JP6757643B2 - Receivers, retransmission devices, and programs - Google Patents

Description

The present invention relates to receivers, retransmission devices, and programs.

It is expected that a system for distributing video contents using MMT (MPEG Media Transport) will become widespread. 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 transmitting by MMT, uses IP as a lower layer protocol. That is, the transmission by MMT has a good affinity with a communication line such as the Internet, unlike the transmission in the conventional television broadcasting. 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 by MMT.

"MMT-BASED MEDIA TRANSPORT SCHEME IN DIGITAL BROADCASTING SYSTEMS ARIB STD-B60 1.7 version", Association of Radio Industries and Businesses, July 6, 2016 Day

However, when transmitting video content or the like by MMT over a communication line such as the Internet, in order to construct a system for receiving an MMTP packet transmitted as a broadcast signal and rebroadcasting it on an IP network as follows. Challenges exist.

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

The present invention has been made based on the above-mentioned problem recognition, and intends to provide a receiver, a retransmission device, and a program that can be distributed and viewed including TLV-SI information. It is a thing.

[1] In order to solve the above problems, the receiver according to one aspect of the present invention selects a communication unit that communicates with the outside via a network and a communication unit for receiving the 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 MMT assets included in the content from the content received by the communication unit. It is characterized by having.

[2] Further, in 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 the TLV included in the TLV packet. It is characterized in that the channel selection control information is acquired from the control information of −SI.

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

[4] Further, in one aspect of the present invention, in the above receiver, the channel selection information establishment unit accesses the network configuration information server based on the location information of the network configuration information server stored in advance, and the above. The location information of the CDN configuration information server is acquired from the network configuration information server, the CDN configuration information server is accessed based on the location information of the CDN configuration information server, and the location information of the PF configuration information server is obtained from the CDN configuration information server. Acquire, access the PF configuration information server based on the location information of the PF configuration information server, acquire the location information of the channel selection control information server from the PF configuration information server, and perform the location information of the channel selection control information server. The channel selection control information server is accessed based on the above, and the channel selection control information is acquired from the channel selection control information server.

[5] Further, in one aspect of the present invention, in the above receiver, the channel selection information establishment unit accesses the CDN configuration information server based on the location information of the CDN configuration information server stored in advance, and the above-mentioned The location information of the PF configuration information server is acquired from the CDN configuration information server, the PF configuration information server is accessed based on the location information of the PF configuration information server, and the location information of the channel selection control information server is accessed from the PF configuration information server. Is obtained, 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, in one aspect of the present invention, in the above receiver, the channel selection information establishment unit accesses the portal server based on the location information of the external portal server stored in advance, and the portal server. The channel selection control information is acquired from the above.

[7] Further, in one aspect of the present invention, a computer including a communication unit that communicates with the outside via a network is provided with channel selection control information for the communication unit to receive content transmitted by MMTP. , 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 MMT assets included in the content from the content received by the communication unit. is there.

[8] Further, one aspect of the present invention is a retransmission device that re-broadcasts the content included in the received broadcast signal via the IP network, extracts the TLV packet included in the broadcast signal, and extracts the TLV packet. The address information in the control information of the TLV-SI included in is rewritten for transmission in the IP network, and the TLV packet containing the rewritten control information of the TLV-SI is stored in the IP packet and via the IP network. It is a retransmission device that sends out.

[9] Further, one aspect of the present invention is a retransmission device that re-broadcasts the content included in the received broadcast signal via the IP network, extracts the TLV packet included in the broadcast signal, and obtains the TLV packet. The MMT / IP layer packet extracted from the above was sent out in the first stream of the IP network, and the address information in the TLV-SI control information included in the TLV packet was rewritten and rewritten for transmission in the IP network. It is a retransmission device that stores the control information of the TLV-SI in an IP packet and transmits the IP network in a second stream.

[10] Further, one aspect of the present invention is a retransmission device that rebroadcasts the content included in the received broadcast signal via the IP network, and MMTP packets are generated based on the TLV packet included in the received broadcast signal. It is possible to restore and put the MMTP packet on an IP packet and send it to the IP network, and also send channel selection control information including location information for the receiver to receive the content from a server accessible from the receiver side. It is a retransmission device.

According to the present invention, the MMTP packet included in the broadcast signal can be rebroadcast as it is without being converted, and the 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 video content to be broadcast.

It is a block diagram which shows the schematic functional structure of the receiver by one Embodiment of this invention. It is the schematic which shows the configuration example of the content transmission system by the same embodiment. It is a schematic diagram which shows the structure of the system for distributing the video content via the Internet line by the 1st method by this embodiment. It is a schematic diagram which shows the structure of the system for distributing the video content via the Internet line by the 2nd method by this embodiment. It is a schematic diagram which shows the structure of the system for distributing the video content via the Internet line by the 3rd method by this embodiment. It is a schematic diagram which shows the structure of the system for distributing the video content via the Internet line by the 4th method by this embodiment. It is a schematic diagram which shows the structure of the system for distributing the video content via the Internet line by the 5th method by this embodiment. It is a schematic diagram which shows the structure of the system for distributing the video content via the Internet line by the 6th method by the same embodiment. It is the schematic which shows the structure of the system for distributing the video content via the Internet line by the 7th method by the same embodiment. It is a schematic diagram which shows the data structure of the own station distribution information in the same embodiment. It is a schematic diagram which shows the correspondence relationship between the value of the code point in the same embodiment, and the coding algorithm of FEC. It is a schematic diagram which shows the data structure of the address map table (AMT) in the same embodiment. It is a schematic diagram which shows the data structure of the channel selection control information stored in the area of the private data byte of the address map table (AMT) in the same embodiment. It is a flowchart which shows the procedure of the process for the receiver of this embodiment to establish the channel selection information.

Next, one 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 shown in the figure, 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 display processing. A part 30 and the like are included. Each of these parts is realized by using an electronic circuit. The functions of each part will be described below.

The broadcast demodulation unit 11 receives the broadcast signal and demodulates the received broadcast signal. Broadcast signals are transmitted from the equipment of a broadcasting station as an aerial wave or via a cable of a cable television. 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 communicates with an external device or the like by using, for example, an Internet Protocol (IP). Of the data received by the communication unit 12, the video and audio content data is transmitted by MMTP.

The channel selection information establishment unit 14 is the channel selection control information for receiving the TV broadcast content received by the broadcast demodulation unit 11, or the video content received by the communication performed by the communication unit 12 (for example, rebroadcast of the TV broadcast). Acquire the channel selection control information of each from an appropriate place. As a result, the channel selection information establishment unit 14 establishes the 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 it. Specifically, the channel selection information establishment unit 14 transmits the channel selection control information necessary for the communication unit 12 to receive the content transmitted by the MMTP to be received by the receiver 1 via the communication unit 12. To get. In particular, the channel selection information establishment unit 14 acquires the channel selection control information extracted from the IP packet received by the communication unit 12.
Specifically, the channel selection control information includes IP address information, port number information, information on a content coding method such as video, and coding for receiving multicast content. Information such as parameters.
The channel selection control information is a part of TLV-SI in the broadcast signal transmitted by the TLV packet. TLV-SI is control information related to the TLV multiplexing method. The TLV-SI is composed of a TLV-NIT (network information table for TLV) and an address map table (AMT). The TLV-NIT stores information about the physical network. The address map table provides information that associates the service identifier that identifies the broadcast program number with the IP packet.

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

The network establishment unit 18 establishes a communication path between the channel selection information establishment unit 14 or an external device such as 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 establishment unit 18 closes the communication path of the server device when the communication path established with the external server device is no longer needed.

The back-end processing unit 20 has a function of executing back-end processing 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 descramble 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.
One of the main processes of the back-end processing unit 20 is to perform 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, the descramble unit 21 descrambles the content by using a predetermined key or the like.
The decoding unit 22 decodes the received coded content.
The MMT / IP processing unit 23 processes packets in the MMT / IP protocol layer received by broadcasting or communication. As a result, the MMT / IP processing unit 23 extracts various contents such as video, audio, and subtitle 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 or the like.

The receiver 1 having the above configuration can receive 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 layer protocol. That is, the broadcast demodulation unit 11 receives and demodulates the broadcast signal including the packet by MMT / IP. In addition, the communication unit 12 receives the MMT / IP packet.
That is, the receiver 1 is a broadcast communication shared receiver having MMT / IP as a common interface. As a result, the receiver 1 can receive video content of the same quality as broadcasting by communication. Further, the receiver 1 can be shared between broadcasting and communication, such as CAS (Conditional Access System) and EPG (Electronic Program Guide). Further, 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 view showing a configuration example of a content transmission system including a receiver 1.
This content transmission system includes at least the equipment of the IPTV operator, the Internet line, the transmission equipment in the home, and the receiver in the home. IPTV is an abbreviation for Internet Protocol TV. The figure shows, for example, a configuration for playing content by a receiver installed in the home, but the place where the receiver is installed is not limited to the home, but is not limited to the home, but is also used in offices and public. It may be a space.

The IPTV operator conducts a business of distributing video contents 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 the broadcast signal passed from the satellite demodulator by the Internet protocol. At this time, the IP transmission device transmits the broadcast signal as the rebroadcast content as it is as MMT / IP without converting it. In addition to the satellite broadcast signal, the IP transmission device may transmit a broadcast signal (for example, the received terrestrial broadcast signal) received by other means. As a result, the equipment of the IPTV operator can rebroadcast (retransmit) the received broadcast signal.
The program archive is a device for accumulating and storing video contents. 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 operator. Then, the program archive passes the video content to be distributed to the IP transmission device. As a result, the IP transmission device can also transmit the stored video content.

The internet line is, for example, a communication line provided by an internet service provider. Here, the Internet line is, for example, a high-speed Internet line of 10 Gbps (Gigabit per second) class, and can transmit wideband content. For example, the Internet line has a capacity to simultaneously transmit so-called 8KTV (horizontal 7680 x vertical 4320 pixels) video content for multiple channels. In addition, the Internet line transmits not only the traffic of video contents but also other general traffic.

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

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

The configuration of the system for the receiver 1 to correctly acquire the channel selection control information and thereby correctly receive the delivered video content and the operation of the receiver 1 in the system will be described below.
The following system configurations are seven configurations from the first method to the seventh method.

<First method: Received TLV is converted to IP and transmitted>
FIG. 3 is a schematic diagram of a configuration for distributing video content via an Internet line by the first method.
The equipment of the IPTV service provider of the first method (specifically, for example, the IP transmission device 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). , Contents Delivery Network, Contents Delivery Network, CDN). As a result, the entire TLV packet including the TLV-SI information can be stored in the IP packet and transmitted over the Internet line.
In the satellite broadcasting signal, the protocol layer has a layered structure consisting of TLV, IP, and MMT from the bottom. The satellite demodulator of the IPTV service provider receives and demodulates this satellite broadcast signal. The IP transmission device of the IPTV service provider stores the TLV packet in an IP packet of a lower layer and transmits the TLV packet. That is, the IP transmission device of the IPTV service provider also stores the TLV-SI information in the IP packet and transmits it. At this time, the IP transmission device of the IPTV service provider replaces the address information in TLV-SI (during AMT) with the address information for the Internet line from the address information for broadcasting.
Further, the receiver that receives 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 (the IP packet of the lowest layer). As a result, 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 those TLV packets and presents it on the display screen or the like.

That is, the configuration example of the retransmission system on the side of the IPTV operator 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 control information of the TLV-SI included in the extracted TLV packet for transmission in the IP network. Then, the TLV packet including the rewritten control information of the TLV-SI is stored in the IP packet and transmitted via the IP network.

Further, the channel selection information establishment 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 method: MMTP packet is restored from the received TLV, and TLV-SI information is transmitted as another packet stream>
FIG. 4 is a schematic diagram of a configuration for distributing video content via an Internet line by the second method.
The equipment of the IPTV service provider of the second method (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 satellite broadcasting or the like, and IPs the restored MMTP packet. It is put on a packet (first stream) and sent to an Internet line (CDN). Then, the equipment of the IPTV service provider stores the TLV-SI information obtained from the received TLV packet in the 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 of the above streams and transmitted on the Internet line.
The protocol layer of the IP packet transmitted by the satellite broadcasting signal is composed of TLV, IP, and MMT from the bottom, and the satellite demodulator of the IPTV service provider receives this satellite broadcasting signal and receives the received satellite broadcasting signal. Demodulate. Further, the IP transmission device of the IPTV service provider transmits the MMTP packet obtained by the satellite demodulator of the IPTV service provider as MMTP on the IP (the protocol layer has a hierarchical structure of IP and MMT from the bottom). is there.). Further, the IP transmission device of the IPTV service provider separately stores the TLV-SI information in an IP packet and transmits it (the protocol hierarchy is a hierarchical structure of IP and TLV-SI from the bottom). At this time, the IP transmission device of the IPTV service provider replaces 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 received the IP packet sent from the IP transmission device of the IPTV service provider is the MMTP packet and TLV-SI information from the IP packet included in the two IP streams shown by the thick line and the thin line in FIG. And restore each. That is, the receiver can configure the EPG by acquiring the TLV-SI information in the IP packet received from the IP transmission device of the IPTV service provider. The receiver can restore the acquired video content such as the EPG and present it on the display screen or the like of the receiver.

In this way, the retransmission system rebroadcasts the content included in the received broadcast signal via the IP network. Further, the retransmission system extracts the TLV packet included in the broadcast signal, and transmits the packet of the MMT / IP layer 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 on the IP network, the rewritten control information of the TLV-SI is stored in the IP packet, and the second is performed via the IP network. Send as a stream.

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

<Third method: MMTP packets are restored from the received TLV and transmitted, and TLV-SI information can be accessed via the network configuration information server>
FIG. 5 is a schematic diagram of a configuration for distributing video content via an Internet line by the third method. Hereinafter, description will be made with reference to 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 satellite broadcasting or the like, and restores the restored MMTP packet. It is put on an IP packet and sent to an Internet line (CDN).
The equipment of the IPTV service provider publishes TLV-SI information on the channel selection control information server. Then, this channel selection control information server provides channel selection control information to each receiver in response to a request from each receiver of receiver A, receiver B, or receiver C.
FIG. 5 shows a case where a plurality of CDNs (CDN1 and CDN2) are present. Here, the facilities of the three IPTV service providers A, B, and C are configured to distribute the video content through the PF via the CDN1. Further, the IPTV service provider A is configured to distribute the video content through the PF via the CDN2. The IPTV service provider A can access from the network by providing a channel selection control information server. The channel selection control information server of the IPTV service provider A can provide channel selection control information to the receiver in response to a request from the receiver side. In addition, each receiver holds the location information (for example, URI (Uniform Resource Identifier)) of the network configuration information server (NW configuration information server) in advance. Then, 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. Then, each receiver acquires the location information (for example, URI) of the PF configuration information server of the target PF from the CDN configuration information server. Then, each receiver acquires the location information (for example, URI) of the channel selection control information server from the PF configuration information server. Then, each receiver acquires the channel selection control information of the desired service (station or channel) from the channel selection control information server.

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

The feature of the third method in this embodiment is that a network configuration information server is provided so that the receiver holds the location information (URI) of the network configuration information server in advance. This allows the receiver to access the network configuration information server. In addition, 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. Further, the receiver can configure the EPG by acquiring the channel selection control information and the TLV-SI information by tracing from the CDN configuration information server, and the receiver restores the video content. It can be presented on the display screen or the like.

<4th to 7th methods>
In each of the 4th to 7th methods, the location information (for example, URI) of the server for acquiring the TLV-SI information is embedded in the application executed on the receiver in advance, and the method is used. 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 called an "EPG application". In addition, in each method of the 4th method to the 7th method, the mode of the location information embedded in the application is different in each method. Specifically, the location information embedded in the application by each method is as follows.

<Fourth method: MMTP packets are restored from the received TLV and transmitted, and TLV-SI information can be accessed from the Internet service provider-specific application via the CDN configuration information server>
FIG. 6 is a schematic diagram of a configuration for distributing video content via an Internet line by the fourth method. Hereinafter, description will be made with reference to 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. It is loaded and sent to the Internet line (CDN).
Each CDN constituting the Internet line of FIG. 6 has a CDN configuration information server. Each receiver of receiver A, receiver B, and receiver C can access the CDN configuration information server by using the URI embedded in the provider-specific application. The provider-specific application is an application provided by each provider that provides an Internet service. The provider-specific application stores the URI of the CDN configuration information server provided in each provider's network in advance. Each receiver acquires the location information (URI) of the PF configuration information server from the CDN configuration information server. Then, each receiver accesses the PF configuration information server and acquires the location information (URI) of the channel selection control information server from the PF configuration information server. As a result, 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 the video content via the Internet line and present the received video content to the user.

In the fourth method, the main operations of the receiver 1 are 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 establishment unit 14 accesses the PF configuration information server based on 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 establishment unit 14 accesses the channel selection control information server from the acquired location information of the channel selection control information server, and obtains the channel selection control information of the video content received from the accessed channel selection control information server. get.

<Fifth method: MMTP packets are restored from the received TLV and transmitted, and the portal server of the broadcaster can be accessed from the broadcaster-specific application to access the TLV-SI information>
FIG. 7 is a schematic diagram of a configuration for distributing video content via an Internet line by the fifth method. Hereinafter, description will be made with reference to 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 puts the restored MMTP packet on the IP packet. And send it to the Internet line (CDN).
Each broadcaster (broadcasters A, B, C in the figure) provides its own portal server. Each broadcaster of broadcasters A, B, and C receives its own station distribution information regarding the distribution of broadcast programs distributed by each broadcaster via the Internet to receiver A, receiver B, and receivers by this portal server. It can be provided for each receiver of the machine C. The own station distribution information of the broadcasters A, B, and C is described as own station distribution information A, own station distribution information B, and own station distribution information C, respectively. An application unique to each broadcaster (described as "each station app" in the figure) is installed in advance on each receiver, and for example, when receiver A activates an application specific to broadcaster A. , The launched application accesses, for example, the portal server of the broadcaster A by using the location information (URI) embedded in the application. Then, the launched application acquires, for example, the broadcaster A's own station distribution information from the accessed portal server. Here, the channel selection control information is included in the own station distribution information. As a result, 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: MMTP packets can be restored and transmitted from the received TLV, and TLV-SI information can be accessed by accessing the portal server unified by each broadcaster from an application common to multiple broadcasters. ＞
FIG. 8 is a schematic diagram of a configuration for distributing video content via an Internet line by the sixth method. Hereinafter, description will be made with reference to 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 puts the restored MMTP packet on the IP packet. And send it to the Internet line (CDN).
Each broadcaster (broadcasters A, B, C in the figure) has its own portal server. Each portal server of each broadcasting company is configured to provide own station distribution information for distributing a broadcasting program of each broadcasting company via the Internet. In addition, a common portal server will be provided for each broadcasting company that unifies each broadcasting company. The portal server that unifies each broadcaster acquires its own station distribution information from the portal server of each broadcaster at a predetermined timing. Then, the portal server that unifies the broadcasters collectively publishes the own station distribution information collected from the portal server of each broadcaster. A portal server that unifies broadcasters is also called a "broadcaster unified portal server". On the other hand, an application corresponding to the above-mentioned unified portal server for broadcasters (described as "common app" in the figure) is installed in advance on the receiver. When each receiver activates this common application, the activated application accesses a portal server that unifies broadcasters by using the location information (URI) embedded in its own application. Then, the receiver acquires the distribution information of the broadcaster selected from each broadcaster from the broadcaster unified portal server by the activated application. The acquired distribution information includes channel selection control information. As a result, the receiver can receive the video content from the broadcaster unified portal server via the Internet line by using the channel selection control information acquired by the application. Then, the receiver can present the received video content to the user.
In this sixth method, the receiver can access the TLV-SI information by using a common application of each broadcasting company instead of an application unique to the broadcasting company. In that respect, the sixth method is more convenient than the fifth method.

<7th method: MMTP packets are restored from the received TLV and transmitted, and the IPTV common portal server is accessed from the IPTV common application so that the TLV-SI information can be accessed via the channel selection control information server>
FIG. 9 is a schematic diagram of a configuration for distributing video content via an Internet line by the seventh method. Hereinafter, description will be made with reference to 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 puts the restored MMTP packet on the IP packet. And send it to the Internet line (CDN).
An IPTV common portal server will be provided as a common server for a plurality of IPTV operators. Each IPTV operator stores the channel selection control information in advance in a storage unit (not shown) in the channel selection control information server. The above-mentioned 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-mentioned IPTV common portal server (described as "IPTV EPG app" in the figure; an application for acquiring IPTV EPG information) is installed in the receiver in advance. When the receiver activates this app, the app uses the location information (URI) embedded in it to access the IPTV common portal server. Then, the application acquires channel selection control information of a desired service from the IPTV common portal server. The receiver can receive the video content from the IPTV common portal server via the Internet line by using the channel selection control information acquired by the application. Then, 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 establishment unit 14 accesses the external portal server based on the location information of the external portal server stored in advance, and acquires the channel selection control information from the accessed portal server. What is the portal server referred to here? , A portal server for each broadcaster (fifth method), a unified portal server for broadcasters (sixth method), and an IPTV common portal server (seventh method).

Regardless of which method from the first method to the seventh method described above is used, a rebroadcast service by IP transmission can be provided without degrading the quality of broadcasting transmitted by MMT (for example, 8K super high-definition broadcasting). It will be possible to realize. In addition, regardless of which Internet service provider the viewer (user of the receiver) has a contract with, it is possible to realize a receiver that can receive the content by both the broadcast signal and the communication.

FIG. 10 is a schematic diagram showing a data structure of own station distribution information. FIG. 10 shows a data structure using a data representation language having a block structure. Then, the size (number of bits) of each data and the notation of each data are shown for each data item included in the data structure of the own station distribution information. Further, in FIG. 10, for convenience, a line number is attached to the left side. Regarding the above data notation, "uimsbf" represents "unsigned integer, most significant bit first" (unsigned integer, most significant bit first). In addition, "bslbf" represents "bit string, left bit first" (bit string, left bit first).
The own station distribution information is data used in the fifth method (FIG. 7) and the sixth method (FIG. 8) already described. The own station distribution information is information related to the distribution of the content provided by the broadcasting company, and holds the information when the video content of the own station is distributed (retransmitted) on the Internet line over a plurality of CDNs. In addition, the own station distribution information includes TLV-SI information.
Hereinafter, the own station distribution information will be described with reference to this drawing.

The first line is a declaration indicating the start of the definition of own station distribution information. The left curly brace on the first line corresponds to the right curly brace on the 37th line. That is, this period is one block. "Broadcaster_transmission_info" is an identifier indicating that the information is distributed by the broadcaster's own station.
The num_of_CDN (number of CDNs) on the second line indicates the number of CDNs possessed by the own station distribution information.
The third line is a for statement indicating the start of the loop for each CDN. The left curly brace on the third line corresponds to the right curly brace on the 36th line. That is, this period is a block corresponding to one CDN. The 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 on the 4th line corresponds to the right curly brace on the 7th line. That is, the 7th line is the end of this for statement.
The sixth line is cdn_name_byte (CDN name byte), which corresponds to each byte included in the CDN name. The byte string repeated by the for statement on the fifth line indicates the name of the CDN.
The seventh line indicates the end of the for statement 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 on 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 left curly brace on the 9th line corresponds to the right curly brace on the 35th line. That is, the data structure described during this period corresponds to the service information identified by the service identification (service_id).
The tenth line is service_id (service identification) which 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 to be 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 the area reserved for future use.
The thirteenth line is service_loop_length (service loop length). This service_loop_length indicates the byte length from immediately after this field to immediately before the next service identification field. Since the data length is variable depending on the if-else-statements from the 14th line to the 25th line, this service_loop_length area is provided.

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 left curly brace on the 14th line to the right curly brace on the 19th line is valid. That is, the definitions from the 15th line to the 18th line are valid when the value of ip_version is "0" (when it is IPv4).
The fifteenth line is src_address_32 (source IPv4 address), and describes the source IP address of the IPv4 packet constituting the service.
The 16th line is src_address_mask_32 (source IPv4 address mask), and specifies the number of valid bits from the beginning (MSB) for the IP address specified for the source IPv4 address. This src_address_mask_32 (source IPv4 address mask) does not take a value greater than 32.
The 17th line is dst_address_32 (destination IPv4 address), and describes the destination IP address of the IPv4 packet constituting the service.
The 18th line is dst_address_mask_32 (destination IPv4 address mask), and specifies the number of valid bits from the beginning (MSB) for the IP address specified for the destination IPv4 address. This dst_address_mask_32 (destination IPv4 address mask) does not take a value greater than 32. The multicast groups that make up the service are multicast groups that match 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 beginning part of the else clause of the if statement on the 19th line. This 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 valid when the value of ip_version is "1" (when it is IPv6).
The 21st line is src_address_128 (source IPv6 address), and describes the source IP address of the IPv6 packet constituting the service.
The 22nd line is src_address_mask_128 (source IPv6 address mask), and specifies the number of valid bits from the beginning (MSB) for the IP address specified for 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), and describes the destination IP address of the IPv6 packet constituting the service.
The 24th line is dst_address_mask_128 (destination IPv6 address mask), and specifies the number of valid bits from the beginning (MSB) for the IP address specified for the destination IPv6 address. This dst_address_mask_128 (destination IPv6 address mask) does not take a value larger than 128. The multicast groups that make up the service are multicast groups that match 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 is port_No. (Port number), which indicates 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 between IGMP (Internet Group Management Protocol) in IPv4 and MLD (Multicast Listener Discovery) in IPv6.
Line 28 shows the area reserved for future use.
The 29th line is num_of_FEC (number of FECs) and indicates the number of FECs (Forward Error Correction) methods to be applied.
The 30th line is a for statement for the loop for each FEC method. The left curly brace on the 30th line corresponds to the right curly brace on the 33rd line.
The 31st line is FEC_code_point (FEC method code point). This data shows the FEC code points specified in ISO / IEC 23008-10. The 32nd line is FEC_param (FEC method parameter). This data shows the parameters corresponding to each FEC method. For example, Code point = 6 is specified, and (L parameter, D parameter) is specified as, for example, (10, 10). Code points will be described further later.
The 33rd line is the end of the block from the 30th line described above.
The 34th line is remote_control_key_id (remote control key) and shows the value of the remote control key.

The right curly brace on the 35th, 36th, and 37th lines corresponds to the left curly brace on the 9th, 3rd, and 1st lines, respectively.

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

FIG. 11 is a schematic diagram showing the correspondence between the code point value included in the own station distribution information and the FEC coding algorithm. As shown, the code point values correspond to the coding algorithm. Specifically, when the code point value is 1, the coding algorithm is "RS (Reed Solomon)". When the code point value is 2, the coding algorithm is "S_LDPC". When the code point value is 3, the coding algorithm is "RaptorQ". Also, when the code point value is 4, the coding algorithm is "RaptorQ LA". When the code point value is 5, the coding algorithm is "FireFort_LDGM". When the code point value is 6, the coding algorithm is "SMPTE 2022-1 (Pro-MPEG)".

FIG. 12 is a schematic diagram showing a data structure of an address map table (AMT).
In the present embodiment, the channel selection control information is stored in the private data byte (private_data_byte) defined between the 32nd line to the 34th line in the configuration of this AMT.
The specific configuration of the channel selection control information will be described below.

FIG. 13 is a schematic diagram showing a data structure of channel selection control information stored in the area of the private data byte of AMT. FIG. 13 shows a data structure using a data representation language having a block structure. Then, FIG. 13 shows a data size (number of bits) and a data notation for each data item included in the data structure. In FIG. 13, for convenience, a line number is attached to the left side.

Hereinafter, channel selection control information (AMT private data) will be described 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 on the first line corresponds to the right curly brace on the eleventh line. That is, this period is one block.
The second line is port_No. (Port number). This is the data corresponding to the 26th row of FIG.
The third line is IGMP / MLD_version (multicast group management protocol version). This is the data corresponding to the 27th line of FIG.
The fourth line shows the area reserved for future use. This corresponds to the 28th line of FIG.
The fifth line is num_of_FEC (number of FECs). This corresponds to the 29th line of FIG.
The 6th to 9th lines are loops for defining code points (FEC_code_point) and parameters (FEC_param ()) for each FEC. The 6th to 9th rows are data corresponding to the 30th to 33rd rows of FIG. 10.
The tenth line is remote_control_key_id (remote control key), which is the data corresponding to the 34th line in FIG.

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

First, in step S101, the channel selection information establishment unit 14 determines whether or not the broadcast is being received. Specifically, the channel selection information establishment unit 14 makes a determination in this step based on the signal indicating the operation status of the broadcast demodulation unit 11 and the signal indicating the operation 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), in step S102, the channel selection information establishment unit 14 acquires the TLV-SI from the broadcast demodulation unit 11. Then, the channel selection information establishment unit 14 acquires a list of sets in which the service and the physical frequency are associated with each other from the TLV-NIT in the TLV-SI. Further, the channel selection information establishment unit 14 acquires a set in which the service and the multicast address are associated with each other from the AMT in the TLV-SI. When the broadcast is being received, the channel selection information establishment unit 14 is in a state of establishing the channel selection control information. Then, after the processing of this step, the process proceeds to the state of step S113.

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

Next, in step S104, the network establishment unit 18 attempts 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, if 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 next step is 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 or not the network configuration information server can be accessed. As a result, if the network configuration information server can be accessed (step S105: YES), the next step is step S106. If the network configuration information server cannot be accessed (step S105: NO), the next step is 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 establishment unit 14 receives the location information of the CDN configuration information server from the network configuration information server ( URI) is acquired. 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 contracted by the user of the receiver 1 from the network configuration information server.

When the process proceeds to step S107 from step S104 or step S106, in step S107, the channel selection information establishment 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 establishment 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 establishment 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 establishment unit 14 acquires the location information (URI) of the channel selection control information server from the PF configuration information server. That is, in the processes from step S107 to step S108, the channel selection information establishment unit 14 traces the location information of the channel selection control information server based on the CDN configuration information server of the CDN contracted by the user of the receiver 1. Therefore, the location information acquired by the channel selection information establishment 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 establishment unit 14 accesses the channel selection control information server using the location information of the channel selection control information server acquired in step S108. The channel selection control information server accessed by the channel selection information establishment unit 14 at this time is the channel selection control information server in the CDN contracted by the user of the receiver 1.

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

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

Then, in step S112, the application (channel selection information establishment unit 14) executed by the application execution unit 17 accesses the server designated in the application and acquires its own station distribution information or channel selection control information from the server. To do. Alternatively, the application acquires the own station distribution information or the channel selection control information by accessing the own station distribution information server or the channel selection control information server by tracing the information from the designated server.
In each of the fourth to seventh methods described above, 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 then sequentially traces from there to access the channel selection control information server and acquire channel selection control information.
Further, 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.
Further, in the sixth method, the application first accesses the broadcaster unified portal server. Then, the application acquires the location information of the portal server of the target broadcaster from the unified portal server of the broadcaster, and accesses the portal server of the specific broadcaster. Further, the application acquires the broadcaster's own station distribution information from the broadcaster's portal server.
As a modification of the sixth method, the broadcaster unified portal server may hold the own station distribution information of each broadcaster. In this case, the application accesses the broadcaster unified portal server and acquires the own station distribution information of the target broadcaster from the broadcaster unified portal server.
Further, 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 a 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 channel selection control information of each service provider may be stored 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 establishment unit 14) is in a state in which channel selection control information has been established by the process of step S112 described above. That is, after the processing of this step, the process proceeds to the state of step S113.

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

The receiver 1 does not necessarily have to include all the functions of the operation procedure shown in FIG. 14, and may be configured to include only a part of the functions.
The receiver 1 performs processing according to either the reception of the video content by the broadcast signal or the reception of the video content by the IP communication, and establishes the channel selection control information. Further, when receiving video content by IP communication, necessary processing is performed according to which of the first method to the seventh method described above is used, and channel selection control information is established. Specifically, it is as follows.

When receiving the video content by the broadcast signal, the receiver 1 establishes the channel selection control information by performing the processes of steps S101 → S102 → S113 in the flowchart.
In the case of receiving video content by IP communication and using the above-mentioned third method, the receiver 1 has 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 processing.
Further, 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.
Further, when any of the above-mentioned fifth to seventh methods is used, the receiver 1 controls channel selection by performing the processes 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 an internet line, it is not necessary to realize all of the above-mentioned first to seventh methods, and even if only some of these methods are realized. Good. As for the functional configuration of the receiver and the system on the network side, it is only necessary to realize only the required functions according to the method to be realized.

In addition, a computer may realize a part or all of the functions of the receiver in the above-described embodiment, the retransmission system (retransmission device) on the IPTV operator side, and various other server devices. In that case, the program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed. The term "computer system" as used herein includes hardware such as an OS and 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, or a USB memory, or a storage device such as a hard disk built in a computer system. Say that. Further, a "computer-readable recording medium" is a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line, and dynamically holds the program for a short period of time. It may also include a program that holds a program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or a client in that case. Further, the above-mentioned program may be for realizing a part of the above-mentioned functions, and may be further realized by combining the above-mentioned functions with a program already recorded in the computer system.

In addition, this embodiment may be carried out by the following modification.
In the above explanation, it is decided that the receiver holds fixed information (for example, location information of the server device to be accessed). In addition, the application installed on the receiver holds fixed information (similarly, the location information of the server device, etc.). As a modification, these fixed information may be updated as appropriate. As a result, it is possible to realize an operation that can flexibly respond to changes in the system configuration.
Further, the retransmission system described in the embodiment may be a retransmission device realized as a single device. Further, the retransmission system may be a retransmission device realized by combining a plurality of components.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and the design and the like within a range not deviating from the gist of the present invention are also included.

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.

1 Receiver 11 Broadcast demodulation unit 12 Communication unit 14 Channel selection information establishment unit 17 Application execution unit 18 Network establishment unit 20 Back-end processing unit 21 Desk rumble unit 22 Decoding unit 23 MMT / IP processing unit 24 Control information processing unit 30 Display processing Department

Claims (10)

With the communication unit that communicates with the outside via the network,
A channel selection information establishment unit that acquires channel selection control information included in the TLV-SI information for the communication unit to receive the content transmitted by the MMTP via the communication unit.
A back-end processing unit that performs a process of extracting MMT assets included in the content from the content received by the communication unit, and a back-end processing unit.
A receiver characterized by being equipped with. With the communication unit that communicates with the outside via the network,
A channel selection information establishment unit that acquires channel selection control information for the communication unit to receive content transmitted by MMTP via the communication unit, and
A back-end processing unit that performs a process of extracting MMT assets included in the content from the content received by the communication unit, and a back-end processing unit.
Equipped with
The tuning information establishing unit extracts a TLV packet by the communication unit is stored in the received packet, it get the tuning control information from the control information of the TLV-SI included in the TLV packet,
Receiving machine. With the communication unit that communicates with the outside via the network,
A channel selection information establishment unit that acquires channel selection control information for the communication unit to receive content transmitted by MMTP via the communication unit, and
A back-end processing unit that performs a process of extracting MMT assets included in the content from the content received by the communication unit, and a back-end processing unit.
Equipped with
The channel selection information establishment unit extracts TLV-SI control information from packets that belong to a stream different from the packet that stores the content among the packets received by the communication unit, and the TLV-SI control information. you get the tuning control information from,
Receiving machine. The channel selection information establishment unit accesses the network configuration information server based on the location information of the network configuration information server stored in advance, acquires the location information of the CDN configuration information server from the network configuration information server, and obtains the location information of the CDN configuration information server. The CDN configuration information server is accessed based on the location information of the configuration information server, the location information of the PF configuration information server is acquired from the CDN configuration information server, and the PF configuration information is obtained based on the location information of the PF configuration information server. Access the server, acquire the location information of the channel selection control information server from the PF configuration information server, access the channel selection control information server based on the location information of the channel selection control information server, and perform the channel selection control information. Acquire the channel selection control information from the server,
The receiver according to claim 1. The channel selection information establishment unit accesses the CDN configuration information server based on the location information of the CDN configuration information server stored in advance, acquires the location information of the PF configuration information server from the CDN configuration information server, and obtains the location information of the PF configuration information server. 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 selection is performed based on the location information of the channel selection control information server. Access the station control information server and acquire the channel selection control information from the channel selection control information server.
The receiver according to claim 1. The channel selection information establishment unit accesses the portal server based on the location information of the 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 equipped with a communication unit that communicates with the outside via a network
The receiver according to any one of claims 1 to 6.
A program to function as. A retransmission device that rebroadcasts the content contained in the received broadcast signal via the IP network.
The TLV packet included in the broadcast signal is extracted, the address information in the TLV-SI control information included in the TLV packet is rewritten for transmission in the IP network, and the TLV including the rewritten control information of the TLV-SI is included. A retransmission device that stores a packet in an IP packet and sends it out via the IP network. A retransmission device that rebroadcasts the content contained in the received broadcast signal via the 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 control information of the TLV-SI included in the TLV packet. A retransmission device that rewrites information for transmission in the IP network, stores the rewritten control information of the TLV-SI in an IP packet, and transmits the rewritten control information in the second stream of the IP network. A retransmission device that retransmits the content contained in the received broadcast signal via the IP network.
The MMTP packet is restored based on the TLV packet included in the received broadcast signal, the MMTP packet is placed on the IP packet and sent to the IP network, and the TLV- includes location information for the receiver to receive the content. A retransmission device capable of transmitting channel selection control information included in SI information from a server accessible from the receiver side.

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