JP2016208161A - Transmitter, transmission method, receiver and reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the coexistence of a plurality of transport protocols.SOLUTION: A receiver receives transmission information indicative of whether a service stream using a specific transport protocol among the plurality of transport protocols specified by a predetermined standard, and included in first control information disposed in a physical layer frame conforming to the predetermined standard, to control the operation of each part which processes the service stream using the specific transport protocol on the basis of second control information conforming to the specific transport protocol acquired based on the transmission information. The present invention is applicable to a television receiver conforming to an IP transmission method.SELECTED DRAWING: Figure 23

Description

  The present technology relates to a transmission device, a transmission method, a reception device, and a reception method, and more particularly, to a transmission device, a transmission method, a reception device, and a reception method that allow a plurality of transport protocols to coexist. .

  For example, in Advanced Television Systems Committee (ATSC) 3.0, one of the next generation terrestrial broadcasting standards, IP / UDP packets, that is, UDP (User Datagram Protocol) packets are used for data transmission instead of TS (Transport Stream) packets. It has been decided to use IP (Internet Protocol) packets that contain them. In addition, it is expected that IP packets will be used in the future in digital broadcasting standards other than ATSC 3.0 (see, for example, Non-Patent Document 1).

"ARIB STD-B60 1.1 version", Japan Radio Industry Association

  By the way, in a digital broadcasting standard such as ATSC 3.0, since a plurality of transport protocols may coexist, a technique for coexisting a plurality of transport protocols is required.

  The present technology has been made in view of such a situation, and enables a plurality of transport protocols to coexist.

  Whether the transmission device according to the first aspect of the present technology transmits a service stream using a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard A transmission apparatus comprising: a generation unit that generates transmission information indicating whether or not; and a transmission unit that transmits the transmission information included in first control information arranged in a frame of a physical layer corresponding to the predetermined standard. is there.

  The transmission device according to the first aspect of the present technology may be an independent device, or may be an internal block constituting one device. A transmission method according to the first aspect of the present technology is a transmission method corresponding to the transmission device according to the first aspect of the present technology described above.

  In the transmission device and the transmission method according to the first aspect of the present technology, a service that uses a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard. Transmission information indicating whether or not a stream is transmitted is generated, and the transmission information is transmitted by being included in first control information arranged in a physical layer frame corresponding to the predetermined standard.

  Whether the receiving apparatus according to the second aspect of the present technology transmits a service stream using a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard Transmission information indicating whether the transmission information is received according to the transmission information, and a reception unit that receives the transmission information included in the first control information arranged in the frame of the physical layer corresponding to the predetermined standard And a control unit that controls the operation of each unit that processes a stream of service using the specific transport protocol based on second control information corresponding to the specific transport protocol. It is.

  The receiving device according to the second aspect of the present technology may be an independent device, or may be an internal block constituting one device. The reception method according to the second aspect of the present technology is a reception method corresponding to the reception device according to the second aspect of the present technology described above.

  In the receiving device and the receiving method according to the second aspect of the present technology, a service that uses a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard. Transmission information indicating whether or not a stream is transmitted, the transmission information included in the first control information arranged in a frame of a physical layer corresponding to the predetermined standard is received, and according to the transmission information Based on the second control information corresponding to the specific transport protocol acquired in this manner, the operation of each unit that processes the stream of the service using the specific transport protocol is controlled.

  According to the first aspect and the second aspect of the present technology, a plurality of transport protocols can coexist.

  Note that the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

It is a figure showing the composition of the 1 embodiment of the transmission system to which this art is applied. It is a figure explaining the system for respond | corresponding to several transport protocols. It is a figure which shows the example of the syntax of this technical descriptor. It is a figure which shows the system pipe model of the operation example 1-1. It is a figure which shows the example of a description of this technical descriptor of the operation example 1-1. It is a figure which shows the system pipe model of the operation example 1-2. It is a figure which shows the example of a description of this technical descriptor of the operation example 1-2. It is a figure which shows the system pipe model of the operation example 2-1. It is a figure which shows the example of a description of this technical descriptor of the operation example 2-1. It is a figure which shows the system pipe model of the operation example 2-2. It is a figure which shows the example of a description of this technical descriptor of the operation example 2-2. It is a figure explaining the concept of the layer structure corresponding to ATSC3.0. It is a figure which shows the example of the syntax of L1-post signaling. It is a figure which shows the structure of a bootstrap. It is a figure which shows the example of the syntax of the bootstrap symbol. It is a figure which shows the example of the syntax of the bootstrap symbol. It is a figure which shows the example of the syntax of the bootstrap symbol. It is a figure which shows the structure of a bootstrap. It is a figure which shows the example of the syntax of the bootstrap symbol. It is a figure which shows the example of the syntax of the bootstrap symbol. 6 is a diagram illustrating an example of syntax of a bootstrap symbol 67. FIG. It is a figure which shows the structural example of a transmitter. It is a figure which shows the structural example of a receiver. It is a flowchart explaining a transmission process. It is a flowchart explaining a reception process. It is a figure which shows the structural example of a computer.

  Hereinafter, embodiments of the present technology will be described with reference to the drawings. The description will be made in the following order.

1. 1. System configuration 2. Outline of this technology Operation example (1) Operation example 1-1: When ROUTE and MMT signaling information is transmitted by different PLPs (2) Operation example 1-2: When ROUTE and MMT signaling information is transmitted by a common PLP (3) Operation Example 2-1: When ROUTE and MMT Signaling Information on IP / UDP are Transmitted by Different PLPs (4) Operation Example 2-2: ROUTE and MMT Signaling Information on IP / UDP are 3. When transmitted by common PLP 4. Signaling transmission method Configuration of each device 6. 6. Process flow executed by each device Modification 8 Computer configuration

<1. System configuration>

  FIG. 1 is a diagram illustrating a configuration of an embodiment of a transmission system to which the present technology is applied. A system refers to a logical collection of a plurality of devices.

  In FIG. 1, the transmission system 1 includes a transmission device 10 and a reception device 20. In this transmission system 1, data transmission conforming to a digital broadcasting standard such as ATSC3.0 is performed.

  The transmission device 10 transmits content such as a television program. That is, the transmission apparatus 10 transmits (transmits) a stream of video, audio, captions, and the like (components) constituting the content as a digital broadcast signal via the transmission path 30.

  The receiving device 20 receives and outputs content such as a television program transmitted from the transmitting device 10 via the transmission path 30. That is, the receiving device 20 receives a digital broadcast signal transmitted from the transmitting device 10, acquires and processes a stream of video, audio, subtitles, etc. (components) constituting the content, and processes the video and audio of the content. Is output.

<2. Overview of this technology>

  By the way, in the standard of digital broadcasting, as shown in FIG. 2, transport protocols such as ROUTE (Real-Time Object Delivery over Unidirectional Transport), MMT (MPEG Media Transport), or MPEG2-TS (Transport Stream) coexist. May be operated as

  Here, ROUTE is an extended protocol of FLUTE (File Delivery over Unidirectional Transport), which is a protocol suitable for multicast transfer of binary files in one direction. MMT is a transport method used on IP (Internet Protocol), and data such as video and audio can be referenced by setting an IP address and URL (Uniform Resource Locator) using control information. . MPEG2-TS is a transport method for transmitting and receiving data in the MPEG2 format, and data such as video and audio can be collectively handled as one stream.

  Since these transport protocols are composed of unique data flows and service signaling, the broadcast station (the transmitting device 10) provides a plurality of transport protocols such as ROUTE and MMT when providing a service. A specific transport protocol is selected and used from the protocols. Therefore, the transmitting apparatus 10 transmits information indicating whether a service stream using a specific transport protocol among a plurality of transport protocols is transmitted to the receiving apparatus 20 (hereinafter, also referred to as transmission information). Need to be transmitted).

  For example, in ATSC 3.0, ROUTE and MMT coexist as transport protocols. In this case, whether the service stream is a stream of a service using ROUTE (hereinafter also referred to as a ROUTE service) or a service using an MMT (hereinafter also referred to as an MMT service), It is necessary to notify by transmission information.

  As described above, when a plurality of transport protocols coexist and operate, it is possible to appropriately notify which transport protocol the service stream uses, and to Techniques for coexisting port protocols are required.

  Therefore, in this technology, a descriptor including transmission information for responding to such a request (hereinafter also referred to as this technology descriptor) is defined and arranged in a physical layer frame, so that a plurality of transport We propose a method that allows protocols to coexist. For example, in ATSC 3.0, since ROUTE and MMT coexist as transport protocols, a case where ROUTE and MMT coexist will be described below as an example.

  Note that the signaling information used in the ROUTE service is different from the signaling information used in the MMT service. Specifically, in the ROUTE service, LLS (Link Layer Signaling) signaling information and SLS (Service Layer Signaling) signaling information are defined, and information described in the LLS signaling information acquired in advance is used. SLS signaling information for each ROUTE service is acquired.

  Here, the LLS signaling information includes metadata such as FIT (Fast Information Table), EAD (Emergency Alerting Description), and RRD (Region Rating Description). The FIT includes information indicating the stream and service configuration in the broadcast network, such as information necessary for selecting the ROUTE service. EAD contains information about emergency alerts. The RRD contains information about the rating.

  The SLS signaling information includes, for example, metadata such as USD (User Service Description), MPD (Media Presentation Description), and LSID (LCT Session Instance Description). The USD includes information such as another metadata acquisition destination. MPD is control information for managing the playback of component streams. LSID is ROUTE protocol control information.

  Also in the MMT service, signaling information related to the MMT service (hereinafter referred to as MMT signaling information) is defined.

  In addition, as shown in FIG. 2, the applicant of the present invention includes a generic packet header that transmits an IP packet, an extension header of the generic packet, a header that is added to L2 signaling information arranged in the payload of the generic packet, There has already been proposed a method in which transport protocol selection information is arranged and transmitted in L2 signaling information arranged in a payload or an extension header of a BB (BaseBand) frame.

(Syntax of this technical descriptor)
FIG. 3 is a diagram illustrating an example of the syntax of the technical descriptor.

  6-bit NUM_PLP indicates the number of PLPs (Physical Layer Pipes) that can be arranged in one frequency band. For example, ATSC 3.0 stipulates that up to 64 PLPs can be placed in one frequency band (for example, a 6 MHz frequency band corresponding to one channel), so NUM_PLP = "64", etc. Can be set. Next to NUM_PLP, a 2-bit reserved area (reserved) is arranged. Next to the reserved area, the PLP loop is repeated according to the number of PLPs indicated by NUM_PLP.

  In this PLP loop, ROUTE_SIGNALING_ENTRY, MMT_SIGNALING_ENTRY, and PLP_GROUP_ID are arranged as transmission information.

  1-bit ROUTE_SIGNALING_ENTRY is a flag indicating whether or not LLS signaling information used in the ROUTE service is transmitted in the target PLP. For example, when ROUTE_SIGNALING_ENTRY = "1" is set, it indicates that the target PLP includes LLS signaling information.

  1-bit MMT_SIGNALING_ENTRY is a flag indicating whether or not MMT signaling information used in the MMT service is transmitted in the target PLP. For example, when MMT_SIGNALING_ENTRY = "1" is set, it indicates that the target PLP includes MMT signaling information.

  6-bit PLP_GROUP_ID is an ID for identifying a group to which the target PLP belongs. Here, PLP_GROUP_ID is represented by a bitmap structure in which a group is assigned to each bit in a 6-bit bit string. Therefore, among the 6 bits, each bit from the least significant bit (LSB) to the most significant bit (MSB) can be assigned to the PLP group 1 to the PLP group 6 in order.

  Note that FIG. 3 illustrates the case where ROUTE and MMT coexist as transport protocols. However, when other transport protocols such as MPEG2-TS are further used, other transport protocols are used. A 1-bit flag indicating whether or not signaling information used in the transport protocol service is transmitted is further added. Also, although PLP_GROUP_ID has been described as having 6 bits, the number of bits assigned to PLP_GROUP_ID is arbitrary. For example, it is possible to set 14 groups by increasing the number of bits allocated to PLP_GROUP_ID by 1 byte and allocating 14 bits.

<3. Operation example>

  Next, a specific operation example using this technical descriptor will be described. Here, as the first scheme, LLS signaling information and MMT signaling information are transmitted as L2 signaling information, and as the second scheme, LLS signaling information and MMT signaling information are IP packets including UPD packets ( Hereinafter, description will be given of a case where transmission is also performed using IP / UDP packets.

(1) Operation example 1-1

(System pipe model)
FIG. 4 is a diagram illustrating a system pipe model of operation example 1-1 corresponding to an operation mode when the signaling information of the ROUTE service and the MMT service is transmitted by different PLPs when the first method is adopted. .

  In FIG. 4, in a broadcast wave (RF Channel) having a predetermined frequency band (for example, 6 MHz), PLPID PLP (PLP0) of “0”, PLPID PLP (PLP1) of “1”, “ A PLPID PLP (PLP2) of 2 "is transmitted. Of the three PLPs, PLP0 transmits an NTP (Network Time Protocol) and a ROUTE service stream over IP / UDP.

  In PLP0, the ROUTE service stream includes SLS signaling information and video, audio, and subtitle streams. The SLS signaling information is signaling information for each ROUTE service such as USD and MPD. Further, content A (for example, a television program) provided by the ROUTE service is composed of video, audio, and subtitle components. Note that NTP is time information.

  In FIG. 4, LLS signaling information such as FIT is transmitted in PLP1. In PLP1, a stream of the ROUTE service is transmitted over IP / UDP. The ROUTE service stream includes a robust audio stream having high robustness.

  Here, although PLP0 and PLP1 transmit different ROUTE service streams, they belong to the same PLP group 1. That is, in this PLP group 1, since the stream of LLS signaling information is transmitted by PLP1, the receiving apparatus 20 can acquire the FIT therefrom and hold it as channel selection information.

  When the ROUTE service is selected, the receiving device 20 acquires the SLS signaling information transmitted by PLP0 based on the channel selection information (FIT). Then, the receiving device 20 can reproduce the content A of PLP0 by acquiring video, audio, and subtitle streams based on the SLS signaling information of PLP0. Here, since the robust audio stream is transmitted as the PLP1 ROUTE service stream, the receiving apparatus 20 may reproduce the PLP1 robust audio instead of the normal PLP0 audio.

  In this way, PLP0 and PLP1 belong to the same PLP group 1, but SLS signaling information and component streams are transmitted by PLP0, while LLS signaling information and robust audio streams are transmitted by PLP1. Is being transmitted. That is, the PLP group 1 groups signaling information and component streams related to a specific ROUTE service.

  In FIG. 4, a stream of MMT signaling information is transmitted in PLP2. In PLP2, NTP and MMT service streams are transmitted over IP / UDP. In PLP2, the MMT service stream includes video, audio, and subtitle streams. Content B (for example, a television program) provided by the MMT service is composed of video, audio, and subtitle components.

  Here, PLP2 does not belong to the PLP group and is configured as a single PLP. That is, in PLP2 that does not belong to this PLP group, a stream of MMT signaling information is transmitted. Therefore, when the MMT service is selected, the receiving device 20 can perform video, audio, and audio based on the MMT signaling information of PLP2. By acquiring the subtitle stream, the content B of PLP2 can be reproduced.

  Thus, since PLP2 does not belong to a PLP group and is configured as a single PLP, MMT signaling information and component streams are transmitted by PLP2. That is, all signaling information and component streams related to a specific MMT service are transmitted by PLP2.

(Description example of this technical descriptor)
Regarding the system pipe model of the operation example 1-1 configured as described above (FIG. 4), whether or not LLS signaling information and MMT signaling information are transmitted for each PLP identified by the PLPID according to the present technology descriptor, The affiliation of the PLP group is as shown in FIG.

  In FIG. 5, in the PLP (PLP0) of PLPID “0”, both LLS signaling information and MMT signaling information (stream) are not transmitted. ing.

  On the other hand, since only the LLS signaling information is transmitted in the PLP (PLP1) of the PLPID that is “1”, “1” is set as ROUTE_SIGNALING_ENTRY and “0” is set as MMT_SIGNALING_ENTRY. In addition, since only the MMT signaling information is transmitted in the PLP (PLP2) of the PLPID that is “2”, “0” is set as ROUTE_SIGNALING_ENTRY and “1” is set as MMT_SIGNALING_ENTRY.

  In addition, since PLP with PLPID “0” (PLP0) and PLPID with PLPID “1” (PLP1) belong to the same PLP group 1, both belong to PLP group 1 in PLP_GROUP_ID. "00 0001" is set to indicate that On the other hand, since the PLP (PLP2) of the PLPID that is “2” does not belong to the PLP group and is a single PLP, “00 0000” is set in the PLP_GROUP_ID.

  In the system pipe model of operation example 1-1 in FIG. 4, since three PLPs (PLP0 to PLP2) are transmitted, “3” is set as NUM_PLP. Therefore, in the case of the operation example 1-1, it is not necessary to describe the information about the PLP having the PLP_ID “3” to “63” among the 64 PLPs that can be arranged in the ATSC 3.0.

  As described above, in the operation example 1-1, the reception device 20 is configured to transmit the technology descriptor of FIG. 5 in the physical layer frame (the L1 signaling information), so that the reception device 20 performs the technology of FIG. When the descriptor is acquired, for example, a stream related to the ROUTE service is transmitted by PLP0 and PLP1 belonging to PLP group 1, and a stream related to the MMT service is transmitted by PLP2 configured as a single PLP. Can be recognized. As a result, the receiving device 20 can perform processing according to, for example, the ROUTE service or the MMT service, so that a plurality of transport protocols can coexist.

  Further, according to the present technology descriptor of FIG. 5, the receiving device 20 transmits a stream of LLS signaling information used in the ROUTE service among PLP0 and PLP1 belonging to PLP group 1 and is transmitted by PLP2. Thus, it can be recognized that a stream of MMT signaling information used in the MMT service is transmitted.

  That is, in digital broadcasting standards such as ATSC 3.0, information (PLP_GROUP_ID) for grouping arbitrary PLPs when a plurality of PLPs can be arranged in one frequency band is specified. is there. As described in Operation Example 1-1, when a plurality of PLPs are grouped, in each PLP, signaling information transmitted in a layer higher than the physical layer (for example, LLS signaling information and MMT signaling information). Etc.) and PLP not transmitted.

  Here, the technical descriptor (ROUTE_SIGNALING_ENTRY, MMT_SIGNALING_ENTRY) indicating whether or not signaling information transmitted in a layer higher than the physical layer is transmitted is transmitted in the physical layer frame (L1 signaling information) ( 5), the receiving apparatus 20 analyzes the content of the technical descriptor, and thereby transmits signaling information (for example, LLS signaling information and MMT signaling information) in each PLP. Can recognize whether or not. In addition, the receiving device 20 analyzes the content of the technical descriptor so that a transport protocol (for example, ROUTE, MMT, etc.) used in the provided service is selected from a plurality of transport protocols. ) Can be recognized.

  Therefore, for example, it is possible to flexibly cope with various operation modes such as sharing a specific component by a plurality of services or grouping a plurality of PLPs. Further, since the receiving apparatus 20 can recognize the existence and type of signaling information transmitted in a layer higher than the physical layer at the time of obtaining the present technology descriptor in FIG. 5, the target signaling information can be quickly identified. Acquisition time can be shortened.

(2) Operation example 1-2

(System pipe model)
FIG. 6 is a diagram showing a system pipe model of operation example 1-2 corresponding to the operation mode when the signaling information of the ROUTE service and the MMT service is transmitted by a common PLP when the first method is adopted. is there.

  In FIG. 6, in a broadcast wave (RF Channel) having a predetermined frequency band (for example, 6 MHz), only PLP (PLP0) of PLPID which is “0” is transmitted. In PLP0, streams of NTP, ROUTE service, and MMT service are transmitted over IP / UDP together with streams of LLS signaling information and MMT signaling information.

  In PLP0, the ROUTE service stream includes SLS signaling information and video, audio, and subtitle streams. Content C (for example, a television program) provided by the ROUTE service is composed of the video, audio, and subtitle components.

  Here, PLP0 does not belong to the PLP group and is configured as a single PLP. That is, since the stream of LLS signaling information is transmitted by PLP0 that does not belong to this PLP group, the receiving apparatus 20 can acquire the FIT therefrom and hold it as channel selection information. Further, when the ROUTE service is selected, the receiving device 20 acquires the SLS signaling information transmitted by PLP0 based on the channel selection information (FIT). The receiving device 20 can reproduce the content C of PLP0 by acquiring video, audio, and subtitle streams based on the SLS signaling information of PLP0.

  Thus, since PLP0 does not belong to the PLP group and is configured as a single PLP, LLS signaling information and component streams are transmitted by PLP0. That is, all signaling information and component streams related to a specific ROUTE service are transmitted by PLP0.

  In PLP0, the MMT service stream includes video, audio, and subtitle streams. Content D (for example, a television program) provided by the MMT service is configured by the video, audio, and subtitle components.

  Here, PLP0 does not belong to the PLP group and is configured as a single PLP. That is, since the stream of MMT signaling information is transmitted by PLP0 not belonging to this PLP group, when the MMT service is selected, the receiving device 20 can perform video, audio, and audio based on the MMT signaling information of PLP0. By acquiring a subtitle stream, the content D of PLP0 can be reproduced.

  Thus, since PLP0 does not belong to the PLP group and is configured as a single PLP, MMT signaling information and component streams are transmitted by PLP0. That is, all signaling information and component streams related to a specific MMT service are transmitted by PLP0.

(Description example of this technical descriptor)
Regarding the system pipe model of the operation example 1-2 configured as described above (FIG. 6), whether or not LLS signaling information and MMT signaling information are transmitted for each PLP identified by the PLPID according to the present technology descriptor, The affiliation of the PLP group is as shown in FIG.

  In FIG. 7, since the LLP signaling information and the MMT signaling information (stream) are transmitted in the PLP (PLP0) of the PLPID which is “0”, both “1” is set in ROUTE_SIGNALING_ENTRY and MMT_SIGNALING_ENTRY. Yes. In addition, since the PLP (PLP0) of the PLPID that is “0” does not belong to the PLP group and is a single PLP, “00 0000” is set in the PLP_GROUP_ID.

  In the system pipe model of operation example 1-2 in FIG. 6, since only one PLP (PLP0) is transmitted, “1” is set as NUM_PLP. Therefore, in the case of the operation example 1-2, it is not necessary to describe information about PLPs whose PLP_IDs are “1” to “63” among 64 PLPs that can be arranged in ATSC 3.0.

  As described above, in the operation example 1-2, the reception device 20 is configured to transmit the technology descriptor of FIG. 7 in the physical layer frame (the L1 signaling information), so that the reception device 20 performs the technology of FIG. When the descriptor is acquired, for example, it can be recognized that a stream related to the ROUTE service and the MMT service is transmitted using a common PLP. As a result, the receiving device 20 can perform processing according to, for example, the ROUTE service or the MMT service, so that a plurality of transport protocols can coexist.

  7, the receiving apparatus 20 recognizes that both streams of LLS signaling information used in the ROUTE service and MMT signaling information used in the MMT service are transmitted in PLP0. be able to. Therefore, for example, the receiving device 20 can recognize the existence and type of signaling information transmitted in a layer higher than the physical layer at the time of acquiring the present technology descriptor in FIG. It can be acquired quickly and processing time can be shortened.

(3) Operation example 2-1

(System pipe model)
FIG. 8 is a diagram illustrating a system pipe model of operation example 2-1 corresponding to an operation mode when the signaling information of the ROUTE service and the MMT service is transmitted by different PLPs when the second method is adopted. .

  In FIG. 8, in a broadcast wave (RF Channel) having a predetermined frequency band (for example, 6 MHz), PLPID PLP (PLP0) of “0”, PLPID PLP (PLP1) of “1”, “ A PLPID PLP (PLP2) of 2 "is transmitted. Of the three PLPs, PLP0 transmits NTP and ROUTE service streams over IP / UDP.

  In PLP0, the ROUTE service stream includes SLS signaling information and video, audio, and subtitle streams. Content A (for example, a television program) provided by the ROUTE service is composed of video, audio, and subtitle components.

  In FIG. 8, PLP1 transmits LLS signaling information such as FIT in addition to a ROUTE service stream including robust audio over IP / UDP. That is, in the operation example 2-1 adopting the second method, the LLS signaling information is not as L2 signaling information but on the IP / UDP as compared with the operation example 1-1 adopting the first method. It is different in that it is transmitted (transmitted by IP / UDP packet). In this case, in the receiving device 20, the LLS signaling information stored in the IP / UDP packet is specified by a fixed IP address and port number.

  Receiving device 20 acquires FIT transmitted as LLS signaling information by PLP1 and holds it as channel selection information. In addition, when the ROUTE service is selected, the receiving device 20 acquires SLS signaling information transmitted in PLP0 based on the channel selection information (FIT), so that video, audio, and subtitle components are obtained. Can be played back. Here, the receiving device 20 may reproduce the robust audio transmitted by PLP1 instead of the normal audio transmitted by PLP0.

  In this way, PLP0 and PLP1 belong to the same PLP group 1, but SLS signaling information and component streams are transmitted by PLP0, while LLS signaling information and robust audio streams are transmitted by PLP1. Is being transmitted. That is, the PLP group 1 groups signaling information and component streams related to a specific ROUTE service.

  In FIG. 8, PLP2 transmits MMT signaling information in addition to NTP and MMT service streams on IP / UDP. That is, in the operation example 2-1 adopting the second method, the MMT signaling information is not transmitted as L2 signaling information but on the IP / UDP as compared with the operation example 1-1 adopting the first method. Is different (transmitted by IP / UDP packet). In this case, in the receiving device 20, the MMT signaling information stored in the IP / UDP packet is specified by a fixed IP address and port number.

  When the MMT service is selected, the receiving device 20 can reproduce the content B composed of video, audio, and subtitle components based on the MMT signaling information.

  Thus, since PLP2 does not belong to a PLP group and is configured as a single PLP, MMT signaling information and component streams are transmitted by PLP2. That is, all signaling information and component streams related to a specific MMT service are transmitted by PLP2.

(Description example of this technical descriptor)
With respect to the system pipe model (FIG. 8) of the operation example 2-1 configured as described above, whether or not LLS signaling information and MMT signaling information are transmitted for each PLP identified by the PLPID according to the present technology descriptor, The affiliation of the PLP group is as shown in FIG.

  In FIG. 9, since neither LLS signaling information nor MMT signaling information (stream) is transmitted in PLP0, “0” is set in both ROUTE_SIGNALING_ENTRY and MMT_SIGNALING_ENTRY.

  On the other hand, since only the LLS signaling information is transmitted in PLP1, “1” is set as ROUTE_SIGNALING_ENTRY and “0” is set as MMT_SIGNALING_ENTRY. Also, since only MMT signaling information is transmitted in PLP2, “0” is set as ROUTE_SIGNALING_ENTRY and “1” is set as MMT_SIGNALING_ENTRY.

  Further, since PLP0 and PLP1 belong to the same PLP group 1, "00 0001" indicating that both belong to the PLP group 1 is set in the PLP_GROUP_ID. On the other hand, since PLP2 does not belong to the PLP group and is a single PLP, “00 0000” is set in PLP_GROUP_ID.

  As described above, in the operation example 2-1, the reception apparatus 20 is configured to transmit the technology descriptor of FIG. 9 in the physical layer frame (L1 signaling information thereof), so that the reception device 20 performs the technology of FIG. When the descriptor is acquired, for example, a stream related to the ROUTE service is transmitted by PLP0 and PLP1 belonging to PLP group 1, and a stream related to the MMT service is transmitted by PLP2 configured as a single PLP. Can be recognized. As a result, the receiving device 20 can perform processing according to, for example, the ROUTE service or the MMT service, so that a plurality of transport protocols can coexist.

  Further, according to the present technology descriptor of FIG. 9, the receiving device 20 transmits a stream of LLS signaling information used in the ROUTE service among PLP0 and PLP1 belonging to PLP group 1 and is transmitted by PLP2. Thus, it can be recognized that a stream of MMT signaling information used in the MMT service is transmitted. Therefore, for example, the receiving apparatus 20 can recognize the existence and type of signaling information transmitted in a layer higher than the physical layer at the time of acquiring the present technology descriptor in FIG. It can be acquired quickly and processing time can be shortened.

(4) Operation example 2-2

(System pipe model)
FIG. 10 is a diagram illustrating a system pipe model of an operation example 2-2 corresponding to an operation mode when the signaling information of the ROUTE service and the MMT service is transmitted by a common PLP when the second method is adopted. is there.

  In FIG. 10, in a broadcast wave (RF Channel) having a predetermined frequency band (for example, 6 MHz), only PLP (PLP0) of PLPID which is “0” is transmitted. In PLP0, LLS signaling information and MMT signaling information streams are transmitted over IP / UDP, in addition to NTP, ROUTE service, and MMT service streams.

  That is, in the operation example 2-2 employing the second method, the LLS signaling information and the MMT signaling information are not represented as the L2 signaling information, but as the IP example, compared with the operation example 1-2 employing the first method. It is different in that it is transmitted on / UDP (transmitted by IP / UDP packet). In this case, the LLS signaling information and the MMT signaling information stored in the IP / UDP packet are specified by a fixed IP address and a port number, respectively.

  The receiving device 20 acquires the FIT transmitted as the LLS signaling information at the PLP0 and holds it as the channel selection information. In addition, when the ROUTE service is selected, the receiving device 20 acquires SLS signaling information transmitted in PLP0 based on the channel selection information (FIT), so that video, audio, and subtitle components are obtained. Can be played back.

  Thus, since PLP0 does not belong to the PLP group and is configured as a single PLP, LLS signaling information and component streams are transmitted by PLP0. That is, all signaling information and component streams related to a specific ROUTE service are transmitted by PLP0.

  In addition, when the MMT service is selected, the reception device 20 can reproduce the content D composed of video, audio, and subtitle components based on the MMT signaling information.

  Thus, since PLP0 does not belong to the PLP group and is configured as a single PLP, MMT signaling information and component streams are transmitted by PLP0. That is, all signaling information and component streams related to a specific MMT service are transmitted by PLP0.

(Description example of this technical descriptor)
Regarding the system pipe model (FIG. 10) of the operation example 2-2 configured as described above, whether or not the LLS signaling information and the MMT signaling information are transmitted for each PLP identified by the PLPID according to the present technology descriptor, The affiliation of the PLP group is as shown in FIG.

  In FIG. 11, since PLS0 transmits LLS signaling information and MMT signaling information (its stream), both ROUTE_SIGNALING_ENTRY and MMT_SIGNALING_ENTRY are set to “1”. Since PLP0 does not belong to the PLP group and is a single PLP, “00 0000” is set in PLP_GROUP_ID.

  As described above, in the operation example 2-2, the reception device 20 is configured to transmit the technology descriptor of FIG. 11 in the physical layer frame (the L1 signaling information), so that the reception device 20 performs the technology of FIG. When the descriptor is acquired, for example, it can be recognized that a stream related to the ROUTE service and the MMT service is transmitted using a common PLP. As a result, the receiving device 20 can perform processing according to, for example, the ROUTE service or the MMT service, so that a plurality of transport protocols can coexist.

  Also, with the present technology descriptor of FIG. 11, the receiving device 20 recognizes that both streams of LLS signaling information used in the ROUTE service and MMT signaling information used in the MMT service are transmitted in PLP0. be able to. Therefore, for example, the receiving device 20 can recognize the existence and type of signaling information transmitted in a layer higher than the physical layer at the time of obtaining the present technology descriptor in FIG. It can be acquired quickly and processing time can be shortened.

<4. Signaling Transmission Method>

(Layer structure)
FIG. 12 is a diagram for explaining the concept of the layer structure corresponding to ATSC 3.0.

  In FIG. 12, an IP packet (IP packet) is transmitted in layer 3 (L3). The IP packet includes an IP header (IP Header), a UDP header (UDP Header), and data (Data). That is, the IP packet is an IP / UDP packet including a UDP packet. In the data of the IP packet (IP / UDP packet), a packet (ROUTE packet or MMT packet) corresponding to the service, NTP, or the like is arranged.

  In layer 2 (L2), a generic packet as a transmission packet is transmitted. The generic packet is composed of a generic header and a payload. In the payload of the generic packet, one or a plurality of IP packets are arranged and encapsulated.

  Here, when the first scheme is adopted, the LLS signaling information or the MMT signaling information is arranged as L2 signaling information in the payload of the generic packet.

  That is, as indicated by T1 in the figure, when a ROUTE service stream is transmitted, LLS signaling information such as FIT is arranged in the payload of the generic packet. On the other hand, when an MMT service stream is transmitted, MMT signaling information is arranged in the payload of the Generic packet.

  Further, when the second scheme is adopted, the LLS signaling information or the MMT signaling information is arranged in the IP / UDP packet.

  That is, when a ROUTE service stream is transmitted, LLS signaling information such as FIT is arranged as data of the IP / UDP packet as indicated by T2 in the figure. In this case, in the IP / UDP packet data, a ROUTE packet storing SLS signaling information and component data is arranged as data corresponding to the ROUTE service. On the other hand, when an MMT service stream is transmitted, MMT signaling information is arranged as IP / UDP packet data, as indicated by T2 in the figure. In this case, in the IP / UDP packet data, an MMT packet storing component data is arranged as data corresponding to the MMT service.

  A BB frame (Baseband Frame) of Layer 1 (L1) corresponding to the physical layer is composed of a BB frame header (Baseband Frame Header) and a payload (Payload). A plurality of generic packets are arranged and encapsulated in the payload of the BB frame. Further, in layer 1, data (Data) obtained by scrambling a plurality of BB frames is mapped to an FEC frame (FEC Frame), and a physical layer error correction parity (Parity) is added.

  A physical layer frame (ATSC (Physical) Frame) of layer 1 (L1) includes a bootstrap, a preamble, and a data part (Data). In the data part of the physical layer frame, after performing bit interleaving on a plurality of FEC frames, mapping processing is performed, and further, physical layer processing such as interleaving in the time direction and the frequency direction is performed. The data obtained by the mapping is mapped.

  Here, the above-described technical descriptor (FIG. 3) can be arranged in the bootstrap or preamble of the physical layer frame as indicated by T3 in the figure. For example, L1-post signaling information is arranged in the preamble of the physical layer frame, and the contents of the technical descriptor can be described there.

(L1-post signaling structure)
FIG. 13 is a diagram illustrating an example of a syntax of L1-post signaling corresponding to ATSC 3.0, which is arranged in a preamble.

  In FIG. 13, 1-bit ROUTE_SIGNALING_ENTRY, 1-bit MMT_SIGNALING_ENTRY, and 6-bit PLP_GROUP_ID defined in this technical descriptor are arranged instead of the 8-bit PLP_GROUP_ID arranged in the PLP loop. Like that. As a result, information representing whether or not LLS signaling information and MMT signaling information are transmitted and the affiliation of the PLP group for each PLP identified by the PLPID is transmitted as L1 signaling information of the physical layer.

  Note that FIG. 13 shows the case where the content of this technical descriptor is arranged in the PLP loop of the L1-post signaling information, but the arrangement in the L1-post signaling information is an example, It may be arranged at a place. For example, it may be arranged in the bootstrap (FIG. 12) of the physical layer frame.

(Bootstrap structure)
FIG. 14 is a diagram showing a bootstrap structure of the physical frame of FIG.

  FIG. 14 shows that bootstrap symbols 1 to 3 are transmitted by a bootstrap signal when the horizontal direction is time and the vertical direction is frequency. However, each bootstrap symbol can transmit a signal of up to 11 bits.

  As shown in the syntax of FIG. 15, the bootstrap symbol 1 includes 1-bit easy_wake_up, 2-bit system_bandwidth, and 5-bit min_time_to_next. As shown in the syntax of FIG. 16, the bootstrap symbol 2 includes 7-bit bsr_coefficient. As shown in the syntax of FIG. 17, the bootstrap 3 includes 6-bit preamble_structure and 1-bit num_ldm_layers.

  Here, Ns = 4 and bootstrap symbols 1 to 3 are transmitted. However, by setting the value of Ns to a value larger than 4, bootstrap symbols corresponding to the number of PLPs to be used can be obtained. By definition, ROUTE_SIGNALING_ENTRY, MMT_SIGNALING_ENTRY, and PLP_GROUP_ID of each PLP can be transmitted as a bootstrap signal (L1 signaling information).

  FIG. 18 shows that bootstrap symbols 1 to 67 are transmitted as bootstrap signals when the horizontal direction is time and the vertical direction is frequency. However, in ATSC3.0, since up to 64 PLPs can be arranged in one frequency band, 64 bootstrap symbols 4 to 67 are added to the bootstrap symbols 1 to 3 described above. Yes. Each bootstrap symbol can transmit a signal of up to 11 bits.

  As shown in the syntax of FIG. 19, the bootstrap symbol 4 includes 1-bit ROUTE_SIGNALING_ENTRY, 1-bit MMT_SIGNALING_ENTRY, and 6-bit PLP_GROUP_ID for PLP0. Similarly, each of the bootstrap symbols 5 to 67 includes 1-bit ROUTE_SIGNALING_ENTRY, 1-bit MMT_SIGNALING_ENTRY, and 6-bit PLP_GROUP_ID for each PLP (any one of PLP1 to PLP63).

  However, among the bootstrap symbols 5 to 67, the syntax of the bootstrap symbol 5 is illustrated in FIG. 20, and the syntax of the bootstrap symbol 67 is illustrated in FIG. 18 to 21 exemplify the case where 64 PLPs, which is the maximum number of ATSC 3.0 PLPs, are used, but in actuality, bootstrap symbols corresponding to the number of PLPs to be used are used. Is used.

<5. Configuration of each device>

  Next, detailed configurations of the transmission device 10 and the reception device 20 that constitute the transmission system 1 of FIG. 1 will be described.

(Configuration of transmitter)
FIG. 22 is a diagram illustrating a configuration example of the transmission device 10 of FIG.

  22, the transmission apparatus 10 includes a control unit 101, a component acquisition unit 102, an encoder 103, a signaling generation unit 104, a signaling processing unit 105, a packet generation unit 106, a physical layer frame generation unit 107, and a transmission unit 108. Is done.

  The control unit 101 controls the operation of each unit of the transmission device 10.

  The component acquisition unit 102 acquires data (components) of video, audio, subtitles, and the like constituting content (for example, a TV program) provided by a specific service (for example, ROUTE service or MMT service) and supplies the data to the encoder 103. To do. The encoder 103 encodes data (components) such as video and audio supplied from the component acquisition unit 102 according to a predetermined encoding method, and supplies the encoded data to the packet generation unit 106.

  In addition, as content, for example, the corresponding content is acquired according to the broadcast time zone from the storage location of the already recorded content, or live content is acquired from the studio or location location.

  The signaling generation unit 104 acquires raw data for generating signaling information from an external server, a built-in storage, or the like. The signaling generation unit 104 generates signaling information using raw data of signaling information.

  Here, L1 signaling information and signaling information corresponding to the service are generated as the signaling information. For example, as the L1 signaling information, L1-post signaling information, bootstrap information, and the like are generated. In addition, when a ROUTE service stream is transmitted, LLS signaling information and SLS signaling information are generated. In addition, when an MMT service stream is transmitted, MMT signaling information is generated.

  Among such signaling information, the LLS signaling information, the SLS signaling information, and the MMT signaling information are supplied to the packet generator 106, and the L1-post signaling information and the bootstrap information are the physical layer frame generator 107. To be supplied.

  However, at least one of the L1-post signaling information and the bootstrap information includes the presence / absence of transmission of the LLS signaling information and the MMT signaling information and the PLP group specified in this technical descriptor (FIG. 3). Transmission information (ROUTE_SIGNALING_ENTRY, MMT_SIGNALING_ENTRY, PLP_GROUP_ID) representing the affiliation can be arranged.

  For example, when the present technology descriptor is arranged in the L1-post signaling information, the transmission information is arranged in the PLP loop of the L1-post signaling information (FIG. 13). Further, for example, when the present technology descriptor is arranged in the bootstrap information, the transmission information is arranged in a bootstrap symbol (FIG. 18) corresponding to the number of PLPs used.

  The packet generation unit 106 uses data (components) such as video and audio supplied from the encoder 103 and signaling information supplied from the signaling processing unit 105, and uses a packet (ROUTE packet or MMT packet) according to the service, Generate IP packets (IP / UDP packets). Further, the packet generation unit 106 encapsulates one or a plurality of IP packets to generate a generic packet and supplies it to the physical layer frame generation unit 107.

  Specifically, when the ROUTE service stream is transmitted when the first method is adopted, the IP / UDP packet data includes SLS signaling information and component data as data corresponding to the ROUTE service. Stored ROUTE packet is placed. In the generic packet payload, an IP / UDP packet storing the ROUTE packet and LLS signaling information as L2 signaling information are arranged.

  In addition, when the MMT service stream is transmitted when the first method is adopted, an MMT packet storing component data is arranged in the IP / UDP packet data as data corresponding to the MMT service. The In the generic packet payload, an IP / UDP packet storing the MMT packet and MMT signaling information as L2 signaling information are arranged.

  On the other hand, when the ROUTE service stream is transmitted when the second method is adopted, the IP / UDP packet data includes the SLS signaling information and the ROUTE packet storing the component data, as well as the LLS signaling information. Is placed. In the generic packet payload, an IP / UDP packet storing the ROUTE packet and LLS signaling information is arranged.

  When the second scheme is adopted and an MMT service stream is transmitted, MMT signaling information is arranged in the IP / UDP packet data in addition to the MMT packet storing the component data. In the generic packet payload, an IP / UDP packet storing the MMT packet and MMT signaling information is arranged.

  The physical layer frame generation unit 107 generates a physical layer frame by encapsulating a plurality of generic packets supplied from the packet generation unit 106 and supplies the generated physical layer frame to the transmission unit 108. However, in the physical layer frame, bootstrap information supplied from the signaling processing unit 105 is arranged in the bootstrap, and L1-post signaling information supplied from the signaling processing unit 105 is arranged in the preamble.

  In other words, L1 signaling information such as L1-post signaling information and bootstrap information includes the presence / absence of transmission of LLS signaling information and MMT signaling information and the affiliation of the PLP group specified in this technical descriptor (FIG. 3). Since the represented transmission information (ROUTE_SIGNALING_ENTRY, MMT_SIGNALING_ENTRY, PLP_GROUP_ID) is included, this information is arranged in the bootstrap or preamble of the physical layer frame.

  The transmission unit 108 performs processing such as OFDM (Orthogonal Frequency Division Multiplexing) modulation on the physical layer frame supplied from the physical layer frame generation unit 107 and transmits the processed physical layer frame as a digital broadcast signal via the antenna 111.

  In FIG. 22, the signaling generation unit 104 has been described as generating signaling information. However, the packet generation unit 106 or the physical layer frame generation unit 107 may generate the signaling information. For example, the packet generation unit 106 can generate LLS signaling information, SLS signaling information, or MMT signaling information and store it in the packet. Further, for example, the physical layer frame generation unit 107 can generate L1-post signaling information or bootstrap information and arrange it in the physical layer frame. Further, in the transmission device 10 of FIG. 22, it is not necessary that all the functional blocks are physically arranged in a single device, and at least some of the functional blocks are physically independent from other functional blocks. It may be configured as a device.

(Receiver configuration)
FIG. 23 is a diagram illustrating a configuration example of the receiving device 20 of FIG.

  In FIG. 23, the receiving apparatus 20 includes a control unit 201, a receiving unit 202, a physical layer frame processing unit 203, a packet processing unit 204, a signaling processing unit 205, a decoder 206, a display unit 207, and a speaker 208.

  The control unit 201 controls the operation of each unit of the receiving device 20.

  The reception unit 202 receives the digital broadcast signal transmitted from the transmission device 10 via the antenna 211, performs processing such as OFDM demodulation, and converts the physical layer frame obtained thereby into the physical layer frame processing unit. 203.

  The physical layer frame processing unit 203 performs processing on the physical layer frame supplied from the receiving unit 202, extracts a generic packet, and supplies the generic packet to the packet processing unit 204. Also, the physical layer frame processing unit 203 acquires bootstrap information arranged in the bootstrap of the physical layer frame and L1-post signaling information arranged in the preamble, and supplies the acquired information to the signaling processing unit 205.

  The packet processing unit 204 performs processing on the generic packet supplied from the physical layer frame processing unit 203. Further, the packet processing unit 204 performs processing on an IP packet (IP / UDP packet) extracted from the generic packet and a packet (ROUTE packet or MMT packet) corresponding to the service, and extracts signaling information and component data. The signaling information is supplied to the signaling processing unit 205, and the component data is supplied to the decoder 206.

  Specifically, when the first method is adopted in the transmission apparatus 10 on the transmission side described above, when the ROUTE service stream is transmitted, the LLS signaling information as the L2 signaling information is transmitted from the payload of the generic packet. Is extracted, and SLS signaling information and component data are extracted from the ROUTE packet stored in the IP / UDP packet.

  In addition, when the first method is adopted, when an MMT service stream is transmitted, MMT signaling information as L2 signaling information is extracted from the payload of the generic packet and stored in the IP / UDP packet. Component data is extracted from the packet.

  On the other hand, when the second method is adopted in the transmission apparatus 10 on the transmission side described above, when the ROUTE service stream is transmitted, the LLS signaling is started from the IP / UDP packet arranged in the payload of the generic packet. Information is extracted, and SLS signaling information and component data are extracted from the ROUTE packet stored in the IP / UDP packet.

  In addition, when the second method is adopted, when an MMT service stream is transmitted, MMT signaling information is extracted from the IP / UDP packet arranged in the payload of the generic packet, and is transmitted to the IP / UDP packet. Component data is extracted from the stored MMT packet.

  The signaling processing unit 205 appropriately processes the signaling information supplied from the physical layer frame processing unit 203 and the packet processing unit 204 and supplies it to the control unit 201.

  Here, L1 signaling information and signaling information corresponding to the service are processed as the signaling information. For example, L1-post signaling information, bootstrap information, etc. are processed as L1 signaling information. Further, when the ROUTE service stream is transmitted, the LLS signaling information and the SLS signaling information are processed. Also, when the MMT service stream is transmitted, the MMT signaling information is processed.

  However, at least one of the L1-post signaling information and the bootstrap information includes the presence / absence of transmission of LLS signaling information and MMT signaling information and the affiliation of the PLP group as defined in this technical descriptor (FIG. 3). The represented transmission information (ROUTE_SIGNALING_ENTRY, MMT_SIGNALING_ENTRY, PLP_GROUP_ID) is arranged.

  For example, when the present technology descriptor is arranged in the L1-post signaling information, the transmission information is arranged in the PLP loop of the L1-post signaling information (FIG. 13). Further, for example, when the present technology descriptor is arranged in the bootstrap information, the transmission information is arranged in bootstrap symbols (FIG. 18) corresponding to the number of PLPs used.

  The control unit 201 controls the operation of each unit based on the signaling information supplied from the signaling processing unit 205. For example, the control unit 201 controls processing performed by the physical layer frame processing unit 203 and the packet processing unit 204 based on L1-post signaling information, bootstrap information, and the like.

  Further, for example, when the ROUTE service is selected, the control unit 201 controls packet filtering performed by the packet processing unit 204 based on the LLS signaling information and the SLS signaling information, and the video, audio, etc. ) Data (ROUTE packet) is supplied to the decoder 206. For example, when the MMT service is selected, the control unit 201 controls packet filtering performed by the packet processing unit 204 based on the MMT signaling information, and data (components) of video, audio, and the like (components thereof) MMT packet) is supplied to the decoder 206.

  The decoder 206 decodes data (components) such as video and audio supplied from the packet processing unit 204 according to a predetermined decoding method, and supplies the resulting video data to the display unit 207. Audio data is supplied to the speaker 208.

  The display unit 207 displays video corresponding to the video data supplied from the decoder 206. Further, the speaker 208 outputs sound corresponding to the audio data supplied from the decoder 206. As a result, the receiving device 20 outputs video and audio of content (for example, a television program) provided by a service (ROUTE service or MMT service) selected by the user.

  In FIG. 23, the signaling processing unit 205 has been described as processing signaling information. However, the physical layer frame processing unit 203 or the packet processing unit 204 may process the signaling information. For example, the physical layer frame processing unit 203 can process L1-post signaling information or bootstrap information. For example, the packet processing unit 204 can process LLS signaling information, SLS signaling information, or MMT signaling information. Further, in FIG. 23, the configuration in which the display unit 207 and the speaker 208 are incorporated as a case where the receiving device 20 is a fixed receiver such as a television receiver or a mobile receiver such as a smartphone or a tablet terminal. However, for example, in the case of a recorder, a set top box (STB), the display unit 207 and the speaker 208 are provided outside.

<6. Flow of processing executed by each device>

  Next, with reference to the flowcharts of FIGS. 24 to 25, the flow of processing executed by each device constituting the transmission system 1 of FIG. 1 will be described.

(Transmission process)
First, the flow of transmission processing executed by the transmission device 10 of FIG. 1 will be described with reference to the flowchart of FIG.

  In step S101, the component acquisition unit 102 acquires components such as video and audio. The component data acquired by the component acquisition unit 102 is encoded by the encoder 103.

  In step S102, the signaling generation unit 104 generates signaling information. Here, L1-post signaling information and bootstrap information are generated as the L1 signaling information. Further, when a ROUTE service stream is transmitted, LLS signaling information and SLS signaling information are generated. Also, when an MMT service stream is transmitted, MMT signaling information is generated.

  In step S103, packet / frame generation processing is performed.

  In this packet / frame generation process, the packet generation unit 106 generates a ROUTE packet, an MMT packet, an IP packet (IP / UDP packet), or a generic packet. Further, the physical layer frame generation unit 107 generates a physical layer frame.

  Here, when the ROUTE service stream is transmitted in common with the first method and the second method, SLS signaling information and component data are arranged in the ROUTE packet stored in the IP / UDP packet. When the MMT service stream is transmitted, component data is arranged in the MMT packet stored in the IP / UDP packet.

  Further, when the first method is adopted, when the ROUTE service stream is transmitted, the LLS signaling information is arranged in the payload of the Generic packet, and when the MMT service stream is transmitted, the Generic packet MMT signaling information is arranged in the payload. Further, when the second method is adopted, when the ROUTE service stream is transmitted, the LLS signaling information is arranged in the data of the IP / UDP packet, and when the MMT service stream is transmitted, the IP MMT signaling information is arranged in the data of the / UDP packet.

  Furthermore, in the PLP loop of the L1-post signaling information arranged in the preamble of the physical layer frame or in the bootstrap information arranged in the bootstrap, transmission information defined as this technical descriptor (FIG. 3) (ROUTE_SIGNALING_ENTRY, MMT_SIGNALING_ENTRY, PLP_GROUP_ID) will be allocated.

  In step S <b> 104, the transmission unit 108 performs processing on the physical layer frame and transmits it as a digital broadcast signal via the antenna 111.

  The flow of transmission processing has been described above.

(Reception processing)
Next, the flow of reception processing executed by the reception device 20 in FIG. 1 will be described with reference to the flowchart in FIG. This reception process is a process executed when a specific service such as the ROUTE service or the MMT service is selected.

  In step S <b> 201, the reception unit 202 receives the digital broadcast signal transmitted from the transmission device 10 via the antenna 211.

  In step S202, packet / frame processing is performed.

  In this packet / frame processing, the physical layer frame processing unit 203 processes the physical layer frame. Further, the packet processing unit 204 performs processing on generic packets, IP packets (IP / UDP packets), ROUTE packets, or MMT packets.

  In step S203, the signaling processing unit 205 processes the signaling information from the physical layer frame processing unit 203 or the packet processing unit 204. The control unit 201 controls the operation of each unit based on the processing result of the signaling information by the signaling processing unit 205.

  Here, for example, in the PLP loop of the L1-post signaling information arranged in the preamble of the physical layer frame or in the bootstrap information arranged in the bootstrap, it is defined as this technical descriptor (FIG. 3). Transmission information (ROUTE_SIGNALING_ENTRY, MMT_SIGNALING_ENTRY, PLP_GROUP_ID) is arranged, the signaling processing unit 205 supplies the processing result of the L1 signaling information to the control unit 201.

  Based on the transmission information (ROUTE_SIGNALING_ENTRY, MMT_SIGNALING_ENTRY, PLP_GROUP_ID), the control unit 201 recognizes in which transport protocol the service stream transmitted by each PLP is transmitted, for example, ROUTE or MMT. It is possible to recognize a PLP transmitting signaling information used in services such as ROUTE service and MMT service. As a result, the control unit 201 controls the packet processing unit 204, the signaling processing unit 205, and the like to acquire LLS signaling information from a specific PLP among PLPs belonging to a PLP group that transmits a ROUTE service stream, for example. The MMT signaling information can be acquired from a specific PLP among the PLPs belonging to the PLP group that transmits the MMT service stream.

  Here, when the first method is adopted, when the ROUTE service is selected, the LLS signaling information is extracted from the payload of the generic packet, and when the MMT service is selected, the payload of the generic packet From this, MMT signaling information is extracted. Further, when the second method is adopted, when the ROUTE service is selected, the LLS signaling information is extracted from the IP / UDP packet, and when the MMT service is selected, the IP / UDP packet is used. , MMT signaling information is extracted.

  In step S204, the control unit 201 controls the operation of each unit based on the signaling information acquired by the signaling processing unit 205, so that the decoder 206 decodes component data such as video and audio. As a result, the video of the content is displayed on the display unit 207, and the sound is output from the speaker 208.

  Here, when the ROUTE service is selected in common with the first method and the second method, SLS signaling information and component data are extracted from the ROUTE packet stored in the IP / UDP packet. When the MMT service is selected, component data is extracted from the MMT packet stored in the IP / UDP packet.

  The flow of reception processing has been described above.

<7. Modification>

  As the above description, as the standard of digital broadcasting, ATSC (for example, ATSC 3.0) which is a method adopted in the United States and the like has been described, but ISDB (Integrated Services Digital Broadcasting) which is a method adopted by Japan and the like, Further, the present invention may be applied to DVB (Digital Video Broadcasting) which is a method adopted by European countries. Further, the transmission path 30 (FIG. 1) is not limited to terrestrial digital broadcasting, but may be employed for satellite digital broadcasting, digital cable television broadcasting, and the like.

  Further, the names of the signaling information such as FIT described above are merely examples, and other names may be used. Even if another name is used as the name of the signaling information, the name is merely changed formally, and the substantial content of the signaling information is not different.

<8. Computer configuration>

  The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software is installed in the computer. FIG. 26 is a diagram illustrating a configuration example of hardware of a computer that executes the above-described series of processing by a program.

  In the computer 900, a CPU (Central Processing Unit) 901, a ROM (Read Only Memory) 902, and a RAM (Random Access Memory) 903 are connected to each other by a bus 904. An input / output interface 905 is further connected to the bus 904. An input unit 906, an output unit 907, a recording unit 908, a communication unit 909, and a drive 910 are connected to the input / output interface 905.

  The input unit 906 includes a keyboard, a mouse, a microphone, and the like. The output unit 907 includes a display, a speaker, and the like. The recording unit 908 includes a hard disk, a nonvolatile memory, and the like. The communication unit 909 includes a network interface or the like. The drive 910 drives a removable medium 911 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

  In the computer 900 configured as described above, the CPU 901 loads the program recorded in the ROM 902 or the recording unit 908 to the RAM 903 via the input / output interface 905 and the bus 904, and executes the program. A series of processing is performed.

  A program executed by the computer 900 (CPU 901) can be provided by being recorded on a removable medium 911 as a package medium, for example. The program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.

  In the computer 900, the program can be installed in the recording unit 908 via the input / output interface 905 by attaching the removable medium 911 to the drive 910. Further, the program can be received by the communication unit 909 via a wired or wireless transmission medium and installed in the recording unit 908. In addition, the program can be installed in the ROM 902 or the recording unit 908 in advance.

  Here, in the present specification, the processing performed by the computer according to the program does not necessarily have to be performed in time series in the order described as the flowchart. That is, the processing performed by the computer according to the program includes processing executed in parallel or individually (for example, parallel processing or object processing). The program may be processed by one computer (processor), or may be processed in a distributed manner by a plurality of computers.

  The embodiments of the present technology are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present technology.

  Moreover, this technique can take the following structures.

(1)
A generating unit that generates transmission information indicating whether a stream of a service using a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard is transmitted;
A transmission apparatus comprising: a transmission unit configured to transmit the transmission information included in first control information disposed in a frame of a physical layer corresponding to the predetermined standard.
(2)
The transmission apparatus according to (1), wherein the transmission information includes information indicating whether or not second control information corresponding to the specific transport protocol is transmitted.
(3)
In the physical layer, data is transmitted for each PLP (Physical Layer Pipe) that can be grouped,
The transmission apparatus according to (2), wherein the transmission information further includes information for identifying a PLP group that is a group of the PLP.
(4)
Each PLP can belong to one or a plurality of the PLP groups. The transmitting apparatus according to (3).
(5)
The predetermined standard corresponds to an IP (Internet Protocol) transmission method,
The transmission device according to any one of (2) to (4), wherein the second control information is arranged and transmitted in a payload of a transmission packet capable of storing an IP packet.
(6)
The predetermined standard corresponds to the IP transmission method,
The transmission device according to any one of (2) to (4), wherein the second control information is arranged and transmitted in a UDP (User Datagram Protocol) packet included in the IP packet.
(7)
The predetermined standard is ATSC (Advanced Television Systems Committee) 3.0,
The transmission device according to any one of (1) to (6), wherein the plurality of transport protocols are ROUTE (Real-Time Object Delivery over Unidirectional Transport) and MMT (MPEG Media Transport).
(8)
The transmission apparatus according to (7), wherein the second control information includes signaling information corresponding to the ROUTE and signaling information corresponding to the MMT.
(9)
The transmission device according to (7) or (8), wherein the first control information is arranged in the bootstrap or the preamble in the physical layer frame including a bootstrap, a preamble, and a data part. .
(10)
In the transmission method of the transmission device,
The transmitting device is
Generating transmission information indicating whether a stream of a service using a specific transport protocol is transmitted among a plurality of transport protocols on a transport layer defined by a predetermined standard;
A transmission method including a step of transmitting the transmission information by including it in first control information arranged in a frame of a physical layer corresponding to the predetermined standard.
(11)
Transmission information indicating whether a service stream using a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard is transmitted, A receiving unit for receiving the transmission information included in the first control information arranged in a frame of a physical layer corresponding to the standard;
Based on the second control information corresponding to the specific transport protocol acquired according to the transmission information, the operation of each unit that processes the stream of the service using the specific transport protocol is controlled. And a control unit.
(12)
The receiving apparatus according to (11), wherein the transmission information includes information indicating whether or not the second control information is transmitted.
(13)
In the physical layer, data is transmitted for each of one or more PLPs that can be grouped,
The receiving apparatus according to (12), wherein the transmission information further includes information for identifying a PLP group that is a group of the PLP.
(14)
Each PLP can belong to one or a plurality of the PLP groups. The receiving device according to (13).
(15)
The predetermined standard corresponds to the IP transmission method,
The receiving apparatus according to any one of (11) to (14), wherein the second control information is arranged and transmitted in a payload of a transmission packet capable of storing an IP packet.
(16)
The predetermined standard corresponds to the IP transmission method,
The receiving apparatus according to any one of (11) to (14), wherein the second control information is arranged and transmitted in a UDP packet included in an IP packet.
(17)
The predetermined standard is ATSC3.0,
The receiving device according to (11), wherein the plurality of transport protocols are ROUTE and MMT.
(18)
The receiving apparatus according to (17), wherein the second control information includes signaling information corresponding to the ROUTE and signaling information corresponding to the MMT.
(19)
The receiving apparatus according to (17) or (18), wherein the first control information is arranged in the bootstrap or the preamble in the physical layer frame including a bootstrap, a preamble, and a data part. .
(20)
In the receiving method of the receiving device,
The receiving device is
Transmission information indicating whether a service stream using a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard is transmitted, Receiving the transmission information included in the first control information arranged in the frame of the physical layer corresponding to the standard;
Based on the second control information corresponding to the specific transport protocol acquired according to the transmission information, the operation of each unit that processes the stream of the service using the specific transport protocol is controlled. A receiving method including a step.

  DESCRIPTION OF SYMBOLS 1 Transmission system, 10 transmitter, 20 receiver, 30 transmission path, 101 control part, 102 component acquisition part, 104 signaling generation part, 105 signaling processing part, 106 packet generation part, 107 physical layer frame generation part, 108 transmission part , 201 control unit, 202 receiving unit, 203 physical layer frame processing unit, 204 packet processing unit, 205 signaling processing unit, 900 computer, 901 CPU

Claims (20)

A generating unit that generates transmission information indicating whether a stream of a service using a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard is transmitted;
A transmission apparatus comprising: a transmission unit configured to transmit the transmission information included in first control information disposed in a frame of a physical layer corresponding to the predetermined standard. The transmission apparatus according to claim 1, wherein the transmission information includes information indicating whether or not second control information corresponding to the specific transport protocol is transmitted. In the physical layer, data is transmitted for each PLP (Physical Layer Pipe) that can be grouped,
The transmission apparatus according to claim 2, wherein the transmission information further includes information for identifying a PLP group that is a group of the PLP. The transmission apparatus according to claim 3, wherein each PLP can belong to one or a plurality of the PLP groups. The predetermined standard corresponds to an IP (Internet Protocol) transmission method,
The transmission apparatus according to claim 4, wherein the second control information is arranged and transmitted in a payload of a transmission packet that can store an IP packet. The predetermined standard corresponds to the IP transmission method,
The transmission apparatus according to claim 4, wherein the second control information is arranged and transmitted in a UDP (User Datagram Protocol) packet included in the IP packet. The predetermined standard is ATSC (Advanced Television Systems Committee) 3.0,
The transmission apparatus according to claim 1, wherein the plurality of transport protocols are ROUTE (Real-Time Object Delivery over Unidirectional Transport) and MMT (MPEG Media Transport). The transmission apparatus according to claim 7, wherein the second control information includes signaling information corresponding to the ROUTE and signaling information corresponding to the MMT. The transmission apparatus according to claim 7, wherein the first control information is arranged in the bootstrap or the preamble in the physical layer frame including a bootstrap, a preamble, and a data part. In the transmission method of the transmission device,
The transmitting device is
Generating transmission information indicating whether a stream of a service using a specific transport protocol is transmitted among a plurality of transport protocols on a transport layer defined by a predetermined standard;
A transmission method including a step of transmitting the transmission information by including it in first control information arranged in a frame of a physical layer corresponding to the predetermined standard. Transmission information indicating whether a service stream using a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard is transmitted, A receiving unit for receiving the transmission information included in the first control information arranged in a frame of a physical layer corresponding to the standard;
Based on the second control information corresponding to the specific transport protocol acquired according to the transmission information, the operation of each unit that processes the stream of the service using the specific transport protocol is controlled. And a control unit. The receiving device according to claim 11, wherein the transmission information includes information indicating whether or not the second control information is transmitted. In the physical layer, data is transmitted for each of one or more PLPs that can be grouped,
The receiving apparatus according to claim 12, wherein the transmission information further includes information for identifying a PLP group that is a group of the PLP. The receiving device according to claim 13, wherein each PLP can belong to one or a plurality of the PLP groups. The predetermined standard corresponds to the IP transmission method,
The receiving apparatus according to claim 14, wherein the second control information is arranged and transmitted in a payload of a transmission packet that can store an IP packet. The predetermined standard corresponds to the IP transmission method,
The receiving apparatus according to claim 14, wherein the second control information is arranged and transmitted in a UDP packet included in an IP packet. The predetermined standard is ATSC3.0,
The receiving device according to claim 11, wherein the plurality of transport protocols are ROUTE and MMT. The receiving apparatus according to claim 17, wherein the second control information includes signaling information corresponding to the ROUTE and signaling information corresponding to the MMT. The receiving apparatus according to claim 17, wherein the first control information is arranged in the bootstrap or the preamble in a frame of the physical layer including a bootstrap, a preamble, and a data part. In the receiving method of the receiving device,
The receiving device is
Transmission information indicating whether a service stream using a specific transport protocol among a plurality of transport protocols on a transport layer defined by a predetermined standard is transmitted, Receiving the transmission information included in the first control information arranged in the frame of the physical layer corresponding to the standard;
Based on the second control information corresponding to the specific transport protocol acquired according to the transmission information, the operation of each unit that processes the stream of the service using the specific transport protocol is controlled. A receiving method including a step.

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