JP2018067768A - Receiver, retransmission device, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow content broadcast by MMT/TLV together with information transmitted by TLV-SI to be distributed (re-broadcast) over an IP network.SOLUTION: A receiver includes a communication unit and a station selection information establishment unit. The communication unit communicates with the outside via a network. The station selection information establishment unit obtains, via the communication unit, station selection control information for the communication unit to receive content transmitted in accordance with MMTP (MPEG Media Transport Protocol).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a receiver, a retransmission apparatus, and a program.

  The spread of a system for distributing video content using MMT (MPEG Media Transport) is expected. As a specific example, MMT is used in 8K SHV (Super Hi-Vision) broadcasting by satellite. MMTP (MPEG Media Transport Protocol), which is a protocol for performing transmission by MMT, uses IP as a lower layer protocol. In other words, unlike conventional television broadcast transmission, MMT transmission has good compatibility with communication lines such as the Internet. Therefore, as a matter of course, it is expected that the MMT packet can be transmitted as it is via the communication line without being converted into another transmission method.

  Non-Patent Document 1 describes a transmission method using MMT.

"Media transport system using digital media broadcasting (MMT-BASED MEDIA TRANSPORT SCHEME IN DIGITAL BROADCASTING SYSTEMS) ARIB STD-B60 version 1.7", Radio Industry Association of Japan, 2016 (June 2016) Day

  However, in order to construct a system for receiving MMTP packets transmitted as broadcast signals and rebroadcasting them over an IP network when transmitting video content or the like by MMT over a communication line such as the Internet, the following is required. Challenges exist.

The first problem is that, in the initial state, the IP address for receiving a specific content to be received is unknown on the receiver side.
The second problem is that there is a lack of a mechanism for transmitting a part of control information for receiving content described later over an IP network. Specifically, in advanced broadband satellite digital broadcasting, which is one of the systems that distribute video and the like by MMTP, information other than TLV-SI (TLV-NIT and AMT) is transmitted in MMTP packets regarding control information. -SI is to be transmitted in a TLV packet. That is, even if the rebroadcast system retransmits only the MMTP packet, there is a problem that information necessary for the EPG configuration cannot be acquired because TLV-SI information is lost.

  The present invention has been made on the basis of the above problem recognition, and intends to provide a receiver, a retransmission apparatus, and a program that can be distributed and viewed, including TLV-SI information. Is.

  [1] In order to solve the above problems, a receiver according to an aspect of the present invention provides a communication unit that communicates with the outside via a network, and a selection for the communication unit to receive content transmitted by MMTP. A channel selection information establishment unit that acquires station control information via the communication unit, and a back-end processing unit that performs a process of extracting an MMT asset included in the content from the content received by the communication unit. It is characterized by comprising.

  [2] Further, according to one aspect of the present invention, in the above receiver, the channel selection information establishment unit extracts a TLV packet stored in a packet received by the communication unit, and includes a TLV included in the TLV packet. The channel selection control information is acquired from the control information of SI.

  [3] Further, according to an aspect of the present invention, in the above receiver, the channel selection information establishing unit includes a packet belonging to a stream different from a packet storing the content among packets received by the communication unit. The TLV-SI control information is extracted from the TLV-SI, and the channel selection control information is acquired from the TLV-SI control information.

  [4] Further, according to one aspect of the present invention, in the above receiver, the channel selection information establishing unit accesses the network configuration information server based on location information stored in advance in the network configuration information server, and Obtaining the location information of the CDN configuration information server from the network configuration information server, accessing the CDN configuration information server based on the location information of the CDN configuration information server, and obtaining the location information of the PF configuration information server from the CDN configuration information server Obtaining, accessing the PF configuration information server based on the location information of the PF configuration information server, acquiring location information of the channel selection control information server from the PF configuration information server, and location information of the channel selection control information server Based on the channel selection control information server, the channel selection control information server Acquiring the selection control information from the bar, characterized in that.

  [5] Further, according to one aspect of the present invention, in the above receiver, the channel selection information establishing unit accesses the CDN configuration information server based on location information of a CDN configuration information server stored in advance, Obtain location information of the PF configuration information server from the CDN configuration information server, access the PF configuration information server based on the location information of the PF configuration information server, and locate the location control information server from the PF configuration information server The channel selection control information server is accessed based on the location information of the channel selection control information server, and the channel selection control information is acquired from the channel selection control information server.

  [6] Further, according to one aspect of the present invention, in the above receiver, the channel selection information establishing unit accesses the portal server based on location information of an external portal server stored in advance, and the portal server The channel selection control information is acquired from

  [7] Further, according to one aspect of the present invention, channel selection control information for a computer including a communication unit that communicates with the outside via a network to receive content transmitted by MMTP by the communication unit is provided. A program for functioning as a channel selection information establishment unit acquired via the communication unit, and a back-end processing unit that performs processing for extracting an MMT asset included in the content from the content received by the communication unit. is there.

  [8] Further, according to one aspect of the present invention, there is provided a retransmission apparatus that re-broadcasts content included in a received broadcast signal via an IP network, and extracts a TLV packet included in the broadcast signal, and the TLV packet Rewrites the address information in the TLV-SI control information included in the IP network for transmission in the IP network, stores the rewritten TLV-SI control information including the TLV-SI control information in the IP packet, and passes the IP network via the IP network. It is a retransmitting device for sending.

  [9] One embodiment of the present invention is a retransmission apparatus that re-broadcasts content included in a received broadcast signal via an IP network, extracts a TLV packet included in the broadcast signal, and extracts the TLV packet. The MMT / IP layer packet extracted from the IP network is sent as the first stream of the IP network, and the address information in the TLV-SI control information included in the TLV packet is rewritten and rewritten for transmission in the IP network. The retransmission apparatus stores the TLV-SI control information in an IP packet and transmits the IP network in a second stream.

  [10] Further, according to one aspect of the present invention, there is provided a retransmission apparatus that re-broadcasts the content included in the received broadcast signal via the IP network, and receives the MMTP packet based on the TLV packet included in the received broadcast signal. Restore and send the MMTP packet on an IP packet to the IP network and transmit tuning control information including location information for the receiver to receive the content from a server accessible from the receiver side The re-transmission device.

  According to the present invention, the MMTP packet included in the broadcast signal can be rebroadcasted without being converted, and channel selection control information can be correctly acquired on the receiver side. That is, it is possible to rebroadcast without changing the quality of the broadcast video content.

It is a block diagram which shows schematic function structure of the receiver by one Embodiment of this invention. It is the schematic which shows the structural example of the content transmission system by the embodiment. It is the schematic which shows the structure of the system for delivering a video content via an internet line by the 1st system by the embodiment. It is the schematic which shows the structure of the system for delivering a video content via an internet line by the 2nd system by the embodiment. It is the schematic which shows the structure of the system for delivering a video content via an internet line by the 3rd system by the embodiment. It is the schematic which shows the structure of the system for delivering a video content via an internet line by the 4th system by the embodiment. It is the schematic which shows the structure of the system for delivering a video content via an internet line by the 5th system by the embodiment. It is the schematic which shows the structure of the system for delivering a video content via an internet line by the 6th system by the embodiment. It is the schematic which shows the structure of the system for delivering a video content via an internet line by the 7th system by the embodiment. It is the schematic showing the data structure of the local station delivery information in the embodiment. It is the schematic showing the correspondence of the value of the code point in the embodiment, and the encoding algorithm of FEC. It is the schematic which shows the data structure of the address map table (AMT) in the embodiment. It is the schematic which shows the data structure of channel selection control information stored in the area | region of the private data byte of the address map table (AMT) in the embodiment. It is a flowchart which shows the procedure of the process for the receiver by the same embodiment to establish channel selection information.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a schematic functional configuration of a receiver according to the present embodiment. As illustrated, the receiver 1 includes a broadcast demodulation unit 11, a communication unit 12, a channel selection information establishment unit 14, an application execution unit 17, a network establishment unit 18, a back-end processing unit 20, and a display process. Part 30. Each of these units is realized using an electronic circuit. Below, the function of each part is demonstrated.

The broadcast demodulator 11 receives a broadcast signal and demodulates the received broadcast signal. The broadcast signal is transmitted from a broadcasting station facility as an airwave or via a cable of a cable television. Note that the content received by the broadcast demodulation unit 11 is transmitted by MMTP.
The communication unit 12 communicates with an external device or the like via a communication line. The communication unit 12 performs communication with an external device or the like using, for example, an Internet protocol (IP). Of the data received by the communication unit 12, the content data such as video and audio is transmitted by MMTP.

The channel selection information establishment unit 14 is channel selection control information for receiving television broadcast content received by the broadcast demodulation unit 11 or video content received by communication performed by the communication unit 12 (for example, rebroadcast of television broadcast). Channel selection control information is acquired from an appropriate location. Thereby, the channel selection information establishment unit 14 establishes channel selection control information necessary for the receiver 1 to select a channel so that the broadcast demodulation unit 11 and the communication unit 12 can use them. Specifically, the channel selection information establishing unit 14 transmits channel selection control information necessary for the communication unit 12 to receive the content transmitted by the receiver 1 using MMTP to be received via the communication unit 12. To get. In particular, the channel selection information establishing unit 14 acquires channel selection control information extracted from the IP packet received by the communication unit 12.
The channel selection control information specifically refers to IP address information, port number information, information related to the encoding method of content such as video, and encoding for receiving multicast content. Information such as parameters.
The channel selection control information is a part of TLV-SI in a broadcast signal transmitted by a TLV packet. TLV-SI is control information related to the TLV multiplexing method. The TLV-SI is composed of a TLV-NIT (TLV network information table) and an address map table (AMT). TLV-NIT stores information about a physical network. The address map table provides information that associates a service identifier that identifies a broadcast program number with an IP packet.

  The application execution unit 17 has a function of executing an application program (also referred to as “application”). For example, the application execution unit 17 is realized by a web browser program including a Java Script (registered trademark) virtual machine and an execution environment for executing the program. An execution environment for executing the program includes a CPU (Central Processing Unit) and a memory.

  The network establishing unit 18 establishes a communication path with an external device or the like such as the channel selection information establishing unit 14 or the back-end processing unit 20 described later via the communication unit 12. Specifically, the network establishment unit 18 establishes a session with the server device based on the location information (URI) of the external server device. The network establishing unit 18 closes the communication path of the server device when the communication path established with the external server device becomes unnecessary.

The back-end processing unit 20 has a function of executing a back-end process for presenting video content (including video and audio) received as a broadcast signal or communication data to a viewer. The back end processing unit 20 includes a descrambling unit 21, a decoding unit 22, an MMT / IP processing unit 23, and a control information processing unit 24. The back-end processing unit 20 passes the decoded video and audio to the display processing unit 30.
Note that one of the main processes of the back-end processing unit 20 is a process of extracting MMT assets included in the content from the content received by the broadcast demodulation unit 11 and the communication unit 12.

When the received content is scrambled (scrambled), the descrambling unit 21 descrambles the content using a predetermined key or the like.
The decoding unit 22 decodes the received encoded content.
The MMT / IP processing unit 23 processes MMT / IP protocol layer packets received by broadcasting or communication. As a result, the MMT / IP processing unit 23 extracts various contents such as video, audio, and caption text from the MMTP packet.
The control information processing unit 24 extracts control information related to content transmission and decoding from the received data, and performs control according to the control information.

  The display processing unit 30 receives the decoded video and audio signals from the back-end processing unit 20, outputs the video to a display device or the like, and outputs the audio to a speaker or an earphone.

The receiver 1 configured as described above is capable of receiving video content by both broadcasting and communication using MMT / IP as a common interface. MMT is an abbreviation for MPEG Media Transport. MMT uses IP as a lower protocol. That is, the broadcast demodulation unit 11 receives and demodulates a broadcast signal including a packet based on MMT / IP. The communication unit 12 receives a packet based on MMT / IP.
That is, the receiver 1 is a broadcast communication shared receiver using MMT / IP as a common interface. As a result, the receiver 1 can receive video content of the same quality as broadcast by communication. In addition, the receiver 1 can share CAS (Conditional Access System), EPG (Electronic Program Guide), and the like between broadcasting and communication. Furthermore, in the receiver 1, the back-end processing unit 20 can be shared between broadcasting and communication, and the cost can be reduced.

FIG. 2 is a schematic diagram illustrating a configuration example of a content transmission system including the receiver 1.
This content transmission system includes at least an IPTV provider facility, an Internet line, a home transmission facility, and a home receiver. IPTV is an abbreviation for Internet Protocol TV. This figure shows a configuration for playing back content using a receiver installed in the home as an example. However, the location where the receiver is installed is not limited to the home, and it may be an office or public It may be a space.

An IPTV provider carries out a business of distributing video content using an IP network as a transmission path. The IPTV operator's equipment includes a satellite demodulator and a program archive, as shown. The satellite demodulator demodulates the received satellite broadcast signal and passes the broadcast signal to the IP transmission device. The IP transmission device transmits a broadcast signal passed from the satellite demodulator using the Internet protocol. At this time, the IP transmission apparatus transmits the broadcast signal as rebroadcast content as MMT / IP without converting the broadcast signal. Note that not only the satellite broadcast signal but also the broadcast signal received by other means (for example, the received terrestrial broadcast signal) may be transmitted by the IP transmission device. Thereby, the equipment of the IPTV provider can rebroadcast (retransmit) the received broadcast signal.
The program archive is an apparatus for accumulating and storing video content. The program archive stores a large amount of video content on a magnetic hard disk or the like. What is stored in the program archive is, for example, the independent content of the IPTV provider. Then, the program archive passes the video content to be distributed to the IP transmission device. Thereby, the IP transmission device can also transmit the stored video content.

  The Internet line is a communication line provided by an Internet service provider, for example. Here, the Internet line is, for example, a 10 Gbps (Gigabit per second) class high-speed Internet line, and can transmit broadband content. For example, the Internet line has a capacity for simultaneously transmitting so-called 8K TV (horizontal 7680 × vertical 4320 pixel) video content for multiple channels. Further, the Internet line transmits not only video content traffic but also other general traffic.

The transmission equipment in the home for communication includes, for example, an optical network unit (ONU) and a home network. Among the transmission facilities in the home, the home network may use either an existing wired or wireless home LAN (local area network). In the home network, a plurality of receivers may be connected under the optical line termination device. The optical line terminator, which is one of the transmission equipment in the home, selects only the video signal of the channel requested by the receiver 1 from the SHV video signal (8KTV) as the multi-channel video signal, for example. Transmit on the internal network. Each receiver can receive video content data using the Internet protocol using a bandwidth of several hundred Mbps (megabits per second) of the home network.
In addition, the equipment in the home includes equipment for receiving broadcast signals (for example, an antenna for receiving satellite broadcast signals). That is, the receiver 1 can receive video content transmitted via the Internet line, and can also receive video content transmitted as a broadcast signal.

  Note that both video content transmitted via the Internet line and video content transmitted as a broadcast signal are transmitted by MMT / IP.

Below, the structure of the system for enabling the receiver 1 to correctly acquire the channel selection control information and thereby correctly receiving the distributed video content, and the operation of the receiver 1 in the system will be described.
The following system configuration has seven configurations from the first method to the seventh method.

<First method: IP transmission of received TLV>
FIG. 3 is a schematic diagram of a configuration for distributing video content via the Internet line according to the first method.
The equipment of the first type IPTV service provider (specifically, for example, the IP transmission apparatus shown in FIG. 2) stores the TLV packet included in the received broadcast signal in the IP packet and stores the Internet line (IP network). , Content Delivery Network, Content Delivery Network, CDN). As a result, the entire TLV packet including the TLV-SI information is stored in the IP packet and can be transmitted over the Internet line.
In the satellite broadcast signal, the protocol hierarchy has a hierarchical structure including TLV, IP, and MMT from the bottom. The satellite demodulator of the IPTV service provider receives this satellite broadcast signal and demodulates it. The IPTV service provider's IP transmission device stores the TLV packet in a lower-layer IP packet and transmits it. That is, the IP TV service provider's IP transmission device stores TLV-SI information in an IP packet and transmits it. At this time, the IP transmission device of the IPTV service provider replaces the address information in the TLV-SI (in the AMT) with the address information for the Internet line from the address information for broadcasting.
Further, the receiver that has received the IP packet transmitted from the IP transmission device of the IPTV service provider restores the TLV packet from the data included in the IP packet (lowermost IP packet). Thereby, the receiver can acquire information equivalent to the TLV packet obtained by demodulating the satellite broadcast signal. That is, since the receiver can acquire the TLV-SI information from the received IP packet, the EPG can be configured. Then, the receiver restores the video content from these TLV packets and presents it on a display screen or the like.

  That is, the configuration example of the retransmission system on the IPTV provider side of the first method is a retransmission system that rebroadcasts the content included in the received broadcast signal via the IP network. Then, the retransmission system extracts the TLV packet included in the broadcast signal, and rewrites the address information in the TLV-SI control information included in the extracted TLV packet for transmission on the IP network. Then, the TLV packet including the rewritten TLV-SI control information is stored in an IP packet and transmitted via the IP network.

  Further, the channel selection information establishing unit 14 of the first method extracts the TLV packet stored in the packet (IP packet) received by the communication unit 12 and selects the channel from the TLV-SI control information included in the TLV packet. Get control information.

<Second scheme: Restoring the MMTP packet from the received TLV and transmitting the TLV-SI information as another packet stream>
FIG. 4 is a schematic diagram of a configuration for distributing video content via the Internet line by the second method.
The equipment of the second type IPTV service provider (for example, the IP transmission apparatus shown in FIG. 2) restores the MMTP packet from the TLV packet included in the broadcast signal received from the satellite broadcast or the like, and converts the restored MMTP packet to the IP A packet (first stream) is loaded and sent to the Internet line (CDN). Then, the equipment of the IPTV service provider stores the TLV-SI information obtained from the received TLV packet in an IP packet of another IP stream (second stream), and sends the stored IP packet to the Internet line. As a result, the entire information stored in the TLV packet including the TLV-SI information is stored in the IP packet of any one of the above streams and transmitted over the Internet line.
The IP packet protocol layer transmitted by the satellite broadcast signal is composed of TLV, IP, and MMT from the bottom. The satellite demodulator of the IPTV service provider receives the satellite broadcast signal, and receives the received satellite broadcast signal. Demodulate. Further, the IP transmission device of the IPTV service provider sends out the MMTP packet obtained by the satellite demodulator of the IPTV service provider as MMTP over IP (the protocol layer has a hierarchical structure of IP and MMT from the bottom). is there.). In addition, the IP TV service provider's IP transmission device separately stores the TLV-SI information in an IP packet and transmits it (the protocol layer has a hierarchical structure of IP and TLV-SI from the bottom). At this time, the IP transmission device of the IPTV service provider changes the address information in the AMT in the TLV-SI from the address information for broadcasting to the address information for the Internet line.
The receiver that receives the IP packet transmitted from the IP transmission device of the IPTV service provider receives the MMTP packet and the TLV-SI information from the IP packet included in the two IP streams indicated by the bold and thin lines in FIG. And restore each. That is, the receiver can acquire the TLV-SI information in the IP packet received from the IP transmission device of the IPTV service provider and configure the EPG. The receiver can restore the acquired video content such as EPG and present it on the display screen of the receiver.

  As described above, the re-transmission system re-broadcasts the content included in the received broadcast signal via the IP network. Also, the retransmission system extracts the TLV packet included in the broadcast signal, and sends out the MMT / IP layer packet extracted from the TLV packet in the first stream of the IP network. Then, the address information in the TLV-SI control information included in the TLV packet is rewritten for transmission in the IP network, the rewritten TLV-SI control information is stored in the IP packet, and the second information is transmitted via the IP network. Send in a stream.

  The channel selection information establishment unit 14 of the receiver 1 in the second scheme controls the TLV-SI from a packet belonging to a different stream from the packet (MMT / IP) storing the content among the packets received by the communication unit 12. Information is extracted, and channel selection control information is acquired from the extracted control information of TLV-SI. That is, in the second method, a stream transmitting a packet storing content and a stream transmitting a packet storing TLV-SI control information are used separately.

<Third scheme: MMTP packet is restored from the received TLV and transmitted, and the TLV-SI information is accessible via the network configuration information server>
FIG. 5 is a schematic diagram of a configuration for distributing video content via the Internet line by the third method. Hereinafter, it demonstrates along this figure.
In the third method, the equipment of the IPTV service provider (for example, the IP transmission device shown in FIG. 2) restores the MMTP packet from the TLV packet included in the broadcast signal received from the satellite broadcast or the like, and the restored MMTP packet It is put on an IP packet and sent to the Internet line (CDN).
The equipment of the IPTV service provider discloses TLV-SI information on the channel selection control information server. The channel selection control information server provides channel selection control information to each receiver in response to a request from each receiver of the receiver A, the receiver B, or the receiver C.
FIG. 5 shows the case where there are multiple CDNs (CDN1 and CDN2). Here, the equipment of the three parties, IPTV service providers A, B, and C, is configured to distribute video content through the PF via the CDN 1 respectively. In addition, the IPTV service provider A is configured to distribute video content through the PF via the CDN 2. The IPTV service provider A can be accessed from the network by providing a channel selection control information server. The tuning control information server of the IPTV service provider A can provide tuning control information to the receiver in response to a request from the receiver. Each receiver holds location information (for example, URI (Uniform Resource Identifier)) of the network configuration information server (NW configuration information server) in advance. Each receiver acquires the location information (for example, URI) of the CDN configuration information server of the desired CDN from the network configuration information server. Each receiver acquires location information (for example, URI) of the PF configuration information server of the target PF from the CDN configuration information server. Each receiver acquires location information (for example, URI) of the channel selection control information server from the PF configuration information server. Each receiver acquires channel selection control information of a desired service (station or channel) from the channel selection control information server.

  In the third method, the main operation of the receiver 1 is as follows. The channel selection information establishing unit 14 accesses the network configuration information server based on the location information stored in advance in the network configuration information server, and acquires the location information of the CDN configuration information server from the accessed network configuration information server. Then, the channel selection information establishing unit 14 accesses the CDN configuration information server based on the location information of the CDN configuration information server, and acquires the location information of the PF configuration information server from the accessed CDN configuration information server. Further, the channel selection information establishing unit 14 accesses the PF configuration information server based on the acquired location information of the PF configuration information server, acquires location information of the channel selection control information server from the PF configuration information server, and acquires the location information. The tuning control information server is accessed based on the location information of the tuning control information server. And tuning control information is acquired from the accessed tuning control information server.

  The feature of the third method in the present embodiment is that a network configuration information server is provided, and the receiver holds the location information (URI) of the network configuration information server in advance. As a result, the receiver can access the network configuration information server. Further, the receiver can acquire the location information (URI) of the CDN configuration information server of the available CDN based on the information received from the network configuration information server. Furthermore, the receiver can acquire the channel selection control information by tracing from the CDN configuration information server, and can acquire the TLV-SI information, so that the EPG can be configured, and the receiver can restore the video content. And can be presented on a display screen or the like.

<4th-7th systems>
Each method from the fourth method to the seventh method embeds server location information (for example, URI) for acquiring TLV-SI information in an application executed on the receiver in advance. By executing the application, the receiver accesses the necessary TLV-SI information. The application executed on the receiver is an application for acquiring EPG information, and is also referred to as “EPG application”. In addition, each method of the 4th method to the 7th method differs in each mode of the location information embedded in the application. Specifically, the location information embedded in the application by each method is as follows.

<Fourth scheme: MMTP packet is restored from the received TLV and transmitted, and TLV-SI information can be accessed from the application specific to the Internet service provider via the CDN configuration information server>
FIG. 6 is a schematic diagram of a configuration for distributing video content via the Internet line according to the fourth method. Hereinafter, it demonstrates along this figure.
In the fourth method, the equipment of the IPTV service provider (for example, the IP transmission device shown in FIG. 2) restores the MMTP packet from the TLV packet included in the received broadcast signal, and converts the restored MMTP packet into an IP packet. Place it on the Internet (CDN).
Each CDN constituting the Internet line in FIG. 6 has a CDN configuration information server. Each of the receivers A, B, and C can access the CDN configuration information server using the URI embedded in the provider-specific application. The provider-specific application is an application provided by each provider that provides Internet services. The provider specific application stores in advance the URI of the CDN configuration information server provided in the network of each provider. Each receiver acquires the location information (URI) of the PF configuration information server from the CDN configuration information server. Each receiver accesses the PF configuration information server, and acquires location information (URI) of the channel selection control information server from the PF configuration information server. Thereby, each receiver can access the channel selection control information server. The channel selection control information server provides channel selection control information to each receiver in response to a request from each receiver. Each receiver can acquire channel selection control information of a desired service from the channel selection control information server.
In this way, each receiver can receive video content via the Internet line and present the received video content to the user.

  In the fourth system, the main operation of the receiver 1 is as follows. The channel selection information establishment unit 14 accesses the CDN configuration information server based on the location information of the CDN configuration information server stored in advance in a storage unit (not shown), and acquires the location information of the PF configuration information server from the accessed CDN configuration information server. To do. Then, the channel selection information establishing unit 14 accesses the PF configuration information server using the acquired location information of the PF configuration information server, and acquires the location information of the channel selection control information server from the accessed PF configuration information server. Further, the channel selection information establishing unit 14 accesses the channel selection control information server from the acquired location information of the channel selection control information server, thereby obtaining the channel selection control information of the video content received from the accessed channel selection control information server. get.

<Fifth method: MMTP packet is restored from the received TLV and transmitted, and the broadcaster's portal server is accessed from the broadcaster's unique application, and the TLV-SI information can be accessed>
FIG. 7 is a schematic diagram of a configuration for distributing video content via the Internet line according to the fifth method. Hereinafter, it demonstrates along this figure.
In the fifth method, the equipment of the IPTV service provider (for example, the IP transmission device shown in FIG. 2) restores the MMTP packet from the TLV packet included in the received broadcast signal, and places the restored MMTP packet on the IP packet. To the Internet line (CDN).
Each broadcaster (broadcasters A, B, and C in the figure) has its own portal server. Broadcasting companies A, B, and C receive their own station distribution information related to distribution of broadcast programs distributed by each broadcasting company via the Internet using receivers A, B, and B. Can be provided to each receiver of machine C. The broadcaster A, B, and C's own station distribution information is described as own station distribution information A, own station distribution information B, and own station distribution information C, respectively. In each receiver, an application unique to each broadcaster (indicated as “each station app” in the figure) is installed in advance, and for example, when receiver A starts an application unique to broadcaster A. The activated application accesses, for example, the portal server of the broadcaster A using the location information (URI) embedded in its own application. Then, the activated application acquires, for example, broadcaster A's own station distribution information from the accessed portal server. Here, the local station distribution information includes channel selection control information. Thereby, for example, the receiver A can receive the video content of the broadcaster A via the Internet line using the channel selection control information acquired by the application. Then, the receiver A can present the received video content to the user.

<Sixth method: Restore and transmit MMTP packets from the received TLV, and access to the TLV-SI information by accessing the portal server that unifies each broadcaster from an application common to multiple broadcasters And>
FIG. 8 is a schematic diagram of a configuration for distributing video content via the Internet line according to the sixth method. Hereinafter, it demonstrates along this figure.
In the sixth method, the equipment of the IPTV service provider (for example, the IP transmission device shown in FIG. 2) restores the MMTP packet from the TLV packet included in the received broadcast signal, and places the restored MMTP packet on the IP packet. To the Internet line (CDN).
Each broadcaster (in the figure, broadcasters A, B, and C) has a portal server for each broadcaster. Each portal server of each broadcaster is configured to provide local station distribution information for distributing the broadcast program of each broadcaster via the Internet. In addition, a common portal server is provided for each broadcaster that unifies each broadcaster. The portal server that unifies each broadcaster acquires each station's distribution information from the portal server of each broadcaster at a predetermined timing. Then, the portal server that unifies the broadcasters collectively publishes the local station distribution information collected from each broadcaster's portal server. A portal server that unifies broadcasters is also referred to as a “broadcaster unified portal server”. On the other hand, an application (denoted as “common app” in the figure) corresponding to the above-described broadcaster unified portal server is installed in the receiver in advance. When each receiver activates the common application, the activated application accesses a portal server that unifies broadcasters using location information (URI) embedded in its own application. And a receiver acquires the delivery information of the broadcaster selected in each broadcaster from the broadcaster unified portal server by the started application. The acquired distribution information includes channel selection control information. Thereby, the receiver can receive the video content from the broadcaster unified portal server via the Internet line using the channel selection control information acquired by the application. The receiver can present the received video content to the user.
In the sixth method, the receiver can access the TLV-SI information by using a common application of each broadcaster, not an application unique to the broadcaster. In that respect, the sixth method is more convenient than the fifth method.

<Seventh method: Restore and transmit MMTP packet from received TLV, access IPTV common portal server from common application of IPTV, and allow access to TLV-SI information via channel selection control information server>
FIG. 9 is a schematic diagram of a configuration for distributing video content via the Internet line according to the seventh method. Hereinafter, it demonstrates along this figure.
In the seventh method, the equipment of the IPTV service provider (for example, the IP transmission device shown in FIG. 2) restores the MMTP packet from the TLV packet included in the received broadcast signal, and places the restored MMTP packet on the IP packet. To the Internet line (CDN).
An IPTV common portal server is provided as a common server for a plurality of IPTV providers. Each IPTV provider stores channel selection control information in a storage unit (not shown) in the channel selection control information server in advance. The IPTV common portal server acquires and stores channel selection control information from the channel selection control information server. Then, the IPTV common portal server collectively publishes the collected channel selection control information. On the other hand, an application corresponding to the above IPTV common portal server (indicated as “IPTV EPG app” in the drawing. An application for acquiring IPTV EPG information) is installed in the receiver in advance. When the receiver activates the application, the application accesses the IPTV common portal server using the location information (URI) embedded in the application. Then, the application acquires channel selection control information of a desired service from the IPTV common portal server. The receiver can receive video content from the IPTV common portal server via the Internet line using the channel selection control information acquired by the application. The receiver can present the received video content to the user.

  The main operations of the receiver 1 from the fifth method to the seventh method are as follows. The channel selection information establishing unit 14 accesses an external portal server based on the location information stored in the external portal server stored in advance, and acquires channel selection control information from the accessed portal server. A broadcast server for each broadcaster (fifth method), a unified broadcaster portal server (sixth method), and an IPTV common portal server (seventh method).

  As described above, the re-broadcast service by IP transmission can be performed without degrading the quality of the broadcast (for example, 8K super high-definition broadcast) transmitted by MMT using any of the first to seventh systems. It can be realized. In addition, it is possible to realize a receiver that can receive content through both broadcast signals and communications, regardless of which Internet service provider the viewer (user of the receiver) has contracted with.

FIG. 10 is a schematic diagram showing a data configuration of the local station distribution information. FIG. 10 shows a data structure using a data expression language having a block structure. For each data item included in the data structure of the local station delivery information, the size (number of bits) of each data and the notation of each data are shown. Further, in FIG. 10, row numbers are given on the left side for convenience. Regarding the above data notation, “uimsbf” represents “unsigned integer, most significant bit first” (unsigned integer, most significant bit first). “Bslbf” represents “bit string, left bit first” (bit string, left bit is first).
The local station distribution information is data used in the already described fifth method (FIG. 7) and sixth method (FIG. 8). The local station distribution information is information related to distribution of content provided by the broadcaster, and holds information when the video content of the local station is distributed (retransmitted) over the Internet line over a plurality of CDNs. In addition, the local station distribution information includes TLV-SI information.
The local station distribution information will be described below with reference to this drawing.

The first line is a declaration indicating the start of the definition of the local station distribution information. The left curly brace in the first row corresponds to the right curly brace in the 37th row. That is, this is one block. “Broadcaster_transmission_info” is an identifier indicating the broadcaster's own station distribution information.
The num_of_CDN (CDN number) on the second line indicates the number of CDNs possessed by the local station distribution information.
The third line is a for sentence indicating the start of a loop for each CDN. The left curly brace in the third row corresponds to the right curly brace in the 36th row. That is, this is a block corresponding to one CDN. This block is repeated the number of times indicated by num_of_CDN (number of CDNs).
The fourth line is cdn_name_length (CDN name length) related to the CDN. The CDN name length indicates the length of the subsequent CDN name in bytes.
The fifth line is a for statement for repeating the number of times represented by the above cdn_name_length (CDN name length). The left curly brace in the fourth row corresponds to the right curly brace in the seventh row. That is, the seventh line is the end of this for sentence.
The sixth line is cdn_name_byte (CDN name byte), which corresponds to each byte (byte) included in the CDN name. A byte string repeated by the for statement in the fifth line indicates the name of the CDN.
The seventh line indicates the end of the for sentence on the fifth line as described above.

The num_of_service_id (service identification number) on the eighth line indicates the number of service_id (service identification) of the broadcaster (broadcaster) distributed in the CDN.
The ninth line is a for statement for repeating the process as many times as indicated by num_of_service_id (number of service identifications). The 9th row left curly brace corresponds to the 35th row right curly brace. That is, the data structure described during this period corresponds to service information identified by service identification (service_id).
The tenth line is service_id (service identification) that serves as a label for identifying the service.
The eleventh line is ip_version (IP version). ip_version (IP version) indicates the version of the IP packet described in the list. If the value is “0”, it indicates IPv4, and if the value is “1”, it indicates IPv6.
The twelfth line shows an area reserved for future use.
The 13th line is service_loop_length (service loop length). This service_loop_length (service loop length) indicates the byte length from immediately after this field to immediately before the next service identification field. This data_loop_length (service loop length) area is provided in order for the data length to be variable depending on the if to else statements from the 14th line to the 25th line.

The 14th line is a part of the if statement, and includes a conditional clause for determining whether or not the value of ip_version is “0”. If this condition is true, the description from the 14th left curly brace to the 19th right curly brace is valid. That is, the definitions from the 15th line to the 18th line are effective when the value of ip_version is “0” (in the case of IPv4).
The 15th line is src_address_32 (source IPv4 address), which describes the source IP address of the IPv4 packet constituting the service.
The 16th line is src_address_mask_32 (source IPv4 address mask), which specifies the number of bits from the effective head (MSB) for the IP address specified as the source IPv4 address. This src_address_mask_32 (source IPv4 address mask) does not take a value larger than 32.
The 17th line is dst_address_32 (destination IPv4 address), which describes the destination IP address of the IPv4 packet constituting the service.
The 18th line is dst_address_mask_32 (destination IPv4 address mask), which specifies the number of bits from the head (MSB) that are valid for the IP address specified as the destination IPv4 address. This dst_address_mask_32 (destination IPv4 address mask) does not take a value larger than 32. Note that the multicast group constituting the service is a multicast group that matches both the source IPv4 address identified as valid by the source IPv4 address mask and the destination IPv4 address identified as valid by the destination IPv4 address mask. To do.
The 19th line is the end of the block from the 14th line.

The 20th line is the start part of the else clause of the if statement on the 19th line. The else clause further has an if statement, and includes a conditional clause for determining whether or not the value of ip_version is “1”. If this condition is true, the description from the left curly brace on the 20th line to the right curly brace on the 19th line is valid. That is, the definitions from the 21st line to the 24th line are effective when the value of ip_version is “1” (in the case of IPv6).
The 21st line is src_address_128 (source IPv6 address), which describes the source IP address of the IPv6 packet constituting the service.
The 22nd line is src_address_mask_128 (source IPv6 address mask), which specifies the number of bits from the effective head (MSB) for the IP address specified as the source IPv6 address. This src_address_mask_128 (source IPv6 address mask) does not take a value larger than 128.
The 23rd line is dst_address_128 (destination IPv6 address), which describes the destination IP address of the IPv6 packet constituting the service.
The 24th line is dst_address_mask_128 (destination IPv6 address mask), which specifies the number of bits from the head (MSB) that are valid for the IP address specified as the destination IPv6 address. This dst_address_mask_128 (destination IPv6 address mask) does not take a value larger than 128. The multicast group constituting the service is a multicast group that matches both the source IPv6 address identified as valid by the source IPv6 address mask and the destination IPv6 address identified as valid by the destination IPv6 address mask. To do.
The 25th line is the end of the block from the 20th line.

The 26th line shows port_No. (Port number) indicating the port number for multicast transmission.
The 27th line is IGMP / MLD_version (multicast group management protocol version). This data indicates the version number of the protocol used in IGMP (Internet Group Management Protocol) in IPv4 and MLD (Multicast Listener Discovery) in IPv6.
The twenty-eighth line shows an area reserved for future use.
The 29th line shows num_of_FEC (number of FEC), which indicates the number of FEC (Forward Error Correction) methods to be applied.
The 30th line is a for statement for a loop for each FEC method. The left curly brace in the 30th row corresponds to the right curly brace in the 33rd row.
The 31st line is FEC_code_point (FEC code point). This data indicates a code point of the FEC system defined by ISO / IEC23008-10. The 32nd line shows FEC_param (FEC parameter). This data shows parameters according to each FEC method. For example, Code point = 6 is designated, and (L parameter, D parameter) is designated as (10, 10), for example. The code points will be further described later.
The 33rd line is the end of the block from the 30th line.
The 34th line is remote_control_key_id (remote control key) indicating the value of the remote control key.

  Note that the right curly braces on the 35th, 36th, and 37th lines correspond to the 9th, 3rd, and 1st left curly braces, respectively.

  When such local station distribution information is provided, the receiver can acquire multicast address information, mask information, and port numbers by acquiring this information.

  FIG. 11 is a schematic diagram showing the correspondence between the code point value included in the local station distribution information and the FEC encoding algorithm. As shown in the figure, the code point value is associated with the encoding algorithm. Specifically, when the code point value is 1, the encoding algorithm is “RS (Reed Solomon)”. When the code point value is 2, the encoding algorithm is “S_LDPC”. When the code point value is 3, the encoding algorithm is “RaptorQ”. When the code point value is 4, the encoding algorithm is “RaptorQ LA”. When the code point value is 5, the encoding algorithm is “FireFort_LDGM”. When the code point value is 6, the encoding algorithm is “SMPTE 2022-1 (Pro-MPEG)”.

FIG. 12 is a schematic diagram showing the data structure of the address map table (AMT).
In the present embodiment, channel selection control information is stored in private data bytes (private_data_byte) defined between the 32nd and 34th lines in this AMT configuration.
A specific configuration of the channel selection control information will be described next.

  FIG. 13 is a schematic diagram showing the data structure of channel selection control information stored in the private data byte area of AMT. FIG. 13 shows a data structure using a data expression language having a block structure. FIG. 13 shows the data size (number of bits) and data notation for each data item included in the data structure. In FIG. 13, for the sake of convenience, row numbers are given on the left side.

The channel selection control information (AMT private data) will be described below with reference to this drawing.
The first line is a declaration indicating the start of the definition of the private data byte. The left curly brace in the first row corresponds to the right curly brace in the eleventh row. That is, this is one block.
The second line is port_No. (Port number). This is data corresponding to the 26th line in FIG.
The third line is IGMP / MLD_version (multicast group management protocol version). This is data corresponding to the 27th line in FIG.
The fourth line shows an area reserved for future use. This corresponds to the 28th line in FIG.
The fifth line is num_of_FEC (FEC number). This corresponds to the 29th line in FIG.
The sixth to ninth lines are loops for defining code points (FEC_code_point) and parameters (FEC_param ()) for each FEC. The sixth to ninth lines are data corresponding to the 30th to 33rd lines in FIG.
The 10th line is remote_control_key_id (remote control key), and corresponds to the 34th line in FIG.

FIG. 14 is a flowchart illustrating a processing procedure for the receiver to establish channel selection information. The receiver 1 executes the processing described in this flowchart when receiving video content by a specific service either via a broadcast signal or via communication. By executing the processing shown in this flowchart, the receiver can establish channel selection information and receive video content that is actually distributed.
Hereinafter, the processing will be described with reference to this flowchart.

  First, in step S101, the channel selection information establishing unit 14 determines whether or not a broadcast is being received. Specifically, the channel selection information establishing unit 14 makes a determination in this step based on a signal indicating the operating status of the broadcast demodulating unit 11 and a signal indicating the operating status of the communication unit 12. If the broadcast is being received (step S101: YES), the process proceeds to step S102. If the broadcast is not being received, that is, if the video content is to be received by communication (step S101: NO), the process proceeds to step S103.

  Next, when the process proceeds from step S101 to step S102 (when broadcasting is being received), the channel selection information establishing unit 14 acquires the TLV-SI from the broadcast demodulating unit 11 in step S102. And the channel selection information establishment part 14 acquires the list | wrist of the group which matched the service and the physical frequency from TLV-NIT in TLV-SI. Further, the channel selection information establishing unit 14 acquires a set in which a service and a multicast address are associated with each other from the AMT in the TLV-SI. When the broadcast is being received, the channel selection information establishing unit 14 is thus in a state in which the channel selection control information is established. And after the process of this step, it moves to the state of step S113.

  On the other hand, when the process proceeds from step S101 to step S103 (when video content is to be received through communication), in step S103, the network establishment unit 18 accesses the CDN. At this time, the CDN accessed by the network establishing unit 18 is the CDN with which the user of the receiver 1 is contracted.

  Next, in step S104, the network establishment unit 18 tries to access the CDN configuration information server of the CDN, and determines whether or not the CDN configuration information server can be accessed. As a result, when the CDN configuration information server can be accessed (step S103: YES), the process proceeds to step S106. If the CDN configuration information server cannot be accessed (step S103: NO), the process proceeds to step S105.

  Next, when the process proceeds to step S105, in step S105, the network establishment unit 18 tries to access the network configuration information server and determines whether the network configuration information server can be accessed. As a result, when the network configuration information server can be accessed (step S105: YES), the process proceeds to step S106. If the network configuration information server cannot be accessed (step S105: NO), the process proceeds to step S111.

  Next, when the process proceeds to step S106, that is, when the access to the network configuration information server is successful, in step S106, the channel selection information establishing unit 14 receives the location information (CDN configuration information server location information (from the network configuration information server). URI). At this time, the channel selection information establishment unit 14 requests and acquires the location information (URI) of the CDN configuration information server of the CDN with which the user of the receiver 1 has contracted, from the network configuration information server.

  When the process proceeds from step S104 or step S106 to step S107, in step S107, the channel selection information establishing unit 14 accesses the CDN configuration information server and acquires the location information (URI) of the PF configuration information server. When the process proceeds from step S106 to step S107, the channel selection information establishing unit 14 accesses the CDN configuration information server using the location information of the CDN configuration information server acquired in step S106.

  Next, in step S108, the channel selection information establishing unit 14 accesses the PF configuration information server using the location information of the PF configuration information server acquired in step S107. Then, the channel selection information establishing unit 14 acquires location information (URI) of the channel selection control information server from the PF configuration information server. That is, in the processing from step S107 to step S108, the channel selection information establishing unit 14 traces the location information of the channel selection control information server based on the CDN configuration information server of the CDN with which the user of the receiver 1 is contracted. Therefore, the location information acquired by the channel selection information establishing unit 14 in this step is the location information of the channel selection control information server in the CDN.

  Next, in step S109, the channel selection information establishing unit 14 accesses the channel selection control information server using the location information of the channel selection control information server acquired in step S108. At this time, the channel selection control information server accessed by the channel selection information establishment unit 14 is a channel selection control information server in the CDN with which the user of the receiver 1 is contracted.

  Next, in step S110, the channel selection information establishing unit 14 acquires channel selection control information from the channel selection control information server accessed in step S109. Then, the channel selection information establishing unit 14 acquires a list of service and multicast address (channel selection control information) pairs included in the channel selection control information. The channel selection information establishment unit 14 is in a state where channel selection information has been established by the processing of this step. That is, after the processing in this step, the process proceeds to step S113.

  On the other hand, when the process proceeds from step S105 to step S111, after step S111, the receiver 1 establishes channel selection control information by the application. In step S111, the receiver 1 causes the application execution unit 17 to execute an application having a function for establishing channel selection control information. The application having the function for establishing the channel selection control information functions as the channel selection information establishing unit 14 by being executed in the application execution unit 17.

In step S112, the application (channel selection information establishing unit 14) executed by the application execution unit 17 accesses a server specified in the application, and acquires own station distribution information or channel selection control information from the server. To do. Alternatively, the application acquires the local station distribution information or the channel selection control information by tracing the information from the designated server and accessing the local station distribution information server or the channel selection control information server.
In each of the fourth method to the seventh method already described, the operation procedure of the application in this step is as follows.
In the fourth method, the application first accesses the CDN configuration information server, and sequentially accesses the CDN configuration information server, accesses the channel selection control information server, and acquires the channel selection control information.
In the fifth method, the application first accesses the portal server of the broadcaster. Then, the application acquires the broadcaster's own station distribution information from the portal server.
In the sixth method, the application first accesses the broadcaster unified portal server. Then, the application acquires location information of the target broadcaster's portal server from the broadcaster unified portal server, and accesses the portal server of the specific broadcaster. Further, the app acquires the broadcaster's own station distribution information from the broadcaster's portal server.
As a modified example of the sixth method, the broadcaster unified portal server may hold the local station distribution information of each broadcaster. In this case, the application accesses the broadcaster unified portal server, and acquires the local broadcast distribution information of the target broadcaster from the broadcaster unified portal server.
In the seventh method, the application first accesses the IPTV common portal server. Then, the application obtains the location information of the channel selection control information server from the IPTV common portal server, and accesses the specific channel selection control information server. Then, the application acquires the channel selection control information from the channel selection control information server.
As a modification of the seventh method, the tuning control information of each service provider may be held in the IPTV common portal server. In this case, the application accesses the IPTV common portal server, and acquires channel selection control information of the target service provider from the IPTV common portal server.

  The application (channel selection information establishing unit 14) is in a state where the channel selection control information has been established by the process of step S112 described above. That is, after the processing in this step, the process proceeds to step S113.

  In step S113, channel selection control information is established. In this state, the receiver 1 acquires video content from a broadcast signal or via communication based on the acquired channel selection control information and presents it to the user.

All the functions of the operation procedure shown in FIG. 14 are not necessarily provided in the receiver 1, and may be configured to have only some functions.
The receiver 1 establishes channel selection control information by performing processing according to either video content received by a broadcast signal or video content received by IP communication. In addition, when receiving video content by IP communication, necessary processing is performed and channel selection control information is established depending on which of the first method to the seventh method described above is used. Specifically, it is as follows.

When receiving video content by a broadcast signal, the receiver 1 establishes channel selection control information by performing the processing of steps S101 → S102 → S113 in the flowchart.
When video content is received by IP communication and the above-described third method is used, the receiver 1 performs steps S101 → S103 → S104 → S105 → S106 → S107 → S108 → S109 → S110 → S113 in the flowchart. The channel selection control information is established by performing the above process.
When the fourth method is used, the receiver 1 establishes channel selection information by performing the processes of steps S101 → S103 → S104 → S107 → S108 → S109 → S110 → S113 in the flowchart. Among these, the processing after step S104 is particularly important.
When any one of the above-described fifth method to seventh method is used, the receiver 1 performs channel selection control by performing the processing of steps S101 → S103 → S104 → S105 → S111 → S112 → S113 in the flowchart. Establish information. Among these, the processing after step S111 is particularly important.

  When distributing video content using the Internet line, it is not necessary to realize all of the first method to the seventh method described above, and only some of these methods may be realized. Good. As for the functional configuration of the receiver and the system on the network side, only necessary functions may be realized in accordance with the method to be realized.

  Note that some or all of the functions of the receiver, the IPTV provider's retransmission system (retransmission device), and other various server devices in the above-described embodiments may be realized by a computer. In that case, a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” is a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, a DVD-ROM, a USB memory, or a storage device such as a hard disk built in a computer system. That means. Furthermore, a “computer-readable recording medium” dynamically holds a program for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory inside a computer system serving as a server or a client in that case may be included and a program held for a certain period of time. The program may be a program for realizing a part of the above-described functions, or may be a program that can realize the above-described functions in combination with a program already recorded in a computer system.

In addition, you may make it implement this embodiment by the following modification.
In the above description, it is assumed that the receiver holds fixed information (for example, location information of a server device to be accessed). In addition, the application installed in the receiver holds fixed information (similarly, the location information of the server device). As a modification, the fixed information may be appropriately updated. Thereby, the operation | movement which can respond flexibly also to the change of a system structure etc. is realizable.
Further, the retransmission system described in the embodiment may be a retransmission apparatus that is realized as a single apparatus. The retransmission system may be a retransmission apparatus realized by combining a plurality of components.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

  The present invention can be mainly used in a content distribution business and a business of manufacturing and selling home appliances, computer servers, network devices, and the like.

DESCRIPTION OF SYMBOLS 1 Receiver 11 Broadcast demodulation part 12 Communication part 14 Channel selection information establishment part 17 Application execution part 18 Network establishment part 20 Back end processing part 21 Descramble part 22 Decoding part 23 MMT / IP processing part 24 Control information processing part 30 Display processing Part

Claims (10)

A communication unit that communicates with the outside via a network;
A channel selection information establishing unit for acquiring channel selection control information for the communication unit to receive content transmitted by MMTP via the communication unit;
A back-end processing unit that performs processing for extracting an MMT asset included in the content from the content received by the communication unit;
A receiver comprising: The channel selection information establishment unit extracts a TLV packet stored in a packet received by the communication unit, and acquires the channel selection control information from TLV-SI control information included in the TLV packet.
The receiver according to claim 1. The channel selection information establishment unit extracts TLV-SI control information from packets belonging to a stream different from the packet storing the content from among the packets received by the communication unit, and controls the TLV-SI control information. Obtaining the tuning control information from
The receiver according to claim 1. The channel selection information establishing unit accesses the network configuration information server based on location information stored in advance in the network configuration information server, acquires location information of the CDN configuration information server from the network configuration information server, and stores the CDN Accessing the CDN configuration information server based on location information of the configuration information server, obtaining location information of the PF configuration information server from the CDN configuration information server, and PF configuration information based on the location information of the PF configuration information server Accessing a server, obtaining location information of a channel selection control information server from the PF configuration information server, accessing the channel selection control information server based on location information of the channel selection control information server, and selecting the channel selection control information. Obtaining the tuning control information from a server;
The receiver according to claim 1. The channel selection information establishing unit accesses the CDN configuration information server based on the location information stored in advance in the CDN configuration information server, acquires the location information of the PF configuration information server from the CDN configuration information server, and the PF The PF configuration information server is accessed based on the location information of the configuration information server, the location information of the channel selection control information server is acquired from the PF configuration information server, and the location information of the channel selection control information server is acquired. Accessing the station control information server, obtaining the channel selection control information from the channel selection control information server,
The receiver according to claim 1. The channel selection information establishing unit accesses the portal server based on location information of an external portal server stored in advance, and acquires the channel selection control information from the portal server.
The receiver according to claim 1. A computer having a communication unit that communicates with the outside via a network,
A channel selection information establishing unit for acquiring channel selection control information for the communication unit to receive content transmitted by MMTP via the communication unit,
A back-end processing unit that performs processing for extracting an MMT asset included in the content from the content received by the communication unit;
Program to function as. A re-transmission device for re-broadcasting content included in a received broadcast signal via an IP network,
Extracting the TLV packet included in the broadcast signal, rewriting the address information in the TLV-SI control information included in the TLV packet for transmission on the IP network, and including the rewritten TLV-SI control information A retransmission apparatus that stores packets in IP packets and transmits the packets via the IP network. A re-transmission device for re-broadcasting content included in a received broadcast signal via an IP network,
The TLV packet included in the broadcast signal is extracted, the MMT / IP layer packet extracted from the TLV packet is transmitted in the first stream of the IP network, and the address in the TLV-SI control information included in the TLV packet A retransmission apparatus that rewrites information for transmission on the IP network, stores the rewritten TLV-SI control information in an IP packet, and transmits the IP network in a second stream. A retransmission device that retransmits content included in a received broadcast signal via an IP network,
Channel selection control including restoring the MMTP packet based on the TLV packet included in the received broadcast signal, placing the MMTP packet on the IP packet and sending it to the IP network, and including location information for the receiver to receive the content A re-transmission apparatus which enables transmission of information from a server accessible from the receiver side.

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