WO2018070244A1

WO2018070244A1 - Information processing device, information processing method, and program

Info

Publication number: WO2018070244A1
Application number: PCT/JP2017/034886
Authority: WO
Inventors: 山来　真木夫
Original assignee: ソニーセミコンダクタソリューションズ株式会社
Priority date: 2016-10-13
Filing date: 2017-09-27
Publication date: 2018-04-19
Also published as: JPWO2018070244A1; JP7033537B2

Abstract

The present invention stores, without excess or deficiency, management information on the MPEG-2 TS format specification, when an MMT format is converted to an MPEG-2 TS format. In a process for converting MMT format data to MPEG-2 TS format data, management information of the same type as that of MPEG-2 TS format specification is selected from a management information recording table of the MMT format specification, and recorded to a management information recording table of the MPEG-2 TS format specification. When a data format of management information for each format specification is different from another, the data format is converted to that of the MPEG-2 TS format specification and the converted data format is recorded.

Description

Information processing apparatus, information processing method, and program

The present disclosure relates to an information processing apparatus, an information processing method, and a program. More specifically, management information such as various control information and attribute information included in MMT (MPEG Media Transport) format data, which is being standardized as a future data transmission standard in broadcast waves, is recorded in the current media recording. In addition, the present invention relates to an information processing apparatus, an information processing method, and a program for performing processing for conversion into management information compatible with MPEG-2TS format data that is widely used as a data format for transfer.

At present, standardization for realizing high-quality image data transmission, such as broadcasting of 4K images and 8K images, is being promoted, and one of them is a data distribution method using the MMT (MPEG Media Transport) format. Is under consideration.

The MMT format is a data storage / transfer system for transmitting encoded data constituting content such as a broadcast program such as an image (Video), audio (Audio), subtitle (Subtitle), etc. via a broadcast wave or a network ( Container format / transport format).
The MMT format is a data storage / transfer method (container format / transport format) of content such as images (Video), audio (Audio), and subtitles (Subtitles). For example, 4K images, 8K images, or a high dynamic range ( HDR (High Dynamic Range) It is scheduled to be used for broadcasting next-generation content such as images.

On the other hand, the MPEG-2TS format is used as a recording format for content on current broadcasts and information recording media.
That is, for example, in the currently used television broadcasting, MPEG- is used as a data storage / transfer system (container format / transport format) of content including images (Video), audio (Audio), subtitles (Subtitles), and the like. 2TS format is used, and the format applied to data recording / playback on information recording media such as BD (Blu-ray (registered trademark) Disc) and flash memory is also MPEG-2TS format. It is.
Note that the data recording / playback processing configuration using BD is described in, for example, Japanese Patent Application Laid-Open No. 2011-023071.

As described above, the MPEG-2TS format is a data recording using an information recording medium (media) such as many current television sets, recording / playback apparatuses, communication apparatuses, etc., which perform data transmission / reception via broadcast waves and networks. This is a general format that is widely used in various devices such as a device that performs playback.

For example, DLNA (registered trademark) (Digital Living Network Alliance), which is a network communication standard, and DTCP-IP (Digital Transmission Content protection Protocol), which is a communication protocol that can prevent unauthorized copying of digital contents. A standard for data communication processing using the MPEG-2TS format is defined.

As described above, the MPEG-2TS format is currently used in many devices as a data recording and data transfer format for information recording media.

However, in the future, program contents distributed from broadcasting stations and the like are scheduled to be distributed in an MMT format different from the MPEG-2TS format.
In the future, it is considered that playback / recording apparatuses and communication devices that can perform playback, recording, and transmission / reception processing of MMT format data will become widespread, but many current playback devices and communication devices will process MMT format data. I can't.

Therefore, in order to make it possible to use content distributed from a broadcasting station in an existing device, MMT format data distributed from the broadcasting station or the like is converted into MPEG-2TS format data and an information recording medium such as a BD or a flash memory. It is necessary to perform processing such as recording or redistributing to other network connection devices.
However, at present, the specific processing for converting MMT format data into MPEG-2TS format data is not clearly defined at present.

JP 2011-023071 A

The present disclosure has been made in view of the above-described problems, for example, and various controls included in MMT (MPEG Media Transport) format data, which is being standardized as a future data transmission standard in broadcast waves and the like. Information processing apparatus and information processing method for performing processing for converting management information such as information and attribute information into management information compatible with MPEG-2TS format data which is widely used as a data format for current media recording and transfer It aims at providing a program.

The first aspect of the present disclosure is:
A data processing unit for converting MMT format data into MPEG-2TS format data;
The data processing unit
The management information is recorded in the management information recording table defined in the MPEG-2TS format.
There is an information processing apparatus that selects management information of the same type as the management information stipulated in the MPEG-2TS format from the management information recording table stipulated in the MMT format and records it in the management information recording table stipulated in the MPEG-2TS format.

Furthermore, the second aspect of the present disclosure is:
An information processing method executed in an information processing apparatus,
The information processing apparatus includes:
A data processing unit for converting MMT format data into MPEG-2TS format data;
The data processing unit is
Execute management information recording processing for the management information recording table defined in the MPEG-2TS format,
In the management information recording process,
There is an information processing method for executing processing for selecting management information of the same type as the management information defined in the MPEG-2 TS format from the management information recording table defined in the MMT format and recording it in the management information recording table defined in the MPEG-2 TS format. .

Furthermore, the third aspect of the present disclosure is:
A program for executing information processing in an information processing apparatus;
The information processing apparatus includes:
A data processing unit for converting MMT format data into MPEG-2TS format data;
The program is stored in the data processing unit.
Management information recording processing for the management information recording table defined in the MPEG-2TS format is executed,
In the management information recording process,
This is a program for executing the process of selecting the same type of management information as the management information defined in the MPEG-2TS format from the management information recording table defined in the MMT format and recording it in the management information recording table defined in the MPEG-2TS format.

Note that the program of the present disclosure is a program that can be provided by, for example, a storage medium or a communication medium provided in a computer-readable format to an information processing apparatus or a computer system that can execute various program codes. By providing such a program in a computer-readable format, processing corresponding to the program is realized on the information processing apparatus or the computer system.

Further objects, features, and advantages of the present disclosure will become apparent from a more detailed description based on embodiments of the present disclosure described below and the accompanying drawings. In this specification, the system is a logical set configuration of a plurality of devices, and is not limited to one in which the devices of each configuration are in the same casing.

According to the configuration of an embodiment of the present disclosure, a configuration for recording management information stipulated in the MPEG-2TS format without excess or deficiency when converting from the MMT format to the MPEG-2TS format is realized.
Specifically, for example, in the process of converting MMT format data into MPEG-2TS format data, management information of the same type as the management information defined in the MPEG-2TS format is selected from the management information recording table defined in the MMT format, Recorded in the management information recording table defined in the MPEG-2TS format. When the data format of the management information defined by each format is different, the data format is converted into a data format defined by the MPEG-2TS format and recorded.
With this configuration, when converting from the MMT format to the MPEG-2TS format, a configuration for recording management information stipulated in the MPEG-2TS format without excess or deficiency is realized.
Note that the effects described in the present specification are merely examples and are not limited, and may have additional effects.

It is a figure explaining the utilization structural example of the information processing apparatus which performs the process of this indication. FIG. 12 is a diagram for describing processing executed by the information processing apparatus. It is a figure explaining an MMT format. It is a figure explaining the example of an image data storage structure according to a MMT format. It is a figure explaining an MPEG-2TS format. It is a figure explaining an MPEG-2TS format. It is a figure explaining the example of a process which converts MMT format data into MPEG-2TS format data. It is a figure explaining the management information in a MMT format and a MPEG-2TS format. It is a figure explaining the management information recording table in MMT format and MPEG-2TS format. It is a figure explaining the data structure of MPT (MMT package table) prescribed | regulated to the MMT format. It is a figure explaining the data structure of PMT (program map table) prescribed | regulated to the MPEG-2TS format. It is a figure explaining the example of a recording process of the management information with respect to PMT (program map table) based on the management information recorded on MPT (MMT package table). It is a figure explaining the system of the recording process of the management information with respect to PMT (program map table). It is a figure explaining an example of the management information recording system P1 with respect to PMT (program map table). It is a figure explaining an example of the management information recording system P1 with respect to PMT (program map table). It is a figure explaining an example of the management information recording system P2 with respect to PMT (program map table). It is a figure explaining the TS remultiplexing process conditions at the time of format conversion, and the example of recording processing of management information. It is a figure explaining an example of the management information recording system P3 with respect to PMT (program map table). It is a figure explaining an example of the management information recording system P4 with respect to PMT (program map table). It is a figure explaining an example of the management information recording system P5 with respect to PMT (program map table). It is a figure explaining an example of the management information recording system P6 with respect to PMT (program map table). It is a figure explaining the data structure of SIT (selection information table) prescribed | regulated to the MPEG-2TS format. It is a figure explaining the example of a recording process of the management information with respect to SIT (selection information table) based on the management information recorded on the management information recording table of MMT format data. It is a figure explaining the system of the recording process of the management information with respect to SIT (selection information table). It is a figure explaining an example of management information recording system S1 with respect to SIT (selection information table). It is a figure explaining an example of management information recording system S2 with respect to SIT (selection information table). It is a figure explaining an example of management information recording system S3 with respect to SIT (selection information table). It is a figure explaining an example of management information recording system S4 with respect to SIT (selection information table). It is a figure explaining an example of management information recording system S5 with respect to SIT (selection information table). It is a figure explaining an example of management information recording system S6 with respect to SIT (selection information table). It is a figure explaining an example of management information recording system S7 with respect to SIT (selection information table). FIG. 11 is a diagram for describing a configuration example of an information processing apparatus that performs format conversion. It is a figure explaining the structure and process of a management information main building part. It is a figure which shows the flowchart explaining the recording processing sequence of the management information at the time of format conversion. It is a figure which shows the flowchart explaining the recording processing sequence of the management information at the time of format conversion. It is a figure which shows the flowchart explaining the recording processing sequence of the management information at the time of format conversion. It is a figure which shows the flowchart explaining the recording processing sequence of the management information at the time of format conversion. It is a figure which shows the flowchart explaining the recording processing sequence of the management information at the time of format conversion. It is a figure explaining the hardware structural example of the information processing apparatus applied to the process of this indication.

Hereinafter, the details of the information processing apparatus, the information processing method, and the program of the present disclosure will be described with reference to the drawings. The description will be made according to the following items.
1. 1. Configuration example of communication system 2. About MMT (MPEG Media Transport) format About the MPEG-2TS format 4. Format conversion processing from MMT format data to MPEG-2TS format data 5. Example of management information recording process for PMT (program map table) executed in format conversion process 6. Example of management information recording process for SIT (selection information table) executed in format conversion process 7. Configuration of information processing apparatus that executes format conversion processing 8. Management information recording processing sequence accompanying format conversion executed by information processing apparatus 8-1. Overall sequence of management information recording processing sequence accompanying format conversion executed by information processing apparatus 8-2. Program map table (PMT) generation processing sequence 8-3. 8. Selection information table (SIT) generation processing sequence 9. Configuration example of information processing apparatus Summary of composition of this disclosure

[1. Communication system configuration example]
First, an example of a communication system, which is an example of a usage configuration of an information processing apparatus that executes the processing of the present disclosure, will be described with reference to FIG.
The information processing apparatus 30 shown in FIG. 1 is loaded with media such as a BD (Blu-ray (registered trademark) Disc), flash memory, and hard disk (HDD), and performs data recording processing for these mounted media, Data replay processing or data redistribution via a network to other devices.

Data recorded on the medium by the information processing device 30 and data redistributed to other devices are transmission contents provided by the transmission device 20 such as the broadcast station (broadcast server) 21 or the data distribution server 22. Specifically, it is a broadcast program provided by a television station.
These transmission contents are transmitted from the transmission device 20 to the information processing device 30 via a broadcast wave or a network such as the Internet.

The information processing apparatus 30 is, for example, a BD recorder 31, a television 32, a PC 33, a portable terminal 34, etc. These information processing apparatuses are, for example, a BD (Blu-ray (registered trademark) Disc) 41, an HDD (hard disk) 42, and the like. Various media such as the flash memory 43 are mounted, and data recording processing and data reproduction processing from these media are executed.
Further, the information processing apparatus 30 includes an apparatus that executes data redistribution to other devices. For example, a device such as a home server that performs data transmission via a home network is also included.

The data transmitted from the transmission device 20 to the information processing device 30 is MMT format data 50 according to the MMT (MPEG Media Transport) format.
The MMT format defines the data storage method and transmission method when transmitting encoded data, which is content configuration data, such as images (Video), audio (Audio), and subtitles (Subtitles) via broadcast waves or networks. ing. It defines so-called container format and transport format.

The transmission apparatus 20 encodes the content data, generates a data file including the encoded data and the metadata of the encoded data, and stores the generated encoded data in an MMTP (MMT Protocol) packet defined in the MMT. Then, MMT format data 50 is generated and transmitted via a broadcast wave or a network.

The MMT format data 50 provided to the information processing device 30 by the transmission device 20 includes various information such as guide information such as a program guide, notification information, control information, and attribute information in addition to reproduction target data such as images, sounds, and captions. Management information is included.

The information processing apparatus 30 records the MMT format data received from the transmission apparatus 20 on various information recording media (media) such as the BD 41, the HDD (hard disk) 42, and the flash memory 43. Alternatively, it can be redistributed to other devices.
The information processing apparatus 30 itself that receives the MMT format data 50 can interpret the received MMT format data and perform a reproduction process and a recording process. , It does not have a processing function for MMT format data, for example, a data processing function such as data recording, reproduction, and communication.

The format currently used in many devices as a data recording and data transfer format for information recording media (media) is the MPEG-2TS format.
As described above, for example, the network communication standard DLNA (registered trademark) (Digital Living Network Alliance) and the DTCP-IP (Digital Transmission Content Internet Protocol), which is a communication protocol capable of preventing unauthorized copying of digital contents. And the like define a standard for data communication processing using the MPEG-2TS format.

As described above, the MPEG-2TS format is currently used in many devices as a data recording and data transfer format for information recording media (media), and many current playback devices and communication devices use MMT format data. Can't handle.

Although the information processing apparatus 30 shown in FIG. 1 can interpret and process the MMT format, many other devices cannot interpret the MMT format, and the information processing apparatus 30 records the MMT format data as information. Even if the information is recorded on the medium, many devices other than the information processing apparatus 30 cannot reproduce the MMT format data recorded on the information recording medium (media).
In addition, even a device that has received redistribution data of MMT format data from the information processing apparatus 30 cannot perform correct reproduction and recording processing of the received MMT format data.

In order to use MMT format data distributed from a broadcast station in the future with current equipment capable of processing only MPEG-2TS format data, the information processing apparatus 30 uses the MMT format data distributed from the broadcast station or the like. It is necessary to perform processing such as conversion to MPEG-2TS format data and recording on an information recording medium such as a BD or flash memory, or redistribution to another network connection device.

That is, as shown in FIG. 2, an information processing device 30 that receives MMT format data 50 from a transmission device 20 such as a broadcast station 21 or a data distribution server 22 includes an information recording medium (media) 40 such as a BD or a flash memory. When the distribution data is recorded on the mobile phone or when it is redistributed to another device, it is necessary to convert the MMT format data 50 into the MPEG-2TS format data 60 and record or redistribute it.

If recording processing or redistribution is executed with MMT format data, a playback device such as a current BD player, that is, a playback device that executes a playback process to which a playback program for playing back MPEG-2TS format data is applied. Can not play.

Note that the MMT format data 50 includes a large amount of management information such as control information and attribute information related to contents such as images, sounds, and captions.
The information processing apparatus 30 needs to extract the management information from the MMT format data 50 and correctly record it in the MPEG-2 TS format data 60.

By recording management information such as control information and attribute information related to contents such as images, audio, and subtitles as management information according to the MPEG-2TS format, and recording or redistributing the information on an information recording medium (media) The current equipment capable of processing only the MPEG-2TS format data can refer to the management information defined in the MPEG-2TS format, and can correctly perform processing such as reproduction, recording, and transfer of the MPEG-2TS format data. it can.

[2. About MMT (MPEG Media Transport format)]
As described above, data transmission from the transmission device 20 to the information processing device 30 is performed in accordance with the MMT (MPEG Media Transport) format.
The MMT format is encoded when storing encoded data, which is content configuration data, such as an image (Video), audio (Audio), subtitle (Subtitle), etc., in a recording medium (media) or transmitted via a broadcast wave or a network. It is a format that prescribes data storage formats such as data and transmission methods.
The MMT (MPEG Media Transport) format will be described with reference to FIG.

FIG. 3 is a diagram illustrating a stack model in the MMT format.
In the MMT stack model shown in FIG. 3, there is a physical layer (PHY) in the lowest layer. The physical layer is divided into a broadcast layer that performs broadcast processing and a broadband layer that performs network processing.
The MMT enables processing using two communication networks, a broadcast system and a network system.

There is a TLV (Type Length Value) layer as a higher layer of the physical layer (PHY). TLV is a format defining layer that defines a multiplexing method for IP packets. A plurality of IP packets are multiplexed and transmitted as TLV packets. TLV-SI (Signaling Information) is a transmission layer of signaling information according to the TLV format.

The signaling information includes configuration information necessary for receiving content (program) on the information processing apparatus 30 side, management information such as guide information such as a program guide, notification information, and control information.
The signaling information stored in the TLV packet generated in the TLV layer is TLV-SI, and the signaling information stored in the MMTP packet, which is a packet generated according to the MMT protocol, is MMT-SI shown in the highest layer. is there.

A UDP / IP layer is set on the TLV layer.
The UDP / IP layer can be divided into an IP layer and a UDP layer in detail, but is a layer that defines transmission for storing a UDP packet in the payload of the IP packet.
An MMT layer and a File delivery method layer are set on the UDP / IP layer.
The setting is such that the MMTP packet is stored in an IP packet and transmitted, and the method of transmitting data as an IP packet using the File delivery method, which is a data transmission method that does not use an MMTP packet, can be used together.

The following layers are set on the MMT layer.
Image (Video) data that is encoded image data in accordance with HEVC (High Efficiency Video Coding), which is an image encoding standard;
Audio data that is encoded audio data in accordance with AAC (Advanced Audio Coding) that is an audio encoding standard;
Subtitle data that is encoded subtitle data in accordance with TTML (Timed Text Markup Language) that is a subtitle encoding standard;
Signaling information (MMT-SI) transmitted using MMTP packets,
In addition, various applications written according to HTML5 (Hyper Text Markup Language 5),
Each of these data is stored in an MMTP packet and transmitted.

The signaling information (MMT-SI) is signaling information transmitted in an MMTP packet. Setting information necessary for receiving content (program) on the information processing apparatus 30 side, guide information such as a program guide, and notification Information, control information, and the like.

Note that time information (NTP: Network Time Protocol) is absolute time information and is directly stored in a UDP packet and transmitted.
Other data services for data distribution (Data services), content downloads, etc. (Contentdownload, etc.) can be distributed using a file distribution method (File delivery method) different from MMT.

As shown in FIG. 3, signaling information (MMT-SI) and application including various notification information and control information, and applications are transmitted by MMTP packets.

A specific configuration example of the MMTP packet will be described with reference to FIG.
FIG. 4 shows the following four types of data configuration examples.
(A) MPU (Media Presentation Unit)
(B) MMTP payroto (c) MMTP packet (d) TLV packet

(D) A TLV packet is a packet transmitted via a broadcast wave, and each header information of a UDP header, an IP header, and a TLV header is set in the TLV packet. The TLV packet is set as an individual packet for each data type.

That is, one type of data is stored in the TLV payload of one TLV packet. Specifically, for example, image (V), audio (A), caption (S), signaling information (MMT-SI) stored in the MMTP packet, signaling information (TLV-SI) transmitted in the TLV packet, these Any one type of data is stored in an individual TLV packet.

An example of the TLV payload that is the payload of the TLV packet is the MMTP packet shown in FIG.
The MMTP packet shown in FIG. 4C includes an MMTP header and an MMTP payload.

One type of data is stored in the MMTP payload of one MMTP packet. Specifically, for example, image (V), audio (A), caption (S), signaling information (MMT-SI) stored in the MMTP packet, and any one of these data is stored in an individual MMTP packet. Is done.

4A and 4B show the detailed configuration of image data stored in the MMTP payload of the MMTP packet shown in FIG.
FIG. 4B shows only the MMTP packet whose image data (V) is the MMTP payload in the MMTP packet shown in FIG.
The MMTP payload shown in FIG. 4B is composed of a header and a data unit.

As shown in FIG. 4A, the data unit stores image data and the following various parameters.
AU Delimiter (Access Unit Delimiter)
SPS (Sequence Parameter Set)
PPS (Picture Parameter Set)
SEIs (Supplemental Enhancement Information)
These parameters are parameters used for image display.

The MPU (Media Presentation Unit) shown in FIG. 4A is one data processing unit in the MMT format. The example shown in FIG. 4A is an example of an MPU of image data, which is the same unit as a GOP (Group of Pictures) as a so-called encoding / decoding processing unit.

Thus, for example, as shown in FIG. 4A, the image data is divided into parameters defined in the MMT format and image configuration data, and stored in the MMTP payload shown in FIG. 4B. It is configured as an MMTP packet shown in c).
Furthermore, the MMTP packet is set as the payload of the TLV packet shown in FIG. 4D, and the TLV packet is transmitted via a broadcast wave or a network.

It should be noted that MMTP packets and TLV packets in units of data types are also set and transmitted for each data such as voice and caption, and each MMT-SI data.
The TLV-SI is stored in the TLV packet without being stored in the MMTP packet and transmitted.

[3. About MPEG-2TS format]
The MMT format described above is a format that prescribes a data storage / transfer method (container format / transport format) such as encoded data such as 4K and 8K images scheduled to be distributed as broadcast content in the future. Is scheduled to be widely used.

On the other hand, the MPEG-2TS format is widely used as a data storage and transmission format for current broadcasting and data recording on an information recording medium.
Similarly to the MMT format, the MPEG-2TS format also stores encoded data, which is content configuration data, such as images (Video), audio (Audio), subtitles (Subtitles), etc., on a recording medium (media), or broadcast waves and networks. This format defines a data storage format (container format) and a transmission format (transport format) of encoded data or the like when transmitted via the network.
The MPEG-2TS format will be described below.

The MPEG-2TS format is a format standardized in ISO13818-1, and is used for data recording for BD (Blu-ray (registered trademark) Disc), current digital broadcasting, and the like.

A case where the MPEG-2TS format is recorded on a BD (Blu-ray (registered trademark) Disc) will be described with reference to FIG.
As shown in FIG. 5, the MPEG-2TS format in the case of recording on BD (Blu-ray (registered trademark) Disc) has the following characteristics.
As shown in FIG. 5A, the MPEG-2TS file is composed of an integer number of aligned units.
The size of the aligned unit is 6 kB (= 6144 bytes (2048 × 3 bytes)).
The aligned unit starts from the first byte of the source packet.

As shown in FIG. 5B, the source packet is 192 bytes long.
As shown in FIG. 5C, one source packet includes a TP_extra_header and a TS packet. The TP_extra_header is 4 bytes long, and the TS packet is 188 bytes long.

As shown in FIG. 5D, the TS packet has a header (TP header) and a payload portion. The payload of one TS packet stores control data such as encoded data of any one kind of data such as image and sound, or attribute information.
As shown in FIG. 5E, a PID (packet ID) indicating the data type of the payload is recorded in the header (TP header) of the TS packet.

The payload of the TS packet includes a packet (packetized elementary stream (PES)) that stores encoded stream data such as images and audio (a packetized elementary stream (PES)), a PES header that stores playback time information, and content. Attribute information, control information, etc. corresponding to are stored.
The management information such as attribute information and control information stored in the payload of the TS packet is specifically information called PSI / SI (Program Specific Information / Service Information).
The PSI / SI includes, for example, a program map table (PMT: Program Map Table) and a selection information table (Selection Information Table).

The program map table (PMT: Program Map Table) includes a map as correspondence information between the PID of the TS packet and the data type. An information processing apparatus that performs processing on a TS packet first confirms and confirms a PID corresponding to a data type such as management information such as image, audio, caption, and other control information and attribute information by referring to the PMT. Based on the PID corresponding to the data type, the received packet is separated by data type, and processing corresponding to each data type is performed.

The selection information table (SIT: Selection Information Table) is a table in which only specific selected management information is recorded, and is judged to be necessary when MPEG-2TS is recorded on an information recording medium or when transfer processing is performed. 3 is a table in which management information corresponding to partial TS data composed of partial MPEG-2 TS data is recorded.

The detailed structure of the program map table (PMT: Program Map Table) and the selection information table (SIT: Selection Information Table) will be described later.

As shown in FIG. 5E, the following information is stored in the header information of the TS packet.
(A) Byte for synchronization (Sync byte)
(B) Transport error identifier (Transport_error_indicator)
(C) Payload unit start identifier (Payload_unit_start_indicator)
(D) Transport priority (Transport_priority)
(E) Packet ID (PID)
(F) Transport scrambling control (Transport scrambling control)
(G) Adaptation field control (Adaptation field control)
(H) Continuity counter
(I) Adaptation field (Adaptation field)

Next, an example of data stored in a transport packet (TS packet) that is a component of a transport stream file will be described with reference to FIG.
The transport packet (TS packet) in FIG. 6D corresponds to the transport packet (TS packet) illustrated in FIG.

A TS packet has a header (TP header) and a payload portion. The payload of one TS packet stores control data such as encoded data of any one kind of data such as image and sound, or attribute information.
As shown in FIG. 5E, a PID (packet ID) indicating the data type of the payload is recorded in the header (TP header) of the TS packet.

The payload of the TS packet includes a packet (packetized elementary stream (PES)) that stores encoded stream data such as images and audio (a packetized elementary stream (PES)), a PES header that stores playback time information, and content. Attribute information, control information, etc. corresponding to are stored.

As described above, management information such as attribute information and control information stored in the payload of the TS packet is specifically information called PSI / SI (Program Specific Information), for example.
As described above, the PSI / SI includes, for example, a program map table (PMT: Program Map Table) and a selection information table (SIT: Selection Information Table).

[4. About format conversion processing from MMT format data to MPEG-2TS format data]
Next, an example of format conversion processing from MMT format data to MPEG-2TS format data executed by the information processing apparatus 30 shown in FIGS. 1 and 2 will be described with reference to FIG.

FIG. 7 shows an example of the format conversion process executed by the information processing apparatus 30.
The information processing apparatus 30 inputs MMT format data 50 received from the transmission apparatus 20 such as a broadcast server (broadcast station) 21, for example. The MMT format data 50 is the MMT format data described above with reference to FIG.
The information processing apparatus 30 generates partial TS format data 60 shown in FIG. 7 based on the MMT format data 50.

Partial TS format data is a format specified as MPEG-2TS format data for recording or redistribution on an information recording medium (media), and is an association of radio wave industry association (ARIB) that specifies digital broadcasting standards. (Radio Industries and Businesses).

The partial TS format data 60 extracts management information such as control information necessary for the reproduction processing of the reproduction target data such as images, sound, and subtitles and the reproduction target data from the full format MPEG-2 TS format data. The format specified by the Japan Radio Industry Association (ARIB) as a format that reduces the amount of data suitable for media recording and transfer processing.
As illustrated in FIG. 7, the information processing apparatus 30 generates the partial TS format data 60 based on the MMT format data 50.

The example shown in FIG. 7 is an example in which partial TS format data 60 is generated by format conversion. However, a configuration for generating full-format MPEG-2 TS format data based on MMT format data 50, or a partial TS The processing of the present disclosure can also be applied when generating TS format data having a data configuration different from that of the format data 60.
That is, the partial TS format is a form of the MPEG-2TS format, and the MPEG-2TS format in the following description includes the partial TS format.

One of the important processes in the format conversion from the MMT format to the MPEG-2TS format is management information such as control information and attribute information included in the MMT format data 50, and MPEG-2TS format such as the partial TS format data 60. This is a process of recording as prescribed management information.

The management information included in the MMT format data 50 and the management information included in the partial TS format data 60 will be described with reference to FIG.
In the (1) MMT format data shown in FIG. 8, as shown as (11) management information under (1) MMT format data, the following areas are set as management information recording areas.
TLV signaling information (TLV-SI)
MMT signaling information (MMT-SI)

As described above with reference to FIG. 3, the signaling information includes setting information necessary for receiving content (such as a program) on the information processing apparatus 30 side, guide information such as a program guide, and notification information, It consists of management information such as control information.
The signaling information stored in the TLV packet that is generated in the TLV layer is TLV signaling information (TLV-SI), and the signaling information stored in the MMTP packet that is a packet generated according to the MMT protocol is stored in the highest layer. MMT signaling information (MMT-SI) shown.

Specifically, the two types of management information (TLV-SI, MMT-SI) shown in FIG. 8 (11) are, as shown in FIG. 8 (12), a plurality of tables (TLV-NIT, MH-BIT, ..., MPT, ...).
Further, as shown in FIG. 8 (13), various management information is recorded as descriptors in these tables.

The descriptor (Descriptor) is, for example, data that defines the types and contents of various management information related to the content (program) provided by the broadcasting station. Each table includes a plurality of various descriptors (descriptor 1). , 2, 3... Can be recorded.

For example, there are the following descriptors.
A descriptor (service descriptor) indicating the name of the broadcasting station indicating the provider of the content (program),
Descriptor (content descriptor) that indicates the content (program) (performers, etc.)
Descriptor (copy control descriptor) indicating copy permission information of content (program)
Descriptor (parental information descriptor) indicating the age limit for viewing content (program)
Note that the above is an example of a descriptor, and the MMT format defines many other descriptors, and various management information corresponding to each descriptor is recorded in the table.

On the other hand, in the partial TS (MPEG-2TS) format data, as shown in (21) management information below (2) partial TS (MPEG-2TS) format data in FIG. Each area is set.
Program structure information (PSI)
Service information (SI)

As described above with reference to FIGS. 5 and 6, a packet (packetized elementary stream (packetized elementary stream) (ES) that is encoded data such as an image or sound is stored in the payload of the TS packet. PES)), PES header storing reproduction time information, etc., attribute information corresponding to content, control information, etc. are stored.
Management information such as attribute information and control information stored in the payload of the TS packet is information called PSI / SI (Program Specific Information / Service Information).

As shown in FIG. 8 (22), the PSI / SI includes tables such as a program map table (PMT: Program Map Table) and a selection information table (Selection Information Table), for example.

Furthermore, as shown in FIG. 8 (23), various management information is recorded in these plural tables as descriptors (Descriptors).
The management information recording configuration in units of descriptors (Descriptors) is the same as the configuration of each table in the MMT format.

However, the descriptor defined in the MMT format and the descriptor defined in the MPEG-2TS format do not completely match.
That is, for example, the following setting descriptors are mixed.
(A) a descriptor with a definition that matches in both formats,
(B) descriptors with similar definitions in both formats,
(C) a descriptor defined only in one format;

FIG. 9 is a diagram showing an example of a table in which management information defined in the MMT format and the MPEG-2TS format (or partial TS format) is recorded.

(1) The MMT format includes the following management information recording table.
(12a) TLV-NIT (network information table)
(12b) MH-BIT (Broadcaster information table)
(12c) MH-SDT (service description table)
(12d) MH-EIT (event information table)
(12e) MH-TOT (Time Offset Table)
(12f) MPT (MMT package table)

(12a) TLV-NIT (network information table) is a table included in the TLV signaling information (TLV-SI), and is a table in which a combination of TLV streams and tuning information is recorded.
(12b) The MH-BIT (broadcaster information table) is a table included in the MMT signaling information (MMT-SI), and is a table in which information on broadcasters on the network is recorded.

(12c) The MH-SDT (service description table) is a table included in the MMT signaling information (MMT-SI), and is a table in which channel related information such as a channel name and a broadcaster name is recorded.
(12d) The MH-EIT (event information table) is a table included in the MMT signaling information (MMT-SI), and records content related information such as the name of the content (program, etc.), the broadcast date and time, and the description of the content. It is a table.

(12e) The MH-TOT (time offset table) is a table included in the MMT signaling information (MMT-SI), and is a table in which date-related information such as the current date and time information is recorded.
(12f) MPT (MMT package table) is a table included in MMT signaling information (MMT-SI), and a list of assets (images, audio, subtitles, etc.) that are components of a content (program, etc.) package, It is the table which recorded package composition information, such as a position.

On the other hand, (2) MPEG-2TS format includes the following management information recording table.
(22a) PMT (program map table)
(22b) SIT (selection information table)

(22a) A PMT (Program Map Table) is a table included in PSI (Program Specific Information) defined in the MPEG-2TS format, and data management information (control information, attribute information, etc.) of data type (PID unit) Is a table in which is recorded.
The PMT (program map table) recording information mainly corresponds to the MPT (MMT package table) recording information included in the MMT signaling information (MMT-SI) in the MMT format.

(22b) SIT (Selection Information Table) is a table included in SI (Service Information) defined in the MPEG-2 TS format, and is used when data management information (Transport Stream) is generated (Partial TS (Transport Stream)). It is a table in which control information, attribute information, etc. are recorded.
The recording information of this SIT (selection information table) is mainly TLV-NIT included in TLV signaling information (TLV-SI) in the MMT format and MH-BIT, MH- included in MMT signaling information (MMT-SI). It corresponds to SDT, MH-EIT, MH-TOT, and these recorded information.

[5. Example of management information recording process for PMT (program map table) executed in format conversion process]
Next, an example of a management information recording process for a PMT (program map table) executed by the information processing apparatus in the process of converting the format from MMT format data to MPEG-2TS format data will be described.

As described with reference to FIG. 9, PMT (Program Map Table) recorded information included in PSI (Program Specific Information) defined in the MPEG-2TS format mainly includes MMT signaling information (MMT- Corresponds to the recording information of MPT (MMT package table) included in SI).

Therefore, when performing the format conversion process from the MMT format data to the MPEG-2TS format data, the information processing apparatus uses the management information recorded in the MPT (MMT package table) included in the MMT signaling information (MMT-SI) of the MMT format. This management information is read and recorded as PMT (program map table) management information included in the PSI defined in the MPEG-2 TS format.

FIG. 10 shows a data structure (syntax) of MPT (MMT package table) which is one of management information recording tables defined in the MMT format.
FIG. 10 shows the data structure, number of bits, and notation of data recorded in the MPT.
Note that “uimsbf” in the notation means “unsigned integer most significant bit first” notation.
“Bslbf” means “bit string, left bit means first (bit string, left bit first)”.

As described above, the MPT (MMT package table) is a table included in the MMT signaling information (MMT-SI), and is a list of assets (images, audio, subtitles, etc.) that are constituent elements of a content (program, etc.) package. And a table in which package configuration information such as position is recorded.

In the MPT, as shown in FIG. 10, the following data recording areas are set.
(1) MMT package identifier (MMT_package_id_byte)
(2) First descriptor loop (MPT descriptor loop) (MPT_descriptors_byte)
(3) Asset type (asset_type)
(4) Second descriptor loop (asset descriptor loop) (asset_descriptors_byte)

(1) The package identifier is recorded in the MMT package identifier. A package is, for example, one content (program), and the package is configured by various package configuration data such as images, sounds, and the like.
(2) In the first descriptor loop (MPT descriptor loop), management information applied to the package specified by the identifier recorded in (1) MMT package identifier is recorded.

(3) In the asset type, information indicating the types of data elements that constitute the package content (program), for example, image, audio, caption, application, etc., is recorded.
(4) In the second descriptor loop (asset descriptor loop), (3) management information applied to the asset specified by the asset type recorded in the asset type is recorded. That is, if the asset type is an image, management information corresponding to the image is recorded. If the asset type is voice, management information corresponding to voice is recorded.

Next, a data structure (syntax) of a PMT (program map table) which is one of management information recording tables defined in the MPEG-2TS format will be described with reference to FIG.

As described above, the PMT (program map table) is a table included in the PSI (Program Specific Information), and is a table in which data management information (control information, attribute information, etc.) of the data type (PID unit) is recorded. .

In the PMT, as shown in FIG. 11, the following data recording areas are set.
(1) Program identifier (Program_number)
(2) First descriptor loop (program descriptor loop) (descriptor)
(3) Stream type (stream_type)
(4) Second descriptor loop (ES descriptor loop) (descriptor)

(1) The program identifier is recorded in the program identifier. The program is, for example, one content (program), and the package is configured by various package configuration data such as images, sounds, and the like.
(2) In the first descriptor loop (program descriptor loop), (1) management information applied to the program specified by the identifier recorded in the program identifier is recorded.

(3) In the stream type, information indicating the types of data elements constituting the content (program) as a program, for example, image, audio, caption, application, and the like is recorded.
(4) In the second descriptor loop (ES descriptor loop), (3) management information applied to an ES (elementary stream) specified by the stream type recorded in the stream type is recorded. That is, if the stream type is an image, management information corresponding to the image is recorded. If the stream type is voice, management information corresponding to voice is recorded.

As described with reference to FIGS. 10 and 11,
MPT which is a management information recording table corresponding to the MMT format,
PMT which is a management information recording table corresponding to the MPEG-2TS format,
These tables have two hierarchized management information recording loops having substantially the same definition, and management information corresponding to the respective hierarchies is recorded in each loop.

That is, both the MMT format and the MPEG-2TS format are configured as the following two layer-specific descriptor loops, that is, tables having management information recording areas.
(1) First descriptor loop for recording management information in units of contents (programs) (2) Second descriptor loop for recording management information in units of data types

However, as described above, the descriptor defined in the MMT format and the descriptor in the MPEG-2TS format are not necessarily the same setting. That is, descriptors with the following settings are mixed.
(A) a descriptor with a definition that matches in both formats,
(B) descriptors with similar definitions in both formats,
(C) a descriptor defined only in one format;

Therefore, for example, when the information processing apparatus 30 shown in FIG. 7 converts the MMT format data into the MPEG-2TS format such as the partial TS format, different processes are performed according to the above settings (a) to (c). It is necessary to record the management information to be specified in the MPEG-2TS format data.

An example of management information recording processing executed by the information processing apparatus 30 for format conversion will be described with reference to FIG.
FIG. 12 shows the following two tables side by side.
(1) MMT format-defined MPT (MMT package table)
(2) MPEG-2TS format-defined PMT (program map table)
These are the tables described with reference to FIGS.

FIG. 12 is a diagram for explaining a processing method in which an information processing apparatus that performs format conversion from the MMT format to the MPEG-2TS format records management information in a PMT (program map table) defined by the MPEG-2TS format.
As described with reference to FIG. 9, most of the management information to be recorded in the PMT (program map table) included in the PSI defined in the MPEG-2TS format is the MMT signaling information (MMT-SI) in the MT format. It can be acquired from the recording information of the included MPT (MMT package table).

However, not all of them match, and it is necessary to select and apply various different methods to record management information in a PMT (program map table) defined in the MPEG-2TS format.
12 and 13 are diagrams for explaining the plurality of methods.
The systems P1 to P3 shown in FIG. 12 and FIG. 13 are management information recording methods such as descriptors for the recording area of the first descriptor (descriptor) of the PMT (program map table) defined in the MPEG-2TS format.
12 and 13 are recording systems for management information such as descriptors for the recording area of the second descriptor (descriptor) of the PMT (program map table) defined in the MPEG-2TS format. .

Each of these methods will be described with reference to FIG.
First, systems P1 to P3, which are management information recording systems such as descriptors for the recording area of the first descriptor loop (program descriptor loop) of the PMT (program map table) defined in the MPEG-2TS format, will be described.

(Management information recording method P1)
The scheme P1 is a processing scheme corresponding to the “MH-xxx descriptor” recorded in the MPT descriptor area which is the first descriptor in the MPT (MMT package table) in the MMT format.
The “MH-xxx descriptor” recorded in the MPT is management information related to MPEG-H data.
In the method P1, the “MH-xxx descriptor” recorded in the MPT descriptor area, which is the first descriptor of MPT, is described in the descriptor format defined in the MPEG-2TS format, specifically, for example, 8-bit description. Converted to a child format, modified as necessary according to recording or redistribution conditions, and converted to the first descriptor loop (1st loop) of the PMT (program map table) defined in the MPEG-2TS format. This is a method for recording a descriptor and management information corresponding to the descriptor.

(Management information recording method P2)
Method P2 defines a new MPEG-2TS format descriptor corresponding to the “MH-xxx descriptor” recorded in the MPT descriptor area which is the first descriptor of MPT, and further records it as necessary. Or, modification is made according to the redistribution conditions, and the converted descriptor and management information corresponding to the descriptor are added to the first descriptor loop (1st loop) of the PMT (program map table) defined in the MPEG-2TS format. Is a method for recording.

(Management information recording method P3)
The system P3 is a first descriptor of a PMT (program map table) stipulated in the MPEG-2TS format in accordance with an execution mode of a TS (transport stream) stipulated in the MPEG-2TS format stipulated in format conversion. In this method, a new descriptor to be recorded in the loop (1st loop) is generated, and the management information corresponding to the descriptor and the descriptor is recorded in the first descriptor loop (1st loop) of the PMT.

The recording destination of the management information in these systems P1 to P3 is the first descriptor loop (program descriptor loop) of the PMT (program map table) defined in the MPEG-2TS format. In the first descriptor loop (program descriptor loop), management information for each program (program etc.) is recorded.
Therefore, in the methods P1 and P2, the management information acquired from the management information storage table (MPT) in the MMT format is management information for each program.

Next, methods P4 to P6, which are management information recording methods such as descriptors for the recording area of the second descriptor loop (ES descriptor loop) of the PMT (program map table) defined in the MPEG-2TS format, will be described.

(Management information recording method P4)
In the method P4, the “MH-xxxx descriptor” recorded in the recording area of the asset descriptor (second descriptor) in the MMT format is used as a descriptor format defined in the MPEG-2TS format, specifically, for example, 8 Convert to bit descriptor format, modify according to recording or redistribution conditions as necessary, and to the second descriptor loop (2nd loop) of PMT (program map table) of MPEG-2TS format specification, This is a method for recording a descriptor after conversion and management information corresponding to the descriptor.

The stream type (stream_type) of the second descriptor loop (2nd loop) selected as the management information recording area in the PMT is a stream type (stream_type) equivalent to the asset type (asset_type) of the original MPT (MMT). It is necessary to set the position.

(Management information recording method P5)
Method P5 newly defines an MPEG-2TS format descriptor corresponding to the “MH-xxxx descriptor” recorded in the recording area of the asset descriptor (second descriptor) of the MMT format, and further In accordance with the recording or redistribution conditions, the second descriptor loop (2nd loop) of the MPEG-2TS format stipulated PMT (2nd loop) and the descriptor corresponding to the converted descriptor This is a method for recording management information.

(Management information recording method P6)
The system P6 is a second descriptor loop (2nd loop) of the PMT (program map table) according to the stream generated in the remultiplexing process of the TS (transport stream) stipulated in the MPEG-2TS format executed at the time of format conversion. Is generated, and a new descriptor and management information corresponding to the descriptor are recorded in the second descriptor loop (2nd loop) of the PMT corresponding to the stream type (Stream_type). .

The recording destination of the management information in these systems P4 to P6 is the second descriptor loop (ES descriptor loop) of the PMT (program map table) defined in the MPEG-2TS format. In the second descriptor loop (ES descriptor loop), management information in units of ES (elementary stream) is recorded.
Therefore, in the methods P4 to P5, the management information acquired from the management information storage table (MPT) in the MMT format is management information for each stream.

As described above, as a management information recording method for the PMT (program map table) defined in the MPEG-2TS format,
Methods P1 to P3 that are management information recording methods such as descriptors for the recording area of the first descriptor loop (program descriptor loop) of the PMT,
Methods P4 to P6, which are methods for recording management information such as descriptors in the recording area of the second descriptor loop (ES descriptor loop) of the PMT,
There are these recording methods.
An information processing apparatus that executes format conversion switches between these methods as needed, and performs processing for recording various management information in a PMT (program map table) defined in the MPEG-2TS format.

Next, with reference to FIG. 14 and the subsequent drawings, a plurality of recording methods described with reference to FIGS. 12 and 13, that is, recording areas of descriptor loops of the PMT (program map table) defined in the MPEG-2TS format. Specific examples of the recording methods P1 to P6 for management information such as descriptors will be described.

(Specific example of the management information recording method P1)
First, a specific example of the management information recording method P1 will be described with reference to FIG.
The method P1 is a descriptor format defined in the MPEG-2TS format by using “MH-xxxx descriptor” recorded in the MPT descriptor area, which is the first descriptor in MPT (MMT package table) in the MMT format. Specifically, for example, the first descriptor loop of PMT (Program Map Table) defined in the MPEG-2TS format is converted to an 8-bit descriptor format, modified according to recording or redistribution conditions as necessary. In (1st loop), a descriptor after conversion and management information corresponding to the descriptor are recorded.

FIG. 14 shows the following two data.
(1) MH-emergency information descriptor, which is MPT recording information stipulated in the MMT format (2) emergency information descriptor, which is PMT recording information stipulated in the MPEG-2TS format This is management information related to signal transmission / reception and output processing in accordance with the stipulated emergency warning signal, and is used when emergency warning broadcasting is performed.

An information processing apparatus that performs format conversion from the MMT format to the MPEG-2TS format has an MH-emergency information descriptor, which is MPT (MMT) recording information shown in FIG. The PMT (MPEG-2TS) recording information shown is converted into an emergency information descriptor and recorded.
Specifically, as shown in FIG. 14A, a descriptor tag (descriptor_tag) indicating an emergency information descriptor is changed from 16-bit data (0x8007) specified by MPT (MMT) to PMT (MPEG-2TS) specified. Is converted into 8-bit data (0xFC) and recorded.

Note that the descriptor tag (descriptor_tag) in the MMT format is defined as 16-bit data. On the other hand, the descriptor tag (descriptor_tag) in the MPEG-2TS format is defined as 8-bit data.
Therefore, the descriptor tag (descriptor_tag) in the MMT format cannot be copied as the descriptor tag (descriptor_tag) in the MPEG-2TS format as it is.

In the example shown in FIG. 14, a 16-bit tag descriptor indicating emergency information is defined in the MMT format, and an 8-bit tag descriptor indicating similar emergency information is defined in advance in the MPEG-2TS format. This is an example.
As described above, when there is a descriptor definition indicating the same management information in any format, the defined descriptor is used.

An information processing apparatus that performs format conversion is
First, the 16-bit tag descriptor recorded in the MPT descriptor area, which is the first descriptor in the MPT (MMT package table) of the MMT format, that is, 8 defined in the MPEG-2TS format similar to the emergency information descriptor. The bit tag emergency information descriptor is selected and recorded in the first descriptor loop (1st loop) of the PMT (program map table) defined in the MPEG-2TS format.

Further, if necessary, the management information corresponding to the emergency information descriptor recorded in the MPT descriptor area in the MPT (MMT package table) is read, and the read management information is converted into a PMT (program for MPEG-2TS format). Record in the first descriptor loop (1st loop) of the map table.

Next, another specific example of the management information recording method P1 will be described with reference to FIG.
FIG. 15 shows the following two data.
(1) Content copy control descriptor which is MPT recording information stipulated in MMT format (2) Digital copy control descriptor which is PMT recording information stipulated in MPEG-2TS format Note that content copy control descriptor and digital copy control A descriptor is a descriptor indicating information for controlling copy generation in a digital recording device. When digital recording is assumed to be performed, for example, a broadcast station or a copyright holder can send information on copying or maximum transmission. Used to communicate rate to digital recording equipment.

The information processing apparatus that performs format conversion from the MMT format to the MPEG-2TS format uses the content copy control descriptor, which is the MPT (MMT) recording information shown in FIG. 15 (1), as the PMT shown in FIG. 15 (2). Recording is performed as a digital copy control descriptor which is recording information of (MPEG-2TS).

Specifically, the processes shown in FIGS. 15A to 15C are executed. That is,
(A) The descriptor tag (descriptor_tag) recorded in MPT (MMT) is converted from 16 bits (0x8038) defined by MPT (MMT) into 8 bits (0xc1) defined by PMT (MPEG-2TS) and recorded.
(B) Regarding the digital recording control data (digital_recording_control_data), when the MPT (MMT) recording data is set to allow copying only for one generation (b10), when the format conversion data is recorded (copied) on the medium, the copy is prohibited. Modify and record settings (b11).
(C) For the component tag (component_tag), the tag value is converted from 16 bits (MMT specification) to 8 bits (MPEG-2TS specification) according to the replacement content of the stream identifier and recorded.

When the management information recorded in the management information recording table (MPT) stipulated in the MMT format is management information including copy control information that needs to be corrected according to the processing status, the information processing apparatus corrects the management information. Then, the corrected management information is recorded in the MPEG-2TS format-defined management information recording table (MPT) as MPEG-2TS format-defined management information.

As described above, in the method P1, the “MH-xxx descriptor” recorded in the MPT descriptor area which is the first descriptor in the MPT (MMT package table) in the MMT format is defined in the MPEG-2TS format. Descriptor format, specifically, for example, 8-bit tag descriptor format, modified according to recording or redistribution conditions as necessary, and MPEG-2TS format-defined PMT (Program Map Table) In the first descriptor loop (1st loop), the converted descriptor and management information corresponding to the descriptor are recorded.

(Specific example of the management information recording method P2)
Next, a specific example of the management information recording method P2 will be described with reference to FIG.
Method P2 defines a new MPEG-2TS format descriptor corresponding to the “MH-xxx descriptor” recorded in the MPT descriptor area which is the first descriptor of MPT, and further records it as necessary. Or, modification is made according to the redistribution conditions, and the converted descriptor and management information corresponding to the descriptor are added to the first descriptor loop (1st loop) of the PMT (program map table) defined in the MPEG-2TS format. Is a method for recording.

This method P2 is a processing method of a descriptor tag (descriptor_tag) defined only in MPT (MMT). That is, this is a management information recording method for descriptor tags (descriptor_tag) that are defined only in MPT (MMT) and not defined in PMT (MPEG-2TS).

FIG. 16 shows the following two data.
(1) Management information such as emergency news descriptors which are MPT recording information stipulated in the MMT format (2) Management information such as emergency news descriptors newly defined as PMT recording information stipulated in the MPEG-2TS format Emergency news description The child is management information that defines information necessary for transmission / reception and output processing of emergency news bulletins such as emergency earthquake bulletins, extraordinary news, and bulletin supermarkets.

The emergency news descriptor is defined in the MMT format-defined MPT, and is set to record management information corresponding to emergency news.
However, the PMT defined in the MPEG-2TS format does not have this emergency news descriptor definition and is not set to record management information corresponding to emergency news.
In such a case, the information processing apparatus that performs format conversion newly generates a new PMT (MPEG-2TS) -defined descriptor indicating management information similar to the MPT-defined descriptor, and generates a PMT (program map table). ) In the first descriptor loop (1st loop).

Specifically, as shown in FIG. 16A, a new PMT (MPEG-2TS) -defined 8-bit descriptor tag corresponding to an MPT-specified 16-bit descriptor tag (0x8040) indicating an emergency news descriptor. (For example, any useable free code 0x80 to 0xBF is used) is newly generated and recorded, and management information corresponding to emergency news is acquired from the MPT and recorded in the PMT.

In the MPEG-2TS format, a plurality of 8-bit data is defined in advance as descriptor codes indicating various management information, but codes in the range of 0x80 to 0xBF are free management information as free codes. It is a setting that can be used in association with each other.
The information processing apparatus that executes the format conversion selects one code from codes (8-bit data) in the range of 0x80 to 0xBF, and sets the selected code as a new PMT (management information similar to the MPT-defined descriptor). MPEG-2TS) can be set as a standard descriptor.

(Specific example of management information recording method P3)
Next, a specific example of the management information recording method P3 will be described with reference to FIGS.
The system P3 is a first descriptor of a PMT (program map table) stipulated in the MPEG-2TS format in accordance with an execution mode of a TS (transport stream) stipulated in the MPEG-2TS format stipulated in format conversion. In this method, a new descriptor to be recorded in the loop (1st loop) is generated, and the management information corresponding to the descriptor and the descriptor is recorded in the first descriptor loop (1st loop) of the PMT.

When MMT format data is converted to MPEG-2TS format data and transferred to an information recording medium (medium) or retransmitted, for example, the encoding of data such as images and sounds included in MMT format data It is possible to generate TS stream data (remultiplexed data) constituting MPEG-2 TS format data by changing the conversion mode.
It is also possible to generate TS stream data (remultiplexed data) constituting MPEG-2 TS format data as it is without changing the coding mode of data such as images and sounds included in MMT format data. .

An information processing apparatus that converts MMT format data into MPEG-2TS format data and performs transfer processing such as recording on an information recording medium (medium) or re-transmission as described above includes various encoded data as components. MPEG-2TS format data can be generated.
The information processing apparatus needs to record the encoding processing mode such as image and sound executed at the time of format conversion as management information in each management information recording table (PMT etc.) defined in the MPEG-2TS format.

It should be noted that the information processing apparatus that performs the conversion processing can determine the encoding processing mode for images, sounds, and the like that is executed at the time of format conversion, and is not recorded in the management information recording table (MPT or the like) in the MMT format data. .
Therefore, the information processing apparatus newly generates management information indicating an encoding processing mode such as an image or sound executed at the time of format conversion, and a new description indicating that the generated management information is encoding processing mode information. Along with the child, a process of recording in a management information recording table (PMT or the like) defined in the MPEG-2TS format is executed.

FIG. 17 shows an example of an encoding process mode such as image and sound that can be executed at the time of format conversion, a specific example of descriptors and management information to be recorded in a management information recording table (PMT / SIT) defined in the MPEG-2TS format. It is a figure which shows the correspondence of these.

As shown in item (A) of FIG.
(A) TS (Transport Stream) Remultiplexing Processing Conditions This item (A) is an encoding processing mode for images, audio, etc. that can be executed at the time of format conversion, and shows the following three examples.
(1) TS remultiplexing process without conversion (2) Image conversion TS remultiplexing recording process (3) Video / audio conversion TS remultiplexing process

(1) The TS remultiplexing process without conversion separates the image, audio, etc. from the multiplexed stream data such as image, audio, etc. included in the MMT format data, and does not change the encoding mode of the image, audio, This is a process for generating a multiplexed TS stream that stores images, sounds, and the like constituting the MPEG-2TS format in the same encoding mode.
The mode name should be called MPEG-2TS for ISDB-S3 mode.

(2) The image conversion TS remultiplex recording process separates the image, audio, etc. from the multiplexed stream data such as image, audio, etc. included in the MMT format data, changes the encoding mode of only the image, This is a process for generating a multiplexed TS stream storing images, sounds, and the like constituting the MPEG-2TS format without changing the encoding mode.
The mode name should be called MPEG-2TS for ISDB-S3 Transcode mode.

(3) The image / audio conversion TS remultiplexing process separates the image, audio, etc. from the multiplexed stream data such as image, audio, etc. included in the MMT format data, changes the image coding mode, and further performs audio Is also a process for generating a multiplexed TS stream storing images, sounds, and the like constituting the MPEG-2TS format.
The mode name is called HDNV compatible TS mode.

Items (B) to (E) in FIG. 17 describe the following information corresponding to these three types of conversion processing modes.
(B) Image stream (Video ES) conversion processing mode (C) Audio stream (Audio ES) conversion processing mode (D) PMT (program map table) descriptor setting example (D1) PMT first descriptor Example of setting of descriptor of loop (1st loop) (D2) Example of setting of descriptor of MT second descriptor loop (2nd loop) (E) Example of setting of descriptor etc. for SIT (selection information table) (E1 ) SIT first descriptor loop (1st loop) descriptor setting example

For example, (1) an information processing apparatus that performs format conversion with the setting of TS remultiplexing processing without conversion performs the following processing.
(B) The conversion process mode of the image stream (Video ES) is a mode in which the TS multiplexing process is executed without converting the image (Video ES) in the MMT.
(C) The audio stream (Audio ES) conversion processing mode is a mode in which the TS multiplexing processing is executed without converting the audio (Audio ES) in the MMT.

(D1) The setting of the descriptor of the PMT first descriptor loop (1st loop) is set to record management information such as a descriptor indicating that the TS is a TS by direct conversion from the MMT.
(D2) The setting of the descriptor of the MT second descriptor loop (2nd loop) is management information such as a descriptor indicating that the image and sound (VideoES, AudioES) are created by direct conversion from the MMT. Set to record.
(E1) The setting of the descriptor of the SIT first descriptor loop (1st loop) is set to record management information such as a partial transport stream descriptor.
For example, the management information is set to record information necessary for recording and transferring the partial TS.

Further, (2) the information processing apparatus that performs format conversion with the setting of the image conversion TS re-multiplexing process performs the following process.
(B) The image stream (Video ES) conversion process is performed by converting an image (Video ES (HEVC 4K / 8K, etc.)) in MMT into 2Kor4K, converting (transcoding) it into HEVCor MPEG-4 AVC, and translating it. This is a mode in which multiplexing processing is executed.
(C) The audio stream (Audio ES) conversion processing mode is a mode in which TS multiplexing processing is performed without converting the audio (Audio ES) in the MMT.

(D1) The setting of the descriptor of the PMT first descriptor loop (1st loop) is set to record management information such as a descriptor indicating that the TS is a TS by direct conversion from the MMT.
(D2) The setting of the descriptor of the MT second descriptor loop (2nd loop) is set to record management information such as a descriptor indicating that the TS is a TS by image conversion from the MMT.

For example, the setting includes the following descriptors.
VideoES: HDMV_video_registration_descriptor,
Transcode_mode_registration_descriptor
“HDMV_video_registration_descriptor” is a descriptor indicating that the TS includes an MPEG-4 AVC video stream.
“Transcode_mode_registration_descriptor” is a descriptor indicating that the ES has been converted (transcoded).

(E1) The setting of the descriptor of the SIT first descriptor loop (1st loop) is set to record management information such as a partial transport stream descriptor.
For example, the management information is set to record information necessary for recording and transferring the partial TS.

Further, (3) the information processing apparatus that performs format conversion with the setting of the image / audio conversion TS remultiplexing process performs the following process.
(B) The image stream (Video ES) conversion process is performed by converting an image (Video ES (HEVC 4K / 8K, etc.)) in the MMT into a size of 2K, and converting (transcoding) it into MPEG-4 AVC. This is a mode in which multiplexing processing is executed.
(C) The audio stream (Audio ES) conversion processing mode converts audio (Audio ES (MPEG-4 AAC 22.2ch, etc.)) in MMT into 2ch or 5.1ch and converts it into AC-3 (Trans Code) to execute the TS multiplexing process.

(D1) The setting of the PMT first descriptor loop (1st loop) descriptor and the like is set to record management information such as the HDMV descriptor.
The specific descriptor is, for example,
HDMV_registration_descriptor
It is.
Note that “HDMV_registration_descriptor” is a descriptor indicating that the TS is HDMV-TS (compatible with BD-ROM).

(D2) The setting of the MT second descriptor loop (2nd loop) descriptor and the like is set to generate an HDMV descriptor and record it together with the management information.
The specific descriptor is, for example,
VideoES: HDMV_video_registration_descriptor
AudioES: AC-3_registration_descriptor
It is.
“HDMV_video_registration_descriptor” is a descriptor indicating that the TS includes an MPEG-4 AVC video stream.
“AC-3_registration_descriptor” is a descriptor indicating that the HDMV-TS includes an AC-3 audio stream.

In this way, the information processing device
(A) TS (transport stream) re-multiplexing processing conditions That is, the encoding processing mode of images, audio, etc. that can be executed at the time of format conversion is
(1) TS remultiplexing process without conversion (2) Image conversion TS remultiplexing recording process (3) Video / audio conversion TS remultiplexing process Depending on which of the above (1) to (3),
Processing for the images and sounds shown in FIGS. 17B to 17C is performed.
Recording processing of management information such as descriptors for PMT and SIT shown in FIGS. 17D to 17E is performed.

FIG. 18 is a table shown in FIG.
(3) When format conversion is executed with the setting of the video / audio conversion TS re-multiplexing process,
(D1) shows an example of setting descriptors of the PMT first descriptor loop (1st loop).
That is, an example of recording management information such as an HDMV descriptor,
HDMV_registration_descriptor
It is a figure which shows the specific example of this descriptor.
As described above, “HDMV_registration_descriptor” is a descriptor indicating that the TS is HDMV-TS (BD-ROM compatible).

As shown in FIG. 18 (a), a stream such as an image (Video) or audio (Audio) in MMT format data is format-converted (transcoded) to generate remultiplexed data of an MPEG-2TS stream. When recording or redistributing to media, it is necessary to record information (format information, frame rate information, etc.) relating to a newly generated MPEG-2TS compatible stream.
Since these pieces of information are not recorded as management information in each table (MPT etc.) in the MMT format, the apparatus that has performed the format conversion needs to record it in the management information recording table (PMT etc.) of the MPEG-2TS. Create and record new descriptors and management information.

* The descriptor tag (descriptor_tag) is set to 8-bit data (0x05). For example, a code that matches the specified code of ISO / IEC 1318-1 is recorded.
* Descriptor length (descriptor_length) is set to 4 bits.
* The format identifier (format_identifier) is set to 0x48 44 4D 56. This is an example in which a code corresponding to an ASCII code meaning HDMV is recorded.

Next, specific examples of methods P4 to P6, which are management information recording methods such as descriptors for the recording area of the second descriptor loop (ES descriptor loop) of the PMT (program map table) defined in the MPEG-2TS format. explain.

(Specific example of management information recording method P4)
A specific example of the management information recording method P4 will be described with reference to FIG.
In the method P4, the “MH-xxxx descriptor” recorded in the recording area of the asset descriptor (second descriptor) in the MMT format is used as a descriptor format defined in the MPEG-2TS format, specifically, for example, 8 Converted to bit tag descriptor format, modified according to recording or redistribution conditions as necessary, and added to the second descriptor loop (2nd loop) of the PMT (program map table) defined in the MPEG-2TS format. In this method, the descriptor after conversion and the management information corresponding to the descriptor are recorded.

As described above, the stream type (stream_type) of the second descriptor loop (2nd loop) selected as the management information recording area in the PMT is a stream equivalent to the asset type (asset_type) of the original MPT (MMT). It is necessary to set the position of type (stream_type).

FIG. 19 shows the following two data.
(1) MH-stream identification descriptor which is MPT recording information stipulated in the MMT format (2) Stream identification descriptor which is PMT recording information stipulated in the MPEG-2TS format Note that the stream identification descriptor constitutes content Specific specifications of the stream, for example, a label (stream identifier) for referring to component information such as the number of pixels of the image, aspect ratio, frame rate, and the like are recorded.

The information processing apparatus that performs format conversion from the MMT format to the MPEG-2TS format has the MH-stream identification descriptor, which is MPT (MMT) recording information shown in FIG. 19 (1), shown in FIG. 19 (2). The PMT (MPEG-2TS) recording information shown is converted into a stream identification descriptor and recorded.
Specifically, as shown in FIG. 19A, a descriptor tag (descriptor_tag) indicating a stream identification descriptor is changed from 16-bit data (0x8011) specified by MPT (MMT) to PMT (MPEG-2TS) specified. The data is converted into 8-bit data (0x52) and recorded.

As described above, the descriptor tag (descriptor_tag) in the MMT format is defined as 16-bit data, and the descriptor tag (descriptor_tag) in the MPEG-2TS format is defined as 8-bit data.
The example shown in FIG. 19 is an example in which a 16-bit tag stream identification descriptor is defined in the MMT format, and a similar 8-bit tag stream identification descriptor is defined in advance in the MPEG-2TS format. .
As described above, when there is a descriptor definition indicating the same management information in any format, the defined descriptor is used.

An information processing apparatus that performs format conversion is
First, the 16-bit tag descriptor recorded in the asset descriptor area, which is the second descriptor in MPT (MMT package table) in the MMT format, that is, 8 defined in the MPEG-2TS format similar to the stream identification descriptor. The bit tag stream identification descriptor is selected and recorded in the second descriptor loop (2nd loop) of the PMT (program map table) defined in the MPEG-2TS format.

Further, if necessary, the management information corresponding to the stream identification descriptor recorded in the MPT descriptor area in the MPT (MMT package table) is read, and the read management information is converted into a PMT (program for MPEG-2TS format). Record in the second descriptor loop (2nd loop) of the map table.

In the process of recording management information such as descriptors, as described above, the stream type (stream_type) of the second descriptor loop (2nd loop) of the PMT (program map table) defined in the MPEG-2TS format is the original. It is necessary to confirm that it is the same type (stream_type) as the asset type (asset_type) of MPT (MMT package table) in the MMT format.

(Specific example of management information recording method P5)
Next, a specific example of the management information recording method P5 will be described with reference to FIG.
Method P5 newly defines an MPEG-2TS format descriptor corresponding to the “MH-xxxx descriptor” recorded in the recording area of the asset descriptor (second descriptor) of the MMT format, and further In accordance with the recording or redistribution conditions, the second descriptor loop (2nd loop) of the MPEG-2TS format stipulated PMT (2nd loop) and the descriptor corresponding to the converted descriptor This is a method for recording management information.

FIG. 20 shows the following two data.
(1) Management information such as video component descriptors which are MPT recording information stipulated in the MMT format (2) Management information such as video component descriptors newly defined as PMT recording information stipulated in the MPEG-2TS format Video component description The child is management information that defines parameters and explanations related to the video component.

The video component descriptor is defined in the MPT defined by the MMT format, and is set to record management information corresponding to the video component.
However, the PMT defined in the MPEG-2TS format does not have the definition of the video component descriptor and is not set to record management information corresponding to the video component.
In such a case, the information processing apparatus that performs format conversion newly generates a new PMT (MPEG-2TS) -defined descriptor indicating management information similar to the MPT-defined descriptor, and generates a PMT (program map table). ) In the second descriptor loop (2nd loop).

Specifically, as shown in FIG. 20A, a new PMT (MPEG-2TS) -defined 8-bit descriptor tag corresponding to an MPT-specified 16-bit descriptor tag (0x8010) indicating a video component descriptor. (For example, any useable free code 0x80 to 0xBF is used) is newly generated and recorded, and management information corresponding to the video component is acquired from the MPT and recorded in the PMT.

In the MPEG-2TS format, a plurality of 8-bit data is defined in advance as descriptor tag codes indicating various management information, but codes in the range of 0x80 to 0xBF are free management information as free codes. Can be used in association with each other.
The information processing apparatus that executes the format conversion selects one code from codes (8-bit data) in the range of 0x80 to 0xBF, and sets the selected code as a new PMT (management information similar to the MPT-defined descriptor). (MPEG-2TS) can be set as a tag of a standard descriptor.

In the processing of this method P5, as in the above-described method P4, in the recording processing of management information such as descriptors, the second descriptor loop (2nd loop) of the PMT (program map table) defined in the MPEG-2TS format is used. It is necessary to confirm that the stream type (stream_type) of () is the same type (stream_type) as the asset type (asset_type) of MPT (MMT package table) of the original MMT format.

(Specific example of management information recording method P6)
Next, a specific example of the management information recording method P6 will be described with reference to FIG.
The system P6 is a second descriptor loop (2nd loop) of the PMT (program map table) according to the stream generated in the remultiplexing process of the TS (transport stream) stipulated in the MPEG-2TS format executed at the time of format conversion. Is generated, and a new descriptor and management information corresponding to the descriptor are recorded in the second descriptor loop (2nd loop) of the PMT corresponding to the stream type (Stream_type). .

The process of the method P6 is the same as the process of the method P3 described with reference to FIGS. 17 and 18 as the management information recording method of the first loop. In other words, the encoding processing mode of images, sounds, etc. executed at the time of format conversion for converting MMT format data to MPEG-2TS format data is recorded as management information in each management information recording table (PMT etc.) defined in the MPEG-2TS format. It is processing to do.

FIG. 21 is an example of “(D2) MT second descriptor loop (2nd loop) descriptor setting” in FIG. 17 described above, for example,
17 (2) Image conversion TS remultiplex recording process (3) Image audio conversion TS remultiplex process The management information including the image correspondence descriptor when format conversion is executed with any of these settings. It is a recording example.
The data shown in FIG. 21 is recorded in the second descriptor loop (2nd loop) of the PMT (program map table).

As shown in FIG. 21, detailed data such as a video format, a frame rate, and an aspect ratio is recorded in this data.
These pieces of information are information relating to images included in the MPEG-2TS format data after format conversion.
These pieces of information are grasped by the information processing apparatus that has performed the conversion from the MMT format data to the MPEG-2TS format data, and the information shown in FIG. Record in the second descriptor loop (2nd loop) of (program map table).
The example shown in FIG. 21 is an example of an image, but information corresponding to the format conversion mode is recorded for audio, subtitles, and the like.

In the process of this method P6, whether the stream type (stream_type) of the second descriptor loop (2nd loop) of the PMT (program map table) defined in the MPEG-2TS format is an image, an audio, or a subtitle. It is necessary to confirm and individually record management information of an image, audio, or subtitle that matches the stream type.

[6. Example of management information recording process for SIT (selection information table) executed during format conversion process]

Next, an example of management information recording processing for SIT (selection information table) executed by the information processing apparatus in the format conversion processing from MMT format data to MPEG-2TS format data will be described.

As described above with reference to FIG. 9, the recording information of SIT (Selection Information Table) included in SI (Service Information) defined in the MPEG-2TS format is mainly TLV signaling information in MMT format ( It corresponds to TLV-NIT included in TLV-SI), MH-BIT, MH-SDT, MH-EIT, and MH-TOT included in MMT signaling information (MMT-SI).

Therefore, in the format conversion process from the MMT format data to the MPEG-2TS format data, the information processing apparatus performs the TLV-NIT included in the MLV format TLV signaling information (TLV-SI) and the MMT signaling information (MMT-SI). MH-BIT, MH-SDT, MH-EIT, MH-TOT, and management information recorded in these are read, and this management information is included in the SIT (Selection Information Table) included in the SI defined in the MPEG-2TS format. ) Management information.

Next, the data structure (syntax) of SIT (selection information table) which is one of management information recording tables defined in the MPEG-2TS format will be described with reference to FIG.

As described above, SIT (selection information table) is a table included in SI (Service Information), and management information (control information, attribute information, etc.) corresponding to partial TS (transport stream) is classified into data type (PID unit). ) Is recorded as information.

In the SIT, as shown in FIG. 22, the following data recording areas are set.
(1) First descriptor loop (transmission information descriptor loop) (descriptor)
(2) Second descriptor loop (service information descriptor loop) (descriptor)

(1) In the first descriptor loop (transmission information descriptor loop), management information applied to individual transmission processing unit data is recorded.
(2) In the second descriptor loop (service information descriptor loop), management information for each service (program etc.) unit is recorded.

The information recorded in the SIT (Selection Information Table) defined in the MPEG-2TS format is mainly included in the TLV-NIT included in the TLV signaling information (TLV-SI) and the MMT signaling information (MMT-SI) in the MMT format. MH-BIT, MH-SDT, MH-EIT, and MH-TOT correspond to these recorded information. Therefore, in the conversion process from the MMT format to the MPEG-2TS format, the information processing apparatus receives management information from each table (TLV-NIT, MH-BIT, MH-SDT, MH-EIT, MH-TOT) of the MMT format. This management information is read and recorded as SIT (selection information table) management information defined in the MPEG-2TS format.

An example of the management information recording process executed by the information processing apparatus 30 during format conversion will be described with reference to FIG.
FIG. 23 shows the following table.
(1) MMT format specification table (1a) TLV-NIT (network information table)
(1b) MH-BIT (Broadcaster information table)
(1c) MH-SDT (service description table)
(1d) MH-EIT (event information table)
(1e) MH-TOT (Time Offset Table)
(2) MPEG-2TS format-defined SIT (selection information table)

Methods S1 to S3 shown in FIG. 23 are recording methods of management information such as descriptors for the recording area of the first descriptor (descriptor) of the SIT (selection information table) defined in the MPEG-2TS format.
Further, methods S4 to S7 shown in FIG. 23 are recording methods of management information such as descriptors for the recording area of the second descriptor (descriptor) of the SIT (selection information table) defined in the MPEG-2TS format.

Each of these methods will be described with reference to FIG.
First, systems S1 to S3, which are management information recording systems such as descriptors for the recording area of the first descriptor loop (transmission information descriptor loop) of the SIT (selection information table) defined in the MPEG-2TS format, will be described.

(Management information recording method S1)
The system S1 reflects the management information recorded in the TLV-NIT (network information table) included in the TLV signaling information (TLV-SI) in the MMT format in the descriptor contents of the MPEG-2TS definition, This is a method of recording descriptors and management information corresponding to descriptors in a transmission information descriptor loop which is a first descriptor loop (1st loop) of a prescribed SIT (selection information table).

As described above with reference to FIG. 9, the TLV-NIT (network information table) is a table included in the TLV signaling information (TLV-SI), and records the combination of TLV streams and tuning information. It is a table.
The information processing apparatus that executes format conversion reflects the management information recorded in the TLV-NIT (network information table) in the descriptor contents of the MPEG-2TS definition, and the SIT (selection information table in the MPEG-2TS format) ) In the transmission information descriptor loop which is the first descriptor loop (1st loop).

(Management information recording method S2)
System S2 is a management information storage table included in MMT signaling information (MMT-SI), MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH -TOT (time offset table), the management information recorded in each of these tables is reflected in the descriptor contents of the MPEG-2TS definition, and the first descriptor loop of the SIT (selection information table) stipulated in the MPEG-2TS format In this method, a descriptor and management information corresponding to the descriptor are recorded in (1st loop).

As described above with reference to FIG. 9,
The MH-BIT (Broadcaster Information Table) is a table included in the MMT signaling information (MMT-SI), and is a table in which information on broadcasters on the network is recorded.
The MH-SDT (service description table) is a table included in the MMT signaling information (MMT-SI), and is a table in which channel related information such as a channel name and a broadcaster name is recorded.
The MH-EIT (event information table) is a table included in the MMT signaling information (MMT-SI), and is a table in which content-related information such as the name of the content (program, etc.), the broadcast date and time, and the description of the content is recorded. .
The MH-TOT (time offset table) is a table included in the MMT signaling information (MMT-SI), and is a table in which date-related information such as the current date and time information is recorded.

The information processing apparatus that executes format conversion reflects the management information recorded in each of these tables in the descriptor contents of the MPEG-2TS definition, and the first description of the SIT (selection information table) defined in the MPEG-2TS format. It records in the transmission information descriptor loop which is a child loop (1st loop).

(Management information recording method S3)
The system S3 is a first descriptor of the SIT (selection information table) stipulated in the MPEG-2 TS format in accordance with the execution mode of the remultiplexing process of the TS (transport stream) stipulated in the MPEG-2 TS format executed at the time of format conversion. In this method, a new descriptor to be recorded in the loop (1st loop) is generated, and the descriptor and management information corresponding to the descriptor are recorded in the first descriptor loop (1st loop) of the SIT.

Note that the recording destination of the management information in these systems S1 to S3 is the first descriptor loop (transmission information descriptor loop) of the SIT (selection information table) defined in the MPEG-2TS format. In the first descriptor loop (transmission information descriptor loop), management information in units of transmission information is recorded.
Therefore, in the methods S1 and S2, the management information acquired from the management information storage table in the MMT format is management information in units of transmission information.

Next, methods S4 to S7, which are management information recording methods such as descriptors for the recording area of the second descriptor loop (service information descriptor loop) of the SIT (selection information table) defined in the MPEG-2TS format, will be described. .

(Management information recording method S4)
Method S4 is a management information storage table included in MMT signaling information (MMT-SI), MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH -TOT (time offset table), the management information recorded in each of these tables is reflected in the descriptor contents of the MPEG-2TS definition, and the second descriptor loop of the SIT (selection information table) defined in the MPEG-2TS format This is a method of recording a descriptor and management information corresponding to the descriptor in (2nd loop).

The information processing apparatus that performs format conversion reflects the management information recorded in the management information storage table included in the MMT signaling information (MMT-SI) in the descriptor contents of the MPEG-2TS definition, In the service information descriptor loop which is the second descriptor loop (2nd loop) of the SIT (selection information table).

Note that the second descriptor loop (2nd loop) selected as the management information recording area in the SIT is set in a loop for each service (program etc.) and is configured to record information for each service. Therefore, the information processing apparatus that executes the management information recording process needs to record the management information to be recorded and the service in association with each other.

(Management information recording method S5)
System S5 is a management information storage table included in MMT signaling information (MMT-SI), MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH -TOT (time offset table), the “MH-xxxx descriptor” recorded in each of these tables is converted into an MPEG-2TS definition descriptor, and the SIT (selection information table) of the MPEG-2TS format specification In this method, a descriptor and management information corresponding to the descriptor are recorded in a two-descriptor loop (2nd loop).

An information processing apparatus that performs format conversion defines management information including “MH-xxx descriptor” recorded in a management information storage table included in MMT signaling information (MMT-SI) in MPEG-2TS. It is converted into a descriptor and recorded in a service information descriptor loop which is a second descriptor loop (2nd loop) of the SIT (Selection Information Table) defined in the MPEG-2TS format.

(Management information recording method S6)
Method S6 is a management information storage table included in MMT signaling information (MMT-SI), MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH -A TOT (Time Offset Table), a new MPEG-2TS definition descriptor corresponding to the "MH-xxxx descriptor" recorded in each of these tables, and a SIT (Selection Information Table) defined by the MPEG-2TS format ) In the second descriptor loop (2nd loop), and the management information corresponding to the descriptor is recorded.

In this example, there is no MPEG-2 TS format-specific descriptor corresponding to the MMT format-specific descriptor.
The information processing apparatus that executes format conversion generates a new MPEG-2TS definition descriptor corresponding to the descriptor recorded in the management information storage table included in the MMT signaling information (MMT-SI), and generates the MPEG-2TS format Recording is performed in a service information descriptor loop which is a second descriptor loop (2nd loop) of a prescribed SIT (selection information table).

(Management information recording method S7)
The system S7 is a second descriptor loop (2nd loop) of the SIT (selection information table) according to the stream generated in the remultiplexing process of the TS (transport stream) stipulated in the MPEG-2 TS format executed at the time of format conversion. Is generated, and a new descriptor and management information corresponding to the descriptor are recorded in the second descriptor loop (2nd loop) of the SIT corresponding to the stream type (Stream_type). .

Note that the recording destination of the management information in these methods S4 to S7 is the second descriptor loop (service information descriptor loop) of the SIT (selection information table) defined in the MPEG-2TS format. Management information for each service information unit is recorded in the second descriptor loop (service information descriptor loop).
Therefore, in the methods S4 to S6, the management information acquired from the management information storage table in the MMT format is management information in service information units.

As described above, as a management information recording method for SIT (selection information table) defined in the MPEG-2TS format,
Systems S1 to S3 that are management information recording methods such as descriptors for the recording area of the first descriptor loop (transmission information descriptor loop) of the SIT;
Methods S4 to S7, which are methods for recording management information such as descriptors in the recording area of the second descriptor loop (service information descriptor loop) of SIT,
There are these recording methods.
An information processing apparatus that executes format conversion switches between these methods as needed, and performs processing for recording various management information in an SIT (selection information table) defined in the MPEG-2TS format.

Next, referring to FIG. 25 and subsequent figures, the recording areas described in FIG. 23 and FIG. 24, that is, the recording areas of the descriptor loops of the SIT (selection information table) defined in the MPEG-2TS format. Specific examples of the recording methods S1 to S7 for management information such as descriptors will be described.

(Specific example of the management information recording method S1)
First, a specific example of the management information recording method S1 will be described with reference to FIG.
The system S1 reflects the management information recorded in the TLV-NIT (network information table) included in the TLV signaling information (TLV-SI) in the MMT format in the descriptor contents of the MPEG-2TS definition, This is a method of recording descriptors and management information corresponding to descriptors in a transmission information descriptor loop which is a first descriptor loop (1st loop) of a prescribed SIT (selection information table).

FIG. 25 shows the following two data.
(1) MLV format-defined TLV-NIT (network information table)
(2) Network identification descriptor which is SIT recording information stipulated in the MPEG-2TS format

The TLV-NIT (network information table) is a table included in the TLV signaling information (TLV-SI) of the MMT format data, and is a table in which the combination of TLV streams and tuning information is recorded.
Here, a network identifier (network_id) necessary for receiving a service (program or the like) is recorded.

An information processing apparatus that performs format conversion from the MMT format to the MPEG-2TS format is a network identifier (network_id) 16-bit data recorded in a TLV-NIT (network information table) defined in the MMT format shown in FIG. Is directly recorded as 16-bit network identification descriptor (network_id) stipulated in SIT (MPEG-2TS) shown in FIG. 25 (2).

When the management information recorded in the management information recording table (SIT) defined in the MMT format is management information including network identification information that needs to be corrected according to the processing status, the information processing apparatus corrects the management information. Then, the corrected management information is recorded in the MPEG-2TS format-defined management information recording table (SIT) as MPEG-2TS format-defined management information.

(Specific example of the management information recording method S2)
Next, a specific example of the management information recording method S2 will be described with reference to FIG.
System S2 is a management information storage table included in MMT signaling information (MMT-SI), MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH -TOT (time offset table), the management information recorded in each of these tables is reflected in the descriptor contents of the MPEG-2TS definition, and the first descriptor loop of the SIT (selection information table) stipulated in the MPEG-2TS format In this method, a descriptor and management information corresponding to the descriptor are recorded in (1st loop).

This method S2 is a processing method of a descriptor tag (descriptor_tag) defined only in MMT-SI. That is, this is a management information recording method for descriptor tags (descriptor_tag) that are defined only in MMT-SI and not defined in SIT (MPEG-2TS).

FIG. 26 shows the following two data.
(1) Recording information of MH-TOT (time offset table) stipulated in MMT format (2) Partial TS time descriptor which is SIT recording information stipulated in MPEG-2TS format

The MH-TOT (time offset table) is a table included in the MMT signaling information (MMT-SI), and is a table in which date / time related information such as current date and time information is recorded.
In a partial TS time descriptor (Partial TS time descriptor), which is SIT recording information stipulated in the MPEG-2TS format, event time information and transmission time information are described.

These two pieces of data include common management information, and the information processing apparatus that executes format conversion uses the recording information of the MH-TOT (time offset table) included in the MMT signaling information (MMT-SI). -Record information of a partial TS time descriptor (Partial TS time descriptor), which is SIT record information of TS format stipulation, is generated.

Specifically, for example, as shown in FIG. 26 (a), 40-bit data (JST_time) field recorded in MH-TOT in the MMT format (the current date in Japan Standard Time (JST) and Modified Julius (MJD)) (Including the current time) is recorded as 40-bit data in the [JST_time] field of the partial TS time descriptor of the SIT defined in MPEG-2TS.

(Specific example of the management information recording method S3)
Next, a specific example of the management information recording method S3 will be described with reference to FIG.
The system S3 is a first descriptor of the SIT (selection information table) stipulated in the MPEG-2 TS format in accordance with the execution mode of the remultiplexing process of the TS (transport stream) stipulated in the MPEG-2 TS format executed at the time of format conversion. In this method, a new descriptor to be recorded in the loop (1st loop) is generated, and the descriptor and management information corresponding to the descriptor are recorded in the first descriptor loop (1st loop) of the SIT.

An information processing apparatus that converts MMT format data into MPEG-2TS format data and performs transfer processing such as recording on an information recording medium (medium) or re-transmission as described above includes various encoded data as components. MPEG-2TS format data can be generated.
The information processing apparatus needs to record the encoding processing mode such as image and sound executed at the time of format conversion as management information in each management information recording table (SIT or the like) defined in the MPEG-2TS format.

It should be noted that the information processing apparatus that performs the conversion processing can determine the encoding processing mode for images, sounds, and the like that is executed at the time of format conversion, and is not recorded in the management information recording table (MPT or the like) in the MMT format data. .
Therefore, the information processing apparatus newly generates management information indicating an encoding processing mode such as an image or sound executed at the time of format conversion, and a new description indicating that the generated management information is encoding processing mode information. Along with the child, a process of recording in a management information recording table (SIT or the like) defined in the MPEG-2TS format is executed.

The process of the method S3 is the same as the process of the method P3 described with reference to FIGS. 17 and 18 as the management information recording method of the first loop of the PMT (program map table). That is, the encoding processing mode such as image and sound executed at the time of format conversion for converting MMT format data to MPEG-2TS format data is recorded as management information in each management information recording table (SIT etc.) defined in the MPEG-2TS format. It is processing to do.

FIG. 27 is an example of “setting of descriptors and the like for (E) SIT (selection information table)” of FIG. 17 described above.
FIG. 17E defines that management information such as a partial transport stream descriptor is recorded in any of the TS remultiplex processing conditions (1) to (3).
That is, an information processing apparatus that has converted MMT format data into MPEG-2TS format data uses a SIT (selection information table) that defines the encoding processing mode of images, sounds, etc. after format conversion as management information in the MPEG-2TS format. Record.

FIG. 27 is a specific example of a partial TS descriptor (Partial transport stream descriptor) which is SIT recording information stipulated in the MPEG-2TS format. In this partial TS descriptor (Partial transport stream descriptor), information necessary for recording the partial transport stream is recorded.

As shown in FIG. 27, a data recording field such as a peak rate (peak_rate) is set in the partial TS descriptor. This information is information grasped by the information processing apparatus that has performed the conversion from the MMT format data to the MPEG-2TS format data, and records data according to the format conversion processing mode that has been executed.
As an example, for example, the peak rate (peak_rate) may be set as a prescribed value for BD-ROM. In this case, it is possible to determine that the packet has a BD-ROM compatible packet configuration.

(Specific example of the management information recording method S4)
Next, a specific example of the management information recording method S4 will be described with reference to FIG.
Method S4 is a management information storage table included in MMT signaling information (MMT-SI), MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH -TOT (time offset table), the management information recorded in each of these tables is reflected in the descriptor contents of the MPEG-2TS definition, and the second descriptor loop of the SIT (selection information table) defined in the MPEG-2TS format This is a method of recording a descriptor and management information corresponding to the descriptor in (2nd loop).

FIG. 28 shows the following two data.
(1) MH-EIT (event information table) which is a management information storage table included in MMT signaling information (MMT-SI) defined in the MMT format
(2) Partial TS time descriptor, which is SIT recording information stipulated in the MPEG-2TS format

The MH-EIT (event information table) stipulated in the MMT format is a table included in the MMT signaling information (MMT-SI), and includes content-related information such as the name of the content (program etc.), the broadcast date and time, and the description of the content. Is a table in which is recorded.
Also, event time information and time information at the time of transmission are described in a partial TS time descriptor (Partial TS time descriptor) which is SIT recording information defined in the MPEG-2TS format.

These two pieces of data include common management information, and an information processing apparatus that performs format conversion uses the recording information of the MH-EIT (event information table) included in the MMT signaling information (MMT-SI) to generate MPEG. -Record information of a partial TS time descriptor (Partial TS time descriptor), which is SIT record information of TS format stipulation, is generated.

Specifically, as shown in FIG. 28 (a), for example, 40-bit and 24-bit data in the [start_time] and [duration] fields recorded in the MH-EIT in the MMT format are converted into SIT defined in the MPEG-2TS standard. The process of recording as 40-bit and 24-bit data in the [event_start_time] and [duration] fields of the partial TS time descriptor is executed.

(Specific example of management information recording method S5)
Next, a specific example of the management information recording method S5 will be described with reference to FIG.
System S5 is a management information storage table included in MMT signaling information (MMT-SI), MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH -TOT (time offset table), the “MH-xxxx descriptor” recorded in each of these tables is converted into an MPEG-2TS definition descriptor, and the SIT (selection information table) of the MPEG-2TS format specification In this method, a descriptor and management information corresponding to the descriptor are recorded in a two-descriptor loop (2nd loop).

FIG. 29 shows the following two data.
(1) MH-short format event descriptor of MH-EIT (event information table) which is a management information storage table included in MMT signaling information (MMT-SI) defined in MMT format (2) SIT defined in MPEG-2TS format Note that the short format event descriptor is composed of an event name, data representing a short description of the event in text format, and the like.

The information processing apparatus that executes format conversion uses 16-bit data of a descriptor tag (descriptor_tag) indicating an MH-short format event descriptor of MH-EIT (event information table) included in MMT signaling information (MMT-SI) ( 0xF001) is converted into 8-bit data (0x4D) indicating a short format event descriptor tag, which is SIT recording information stipulated in the MPEG-2TS format, and recorded. A short format event descriptor that is recorded information is generated.

(Specific example of the management information recording method S6)
Next, a specific example of the management information recording method S6 will be described with reference to FIG.
Method S6 is a management information storage table included in MMT signaling information (MMT-SI), MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH -A TOT (Time Offset Table), a new MPEG-2TS definition descriptor corresponding to the "MH-xxxx descriptor" recorded in each of these tables, and a SIT (Selection Information Table) defined by the MPEG-2TS format ) In the second descriptor loop (2nd loop), and the management information corresponding to the descriptor is recorded.

FIG. 30 shows the following two data.
(1) Video component descriptor of MH-EIT (event information table) which is a management information storage table included in MMT signaling information (MMT-SI) defined in MMT format (2) SIT recording information defined in MPEG-2TS format Newly defined video component descriptor as

The video component descriptor of the MH-EIT (event information table) stipulated in the MMT format is a descriptor including parameters, descriptions, and the like related to the video component. It is also used to represent elementary streams in character format.

The video component descriptor is defined in the MMT format, and is set to record management information in an MH-EIT (event information table).
However, the SIT defined by the MPEG-2TS format does not have the definition of the video component descriptor and is not set to record management information corresponding to the video component.
In such a case, the information processing apparatus that executes format conversion describes a new SIT (MPEG-2TS) specification description indicating management information similar to the video component descriptor of the MH-EIT (event information table) of the MMT format specification. A new child is newly generated and recorded in the second descriptor loop (2nd loop) of the SIT (selection information table).

Specifically, as shown in FIG. 30A, a new SIT (MPEG-2TS) -defined 8-bit descriptor (for example, corresponding to the MPT-defined 16-bit descriptor (0x8010) indicating the video component descriptor (for example, Any useable free code 0x80 to 0xBF) is newly generated and recorded, and management information corresponding to the video component is obtained from the MH-EIT (event information table) defined in the MMT format, and the SIT To record.

As described above, in the MPEG-2TS format, a plurality of 8-bit data is defined in advance as descriptor codes indicating various management information, but codes in the range of 0x80 to 0xBF are free codes. The setting is such that free management information can be used in association with it.
The information processing apparatus that executes format conversion selects one code from codes (8-bit data) in the range of 0x80 to 0xBF, and sets the selected code as a new SIT (indicating management information similar to the MPT-defined descriptor). MPEG-2TS) can be set as a standard descriptor.

(Specific example of the management information recording method S7)
Next, a specific example of the management information recording method S7 will be described with reference to FIG.
The system S7 is a second descriptor loop (2nd loop) of the SIT (selection information table) according to the stream generated in the remultiplexing process of the TS (transport stream) stipulated in the MPEG-2 TS format executed at the time of format conversion. Is generated, and a new descriptor and management information corresponding to the descriptor are recorded in the second descriptor loop (2nd loop) of the SIT corresponding to the stream type (Stream_type). .

The process of the method S7 is the same as the process of the method S3 described with reference to FIG. 21 as the first loop management information recording method. That is, the encoding processing mode such as image and sound executed at the time of format conversion for converting MMT format data to MPEG-2TS format data is recorded as management information in each management information recording table (SIT etc.) defined in the MPEG-2TS format. It is processing to do.

FIG. 31 is an example of “descriptor setting for (E) SIT (selection information table)” in FIG. 17 described above.
FIG. 17E defines that management information such as a partial transport stream descriptor is recorded in any of the TS remultiplex processing conditions (1) to (3).
That is, an information processing apparatus that has converted MMT format data into MPEG-2TS format data uses a SIT (selection information table) that defines the encoding processing mode of images, sounds, etc. after format conversion as management information in the MPEG-2TS format. Record.

FIG. 31 is a specific example of a stuff descriptor that is SIT recording information stipulated in the MPEG-2TS format. The stuff descriptor (stuffing descriptor) is used for invalidating a previously encoded descriptor and for inserting a dummy descriptor for stuffing a table.

The information to be recorded in this stuff descriptor (stuffing descriptor) is information grasped by the information processing apparatus that has performed conversion from the MMT format data to the MPEG-2TS format data. Based on this grasping information, the data Record.

[7. Configuration and processing of information processing apparatus that executes format conversion processing]
Next, the configuration and processing of an information processing apparatus that executes processing for inputting MMT format data and converting it into MPEG-2TS format data will be described with reference to FIG.
The MPEG-2TS format data after the format conversion is recorded on, for example, an information recording medium (media). Alternatively, it is redistributed to other devices via the network.

FIG. 32 is a diagram showing a configuration of an information processing apparatus 300 that executes processing for inputting MMT format data and converting it into MPEG-2TS format data.

The data input unit 301 inputs MMT format data 331, that is, MMT format data 331 including image data, audio data, caption data, and management information (TLV-SI, MMT-SI) and the like.
The data input unit 301 is a receiving unit that transmits MMT format data 331, for example, a receiving unit that receives transmission data from a broadcasting station, a content server, or the like, or a media reading unit that reads data from a medium on which MMT format data 331 is recorded. Composed of etc.

The MMT format data 331 input from the data input unit 301 is data according to the data format described above with reference to FIG. 3, and includes high-definition image data such as HEVC images, for example.

The MMT format data 331 is stored in the storage unit 304 under the control of the control unit 303.
The user input unit 302 inputs, for example, a conversion processing start request to MPEG-2TS format data.

When a format conversion start request is input from the user input unit 302, the MMT format data 331 stored in the storage unit 304 is input to the demultiplexer (DeMUX) 305 using this input as a trigger.
The demultiplexer (DeMUX) 305 performs the following processing.
Separation processing of signaling information (TLV-SI) from the received signal;
Packet separation processing according to the data type of the MMTP packet, specifically, separation processing of images, audio, captions, signaling information (MMT-SI),

The signaling information (TLV-SI) and the signaling information (MMT-SI) separated by the demultiplexer (DeMUX) 305 are input to the management information conversion unit 314 of the format conversion unit 306.
The image, audio, and subtitles separated by the demultiplexer (DeMUX) 305 are input to the image data conversion unit 311, the audio data conversion unit 312, and the subtitle data conversion unit 313 of the format conversion unit 306 according to the data type, respectively. The

The image data conversion unit 311 acquires image data from the MMT format data 331 input by the data input unit 301 and stored in the storage unit 304, and generates stream file storage data defined in the MPEG-2TS format. .
The audio data conversion unit 312 acquires audio data from the MMT format data 331 input by the data input unit 301 and stored in the storage unit 304, and generates stream file storage data defined in the MPEG-2TS format. .
The subtitle data conversion unit 313 acquires subtitle data from the MMT format data 331 input by the data input unit 301 and stored in the storage unit 304, and generates stream file storage data defined in the MPEG-2TS format. .

The management information conversion unit 314 receives signaling information (TLV-SI, MMT-SI) storing management information such as notification information and control information from the MMT format data 331 input by the data input unit 301 and stored in the storage unit 304. ) And the like, and PSI / SI (Program Specific Information / Service Information), which is management information defined in the MPEG-2TS format, is generated.
The configuration and processing of the management information conversion unit 314 will be described in detail later with reference to FIG.

The multiplexer (MUX) 315 includes image data conversion unit 311, audio data conversion unit 312, subtitle, image, and audio data converted by subtitle data conversion unit 313, and management information (PSI / SI) generated by management information conversion unit 314. ) To generate a TS (transport stream) file storing these data.

Data including TS (transport stream) file data generated by the format conversion unit 306, that is, MPEG-2TS format data 332, is stored in the output buffer 307 under the control of the control unit 303, and thereafter, via the recording unit 308. Are output and recorded on the information recording medium 320.
Alternatively, it is redistributed to another information processing apparatus via the output unit 309.
Note that the MPEG-2TS format data 332 to be recorded or redistributed in these media is, for example, the partial TS format data described above with reference to FIG. 7 (2).

Next, the detailed configuration and processing of the management information conversion unit 314 of the format conversion unit 306 shown in FIG. 32 will be described with reference to FIG.
As shown in FIG. 33, the management information conversion unit 314 includes an MMT management information buffer 351, an MMT management information (descriptor) extraction unit 352, an MPEG-2TS management information (descriptor) generation unit 353, an MPEG-2TS management information ( A PSI / SI) generation unit 354 and an MPEG-2TS management information (PSI / SI) buffer 355;

The MMT management information buffer 351 of the management information conversion unit 314 stores management information in the MMT format data from the demultiplexer (DeMUX) 305, that is, signaling information (TLV-SI, MMT-SI).

As described above, the demultiplexer (DeMUX) 305 is a packet that stores data such as images, audio, and captions from the MMT format data 331, and signaling information (TLV-) that stores management information such as notification information and control information. SI, MMT-SI) and classifying the packets into data type packets, and according to the data type, each packet is converted into an image data conversion unit 311, an audio data conversion unit 312, and a caption data conversion unit 313 in the format conversion unit 306. To the management information conversion unit 314.

The MMT management information buffer 351 of the management information conversion unit 314 acquires and stores only management information, that is, signaling information (TLV-SI, MMT-SI), from the demultiplexed data of the demultiplexer (DeMUX) 305.

The MMT management information (descriptor) extraction unit 352 acquires a table storing management information from signaling information (TLV-SI, MMT-SI) according to the MMT format stored in the management information buffer 351, and extracts the table from the table. Acquire various management information (descriptors).

The table storing the management information is specifically the following table described above with reference to FIG.
(A) TLV-NIT (network information table) included in TLV-SI
(B) MH-BIT (broadcaster information table) included in MMT-SI
(C) MH-SDT (service description table) included in MMT-SI
(D) MH-EIT (event information table) included in MMT-SI
(E) MH-TOT (time offset table) included in MMT-SI
(F) MPT (MMT package table) included in MMT-SI
The MMT management information (descriptor) extraction unit 352 acquires each of these management information storage tables, and acquires various management information (descriptors) from the table.

The acquired management information (descriptor) is input to the MPEG-2TS management information (PSI / SI) generation unit 354.
The MPEG-2TS management information (PSI / SI) generation unit 354 generates an MPEG-2TS based on the management information (descriptor) acquired by the MMT management information (descriptor) extraction unit 352 from the management information storage table of the MMT format data. Management information (PSI / SI) is generated.

The processing using the management information extracted by the MMT management information (descriptor) extraction unit 352 is performed by the management information recording methods P1, P2, P4, and P5 for the PMT (program map table) described above with reference to FIG. , And the management information recording method S1, S2, S4, S5, S6 for the SIT (selection information table) described with reference to FIG.

In other words, the management information included in the signaling information (TLV-SI, MMT-SI) according to the MMT format is used for recording as management information (PSI / SI) in the MPEG-2TS format.
In this process, some descriptors and management information extracted from the MMT format data are corrected to a format adapted to the MPEG-2TS format as necessary.

On the other hand, the MPEG-2TS management information (descriptor) generation unit 353 is management information that is not included in signaling information (TLV-SI, MMT-SI) according to the MMT format, and management information (PSI) in the MPEG-2TS format. MPEG-2TS management information (descriptor) that needs to be recorded as / SI).
Specifically, the management information recording methods P3 and P6 for the PMT (program map table) described above with reference to FIG. 13 and the management information recording method for the SIT (selection information table) described with reference to FIG. This is processing according to S3 and S7.

That is, the MPEG-2 TS management information (descriptor) generation unit 353 performs the MPEG-2 TS format according to the execution mode of the remultiplexing process of the TS (transport stream) stipulated in the MPEG-2 TS format that is executed in the format conversion process. Management information (descriptor) related to format information for recording in a prescribed PMT (program map table) or SIT (selection information table) is generated.

The management information (descriptor) generated by the MPEG-2TS management information (descriptor) generation unit 353 is input to the MPEG-2TS management information (PSI / SI) generation unit 354.
The MPEG-2TS management information (PSI / SI) generation unit 354 is based on the management information (descriptor) newly generated by the MPEG-2TS management information (descriptor) generation unit 353, and generates MPEG-2TS management information (PSI / SI). SI).

The MPEG-2TS management information (PSI / SI) generated by the MPEG-2TS management information (descriptor) generation unit 353 is stored in the MPEG-2TS management information (PSI / SI) buffer 355 and then output to the multiplexer 315. The
The multiplexer (MUX) 315 includes image data conversion unit 311, audio data conversion unit 312, subtitle, image, and audio data converted by subtitle data conversion unit 313, and management information (PSI / SI) generated by management information conversion unit 314. ) To generate a TS (transport stream) file storing these data.

[8. Management information recording processing sequence accompanying format conversion performed by information processing apparatus]
Next, in the format conversion process executed by the information processing apparatus 300 shown in FIG. 32, the process executed mainly by the management information conversion unit 314, that is, the acquisition of management information (descriptor) from the MMT format data, and the MPEG- A sequence of processing for generating management information (PSI / SI) of 2TS format data will be described with reference to flowcharts shown in FIG.

[8-1. About the entire management information recording processing sequence accompanying the format conversion performed by the information processing apparatus]
First, the overall sequence of the management information recording processing sequence accompanying the format conversion performed by the information processing apparatus will be described with reference to the flowchart shown in FIG.
Note that the processing according to the flow shown in FIG. 34 and below is executed under the control of a data processing unit (control unit) including a CPU having a program execution function, for example, according to a program stored in the storage unit of the information processing apparatus. can do.
First, the processing of each step shown in the flow of FIG. 34 will be described sequentially.

(Step S101)
First, in step S101, the information processing apparatus 300 inputs signaling information (TLV-SI).
Input is performed via the data input unit 301, and the input data is stored in the storage unit 304.

(Step S102)
Next, in step S102, the demultiplexer 305 of the information processing device 300 performs data separation processing on the input signaling information (TLV-SI), and converts the signaling information (TLV-SI) to TLV-NIT (network information table). ), And the acquired TLV-NIT (network information table) is stored in the buffer (MMT management information buffer 351) of the management information conversion unit 314.

(Step S103)
Further, the information processing apparatus 300 inputs the MMTP packet and stores it in the storage unit 304 in step S103. This input data includes image data, audio data, caption data, and signaling information (MMT-SI) storing various management information.
The demultiplexer 305 of the information processing device 300 executes processing for separating input data into image, audio, caption, and signaling information (MMT-SI) data.

(Step S104)
Next, in step S104, the demultiplexer 305 of the information processing device 300 stores the separated signaling information (MMT-SI) in the buffer (MMT management information buffer 351) of the management information conversion unit 314.

(Step S105)
Next, in step S105, the management information conversion unit 314 of the information processing device 300 uses signaling information (TLV-SI, MMT-SI) that is management information according to the MMT format stored in the MMT management information buffer 351. Then, a PMT (program map table) that is a management information recording table according to the MPEG-2TS format is generated.

In generating this PMT (program map table),
A process using information recorded in MPT (MMT package table) included in the signaling information (MMT-SI) is performed.
However, for example, management information is generated for TS format information based on TS (transport stream) remultiplexing conditions without using the recording information of the MPT (MMT package table).
That is, the information processing apparatus 300 generates management information (descriptor and the like) according to the TS remultiplexing processing condition executed by the information processing apparatus 300 and records it in the PMT.
A detailed sequence of the PMT (program map table) generation process in step S105 will be described in detail later with reference to FIGS.

(Step S106)
Next, in step S106, the management information conversion unit 314 of the information processing device 300 uses signaling information (TLV-SI, MMT-SI) that is management information according to the MMT format stored in the MMT management information buffer 351. Then, SIT (selection information table) which is a management information recording table according to the MPEG-2TS format is generated.

In the generation of this SIT (selection information table),
Processing using the following management information recording table included in the signaling information (TLV-SI, MMT-SI) is performed.
(A) TLV-NIT (network information table) included in TLV-SI
(B) MH-BIT (broadcaster information table) included in MMT-SI
(C) MH-SDT (service description table) included in MMT-SI
(D) MH-EIT (event information table) included in MMT-SI
(E) MH-TOT (time offset table) included in MMT-SI

However, for example, TS format information based on TS (transport stream) remultiplexing conditions is managed according to TS remultiplexing process conditions executed by the information processing apparatus without using the record information of the above table. Information (descriptor etc.) is generated and recorded in the SIT.
The detailed sequence of the SIT (selection information table) generation process in step S106 will be described in detail later with reference to FIGS.

(Step S107)
Next, in step S107, the information processing apparatus 300 performs TS reproduction as a process for generating MPEG-2TS format data, that is, a process for generating a transport stream (TS) including images, audio, captions, and management information (PSI / SI). Executes multiplexing processing.
This process is a process executed by the multiplexer (MUX) 315 shown in FIG.

Note that the MPEG-2TS format data generated here is, for example, the partial TS format data described above with reference to FIG.

(Step S108)
Next, in step S108, the information processing apparatus 300 stores the generated MPEG-2TS format data in the output buffer.
The generated MPEG-2TS format data is stored in the output buffer 307 shown in FIG.

(Step S109)
Next, in step S109, the information processing apparatus 300 records the MPEG-2TS format data stored in the output buffer 307 on the information recording medium (medium) or redistributes data to other information processing apparatuses via the output unit. Execute.

[8-2. Program Map Table (PMT) Generation Processing Sequence]
Next, a detailed sequence of PMT (program map table) generation processing executed in step S105 of the overall processing flow shown in FIG. 34 will be described with reference to flowcharts shown in FIGS.

The processing according to the flow shown in FIGS. 35 and 36 is executed in the management information conversion unit 314 shown in FIGS.
Hereinafter, the processing of each step will be described in order.

(Step S121)
First, in step S121, it is determined whether or not a new MPT (MMT package table) has been input to the MMT management information buffer 351 shown in FIG.
The control unit 303 constantly monitors the processing of the demultiplexer 305 and the data input to the management information conversion unit 314. Whether or not the control unit 303 has input a new MPT (MMT package table) to the MMT management information buffer 351. Determine whether.

If no new MPT (MMT package table) input is detected, the process shifts to a standby state, that is, the process of step S121 is continued.
If it is determined that a new MPT (MMT package table) has been input, the process proceeds to step S122.

(Step S122)
Next, in step S122, the management information conversion unit 314 acquires MPT (MMT package table) from the MMT management information buffer 351, and from the first descriptor loop (MPT descriptor loop) of MPT (MMT package table), Read management information (descriptor).
This process is a process executed by the MMT management information (descriptor) extraction unit 352 of the management information conversion unit 314.

As described above with reference to FIGS. 10 to 12, MPT (MMT package table), which is a management information recording table included in MMT signaling information (MMT-SI), has the following two descriptor loop layers: It has a configuration.
(1) First descriptor loop (MPT descriptor loop) (MPT_descriptors_byte)
(2) Second descriptor loop (asset descriptor loop) (asset_descriptors_byte)

In the first descriptor loop (MPT descriptor loop), management information applied to the package specified by the MMT package identifier is recorded.
In the second descriptor loop (asset descriptor loop), management information applied to the asset specified by the asset type is recorded.

In step S122, management information (descriptor) is read from the first descriptor loop (MPT descriptor loop) of MPT (MMT package table).

(Step S123)
In step S123, the management information conversion unit 314 then manages the management information (descriptor) read from the first descriptor loop (MPT descriptor loop) of the MPT (MMT package table) in accordance with the MPEG-2TS format. Convert to information (descriptor).

Specifically, for example, a process of converting a 16-bit tag descriptor defined in the MMT format into an 8-bit tag descriptor defined in the MPEG-2TS format is performed.
Alternatively, if the descriptor is not defined in the MPEG-2TS format, a process for generating a new descriptor is performed.

(Step S124)
Next, in step S124, the management information (descriptor) corresponding to the MPEG-2TS format generated in step S123 is used as the first loop (program map table) of the PMT (program map table) which is a management information recording table stipulated in the MPEG-2TS format. Perform processing to record in the descriptor loop.

As previously described with reference to FIGS. 10 to 12, the PMT (program map table), which is a management information recording table compatible with the MPEG-2TS format, has the following two descriptor loop hierarchical configurations. .
(1) First descriptor loop (program descriptor loop)
(2) Second descriptor loop (ES descriptor loop)

Management information for each program is recorded in the first descriptor loop (program descriptor loop).
Further, management information for each stream is recorded in the second descriptor loop (ES descriptor loop).
In step S124, the management information (descriptor) corresponding to the MPEG-2TS format generated in step S123 is used as the first loop (program descriptor loop) of the PMT (program map table) which is a management information recording table stipulated in the MPEG-2TS format. ) Is recorded.

Note that the processing of steps S123 to S124 is processing corresponding to the processing of methods P1 and P2 during the management information recording processing for the PMT described above with reference to FIGS. 13 to 21, for example.

(Step S125)
Next, in step S125, the management information conversion unit 314 reads the management information (descriptor) from the second descriptor loop (asset descriptor loop) of the MPT (MMT package table) acquired from the MMT management information buffer 351. .
This process is a process executed by the MMT management information (descriptor) extraction unit 352 of the management information conversion unit 314.

As described above, in the second descriptor loop (asset descriptor loop) of MPT (MMT package table) which is a management information recording table included in the MMT signaling information (MMT-SI), the asset specified by the asset type is stored. Management information applied to is recorded.
In step S125, management information (descriptor) is read from the second descriptor loop (asset descriptor loop) of MPT (MMT package table).

(Step S126)
In step S126, the management information conversion unit 314 then manages the management information (descriptor) read from the second descriptor loop (asset descriptor loop) of the MPT (MMT package table) in accordance with the MPEG-2TS format compatible management. Convert to information (descriptor).

(Step S127)
Next, in step S127, the management information (descriptor) corresponding to the MPEG-2TS format generated in step S126 is transferred to the second loop (ES in the PMT (program map table) which is a management information recording table stipulated in the MPEG-2TS format. Perform processing to record in the descriptor loop.

As described above with reference to FIGS. 10 to 12, the second descriptor loop (ES descriptor loop) of the PMT (program map table) which is a management information recording table corresponding to the MPEG-2TS format is included in the second descriptor loop (ES descriptor loop). , Management information in units of ES (elementary stream) is recorded.
In step S127, the management information (descriptor) corresponding to the MPEG-2TS format generated in step S126 is used as the second loop (ES descriptor loop) of the PMT (program map table) which is a management information recording table stipulated in the MPEG-2TS format. ) Is recorded.

Note that the processing of steps S126 to S127 is processing corresponding to the processing of methods P4 and P5 during the management information recording processing for the PMT described above with reference to FIGS. 13 to 21, for example.

(Step S131)
The processing from step S131 to step S135 is a sequence of processing that does not use recording information of MPT (MMT package table) in signaling information (MMT-SI) of MMT format data in management information recording processing for PMT (program map table). It is.

That is, this is a sequence of processing for recording TS format information and the like based on TS (transport stream) re-multiplexing conditions in a PMT (program map table).
That is, the information processing apparatus 300 generates management information (descriptor, etc.) according to the TS remultiplexing processing conditions executed by the information processing apparatus 300 without using the recording information of the MPT (MMT package table) to generate the PMT. To record.
The processes in steps S131 to S135 are processes corresponding to the processes of methods P3 and P6 during the management information recording process for the PMT described above with reference to FIGS. 13 to 21, for example.

First, in step S131, the information processing apparatus 300 acquires MPEG-2TS format data re-multiplexing conditions executed by the information processing apparatus.
Specifically, for example, (A) TS (transport stream) remultiplexing processing condition of item (A) in FIG.
This item (A) is an encoding process mode such as an image and a sound that can be executed at the time of format conversion. For example, there are the following three examples.
(1) TS remultiplexing process without conversion (2) Image conversion TS remultiplexing recording process (3) Video / audio conversion TS remultiplexing process In step S131, the information processing apparatus 300, for example, any type of multiplexing described above Confirm whether to execute the conversion process.

(Step S132)
Next, in step S132, the information processing apparatus 300, based on the remultiplex condition confirmed in step S131, the first loop (program program table) of the PMT (program map table) that is a management information recording table stipulated in the MPEG-2TS format. Management information (descriptor etc.) to be recorded in the descriptor loop is generated.

(Step S133)
Next, in step S133, the management information (descriptor etc.) corresponding to the MPEG-2TS format generated in step S132 is transferred to the first loop (program map table) PMT (program map table) which is a management information recording table stipulated in the MPEG-2TS format. Perform processing to be recorded in the program descriptor loop.
A specific example of this management information is, for example, the management information described above with reference to FIG.

(Step S134)
Next, in step S134, the information processing apparatus 300, based on the re-multiplexing condition confirmed in step S131, the second loop (ES of the PMT (program map table) that is a management information recording table stipulated in the MPEG-2TS format. Management information (descriptor etc.) to be recorded in the descriptor loop is generated.

(Step S135)
Next, in step S135, the management information (descriptor etc.) corresponding to the MPEG-2TS format generated in step S134 is transferred to the second loop (program map table) PMT (program map table) which is a management information recording table stipulated in the MPEG-2TS format. The process of recording in the ES descriptor loop) is performed.
A specific example of this management information is, for example, the management information described above with reference to FIG.

[8-3. Selection information table (SIT) generation processing sequence]
Next, a detailed sequence of SIT (selection information table) generation processing executed in step S106 of the overall processing flow shown in FIG. 34 will be described with reference to flowcharts shown in FIGS.

The processing according to the flow shown in FIGS. 37 and 38 is executed in the management information conversion unit 314 shown in FIGS. 32 and 33.
Hereinafter, the processing of each step will be described in order.

(Step S151)
First, in step S151, it is determined whether or not new signaling information (TLV-SI, MMT-SI) has been input to the MMT management information buffer 351 shown in FIG.
The control unit 303 constantly monitors the processing of the demultiplexer 305 and the data input to the management information conversion unit 314, and the control unit 303 stores new signaling information (TLV-SI, MMT-SI) in the MMT management information buffer 351. It is determined whether or not there is an input.

When input of new signaling information (TLV-SI, MMT-SI) is not detected, the process shifts to a standby state, that is, the process of step S151 is continued.
If it is determined that new signaling information (TLV-SI, MMT-SI) has been input, the process proceeds to step S152.

(Step S152)
Next, in step S152, the management information conversion unit 314 acquires the signaling information (TLV-SI, MMT-SI) from the MMT management information buffer 351, and transmits the transmission information from the management information storage table that constitutes these signaling information. Read related management information (descriptor).
This process is a process executed by the MMT management information (descriptor) extraction unit 352 of the management information conversion unit 314.

The management information storage table constituting the signaling information (TLV-SI, MMT-SI) in which the management information for storing in the selection information table (SIT) is recorded will be described with reference to FIG. 9 and FIG. As shown in the table below.
(A) TLV-NIT (network information table)
(B) MH-BIT (Broadcaster information table)
(C) MH-SDT (service description table)
(D) MH-EIT (event information table)
(E) MH-TOT (time offset table)
In step S152, transmission information-related management information (descriptor) is read from these tables.

(Step S153)
Next, in step S153, the management information conversion unit 314 performs management information storage tables (TLV-NIT, MH-BIT, MH-SDT, MH-EIT) constituting the signaling information (TLV-SI, MMT-SI). , MH-TOT), the transmission information related management information (descriptor) is converted into MPEG-2TS format compatible management information (descriptor).

Specifically, for example, a process of converting a 16-bit tag descriptor stipulated in the MMT format into an 8-bit tag descriptor stipulated in the MPEG-2TS format is performed.
Alternatively, if the descriptor is not defined in the MPEG-2TS format, a process for generating a new descriptor is performed.

(Step S154)
Next, in step S154, the management information (descriptor) corresponding to the MPEG-2TS format generated in step S153 is replaced with the SIT (selection information table) of the management information recording table stipulated by the MPEG-2TS format.
(1) Record data for the first descriptor loop (transmission information descriptor loop),
(2) Record data for the second descriptor loop (service information descriptor loop),
A process of separating the recording data for each descriptor loop is executed.

As described above with reference to FIGS. 22 to 23, the SIT (selection information table), which is a management information recording table corresponding to the MPEG-2TS format, has the following two descriptor loop hierarchical configurations.
(1) First descriptor loop (transmission information descriptor loop)
(2) Second descriptor loop (service information descriptor loop)

In the first descriptor loop (transmission information descriptor loop), management information in units of transmission information is recorded.
In the second descriptor loop (service information descriptor loop), management information in units of service information (programs and the like) is recorded.

In step S154, the management information (descriptor) corresponding to the MPEG-2TS format generated in step S153 is
(1) For management information of transmission information units, recorded data for the first descriptor loop (transmission information descriptor loop),
(2) For the management information of the transmission information unit, recorded data for the second descriptor loop (service information descriptor loop),
In this way, a process for separating the management information into each of the recording data for each descriptor loop is executed.

(Step S155)
Next, in step S155, the management information conversion unit 314 converts the management information of the transmission information unit separated as the recording data for the first descriptor loop (transmission information descriptor loop) in step S154 according to the MPEG-2TS format specification. Processing to record in the first loop (transmission information descriptor loop) of SIT (selection information table) which is a management information recording table is performed.

Note that the process of step S155 is a process corresponding to the processes of the system S1 and system S2 during the management information recording process for the SIT described above with reference to FIGS. 24 to 31, for example.

(Step S156)
Next, in step S156, the management information conversion unit 314 converts the management information of the service information unit separated as the recording data for the second descriptor loop (service information descriptor loop) in step S154 according to the MPEG-2TS format specification. Processing for recording in the second loop (service information descriptor loop) of SIT (selection information table) which is a management information recording table is performed.

As described above with reference to FIGS. 22 to 23, the second descriptor loop (service information descriptor loop) of the SIT (selection information table) which is a management information recording table corresponding to the MPEG-2TS format. Management information of service information units is recorded.

In step S156, the management information (descriptor) corresponding to the MPEG-2TS format is converted into a second loop (service information descriptor) of SIT (selection information table) which is a management information recording table stipulated in the MPEG-2TS format in service information units. Loop).

Note that the process of step S156 is a process corresponding to the processes of method S4, method S5, and method S6 during the management information recording process for the SIT described above with reference to FIGS.

(Step S161)
The processing from step S161 to step S165 is a management information recording table (TLV-NIT, MH) included in the signaling information (TLV-SI, MMT-SI) of MMT format data in the management information recording processing for SIT (selection information table). -BIT, MH-SDT, MH-EIT, MH-TOT) is a processing sequence that does not use recorded information.

That is, this is a sequence of processing for recording TS format information and the like based on TS (transport stream) re-multiplexing conditions in SIT (selection information table).
That is, the information processing apparatus 300 generates management information (descriptor, etc.) according to TS remultiplexing processing conditions executed by the information processing apparatus 300 without using the recording information of MPT (MMT package table), and performs SIT. To record.
The processing of steps S161 to S165 is processing corresponding to the processing of methods S3 and S7 during the management information recording processing for the SIT described above with reference to FIGS. 24 to 31, for example.

First, in step S161, the information processing apparatus 300 acquires MPEG-2TS format data re-multiplexing conditions executed by the information processing apparatus.
Specifically, for example, (A) TS (transport stream) remultiplexing processing condition of item (A) in FIG.
This item (A) is an encoding process mode such as an image and a sound that can be executed at the time of format conversion. For example, there are the following three examples.
(1) TS re-multiplexing process without conversion (2) Image conversion TS re-multiplexing recording process (3) Video / audio conversion TS re-multiplexing process In step S161, the information processing apparatus 300, for example, any type of multiplexing described above Confirm whether to execute the conversion process.

(Step S162)
Next, in step S162, the information processing apparatus 300, based on the remultiplex condition confirmed in step S161, the first loop (transmission information table) of SIT (selection information table) which is a management information recording table stipulated in the MPEG-2TS format. The management information (descriptor etc.) of the transmission information unit to be recorded in the information descriptor loop) is generated.

(Step S163)
Next, in step S163, the management information (descriptor etc.) corresponding to the MPEG-2TS format generated in step S162 is transferred to the first loop (selection information table) SIT (selection information table) which is a management information recording table stipulated in the MPEG-2TS format. Processing to be recorded in the transmission information descriptor loop).
A specific example of this management information is, for example, the management information described above with reference to FIG.

(Step S164)
Next, in step S164, the information processing apparatus 300, based on the re-multiplexing condition confirmed in step S161, the second loop (service information table) of SIT (selection information table) that is a management information recording table stipulated in the MPEG-2TS format. The management information (descriptor etc.) of the service information unit to be recorded in the information descriptor loop) is generated.

(Step S165)
Next, in step S165, the management information (descriptor etc.) corresponding to the MPEG-2TS format generated in step S164 is transferred to the second loop (selection information table) SIT (selection information table) which is a management information recording table stipulated in the MPEG-2TS format. Perform processing to record in the service information descriptor loop.
A specific example of this management information is, for example, the management information described above with reference to FIG.

As described above, with reference to the flow shown in FIGS. 34 to 38, the management information defined in the MMT format is recorded as management information (PSI / SI) defined in the MPEG-2 TS format, and the TS multiplexing processing conditions The processing sequence for recording the management information corresponding to the management information (PSI / SI) defined in the MPEG-2TS format has been described.
Through these processes, management information stipulated in the MPEG-2TS format can be recorded without excess or deficiency when converting from the MMT format to the MPEG-2TS format.

For example, management information defined in the MMT format is recorded as management information (PSI / SI) defined in the MPEG-2TS format, and information such as the format of each stream based on the TS multiplexing conditions is also defined in the MPEG-2TS format. Management information (PSI / SI).

By performing these processes, the apparatus that reads out and reproduces the MPEG-2TS format data including the management information (PSI / SI) from the medium is an apparatus that can execute only the reproduction process for the MPEG-2TS format data. Also, normal content reproduction can be performed.

Even if the device that receives and reproduces the redistribution data of the MPEG-2TS format data including the management information (PSI / SI) is a device that can execute only the reproduction processing for the MPEG-2TS format data, it is normal. Content reproduction.

[9. Configuration example of information processing apparatus]
Next, a hardware configuration example of an information processing apparatus applicable as an information processing apparatus that executes data recording on the information recording medium and data reproduction from the information recording medium will be described with reference to FIG.

A CPU (Central Processing Unit) 501 functions as a data processing unit that executes various processes according to a program stored in a ROM (Read Only Memory) 502 or a storage unit 508. For example, processing according to the sequence described in the above-described embodiment is executed. A RAM (Random Access Memory) 503 stores programs executed by the CPU 501 and data. The CPU 501, ROM 502, and RAM 503 are connected to each other by a bus 504.

The CPU 501 is connected to an input / output interface 505 via a bus 504. The input / output interface 505 is connected to an input unit 506 including various switches, a keyboard, a mouse, and a microphone, and an output unit 507 including a display and a speaker. Yes. The CPU 501 executes various processes in response to a command input from the input unit 506 and outputs a processing result to the output unit 507, for example.

The storage unit 508 connected to the input / output interface 505 includes, for example, a hard disk and stores programs executed by the CPU 501 and various data. The communication unit 509 functions as a data transmission / reception unit via a network such as the Internet or a local area network, and further as a broadcast wave transmission / reception unit, and communicates with an external device.

The drive 510 connected to the input / output interface 505 drives a removable medium 511 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory such as a memory card, and executes data recording or reading.

[10. Summary of composition of the present disclosure]
As described above, the embodiments of the present disclosure have been described in detail with reference to specific embodiments. However, it is obvious that those skilled in the art can make modifications and substitutions of the embodiments without departing from the gist of the present disclosure. In other words, the present invention has been disclosed in the form of exemplification, and should not be interpreted in a limited manner. In order to determine the gist of the present disclosure, the claims should be taken into consideration.

The technology disclosed in this specification can take the following configurations.
(1) having a data processing unit for converting MMT format data into MPEG-2TS format data;
The data processing unit
The management information is recorded in the management information recording table defined in the MPEG-2TS format.
An information processing apparatus that selects management information of the same type as management information stipulated by the MPEG-2TS format from a management information recording table stipulated by the MMT format and records the management information in a management information recording table stipulated by the MPEG-2TS format.

(2) The data processing unit
Management information selected from the management information recording table defined in the MMT format is
If the data format differs from the MPEG-2TS format-defined management information data format, the data format is converted into the MPEG-2TS format-defined data format and recorded in the MPEG-2TS format-defined management information recording table (1) Information processing device.

(3) The data processing unit
When management information of the same type as the management information recorded in the management information recording table defined in the MMT format is not defined as management information defined in the MPEG-2TS format,
The management information recorded in the management information recording table defined in the MMT format is generated and recorded in the management information recording table defined in the MPEG-2 TS format (1) or ( The information processing apparatus according to 2).

(4) The data processing unit
When the management information of the same type as the management information defined in the MPEG-2TS format is not recorded in the management information recording table defined in the MMT format,
The information processing apparatus according to any one of (1) to (3), wherein new management information is generated and recorded in a management information recording table defined in the MPEG-2TS format.

(5) The data processing unit
When the management information recorded in the management information recording table defined in the MMT format is management information that needs to be corrected according to the processing status, the management information is corrected, and the corrected management information is converted into management information specified in the MPEG-2 TS format. The information processing apparatus according to any one of (1) to (4), wherein the information is recorded in the management information recording table defined in the MPEG-2TS format.

(6) The data processing unit
When the management information recorded in the management information recording table stipulated in the MMT format includes copy control information, time information, or network information, the management information including these information is corrected according to the processing status, and the corrected management is performed. The information processing apparatus according to (5), wherein the information is recorded in a management information recording table compliant with the MPEG-2TS format as management information compliant with the MPEG-2TS format.

(7) The management information recording table defined in the MPEG-2TS format is
The information processing apparatus according to any one of (1) to (6), which is at least one of a PMT (program map table) and an SIT (selection information table).

(8) The management information recording table defined in the MMT format is
The information processing apparatus according to any one of (1) to (7), which is a management information recording table included in at least one of TLV-SI and MMT-SI which is signaling information stipulated in MMT format.

(9) The management information recording table defined in the MMT format is
TLV-NIT (network information table) included in the TLV-SI, or
MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH-TOT (time offset table), MPT (MMT package table) included in the MMT-SI The information processing apparatus according to (8), wherein the information processing apparatus is at least one of the tables.

(10) The data processing unit
Management information recorded in the first descriptor loop (MPT descriptor loop) of MPT (MMT package table) which is a management information recording table of MMT format specification,
Recorded in the first descriptor loop (program descriptor loop) of the PMT (program map table) which is a management information recording table defined in the MPEG-2TS format;
Management information recorded in the second descriptor loop (asset descriptor loop) of the MPT (MMT package table),
The information processing apparatus according to any one of (1) to (9), wherein the information is recorded in a second descriptor loop (ES descriptor loop) of the PMT (program map table).

(11) The data processing unit
The management information recorded in the management information recording table included in TLV-SI or MMT-SI, which is signaling information defined in the MMT format, is stored in a SIT (selection information table), which is a management information recording table defined in the MPEG-2 TS format. It is a configuration to record,
The management information of the transmission information unit in the management information recorded in the management information recording table included in the TLV-SI or MMT-SI is used as the first descriptor loop (transmission information descriptor) of the SIT (selection information table). Loop),
The management information of the service information unit in the management information recorded in the management information recording table included in the TLV-SI or MMT-SI is stored in the second descriptor loop (service information descriptor) of the SIT (selection information table). The information processing apparatus according to any one of (1) to (10).

(12) The data processing unit
Management information including encoding mode information corresponding to the TS remultiplexing processing mode executed in the conversion process from the MMT format to the MPEG-2TS format,
The information processing apparatus according to any one of (1) to (11), wherein the information is newly generated as management information compliant with the MPEG-2TS format and recorded in a management information recording table compliant with the MPEG-2TS format.

(13) The information processing apparatus further includes:
The information processing apparatus according to any one of (1) to (12), wherein the MPEG-2TS format data generated by the data processing unit is recorded on an information recording medium or output to the outside.

(14) The information processing apparatus according to any one of (1) to (13), wherein the MPEG-2TS format data generated by the data processing unit through format conversion is partial TS format data.

(15) The data processing unit
A 16-bit tag descriptor, which is management information recorded in the management information recording table defined in the MMT format,
The information processing apparatus according to any one of (1) to (14), wherein the information is converted into an 8-bit tag descriptor that is management information stipulated in the MPEG-2TS format and recorded in a management information recording table stipulated in the MPEG-2TS format.

(16) An information processing method executed in the information processing apparatus,
The information processing apparatus includes:
A data processing unit for converting MMT format data into MPEG-2TS format data;
The data processing unit is
Execute management information recording processing for the management information recording table defined in the MPEG-2TS format,
In the management information recording process,
An information processing method for executing processing for selecting management information of the same type as management information stipulated in the MPEG-2TS format from a management information recording table stipulated in the MMT format and recording the management information in the management information recording table stipulated in the MPEG-2TS format.

(17) A program for executing information processing in an information processing device,
The information processing apparatus includes:
A data processing unit for converting MMT format data into MPEG-2TS format data;
The program is stored in the data processing unit.
Management information recording processing for the management information recording table defined in the MPEG-2TS format is executed,
In the management information recording process,
A program for executing the process of selecting management information of the same type as the management information defined in the MPEG-2TS format from the management information recording table defined in the MMT format and recording it in the management information recording table defined in the MPEG-2TS format.

Further, the series of processes described in the specification can be executed by hardware, software, or a combined configuration of both. When executing processing by software, the program recording the processing sequence is installed in a memory in a computer incorporated in dedicated hardware and executed, or the program is executed on a general-purpose computer capable of executing various processing. It can be installed and run. For example, the program can be recorded in advance on a recording medium. In addition to being installed on a computer from a recording medium, the program can be received via a network such as a LAN (Local Area Network) or the Internet and installed on a recording medium such as a built-in hard disk.

In addition, the various processes described in the specification are not only executed in time series according to the description, but may be executed in parallel or individually according to the processing capability of the apparatus that executes the processes or as necessary. Further, in this specification, the system is a logical set configuration of a plurality of devices, and the devices of each configuration are not limited to being in the same casing.

As described above, according to the configuration of an embodiment of the present disclosure, a configuration for recording management information stipulated in the MPEG-2TS format without excess or deficiency when converting from the MMT format to the MPEG-2TS format is realized. The
Specifically, for example, in the process of converting MMT format data into MPEG-2TS format data, management information of the same type as the management information defined in the MPEG-2TS format is selected from the management information recording table defined in the MMT format, Recorded in the management information recording table defined in the MPEG-2TS format. When the data format of the management information defined by each format is different, the data format is converted into a data format defined by the MPEG-2TS format and recorded.
With this configuration, when converting from the MMT format to the MPEG-2TS format, a configuration for recording management information stipulated in the MPEG-2TS format without excess or deficiency is realized.

20 Transmitting Device 21 Broadcast Server 22 Data Distribution Server 30 Information Processing Device 31 BD Recorder 32 TV
33 PC
34 Mobile terminal 40 Information recording medium (media)
41 BD
42 HDD
43 Flash memory 50 MMT format data 60 MPEG-2TS format data 300 Information processing device 301 Data input unit 302 User input unit 303 Control unit 304 Storage unit 305 Demultiplexer 306 Format conversion unit 307 Output buffer 308 Recording unit 309 Output unit 311 Image data Conversion unit 312 Audio data conversion unit 313 Subtitle data conversion unit 314 Management information conversion unit 315 Multiplexer 320 Information recording medium 331 MMT format data 332 MPEG-2TS format data 351 MMT management information buffer 352 MMT management information (descriptor) extraction unit 353 MPEG -2TS management information (descriptor) generation unit 354 MPEG-2TS management information (PSI / SI) generation unit 355 MPEG-2TS Management information (PSI / SI) buffer 501 CPU
502 ROM
503 RAM
504 Bus 505 I / O interface 506 Input unit 507 Output unit 508 Storage unit 509 Communication unit 510 Drive 511 Removable media

Claims

A data processing unit for converting MMT format data into MPEG-2TS format data;
The data processing unit
The management information is recorded in the management information recording table defined in the MPEG-2TS format.
An information processing apparatus that selects management information of the same type as management information stipulated by the MPEG-2TS format from a management information recording table stipulated by the MMT format and records the management information in a management information recording table stipulated by the MPEG-2TS format.
The data processing unit
Management information selected from the management information recording table defined in the MMT format is
2. The data format according to claim 1, wherein if the data format differs from the data format of the management information stipulated in the MPEG-2TS format, the data format is converted into a data format stipulated in the MPEG-2TS format and recorded in the management information recording table defined in the MPEG-2TS format Information processing device.
The data processing unit
When management information of the same type as the management information recorded in the management information recording table defined in the MMT format is not defined as management information defined in the MPEG-2TS format,
2. The management information recording table defined in the MPEG-2TS format is generated by generating new management information defined in the MPEG-2TS format that is the same type as the management information recorded in the management information recording table defined in the MMT format. Information processing device.
The data processing unit
When the management information of the same type as the management information defined in the MPEG-2TS format is not recorded in the management information recording table defined in the MMT format,
The information processing apparatus according to claim 1, wherein new management information is generated and recorded in a management information recording table stipulated by the MPEG-2TS format.
The data processing unit
When the management information recorded in the management information recording table defined in the MMT format is management information that needs to be corrected according to the processing status, the management information is corrected, and the corrected management information is converted into management information specified in the MPEG-2 TS format. The information processing apparatus according to claim 1, wherein the information is recorded in a management information recording table defined in the MPEG-2TS format.
The data processing unit
When the management information recorded in the management information recording table stipulated in the MMT format includes copy control information, time information, or network information, the management information including these information is corrected according to the processing status, and the corrected management is performed. 6. The information processing apparatus according to claim 5, wherein the information is recorded in a management information recording table compliant with the MPEG-2TS format as management information compliant with the MPEG-2TS format.
The management information recording table defined in the MPEG-2TS format is
The information processing apparatus according to claim 1, wherein the information processing apparatus is at least one of PMT (program map table) and SIT (selection information table).
The management information recording table of the MMT format rule is
2. The information processing apparatus according to claim 1, wherein the information processing apparatus is a management information recording table included in at least one of TLV-SI and MMT-SI which are signaling information defined in the MMT format.
The management information recording table of the MMT format rule is
TLV-NIT (network information table) included in the TLV-SI, or
MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), MH-TOT (time offset table), MPT (MMT package table) included in the MMT-SI The information processing apparatus according to claim 8, wherein the information processing apparatus is at least one of the tables.
The data processing unit
Management information recorded in the first descriptor loop (MPT descriptor loop) of MPT (MMT package table) which is a management information recording table of MMT format specification,
Recorded in the first descriptor loop (program descriptor loop) of the PMT (program map table) which is a management information recording table defined in the MPEG-2TS format;
Management information recorded in the second descriptor loop (asset descriptor loop) of the MPT (MMT package table),
The information processing apparatus according to claim 1, wherein the information processing apparatus records in a second descriptor loop (ES descriptor loop) of the PMT (program map table).
The data processing unit
The management information recorded in the management information recording table included in TLV-SI or MMT-SI, which is signaling information defined in the MMT format, is stored in a SIT (selection information table), which is a management information recording table defined in the MPEG-2 TS format. It is a configuration to record,
The management information of the transmission information unit in the management information recorded in the management information recording table included in the TLV-SI or MMT-SI is used as the first descriptor loop (transmission information descriptor) of the SIT (selection information table). Loop),
The management information of the service information unit in the management information recorded in the management information recording table included in the TLV-SI or MMT-SI is stored in the second descriptor loop (service information descriptor) of the SIT (selection information table). The information processing apparatus according to claim 1, wherein recording is performed in a loop.
The data processing unit
Management information including encoding mode information corresponding to the TS remultiplexing processing mode executed in the conversion process from the MMT format to the MPEG-2TS format,
The information processing apparatus according to claim 1, wherein the information is newly generated as management information compliant with the MPEG-2TS format and recorded in a management information recording table compliant with the MPEG-2TS format.
The information processing apparatus further includes:
The information processing apparatus according to claim 1, wherein the MPEG-2TS format data generated by the data processing unit is recorded on an information recording medium or output to the outside.
The information processing apparatus according to claim 1, wherein the MPEG-2TS format data generated by the data processing unit by format conversion is partial TS format data.
The data processing unit
A 16-bit tag descriptor, which is management information recorded in the management information recording table defined in the MMT format,
2. The information processing apparatus according to claim 1, wherein the information is converted into an 8-bit tag descriptor that is management information stipulated in the MPEG-2TS format and recorded in a management information recording table stipulated in the MPEG-2TS format.
An information processing method executed in an information processing apparatus,
The information processing apparatus includes:
A data processing unit for converting MMT format data into MPEG-2TS format data;
The data processing unit is
Execute management information recording processing for the management information recording table defined in the MPEG-2TS format,
In the management information recording process,
An information processing method for executing processing for selecting management information of the same type as management information stipulated in the MPEG-2TS format from a management information recording table stipulated in the MMT format and recording the management information in the management information recording table stipulated in the MPEG-2TS format.
A program for executing information processing in an information processing apparatus;
The information processing apparatus includes:
A data processing unit for converting MMT format data into MPEG-2TS format data;
The program is stored in the data processing unit.
Management information recording processing for the management information recording table defined in the MPEG-2TS format is executed,
In the management information recording process,
A program for executing the process of selecting management information of the same type as the management information defined in the MPEG-2TS format from the management information recording table defined in the MMT format and recording it in the management information recording table defined in the MPEG-2TS format.