting service system employing a polarization-based dual-mode transmission method according to embodiments of the present invention. For example... Figure 7B The structure shown, where the broadcast receiver 100 has two connectors for broadcast signal input and uses two coaxial cables for connecting the antenna 200T to the broadcast receiver 100, is not necessarily optimal in terms of equipment cost and cable routing. Therefore, in Figure 7C In the illustrated structure, 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 the converter 201T. A coaxial cable 202T3 connects the converter 201T to the broadcast receiving device 100. The broadcast signal input from the connector 100F3 is split and input to the station selection / detection unit 131H and the station selection / detection unit 131V. The connector 100F3 may also supply operating power to the converter 201T.

[0295] The conversion unit 201T can also be used in environments where the broadcast receiving device 100 is installed (e.g., in a residential building). Alternatively, it can be integrated with the antenna 200T and installed in a residence. The conversion unit 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. Through this processing, the horizontally polarized wave signal and the vertically polarized wave signal transmitted from the radio tower 300T to the antenna 200T using the same frequency band are separated into different frequency bands, allowing simultaneous transmission to the broadcast receiving device 100 using a single coaxial cable 202T3. Alternatively, if necessary, frequency conversion processing can 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 must also be different. Furthermore, the broadcast receiving device 100 only needs to include one broadcast signal input connector 100F3.

[0296] exist Figure 7D An example of frequency conversion processing is shown. In this example, frequency conversion processing is performed on a vertically polarized wave signal. Specifically, the frequency band of the vertically polarized wave signal, which is transmitted in the 470–710 MHz band (equivalent to the 13-52 ch band of UHF), is converted from the 470–710 MHz band to the 770–1010 MHz band. This processing allows for the simultaneous transmission of both horizontally polarized and vertically polarized wave signals using the same frequency band to the broadcast receiver 100 via a single coaxial cable 202T3 without interference. Alternatively, frequency conversion processing can also be performed on the horizontally polarized wave signal.

[0297] Furthermore, frequency conversion processing is preferably performed on signals transmitted using sub-polarized waves, corresponding to the result of the main signal identifier referenced in the TMCC information. For example, using... Figure 5H As explained, signals transmitted using the primary polarization wave are more likely to be transmitted under existing terrestrial digital broadcasting services compared to signals transmitted using the secondary polarization wave. Therefore, to better maintain compatibility with existing terrestrial digital broadcasting services, it is preferable not to perform frequency conversion on signals transmitted using the primary polarization wave, but to perform frequency conversion on signals transmitted using the secondary polarization wave.

[0298] Furthermore, when frequency conversion is performed on a signal transmitted using a sub-polarized wave, it is preferable that the bandwidth of the signal transmitted using the sub-polarized wave in the converted signal is higher than the bandwidth of the signal transmitted using the primary polarized wave. Therefore, during the initial scan of the broadcast receiving device 100, by scanning from the low-frequency side to the high-frequency side, an initial scan can be performed on the signal transmitted using the primary polarized wave before the signal transmitted using the sub-polarized wave. This allows for better processing of initial scan settings that reflect current terrestrial digital broadcasting service settings when applied to advanced terrestrial digital broadcasting services.

[0299] In addition, frequency conversion processing can be performed on all physical channels used in advanced terrestrial digital broadcasting services, or only on physical channels that use signal transmission based on polarization-based dual-mode transmission.

[0300] Furthermore, the frequency band transformed by the frequency conversion process is preferably set between 710 and 1032 MHz. That is, when simultaneously receiving terrestrial digital broadcasting services and BS / CS digital broadcasting services, it is considered 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 them to the broadcast receiving device 100 through a single coaxial cable. In this case, since the BS / CS-IF signal uses a frequency band of 1032 to 2150 MHz, setting the frequency band transformed by the frequency conversion process to between 710 and 1032 MHz can avoid interference between horizontally polarized wave signals and vertically polarized wave signals, as well as interference between the broadcast signal of the terrestrial digital broadcasting service and the broadcast signal of the BS / CS digital broadcasting service. Furthermore, considering the reception of broadcast signals relayed from cable television (Community Antenna TV or Cable TV: CATV) stations, since cable television broadcasts use frequency bands below 770MHz (equivalent to frequency bands below 62ch in UHF), it is more preferable to set the frequency band transformed by frequency conversion processing to be between 770 and 1032MHz, which is above the frequency band equivalent to 62ch in UHF.

[0301] Furthermore, the bandwidth of the region between the frequency band before and after frequency conversion (part a in the figure) is preferably set to an integer multiple of the bandwidth of one physical channel (6MHz). This provides advantages such as ease of frequency setting and control when the broadcast receiving device 100 performs frequency scanning on both the broadcast signal from the frequency band before and after frequency conversion.

[0302] Furthermore, as described above, in the polarization-based dual-use transmission method of the embodiments 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, the receiver needs to accurately know the combination of the physical channels of the broadcast signal transmitted using horizontal polarization and the broadcast signal transmitted using vertical polarization. Even when frequency conversion processing is performed and the broadcast signal transmitted using horizontal polarization and the broadcast signal transmitted using vertical polarization, both on the same physical channel, are input to the receiving device as signals in different frequency bands, the broadcast receiving device 100 of this embodiment can still accurately determine the physical channel by appropriate reference. Figures 5F to 5J By using the parameters of the TMCC information shown (such as the main signal identifier and physical channel number identifier), the combination of broadcast signals transmitted with horizontally polarized waves and broadcast signals transmitted with vertically polarized waves on the same physical channel can be accurately determined. Therefore, the broadcast receiving apparatus 100 of this embodiment can appropriately receive, demodulate, and reproduce 4K broadcast programs.

[0303] in addition, Figure 7B , Figure 7C , Figure 7D The examples illustrate cases where the horizontally polarized wave is the dominant polarized wave, but depending on the application, the horizontally polarized wave can also be the opposite of the vertically polarized wave.

[0304] Furthermore, the terrestrial digital broadcast waves transmitted using the polarization-dual-mode transmission method described above can be received and reproduced by the second modem 130T of the broadcast receiver 100, as described above, but can also be received by the first modem 130C of the broadcast receiver 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 in the broadcast signal of the terrestrial digital broadcast waves, but the broadcast signals transmitted using the current terrestrial digital broadcast service layer are reproduced.

[0305] <Direct transmission method for advanced terrestrial digital broadcasting services>

[0306] The broadcast receiver 100 is capable of receiving signals transmitted in a direct transmission mode. Direct transmission mode is a method used by cable television stations and other similar organizations to transmit received broadcast signals to the CATV broadcasting system while maintaining the original signal format and at the same frequency or with frequency conversion.

[0307] The direct transmission methods include (1) extracting and adjusting the transmission signal frequency band of the ground digital broadcast signals output from the terrestrial wave receiving antenna and transmitting them to the CATV facility at the same frequency as the transmission signal frequency, and (2) extracting and adjusting the transmission signal frequency band of the ground digital broadcast signals output from the terrestrial wave receiving antenna and transmitting them to the CATV facility at the frequency set by the CATV facility manager in the VHF, MID, SHB, or UHF band. The receiving amplifier constituting the signal processing for performing the first method above, or the receiving amplifier and frequency converter constituting the signal processing for performing the second method above, is an OFDM signal processor (OFDM-SP).

[0308] exist Figure 7E The diagram illustrates an example of a system architecture in the case of the first method described above, which utilizes a direct transmission method for advanced terrestrial digital broadcasting services employing both polarization-based and dual-purpose transmission. Figure 7E The image shows the headend equipment 400C of a cable television station and the broadcast receiving device 100. Additionally, in... Figure 7F This illustrates an example of frequency conversion processing at this time. Figure 7F The (H·V) designation indicates that both broadcast signals transmitted using horizontally polarized waves and broadcast signals transmitted using vertically polarized waves exist in the same frequency band. (H) indicates a broadcast signal transmitted using horizontally polarized waves, and (V) indicates a broadcast signal transmitted using vertically polarized waves. The following... Figure 7H , Figure 7I The markings in the text have the same meaning.

[0309] In the case of applying the direct transmission of the first method in the advanced terrestrial digital broadcasting service using the dual-polarization transmission method of the embodiments of the present invention, for broadcast signals transmitted using horizontally polarized waves, signal bandwidth extraction and level adjustment are performed in the headend equipment 400C of the cable television station, and the signal is transmitted at the same frequency as the transmission signal. On the other hand, for broadcast signals transmitted using vertically polarized waves, signal bandwidth extraction and level adjustment are performed in the headend equipment 400C of the cable television station, and the signal is transmitted at the same frequency as the transmission signal. Figure 7DThe same frequency conversion process (converting the broadcast signal transmitted using vertically polarized waves to a higher frequency band than the 13ch-62ch band of UHF, i.e., the 470-770MHz band) is applied before transmission. Through this process, the frequency bands of the broadcast signal transmitted using horizontally polarized waves and the broadcast signal transmitted using vertically polarized waves no longer overlap, so signal transmission can be achieved using a single coaxial cable (or fiber optic cable). The transmitted signal can be received by the broadcast receiving device 100 of this embodiment. The process of receiving and demodulating the broadcast signal transmitted using horizontally polarized waves and the broadcast signal transmitted using vertically polarized waves included in the signal in the broadcast receiving device 100 of this embodiment is similar to... Figure 7D The explanation is the same, so I will omit it again.

[0310] exist Figure 7G The diagram illustrates an example of a system architecture for an advanced terrestrial digital broadcasting service using a direct transmission method, in which the second method described above is applied. Figure 7G The image shows the headend equipment 400C of a cable television station and the broadcast receiving device 100. Additionally, in... Figure 7H This illustrates an example of frequency conversion processing at this time.

[0311] In the case of applying the direct transmission of the second method in the advanced terrestrial digital broadcasting service using the dual-polarization transmission method of the embodiments of the present invention, for broadcast signals transmitted using horizontally polarized waves, signal bandwidth extraction and level adjustment are performed at the headend equipment 400C of the cable television station, and then transmitted after frequency conversion processing at the frequency set for the CATV facility manager. On the other hand, for broadcast signals transmitted using vertically polarized waves, signal bandwidth extraction and level adjustment are performed at the headend equipment 400C of the cable television station, and then transmitted after frequency conversion processing at the frequency set for the CATV facility manager. Figure 7D The same frequency conversion process (converting the broadcast signal transmitted using vertically polarized waves to a higher frequency band than the 13ch to 62ch band of UHF, i.e., the 470 to 770 MHz band) is applied before transmission. Figure 7H The frequency conversion processing shown is Figure 7FUnlike other methods, the broadcast signal transmitted using horizontally polarized waves is not retained in the UHF band of 13ch to 62ch (470 to 770 MHz). Instead, the frequency conversion is performed by expanding the range to a lower band and reconfiguring it within the 90 to 770 MHz range. Through this process, the frequency bands of the broadcast signal transmitted using horizontally polarized waves and the broadcast signal transmitted using vertically polarized waves no longer overlap, so signal transmission can be achieved using a single coaxial cable (or fiber optic 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 using horizontally polarized waves and the broadcast signal transmitted using vertically polarized waves included in the signal in the broadcast receiving device 100 of this embodiment is different from... Figure 7D The explanation is the same, so I will omit it again.

[0312] In addition, as Figure 7G Other variations of the frequency conversion processing in the headend equipment 400C of the cable television station can also convert the broadcast signal at the direct output after frequency conversion from... Figure 7H Change to Figure 7I The state shown is as follows. In this case, for both broadcast signals transmitted using horizontally polarized waves and broadcast signals transmitted using vertically polarized waves, signal bandwidth extraction and level adjustment are performed, and the signals are transmitted after frequency conversion processing at the frequency set for the CATV facility manager. Figure 7I In the example, for both broadcast signals transmitted using horizontally polarized waves and those transmitted using vertically polarized waves, frequency conversion is performed by reconfiguring within the range of 90–770 MHz (from VHF 1ch to UHF 62ch), without using frequency bands exceeding UHF 62ch. Therefore, the bandwidth utilization efficiency of the broadcast signal is higher than that of the UHF 62ch signal. Figure 7H higher.

[0313] Furthermore, compared to the UHF band of 13ch to 52ch (470 to 710 MHz) during antenna reception, the reconfigured broadcast signal band is wider, so... Figure 7I As shown in the example, it is possible to alternately reconfigure broadcast signals transmitted with horizontally polarized waves and broadcast signals transmitted with vertically polarized waves. At this time, as... Figure 7I As shown in the example, if the broadcast signals transmitted by horizontally polarized waves and broadcast signals transmitted by vertically polarized waves, which are originally on the same physical channel when received by the antenna, are alternately reconfigured according to the physical channel order when received by the antenna, then when the broadcast receiving device 100 of this embodiment performs an initial scan from the low frequency side, it is possible to perform an initial setting for the broadcast signals transmitted by horizontally polarized waves and broadcast signals transmitted by vertically polarized waves, which were originally on the same physical channel, in the same physical channel unit, and to perform an initial scan efficiently.

[0314] in addition, Figure 7E , Figure 7F , Figure 7G , Figure 7H and Figure 7I The examples illustrate cases where the horizontally polarized wave is the dominant polarized wave, but depending on the application, the horizontally polarized wave can also be the opposite of the vertically polarized wave.

[0315] Furthermore, regarding the terrestrial digital broadcasting waves using the direct transmission method and polarization-based dual-mode transmission method described above, as mentioned above, they can be received and reproduced by the second modem 130T of the broadcast receiver 100, but they can also be received by the first modem 130C of the broadcast receiver 100. When the terrestrial digital broadcasting waves are received by the first modem 130C, the broadcast signals transmitted using the advanced terrestrial digital broadcasting service layer are ignored in the broadcast signal of the terrestrial digital broadcasting waves, but the broadcast signals transmitted using the current terrestrial digital broadcasting service layer are reproduced.

[0316] [Transmission Method 2 for Advanced Terrestrial Digital Broadcasting Services]

[0317] To maintain the audiovisual environment of existing terrestrial digital broadcasting services while simultaneously enabling 4K broadcasting, a different example of the advanced terrestrial digital broadcasting service transmission method described in this invention is a layered multiplexing transmission method. The layered multiplexing transmission method of this invention is one that makes some specifications common to existing terrestrial digital broadcasting methods. For example, the broadcast wave of the existing 2K broadcasting service is multiplexed in the same channel as the broadcast wave of the 4K broadcasting service, which has a low signal level. Furthermore, for 2K broadcasting, the reception level of 4K broadcasting is suppressed to below the necessary C / N ratio, and reception is performed in the same way as existing methods. For 4K broadcasting, transmission capacity is increased through modulation multi-valued methods, and simultaneously, receiving technology supporting LDM (Layered Multiplexing) is used to cancel out the 2K broadcast wave, receiving the remaining 4K broadcast wave.

[0318] exist Figure 8A This illustration shows an example of a layered multiplexing transmission method in an advanced terrestrial digital broadcasting service according to an embodiment of the present invention. The upper layer is constructed using the modulation wave of conventional 2K broadcasting, and the lower layer is constructed using the modulation wave of 4K broadcasting. The upper and lower layers are multiplexed to produce a composite output. For example, a structure using 64QAM or similar modulation schemes in the upper layer and 256QAM or similar modulation schemes in the lower layer can be used. Furthermore, the 2K broadcast program transmitted in the upper layer and the 4K broadcast program transmitted in the lower layer can be simultaneously broadcasting the same content at different resolutions, or they can be broadcasting different content.

[0319] exist Figure 8BThe diagram illustrates an example of the structure of an advanced terrestrial digital broadcasting service using a layered multiplexing transmission method according to an embodiment of the present invention. The structure of the broadcasting system for the advanced terrestrial digital broadcasting service using the layered multiplexing transmission method is essentially the same as... Figure 1 The broadcast systems shown have the same structure, but the radio tower 300L, which serves as the broadcast station equipment, is the transmitting antenna for transmitting broadcast signals that multiplex the upper-level 2K broadcast with the lower-level 4K broadcast. Additionally, Figure 8B In the example, only the station selection / detection section 131L of the third modulation and demodulation section 130L is described for the broadcast receiving device 100, and the description of other operating parts is omitted.

[0320] The broadcast signal received by antenna 200L is input to the selection / detector 131L from connector 100F4 via converter 201L and coaxial cable 202L. Here, when the broadcast signal is transmitted from antenna 200L to broadcast receiving device 100 using the above structure, as follows... Figure 8C As shown, frequency conversion and amplification processing of the broadcast signal can also be performed in the conversion unit 201L. That is, when an antenna 200L is installed on the roof of an apartment building or the like, and a long coaxial cable 202L is used to transmit broadcast signals to the broadcast receiving devices 100 in each room, the broadcast signal will attenuate. It is considered that there is a possibility that a fault may occur in the station selection / detection unit 131L, which is particularly unable to correctly receive the 4K broadcast wave from the lower floor.

[0321] Therefore, to prevent the aforementioned faults, the conversion unit 201L performs frequency conversion amplification processing on the lower-layer 4K broadcast signal. This frequency conversion amplification process transforms the frequency band of the lower-layer 4K broadcast signal from the 470–710 MHz band (equivalent to UHF 13ch–52ch) to, for example, the 770–1010 MHz band, exceeding the equivalent of UHF 62ch. Furthermore, it amplifies the lower-layer 4K broadcast signal to a signal level where attenuation in the cable is not a problem. By performing this processing, interference between the 2K and 4K broadcast signals can be avoided, as well as the attenuation of the broadcast signal during coaxial cable transmission. Additionally, if the coaxial cable 202L is short and attenuation is not a problem, the conversion unit 201L and the frequency conversion amplification processing may not be necessary.

[0322] Furthermore, the frequency band after frequency conversion amplification is preferably set to between 710 and 1032 MHz, which is greater than the 52-channel UHF band, or between 770 and 1032 MHz, which is greater than the 62-channel UHF band (in cases such as when relayed by a cable television station). The bandwidth of the area between the frequency band before and after frequency conversion amplification is preferably set to an integer multiple of the bandwidth of one physical channel (6 MHz). Frequency conversion amplification can be performed only on physical channels that use signal transmission based on layered multiplexing transmission, etc. These are the same as the description of frequency conversion in this embodiment that has already been explained, so they are omitted again.

[0323] Furthermore, the broadcast receiving device 100 of this embodiment can be used with Figure 5H The upper and lower layer identifier bits of the TMCC information described herein identify whether the received broadcast signal is a broadcast signal transmitted from the lower layer or a broadcast signal transmitted from the upper layer. Furthermore, the broadcast receiving device 100 of this embodiment can use... Figure 5F The frequency conversion processing identifier bit of the TMCC information described herein identifies whether the received broadcast signal is a broadcast signal that has undergone frequency conversion after being received by the antenna. Furthermore, the broadcast receiving device 100 of this embodiment can use... Figure 5I The 4K signal transmission layer identifier bits in the TMCC information described herein identify whether the received broadcast signal is used for 4K program transmission at the lower layer. These identification processes can be performed by demodulating the data carrier and referring to the control information included in the stream, but this requires demodulation of the data carrier, making the process complex. Identification based on the parameters of the aforementioned TMCC information is simpler and faster, thus enabling, for example, faster initial scanning of the broadcast receiving device 100.

[0324] Furthermore, the station selection / detection section 131L of the third modulation / demodulation section 130L of the broadcast receiving device 100 in this embodiment of the invention, as described above, has a receiving function that supports LDM (Layered Multiplexing) technology. Therefore, it is not necessarily necessary to have a connection between the antenna 200L and the broadcast receiving device 100. Figure 8C The transformation unit 201L shown.

[0325] Furthermore, the terrestrial digital broadcast waves transmitted using the layered multiplexing transmission method described above can be received and reproduced by the third modem 130L of the broadcast receiver 100, as described above, but can also be received by the first modem 130C of the broadcast receiver 100. When the terrestrial digital broadcast waves are received by the first modem 130C, the broadcast signals transmitted using the layer of the advanced terrestrial digital broadcast service are ignored, but the broadcast signals transmitted using the layer of the current terrestrial digital broadcast service are reproduced.

[0326] [MPEG-2TS method]

[0327] The broadcast system in this embodiment supports MPEG-2TS as the media transmission method for transmitting video and audio data, as used in current terrestrial digital broadcasting services. Specifically, using... Figure 4D The OFDM transmission stream of (1) is MPEG-2TS. Figure 4D (2) and Figure 4D In (3), the OFDM transmission wave of the stream that transmits the current terrestrial digital broadcasting service is transmitted in the manner of MPEG-2TS. Additionally, the stream obtained by demodulating the transmission wave using the first modem 130C of the broadcast receiving apparatus 100 in FIG2 is MPEG-2TS. Furthermore, the stream obtained by demodulating the transmission wave using the second modem 130T, which corresponds to the current terrestrial digital broadcasting service, is MPEG-2TS. Similarly, the stream obtained by demodulating the transmission wave using the third modem 130L, which corresponds to the current terrestrial digital broadcasting service, is MPEG-2TS.

[0328] MPEG-2TS is characterized by multiplexing the video and audio components that make up a program, along with control signals and clock signals, into a single packet stream. Because the clock signal is included as a single packet stream, it is suitable for transmitting one piece of content using a single channel to ensure transmission quality, and is used in most current digital broadcasting systems. Furthermore, it enables bidirectional communication via fixed / mobile networks, supporting broadcast communication collaboration systems that combine digital broadcasting services with broadband network capabilities, processing of additional content obtained via broadband networks and server devices, and presentation processing through collaboration with portable terminal devices.

[0329] exist Figure 9A The image shows an example of a protocol stack for transmitting signals in a broadcast system using MPEG-2TS. In MPEG-2TS, PSI and SI, other control signals, etc., are transmitted in section format.

[0330] [Control signals for broadcast systems using MPEG-2TS]

[0331] As control information in the MPEG-2TS format, it mainly consists of tables used in program arrangement information and tables used outside of program arrangement information. Tables are transmitted in section format, and descriptors are configured within the tables.

[0332] <Tables used in program arrangement information>

[0333] exist Figure 9BThe table shown is an overview of the tables used in the program arrangement information of an MPEG-2TS broadcast system. In this embodiment, the table shown below is used as the program arrangement information.

[0334] (1)PAT (Program Association Table)

[0335] (2)CAT(ConditionalAccess Table)

[0336] (3) PMT (Program Map Table)

[0337] (4)NIT (Network Information Table)

[0338] (5)SDT (Service Description Table)

[0339] (6)BAT (Bouquet Association Table)

[0340] (7)EIT (Event Information Table)

[0341] (8) RST (Running Status Table)

[0342] (9) TDT (Time and Date Table)

[0343] (10) TOT (Time Offset Table)

[0344] (11)LIT (Local Event Information Table)

[0345] (12) ERT (Event Relation Table)

[0346] (13)ITT(Index Transmission Table)

[0347] (14)PCAT (Partial Content Announcement Table)

[0348] (15)ST (Stuffing Table)

[0349] (16)BIT (Broadcaster Information Table)

[0350] (17)NBIT (Network Board Information Table)

[0351] (18)LDT(Linked Description Table)

[0352] (19) AMT (Address Map Table)

[0353] (20)INT(IP / MAC Notification Table)

[0354] (21) Tables set by the operator

[0355] <Tables used in digital broadcasting>

[0356] exist Figure 9C The table shown is a list of tables used in a broadcast system other than program arrangement information in the MPEG-2TS format. In this embodiment, the table shown below is used as a table used in addition to program arrangement information.

[0357] (1)ECM (Entitlement Control Message)

[0358] (2)EMM (Entitlement Management Message)

[0359] (3)DCT (Download Control Table)

[0360] (4) DLT (Download Table)

[0361] (5)DIT (Discontinuity Information Table)

[0362] (6)SIT (Selection Information Table)

[0363] (7)SDTT(Software Download Trigger Table)

[0364] (8) CDT (Common Data Table)

[0365] (9) DSM-CC section

[0366] (10)AIT (Application Information Table)

[0367] (11)DCM (Download Control Message)

[0368] (12)DMM (Download Management Message)

[0369] (13) Tables set by the operator

[0370] <Descriptors used in program arrangement information>

[0371] exist Figure 9D and Figure 9E and Figure 9F The table shows a list of descriptors used in program arrangement information of an MPEG-2TS broadcast system. In this embodiment, the descriptors shown below are used as descriptors in the program arrangement information.

[0372] (1) Conditional Access Descriptor

[0373] (2) Copyright Descriptor

[0374] (3) Network Name Descriptor

[0375] (4) Service List Descriptor

[0376] (5) Stuffing Descriptor

[0377] (6) Satellite Delivery System Descriptor (7) Terrestrial Delivery System Descriptor (8) Bouquet Name Descriptor

[0378] (9) Service Descriptor

[0379] (10) Can countries accept the Country Availability Descriptor?

[0380] (11) Linkage Descriptor

[0381] (12) NVOD Reference Descriptor

[0382] (13) Time-Shifted Service Descriptor

[0383] (14) Short Event Descriptor

[0384] (15) Extended Event Descriptor

[0385] (16) Time-Shifted Event Descriptor

[0386] (17) Component Descriptor

[0387] (18) Mosaic Descriptor

[0388] (19) Stream Identifier Descriptor

[0389] (20) CA Identifier Descriptor

[0390] (21) Content Descriptor

[0391] (22) Parental Rating Descriptor

[0392] (23) Hierarchical Transmission Descriptor

[0393] (24) Digital Copy Control Descriptor

[0394] (25) Emergency Information Descriptor

[0395] (26) Data Component Descriptor

[0396] (27) System Management Descriptor

[0397] (28) Local Time Offset Descriptor

[0398] (29) Audio Component Descriptor

[0399] (30) Target Region Descriptor

[0400] (31) Hyperlink Descriptor

[0401] (32) Data Content Descriptor

[0402] (33) Video Decode Control Descriptor

[0403] (34) Basic Local Event Descriptor

[0404] (35) Reference Descriptor

[0405] (36) Node Relation Descriptor

[0406] (37) Short Node Information Descriptor (38) STC Reference Descriptor

[0407] (39) Partial Reception Descriptor

[0408] (40) Series Descriptor

[0409] (41) Event Group Descriptor

[0410] (42) SI Parameter Descriptor

[0411] (43) Broadcaster Name Descriptor

[0412] (44) Component Group Descriptor

[0413] (45) SIPrime TSDescriptor

[0414] (46) Board Information Descriptor

[0415] (47) LDT Linkage Descriptor

[0416] (48) Connected Transmission Descriptor

[0417] (49) TS Information Descriptor

[0418] (50) Extended Broadcaster Descriptor

[0419] (51) Logo Transmission Descriptor

[0420] (52) Content uses a descriptor (Content Availability Descriptor)

[0421] (53) Carousel Compatible Composite Descriptor

[0422] (54) Conditional Playback Descriptor

[0423] (55) AVC Video Descriptor

[0424] (56) AVC Timing and HRD Descriptor (57) Service Group Descriptor

[0425] (58) MPEG-4 Audio Descriptor

[0426] (59) MPEG-4 Audio Extension Descriptor

[0427] (60) Registration Descriptor

[0428] (61) Data Broadcast Id Descriptor

[0429] (62) Access Control Descriptor

[0430] (63) Area Broadcasting Information Descriptor

[0431] (64) Material Information Descriptor

[0432] (65) HEVC Video Descriptor

[0433] (66) Hierarchy Descriptor

[0434] (67) Hybrid Information Descriptor

[0435] (68) Scrambler Descriptor

[0436] (69) Descriptors set by the operator

[0437] <Descriptors used in digital broadcasting>

[0438] exist Figure 9G The diagram shows a list of descriptors used in a broadcast system in the MPEG-2TS format, in addition to program arrangement information. In this embodiment, the following descriptors are used as descriptors in addition to program arrangement information.

[0439] (1) Partial Transport Stream Descriptor

[0440] (2) Network Identification Descriptor

[0441] (3) Partial Transport Stream Time Descriptor

[0442] (4) Download Content Descriptor

[0443] (5) CA_EMM_TS_Descriptor

[0444] (6) CA Contract Information Descriptor

[0445] (7) CA Service Descriptor

[0446] (8) Carousel Identifier Descriptor

[0447] (9) Association Tag Descriptor

[0448] (10) Deferred Association Tags Descriptor (11) Network Download Content Descriptor (12) Download Protection Descriptor

[0449] (13) CA Startup Descriptor

[0450] (14) Descriptors set by the operator

[0451] <Descriptors used in INT>

[0452] exist Figure 9H The table shows a list of descriptors used in the INT of an MPEG-2TS broadcast system. In this embodiment, the descriptors shown below are used as descriptors in the INT. Furthermore, descriptors used in the program arrangement information and descriptors used outside of the program arrangement information are not used in the INT.

[0453] (1) Target Smartcard Descriptor

[0454] (2) Target IP Address Descriptor

[0455] (3) Target IPv6 Address Descriptor

[0456] (4) IP / MAC Platform Name Descriptor (5) IP / MAC Platform Provider Name Descriptor

[0457] (6) IP / MAC Stream Location Descriptor (7) Operator-defined descriptor

[0458] <Descriptors used in AIT>

[0459] exist Figure 9I The diagram shows a list of descriptors used in the AIT (Adaptive Interpreter Information) of an MPEG-2TS broadcast system. In this embodiment, the descriptors shown below are used as descriptors in the AIT. Furthermore, descriptors used in the program arrangement information described above, and descriptors used outside of the program arrangement information, are not used in the INT (Intent).

[0460] (1) Application Descriptor

[0461] (2) Transport Protocol Descriptor

[0462] (3) Simple Application Location Descriptor

[0463] (4) Application Boundary and Permission Descriptor

[0464] (5) Autostart Priority Descriptor

[0465] (6) Cache Control Info Descriptor

[0466] (7) Randomized Latency Descriptor

[0467] (8) External Application Control Descriptor

[0468] (9) Playback Application Descriptor

[0469] (10) Simple Playback Application Location Descriptor

[0470] (11) Application Expiration Descriptor

[0471] (12) Descriptors set by the operator

[0472] [MMT Method]

[0473] The broadcast system of this embodiment can also support MMT as a media transmission method for transmitting data such as video and audio. Specifically, Figure 4D (2) and Figure 4D In principle, the stream transmitted using the layer for advanced terrestrial digital broadcasting services in the OFDM transmission wave (3) is MMT. Similarly, the stream obtained by demodulating the transmission wave using the second modem 130T of the broadcast receiving device 100 in Figure 2, corresponding to the layer for advanced terrestrial digital broadcasting services, is also MMT. Likewise, the stream obtained by demodulating the transmission wave using the third modem 130L, corresponding to the layer for advanced terrestrial digital broadcasting services, is also MMT. Furthermore, as a variation, an MPEG-2TS stream can also be used in advanced terrestrial digital broadcasting services. Additionally, the stream obtained by demodulating the transmission wave using the fourth modem 130B is MMT.

[0474] MMT is a newly developed media transmission method because the MPEG-2TS method has reached its limits in response to the changing environment of content distribution in recent years, including the diversification of content, the diversification of devices using content, the diversification of channels for distributing content, and the diversification of content storage environments.

[0475] The video and audio signals of the broadcast program are encoded and transformed into MFU (Media Fragment Unit) / MPU (Media Processing Unit), loaded into MMTP (MMT Protocol) payloads, and then packetized using IP packets for transmission. Additionally, data content and subtitles related to the broadcast program are also converted into MFU / MPU format, loaded into MMTP payloads, packetized using MMTP, and transmitted using IP packets.

[0476] For MMTP packet transmission, UDP / IP (User Datagram Protocol / Internet Protocol) is used in the broadcast channel, while UDP / IP or TCP / IP (Transmission Control Protocol / Internet Protocol) is used in the communication line. Additionally, TLV multiplexing can be used in the broadcast channel for efficient transmission of IP packets.

[0477] exist Figure 10A The diagram shows the protocol stack of MMT in the broadcast channel. Additionally, in... Figure 10B The diagram illustrates the MMT protocol stack in a communication line. In MMT mode, mechanisms are used to prepare for the transmission of two types of control information: MMT-SI and TLV-SI. MMT-SI contains control information representing the structure of broadcast programs, etc. It is transformed into the format of MMT control messages, loaded into MMTP payloads, and then packetized using IP packets for transmission. TLV-SI contains control information regarding the multiplexing of IP packets, providing information for channel selection and the mapping between IP addresses and services.

[0478] [Control signals for broadcast systems using MMT]

[0479] As described above, in MMT mode, TLV-SI and MMT-SI are prepared as control information. TLV-SI consists of tables and descriptors. Tables are transmitted in section format, and descriptors are configured within tables. MMT-SI consists of three layers: messages that store tables and descriptors, tables with elements and attributes representing specific information, and descriptors representing more detailed information.

[0480] <Tables used in TLV-SI>

[0481] exist Figure 10C The table shown is a list of tables used in the TLV-SI of an MMT-based broadcast system. In this embodiment, the table shown below is used as the TLV-SI.

[0482] (1) TLV uses a Network Information Table (TIV).

[0483] (2) Address Map Table

[0484] (3) Tables set up by the operator

[0485] <Descriptors used in TLV-SI>

[0486] exist Figure 10D The table shows a list of descriptors used in the TLV-SI of an MMT-based broadcast system. In this embodiment, the following descriptors are used as TLV-SI descriptors.

[0487] (1) Service List Descriptor

[0488] (2) Satellite Delivery System Descriptor

[0489] (3) System Management Descriptor

[0490] (4) Network Name Descriptor

[0491] (5) Remote Control Key Descriptor

[0492] (6) Descriptors set by the operator

[0493] <Messages used in MMT-SI>

[0494] exist Figure 10E The table shows a list of messages used in the MMT-SI of an MMT-based broadcast system. In this embodiment, the messages shown below are used as MMT-SI messages.

[0495] (1) PA (Package Access) message

[0496] (2) M2 section message

[0497] (3) CA message

[0498] (4) M2 short message

[0499] (5) Data transmission message

[0500] (6) Messages set by the operator

[0501] <Tables used in MMT-SI>

[0502] exist Figure 10F The table shown is a list of tables used in the MMT-SI of the MMT-based broadcast system. In this embodiment, the table shown below is used as the MMT-SI table.

[0503] (1) MPT (MMT Package Table)

[0504] (2) PLT (Package List Table)

[0505] (3)LCT (Layout Configuration Table)

[0506] (4)ECM (Entitlement Control Message)

[0507] (5)EMM (Entitlement Management Message)

[0508] (6)CAT(MH)(Conditional Access Table(MH))

[0509] (7)DCM (Download Control Message)

[0510] (8)DMM (Download Management Message)

[0511] (9)MH-EIT (MH-Event Information Table)

[0512] (10)MH-AIT (MH-Application Information Table)

[0513] (11)MH-BIT (MH-Broadcaster Information Table)

[0514] (12)MH-SDTT(MH-Software Download Trigger Table)

[0515] (13)MH-SDT (MH-Service Description Table)

[0516] (14)MH-TOT(MH-Time Offset Table)

[0517] (15)MH-CDT(MH-Common Data Table)

[0518] (16)DDM table (Data Directory Management Table)

[0519] (17)DAM table (Data Asset Management Table)

[0520] (18)DCC table (Data Content Configuration Table)

[0521] (19) EMT (Event Message Table)

[0522] (20) Tables set up by the operator

[0523] <Descriptors used in MMT-SI>

[0524] exist Figure 10G and Figure 10H and Figure 10I The table shows a list of descriptors used in the MMT-SI of an MMT-based broadcast system. In this embodiment, the following descriptors are used as MMT-SI descriptors.

[0525] (1) Asset Group Descriptor

[0526] (2) Event Package Descriptor

[0527] (3) Background Color Descriptor

[0528] (4) MPU Presentation Region Descriptor

[0529] (5) MPU Timestamp Descriptor

[0530] (6) Dependency Descriptor

[0531] (7) Access Control Descriptor

[0532] (8) Scrambler Descriptor

[0533] (9) Message Authentication Method Descriptor

[0534] (10) Emergency Information Descriptor

[0535] (11) MH-MPEG-4 Audio Descriptor (12) MH-MPEG-4 Audio Extension Descriptor

[0536] (13) MH-HEVC Descriptor

[0537] (14) MH - Linkage Descriptor

[0538] (15) MH - Event Group Descriptor

[0539] (16) MH - Service List Descriptor

[0540] (17) MH - Short Event Descriptor

[0541] (18) MH - Extended Event Descriptor (19) Video Component Descriptor

[0542] (20) MH - Stream Identifier Descriptor

[0543] (21) MH - Content Descriptor

[0544] (22) MH - Parental Rating Descriptor (23) MH - Audio Component Descriptor

[0545] (24) MH - Target Region Descriptor

[0546] (25) MH-Series Descriptor

[0547] (26) MH-SI Parameter Descriptor

[0548] (27) MH - Broadcaster Name Descriptor (28) MH - Service Descriptor

[0549] (29) IP Data Flow Descriptor

[0550] (30) MH-CA Startup Descriptor

[0551] (31) MH-Type Descriptor

[0552] (32) MH-Info Descriptor

[0553] (33) MH-Expire Descriptor

[0554] (34) MH-Compression Type Descriptor

[0555] (35) MH - Data Component Descriptor (36) UTC-NPT Reference Descriptor

[0556] (37) Event Message Descriptor

[0557] (38) MH - Local Time Offset Descriptor

[0558] (39) MH - Component Group Descriptor

[0559] (40) MH-Logo Transmission Descriptor

[0560] (41) MPU Extended Timestamp Descriptor

[0561] (42) MPU Download Content Descriptor (43) MH - Network Download Content Descriptor

[0562] (44) Application Descriptor (MH)

[0563] (45) MH - Transport Protocol Descriptor

[0564] (46) MH - Simple Application Location Descriptor

[0565] (47) Application Boundary and Permission Descriptor (MH)

[0566] (48) MH - Autostart Priority Descriptor (49) MH - Cache Control Info Descriptor (50) MH - Randomized Latency Descriptor

[0567] (51) Linked PU Descriptor

[0568] (52) Locked Cache Descriptor

[0569] (53) Unlocked Cache Descriptor

[0570] (54) MH-Download Protection Descriptor

[0571] (55) Application Service Descriptor

[0572] (56) MPU Node Descriptor

[0573] (57) PU Structure Descriptor

[0574] (58) MH - Hierarchy Descriptor

[0575] (59) Content Copy Control Descriptor

[0576] (60) Content Usage Control Descriptor

[0577] (61) Emergency News Descriptor

[0578] (62) MH-CA Contract Info Descriptor

[0579] (63) MH-CA Service Descriptor

[0580] (64) MH - External Application Control Descriptor

[0581] (65) MH - Playback Application Descriptor

[0582] (66) MH - Simple Playback Application Location Descriptor

[0583] (67) MH - Application Expiration Descriptor

[0584] (68) Related Broadcaster Descriptor

[0585] (69) Multimedia Service Descriptor

[0586] (70) Descriptors set by the operator

[0587] <Relationship between data transmission and various control information in MMT mode>

[0588] exist Figure 10J The diagram shows the relationship between data transmission in an MMT-based broadcast system and a representative table.

[0589] In MMT-based broadcast systems, data can be transmitted via multiple paths, including TLV streams through broadcast channels and IP data streams through communication lines. The TLV stream includes TLV-SIs such as TLV-NIT and AMT, and IP packet data streams, i.e., IP data streams. The IP data stream contains video resources including a series of video MPUs and audio resources including a series of audio MPUs. Furthermore, it may also contain subtitle resources including a series of subtitle MPUs, overlay text resources including a series of overlay text MPUs, and data resources including a series of data MPUs. These various resources are associated with the MPT (MMT packet table) stored and transmitted in PA messages, on a packet-by-packet basis. Specifically, the packet ID is recorded in the MPT in association with the resource IDs of each resource included in that packet.

[0590] The resources constituting a packet can consist only of resources within the TLV stream, but can also be as follows: Figure 10J As shown, this includes resources transmitted via IP data streams over communication lines. This can be achieved by including the location information of each resource included in the packet within the MPT, enabling the broadcast receiving device 100 to determine the reference target of each resource. The location information for each resource can be specified as follows:

[0591] (1) Data multiplexed in the same IP data stream as MPT

[0592] (2) Data multiplexed in IPv4 data streams

[0593] (3) Data multiplexed in IPv6 data streams

[0594] (4) Data multiplexed in broadcast MPEG2-TS

[0595] (5) Data multiplexed in MPEG2-TS format within the IP data stream

[0596] (6) Data located at the specified URL

[0597] Various data transmitted using various transmission paths.

[0598] In MMT-based broadcasting systems, the concept of an event is introduced. An event is a concept representing a program, processed by MH-EIT and included in the M2 section message. Specifically, the data included in the event concept is a series of data within the packet indicated by the event packet descriptor stored in MH-EIT, spanning a period equivalent to the start time stored in MH-EIT. MH-EIT can be used in the broadcast receiving device 100 for various processing of this event unit (e.g., program schedule generation, recording and audiovisual reservation control, copyright management processing such as temporary storage, etc.).

[0599] [Channel setting processing for broadcast receivers]

[0600] <Initial Scan>

[0601] In current terrestrial digital broadcasting, network IDs are generally not recorded in the NIT (Network Information Center) based on the different sending units. Therefore, the broadcast receiving apparatus 100 of this embodiment of the invention, which is compatible with current terrestrial digital broadcasting, needs to have the functions of searching (scanning) all receivable channels at the receiving location and generating a service list (receivable frequency table) based on the service ID for terrestrial digital broadcasting (advanced terrestrial digital broadcasting, or terrestrial digital broadcasting that simultaneously transmits advanced terrestrial digital broadcasting and current terrestrial digital broadcasting at different layers) according to the terrestrial digital broadcasting of this embodiment of the invention. Furthermore, in areas where the same network ID can be received using different physical channels via MFN (Multi-Frequency Network), it is sufficient to operate by essentially selecting channels with good C / N or BER (Bit Error Rate) and storing them in the service list.

[0602] Furthermore, in the case of advanced BS digital broadcasts or advanced CS digital broadcasts received by the fourth modem 130B of the broadcast receiving apparatus 100 according to an embodiment of the present invention, the broadcast receiving apparatus 100 only needs to obtain and store the service list stored in the TLV-NIT, and it is not necessary to generate the service list. Therefore, for advanced BS digital broadcasts or advanced CS digital broadcasts received by the fourth modem 130B, there is no need for initial scanning and rescanning as described later.

[0603] <Rescan>

[0604] The broadcast receiving device 100 of this invention has a rescanning function for situations such as the opening of a new station, the setting of a new repeater station, and changes in the reception location of a television receiver. When previously set information is changed, the broadcast receiving device 100 can notify the user of the change.

[0605] <Examples of actions during initial / re-scanning>

[0606] exist Figure 11A The figure shows an example of the operation sequence of the channel setting process (initial / re-scan) of the broadcast receiving apparatus 100 according to an embodiment of the present invention. Additionally, the figure shows an example using MPEG-2TS as the media transmission method, but the process is essentially the same when using MMT.

[0607] In the channel setting process, firstly, 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 instruction (S101). Alternatively, the residential area can be set automatically based on the setting location information of the broadcast receiving device 100 obtained through a predetermined process, instead of the user's instruction. As an example of obtaining the setting location information, information can be obtained from the network connected to the LAN communication unit 121, or from an external device connected to the digital I / F unit 125. Next, an initial value for the scanned frequency range is set, and the modem (described as such without distinguishing between the first modem 130C, the second modem 130T, and the third modem 130L; the same applies below) is instructed to tune to the set frequency (S102).

[0608] The modem performs tuning based on the above instruction (S103). If it successfully locks onto the set frequency (S103: Yes), it proceeds to process S104. If it fails to lock onto the frequency (S103: No), it proceeds to process S111. In process S104, C / N verification is performed (S104). If a specified or higher C / N is obtained (S104: Yes), it proceeds to process S105 for reception verification. If a specified or higher C / N is not obtained (S104: No), it proceeds to process S111.

[0609] In 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 is valid data (S106). If the NIT obtained in S106 is valid data, the reception function control unit 1102 obtains information such as the transport stream ID and the original network ID from the NIT. Additionally, it obtains allocation system information regarding the physical conditions of the broadcast channel corresponding to each transport stream ID / original network ID from the ground allocation system descriptor. Furthermore, it obtains a list of service IDs from the service list descriptor.

[0610] Next, the receiving function control unit 1102 checks whether the transport stream ID obtained in the process of S106 has been obtained by verifying the service list stored in the receiving device (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 appended 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 when the transport stream ID recorded in the service list is obtained (S109). As a result, if the BER obtained in the process of S105 is better (S109: Yes), the service list is updated with the various 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.

[0611] Additionally, during the service list generation (addition / update) process described above, 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 single-press channel selection, as described later.

[0612] 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 modulation and demodulation unit is increased (S112), and the processes 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.

[0613] In the S113 process, the service list generated (added / updated) by the above process is presented to the user as the result of the channel setting process (S113). Additionally, if there are duplicate remote control button presses, the user can be notified 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.

[0614] exist Figure 11B The diagram illustrates an example of the NIT data structure. In the diagram, "transport_stream_id" corresponds to the transport stream ID mentioned above, and "original_network_id" corresponds to the original network ID. Additionally, in... Figure 11C The diagram illustrates an example of the data structure for a ground distribution system descriptor. The "guard_interval," "transmission_mode," and "frequency" values ​​in the diagram correspond to the aforementioned distribution system information. Figure 11D The diagram illustrates an example of the data structure for a service list descriptor. The "service_id" in the diagram corresponds to the service ID mentioned above. Figure 11E The diagram shows an example of the data structure for a TS information descriptor. The "remote_control_key_id" in the diagram corresponds to the remote control button ID mentioned above.

[0615] Furthermore, the broadcast receiving device 100 can also be controlled to appropriately change the frequency range of the scan in accordance with the received broadcast service. For example, when the broadcast receiving device 100 receives the broadcast wave of the current terrestrial digital broadcast service, it is controlled to scan the frequency range of 470 to 770 MHz (equivalent to 13ch to 62ch of physical channels). That is, the control is performed by setting the initial value of the frequency range to 470 to 476 MHz (center frequency 473 MHz), setting the final value of the frequency range to 764 to 770 MHz (center frequency 767 MHz), and increasing the frequency value by +6 MHz in the processing of S112.

[0616] Furthermore, when the broadcast receiver 100 receives broadcast waves including those from advanced terrestrial digital broadcasting services, it is controlled to scan the frequency range of 470–1010 MHz (because there is a frequency range that has been...). Figure 7D The frequency conversion processing shown and Figure 8C (The possibility of frequency conversion amplification processing is shown). That is, the control is performed by setting the initial value of the above frequency range to 470-476MHz (center frequency 473MHz), setting the final value of the frequency range to 1004-1010MHz (center frequency 1007MHz), and implementing a frequency value increase of +6MHz in the processing of S112. In addition, even if the broadcast receiving device 100 receives advanced terrestrial digital broadcasting service, if it is determined that the above frequency conversion processing and frequency conversion amplification processing have not been performed, the control is to only scan the frequency range of 470-770MHz. The selection control of the scanned frequency range can be performed by the broadcast receiving device 100 based on the system identifier and frequency conversion processing identifier of TMCC information, etc.

[0617] Furthermore, the broadcasting system of embodiments of the present invention is, for example, Figure 7C In the structure shown, when the broadcast receiver 100 receives advanced terrestrial digital broadcasting services using a dual-mode polarization transmission, one of the selection / detector units 131H and 131V can scan the frequency range of 470–770 MHz, while the other scans the frequency range of 770–1010 MHz (in the case where frequency conversion processing is performed on the transmitted wave in the polarization wave detected by the other selection / detector unit). If the system identifier and frequency conversion processing identifier based on TMCC information are controlled in this way, unnecessary scanning in the frequency range can be omitted, reducing the time required for channel setting. Furthermore, in this case, both the selection / detector units 131H and 131V can be used in parallel. Figure 11A The sequence of actions, making Figure 11A The frequency in the action sequence increases the loop synchronization of S112. At this time, if it is configured as follows: Figure 11A In a sequence of actions where the frequency increases, within a loop at the same moment, pairs of horizontally polarized and vertically polarized wave signals transmitted using the same physical channel are received in parallel. This allows for decoding within the packet stream of the Advanced Terrestrial Digital Service transmitted using these pairs of horizontally and vertically polarized wave signals during the loop processing. Therefore, efficient scanning and service list generation are possible, making this method preferable.

[0618] Similarly, the broadcast receiver 100 is in Figure 8BIn the structure shown, a so-called dual-tuner structure (e.g., a structure with multiple third modulation / demodulation units 130L) is further provided. When receiving advanced terrestrial digital broadcasting services using a layered multiplexing transmission method, one of the dual tuners can scan the frequency range of 470–770 MHz, and the other can scan the frequency range of 770–1010 MHz (in the case of frequency conversion amplification processing). If control is performed in this way, the time required for frequency setting can be reduced in the same way as described above.

[0619] In addition, such as Figure 8A , Figure 8B , Figure 8C As explained, Figure 8B In the illustrated structure, the terrestrial digital broadcasting service transmitted using either the upper or lower layer is the current terrestrial digital broadcasting service. Therefore, for example, in the frequency ranges of 470–770 MHz and 770–1010 MHz, the frequency range for transmitting the current terrestrial digital broadcasting service can be scanned using the first modem 130C, while the other frequency range can be scanned in parallel using the third modem 130L. In this case, the time required for channel setting can be reduced, similar to the parallel scanning performed using the dual tuners of the third modem 130L described above. Whether the current terrestrial digital broadcasting service or the advanced terrestrial digital broadcasting service is being transmitted in either the frequency range of 470–770 MHz or the frequency range of 770–1010 MHz, it can be determined by receiving the TMCC information transmitted at each frequency at two locations, one in each frequency range (e.g., 470–476 MHz (center frequency 473 MHz) and 770–776 MHz (center frequency 773 MHz), before starting the initial scan / re-scan action sequence. The TMCC information is then obtained by referring to the parameters stored in the TMCC information (e.g., parameters of the system identifier).

[0620] In addition, advanced terrestrial digital broadcasting services using dual-mode polarization transmission, for example, those with... Figure 7AIn the case of a 4K broadcast program in layer C, as shown in example (1), which is a typical broadcast program transmitted using both horizontally polarized and vertically polarized signals, the same transmission ID is detected in both the 470–770 MHz and 770–1010 MHz frequency ranges, but it is recorded as one channel in the service list. Similarly, in the case of a 2K broadcast program in layer B, as shown in the figure, if the same broadcast program is transmitted using both horizontally polarized and vertically polarized layer B signals, it is stored as one channel in the service list even if the same transmission ID is detected. That is, when the same broadcast program is transmitted in the same layer using different polarization signals, it is merged and identified as one channel, not as different channels. This avoids user confusion caused by identical broadcast programs appearing on different channels during channel selection using the service list.

[0621] In contrast, in advanced terrestrial digital broadcasting services using dual-polarization transmission, when different broadcast programs are transmitted using the B layer of the horizontally polarized wave signal and the B layer of the vertically polarized wave signal (the B layer of the vertically polarized wave signal is considered a virtual D layer), they are stored as different channels in the service list. Whether 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 can be determined in the broadcast receiving device 100 by referring to the additional layer transmission identifier parameters of the TMCC information.

[0622] [Channel selection processing for broadcast receivers]

[0623] The broadcast receiving device 100 of this invention has functions such as single-press channel selection using a remote control's single-press button, channel up / down channel selection using a remote control's channel up / down button, and direct channel selection by directly inputting a 3-digit number using the remote control's number keys, serving as program selection functions. These selection functions all utilize information stored in the service list generated during the initial / re-scan. Furthermore, after channel selection, information about the selected channel (the 3-digit number used for direct channel selection, sub-number, TS name, service name, logo, image resolution information (distinction between UHD, HD, and SD, etc.), whether image resolution up / down conversion was performed, number of channels, and whether audio downmixing was performed, etc.) is displayed on a banner or similar display. This allows the user to visually obtain information about the selected channel and confirm whether the desired channel has been successfully selected. An example of the processing in each channel selection method will be described below.

[0624] <Example of processing a single channel selection>

[0625] (1) Select the service with the "service_id" specified by "remote_control_key_id" by pressing a single button on the remote control.

[0626] (2) Set the final mode to display the channel information after channel selection.

[0627] <Example of channel selection using the up and down channel buttons>

[0628] (1) Select channels by pressing the channel up / down button on the remote control, using the 3-digit number sequence for direct channel selection.

[0629] (1-1) If the up button is pressed, select the service above with the 3-digit number. However, if the current 3-digit number is the maximum value in the service list, select the service with the minimum number.

[0630] (1-2) When the down button is pressed, the service next to the next 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.

[0631] (2) Set the final mode to display the channel information after channel selection.

[0632] <Example of Direct Channel Selection Processing>

[0633] (1) When direct channel selection is selected, the system will enter a state where a 3-digit number is required.

[0634] (2-1) If the input of the 3-digit number is not completed within the specified time (approximately 5 seconds), return to the normal mode and display the channel information of the currently selected service.

[0635] (2-2) If the input of the 3-digit number has been completed, check whether the channel exists in the service list of the receivable frequency table. If it does not exist, display a message such as "The channel does not exist".

[0636] (3) If a channel exists, perform channel selection, set the final mode, and display the channel information after channel selection.

[0637] In addition, the channel selection action is based on SI, and it can also have the function of displaying a message to notify the user when it is determined that the broadcast is paused.

[0638] <Remote control for broadcast receiver>

[0639] exist Figure 12A The diagram shows an example of the appearance of a remote controller used to input operation instructions to a broadcast receiving device 100 according to an embodiment of the present invention.

[0640] The remote control 180R has a power button 180R1 for turning the power ON / OFF (standby ON / OFF) of the broadcast receiver 100, cursor buttons (up, down, left, right) 180R2 for moving the cursor up, down, left, and right, a selection button 180R3 for determining the item at the cursor position as the selection item, and a return button 180R4.

[0641] Additionally, the remote controller 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 receiver 100. Furthermore, the remote controller 180R includes single-press buttons (1-12) 180R6 for single-press channel selection, channel up / down buttons 180R7 for channel up / down selection, and numeric keys for inputting a 3-digit number when directly selecting a channel. In the example shown, the numeric keys are also used as single-press buttons 180R6; when directly selecting a channel, a 3-digit number can be input by pressing the direct button 180R8 and then operating the single-press button 180R6.

[0642] In addition, the remote control 180R features an EPG button 180R9 for displaying the program guide and a menu button 180RA for displaying the system menu. The program guide and system menu can be operated in detail using the cursor button 180R2, the confirm button 180R3, and the return button 180R4.

[0643] In addition, the remote control 180R features a d button 180RB for data broadcasting and multimedia services, a collaboration button 180RC for displaying a list of broadcast communication collaboration services and their corresponding applications, and color buttons (blue, red, green, and yellow) 180RD. For data broadcasting, multimedia, and broadcast communication collaboration services, detailed operation can be performed using the cursor button 180R2, the confirm button 180R3, the return button 180R4, and the color buttons 180RD.

[0644] In addition, the remote control 180R has a video button 180RE for selecting associated video, a sound button 180RF for switching sound (ES) or switching between two languages, and a subtitle button 180RG for switching subtitles (ON / OFF) or switching subtitle languages. The remote control 180R also has volume buttons 180RH for increasing / decreasing sound output, and a mute button 180RI for switching sound output (ON / OFF).

[0645] <Example of switching networks using advanced terrestrial numeric keypads>

[0646] The remote control 180R of the broadcast receiver 100 in an embodiment of the present invention includes an "Advanced Terrestrial Digital Button," a "Terrestrial Digital Button," an "Advanced BS Button," a "BS Button," and a "CS Button," which serve as network switching buttons 180R5. Regarding the "Advanced Terrestrial Digital Button" and "Terrestrial Digital Button," in advanced terrestrial digital broadcast services, for example, when 4K and 2K broadcast programs are simultaneously broadcast using different layers, it can be configured such that when the "Advanced Terrestrial Digital Button" is pressed, 4K broadcast programs are preferentially selected when selecting a channel, and when the "Terrestrial Digital Button" is pressed, 2K broadcast programs are preferentially selected when selecting a channel. By controlling in this way, for example, it is possible to force the selection of 2K broadcast programs when there are many errors in the transmission waveform of 4K broadcast programs even when 4K broadcast programs can be received, by pressing the "Terrestrial Digital Button."

[0647] <Example of screen display during channel selection>

[0648] As described above, the broadcast receiving device 100 of the embodiments of the present invention has the function of displaying information about the selected channel, such as a banner display, when performing channel selection by single-press selection, channel up / down selection, or direct selection.

[0649] exist Figure 12B The image shows an example of a banner display when selecting a channel. Banner display 192A1 is an example of a banner display shown when a 2K broadcast program is selected. For example, it displays the program name, start / end time, network type, the number of the direct channel selection button on the remote control, and the service logo and 3-digit number. Banner display 192A2 is an example of a banner display shown when a 4K broadcast program is selected. For example, in addition to the same information as in banner display 192A1, it further displays a "4K" symbol indicating that the received program is a 4K broadcast program. Furthermore, this message can also be displayed when resolution conversion processing and downmixing processing have been performed. In the example of banner display 192A2, downmixing processing from UHD resolution to HD resolution and from 22.2ch to 5.1ch is shown.

[0650] In the broadcast receiving device 100, by performing these displays, when the same content is broadcast simultaneously as a 2K broadcast program and a 4K broadcast program, or other broadcast programs of different qualities, the user can appropriately know which broadcast program is being displayed.

[0651] A system for an advanced digital broadcasting service, based on some or all of the functions described above in the embodiments of the present invention, can provide a more advanced digital broadcasting service transmission and reception technology that takes into account compatibility with existing digital broadcasting services. That is, it can provide a technology for better transmission or reception of advanced digital broadcasting services.

[0652] The above describes examples of embodiments of the present invention, but the structure for implementing the technology of the present invention is not limited to the above embodiments, and various modifications can be considered. For example, a part 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. In addition, the numerical values ​​and messages appearing in the text and figures are only examples, and using different ones will not impair the effect of the present invention.

[0653] The functions of the present invention described above can be partially or entirely implemented in hardware, for example, through design in an integrated circuit. Alternatively, they can be implemented in software by interpreting and executing the operation program that implements each function using a microprocessor unit or the like. Both hardware and software can also be used simultaneously.

[0654] Furthermore, the software controlling the broadcast receiver 100 may be pre-stored in the ROM 103 and / or storage unit 110 of the broadcast receiver 100 at the time of manufacture. Alternatively, it may be obtained from other application servers 500 on the Internet 200 via the LAN communication unit 121 after the product is manufactured. Alternatively, the software stored on a memory card or optical disc may be obtained via the expansion interface unit 124. Similarly, the software controlling the portable information terminal 700 may also be pre-stored in the ROM 703 and / or storage unit 710 of the portable information terminal 700 at the time of manufacture. Alternatively, it may be obtained from other application servers 500 on the Internet 200 via the LAN communication unit 721 or the mobile network communication unit 722 after the product is manufactured. Alternatively, the software stored on a memory card or optical disc may be obtained via the expansion interface unit 724.

[0655] Additionally, the control lines and information lines shown in the diagram are those deemed necessary for explanation and do not necessarily represent all control lines and information lines on the product. In fact, it can be assumed that almost all structures are interconnected.

[0656] Description of Reference Numerals

[0657] 100: Broadcast receiver; 101: Main control unit; 102: System bus; 103: ROM; 104: RAM; 110: Storage 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; 200, 200T, 200L, 200B: Antenna; 300, 300T, 300L: Radio tower; 400C: Cable TV headend; 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 receiving device for receiving transmitted waves, characterized in that, include: A modulation and demodulation unit receives multiple different transmitted waves propagating in the air with multiple different polarization directions, and uses pairs of transmitted waves from the multiple different transmitted waves for demodulation processing to generate a stream; and Control Department The control unit identifies, based on the identification information contained in the plurality of different transmitted waves received by the modulation and demodulation unit, a transmitted wave transmitted in a first polarization direction as the main polarization direction and a transmitted wave transmitted in a second polarization direction as the secondary polarization direction, which is different from the first polarization direction as the main polarization direction.

2. The receiving device as claimed in claim 1, characterized in that: The transmitted wave includes a data carrier and a carrier modulated with a different modulation scheme than the data carrier. The identification information is stored in the transmitted wave received by the modulation and demodulation unit in a carrier modulated with a different modulation scheme than the data carrier.

3. The receiving device as described in claim 1, characterized in that: The specified bandwidth of each of the multiple different transmitted waves is divided into a specified number of segments. In the demodulation process, the stream is generated using a portion of the transmission of the first transmission wave in the pair of transmission waves identified based on the identification information and a portion of the transmission of the second transmission wave in the pair of transmission waves.

4. A receiving device for receiving transmitted waves, characterized in that, include: A modulation and demodulation unit receives a transmission wave synthesized from an upper-layer modulated wave and a lower-layer modulated wave, and performs demodulation processing on the upper-layer modulated wave and the lower-layer modulated wave to generate a stream; and Control Department The control unit identifies the upper-layer modulated wave and the lower-layer modulated wave based on the identification information contained in the transmitted wave received by the modulation and demodulation unit.

5. The receiving device as described in claim 4, characterized in that: The transmitted wave includes a data carrier and a carrier modulated with a different modulation scheme than the data carrier. The identification information is stored in the transmitted wave received by the modulation and demodulation unit in a carrier modulated with a different modulation scheme than the data carrier.

6. A method for processing transmitted waves in a receiving device, characterized in that, include: The receiving steps for receiving multiple transmitted waves with different polarization directions in a digital broadcasting system; and A demodulation step that demodulates the plurality of different transmitted waves received in the receiving step to generate a stream. The plurality of different transmitted waves received in the receiving step contain identification information, which can be used to identify the transmission wave sent in a first polarization direction as the main polarization direction and the transmission wave sent in a second polarization direction as the secondary polarization direction, which is different from the first polarization direction as the main polarization direction, in the demodulation step for generating the stream.

7. The method for processing transmitted waves as described in claim 6, characterized in that: The transmitted wave includes a data carrier and a carrier modulated with a different modulation scheme than the data carrier. The identification information is stored in the multiple different transmission waves in a carrier modulated with a modulation scheme different from that of the data carrier.

8. The method for processing transmitted waves as described in claim 6, characterized in that: The specified bandwidth of each of the multiple different transmitted waves is divided into a specified number of segments. In the demodulation step, the stream is generated using a portion of the transmission of a first transmission wave included in the pair of multiple different transmission waves identified based on the identification information and a portion of the transmission of a second transmission wave included in the pair of multiple different transmission waves.

9. A method for processing transmitted waves in a receiving device, characterized in that, include: The receiving steps in a digital broadcasting system for receiving a transmitted wave synthesized from an upper-layer modulated wave and a lower-layer modulated wave; and A demodulation step that demodulates the transmitted wave received in the receiving step to generate a stream. The transmitted wave received in the receiving step contains identification information, which can be used to identify the upper-layer modulation wave and the lower-layer modulation wave required to generate the stream in the demodulation step.

10. The method for processing transmitted waves as described in claim 9, characterized in that: The transmitted wave includes a data carrier and a carrier modulated with a different modulation scheme than the data carrier. The identification information is stored in the multiple different transmission waves in a carrier modulated with a modulation scheme different from that of the data carrier.

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