WO2020007348A1 - 广播信号的发送 - Google Patents

广播信号的发送 Download PDF

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Publication number
WO2020007348A1
WO2020007348A1 PCT/CN2019/094759 CN2019094759W WO2020007348A1 WO 2020007348 A1 WO2020007348 A1 WO 2020007348A1 CN 2019094759 W CN2019094759 W CN 2019094759W WO 2020007348 A1 WO2020007348 A1 WO 2020007348A1
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WO
WIPO (PCT)
Prior art keywords
broadcast signal
stream
information
tlv
mmt
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PCT/CN2019/094759
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English (en)
French (fr)
Inventor
廣田敦志
Original Assignee
青岛海信电器股份有限公司
东芝视频解决方案株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from JP2018127801A external-priority patent/JP6496068B1/ja
Priority claimed from JP2018127802A external-priority patent/JP2020010120A/ja
Application filed by 青岛海信电器股份有限公司, 东芝视频解决方案株式会社 filed Critical 青岛海信电器股份有限公司
Publication of WO2020007348A1 publication Critical patent/WO2020007348A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/13—Arrangements for device control affected by the broadcast information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
    • H04H60/81—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by the transmission system itself
    • H04H60/82—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by the transmission system itself the transmission system being the Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21—Server components or server architectures
    • H04N21/222—Secondary servers, e.g. proxy server, cable television Head-end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2362—Generation or processing of Service Information [SI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2381—Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering

Definitions

  • Embodiments of the present disclosure relate to transmission of a broadcast signal.
  • IP rebroadcasting (also known as IP redistribution) as a supplementary measure for terrestrial wave relay stations can be used to receive digital terrestrial television broadcasting in areas with poor reception conditions Effective means.
  • IP rebroadcast can be effectively used as an option for viewing a digital terrestrial television broadcast regardless of the reception conditions of the broadcast signal.
  • BS Broadcasting Satellite
  • digital terrestrial television broadcasting and IP re-broadcasting in BS digital broadcasting have been standardized in the IPTV (Internet Protocol Television) forum, and commercial services are being performed.
  • IPTV Internet Protocol Television
  • digital terrestrial television broadcasting similarly defines a broadcasting signal transmitting device (for example, a broadcasting station) for each broadcaster A network.
  • the network is an aggregate of MPEG2-TS (Moving Picture Experts Group-2 Transport Stream) specified for a broadcast distribution system.
  • the network is identified based on the network ID (network_id).
  • the network ID in the IP rebroadcast service is assigned the same value as the network ID of digital terrestrial television broadcasting and BS digital broadcasting.
  • IP rebroadcasting is to broadcast the broadcast signal (TS: Transport Stream) transmitted by each broadcast signal transmitting device, through the transmission equipment operated by the IP rebroadcast service provider, and use IP multicast as the IP rebroadcast service. Receiver sends.
  • TS Transport Stream
  • Signals of program-related information and control information such as SI (Service Information) included in each broadcast signal (TS) transmitted by each broadcast signal transmitting device such as non-patent in transmission equipment operated by IP rebroadcast service providers Document 7 describes transmitting to a receiving device via two transmission paths depending on the type.
  • SI Service Information
  • the first transmission path is each IP multicast transmitted through IP multicast together with program (video, audio) information multiplexed in a broadcast signal (TS) transmitted by each broadcast signal transmitting device.
  • the second transmission path is a SI-specific multicast that extracts and aggregates signals of program-related information such as SI included in a broadcast signal (TS) transmitted by each broadcast signal transmitting device, and control information, and transmits it through another IP multicast.
  • SI-dedicated multicast is to aggregate SI signals sent by multiple networks with different network IDs as broadcast signals and send them as one stream.
  • the receiving device corresponding to the SI-dedicated multicast needs to be able to determine which broadcast-signal transmitting device (such as the network holding the ID) each signal of program-related information such as SI and control information transmitted by the SI-dedicated multicast is multiplexed. Or which TS) broadcast signal. Therefore, each signal of program-related information such as SI and control information transmitted by the SI dedicated multicast includes information that can accurately identify the original broadcast signal.
  • the information that can identify the original broadcast signal (TS) is the transport_stream_id described in Non-Patent Document 1 (described later). In the case of digital terrestrial television broadcasting and IP rebroadcasting of digital terrestrial television broadcasting, the value of this transport_stream_id is the same value as the network_id and original_network_id.
  • Non-Patent Document 1 "Standard Specification of Program Scheduling Information for Digital Broadcasting" ARIB STD-B10 Version 5.12 Revised April 12, 2018, Radio Industry and Business Association
  • Non-Patent Document 2 "Standard Specification for Digital Broadcasting Receivers (Expected Specifications)" ARIB STD-B 21, Version 5.10 Revised April 12, 2018, Radio Industry and Business Association
  • Non-Patent Document 3 "Standard Specification for Media Transmission Using MMT in Digital Broadcasting" ARIB STD-B60 Version 1.12 Revised on April 12, 2018, Radio Industry and Business Association
  • Non-Patent Document 4 "Technical Information on Provisions for the Operation of Digital Terrestrial Television Broadcasting" ARIB TR-B14 Version 6.3 Revised on January 22, 2018, Radio Industry and Business Association
  • Non-Patent Document 5 "BS / Broadband CS Digital Broadcasting Regulations Technical Information” ARIB TR-B15 Version 7.1 Revised July 6, 2016, Radio Industry and Business Association
  • Non-Patent Document 6 "Advanced Broadband Satellite Digital Broadcasting Provisions Technical Information” ARIB TR-B39 Version 1.7 revised on April 12, 2018, Radio Industry and Business Association
  • Non-Patent Document 7 "Provisions on IP Rebroadcasting of Digital Terrestrial Television Broadcasting" IPTVFJ STD-0005 Version 1.4 was established on July 18, 2017, and is a general corporate legal person IPTV forum
  • An embodiment of the present disclosure provides a method for transmitting a broadcast signal, including: transmitting the broadcast signal, wherein the broadcast signal is multiplexed in a moving image expert group media transmission-type length value MMT-TLV manner;
  • the control signal information included in the broadcast signal wherein the information of the control signal includes first control information; and when the broadcast signal is rebroadcasted by IP, setting information of the control signal included in the broadcast signal,
  • the method includes: when the first control information separated from the broadcast signal is collected and transmitted to a transmission path of IP multicast different from the broadcast signal, the first identification information of the first control information is replaced with The second identification information identifying the broadcast signal, wherein the second identification information has the same bit length as the first identification information.
  • An embodiment of the present disclosure further provides a broadcast signal transmitting method, including: transmitting the broadcast signal, wherein the broadcast signal is multiplexed in an MMT-TLV manner; and setting information of a control signal included in the broadcast signal.
  • the information of the control signal includes first control information; and in a case where the broadcast signal is re-broadcasted by the IP, setting the information of the control signal included in the broadcast signal includes: from the broadcast signal When the separated first control information is collected and transmitted to a transmission path of IP multicast different from the broadcast signal, second identification information for identifying the broadcast signal is added to the first control information.
  • An embodiment of the present disclosure further provides a broadcast signal sending device, including: a memory storing a computer program; and a processor configured to execute the computer program to implement the broadcasting signal sending method described above.
  • An embodiment of the present disclosure further provides a broadcast signal sending device, including: a memory storing a computer program; and a processor configured to execute the computer program to implement the broadcasting signal sending method described above.
  • FIG. 1 is a diagram illustrating an example of the overall configuration of a system of a transmitting device, a network, and a receiving device operated by a broadcast station, an IP rebroadcast service provider, and the like according to an embodiment of the present disclosure.
  • FIG. 2 is a diagram schematically showing a configuration of the broadcast signal transmission device 100.
  • FIG. 3 is a diagram schematically showing a configuration of a transmission device 110 operated by an IP rebroadcast service provider.
  • FIG. 4 is a diagram schematically showing a configuration of the receiving device 130.
  • 5A and 5B are diagrams showing a list of control information transmitted by SI dedicated multicast in IP rebroadcasting.
  • 6A and 6B are diagrams schematically showing the relationship between the network ID (network_id), transport stream ID (ts_id), and service ID (service_id) in digital terrestrial television broadcasting, and the network ID (network_id), TLV stream in advanced BS digital broadcasting
  • network_id transport stream ID
  • service_id service ID
  • FIG. 6B A diagram showing the relationship between ID (tlv_stream_id) and service ID (service_id).
  • FIG. 7 is a diagram showing a constitution rule of the MH-CDT.
  • FIG. 8A is a diagram showing an example of a configuration rule of the extended MH-CDT.
  • FIG. 8B is a diagram showing another example of a configuration rule of the extended MH-CDT.
  • FIG. 9 is a diagram showing an example of a configuration rule of the extended AMT.
  • FIG. 10 is a sequence example when selecting a station in the IP retransmission service.
  • FIG. 11 is a sequence example in a case where TLV packets and MMT control information are received in SI dedicated multicast in the IP retransmission service.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include at least one of the features.
  • IP rebroadcasting services will also be provided in advanced BS digital broadcasting.
  • TLV Type-Length-Value
  • SI Signal Specific Information
  • the program-related information and control information (SI signals) included in the broadcast signal transmitted by each broadcast signal transmitting device are also in the transmission equipment operated by the IP rebroadcast service provider. It is divided into two transmission paths, namely, IP multicast and SI dedicated multicast, and is transmitted to the receiving device.
  • the receiving device corresponding to the SI-dedicated multicast must be able to determine which broadcast signal transmitted by the SI-signaling information (SI) of the MMT-TLV method transmitted by the SI-dedicated multicast is multiplexed. (TLV stream). Therefore, each SI signal transmitted by the SI dedicated multicast needs to include information capable of correctly identifying a previously multiplexed broadcast signal (TLV stream).
  • SI SI-signaling information
  • the information that can identify the original broadcast signal is tlv_stream_id corresponding to the transport_stream_id of the MPEG-2 multiplexed broadcast signal (TS), such as digital terrestrial television broadcasting.
  • TS MPEG-2 multiplexed broadcast signal
  • Non-Patent Document 1 and Non-Patent Document 3 the ID system of the broadcasting system is different in the case of digital terrestrial television broadcasting and in the case of advanced BS digital broadcasting. Therefore, the value of tlv_stream_id is the same as network_id and original_network_id. Not the same. Therefore, in advanced BS digital broadcasting, it is impossible to identify a broadcasting signal in which an SI signal was originally multiplexed using a network ID. There is a problem that a receiving device that receives such an SI signal cannot use a network ID to identify a broadcast signal (TLV stream) in which an SI signal originally transmitted by SI dedicated multicast is multiplexed.
  • TLV stream broadcast signal
  • the IP rebroadcasting service of the advanced BS digital broadcasting there is no case where the digital terrestrial television broadcasting, the program related information of the BS digital broadcasting, the content of the control information, and the SI signal in the transmission form are transmitted by SI dedicated multicast. It is only assumed that the original multiplexed broadcast signal (TLV stream) is transmitted, and the multiplexed broadcast signal (TLV stream) is taken out and collected and then multiplexed into another stream. SI There is also an information table that does not have unique and uniquely identifiable information such as tlv_stream_id.
  • the SI signal newly transmitted by the SI dedicated multicast does not include information that can identify the previously multiplexed broadcast signal (TLV stream).
  • TLV stream broadcast signal
  • the purpose of this embodiment is to provide SI signals that can be used for IP rebroadcast services in advanced BS digital broadcasting.
  • FIG. 1 is a diagram showing an example of the overall configuration of a system of a broadcasting station 100, a transmitting device 110, a communication network 120, and a receiving device 130 operated by an IP rebroadcast service provider according to an embodiment of the present disclosure.
  • a broadcast signal transmission device (also referred to as a broadcast station) 100 that broadcasts a broadcast program includes a broadcast program server 101 and a first basic function 102.
  • the broadcast signal transmitting apparatus 100 may be a ground station that aggregates and uplinks the programs of the broadcast service providers to the communication satellite 150.
  • the broadcast program server 101 is an area in which data of a broadcast program, a program name, a broadcast date and time, a description of a content, and the like are stored in advance as the broadcast station 100, and may also be referred to as the broadcast station server 101.
  • the broadcast program server 101 may be a server that stores data such as a program transmitted by each broadcast service provider.
  • the first basic function 102 is a basic function of the broadcasting station 100.
  • the first basic function 102 encodes video data, audio data, and the like of a broadcast program, and multiplexes an SI signal and the encoded data as Broadcast signal transmission function.
  • the multiplexing method can be based on the MMT-TLV method described in Non-Patent Document 3.
  • the transmitting device 110 operated by the IP rebroadcasting service provider includes: a broadcasting signal receiving device 111, which receives a broadcasting signal sent by the broadcasting signal transmitting device 100; and an IP transmitting device 112, which is used for receiving the broadcasting signal received by the broadcasting signal receiving device 111 Perform IP rebroadcast.
  • the transmitting device 110 receives a broadcast signal transmitted via the communication satellite 150 using the antenna 113.
  • a communication network 120 for sending an IP rebroadcast signal from the sending device 110 to the receiving device 130 which includes: an IP multicast network 121 for implementing IP multicast; and an access line 122 for sending a user's receiving device 130 is connected to the IP multicast network 121; the edge router 123 is an I / F (Interface) of the IP multicast network 121 and the access line 122.
  • the user's receiving device is indicated by 130.
  • FIG. 2 is a diagram schematically showing a configuration of the broadcast signal transmission device 100.
  • the broadcasting signal transmitting apparatus 100 encodes the program's video data, sound data, and the like into a broadcasting signal for transmission.
  • An image encoder for encoding (also referred to as encoding) image data of a program stored in the broadcasting station server 101 is denoted by reference numeral 211.
  • the video encoder 211 reads a program to be broadcast from the broadcasting station server 101, it encodes the video data of the read program.
  • a sound encoder that encodes sound data of a program stored in the broadcast station server 101 is indicated by reference numeral 212.
  • the sound encoder 212 reads a program to be broadcast from the broadcasting station server 101, it encodes the sound data of the read program.
  • a caption encoder that encodes caption data of a program stored in the broadcast station server 101 is indicated by reference numeral 213.
  • the subtitle encoder 213 reads a program to be broadcast from the broadcasting station server 101, it encodes the subtitle data of the read program.
  • a control data generating unit that generates control information of the TLV packet and MMT is indicated by reference numeral 214.
  • the control signal of the TLV packet is control information (also referred to as TLV-SI) related to the multiplexing of IP packets, and provides correspondence for channel selection information, IP addresses, and services. information.
  • the control information of the MMT is control information (also referred to as MMT-SI) related to the MMT package structure and the broadcast service.
  • the control data generating unit generates a signal of control information of the TLV packet and the MMT, and the control information of the TLV packet and the MMT includes control information related to a program encoded by the video encoder 211, the sound encoder 212, and the subtitle encoder 213.
  • the multiplexing unit in which the control data generated by the unit 214 is multiplexed in the MMT-TLV manner is denoted by reference numeral 215.
  • the multiplexing unit 215 generates a TLV stream obtained by multiplexing the video stream, audio stream, subtitle stream, TLV packet, and MMT control information.
  • a transmitter transmitting a broadcast signal as a broadcast wave is denoted by reference numeral 216.
  • the transmitter 216 performs modulation such as 16APSK (Amplitude Phase Shift Keying) on the TLV stream generated by the multiplexing unit 215, and performs line coding processing such as error correction coding and sends it as a broadcast signal.
  • modulation such as 16APSK (Amplitude Phase Shift Keying)
  • line coding processing such as error correction coding and sends it as a broadcast signal.
  • FIG. 3 is a diagram schematically showing a configuration of a transmission device 110 operated by an IP rebroadcast service provider.
  • the transmitting device 110 is configured to perform a process of receiving each broadcast signal of an IP rebroadcast service target among the broadcast signals transmitted by the broadcast signal transmitting device 100, and transmitting the broadcast signals to the IP multicast network 121.
  • the transmitting device 110 uses the tuner (1) 301-1 to receive a broadcast signal (program 1) obtained via the antenna 113.
  • the received broadcast signal (program 1) is sent to demodulation processing (1) 302-1 and demodulation and error correction decoding such as 16APSK is performed, and demultiplexed by TLV / MMT (1) 303-1 into Control information of video stream, audio stream, subtitle stream, TLV packet and MMT.
  • the TLV / MMT demultiplexing (1) 303-1 sends a part of the control information included in the separated data in the TLV packet and the control information of the MMT to the SI dedicated TLV stream sending process 305, and sends the video stream , Audio stream, subtitle stream, and the remaining TLV packets and MMT control information are multiplexed in MMT-TLV mode and sent to the IP (1) 304-1.
  • the transmitting device 110 receives the broadcast signal (program 2) obtained via the antenna 113 using the tuner (2) 301-2.
  • the received broadcast signal (program 2) is sent to the demodulation process (2) 302-2 and demodulated, error-corrected and decoded, and separated into video streams by TLV / MMT demultiplexing (2) 303-2 , Audio stream, subtitle stream, TLV packet, and MMT control information.
  • the TLV / MMT demultiplexing (2) 303-2 sends a part of the control information included in the separated data to the TLV packet and the control information of the MMT to the SI dedicated TLV stream sending process 305, and sends the video stream ,
  • the audio stream, the subtitle stream, the remaining TLV packets, and the control information of the MMT are multiplexed in the MMT-TLV mode and sent to the IP (2) 304-2.
  • the transmitting device 110 receives the broadcast signal (program n) obtained via the antenna 113 using the tuner (2) 301-n.
  • the received broadcast signal (program n) is sent to demodulation processing (n) 302-n and demodulated, error-corrected and decoded, and demultiplexed by TLV / MMT (n) 303-n into a video stream , Audio stream, subtitle stream, TLV packet, and MMT control information.
  • the TLV / MMT demultiplexing (n) 303-n sends a part of the control information included in the separated data in the TLV packet and the control information of the MMT to the SI dedicated TLV stream sending process 305, and sends the video stream .
  • the audio stream, the subtitle stream, the remaining TLV packets, and the control information of the MMT are multiplexed again in the MMT-TLV mode, and sent to the IP sending process (n) 304-n.
  • IP sending process (1) 304-1 Demultiplexes TLV / MMT (1) 303-1
  • the program (1) stream of the packet and the control information of the MMT is transmitted to the IP multicast network 121.
  • the IP sending process (2) 304-2 demultiplexes the TLV / MMT (2) 303-2 from the multiplexed broadcast signal (program 2) as including the video stream, audio stream, The subtitle stream, the TLV packet, and the program (2) stream of the MMT control information are transmitted to the IP multicast network 121.
  • the IP transmission process (n) 304-3 demultiplexes the multiplexed broadcast signal (program n) sent from the TLV / MMT (n) 303-n as including a video stream, a sound stream, The subtitle stream, the TLV packet, and the program (n) stream of the MMT control information are transmitted to the IP multicast network 121.
  • the SI dedicated TLV stream sending process 305 is demultiplexed from TLV / MMT (1) 303-1, TLV / MMT demultiplexed (2) 303-2, and TLV / MMT demultiplexed
  • the TLV packets sent by (n) 303-n and the control information of the MMT are multiplexed in the MMT-TLV mode, and sent to the IP multicast network 121 as an SI dedicated stream.
  • the multicast network 121 is transmitted as IP multicast, or is transmitted as a program (n) from the IP transmission processing (n) 304-n to the IP multicast network 121 as IP multicast. Based on the viewpoint of the SI transmission path, it can also be called Multicast for each SI.
  • the SI dedicated stream is transmitted from the SI dedicated TLV stream sending process 305 to the IP multicast network 121 as an IP multicast. From the viewpoint of the same SI transmission path, it can also be referred to as SI dedicated multicast.
  • FIG. 4 is a diagram schematically showing a configuration of the receiving device 130.
  • the example of the receiving device 130 in FIG. 4 is an example of a receiving device dedicated to the IP rebroadcast service.
  • the receiving device 130 includes a network interface 400, a communication process 401, and a stream receiving process 402. These network interface 400, communication process 401, and stream reception process 402 function as a reception device dedicated to the IP rebroadcast service.
  • An interface connected to the access line 122, that is, a network interface is denoted by reference numeral 400.
  • Communication processing for processing the protocol stack in the access line 122 is indicated by reference numeral 401.
  • a stream receiving process for receiving a program stream and an SI dedicated stream sent by the edge router 123 is indicated by reference numeral 402.
  • the receiving device 130 includes these functions as receiving devices exclusively for the IP rebroadcasting service, and includes a descrambler 403, a TLV / MMT separation process 404, a sound decoding process 405, a video decoding process 406, a control data analysis unit 407, CAS module 408, prompt processing 409, speaker 410, and display screen 411.
  • These descramblers 403, TLV / MMT separation processing 404, sound decoding processing 405, video decoding processing 406, control data analysis unit 407, prompt processing 408, prompt processing 409, speaker 410, and display screen 411 are functions related to television
  • the receiving device has the same functions.
  • a CPU Central Processing Unit
  • ROM read only memory
  • RAM Random Access Memory
  • NVRAM Non-Volatile Random Access Memory, non-volatile random access memory
  • the program stream and the SI dedicated stream transmitted by the access line 122 are streams of the program (A) of the channel (A) selected by the user of the receiving apparatus 130.
  • the order in which the receiving device 130 acquires the stream of the program (A) of the channel (A) selected by the user from the access line 122 is as follows.
  • the stream receiving process 402 first sends a channel to the edge router 123 in order to receive the stream of the program (A) of the channel (A). Send request for stream (A) in (A).
  • the edge router 123 When the edge router 123 receives the transmission request of the program (A) of the channel (A), it transmits the program stream (A) of the channel (A) transmitted by each IP multicast to the stream receiving process 402. In addition, when the receiving device 130 needs the TLV packet of the program (A) and the control information of the MMT transmitted through the SI dedicated stream, the stream receiving process 402 receives the TLV packet of the program (A) and the control information of the MMT in order to receive it. A request for sending an SI dedicated stream to the edge router 123.
  • the edge router 123 When the edge router 123 receives the transmission request of the SI dedicated stream, it acquires the TLV packet and the MMT control information of the program (A) required in the SI dedicated stream from the SI server (to be described later), and sends it to the stream receiving process 402.
  • the stream receiving process 402 usually inputs a scramble signal such as the program stream (A) of the channel (A) transmitted by the edge router 123 to the descrambler 403.
  • the descrambler 403 descrambles the program stream (A), and inputs the data of the descrambling code to the TLV / MMT separation process 404.
  • the stream receiving process 402 inputs an unscrambled signal such as an SI dedicated stream to the TLV / MMT separation process 404 as it is.
  • the TLV / MMT separation process 404 separates the descrambled program stream (A) into audio stream, video stream, TLV packet, and control information of MMT. In addition, the TLV / MMT separation process 404 separates the SI dedicated stream into TLV packets and control information of the MMT.
  • the TLV / MMT separation process 404 inputs the audio stream separated from the program stream (A) to the audio decoder 405, the video stream to the video decoder 406, and the TLV packet and MMT control information to the control data analysis unit 407. .
  • the TLV / MMT separation process 404 also inputs the TLV packet and MMT control information separated from the SI dedicated stream to the control data analysis unit 407. In this way, a signal of the TLV packet and MMT control information separated from the program stream (A) or a TLV packet and MMT control information separated from the SI dedicated stream is input to the control data analysis unit 407.
  • the audio decoder 405 decodes the input audio stream, and the audio signal generated by the decoding is output from the speaker 410.
  • the video decoder 406 decodes the input video stream, and displays the video signal generated by the decoding on the display device 411.
  • the control data analysis unit 407 analyzes the input control information of the TLV packet and the MMT, and performs necessary control on the decoding processing of the audio decoder 405 and the decoding processing and playback of the video decoder 406, and will be used as the control of the TLV packet and MMT.
  • the image data sent by the message is saved to NVRAM 421.
  • the control data analysis unit 407 extracts the TLV packets of the program (A) of the channel (A) and the control information of the MMT.
  • the stream receiving process 402 extracts the TLV packets of the program (A) of the channel (A) and the control information of the MMT, and determines the TLV packets and Whether the information related to the channel (A) is included in the control information of the MMT and retrieved.
  • the information related to the channel (A) is, for example, tlv_stream_id of the stream of the channel (A).
  • the external interface 430 may be, for example, HDMI (High Definition Multimedia Interface) (registered trademark) or USB (Universal Serial Bus).
  • FIG. 5 is a diagram showing a list of control information transmitted by SI dedicated multicast in IP rebroadcast.
  • FIG. 5A shows a list of program-related information such as SI and control information transmitted by SI dedicated multicast in the IP rebroadcast of digital terrestrial television broadcasting described in Non-Patent Document 7.
  • FIG. 5 (B) shows IP replay in advanced BS digital broadcasting, which is assumed based on the types of program-related information such as SI and control information used in IP rebroadcast in current digital terrestrial television broadcasting.
  • SI program-related information
  • control information used in IP rebroadcast in current digital terrestrial television broadcasting.
  • MH-SDT (MH-Service Description Table), MH-EIT (MH-Event Information Table), MH-CDT (MH-Common Date Table) (Data Table), TLV-NIT (Type, Value-Network, Information Table), MH-BIT (MH-Broadcaster Information Table, Message Processing-Broadcast Information Table), AMT (Address, Map Table, Address The mapping table) is control information of the TLV packet and MMT described in Non-Patent Document 3.
  • FIG. 6 schematically shows the relationship between the network ID (network_id), transport stream ID (ts_id), and service ID (service_id) in digital terrestrial television broadcasting, and the network ID (network_id) and TLV stream ID ( tlv_stream_id) and service ID (service_id).
  • FIG. 6 shows the relationship between a network ID, a transport stream ID (ts_id), and a service ID in digital terrestrial television broadcasting.
  • the network ID is an identifier of a network
  • TS_ID transport_stream_id
  • TS Transport Stream
  • service_id is an identifier of a service.
  • the central control room is, for example, the broadcast signal transmission device 100. Since TS_ID is assigned for each TS, the network ID and TS_ID have a one-to-one relationship in digital terrestrial television broadcasting.
  • a service is a compilation channel compiled by a broadcast service provider.
  • a TS can contain multiple services. That is, the relationship between TS_ID and service ID (service_id) is generally 1 to n (n is an integer of 1 or more).
  • FIG. 6 shows the relationship among the network ID, TLV stream ID, and service ID in the advanced BS digital broadcasting.
  • the network ID is an identifier of a network
  • tlv_stream_id is an identifier of a TLV stream in the MMT-TLV method
  • service_id is an identifier of a service.
  • Advanced BS digital broadcasting is assigned a network ID. Since tlv_stream_id is allocated for each TLV stream, in advanced BS digital broadcasting, the relationship between the network ID and tlv_stream_id is a pair of n (n is an integer of 1 or more).
  • a service is a compilation channel compiled by a broadcast service provider.
  • a TLV stream can also contain multiple services. That is, the relationship between the TLV stream and the service ID (service_id) is generally 1 to n (n is an integer greater than 1).
  • the network ID in the advanced BS digital broadcasting and the identification of the broadcast wave (that is, the TLV stream) sent by the broadcast signal transmitting device are a pair of n (n is an integer greater than 1) ), It is not possible to determine the broadcast wave (ie, TLV stream) transmitted by the broadcast signal transmitting device based on the network ID.
  • the receiving device 130 receiving the SI dedicated stream cannot identify the TLV packet and the MMT included in the SI dedicated stream based on the network ID.
  • an original_network_id exists in addition to the network ID (network_id) as an identification of the network, as described in Non-Patent Document 6, the original_network_id is set to the value of the network_id.
  • MH-CDT MH-Common_Data_Table
  • FIG. 7 is a diagram showing a constitution rule of the MH-CDT.
  • the field shown at 701 is original_network_id.
  • MH-CDT is transmitted only within the TLV stream provided by each broadcasting service provider.
  • download_data_id exists in the constitution of the MH-CDT (syntax)
  • the identifier is assigned in the TLV stream independently based on the management of each broadcast provider, and uniqueness cannot be guaranteed in the network. Therefore, when the MH-CDT is transmitted through the SI dedicated stream, download_data_id cannot be used as information for identifying a previously multiplexed broadcast signal.
  • the broadcast signal transmission device of this embodiment has a function of adding information for identifying a broadcast signal to the MH-CDT and generating an MMT control signal that extends the MH-CDT.
  • FIG. 8A is a diagram showing an example of a configuration rule of the extended MH-CDT.
  • the example shown in FIG. 8A is as follows: As additional information for identifying a broadcast signal, a field of original_network_id of MH-CDT is replaced with a field 801 of tlv_stream_id. With the replacement of the fields, the value of CRC_32 (Cyclic Redundancy Check 32) is calculated and reset again.
  • CRC_32 Cyclic Redundancy Check 32
  • the value of the table_id field (table identification value) 803 may be set different from the value set in the table_id field of the MH-CDT. As the value of the table_id field changes, the value of CRC_32 (Cyclic Redundancy Check 32) 802 is calculated and reset again.
  • FIG. 8B is a diagram showing another example of a configuration rule of the extended MH-CDT.
  • the example shown in FIG. 8B is as follows: As additional information for identifying a broadcast signal, a field 811 of tlv_stream_id is added to the constitution rule of the MH-CDT. With the increase of the field, the value of CRC_32 (Cyclic Redundancy Check 32) 812 is calculated and reset again.
  • CRC_32 Cyclic Redundancy Check 32
  • the value of the table_id field (table identification value) 813 may be set different from the value set in the table_id field of the MH-CDT. As the value of the field 813 of table_id is changed, the value of CRC_32 (Cyclic Redundancy Check 32) 812 is calculated and reset again.
  • the receiving device 130 receiving the extended MH-CDT can identify the TLV stream of the broadcast signal in which the extended MH-CDT is included.
  • the data size of the extended MH-CDT is the same as that of the conventional MH-CDT, and the rate control when generating and transmitting the SI dedicated stream This can be made the same as in the case where a conventional MH-CDT is used, and processing in the IP rebroadcast transmission device can be facilitated.
  • the fields of the conventional MH-CDT can be configured without any semantic changes to form the extended MH-CDT.
  • the rate control when generating and transmitting the SI dedicated stream can be set to be basically the same as that in the case of using the MH-CDT in the past, so that the processing in the IP rebroadcast transmission device can be made easily.
  • Program-related information such as SI (Service Information) transmitted by SI-only multicast in the IP rebroadcast service of digital terrestrial television broadcasting and BS digital broadcasting, content of control information, TLV packets in transmission form, and MMT control information is also transmitted by SI dedicated multicast in the IP rebroadcast service of advanced BS digital broadcasting.
  • SI Service Information
  • TLV stream previously multiplexed broadcast signal
  • TLV packets and control information for MMT examples include AMT (Address Map Table).
  • AMT is a table that provides information correlating service IDs used to identify broadcast programs and IP packet transfer information. However, the AMT does not include information capable of identifying a previously multiplexed broadcast signal (TLV stream).
  • the receiving device 130 receiving the SI dedicated stream cannot determine the tlv_stream_id of the broadcast signal that was originally multiplexed. As a result, the receiving device 130 that has received the AMT cannot easily determine which TLV stream the IP transmission information of the service was transmitted from.
  • FIG. 9 is a diagram showing an example of a configuration rule of the extended AMT.
  • the example shown in FIG. 9 is an example in which the table_id_extension field of the AMT is replaced with the tlv_stream_id field 901. With the replacement of the fields, the value of CRC_32 (Cyclic Redundancy Check 32) 902 is calculated and reset again.
  • CRC_32 Cyclic Redundancy Check 32
  • the value of the field (table identification value) 903 of the table_id may be set to be different from the value set in the table_id field of the conventional AMT.
  • the value of CRC_32 Cyclic Redundancy Check 32
  • a field of tlv_stream_id may be added to the configuration rule of the AMT.
  • the value of CRC_32 (Cyclic Redundancy Check 32) 902 is calculated and reset again.
  • the value of the table_id field (table identification value) 903 may be set to be different from the value set in the table_id field of the conventional AMT.
  • the value of CRC_32 (Cyclic Redundancy Check 32) 902 is calculated and reset again.
  • the receiving device receiving the extended AMT can easily identify which TLV stream the IP transmission information or event ID of the service was transmitted from.
  • the broadcast signal transmitting apparatus of this embodiment can generate the extended MH-CDT and the extended AMT, so that it can correctly process the TLV packet and MMT control information transmitted through the SI dedicated stream in the IP rebroadcast. Therefore, IP rebroadcast can be realized in the MMT-TLV multiplexing mode.
  • FIG. 10 is a sequence example when selecting a station in the IP retransmission service.
  • the IP retransmission service transmission server 1001, the channel selection control information server 1002, and the SI server 1003 are provided in the IP transmission device 112 of FIG.
  • the station selection control information server 1002 is a server providing a station selection control information file for receiving an IP retransmission service.
  • the SI server 1003 is a server that performs SI dedicated multicast.
  • FIG. 10 shows that the IP retransmission service sending server 1001 is sending the program (1) stream shown in S1010, the program (2) stream shown in S1011, and the program (3) stream shown in S1012 to the IP multicast network 121. status.
  • the receiving device 1005 issues a viewing request for the program (1) shown in S1010 to the edge router 1004, and thereby receives the program (1) stream sent by S1010 as shown in S1013.
  • the receiving device 1005 when the user of the receiving device 1005 switches the program to be viewed from program (1) to program (2) (S1014), the receiving device 1005 leaves the edge router 1004 to leave the currently watched program ( 1) Request for a multicast address corresponding to a channel (S1015). Then, the receiving device 1005 requests to join the multicast address corresponding to the channel of the program (2) of the switching destination (S1016).
  • the edge router 1004 transmits the program (2) stream of the switching destination, that is, the stream of S1011 to the receiving device 1005 (S1017).
  • the receiving device 1005 can display the program (2) stream on the display screen of the receiving device 1005 (S1018).
  • channel switching it is possible to simultaneously receive, for example, TLV packets and MMT control information multiplexed in the program (2) stream.
  • channel switching for example, it is also necessary to receive TLV packets and MMT control information in SI dedicated multicast through channel switching.
  • FIG. 11 is a sequence example of a case where TLV packets and MMT control information are received in SI dedicated multicast in the IP retransmission service.
  • the IP retransmission service transmission server 1001 sends the program (1) stream shown in S1110, the program (2) stream shown in S1111, and the program (3) stream shown in S1112 to the IP multicast network 121.
  • the receiving device 1005 When the receiving device 1005 receives the TLV packet and the control information of the MMT through SI dedicated multicast, the receiving device 1005 obtains the access destination information (multicast address) of the SI dedicated multicast from the channel selection control information server 1002 (S1113). The receiving device 1005 uses the acquired access destination information to make a request to join the multicast address of the SI-dedicated multicast (S1114).
  • the SI dedicated multicast S1115 is transmitted from the SI server 1003 to the edge router 1004, and then transmitted from the edge router to the receiving device 1005 (S1116). Thereby, the receiving device 1005 can acquire SI dedicated multicast.
  • the receiving device 1005 After receiving the SI dedicated multicast, the receiving device 1005 requests to leave the multicast address of the SI dedicated multicast (S1116).
  • the receiving device 1005 that has received the SI dedicated multicast extracts the required TLV packets and MMT control information from the received SI dedicated multicast.
  • the receiving device 1005 can extract the required TLV packets and the control information of the MMT using the information for identifying the stream of the previously multiplexed broadcast signal, as described above.

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Abstract

一种广播信号发送方法，包括：发送所述广播信号，其中，所述广播信号以动态图像专家组媒体传输-类型长度值MMT-TLV方式进行多路复用；设定所述广播信号包含的控制信号的信息，其中，所述控制信号的信息包含第一控制信息；在所述广播信号被IP再广播的情况下，设定所述广播信号包含的控制信号的信息，包括：将从所述广播信号分离出的第一控制信息汇集并向与所述广播信号不同的IP组播的传送路径发送时，将所述第一控制信息的第一识别信息替换为用于识别所述广播信号的第二识别信息，其中，所述第二识别信息与所述第一识别信息的比特长度相同。

Description

广播信号的发送
相关申请的交叉引用
本专利申请要求于2018年7月4日提交的、申请号为2018-127801、发明名称为“放送信号送受信装置”和2018年7月4日提交的、申请号为2018-127802、发明名称为“放送信号送受信方法”的日本专利申请的优先权，该申请的全文以引用的方式并入本文中。
技术领域
本公开的实施方式涉及广播信号的发送。
背景技术
数字地面电视广播的IP(Internet Protocol，互联网协议)再广播(也称为IP再发布)作为地面波中继站的补充措施是在广播信号的接收条件不佳的地域中能够用于接收数字地面电视广播的有效手段。另外，由于例如不需要设置天线等理由，无论广播信号的接收条件如何，IP再广播都能作为数字地面电视广播的观看方法的一个选择项而被有效利用。在BS(Broadcasting Satellite，广播卫星)数字广播中，也同样存在IP再广播。
这些数字地面电视广播、BS数字广播中的IP再广播在IPTV(Internet Protocol Television，互联网协议电视)论坛中已经标准化，并正在进行商用服务。例如，在数字地面电视广播的IP再广播服务中，如非专利文献7(后述)记载的那样，数字地面电视广播同样地，针对各广播业务商的广播信号发送装置(例如广播电台)规定一个网络。这里，网络是针对一个广播分配系统规定的MPEG2-TS(Moving Picture Experts Group-2 Transport Stream，动态图像专家组-2传输流)多路复用的集合体。
基于网络ID(network_id)来识别网络。IP再广播服务中的网络ID被分配有与数字地面电视广播、BS数字广播的网络ID相同的值。一般来说，IP再广播是将各广播信号发送装置发送的广播信号(TS：Transport Stream，传输流)，经由IP再广播服务业务商运营的发送设备，作为IP再广播服务通过IP组播向接收装置发送。
各广播信号发送装置发送的各广播信号(TS)中包含的SI(Service Information，业务信息)等节目相关信息、控制信息的信号，在IP再广播服务业务商运营的发送设备中，如非专利文献7记载那样根据其种类经由两个传送路径向接收装置发送。
第一个传送路径是与各广播信号发送装置发送的广播信号(TS)中多路复用的节目(影像、声音)信息一并，通过IP组播发送的各台IP组播。第二个传送路径是将各广播信号发送装置发送的广播信号(TS)包含的SI等节目相关信息、控制信息的信号取出并汇集，通过另一个IP组播发送的SI专用组播。在地面广播的再广播的情况下，SI专用组播是将由不同网络ID的多个网络发送的SI信号作为广播信号汇总为一个流来发送。
SI专用组播对应的接收装置需要能够判别由SI专用组播发送的SI等节目相关信息、控制信息的各信号是被多路复用于哪个广播信号发送装置发送的(持有哪个ID的网络或者哪个TS发送的)广播信号。因此，由SI专用组播发送的SI等的节目相关信息、控制信息的各信号包含有能够正确识别原先的广播信号的信息。能够识别原先的广播信号(TS)的信息是非专利文献1(后述)记载的transport_stream_id。在数字地面电视广播、数字地面电视广播的IP再广播的情况下，该transport_stream_id的值是与network_id、original_network_id相同的值。
相关技术文献
非专利文献1：“数字广播使用的节目安排信息的标准规格”ARIB STD-B10 5.12版2018年4月12日修订，一般社团法人无线电工业和商业协会
非专利文献2：“数字广播接收装置标准规格(期望规格)”ARIB STD-B 21 5.10版2018年4月12日修订，一般社团法人无线电工业和商业协会
非专利文献3：“在数字广播中利用MMT的媒体传输标准规格”ARIB STD-B60 1.12版2018年4月12日修订，一般社团法人无线电工业和商业协会
非专利文献4：“地面数字电视广播运用规定技术资料”ARIB TR-B14 6.3版2018年1月22日修订，一般社团法人无线电工业和商业协会
非专利文献5：“BS/宽带CS数字广播运用规定技术资料”ARIB TR-B15 7.1版2016年7月6日修订，一般社团法人无线电工业和商业协会
非专利文献6：“高级宽带卫星数字广播运用规定技术资料”ARIB TR-B39 1.7版2018年4月12日修订，一般社团法人无线电工业和商业协会
非专利文献7：“数字地面电视广播IP再广播运用规定”IPTVFJ STD-0005 1.4版2017年7月18日制定，一般社团法人IPTV论坛
发明内容
本公开实施例提供一种广播信号发送方法，包括：发送所述广播信号，其中，所述广播信号以动态图像专家组媒体传输-类型长度值MMT-TLV方式进行多路复用；设定所述广播信号包含的控制信号的信息，其中，所述控制信号的信息包含第一控制信息；在所述广播信号被IP再广播的情况下，设定所述广播信号包含的控制信号的信息，包括：将从所述广播信号分离出的第一控制信息汇集并向与所述广播信号不同的IP组播的传送路径发送时，将所述第一控制信息的第一识别信息替换为用于识别所述广播信号的第二识别信息，其中，所述第二识别信息与所述第一识别信息的比特长度相同。
本公开实施例还提供一种广播信号发送方法，包括：发送所述广播信号，其中，所述广播信号以MMT-TLV方式进行多路复用；设定所述广播信号包含的控制信号的信息，其中，所述控制信号的信息中包含第一控制信息；在所述广播信号被IP再广播的情况下，设定所述广播信号包含的控制信号的信息，包括：将从所述广播信号分离出的第一控制信息汇集并向与所述广播信号不同的IP组播的传送路径发送时，在所述第一控制信息中增加用于识别所述广播信号的第二识别信息。
本公开实施例还提供一种广播信号发送设备，包括：存储器，存储有计算机程序；和处理器，被配置为执行所述计算机程序以实现上述所述的广播信号发送方法。
本公开实施例还提供一种广播信号发送设备，包括：存储器，存储有计算机程序；和处理器，被配置为执行所述计算机程序以实现上述所述的广播信号发送方法。
附图说明
图1是示出本公开的实施方式涉及的广播电台、IP再广播服务业务商运营的发送装置、网络、接收装置的系统整体的结构例的图。
图2是概略地示出广播信号发送装置100的结构的图。
图3是概略地示出IP再广播服务业务商运营的发送装置110的结构的图。
图4是概略地示出接收装置130的结构的图。
图5A和5B是示出在IP再广播中由SI专用组播发送的控制信息的列表的图。
图6A和6B是概略地示出数字地面电视广播中的网络ID(network_id)、传输流ID(ts_id)、业务ID(service_id)的关系以及高级BS数字广播中的网络ID(network_id)、 TLV流ID(tlv_stream_id)、业务ID(service_id)的关系的图。
图7是表示MH-CDT的构成规则的图。
图8A是示出扩展MH-CDT的构成规则的例子的图。
图8B是示出扩展MH-CDT的构成规则的另一例子的图。
图9是示出扩展AMT的构成规则的例子的图。
图10是IP再发送服务中的选站时的序列例。
图11是在IP再发送服务中的SI专用组播中接收TLV包以及MMT的控制信息的情况下的序列例。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
本公开的说明书和权利要求书及所述附图中的术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。
伴随着由高级BS产生的4K/8K的高级BS数字广播的正式广播从2018年12月开始，预想在高级BS数字广播中也要提供IP再广播服务。高级BS数字广播中的TLV(Type-Length-Value，类型长度值)包以及MMT(MPEG Media Transfer，MPEG媒体传输)的控制信息、即SI(Signaling Information，信令信息)信号大多会沿袭数字地面电视广播、BS数字广播的SI(Service Information，业务信息)信号、PSI(Program Specific Information，节目特定信息)信号等节目相关信息、控制信息的内容、传送形式。
因而，设想在高级BS数字广播的IP再广播服务中，各广播信号发送装置发送的广 播信号包含的节目相关信息、控制信息(SI信号)也是在IP再广播服务业务商运营的发送设备中，分为各台IP组播与SI专用组播这两个传送路径向接收装置发送。
与该SI专用组播对应的接收装置必须能够判别由SI专用组播发送的、MMT-TLV方式的SI(Signaling Information)的各信号是被多路复用于哪个广播信号发送装置发送的广播信号(TLV流)。因此，由SI专用组播发送的SI的各信号需要包含能够正确识别原先被多路复用的广播信号(TLV流)的信息。
在高级BS数字广播的情况下，能够识别原先的广播信号(TLV流)的信息是数字地面电视广播等的与MPEG-2多路复用方式的广播信号(TS)的transport_stream_id相当的tlv_stream_id。
但是，如非专利文献1、非专利文献3所示，广播系统的ID的体系在数字地面电视广播的情况下与在高级BS数字广播的情况下会不同，因而tlv_stream_id的值与network_id、original_network_id并不相同。因此，在高级BS数字广播中，使用网络ID无法识别SI信号原先被多路复用的广播信号。存在如下问题：接收到这样的SI信号的接收装置无法使用网络ID来识别由SI专用组播发送的SI信号原先被多路复用的广播信号(TLV流)。
另外，还设想在高级BS数字广播的IP再广播服务中，没有沿袭数字地面电视广播、BS数字广播的节目相关信息、控制信息的内容、传送形式的SI信号由SI专用组播传送的情况。只设想在原先被多路复用的广播信号(TLV流)内传送，从被多路复用的广播信号(TLV流)中取出并汇集再多路复用于另一个流的情况下，SI信号中也存在没有持有tlv_stream_id那样不重复而能够唯一地识别的信息的信息表。
因此，也考虑在高级BS数字广播中，由SI专用组播新传送的SI信号中不包含能够识别原先被多路复用的广播信号(TLV流)的信息的情况。存在如下问题：接收到这样的SI信号的接收装置无法识别由SI专用组播发送的SI信号原先被多路复用的广播信号(TLV流)。
因此，本实施方式中，目的在于提供在高级BS数字广播中能够用于IP再广播服务的SI信号。
下面，使用附图来详细地说明实施方式。
第一实施方式
图1是示出本公开的实施方式涉及的广播电台100、IP再广播服务业务商运营的发 送装置110、通信网络120、接收装置130的系统整体的结构例的图。
将广播节目进行广播的广播信号发送装置(也称为广播电台)100，具备广播节目服务器101以及第一基本功能102。广播信号发送装置100也可以是将各广播业务商的节目汇集并且上行传输(uplink)到通信卫星150的地面站。
广播节目服务器101是作为广播电台100而预先保存广播的节目的数据、节目的名称、广播日期时间、内容的说明等的区域，也可称为广播电台服务器101。广播节目服务器101也可以是保存各广播业务商发送的节目等数据的服务器。第一基本功能102是广播电台100的基本的功能，具有将广播的节目的影像数据、声音数据等进行编码(encode)，并且将SI信号和上述编码后的数据进行多路复用化来作为广播信号发送的功能。多路复用方式可以依据非专利文献3记载的MMT-TLV方式。
IP再广播服务业务商运营的发送装置110，其包括：广播信号接收装置111，接收广播信号发送装置100发送的广播信号；IP发送装置112，用于将广播信号接收装置111接收到的广播信号进行IP再广播。发送装置110利用天线113来接收经由通信卫星150发送的广播信号。
用于将来自发送装置110的IP再广播的信号发送至接收装置130的通信网络120，其包括：IP组播网121，用于实现IP组播；访问线路122，用于将用户的接收装置130连接到IP组播网121；边缘路由器123，是IP组播网121和访问线路122的I/F(Interface，接口)。
用户的接收装置用130表示。
图2是概略地示出广播信号发送装置100的结构的图。广播信号发送装置100为了将广播电台服务器101中存储的广播节目以广播信号来发送，将节目的影像数据、声音数据等进行编码转为广播信号发送。
对广播电台服务器101中存储的节目的影像数据进行编码(也称为encode)的影像编码器采用附图标记211表示。当影像编码器211从广播电台服务器101读出将要广播的节目时，将所读出的节目的影像数据进行编码。
对在广播电台服务器101中存储的节目的声音数据进行编码的声音编码器采用附图标记212表示。当声音编码器212从广播电台服务器101读出将要广播的节目时，将所读出的节目的声音数据进行编码。对广播电台服务器101中存储的节目的字幕数据进行编码的字幕编码器采用附图标记213表示。当字幕编码器213从广播电台服务器101读 出将要广播的节目时，将所读出的节目的字幕数据进行编码。
生成TLV包以及MMT的控制信息的控制数据生成单元采用附图标记214表示。如非专利文献3记载的那样，TLV包的控制信号是与IP包的多路复用相关的控制信息(也称为TLV-SI)，提供用于选台的信息、IP地址和业务的对应信息。另外，MMT的控制信息是与MMT的封装的结构以及广播业务相关的控制信息(也称为MMT-SI)。控制数据生成单元生成TLV包以及MMT的控制信息的信号，所述TLV包以及MMT的控制信息包括与由影像编码器211、声音编码器212、字幕编码器213进行编码的节目相关的控制信息。
将影像编码器211对影像数据进行编码而生成的影像流、声音编码器212对声音数据进行编码而生成的声音流、字幕编码器213对字幕数据进行编码而生成的字幕流、由控制数据生成单元214生成的控制数据以MMT-TLV方式进行多路复用的多路复用单元采用附图标记215表示。多路复用单元215生成将影像流、声音流、字幕流、TLV包以及MMT的控制信息进行多路复用而成的TLV流。
将广播信号作为广播波发送的发送机采用附图标记216表示。发送机216对多路复用单元215生成的TLV流进行16APSK(Amplitude Phase Shift Keying，振幅移相键控)等调制、纠错编码等线路编码处理并作为广播信号发送。
图3是概略地示出IP再广播服务业务商运营的发送装置110的结构的图。发送装置110用于进行如下处理：全部接收广播信号发送装置100发送的广播信号中的IP再广播服务的对象的各广播信号，并且向IP组播网121发送。
具体地，发送装置110利用调谐器(1)301-1来接收经由天线113而得到的广播信号(节目1)。所接收到的广播信号(节目1)被发送到解调处理(1)302-1并且进行16APSK等解调、纠错解码，通过TLV/MMT解多路复用(1)303-1分离为影像流、声音流、字幕流、TLV包以及MMT的控制信息。
其中，TLV/MMT解多路复用(1)303-1将分离出的数据中的包含在TLV包以及MMT的控制信息中的一部分控制信息发送到SI专用TLV流送出处理305，将影像流、声音流、字幕流与剩余的TLV包以及MMT的控制信息以MMT-TLV方式再进行多路复用，向IP送出处理(1)304-1发送。
同样地，发送装置110利用调谐器(2)301-2来接收经由天线113而得到的广播信号(节目2)。所接收到的广播信号(节目2)被发送到解调处理(2)302-2并且进行 解调、纠错解码，通过TLV/MMT解多路复用(2)303-2分离为影像流、声音流、字幕流、TLV包以及MMT的控制信息。
其中，TLV/MMT解多路复用(2)303-2将分离出的数据中的包含在TLV包以及MMT的控制信息中的一部分控制信息发送到SI专用TLV流送出处理305，将影像流、声音流、字幕流与剩余的TLV包以及MMT的控制信息以MMT-TLV方式再进行多路复用，向IP送出处理(2)304-2发送。
同样地，发送装置110利用调谐器(2)301-n来接收经由天线113而得到的广播信号(节目n)。所接收到的广播信号(节目n)被发送到解调处理(n)302-n并且进行解调、纠错解码，通过TLV/MMT解多路复用(n)303-n分离为影像流、声音流、字幕流、TLV包以及MMT的控制信息。
其中，TLV/MMT解多路复用(n)303-n将分离出的数据中的包含在TLV包以及MMT的控制信息中的一部分控制信息发送到SI专用TLV流送出处理305，将影像流、声音流、字幕流与剩余的TLV包以及MMT的控制信息以MMT-TLV方式再进行多路复用，向IP送出处理(n)304-n发送。
IP送出处理(1)304-1将TLV/MMT解多路复用(1)303-1发送的被多路复用的广播信号(节目1)作为包含影像流、声音流、字幕流和TLV包以及MMT的控制信息的节目(1)流，向IP组播网121发送。
同样地，IP送出处理(2)304-2将从TLV/MMT解多路复用(2)303-2发送的被多路复用的广播信号(节目2)作为包含影像流、声音流、字幕流和TLV包以及MMT的控制信息的节目(2)流，向IP组播网121发送。
同样地，IP送出处理(n)304-3将从TLV/MMT解多路复用(n)303-n发送的被多路复用的广播信号(节目n)作为包含影像流、声音流、字幕流和TLV包以及MMT的控制信息的节目(n)流，向IP组播网121发送。
另一方面，SI专用TLV流送出处理305将从TLV/MMT解多路复用(1)303-1、TLV/MMT解多路复用(2)303-2、TLV/MMT解多路复用(n)303-n各自发送的TLV包以及MMT的控制信息以MMT-TLV方式进行多路复用，作为一个SI专用流，向IP组播网121发送。
关于作为节目(1)流而从IP送出处理(1)304-1向IP组播网121作为IP组播发送、或者作为节目(2)流而从IP送出处理(2)304-2向IP组播网121作为IP组播发 送、或者作为节目(n)流而从IP送出处理(n)304-n向IP组播网121作为IP组播发送，基于SI传送路径的观点，也可以称为各台SI组播。
另外，关于作为SI专用流而从SI专用TLV流送出处理305向IP组播网121作为IP组播发送，基于相同的SI传送路径的观点，也可以称为SI专用组播。
图4是概略地示出接收装置130的结构的图。
图4的接收装置130的例子是IP再广播服务专用的接收装置的例子。
接收装置130包括网络接口400、通信处理401、流接收处理402。这些网络接口400、通信处理401、流接收处理402作为IP再广播服务专用的接收装置来发挥功能。与访问线路122连接的接口、即网络接口采用附图标记400表示。
对访问线路122中的协议栈进行处理的通信处理采用附图标记401表示。对边缘路由器123发送的节目流、SI专用流进行接收处理的流接收处理采用附图标记402表示。接收装置130除了包括这些作为IP再广播服务专用的接收装置的功能以外，还包括解扰码器403、TLV/MMT分离处理404、声音解码处理405、影像解码处理406、控制数据解析单元407、CAS模块408、提示处理409、扬声器410、显示画面411。这些解扰码器403、TLV/MMT分离处理404、声音解码处理405、影像解码处理406、控制数据解析单元407、提示处理408、提示处理409、扬声器410、显示画面411形成的功能是与电视接收装置持有的功能相同。
另外，还包括用于使接收装置130的这些功能进行工作的CPU(Central Processing Unit，中央处理器)425、ROM(read only memory，只读存储器)423、RAM(Random Access Memory，随机存取存储器)424、NVRAM(Non-Volatile Random Access Memory，非易失性随机访问存储器)421的资源。这里，访问线路122发送的节目流、SI专用流是接收装置130的用户选择的频道(A)的节目(A)的流。
接收装置130从访问线路122获取用户选择的频道(A)的节目(A)的流的顺序如下所述。当接收装置130的用户选择作为要观看的节目，即频道(A)的节目(A)时，流接收处理402为了接收频道(A)的节目(A)的流，首先对边缘路由器123发送频道(A)的流(A)的发送请求。
边缘路由器123当接收到频道(A)的节目(A)的流的发送请求时，将由各台IP组播发送的频道(A)的节目流(A)向流接收处理402发送。另外，在接收装置130需要通过SI专用流发送的节目(A)的TLV包以及MMT的控制信息的情况下，流接 收处理402为了接收所需要的节目(A)的TLV包以及MMT的控制信息，对边缘路由器123发送SI专用流的发送请求。
边缘路由器123当接收到SI专用流的发送请求时，从SI服务器(后述)获取SI专用流中所需要的节目(A)的TLV包以及MMT的控制信息，向流接收处理402发送。流接收处理402通常向解扰码器403输入如边缘路由器123发送的频道(A)的节目流(A)那样的加扰信号。
解扰码器403将节目流(A)进行解扰码，将解扰码的数据向TLV/MMT分离处理404输入。另外，流接收处理402将如SI专用流那样的不加扰信号原样向TLV/MMT分离处理404输入。
TLV/MMT分离处理404将解扰码后的节目流(A)分离为声音流、影像流、TLV包以及MMT的控制信息。另外，TLV/MMT分离处理404将SI专用流分离为TLV包以及MMT的控制信息。
TLV/MMT分离处理404将从节目流(A)分离出的声音流输入到声音解码器405、将影像流输入到影像解码器406、将TLV包以及MMT的控制信息输入到控制数据解析单元407。另外，TLV/MMT分离处理404将从SI专用流分离出的TLV包以及MMT的控制信息也输入到控制数据解析单元407。这样，从节目流(A)分离出的TLV包以及MMT的控制信息的信号或者从SI专用流分离出的TLV包以及MMT的控制信息被输入到控制数据解析单元407。
声音解码器405将所输入的声音流进行解码，通过解码而生成的声音信号由扬声器410输出。影像解码器406将所输入的影像流进行解码，通过解码而生成的影像信号显示于显示装置411。
控制数据解析单元407对所输入的TLV包以及MMT的控制信息进行解析，对声音解码器405的解码处理、影像解码器406的解码处理和播放进行必要的控制，将作为TLV包以及MMT的控制信息发送的图像数据保存到NVRAM 421。另外，在从SI专用流分离出的TLV包以及MMT的控制信息中，控制数据解析单元407取出频道(A)的节目(A)的TLV包以及MMT的控制信息。在从SI专用流分离出的TLV包以及MMT的控制信息中，流接收处理402取出频道(A)的节目(A)的TLV包以及MMT的控制信息时，判定SI专用流包含的TLV包以及MMT的控制信息中是否包含与频道(A)相关的信息并且取出。与频道(A)相关的信息例如是频道(A)的流的tlv_stream_id。
使用图10、图11说明在接收装置130与边缘路由器123之间选台时的序列、获取SI专用流时的序列。外部接口430例如可以是HDMI(High Definition Multimedia Interface，高清多媒体接口)(注册商标)、USB(Universal Serial Bus，通用串行总线)。
图5是示出在IP再广播中由SI专用组播发送的控制信息的列表的图。图5的(A)示出了在非专利文献7记载的数字地面电视广播的IP再广播中由SI专用组播发送的SI等节目相关信息以及控制信息的列表。
另外，图5的(B)示出根据在目前的数字地面电视广播中的IP再广播中所使用的SI等节目相关信息以及控制信息的种类而设想的、在高级BS数字广播中进行IP再广播的情况下由SI专用组播发送的TLV包以及MMT的控制信息的例子的列表。MH-SDT(MH-Service Description Table，消息处理-业务描述表)、MH-EIT(MH-Event Information Table，消息处理-事件信息表)、MH-CDT(MH-Common Date Table，消息处理-通用数据表)、TLV-NIT(Type Length Value-Network Information Table，类型长度值-网络信息表)、MH-BIT(MH-Broadcaster Information Table，消息处理-广播信息表)、AMT(Address Map Table，地址映射表)是非专利文献3记载的TLV包以及MMT的控制信息。
如上所述，数字地面电视广播中的网络的网络ID与高级BS数字广播中的广播系统的ID的体系不同。图6是概略地示出数字地面电视广播中的网络ID(network_id)、传输流ID(ts_id)、业务ID(service_id)的关系以及高级BS数字广播中的网络ID(network_id)、TLV流ID(tlv_stream_id)、业务ID(service_id)的关系的图。
图6的(A)表示数字地面电视广播中的网络ID、传输流ID(ts_id)、业务ID的关系。如非专利文献4所记载，网络ID是网络的标识，TS_ID(transport_stream_id)是MPEG2-TS的TS(Transport Stream，传输流)的标识，service_id是业务的标识。
针对各中心控制室分配一个网络ID。中心控制室例如是广播信号发送装置100。因为按每个TS来分配TS_ID，所以在数字地面电视广播中，网络ID与TS_ID为一对一的关系。
业务(service)是广播业务商编制的编制频道。一个TS中可以包含多个业务。也就是说，TS_ID与业务ID(service_id)一般来说为1对n(n是1以上的整数)的关系。
某广播信号发送装置A中的网络ID、传输流ID、业务ID的关系由附图标记601示出。示出如下：针对广播信号发送装置A规定一个网络ID＝A的网络601-1，针对该网 络601-1存在一个TS_id＝A的TS601-2，在该TS601-2中存在业务ID＝A1的业务601-31、业务ID＝A2的业务601-32的多个业务。
同样地，602示出了某广播信号发送装置B中的网络ID、传输流ID、业务ID的关系。示出如下：针对广播信号发送装置B规定一个网络ID＝B的网络602-1，针对该网络602-1存在一个TS_id＝B的TS602-2，在该TS602-2中存在业务ID＝B1的业务602-31、业务ID＝B2的业务602-32的多个业务。
图6的(B)表示高级BS数字广播中的网络ID、TLV流ID、业务ID的关系。如非专利文献6所记载，网络ID是网络的标识，tlv_stream_id是MMT-TLV方式的TLV流的标识，service_id是业务的标识。
高级BS数字广播分配有一个网络ID。因为按每个TLV流分配tlv_stream_id，所以在高级BS数字广播中，网络ID与tlv_stream_id为一对n(n是1以上的整数)的关系。
业务(service)是广播业务商编制的编制频道。一个TLV流中也可以包含多个业务。也就是说，TLV流与业务ID(service_id)一般来说为1对n(n是1以上的整数)的关系。
这里，与数字地面电视广播的情况不同，高级BS数字广播中的网络ID与广播信号发送装置发送的广播波(即TLV流)的标识(即tlv_stream_id)为一对n(n是1以上的整数)的关系，所以无法根据网络ID来确定广播信号发送装置发送的广播波(即TLV流)。
因此，在包含网络ID的TLV包以及MMT的控制信息是通过SI专用流发送的情况下，接收到SI专用流的接收装置130无法根据网络ID来识别SI专用流中包含的TLV包以及MMT的控制信息原先被多路复用的广播信号的tlv_stream_id。
虽然作为网络的标识，除了网络ID(network_id)以外还存在original_network_id，但如非专利文献6记载，original_network_id设定为network_id的值。
在图5的(B)所示的TLV包以及MMT的控制信息的例子的列表中，在包含network_id或者original_network_id的TLV包以及MMT的控制信息中有MH-CDT(MH-Common_Data_Table)。
图7是表示MH-CDT的构成规则的图。701所示的字段为original_network_id。而且，设想高级BS数字广播中，MH-CDT仅在各广播业务商提供的TLV流内被传送。虽然在MH-CDT的构成规则(syntax)中存在download_data_id，但该标识是在各广播 业务商的管理的基础上在TLV流内独自分配的，在网络内无法保证唯一性。因而，在MH-CDT通过SI专用流发送的情况下，download_data_id无法作为用于识别原先被多路复用的广播信号的信息来利用。
因此，本实施方式的广播信号发送装置具备将用于识别广播信号的信息附加到MH-CDT、生成扩展MH-CDT的MMT控制信号的功能。
图8A是示出扩展MH-CDT的构成规则的例子的图。图8A示出的例子如下：作为附加的用于识别广播信号的信息，用tlv_stream_id的字段801替换MH-CDT的original_network_id的字段。伴随着字段的替换，再次计算并重新设定CRC_32(Cyclic Redundancy Check 32，循环冗余校验32)802的值。
还有，为明确与以往的MH-CDT的区别，也可以将table_id的字段(表的识别值)803的值设定为与MH-CDT的table_id的字段设定的值不相同。伴随着table_id的字段的值的更改，再次计算并重新设定CRC_32(Cyclic Redundancy Check 32)802的值。
图8B是示出扩展MH-CDT的构成规则的其它例子的图。图8B示出的例子如下：作为附加的用于识别广播信号的信息，在MH-CDT的构成规则中增加了tlv_stream_id的字段811。伴随着字段的增加，再次计算并重新设定CRC_32(Cyclic Redundancy Check 32)812的值。
还有，为明确与以往的MH-CDT的区别，也可以将table_id的字段(表的识别值)813的值设定为与MH-CDT的table_id的字段设定的值不相同。伴随着table_id的字段813的值的更改，再次计算并重新设定CRC_32(Cyclic Redundancy Check 32)812的值。
通过在MH-CDT中将构成规则的original_network_id字段替换为tlv_stream_id字段、或者增加tlv_stream_id字段，使得接收到扩展MH-CDT的接收装置130能够识别扩展MH-CDT被包含在哪个广播信号的TLV流。
关于图8A示出的例子，由于被替换的original_network_id字段与替换的tlv_stream_id为相同的字段大小，因此扩展MH-CDT的数据大小与以往的MH-CDT相同，生成和发送SI专用流时的速率控制能够设为与以往的使用MH-CDT的情况相同，从而能够使IP再广播发送装置中的处理变得容易。
关于图8B示出的例子，能够对以往的MH-CDT的各字段不施加语义上的变更而构成扩展MH-CDT。另外，由于数据大小与MH-CDT基本相同，生成和发送SI专用流时的速率控制能够设为与以往的使用MH-CDT的情况基本相同，从而能够使IP再广 播发送装置中的处理变得容易。
第二实施方式
另外，设想如下情况：没有沿袭数字地面电视广播、BS数字广播的IP再广播服务中由SI专用组播发送的SI(Service Information)等节目相关信息、控制信息的内容、传送形式的TLV包以及MMT的控制信息，其在高级BS数字广播的IP再广播服务中也由SI专用组播传送。在该情况下，需要在相应的TLV包以及MMT的控制信息中包含能够识别原先被多路复用的广播信号(TLV流)的信息。
作为这样的TLV包以及MMT的控制信息的例子，存在AMT(Address Map Table，地址映射表)。AMT是提供将用于识别广播节目的业务ID和IP包传送信息关连的信息的表。但是，AMT没有包含能够识别原先被多路复用的广播信号(TLV流)的信息。
因此，在AMT通过SI专用流发送的情况下，接收到SI专用流的接收装置130无法确定原先被多路复用的广播信号的tlv_stream_id。其结果是，接收到AMT的接收装置130无法容易地确定是业务的IP传送信息由哪个TLV流传送的。
因此，本实施方式的广播信号发送装置具备将用于识别广播信号的信息附加到AMT、生成扩展AMT的TLV包控制信息的功能。图9是示出扩展AMT的构成规则的例子的图。图9示出的例子是用tlv_stream_id字段901替换了AMT的table_id_extension字段的例子。伴随着字段的替换，再次计算并重新设定CRC_32(Cyclic Redundancy Check 32)902的值。
还有，为了明确与以往的AMT的区别，也可以将table_id的字段(表的识别值)903的值设定为与以往的AMT的table_id的字段设定的值不相同。伴随着table_id的字段903的值的变更，再次计算并重新设定CRC_32(Cyclic Redundancy Check 32)902的值。
而且，与扩展MH-CDT的情况同样地，也可以在AMT的构成规则中增加tlv_stream_id的字段。伴随着字段的增加，再次计算并重新设定CRC_32(Cyclic Redundancy Check 32)902的值。
在该情况下，为了明确与以往的AMT的区别，也可以将table_id的字段(表的识别值)903的值设定为与以往的AMT的table_id的字段设定的值不相同。伴随着table_id的字段903的值的变更，再次计算并重新设定CRC_32(Cyclic Redundancy Check  32)902的值。
将AMT的table_id_extension字段替换为tlv_stream_id字段，由此接收到扩展AMT的接收装置能够容易地识别业务的IP传送信息或者事件ID是由哪个TLV流传送的。
如上所述，本实施方式的广播信号发送装置生成扩展MH-CDT、扩展AMT，由此能够正确处理通过IP再广播中的SI专用流发送的TLV包以及MMT的控制信息。因此，能够在MMT-TLV方式的多路复用方式下实现IP再广播。
图10是IP再发送服务中的选站时的序列例。IP再发送服务送出服务器1001、选台控制信息服务器1002、SI服务器1003设在图1的IP发送装置112中。选台控制信息服务器1002是提供用于接收IP再发送服务的选站控制信息文件的服务器。SI服务器1003是进行SI专用组播的服务器。
图10示出了IP再发送服务送出服务器1001正在将S1010所示的节目(1)流、S1011所示的节目(2)流、S1012所示的节目(3)流向IP组播网121发送的状态。另外，接收装置1005向边缘路由器1004发出S1010所示的节目(1)的观看请求，由此如S1013所示，接收由S1010发送的节目(1)流。
在这样的状态下，当接收装置1005的用户将要观看的节目从节目(1)切换为节目(2)(S1014)时，接收装置1005对边缘路由器1004进行离开(leave)当前观看中的节目(1)的频道对应的组播地址的请求(S1015)。然后，接收装置1005进行加入(join)切换目的地的节目(2)的频道对应的组播地址的请求(S1016)。
由此，边缘路由器1004对接收装置1005发送切换目的地的节目(2)流、即S1011的流(S1017)。由此，接收装置1005能够将节目(2)流显示于接收装置1005的显示画面(S1018)。
通过这种频道切换，能够同时接收例如在节目(2)流中多路复用的TLV包以及MMT的控制信息。另外，通过这种频道切换，也存在例如通过频道切换在SI专用组播中也需要接收TLV包以及MMT的控制信息的情况。
图11是在IP再发送服务中的SI专用组播中接收TLV包以及MMT的控制信息的情况的序列例。与图10同样地，IP再发送服务送出服务器1001将S1110所示的节目(1)流、S1111所示的节目(2)流、S1112所示的节目(3)流向IP组播网121发送。
在接收装置1005通过SI专用组播接收TLV包以及MMT的控制信息的情况下， 接收装置1005从选台控制信息服务器1002获取SI专用组播的访问目的地信息(组播地址)(S1113)。接收装置1005使用获取到的访问目的地信息，进行加入(join)SI专用组播的组播地址的请求(S1114)。
由此，SI专用组播S1115从SI服务器1003发送到边缘路由器1004，再从边缘路由器发送到接收装置1005(S1116)。由此，接收装置1005能够获取SI专用组播。
接收装置1005在接收SI专用组播后，进行离开(leave)SI专用组播的组播地址的请求(S1116)。在接收到SI专用组播的接收装置1005中，从所接收到的SI专用组播中提取所需要的TLV包以及MMT的控制信息。接收装置1005，如上所述，能够使用用于识别原先被多路复用的广播信号的流的信息，提取所需要的TLV包以及MMT的控制信息。
虽然说明了本公开的几种实施方式，但这些实施方式是作为例子提示，并不意味着限定本公开的范围。这些新的实施方式能够以其它各种形态来实施，在不超出本公开主旨的范围内，能够进行各种省略、替换和修改变更。这些实施方式和其变形被包含于本公开的范围、主旨内，并且被包含于权利要求记载的本公开及其同等范围内。进一步地，在权利要求的各结构要素中，在将结构要素分割来表现的情况下，或将多个要素配合来表现的情况下，或将这些要素组合来表现的情况下，也属于本公开的范围。另外，在将权利要求作为控制逻辑来表现的情况下、在作为包含使计算机执行的指令的程序来表现的情况下、以及在作为记载所述指令的计算机可读取存储介质来表现的情况下，也适用于本公开的装置。另外，所使用的名称、用语也不是限定，如果存在其它表现但实质上是相同内容、相同主旨，也包含于本公开。

Claims (11)

  1. 一种广播信号发送方法，包括：
    发送所述广播信号，其中，所述广播信号以动态图像专家组媒体传输-类型长度值MMT-TLV方式进行多路复用；
    设定所述广播信号包含的控制信号的信息，其中，所述控制信号的信息包含第一控制信息；
    在所述广播信号被IP再广播的情况下，设定所述广播信号包含的控制信号的信息，包括：
    将从所述广播信号分离出的第一控制信息汇集并向与所述广播信号不同的IP组播的传送路径发送时，将所述第一控制信息的第一识别信息替换为用于识别所述广播信号的第二识别信息，其中，所述第二识别信息与所述第一识别信息的比特长度相同。
  2. 根据权利要求1所述的方法，其中，
    所述控制信号是TLV包或者MMT的控制信号。
  3. 根据权利要求1所述的方法，其中，
    所述第一控制信息是MH-通用数据表MH-CDT或者地址映射表AMT。
  4. 根据权利要求1所述的方法，其中，
    所述第一识别信息是网络标识符network_id、原始网络标识符original_network_id、表标识符扩展table_id_extension中的任一项。
  5. 根据权利要求1所述的方法，其中，
    所述第二识别信息是类型长度值流标识符tlv_stream_id。
  6. 一种广播信号发送方法，包括：
    发送所述广播信号，其中，所述广播信号以MMT-TLV方式进行多路复用；
    设定所述广播信号包含的控制信号的信息，其中，所述控制信号的信息中包含第一控制信息；
    在所述广播信号被IP再广播的情况下，设定所述广播信号包含的控制信号的信息，包括：
    将从所述广播信号分离出的第一控制信息汇集并向与所述广播信号不同的IP组播的传送路径发送时，在所述第一控制信息中增加用于识别所述广播信号的第二识别信息。
  7. 根据权利要求6所述的方法，其中，
    所述控制信号是TLV包或者MMT的控制信号。
  8. 根据权利要求6所述的方法，其中，
    所述第一控制信息是MH-CDT或者AMT。
  9. 根据权利要求6所述的方法，其中，
    所述第二识别信息是tlv_stream_id。
  10. 一种广播信号发送设备，包括：
    存储器，存储有计算机程序；和
    处理器，被配置为执行所述计算机程序以实现权利要求1至5中任一项所述的广播信号发送方法。
  11. 一种广播信号发送设备，包括：
    存储器，存储有计算机程序；和
    处理器，被配置为执行所述计算机程序以实现权利要求6至9中任一项所述的广播信号发送方法。
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