JP7033537B2 - Information processing equipment, information processing methods, and programs - Google Patents

Description

The present disclosure relates to an information processing apparatus, an information processing method, and a program. More specifically, the current media records the management information such as various control information and attribute information included in the MMT (MPEG Media Transport) format data, which is being standardized as a future data transmission standard for broadcast waves and the like. The present invention relates to an information processing apparatus that performs processing for converting management information corresponding to MPEG-2 TS format data, which is widely used as a data format for transfer, an information processing method, and a program.

Currently, standardization is underway to realize data transmission of high-quality images such as broadcasting of 4K images and 8K images, 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 method for transmitting coded data such as images (Video), audio (Audio), subtitles (Subtitles), etc., which constitute content such as a broadcast program, via a broadcast wave or a network ( It defines (container format / transport format).
The MMT format is a data storage / transfer method (container format / transport format) for contents such as images (Video), audio (Audio), and subtitles (Subtile), and is, for example, a 4K image, an 8K image, or a high dynamic range (a high dynamic range). HDR: HighDynamic Range) It is planned to be used for broadcasting next-generation contents such as images.

On the other hand, the MPEG-2 TS format is used as a format for recording contents for current broadcasting and information recording media (media).
That is, for example, in the currently used television broadcasting, MPEG-is used as a data storage / transfer method (container format / transport format) for content consisting of images (Video), audio (Audio), subtitles (Subtitles), and the like. The 2TS format is used, and the format applied to data recording / reproduction for information recording media (media) such as BD (Blu-ray (registered trademark) Disc) and information recording media such as flash memory is also the MPEG-2 TS format. Is.
The data recording / reproduction processing configuration using BD is described in, for example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2011-023071).

In this way, the MPEG-2 TS format is used for data recording using devices that execute data transmission / reception via broadcast waves and networks, such as many current televisions, recording / playback devices, and communication devices, and information recording media (media). It is a general format that is often used in various devices such as playback devices.

In addition, 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, are also used. , Standards for data communication processing using the MPEG-2 TS format are specified.

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

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

Therefore, in order to make the content distributed from the broadcasting station available in the current equipment, the MMT format data distributed from the broadcasting station or the like is converted into MPEG-2 TS format data and an information recording medium such as BD or flash memory is used. It is necessary to perform processing such as recording in the data or redistributing to other network-connected devices.
However, the current situation is that the specific processing for converting the MMT format data into the MPEG-2 TS format data has not been clearly defined at this time.

Japanese Unexamined Patent Publication No. 2011-023071

This disclosure has been made in view of the above problems, for example, and various controls included in MMT (MPEG Media Transport) format data, which is being standardized as a future data transmission standard for broadcast waves and the like. An information processing device and an information processing method that perform processing to convert management information such as information and attribute information into management information compatible with the current media recording and MPEG-2 TS format data that is widely used as a data format for transfer. , As well as the purpose of providing the program.

The first aspect of this disclosure is
It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The data processing unit
It is a configuration that records management information for the management information recording table specified in the MPEG-2 TS format.
The information processing device selects management information of the same type as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format and records the management information in the management information recording table specified in the MPEG-2 TS format.

Further, the second aspect of the present disclosure is
It is an information processing method executed in an information processing device.
The information processing device is
It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The data processing unit
Executes the management information recording process for the management information recording table specified in the MPEG-2 TS format.
In the management information recording process,
It is an information processing method that selects the same type of management information as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format and records it in the management information recording table specified in the MPEG-2 TS format. ..

Further, the third aspect of the present disclosure is
It is a program that executes information processing in an information processing device.
The information processing device is
It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The program is installed in the data processing unit.
Executes the management information recording process for the management information recording table specified in the MPEG-2 TS format.
In the management information recording process,
The program is in a program that selects management information of the same type as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format and records the management information in the management information recording table specified in the MPEG-2 TS format.

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

Still other objectives, features and advantages of the present disclosure will be clarified by more detailed description based on the examples of the present disclosure and the accompanying drawings described below. In the present specification, the system is a logical set configuration of a plurality of devices, and the devices of each configuration are not limited to those in the same housing.

According to the configuration of one embodiment of the present disclosure, a configuration is realized in which the management information specified in the MPEG-2 TS format is recorded without excess or deficiency when converting from the MMT format to the MPEG-2 TS format.
Specifically, for example, in the process of converting MMT format data into MPEG-2 TS format data, the same type of management information as the management information specified in the MPEG-2 TS format is selected from the management information recording table specified in the MMT format. Record in the management information recording table specified in the MPEG-2 TS format. If the data format of the management information specified in each format is different, the data format is converted to the data format specified in the MPEG-2 TS format and recorded.
With this configuration, when converting from the MMT format to the MPEG-2 TS format, a configuration is realized in which the management information specified in the MPEG-2 TS format is recorded without excess or deficiency.
It should be noted that the effects described in the present specification are merely exemplary and not limited, and may have additional effects.

It is a figure explaining the use configuration example of the information processing apparatus which executes the process of this disclosure. It is a figure explaining the process executed by an information processing apparatus. It is a figure explaining the MMT format. It is a figure explaining the image data storage configuration example according to the MMT format. It is a figure explaining the MPEG-2TS format. It is a figure explaining the MPEG-2TS format. It is a figure explaining the processing example which converts MMT format data into MPEG-2TS format data. It is a figure explaining the management information in the MMT format and the MPEG-2 TS format. It is a figure explaining the management information recording table in the MMT format and the MPEG-2 TS format. It is a figure explaining the data structure of the MPT (MMT package table) specified in the MMT format. It is a figure explaining the data structure of the PMT (program map table) specified in the MPEG-2 TS format. It is a figure explaining the record processing example of the management information for PMT (program map table) based on the management information recorded in MPT (MMT package table). It is a figure explaining the method of the record processing of the management information with respect to PMT (program map table). It is a figure explaining an example of the management information recording method P1 with respect to PMT (program map table). It is a figure explaining an example of the management information recording method P1 with respect to PMT (program map table). It is a figure explaining an example of the management information recording method P2 for PMT (program map table). It is a figure explaining the TS remultiplexing processing condition at the time of format conversion and the recording processing example of management information. It is a figure explaining an example of the management information recording method P3 with respect to PMT (program map table). It is a figure explaining an example of the management information recording method P4 with respect to PMT (program map table). It is a figure explaining an example of the management information recording method P5 for PMT (program map table). It is a figure explaining an example of the management information recording method P6 for PMT (program map table). It is a figure explaining the data structure of the SIT (selection information table) defined in the MPEG-2 TS format. It is a figure explaining the record processing example of the management information for SIT (selection information table) based on the management information recorded in the management information recording table of MMT format data. It is a figure explaining the method of the record processing of the management information with respect to SIT (selection information table). It is a figure explaining an example of the management information recording method S1 with respect to SIT (selection information table). It is a figure explaining an example of the management information recording method S2 with respect to SIT (selection information table). It is a figure explaining an example of the management information recording method S3 with respect to SIT (selection information table). It is a figure explaining an example of the management information recording method S4 with respect to SIT (selection information table). It is a figure explaining an example of the management information recording method S5 with respect to SIT (selection information table). It is a figure explaining an example of the management information recording method S6 with respect to SIT (selection information table). It is a figure explaining an example of the management information recording method S7 with respect to SIT (selection information table). It is a figure explaining the configuration example of the information processing apparatus which executes a format conversion. It is a figure explaining the structure and processing 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 configuration example of the information processing apparatus applied to the processing of this disclosure.

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 explanation will be given according to the following items.
1. 1. Configuration example of communication system 2. About MMT (MPEG Media Transport) format 3. About MPEG-2 TS format 4. Format conversion process from MMT format data to MPEG-2 TS format data 5. 6. Example of recording processing of management information for PMT (program map table) executed during format conversion processing. Example of recording processing of management information for SIT (selection information table) executed during format conversion processing 7. About the configuration of the information processing device that executes the format conversion process 8. Management information recording processing sequence associated with format conversion executed by the information processing device 8-1. About the whole sequence of management information recording processing sequence accompanying the format conversion executed by the information processing device 8-2. Program map table (PMT) generation processing sequence 8-3. About the generation processing sequence of the selection information table (SIT) 9. About the configuration example of the information processing device 10. Summary of the structure of this disclosure

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

The data recorded on the media by the information processing apparatus 30 and the data re-distributed to other devices are, for example, transmission contents provided by a transmission device 20 such as a broadcasting station (broadcast server) 21 or a data distribution server 22. Specifically, it is a broadcast program or the like provided by a television station.
These transmitted contents are transmitted from the transmitting device 20 to the information processing device 30 via a broadcast wave or a network such as the Internet.

The information processing device 30 is, for example, a BD recorder 31, a television 32, a PC 33, a mobile terminal 34, etc. These information processing devices are, for example, a BD (Blu-ray (registered trademark) Disc) 41, an HDD (hard disk) 42. , Various media such as a flash memory 43 are attached, and data recording processing for these media and data reproduction processing from the media are executed.
Further, the information processing device 30 also includes a device that executes data redistribution to other devices. For example, a device such as a home server that executes 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 a data storage method and transmission method for transmitting coded data such as images (Video), audio (Audio), subtitles (Subtitles), etc., which are content composition data, via broadcast waves or networks. ing. It defines so-called container formats and transport formats.

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

The MMT format data 50 provided by the transmission device 20 to the information processing device 30 includes various reproduction target data such as images, sounds, and subtitles, as well as various guidance information such as program guides, notification information, control information, and attribute information. Contains management information.

The information processing device 30 records the MMT format data received from the transmitting device 20 on various information recording media (media) such as a BD 41, an HDD (hard disk) 42, and a flash memory 43. Alternatively, it can be redistributed to other devices.
The information processing device 30 itself that receives the MMT format data 50 can interpret the received MMT format data and perform reproduction processing and recording processing, but many current devices other than the information processing device 30 are available. , Does not have a processing function for MMT format data, for example, a data processing function such as data recording, reproduction, and communication.

Currently, the format used in many devices for data recording on an information recording medium (media) and as a data transfer format is the MPEG-2 TS format.
As mentioned above, for example, DLNA (Registered Trademark) (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. Etc., the standard of data communication processing using the MPEG-2 TS format is defined.

As described above, the MPEG-2 TS format is currently used in many devices as a format for data recording and data transfer for information recording media (media), and many current playback devices and communication devices are MMT format data. Cannot be processed.

Although the information processing apparatus 30 shown in FIG. 1 can interpret and process the MMT format, the information processing apparatus 30 records the MMT format data in the current situation where many other devices cannot interpret the MMT format. Even if the data 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).
Further, even in the device that has received the redelivery data of the MMT format data from the information processing apparatus 30, it becomes impossible to correctly reproduce or record the received MMT format data.

In order to use the MMT format data distributed from the broadcasting station in the future with the current equipment capable of processing only the MPEG-2 TS format data, the information processing apparatus 30 uses the MMT format data distributed from the broadcasting station or the like. It is necessary to perform processing such as converting to MPEG-2 TS format data, recording it on an information recording medium such as BD or flash memory, or redistributing it to other network-connected devices.

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

If recording processing or redistribution is executed with the MMT format data as it is, a reproduction device such as a current BD player, that is, a reproduction device that executes a reproduction process to which a reproduction program for reproducing MPEG-2 TS format data is applied. Cannot be played.

The MMT format data 50 includes, for example, a large amount of management information such as control information and attribute information related to contents such as images, sounds, and subtitles.
The information processing apparatus 30 needs to extract these 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, sounds, and subtitles as management information according to the MPEG-2 TS format, and recording or redistributing it on an information recording medium (media). , Current equipment that can process only MPEG-2 TS format data can refer to the management information specified in the MPEG-2 TS format, and can correctly perform processing such as playback, recording, and transfer of MPEG-2 TS format data. can.

[2. About MMT (MPEG Media Transport) format]
As described above, the data transmission from the transmission device 20 to the information processing device 30 is executed according to the MMT (MPEG Media Transport) format.
The MMT format is encoding when coded data, which is content composition data such as image (Video), audio (Audio), and subtitle (Subtitle), is stored in a recording medium (media) or transmitted via a broadcast wave or a network. It is a format that defines the data storage format and transmission method for data.
The MMT (MPEG Media Transport) format will be described with reference to FIG. 3 and the following.

FIG. 3 is a diagram showing a stack model in MMT format.
In the MMT stack model shown in FIG. 3, the bottom layer has a physical layer (PHY). The physical layer is divided into a broadcast (Broadcasting) layer that performs broadcasting-related processing and a broadband (Broadband) layer that performs network-based processing.
MMT enables processing using two communication networks, a broadcasting system and a network system.

As an upper layer of the physical layer (PHY), there is a TLV (Type Length Value) layer. The TLV is a format specification layer that defines a multiplexing method for IP packets. A plurality of IP packets are multiplexed and transmitted as TLV packets. The TLV-SI (Signaling Information) is a transmission layer of signaling information according to the TLV format.

The signaling information is composed of setting information required for receiving contents (programs) on the information processing apparatus 30 side, guidance information such as a program guide, notification information, and management information such as control information.
The signaling information stored in the TLV packet for which processing is 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 uppermost layer. be.

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 regulates transmission in which a UDP packet is stored 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 case where the MMTP packet is stored in the IP packet and transmitted and the method where the data is transmitted as the IP packet by using the File delivery method, which is a data transmission method that does not use the MMTP packet, can be used together.

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

The signaling information (MMT-SI) is signaling information transmitted by an MMTP packet, and is setting information required for receiving contents (programs) on the information processing apparatus 30 side, guidance information such as a program guide, and notification. It is composed of information, control information, etc.

The time information (NTP: Network Time Protocol) is absolute time information, which is directly stored in a UDP packet and transmitted.
Other data services (Data service) that distribute data, content download (Contentdownload, etc.) have a configuration that can be distributed by using a file distribution method (File delivery method) different from MMT.

As shown in FIG. 3, signaling information (MMT-SI) and applications including images, sounds, subtitles, and various notification and control information 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 payrot (c) MMTP packet (d) TLV packet

(D) The TLV packet is a packet transmitted via a broadcast wave, and each header information of the UDP header, the IP header, and the 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, an image (V), an audio (A), a subtitle (S), a signaling information stored in an MMTP packet (MMT-SI), a signaling information transmitted in a TLV packet (TLV-SI), and the like. Any one type of data is stored in a separate TLV packet.

An example of the TLV payrot, which is the payload of the TLV packet, is the MMTP packet shown in FIG. 4 (c).
The MMTP packet shown in FIG. 4C is composed of 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), subtitle (S), signaling information (MMT-SI) stored in an MMTP packet, or any one of these types of data is stored in an individual MMTP packet. Will be done.

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

As shown in FIG. 4A, the data unit stores image data and various parameters as described below.
AU Delimiter (Access Unit Delimiter)
SPS (Sequence Parameter Set)
PPS (Picture Parameter Set)
SEIs (Supplemental Enhanment 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 GOP (Group of Pictures) as a so-called coding / decoding processing unit.

In this way, for example, the image data is divided into the parameters defined in the MMT format and the image configuration data as shown in FIG. 4A, stored in the MMTP payload shown in FIG. 4B, and shown in FIG. 4 (b). It is configured as the MMTP packet shown in c).
Further, 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.

For each data such as voice and subtitles and each data of MMT-SI, MMTP packets and TLV packets for each data type are set and transmitted.
The TLV-SI is stored in the TLV packet and transmitted without being stored in the MMTP packet.

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

On the other hand, the MPEG-2 TS format is widely used as a data storage and transmission format for current broadcasting and data recording for information recording media.
Similar to the MMT format, the MPEG-2 TS format also stores coded data, which is content composition data such as images (Video), audio (Audio), and subtitles (Subtitle), in a recording medium (media), or stores broadcast waves and networks. It is a format that defines a data storage format (container format) such as coded data and a transmission format (transport format) when transmitting via.
Hereinafter, this MPEG-2 TS format will be described.

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

A case where the MPEG-2 TS format is recorded for BD (Blu-ray (registered trademark) Disc) will be described with reference to FIG. 5 and below.
As shown in FIG. 5, the MPEG-2 TS format of the case of recording to BD (Blu-ray (registered trademark) Disc) has the following features.
As shown in FIG. 5A, the MPEG-2 TS 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 consists of 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. In the payload of one TS packet, coded data of any one type of data such as image and voice, or control information such as attribute information is stored.
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 elemental stream (PES)) that stores the elementary stream (ES) that is encoded data such as images and voice, 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, for example, 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. The information processing device that executes the processing for the TS packet first refers to the PMT and confirms and confirms the PID corresponding to the data type such as management information such as image, voice, subtitle, other control information and attribute information. Received packets are separated by data type based on the PID corresponding to the data type, and processing is performed according to each data type.

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

The detailed configuration 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 data are 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
(H) Continuity counter
(I) Adaptation field

Next, with reference to FIG. 6, an example of data stored in a transport packet (TS packet), which is a component of the transport stream file, will be described.
FIG. 6 (D) transport packet (TS packet) corresponds to the transport packet (TS packet) shown in FIG. 5 (D).

The TS packet has a header (TP header) and a payload part. In the payload of one TS packet, coded data of any one type of data such as image and voice, or control information such as attribute information is stored.
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 elemental stream (PES)) that stores the elementary stream (ES) that is encoded data such as images and voice, a PES header that stores playback time information, and content. Attribute information, control information, etc. corresponding to are stored.

As described above, the management information such as attribute information and control information stored in the payload of the TS packet is specifically, for example, information called PSI / SI (Program Specific Information).
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. Format conversion process from MMT format data to MPEG-2 TS format data]
Next, an example of the format conversion process from the MMT format data to the MPEG-2 TS format data executed by the information processing apparatus 30 shown in FIGS. 1 and 2 will be described with reference to FIGS. 7 and 2.

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

Partial TS format data is a format defined as MPEG-2 TS format data for recording or redistribution on an information recording medium (media), and is a format defined by the Association of Radio Industries and Businesses (ARIB), which defines standards for digital broadcasting. It is a format developed by Radio Industries and Businesses).

The partial TS format data 60 extracts playback target data such as images, sounds, and subtitles from full-format MPEG-2 TS format data, and management information such as control information required for playback processing of these playback target data. This format is defined by the Radio Industry Association (ARIB) as a format that reduces the amount of data suitable for media recording and transfer processing.
As shown 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 of generating partial TS format data 60 by format conversion, but a configuration for generating full format MPEG-2 TS format data based on MMT format data 50 and a partial TS. The processing of the present disclosure is also applicable when generating TS format data having a data structure different from that of the format data 60.
That is, the partial TS format is a form of the MPEG-2 TS format, and the MPEG-2 TS format in the following description also includes the partial TS format.

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

With reference to FIG. 8, 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.
In (1) MMT format data shown in FIG. 8, the following areas are set as management information recording areas as shown as (11) management information under (1) MMT format data.
TLV signaling information (TLV-SI)
MMT signaling information (MMT-SI)

As described above with reference to FIG. 3, the signaling information includes setting information required for receiving contents (programs, etc.) on the information processing apparatus 30 side, guidance information such as a program guide, and notification information. It is composed of management information such as control information.
The signaling information stored in the TLV packet for which processing is generated in the TLV layer is the TLV signaling information (TLV-SI), and the signaling information stored in the MMTP packet, which is a packet generated according to the MMT protocol, is in the uppermost layer. It is MMT signaling information (MMT-SI) which shows.

The two types of management information (TLV-SI, MMT-SI) shown in FIG. 8 (11) are specifically, as shown in FIG. 8 (12), a plurality of tables (TLV-NIT, MH-BIT). ..., MPT, ...).
In these plurality of tables, various management information is further recorded as a descriptor as shown in FIG. 8 (13).

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

The descriptors include, for example, the following descriptors.
A descriptor (service descriptor) indicating the name of a broadcasting station indicating the provider of the content (program),
Descriptor (content descriptor) showing the content (performers, etc.) of the content (program)
Descriptor indicating copy tolerance information of content (program) (copy control descriptor)
Descriptor showing allowable viewing age information of content (program) (parrented information descriptor)
The above is an example of a descriptor. In addition to this, a large number of descriptors are specified in the MMT format, and various management information corresponding to each descriptor is recorded in the table.

On the other hand, in the partial TS (MPEG-2 TS) format data, as shown in FIG. 8 (2) partial TS (MPEG-2 TS) format data and (21) management information, the following management information recording area is used. Each area is set.
Program configuration information (PSI)
Service information (SI)

As described above with reference to FIGS. 5 and 6, a packet (packetized elemental stream (packetized elemental stream)) containing an elemental stream (ES) which is encoded data such as images and sounds is stored in the payload of the TS packet. PES)), a PES header storing playback time information, etc., attribute information corresponding to the 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, for example, a table such as a program map table (PMT: Program Map Table) and a selection information table (Selection Information Table).

Further, in these plurality of tables, various management information is further recorded as a descriptor as shown in FIG. 8 (23).
The management information recording structure for each descriptor is the same as the structure of each table in the MMT format.

However, the descriptor specified in the MMT format and the descriptor specified in the MPEG-2 TS format do not completely match.
That is, for example, the descriptors of the following settings are mixed.
(A) Descriptors with matching definitions in both formats,
(B) Descriptors with similar definitions in both formats,
(C) Descriptors defined in only one format,

FIG. 9 is a diagram showing an example of a table in which management information specified in the MMT format and the MPEG-2 TS 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) The TLV-NIT (network information table) is a table included in the TLV signaling information (TLV-SI), and is a table in which the combination of TLV streams and tuning information are 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 the broadcaster 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 explanation of the content. It's 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 and time related information such as the current date and time information is recorded.
(12f) The MPT (MMT package table) is a table included in the MMT signaling information (MMT-SI), and is a list of assets (images, sounds, subtitles, etc.) that are components of the content (program, etc.) package, and It is a table that records package configuration information such as location.

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

(22a) The PMT (program map table) is a table included in the PSI (Program Special Information) defined in the MPEG-2 TS format, and is data management information (control information, attribute information, etc.) of the data type (PID unit). It is a table that records.
The recorded information of this PMT (program map table) mainly corresponds to the recorded information of MPT (MMT package table) included in the MMT signaling information (MMT-SI) in the MMT format.

(22b) The SIT (selection information table) is a table included in SI (Service Information) defined in the MPEG-2 TS format, and is data management information (data management information) used when a partial TS (transport stream) is generated. It is a table that records control information, attribute information, etc.).
The recorded 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. About recording processing example of management information for PMT (program map table) executed during format conversion processing]
Next, an example of recording management information for the PMT (program map table) executed by the information processing apparatus in the format conversion process from the MMT format data to the MPEG-2 TS format data will be described.

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

Therefore, in the format conversion process from the MMT format data to the MPEG-2 TS 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) in the MMT format. It is read and this management information is recorded as the management information of PMT (program map table) included in the PSI specified in the MPEG-2 TS format.

FIG. 10 shows the data structure (syntax) of the MPT (MMT package table), which is one of the management information recording tables specified in the MMT format.
FIG. 10 shows the data structure, the number of bits, and the notation of the data recorded in the MPT.
In addition, "uimsbf" in the notation means "unsigned integer most significant bit first" notation.
“Bslbf” means “a bit string, the left bit is the head (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, sounds, subtitles, etc.) that are components of the content (program, etc.) package. It is a table that records package configuration information such as location.

As shown in FIG. 10, the following data recording areas are set in the MPT.
(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 composed of images, sounds, and various other package configuration data.
(2) In the first descriptor loop (MPT descriptor loop), the management information applied to the package specified by the identifier recorded in (1) the MMT package identifier is recorded.

(3) In the asset type, information indicating the types of data elements such as images, sounds, subtitles, applications, etc. that constitute the contents (programs) that are packages is recorded.
(4) In the second descriptor loop (asset descriptor loop), management information applied to the asset specified by the asset type recorded in (3) asset type is recorded. That is, if the asset type is an image, the management information corresponding to the image is recorded. If the asset type is voice, voice-enabled management information is recorded.

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

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

As shown in FIG. 11, the following data recording areas are set in the PMT.
(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. A program is, for example, one content (program), and a package is composed of images, sounds, and various other package configuration data.
(2) In the first descriptor loop (program descriptor loop), the management information applied to the program specified by the identifier recorded in (1) the program identifier is recorded.

(3) In the stream type, information indicating the type of data elements constituting the content (program) which is a program, such as images, sounds, subtitles, applications, and the like is recorded.
(4) In the second descriptor loop (ES descriptor loop), the management information applied to the ES (elementary stream) specified by the stream type recorded in (3) stream type is recorded. That is, if the stream type is an image, the management information corresponding to the image is recorded. If the stream type is voice, voice-compatible management information is recorded.

As described with reference to FIGS. 10 and 11.
MPT, which is a management information recording table compatible with MMT format,
PMT, which is a management information recording table compatible with the MPEG-2 TS format,
These tables have two layered management information recording loops having almost the same definition, and each loop records management information according to each layer.

That is, both the MMT format and the MPEG-2 TS format are configured as a table having the following two hierarchical descriptor loops, that is, a management information recording area.
(1) First descriptor loop that records management information for each content (program) (2) Second descriptor loop that records management information for each data type

However, as described above, the descriptor specified in the MMT format and the descriptor in the MPEG-2 TS format do not always have the same settings. That is, the descriptors of the following settings are mixed.
(A) Descriptors with matching definitions in both formats,
(B) Descriptors with similar definitions in both formats,
(C) Descriptors defined in only one format,

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

An example of recording processing of management information executed by the information processing apparatus 30 at the time of format conversion will be described with reference to FIGS. 12 and below.
FIG. 12 shows the following two tables side by side.
(1) MPT (MMT package table) specified in MMT format
(2) PMT (program map table) specified in MPEG-2 TS format
These are the tables described with reference to FIGS. 10 and 11.

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

However, not all of them match, and it is necessary to selectively apply various different methods and record the management information in the PMT (program map table) specified in the MPEG-2 TS format.
12 and 13 are diagrams illustrating the plurality of methods.
The methods P1 to P3 shown in FIGS. 12 and 13 are methods for recording management information such as a descriptor for the recording area of the first descriptor (describer) of the PMT (program map table) specified in the MPEG-2 TS format.
Further, the methods P4 to P6 shown in FIGS. 12 and 13 are methods for recording management information such as a descriptor for the recording area of the second descriptor (descriptor) of the PMT (program map table) specified in the MPEG-2 TS format. ..

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

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

(Management information recording method P2)
The method P2 newly defines an MPEG-2 TS format descriptor corresponding to the "MH-xxxx descriptor" recorded in the MPT descriptor area which is the first descriptor of the MPT, and further records it as necessary. Alternatively, make modifications according to the conditions of redelivery, and add the converted descriptor and the management information corresponding to that descriptor to the first descriptor loop (1st loop) of the PMT (program map table) specified in the MPEG-2 TS format. It is a method of recording.

(Management information recording method P3)
In the method P3, the first descriptor of the PMT (program map table) specified in the MPEG-2 TS format is executed according to the execution mode of the TS (transport stream) remultiplexing process specified in the MPEG-2 TS format, which is 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 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 methods P1 to P3 is the first descriptor loop (program descriptor loop) of the PMT (program map table) specified in the MPEG-2 TS format. Management information for each program (program, etc.) is recorded in this first descriptor loop (program descriptor loop).
Therefore, in the methods P1 to P2, the management information acquired from the management information storage table (MPT) in the MMT format is the management information for each program.

Next, methods P4 to P6, which are methods for recording management information such as descriptors for the recording area of the second descriptor loop (ES descriptor loop) of the PMT (program map table) specified in the MPEG-2 TS 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) of the MMT format is converted into a descriptor format defined in the MPEG-2 TS format, specifically, for example, 8. Converted to the bit descriptor format, modified according to the recording or redistribution conditions as necessary, and added to the second descriptor loop (2nd loop) of the PMT (program map table) specified in the MPEG-2 TS format. It is a method to record the converted descriptor and the 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 of the same stream type (stream_type) as the asset type (asset_type) of the original MPT (MMT). It is necessary to set it to the position.

(Management information recording method P5)
Method P5 newly defines an MPEG-2 TS format descriptor corresponding to the "MH-xxxx descriptor" recorded in the recording area of the MMT format asset descriptor (second descriptor), and further, if necessary. The converted descriptor and its descriptor correspondence are added to the second descriptor loop (2nd loop) of the PMT (program map table) specified in the MPEG-2 TS format, with modifications according to the recording or redistribution conditions. It is a method to record the management information of.

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

(Management information recording method P6)
The method 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) specified in the MPEG-2 TS format executed at the time of format conversion. It is a method to generate a new descriptor to be recorded in and record the new descriptor and the management information corresponding to the descriptor in the second descriptor loop (2nd loop) of the PMT corresponding to the stream type (Program_type). ..

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

In this way, as a management information recording method for the PMT (program map table) specified in the MPEG-2 TS format,
Methods P1 to P3, which are methods for recording management information such as descriptors for the recording area of the first descriptor loop (program descriptor loop) of the PMT, and further.
Methods P4 to P6, which are methods for recording management information such as descriptors for the recording area of the second descriptor loop (ES descriptor loop) of the PMT.
There are these recording methods.
The information processing apparatus that executes the format conversion switches each of these methods at any time and performs a process of recording various management information in the PMT (program map table) specified in the MPEG-2 TS format.

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

(Specific example of management information recording method P1)
First, a specific example of the management information recording method P1 will be described with reference to FIG.
In the method P1, the "MH-xxxx descriptor" recorded in the MPT descriptor area, which is the first descriptor in the MPT (MMT package table) of the MMT format, is converted into a descriptor format defined in the MPEG-2 TS format. Specifically, for example, it is converted into an 8-bit descriptor format, modified according to the recording or redistribution conditions as necessary, and the first descriptor loop of the PMT (program map table) specified in the MPEG-2 TS format is specified. This is a method of recording the converted descriptor and the management information corresponding to the descriptor in (1st loop).

FIG. 14 shows the following two data.
(1) MH-emergency information descriptor which is the recorded information of MPT specified in MMT format (2) Emergency information descriptor which is recorded information of PMT specified in MPEG-2 TS format It is management information related to signal transmission / reception and output processing according to the specified emergency warning signal, and is used when performing emergency warning broadcasting.

The information processing apparatus that executes the format conversion from the MMT format to the MPEG-2 TS format displays the MH-emergency information descriptor, which is the recorded information of the MPT (MMT) shown in FIG. 14 (1), in FIG. 14 (2). It is converted into an emergency information descriptor which is the recorded information of the PMT (MPEG-2TS) shown and recorded.
Specifically, as shown in FIG. 14A, a descriptor tag (descriptor_tag) indicating an emergency information descriptor is specified from 16-bit data (0x8007) specified by MPT (MMT) to PMT (MPEG-2TS). 8 bit data (0xFC) is converted and recorded.

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

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

The information processing device 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, defined in the MPEG-2 TS format similar to the emergency information descriptor 8 The emergency information descriptor of the bit tag is selected and recorded in the first descriptor loop (1st loop) of the PMT (program map table) specified in the MPEG-2 TS 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 used as the PMT (program) specified in the MPEG-2 TS 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 the recorded information of MPT specified in MMT format (2) Digital copy control descriptor which is recorded information of PMT specified in MPEG-2 TS format In addition, the content copy control descriptor and digital copy control The descriptor is a descriptor showing information that controls the copy generation in the digital recording device, and when digital recording is assumed, for example, information about copying by a broadcasting station or a copyright holder, or maximum transmission. Used to convey the rate to digital recording equipment.

The information processing apparatus that executes the format conversion from the MMT format to the MPEG-2 TS format uses the content copy control descriptor, which is the recorded information of the MPT (MMT) shown in FIG. 15 (1), as the PMT shown in FIG. 15 (2). It is recorded as a digital copy control descriptor which is the 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 the MPT (MMT) is converted from 16 bits (0x8038) specified by MPT (MMT) to 8 bits (0xc1) specified by PMT (MPEG-2TS) and recorded.
(B) Regarding the digital recording control data (digital_recording_control_data), if the MPT (MMT) recording data is set to be copyable for only one generation (b10), copy is prohibited when the format conversion data is recorded (copied) on the media. Correct the setting (b11) and record.
(C) For the component tag (component_tag), the tag value is converted from 16 bits (MMT standard) to 8 bits (MPEG-2 TS standard) and recorded according to the replacement content of the stream identifier.

When the management information recorded in the management information recording table (MPT) specified 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 management information recording table (MPT) specified in the MPEG-2 TS format as the management information specified in the MPEG-2 TS format.

As described above, in the method P1, the “MH-xxxxxx descriptor” recorded in the MPT descriptor area, which is the first descriptor in the MPT (MMT package table) of the MMT format, is defined in the MPEG-2 TS format. Converted to a descriptor format, specifically an 8-bit tag descriptor format, modified according to the recording or redistribution conditions as necessary, and PMT (program map table) specified in the MPEG-2 TS format. This is a method of recording the converted descriptor and the management information corresponding to the descriptor in the first descriptor loop (1st loop) of.

(Specific example of management information recording method P2)
Next, a specific example of the management information recording method P2 will be described with reference to FIG.
The method P2 newly defines an MPEG-2 TS format descriptor corresponding to the "MH-xxxx descriptor" recorded in the MPT descriptor area which is the first descriptor of the MPT, and further records it as necessary. Alternatively, make modifications according to the conditions of redelivery, and add the converted descriptor and the management information corresponding to that descriptor to the first descriptor loop (1st loop) of the PMT (program map table) specified in the MPEG-2 TS format. It is a method of recording.

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

FIG. 16 shows the following two data.
(1) Management information such as emergency news descriptors that are recorded information of MPT specified in MMT format (2) Management information such as emergency news descriptors newly defined as recorded information of PMT specified in MPEG-2 TS 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 news bulletins, extraordinary news, and breaking news supermarkets.

The emergency news descriptor is defined in the MPT specified in the MMT format, and is set so that management information corresponding to the emergency news can be recorded.
However, the PMT specified in the MPEG-2 TS format does not have the definition of this emergency news descriptor, and is not set to record the management information for emergency news correspondence.
In such a case, the information processing apparatus that executes the format conversion newly generates a new PMT (MPEG-2TS) -specified descriptor showing the same management information as the MPT-specified descriptor, and PMT (program map table). ) In the first descriptor loop (1st loop).

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

In the MPEG-2 TS format, a plurality of 8-bit data are defined in advance as descriptor codes indicating various management information, but the code in the range of 0x80 to 0xBF is free management information as a free code. 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 the code (8-bit data) in the range of 0x80 to 0xBF, and sets the selection code as a new PMT (PMT) indicating the same management information as the MPT-specified descriptor. MPEG-2 TS) Can be set as a default 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. 17 and 18.
In the method P3, the first descriptor of the PMT (program map table) specified in the MPEG-2 TS format is executed according to the execution mode of the TS (transport stream) remultiplexing process specified in the MPEG-2 TS format, which is 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 management information corresponding to the descriptor and the descriptor is recorded in the first descriptor loop (1st loop) of the PMT.

When converting MMT format data to MPEG-2 TS format data and performing transfer processing such as recording or retransmission on an information recording medium (media), for example, the code of data such as images and voice included in the MMT format data. It is possible to generate TS stream data (remultiplexed data) constituting the MPEG-2 TS format data by changing the conversion mode.
It is also possible to generate TS stream data (remultiplexed data) that constitutes MPEG-2 TS format data as it is without changing the encoding mode of data such as images and sounds included in MMT format data. ..

In this way, the information processing apparatus that converts MMT format data into MPEG-2 TS format data and executes transfer processing such as recording or retransmission on an information recording medium (media) uses various coded data as a component. It is possible to generate MPEG-2 TS format data.
The information processing apparatus needs to record the coding processing mode of images, sounds, etc. executed at the time of format conversion in each management information recording table (PMT or the like) specified in the MPEG-2 TS format as management information.

It should be noted that the information processing apparatus that performs the conversion process can determine the coding processing mode of the image, sound, etc. to be executed at the time of format conversion, and is not recorded in the management information recording table (MPT, etc.) in the MMT format data. ..
Therefore, the information processing apparatus newly generates management information indicating the coding processing mode of the image, voice, etc. executed at the time of format conversion, and a new description indicating that the generated management information is the coding processing mode information. Together with the child, the process of recording in the management information recording table (PMT, etc.) specified in the MPEG-2 TS format is executed.

FIG. 17 shows an example of coding processing modes such as images and sounds that can be executed at the time of format conversion, a descriptor to be recorded in the management information recording table (PMT / SIT) specified in the MPEG-2 TS format, and a specific example of management information. It is a figure which shows the correspondence relation of.

Shown in item (A) of FIG.
(A) TS (Transport Stream) Remultiplexing Processing Condition This item (A) is a coding processing mode for images, sounds, etc. that can be executed at the time of format conversion, and shows the following three examples.
(1) TS remultiplexing without conversion (2) Image conversion TS remultiplexing recording processing (3) Image / audio conversion TS remultiplexing processing

(1) The TS remultiplexing process without conversion separates the image, sound, etc. from the multiplexed stream data of the image, sound, etc. included in the MMT format data, and does not change the coding mode of the image, sound, etc. It is a process of generating a multiplexed TS stream storing images, sounds, etc. constituting the MPEG-2 TS format in the same coding mode.
The mode name should be called MPEG-2 TS for ISDB-S3 mode.

(2) Image conversion The TS remultiplexing recording process separates images, sounds, etc. from the multiplexed stream data of images, sounds, etc. included in the MMT format data, changes the encoding mode of only the images, and changes the coding mode of the voice. This is a process of generating a multiplexed TS stream containing images, sounds, etc. constituting the MPEG-2 TS format without changing the coding mode.
The mode name should be called MPEG-2 TS for ISDB-S3 Transcode mode.

(3) Image / audio conversion The TS remultiplexing process separates the image, audio, etc. from the multiplexed stream data of the image, audio, etc. included in the MMT format data, changes the coding mode of the image, and further changes the audio. This is a process of generating a multiplexed TS stream containing images, sounds, etc. constituting the MPEG-2 TS format by changing the coding mode of.
The mode name is called HDNV compact TS mode.

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

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

(D1) The setting of the descriptor and the like of the PMT first descriptor loop (1st loop) is the setting of recording the management information such as the 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 the management information such as the 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 and the like of the SIT first descriptor loop (1st loop) is set to record the management information such as the partial transport stream descriptor.
This management information is set to record, for example, information necessary for recording and transferring partial TS.

Further, (2) the information processing apparatus that executes the format conversion in the setting of the image conversion TS remultiplexing process performs the following processing.
(B) In the conversion processing mode of the image stream (Video ES), the image in the MMT (Video ES (HEVC 4K / 8K, etc.)) is converted in size to 2Kor4K, converted (transcoded) to HEVCor MPEG-4 AVC, and TS. This is an embodiment in which the multiplexing process is executed.
(C) The conversion processing mode of the audio stream (Audio ES) is an embodiment in which the TS multiplexing process is executed without converting the audio (Audio ES) in the MMT.

(D1) The setting of the descriptor and the like of the PMT first descriptor loop (1st loop) is the setting of recording the management information such as the 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 the management information such as the 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
In addition, "HDMV_video_registration_descriptor" is a descriptor indicating that TS includes an MPEG-4 AVC video stream.
"Transcode_mode_registration_descriptor" is a descriptor indicating that the ES has been transcoded.

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

Further, (3) the information processing apparatus that executes the format conversion in the setting of the image / audio conversion TS remultiplexing process performs the following processing.
(B) In the conversion processing mode of the image stream (Video ES), the image in MMT (Video ES (HEVC 4K / 8K, etc.)) is size-converted to 2K, converted (transcoded) to MPEG-4 AVC, and TS. This is an embodiment in which the multiplexing process is executed.
(C) In the conversion processing mode of the audio stream (Audio ES), the audio in the MMT (Audio ES (MPEG-4 AAC 22.2ch, etc.)) is converted to 2ch or 5.1ch and converted to AC-3 (trans). Code) to execute the TS multiplexing process.

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

(D2) The setting of the descriptor and the like of the MT second descriptor loop (2nd loop) 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
Is.
In addition, "HDMV_video_registration_descriptor" is a descriptor indicating that TS includes an MPEG-4 AVC video stream.
"AC-3_registration_descriptor" is a descriptor indicating that the HDMV-TS contains an AC-3 audio stream.

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

The information processing device is like this
(A) TS (transport stream) remultiplexing processing condition That is, the coding processing mode of images, sounds, etc. that can be executed at the time of format conversion is
(1) TS remultiplexing without conversion (2) Image conversion TS remultiplexing recording processing (3) Image / audio conversion TS remultiplexing processing Depending on which of the above (1) to (3) is used.
The images and sounds shown in FIGS. 17B to 17C are processed.
Recording processing of management information such as descriptors for PMT and SIT shown in FIGS. 17 (D) to 17 (E) is performed.

FIG. 18 shows the table shown in FIG.
(3) Image / audio conversion When format conversion is executed with the TS remultiplexing processing settings,
(D1) A setting example of a descriptor of the PMT first descriptor loop (1st loop) and the like is shown.
That is, a recording example of 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. 18A, streams such as images (Video) and audio (Audio) in the MMT format data are format-converted (transcoded) to generate remultiplexed data of the MPEG-2 TS stream. , When recording or redistributing to media, it is necessary to record information (format information, frame rate information, etc.) regarding the newly generated MPEG-2 TS compatible stream.
Since this information is not recorded as management information in each table of MMT format (MPT, etc.), the device that has performed the format conversion records it in the management information recording table (PMT, etc.) of MPEG-2 TS. Generate and record new descriptors and management information.

* The descriptor tag (descriptor_tag) is set to 8-bit data (0x05). For example, a code matching the ISO / IEC1318-1 standard code is recorded.
* Set the descriptor length (descriptor_length) to 4 bits.
* The format identifier (format_identifier) is set to 0x48 44 4D 56. This is an example of recording a code corresponding to the ASCII code meaning HDMV.

Next, specific examples of methods P4 to P6, which are methods for recording management information such as descriptors for the recording area of the second descriptor loop (ES descriptor loop) of the PMT (program map table) specified in the MPEG-2 TS 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) of the MMT format is converted into a descriptor format defined in the MPEG-2 TS format, specifically, for example, 8. Converted to the bit tag descriptor format, modified according to the recording or redistribution conditions as necessary, and added to the second descriptor loop (2nd loop) of the PMT (program map table) specified in the MPEG-2 TS format. , It is a method to record the converted descriptor and the management information corresponding to the descriptor.

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 it in the position of the type (stream_type).

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

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

As described above, the MMT format descriptor tag (descriptor_tag) is defined as 16-bit data, and the MPEG-2 TS format descriptor tag (descriptor_tag) 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 the MPEG-2 TS format. ..
In this way, if there is a descriptor definition indicating the same management information in any format, the defined descriptor is used.

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

In the recording process of 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) specified in the MPEG-2 TS format is the source. It is necessary to confirm that it is the same type (program_type) as the asset type (asset_type) of the MPT (MMT package table) of 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-2 TS format descriptor corresponding to the "MH-xxxx descriptor" recorded in the recording area of the MMT format asset descriptor (second descriptor), and further, if necessary. The converted descriptor and its descriptor correspondence are added to the second descriptor loop (2nd loop) of the PMT (program map table) specified in the MPEG-2 TS format, with modifications according to the recording or redistribution conditions. It is a method to record the management information of.

FIG. 20 shows the following two data.
(1) Management information such as video component descriptor which is the recording information of MPT specified in MMT format (2) Management information such as video component descriptor newly defined as recording information of PMT specified in MPEG-2 TS 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 so that management information corresponding to the video component can be recorded.
However, the PMT specified in the MPEG-2 TS format does not have the definition of this video component descriptor, and is not set to record the management information corresponding to the video component.
In such a case, the information processing apparatus that executes the format conversion newly generates a new PMT (MPEG-2TS) -specified descriptor showing the same management information as the MPT-specified descriptor, and PMT (program map table). ) In the second descriptor loop (2nd loop).

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

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

Also in the processing of this method P5, as in the above-mentioned method P4, in the recording processing of management information such as the descriptor, the second descriptor loop (2nd loop) of the PMT (program map table) specified in the MPEG-2 TS format is specified. ), It is necessary to confirm that the stream type (program_type) is the same type (program_type) as the asset type (asset_type) of the 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 method 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) specified in the MPEG-2 TS format executed at the time of format conversion. It is a method to generate a new descriptor to be recorded in and record the new descriptor and the management information corresponding to the descriptor in the second descriptor loop (2nd loop) of the PMT corresponding to the stream type (Program_type). ..

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

FIG. 21 is an example of “setting of the descriptor and the like of the (D2) MT second descriptor loop (2nd loop)” of FIG. 17 described above, for example.
FIG. 17 (2) Image conversion TS remultiplexing recording processing (3) Image / audio conversion TS remultiplexing processing Management information including a descriptor corresponding to an image when format conversion is executed with any of these settings. This 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 are recorded in this data.
These information are information about the image included in the MPEG-2 TS format data after the format conversion.
These information are the information grasped by the information processing apparatus that has converted the MMT format data to the MPEG-2 TS format data, and the information shown in FIG. 21 is referred to as PMT according to the executed format conversion processing mode. 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 also recorded for audio, subtitles, and the like.

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

[6. About recording processing example of management information for SIT (selection information table) executed in format conversion processing]

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

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

Therefore, in the format conversion process from the MMT format data to the MPEG-2 TS format data, the information processing apparatus uses the TLV-NIT included in the TLV signaling information (TLV-SI) in the MMT format and the MMT signaling information (MMT-SI). MH-BIT, MH-SDT, MH-EIT, MH-TOT included in, the management information recorded in these is read, and this management information is included in the SI specified in the MPEG-2 TS format SIT (selection information table). ) Is recorded as management information.

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

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

As shown in FIG. 22, the following data recording areas are set in the SIT.
(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 or the like) is recorded.

The recorded information of the SIT (selection information table) specified in the MPEG-2 TS format is mainly included in the TLV-NIT included in the TLV signaling information (TLV-SI) in the MMT format and in the MMT signaling information (MMT-SI). MH-BIT, MH-SDT, MH-EIT, MH-TOT, and these recorded information are supported. Therefore, in the conversion process from the MMT format to the MPEG-2 TS 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. It is read and this management information is recorded as the management information of SIT (selection information table) specified in the MPEG-2 TS format.

However, as described above, the descriptor specified in the MMT format and the descriptor in the MPEG-2 TS format do not always have the same settings. That is, the descriptors of the following settings are mixed.
(A) Descriptors with matching definitions in both formats,
(B) Descriptors with similar definitions in both formats,
(C) Descriptors defined in only one format,

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

An example of recording processing of management information executed by the information processing apparatus 30 at the time of format conversion will be described with reference to FIGS. 23 and below.
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) SIT (selection information table) specified in MPEG-2 TS format

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

Each of these methods will be described with reference to FIG. 24.
First, methods S1 to S3, which are methods for recording management information such as descriptors for the recording area of the first descriptor loop (transmission information descriptor loop) of the SIT (selection information table) specified in the MPEG-2 TS format, will be described.

(Management information recording method S1)
The method 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-2 TS definition, and reflects the management information in the MPEG-2 TS format. This is a method of recording the descriptor and the management information corresponding to the descriptor in the transmission information descriptor loop which is the first descriptor loop (1st loop) of the specified 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 the combination of TLV streams and tuning information are recorded. It is a table.
The information processing device that executes the format conversion reflects the management information recorded in this TLV-NIT (network information table) in the descriptor contents of the MPEG-2 TS definition, and the SIT (selection information table) specified in the MPEG-2 TS format. ) Is recorded in the transmission information descriptor loop, which is the first descriptor loop (1st loop).

(Management information recording method S2)
The method S2 is a management information storage table included in the MMT signaling information (MMT-SI), such as MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), and MH. -TOT (time offset table), the management information recorded in each of these tables is reflected in the descriptor contents of the MPEG-2 TS definition, and the first descriptor loop of the SIT (selection information table) specified in the MPEG-2 TS format. This is a method of recording a descriptor and management information corresponding to the descriptor 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 the broadcaster 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 that records content-related information such as the name of the content (program, etc.), the broadcast date and time, and the explanation of the content. ..
The MH-TOT (time offset table) is a table included in the MMT signaling information (MMT-SI), and is a table in which date and time related information such as the current date and time information is recorded.

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

(Management information recording method S3)
In the method S3, the first descriptor of the SIT (selection information table) specified in the MPEG-2 TS format is executed according to the execution mode of the TS (transport stream) remultiplexing process specified in the MPEG-2 TS format, which is 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 management information corresponding to the descriptor and the descriptor is recorded in the first descriptor loop (1st loop) of SIT.

The recording destination of the management information in these methods S1 to S3 is the first descriptor loop (transmission information descriptor loop) of the SIT (selection information table) specified in the MPEG-2 TS format. Management information for each transmission information unit is recorded in this first descriptor loop (transmission information descriptor loop).
Therefore, in the methods S1 to S2, the management information acquired from the management information storage table in the MMT format is the management information for each transmission information unit.

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

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

The information processing apparatus that executes the 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-2 TS definition, and defines the MPEG-2 TS format. It is recorded in the service information descriptor loop which is the second descriptor loop (2nd loop) of the SIT (selection information table) of.

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

(Management information recording method S5)
The method S5 is a management information storage table included in the MMT signaling information (MMT-SI), such as MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), and MH. -TOT (time offset table), "MH-xxxx descriptor" recorded in each of these tables is converted into a descriptor of MPEG-2TS definition, and the SIT (selection information table) specified in MPEG-2TS format is used. This is a method of recording the descriptor and the management information corresponding to the descriptor in the 2 descriptor loop (2nd loop).

The information processing apparatus that executes the format conversion defines the management information including the "MH-xxxx descriptor" recorded in the management information storage table included in the MMT signaling information (MMT-SI) in MPEG-2 TS. It is converted into a descriptor and recorded in the service information descriptor loop which is the second descriptor loop (2nd loop) of the SIT (selection information table) specified in the MPEG-2 TS format.

(Management information recording method S6)
The method S6 is a management information storage table included in the MMT signaling information (MMT-SI), such as MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), and MH. -TOT (time offset table), generate a new MPEG-2 TS definition descriptor corresponding to the "MH-xxx descriptor" recorded in each of these tables, and SIT (selection information table) specified in the MPEG-2 TS format. ) In the second descriptor loop (2nd loop), the descriptor and the management information corresponding to the descriptor are recorded.

This example is an example in which the MPEG-2 TS format specification descriptor corresponding to the MMT format specification descriptor does not exist.
The information processing apparatus that executes the format conversion generates a new MPEG-2 TS definition descriptor corresponding to the descriptor recorded in the management information storage table included in the MMT signaling information (MMT-SI), and generates a new MPEG-2 TS definition descriptor in the MPEG-2 TS format. Record in the service information descriptor loop which is the second descriptor loop (2nd loop) of the specified SIT (selection information table).

(Management information recording method S7)
The method 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) specified in the MPEG-2 TS format executed at the time of format conversion. It is a method to generate a new descriptor to be recorded in and record the new descriptor and the management information corresponding to the descriptor in the second descriptor loop (2nd loop) of the SIT corresponding to the stream type (Stream_type). ..

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) specified in the MPEG-2 TS format. Management information for each service information unit is recorded in this 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 the management information of the service information unit.

In this way, as a management information recording method for the SIT (selection information table) specified in the MPEG-2 TS format,
Methods S1 to S3, which are methods for recording management information such as descriptors for the recording area of the first descriptor loop (transmission information descriptor loop) of the SIT, and further.
Methods S4 to S7, which are methods for recording management information such as descriptors for the recording area of the second descriptor loop (service information descriptor loop) of SIT.
There are these recording methods.
The information processing apparatus that executes the format conversion switches each of these methods at any time and performs a process of recording various management information in the SIT (selection information table) specified in the MPEG-2 TS format.

Next, with reference to FIGS. 25 and 25, for a plurality of recording methods described with reference to FIGS. 23 and 24, that is, for the recording area of each descriptor loop of the SIT (selection information table) specified in the MPEG-2 TS format. Specific examples of the recording methods S1 to S7 for management information such as descriptors will be described.

(Specific example of management information recording method S1)
First, a specific example of the management information recording method S1 will be described with reference to FIG. 25.
The method 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-2 TS definition, and reflects the management information in the MPEG-2 TS format. This is a method of recording the descriptor and the management information corresponding to the descriptor in the transmission information descriptor loop which is the first descriptor loop (1st loop) of the specified SIT (selection information table).

FIG. 25 shows the following two data.
(1) TLV-NIT (network information table) specified in MMT format
(2) Network identification descriptor which is recorded information of SIT specified in MPEG-2 TS 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 are recorded.
Here, a network identifier (network_id) required for reception processing of a service (program or the like) is recorded.

The information processing apparatus that executes the format conversion from the MMT format to the MPEG-2 TS format is a network identifier (newwork_id) 16-bit data recorded in the TLV-NIT (network information table) specified in the MMT format shown in FIG. 25 (1). Is directly recorded as 16-bit data of the network identification descriptor (newwork_id) specified in SIT (MPEG-2TS) shown in FIG. 25 (2).

When the management information recorded in the management information recording table (SIT) specified 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 management information recording table (SIT) specified in the MPEG-2 TS format as the management information specified in the MPEG-2 TS format.

(Specific example of management information recording method S2)
Next, a specific example of the management information recording method S2 will be described with reference to FIG. 26.
The method S2 is a management information storage table included in the MMT signaling information (MMT-SI), such as MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), and MH. -TOT (time offset table), the management information recorded in each of these tables is reflected in the descriptor contents of the MPEG-2 TS definition, and the first descriptor loop of the SIT (selection information table) specified in the MPEG-2 TS format. This is a method of recording a descriptor and management information corresponding to the descriptor in (1st loop).

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

FIG. 26 shows the following two data.
(1) Recorded information of MH-TOT (time offset test table) specified in MMT format (2) Partial TS time descriptor which is recorded information of SIT specified in MPEG-2 TS 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 and time related information such as the current date and time information is recorded.
In the partial TS time descriptor (PartialTS time descriptor), which is the recorded information of the SIT specified in the MPEG-2 TS format, the time information of the event and the time information at the time of transmission are described.

These two data include common management information, and the information processing device that executes the format conversion uses the recorded information of MH-TOT (time offset table) included in the MMT signaling information (MMT-SI) and MPEG. -Generates the recorded information of the partial TS time descriptor (PartialTS time descriptor), which is the recorded information of the SIT specified in the -2TS format.

Specifically, for example, as shown in FIG. 26 (a), the 40-bit data of the [JST_time] field recorded in the MH-TOT in the MMT format (with the current date by 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 specified by MPEG-2 TS.

(Specific example of management information recording method S3)
Next, a specific example of the management information recording method S3 will be described with reference to FIG. 27.
In the method S3, the first descriptor of the SIT (selection information table) specified in the MPEG-2 TS format is executed according to the execution mode of the TS (transport stream) remultiplexing process specified in the MPEG-2 TS format, which is 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 management information corresponding to the descriptor and the descriptor is recorded in the first descriptor loop (1st loop) of SIT.

When converting MMT format data to MPEG-2 TS format data and performing transfer processing such as recording or retransmission on an information recording medium (media), for example, the code of data such as images and voice included in the MMT format data. It is possible to generate TS stream data (remultiplexed data) constituting the MPEG-2 TS format data by changing the conversion mode.
It is also possible to generate TS stream data (remultiplexed data) that constitutes MPEG-2 TS format data as it is without changing the encoding mode of data such as images and sounds included in MMT format data. ..

In this way, the information processing apparatus that converts MMT format data into MPEG-2 TS format data and executes transfer processing such as recording or retransmission on an information recording medium (media) uses various coded data as a component. It is possible to generate MPEG-2 TS format data.
The information processing apparatus needs to record the coding processing mode of images, sounds, etc. executed at the time of format conversion in each management information recording table (SIT or the like) specified in the MPEG-2 TS format as management information.

It should be noted that the information processing apparatus that performs the conversion process can determine the coding processing mode of the image, sound, etc. to be executed at the time of format conversion, and is not recorded in the management information recording table (MPT, etc.) in the MMT format data. ..
Therefore, the information processing apparatus newly generates management information indicating the coding processing mode of the image, voice, etc. executed at the time of format conversion, and a new description indicating that the generated management information is the coding processing mode information. Together with the child, the process of recording in the management information recording table (SIT, etc.) specified in the MPEG-2 TS format is executed.

The processing of this method S3 is the same processing as the processing of the method P3 described above 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 coding processing mode of images, sounds, etc. executed at the time of format conversion for converting MMT format data to MPEG-2 TS format data is recorded as management information in each management information recording table (SIT, etc.) specified in the MPEG-2 TS format. It is a process to do.

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

FIG. 27 is a specific example of a partial TS descriptor (Partial transport stream descriptor) which is recorded information of SIT specified in the MPEG-2 TS format. In this partial TS descriptor (Partial transport stream descriptor), information required for recording a 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 converted the MMT format data to the MPEG-2 TS format data, and records the data according to the executed format conversion processing mode.
As an example, for example, the peak rate (peak_rate) may be set as a specified value corresponding to BD-ROM. In this case, it is possible to determine that the packet has a BD-ROM compatible packet configuration.

(Specific example of management information recording method S4)
Next, a specific example of the management information recording method S4 will be described with reference to FIG. 28.
The method S4 is a management information storage table included in the MMT signaling information (MMT-SI), such as MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), and MH. -TOT (time offset table), the management information recorded in each of these tables is reflected in the descriptor contents of the MPEG-2 TS definition, and the second descriptor loop of the SIT (selection information table) specified in the MPEG-2 TS format. It 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 the MMT signaling information (MMT-SI) specified in the MMT format.
(2) Partial TS time descriptor which is the recorded information of SIT specified in MPEG-2 TS format.

The MH-EIT (event information table) specified in the MMT format is a table included in the MMT signaling information (MMT-SI), and is content-related information such as the name of the content (program, etc.), the broadcast date and time, and the explanation of the content. It is a table that records.
Further, in the partial TS time descriptor (PartialTS time descriptor) which is the recorded information of the SIT specified in the MPEG-2 TS format, the time information of the event and the time information at the time of transmission are described.

These two data include common management information, and the information processing device that executes the format conversion uses the recorded information of MH-EIT (event information table) included in the MMT signaling information (MMT-SI) to MPEG. -Generates the recorded information of the partial TS time descriptor (PartialTS time descriptor), which is the recorded information of the SIT specified in the -2TS format.

Specifically, for example, as shown in FIG. 28 (a), the 40-bit and 24-bit data of the [start_time] and [duration] fields recorded in the MH-EIT in the MMT format are converted into the SIT specified by MPEG-2 TS. The process of recording as 40-bit or 24-bit data in the [event_start_time] and [duration] fields of the partial TS time descriptor of 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. 29.
The method S5 is a management information storage table included in the MMT signaling information (MMT-SI), such as MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), and MH. -TOT (time offset table), "MH-xxxx descriptor" recorded in each of these tables is converted into a descriptor of MPEG-2TS definition, and the SIT (selection information table) specified in MPEG-2TS format is used. This is a method of recording the descriptor and the management information corresponding to the descriptor in the 2 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 the MMT signaling information (MMT-SI) specified in the MMT format (2) SIT specified in the MPEG-2 TS format. Short-format event descriptor, which is the recorded information of the event The short-form event descriptor is composed of an event name and data representing a short description of the event in text format.

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

(Specific example of management information recording method S6)
Next, a specific example of the management information recording method S6 will be described with reference to FIG.
The method S6 is a management information storage table included in the MMT signaling information (MMT-SI), such as MH-BIT (broadcaster information table), MH-SDT (service description table), MH-EIT (event information table), and MH. -TOT (time offset table), generate a new MPEG-2 TS definition descriptor corresponding to the "MH-xxx descriptor" recorded in each of these tables, and SIT (selection information table) specified in the MPEG-2 TS format. ) In the second descriptor loop (2nd loop), the descriptor and the management information corresponding to the descriptor are 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) specified in MMT format (2) Recorded information of SIT specified in MPEG-2 TS format Video component descriptor newly defined as

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

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

Specifically, as shown in FIG. 30 (a), a new SIT (MPEG-2 TS) -defined 8-bit descriptor (for example) corresponding to the MPT-specified 16-bit descriptor (0x8010) indicating the video component descriptor. Arbitrary use allowable free code (use any of 0x80 to 0xBF) is newly generated and recorded, and the management information corresponding to the video component is acquired from the MH-EIT (event information table) specified in the MMT format and SIT. Record in.

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

(Specific example of management information recording method S7)
Next, a specific example of the management information recording method S7 will be described with reference to FIG. 31.
The method 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) specified in the MPEG-2 TS format executed at the time of format conversion. It is a method to generate a new descriptor to be recorded in and record the new descriptor and the management information corresponding to the descriptor in the second descriptor loop (2nd loop) of the SIT corresponding to the stream type (Stream_type). ..

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

FIG. 31 is an example of “(E) Setting a descriptor and the like for the SIT (selection information table)” of FIG. 17 described above.
FIG. 17 (E) stipulates that management information such as a partial transport stream descriptor is recorded in any of the TS remultiplexing processing conditions (1) to (3).
That is, the information processing apparatus that has converted the MMT format data into the MPEG-2 TS format data is stored in the SIT (selection information table) that defines the coding processing mode of the image, voice, etc. after the format conversion as the management information in the MPEG-2 TS format. Record.

FIG. 31 is a specific example of a staff descriptor which is recorded information of SIT specified in the MPEG-2 TS format. It should be noted that this staff descriptor is used for the process of invalidating the previously encoded descriptor and the process of inserting a dummy descriptor for table stuffing.

The information to be recorded in this stuffing descriptor is the information grasped by the information processing apparatus that has converted the MMT format data to the MPEG-2 TS format data, and the data is based on this grasped information. To record.

[7. About the configuration and processing of the information processing device that executes the format conversion process]
Next, with reference to FIGS. 32 and 32, the configuration and processing of the information processing apparatus for inputting the MMT format data and executing the processing of converting the MMT format data into the MPEG-2 TS format data will be described.
The MPEG-2 TS 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 inputs MMT format data and executes a process of converting the data into MPEG-2 TS format data.

The data input unit 301 inputs MMT format data 331, that is, MMT format data 331 including image data, audio data, subtitle data, 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 that records MMT format data 331. 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 a HEVC image.

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 request for starting conversion processing to MPEG-2 TS 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 received signal,
Packet separation processing according to the data type of MMTP packet, specifically, image, audio, subtitle, signaling information (MMT-SI) separation processing,

The signaling information (TLV-SI) and 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, respectively, according to the data type. To.

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 specified in the MPEG-2 TS 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 specified in the MPEG-2 TS 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 specified in the MPEG-2 TS format. ..

The management information conversion unit 314 is a signaling information (TLV-SI, MMT-SI) in which management information such as notification information and control information is stored from the MMT format data 331 input by the data input unit 301 and stored in the storage unit 304. ) And the like, and generate PSI / SI (Program Specific Information / Service Information), which is the management information specified in the MPEG-2 TS format.
The configuration and processing of the management information conversion unit 314 will be described in detail later with reference to FIG. 33.

The multiplexer (MUX) 315 includes subtitles, images, and audio data converted by the image data conversion unit 311, the audio data conversion unit 312, and the subtitle data conversion unit 313, and the management information (PSI / SI) generated by the management information conversion unit 314. ) Is input to generate a TS (transport stream) file containing these data.

The data including the TS (transport stream) file data generated by the format conversion unit 306, that is, the MPEG-2 TS format data 332 is stored in the output buffer 307 under the control of the control unit 303, and then is stored in the output buffer 307 via the recording unit 308. Is output to the information recording medium 320 and recorded.
Alternatively, it is redistributed to another information processing device via the output unit 309.
The MPEG-2 TS 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, with reference to FIG. 33, 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.
As shown in FIG. 33, the management information conversion unit 314 includes an MMT management information buffer 351 and an MMT management information (descriptor) extraction unit 352, an MPEG-2 TS management information (descriptor) generation unit 353, and an MPEG-2 TS management information (MMT management information (descriptor) extraction unit 352. It has a PSI / SI) generation unit 354 and an MPEG-2 TS 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, that is, signaling information (TLV-SI, MMT-SI) from the demultiplexer (DeMUX) 305.

As described above, the demultiplexer (DeMUX) 305 contains packets containing data such as images, sounds, and subtitles from MMT format data 331, and signaling information (TLV-) containing management information such as notification information and control information. SI, MMT-SI) is acquired, classified into packets of data type, and each packet is classified into an image data conversion unit 311 of a format conversion unit 306, an audio data conversion unit 312, and a subtitle data conversion unit 313 according to the data type. , Input to the management information conversion unit 314.

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

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

Specifically, the table storing the management information is the following table described with reference to FIG. 9 above.
(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-2 TS management information (PSI / SI) generation unit 354.
The MPEG-2 TS management information (PSI / SI) generation unit 354 is 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. Generate management information (PSI / SI).

The process to which the management information extracted by the MMT management information (descriptor) extraction unit 352 is applied is the management information recording method P1, P2, P4, P5 for the PMT (program map table) described above with reference to FIG. , And the process according to the management information recording method S1, S2, S4, S5, S6 for the SIT (selection information table) described with reference to FIG. 24.

That is, it is a method of recording as management information (PSI / SI) of the MPEG-2 TS format by using the management information included in the signaling information (TLV-SI, MMT-SI) according to the MMT format.
In this process, some descriptors and management information extracted from the MMT format data are modified to a format adapted to the MPEG-2 TS format as necessary.

On the other hand, the MPEG-2 TS management information (descriptor) generation unit 353 is management information not included in the signaling information (TLV-SI, MMT-SI) according to the MMT format, and is the management information (PSI) in the MPEG-2 TS format. Generates MPEG-2 TS management information (descriptor) that needs to be recorded as / SI).
Specifically, the management information recording method 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. 24. This is a process according to S3 and S7.

That is, the MPEG-2 TS management information (descriptor) generation unit 353 uses the MPEG-2 TS format according to the execution mode of the TS (transport stream) remultiplexing process specified in the MPEG-2 TS format, which is executed in the format conversion process. Generates management information (descriptor) related to the specified PMT (program map table), format information for recording in SIT (selection information table), and the like.

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

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

[8. Management information recording processing sequence associated with format conversion executed by the information processing device]
Next, in the format conversion process executed by the information processing apparatus 300 shown in FIG. 32, the process mainly executed by the management information conversion unit 314, that is, acquisition of management information (descriptor) from MMT format data and MPEG- The sequence of the generation processing of the management information (PSI / SI) of the 2TS format data will be described with reference to the flowchart shown in FIG. 34 and below.

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

(Step S101)
First, the information processing apparatus 300 inputs signaling information (TLV-SI) in step S101.
It is input 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 apparatus 300 executes the data separation processing of the input signaling information (TLV-SI), and from the signaling information (TLV-SI) to the TLV-NIT (network information table). ) Is acquired, 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, in step S103, the information processing apparatus 300 inputs an MMTP packet and stores it in the storage unit 304. The input data includes image data, audio data, subtitle data, signaling information (MMT-SI) storing various management information, and the like.
The demultiplexer 305 of the information processing apparatus 300 executes a process of separating the input data into image, audio, subtitles, and signaling information (MMT-SI) data.

(Step S104)
Next, in step S104, the demultiplexer 305 of the information processing apparatus 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 apparatus 300 uses signaling information (TLV-SI, MMT-SI) which is management information according to the MMT format stored in the MMT management information buffer 351. Then, a PMT (program map table), which is a management information recording table according to the MPEG-2 TS format, is generated.

In generating this PMT (program map table),
Processing using the recorded information of MPT (MMT package table) included in the signaling information (MMT-SI) is performed.
However, for example, the TS format information based on the TS (transport stream) remultiplexing condition generates management information without using the above-mentioned MPT (MMT package table) recording information.
That is, the information processing apparatus 300 generates management information (descriptors and the like) according to the TS remultiplexing processing conditions executed by the information processing apparatus 300 and records it in the PMT.
The detailed sequence of the PMT (program map table) generation process in step S105 will be described in detail later with reference to FIGS. 35 and 36.

(Step S106)
Next, in step S106, the management information conversion unit 314 of the information processing apparatus 300 uses signaling information (TLV-SI, MMT-SI) which 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-2 TS format, is generated.

In the generation of this SIT (selection information table),
Processing is performed using the following management information recording table included in the signaling information (TLV-SI, MMT-SI).
(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, the TS format information based on the TS (transport stream) remultiplexing condition is managed according to the TS remultiplexing processing condition executed by the information processing apparatus without using the recorded information in the above table. Information (descriptor, etc.) is generated and recorded in 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. 37 and 38.

(Step S107)
Next, in step S107, the information processing apparatus 300 regenerates the MPEG-2 TS format data, that is, the TS regeneration process for generating the transport stream (TS) including the image, audio, subtitles, and management information (PSI / SI). Execute the multiplexing process.
This process is a process executed by the multiplexer (MUX) 315 shown in FIG. 32.

The MPEG-2 TS format data generated here is, for example, the partial TS format data described above with reference to FIG. 7 (2).

(Step S108)
Next, the information processing apparatus 300 stores the generated MPEG-2 TS format data in the output buffer in step S108.
The generated MPEG-2 TS format data is stored in the output buffer 307 shown in FIG. 32.

(Step S109)
Next, in step S109, the information processing apparatus 300 records the MPEG-2 TS format data stored in the output buffer 307 on the information recording medium (media), or redistributes the data to other information processing apparatus 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 the flowcharts shown in FIGS. 35 and 36.

The process according to the flow shown in FIGS. 35 and 36 is executed by the management information conversion unit 314 shown in FIGS. 32 and 33.
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. 33.
The control unit 303 constantly monitors the processing of the demultiplexer 305 and the data input to the management information conversion unit 314, and whether or not the control unit 303 has input a new MPT (MMT package table) to the MMT management information buffer 351. Is determined.

If the input of a new MPT (MMT package table) is not detected, the state shifts to the standby state, that is, the process of step S121 is continuously executed.
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 the MPT (MMT package table) from the MMT management information buffer 351 and from the first descriptor loop (MPT descriptor loop) of the 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, the MPT (MMT package table), which is a management information recording table included in the MMT signaling information (MMT-SI), has the following two descriptor loop hierarchies. Has a configuration.
(1) First descriptor loop (MPT descriptor loop) (MPT_descriptors_byte)
(2) Second descriptor loop (asset descriptor loop) (asset_descriptors_byte)

The management information applied to the package specified by the MMT package identifier is recorded in the first descriptor loop (MPT descriptor loop).
Further, 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 the MPT (MMT package table).

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

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

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

As described above with reference to FIGS. 10 to 12, the PMT (program map table), which is a management information recording table compatible with the MPEG-2 TS format, has the following two hierarchical configurations of descriptor loops. ..
(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).
In addition, 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-2 TS format generated in step S123 is used as the first loop (program descriptor loop) of the PMT (program map table) which is the management information recording table specified in the MPEG-2 TS format. ) Is recorded.

The process of steps S123 to S124 is, for example, a process corresponding to the process of the method P1 and the method P2 during the management information recording process for the PMT described above with reference to FIGS. 13 to 21.

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

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

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

(Step S127)
Next, in step S127, the management information (descriptor) corresponding to the MPEG-2 TS format generated in step S126 is used in the second loop (ES) of the PMT (program map table), which is the management information recording table specified in the MPEG-2 TS format. Performs recording 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 compatible with the MPEG-2 TS format, is used. , Management information for each ES (elementary stream) is recorded.
In step S127, the management information (descriptor) corresponding to the MPEG-2 TS format generated in step S126 is used as the second loop (ES descriptor loop) of the PMT (program map table) which is the management information recording table specified in the MPEG-2 TS format. ) Is recorded.

The process of steps S126 to S127 is a process corresponding to the process of the method P4 and the method P5 during the management information recording process for the PMT described above with reference to, for example, FIGS. 13 to 21.

(Step S131)
The processes of steps S131 to S135 are sequences of processes that do not use the recorded information of MPT (MMT package table) in the signaling information (MMT-SI) of MMT format data in the management information recording process for PMT (program map table). Is.

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

First, in step S131, the information processing apparatus 300 acquires the remultiplexing condition of the MPEG-2 TS format data executed by the information processing apparatus.
Specifically, for example, the (A) TS (transport stream) remultiplexing processing condition of the item (A) of FIG. 17 described above.
This item (A) is a coding processing mode for images, sounds, etc. that can be executed at the time of format conversion, and there are, for example, the following three examples.
(1) TS remultiplexing without conversion (2) Image conversion TS remultiplexing recording processing (3) Image / audio conversion TS remultiplexing processing In step S131, the information processing apparatus 300 is, for example, any of the above types of multiplexing. Confirm whether to execute the conversion process.

(Step S132)
Next, in step S132, the information processing apparatus 300 is the first loop (program) of the PMT (program map table), which is the management information recording table specified in the MPEG-2 TS format, based on the remultiplexing condition confirmed in step S131. Generate management information (descriptor, etc.) for recording in the descriptor loop).

(Step S133)
Next, in step S133, the management information (descriptor, etc.) corresponding to the MPEG-2 TS format generated in step S132 is used in the first loop (program map table) of the PMT (program map table), which is the management information recording table specified in the MPEG-2 TS format. Performs recording 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 uses the second loop (ES) of the PMT (program map table), which is the management information recording table specified in the MPEG-2 TS format, based on the remultiplexing condition confirmed in step S131. Generate management information (descriptor, etc.) for recording in the descriptor loop).

(Step S135)
Next, in step S135, the management information (descriptor, etc.) corresponding to the MPEG-2 TS format generated in step S134 is used in the second loop of the PMT (program map table), which is the management information recording table specified in the MPEG-2 TS format. Performs recording in the ES descriptor loop).
A specific example of this management information is, for example, the management information described above with reference to FIG. 21.

[8-3. About the generation processing sequence of the selection information table (SIT)]
Next, a detailed sequence of the SIT (selection information table) generation process executed in step S106 of the overall process flow shown in FIG. 34 will be described with reference to the flowcharts shown in FIGS. 37 and 38.

The process according to the flow shown in FIGS. 37 and 38 is executed by 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. 33.
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 sends new signaling information (TLV-SI, MMT-SI) to the MMT management information buffer 351. Judge whether or not there was an input of.

If the input of new signaling information (TLV-SI, MMT-SI) is not detected, the state shifts to the standby state, that is, the process of step S151 is continuously executed.
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 signaling information (TLV-SI, MMT-SI) from the MMT management information buffer 351 and transmits information from the management information storage table constituting these generalizing information. Read the relevant 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 to be stored in the selection information table (SIT) is recorded will be described above with reference to FIGS. 9 and 23. As you can see, each 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, management information (descriptor) related to transmission information is read from these tables.

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

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

(Step S154)
Next, in step S154, the management information (descriptor) corresponding to the MPEG-2 TS format generated in step S153 is used in the SIT (selection information table) which is the management information recording table specified in the MPEG-2 TS format.
(1) Recorded data for the first descriptor loop (transmission information descriptor loop),
(2) Recorded data for the second descriptor loop (service information descriptor loop),
The process of separating the recorded data for each of these descriptor loops is executed.

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

Management information for each transmission information unit is recorded in the first descriptor loop (transmission information descriptor loop).
Further, in the second descriptor loop (service information descriptor loop), management information for each service information (program or the like) is recorded.

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

(Step S155)
Next, in step S155, the management information conversion unit 314 defines the management information of the transmission information unit separated as the recorded data for the first descriptor loop (transmission information descriptor loop) in the MPEG-2 TS format. The process of recording in the first loop (transmission information descriptor loop) of the SIT (selection information table), which is the management information recording table, is performed.

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

(Step S156)
Next, in step S156, the management information conversion unit 314 defines the management information of the service information unit separated as the recorded data for the second descriptor loop (service information descriptor loop) in the MPEG-2 TS format. The process of recording in the second loop (service information descriptor loop) of the SIT (selection information table) which is the 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 compatible with the MPEG-2 TS format, is used. Is recorded management information for each service information unit.

In step S156, the management information (descriptor) corresponding to the MPEG-2 TS format is stored in the service information unit in the second loop (service information descriptor) of the SIT (selection information table) which is the management information recording table specified in the MPEG-2 TS format. Perform the process of recording in the loop).

The process of step S156 is, for example, a process corresponding to the process of the method S4, the method S5, and the method S6 during the management information recording process for the SIT described above with reference to FIGS. 24 to 31.

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

That is, it is a sequence of processing for recording TS format information and the like based on the TS (transport stream) remultiplexing condition in the SIT (selection information table).
That is, the information processing apparatus 300 generates management information (descriptors and the like) according to the TS remultiplexing processing conditions executed by the information processing apparatus 300 without using the recorded information of the MPT (MMT package table) and SIT. Record in.
The processes of steps S161 to S165 correspond to the processes of the methods S3 and S7 during the management information recording process for the SIT described above with reference to, for example, FIGS. 24 to 31.

First, in step S161, the information processing apparatus 300 acquires the remultiplexing condition of the MPEG-2 TS format data executed by the information processing apparatus.
Specifically, for example, the (A) TS (transport stream) remultiplexing processing condition of the item (A) of FIG. 17 described above.
This item (A) is a coding processing mode for images, sounds, etc. that can be executed at the time of format conversion, and there are, for example, the following three examples.
(1) TS remultiplexing without conversion (2) Image conversion TS remultiplexing recording processing (3) Image / audio conversion TS remultiplexing processing In step S161, the information processing apparatus 300 is, for example, any of the above types of multiplexing. Confirm whether to execute the conversion process.

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

(Step S163)
Next, in step S163, the management information (descriptor, etc.) corresponding to the MPEG-2 TS format generated in step S162 is transferred to the first loop (selection information table) of the SIT (selection information table) which is the management information recording table specified in the MPEG-2 TS format. Performs recording 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. 27.

(Step S164)
Next, in step S164, the information processing apparatus 300 is the second loop (service) of the SIT (selection information table), which is the management information recording table specified in the MPEG-2 TS format, based on the remultiplexing condition confirmed in step S161. Generates management information (descriptor, etc.) for each service information unit to be recorded in the information descriptor loop).

(Step S165)
Next, in step S165, the management information (descriptor, etc.) corresponding to the MPEG-2 TS format generated in step S164 is transferred to the second loop (selection information table) of the SIT (selection information table) which is the management information recording table specified in the MPEG-2 TS format. Process 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. 31.

As described above, with reference to the flows shown in FIGS. 34 to 38, the process of recording the management information specified in the MMT format as the management information (PSI / SI) specified in the MPEG-2 TS format, and the TS multiplexing processing conditions. The processing sequence for recording the management information according to the above as the management information (PSI / SI) specified in the MPEG-2 TS format has been described.
Through these processes, it is possible to record the management information specified in the MPEG-2 TS format in just proportion when converting from the MMT format to the MPEG-2 TS format.

For example, the management information specified in the MMT format is recorded as the management information (PSI / SI) specified in the MPEG-2 TS format, and the information such as the format mode of each stream based on the TS multiplexing condition is also specified in the MPEG-2 TS format. Will be recorded as management information (PSI / SI).

By performing these processes, the device that reads the MPEG-2 TS format data including the above management information (PSI / SI) from the media and reproduces it is a device that can execute only the reproduction process for the MPEG-2 TS format data. However, normal content playback can be performed.

Further, even if the device that receives and reproduces the redelivery data of the MPEG-2 TS format data including the above management information (PSI / SI) is a device that can execute only the reproduction process for the MPEG-2 TS format data, it is normal. Content can be played back.

[9. About the configuration example of the information processing device]
Next, a hardware configuration example of an information processing device applicable as an information processing device for executing data recording on an information recording medium and data reproduction from the information recording medium will be described with reference to FIG. 39.

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

The CPU 501 is connected to the input / output interface 505 via the bus 504, and an input unit 506 consisting of various switches, a keyboard, a mouse, a microphone, etc., and an output unit 507 consisting of a display, a speaker, etc. are connected to the input / output interface 505. There is. The CPU 501 executes various processes in response to a command input from the input unit 506, and outputs the process results to, for example, the output unit 507.

The storage unit 508 connected to the input / output interface 505 is composed of, for example, a hard disk or the like, and stores a program executed by the CPU 501 and various data. The communication unit 509 functions as a transmission / reception unit for data communication via a network such as the Internet or a local area network, and further as a transmission / reception unit for broadcast waves, 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 records or reads data.

[10. Summary of the structure of this disclosure]
As described above, the embodiments of the present disclosure have been described in detail with reference to the specific embodiments. However, it is self-evident that those skilled in the art may modify or substitute the examples without departing from the gist of the present disclosure. That is, the present invention has been disclosed in the form of an example and should not be construed in a limited manner. In order to judge the gist of this disclosure, the column of claims should be taken into consideration.

The technology disclosed in the present specification can have the following configurations.
(1) It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The data processing unit
It is a configuration that records management information for the management information recording table specified in the MPEG-2 TS format.
An information processing device that selects the same type of management information as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format and records it in the management information recording table specified in the MPEG-2 TS format.

(2) The data processing unit is
The management information selected from the management information recording table specified in the MMT format is
If the data format is different from the management information data format specified in the MPEG-2 TS format, the data format is converted to the data format specified in the MPEG-2 TS format and recorded in the management information recording table specified in the MPEG-2 TS format. Information processing device.

(3) The data processing unit is
When the same type of management information as the management information recorded in the management information recording table specified in the MMT format is not specified as the management information specified in the MPEG-2 TS format.
Generates new management information of the same type as the management information recorded in the management information recording table of the MMT format specification and records it in the management information recording table of the MPEG-2 TS format specification (1) or ( The information processing device according to 2).

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

(5) The data processing unit is
If the management information recorded in the management information recording table of the MMT format specification is the management information that needs to be corrected according to the processing status, the management information is corrected and the corrected management information is used as the management information of the MPEG-2 TS format specification. The information processing apparatus according to any one of (1) to (4), which is recorded in the management information recording table specified in the MPEG-2 TS format.

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

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

(8) The management information recording table specified 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, which is signaling information specified in the MMT format, or MMT-SI.

(9) The management information recording table specified 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), which is at least one of the tables of the above.

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

(11) The data processing unit is
The management information recorded in the TLV-SI, which is the signaling information specified in the MMT format, or the management information recording table included in the MMT-SI is transferred to the SIT (selection information table), which is the management information recording table specified 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 the first descriptor loop (transmission information descriptor) of the SIT (selection information table). Record in the 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 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) to be recorded in the loop).

(12) The data processing unit is
Management information including coding mode information according to the TS remultiplexing processing mode to be executed in the conversion processing from the MMT format to the MPEG-2 TS format.
The information processing apparatus according to any one of (1) to (11), which is newly generated as management information specified in the MPEG-2 TS format and recorded in the management information recording table specified in the MPEG-2 TS format.

(13) The information processing apparatus further includes
The information processing apparatus according to any one of (1) to (12), wherein the MPEG-2 TS 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-2 TS format data generated by the data processing unit by format conversion is partial TS format data.

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

(16) This is an information processing method executed by an information processing device.
The information processing device is
It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The data processing unit
Executes the management information recording process for the management information recording table specified in the MPEG-2 TS format.
In the management information recording process,
An information processing method for selecting management information of the same type as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format and recording the management information in the management information recording table specified in the MPEG-2 TS format.

(17) A program that executes information processing in an information processing device.
The information processing device is
It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The program is installed in the data processing unit.
Executes the management information recording process for the management information recording table specified in the MPEG-2 TS format.
In the management information recording process,
A program that selects management information of the same type as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format and records it in the management information recording table specified in the MPEG-2 TS format.

Further, the series of processes described in the specification can be executed by hardware, software, or a composite configuration of both. When executing processing by software, install the program that records the processing sequence in the memory in the computer built in the dedicated hardware and execute it, or execute the program on a general-purpose computer that can execute various processing. It can be installed and run. For example, the program can be pre-recorded on a recording medium. In addition to installing the program 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.

It should be noted that the various processes described in the specification are not only executed in chronological order according to the description, but may also be executed in parallel or individually as required by the processing capacity of the device that executes the processes. Further, in the present specification, the system is a logical set configuration of a plurality of devices, and the devices having each configuration are not limited to those in the same housing.

As described above, according to the configuration of one embodiment of the present disclosure, a configuration is realized in which the management information specified in the MPEG-2 TS format is recorded in just proportion when converting from the MMT format to the MPEG-2 TS format. To.
Specifically, for example, in the process of converting MMT format data into MPEG-2 TS format data, the same type of management information as the management information specified in the MPEG-2 TS format is selected from the management information recording table specified in the MMT format. Record in the management information recording table specified in the MPEG-2 TS format. If the data format of the management information specified in each format is different, the data format is converted to the data format specified in the MPEG-2 TS format and recorded.
With this configuration, when converting from the MMT format to the MPEG-2 TS format, a configuration is realized in which the management information specified in the MPEG-2 TS format is recorded without excess or deficiency.

20 Transmitter 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-2 TS 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-2 TS format data 351 MMT management information buffer 352 MMT management information (descriptor) extraction unit 353 MPEG -2TS management information (descriptor) generation unit 354 MPEG-2 TS management information (PSI / SI) generation unit 355 MPEG-2 TS management information (PSI / SI) buffer 501 CPU
502 ROM
503 RAM
504 Bus 505 Input / output interface 506 Input section 507 Output section 508 Storage section 509 Communication section 510 drive 511 Removable media

Claims (17)

It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The data processing unit
It is a configuration that records management information for the management information recording table specified in the MPEG-2 TS format.
Select the same type of management information as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format, and record it in the management information recording table specified in the MPEG-2 TS format.
When the same type of management information as the management information recorded in the management information recording table specified in the MMT format is not specified as the management information specified in the MPEG-2 TS format.
An information processing device that generates management information of a new MPEG-2 TS format specification of the same type as the management information recorded in the management information recording table of the MMT format specification and records it in the management information recording table of the MPEG-2 TS format specification . It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The data processing unit
It is a configuration that records management information for the management information recording table specified in the MPEG-2 TS format.
Select the same type of management information as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format, and record it in the management information recording table specified in the MPEG-2 TS format.
When the same type of management information as the management information specified in the MPEG-2 TS format is not recorded in the management information recording table specified in the MMT format.
An information processing device that generates new management information and records it in the management information recording table specified in the MPEG-2 TS format. The data processing unit
The management information selected from the management information recording table specified in the MMT format is
If the data format is different from the management information data format specified in the MPEG-2 TS format, the data format is converted to the data format specified in the MPEG-2 TS format and recorded in the management information recording table specified in the MPEG - 2 TS format. The information processing apparatus according to 2 . The data processing unit
If the management information recorded in the management information recording table of the MMT format specification is the management information that needs to be corrected according to the processing status, the management information is corrected and the corrected management information is used as the management information of the MPEG-2 TS format specification. The information processing apparatus according to claim 1 or 2 , which is recorded in the management information recording table specified in the MPEG-2 TS format. The data processing unit
When the management information recorded in the management information recording table specified in the MMT format includes copy control information, time information, or network information, the management information including such information is corrected according to the processing status, and the corrected management is performed. The information processing apparatus according to claim 4 , wherein the information is recorded in the management information recording table specified in the MPEG-2 TS format as the management information specified in the MPEG-2 TS format. The management information recording table specified in the MPEG-2 TS format is
The information processing apparatus according to claim 1 or 2 , which is at least one table of PMT (program map table) or SIT (selection information table). The management information recording table specified in the MMT format is
The information processing apparatus according to claim 1 or 2 , which is a management information recording table included in at least one of TLV-SI, which is signaling information specified in the MMT format, or MMT-SI. The management information recording table specified 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 claim 7 , which is at least one of the tables of the above. The data processing unit
The management information recorded in the first descriptor loop (MPT descriptor loop) of the MPT (MMT package table), which is the management information recording table specified in the MMT format, is stored.
Record in the first descriptor loop (program descriptor loop) of PMT (program map table), which is the management information recording table specified in the MPEG-2 TS format.
The management information recorded in the second descriptor loop (asset descriptor loop) of the MPT (MMT package table) is
The information processing apparatus according to claim 1 or 2 , which is recorded in the second descriptor loop (ES descriptor loop) of the PMT (program map table). The data processing unit
The management information recorded in the TLV-SI, which is the signaling information specified in the MMT format, or the management information recording table included in the MMT-SI is transferred to the SIT (selection information table), which is the management information recording table specified 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 the first descriptor loop (transmission information descriptor) of the SIT (selection information table). Record in the 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 the second descriptor loop (service information descriptor) of the SIT (selection information table). The information processing apparatus according to claim 1 or 2 , which is recorded in the loop). The data processing unit
Management information including coding mode information according to the TS remultiplexing processing mode to be executed in the conversion processing from the MMT format to the MPEG-2 TS format.
The information processing apparatus according to claim 1 or 2 , which is newly generated as management information specified in the MPEG-2 TS format and recorded in the management information recording table specified in the MPEG-2 TS format. The information processing device further
The information processing apparatus according to claim 1 or 2 , wherein the MPEG-2 TS 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 or 2 , wherein the MPEG-2 TS format data generated by the data processing unit by format conversion is partial TS format data. The data processing unit
The 16-bit tag descriptor, which is the management information recorded in the management information recording table specified in the MMT format,
The information processing apparatus according to claim 1 or 2 , which is converted into an 8-bit tag descriptor which is the management information specified in the MPEG-2 TS format and recorded in the management information recording table specified in the MPEG-2 TS format. It is an information processing method executed in an information processing device.
The information processing device is
It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The data processing unit
Executes the management information recording process for the management information recording table specified in the MPEG-2 TS format.
In the management information recording process,
The same type of management information as the management information specified in the MPEG-2 TS format is selected from the management information recording table specified in the MMT format, and the process of recording in the management information recording table specified in the MPEG-2 TS format is executed .
When the same type of management information as the management information recorded in the management information recording table specified in the MMT format is not specified as the management information specified in the MPEG-2 TS format.
Information for executing the process of generating management information of the same type of new MPEG-2 TS format specification as the management information recorded in the management information recording table of the MMT format specification and recording it in the management information recording table of the MPEG-2 TS format specification. Processing method. It is an information processing method executed in an information processing device.
The information processing device is
It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The data processing unit
Executes the management information recording process for the management information recording table specified in the MPEG-2 TS format.
In the management information recording process,
A process of selecting the same type of management information as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format and recording it in the management information recording table specified in the MPEG-2 TS format is executed.
When the same type of management information as the management information specified in the MPEG-2 TS format is not recorded in the management information recording table specified in the MMT format.
An information processing method that executes a process of generating new management information and recording it in the management information recording table specified in the MPEG-2 TS format. It is a program that executes information processing in an information processing device.
The information processing device is
It has a data processing unit that converts MMT format data into MPEG-2 TS format data.
The program is installed in the data processing unit.
Executes the management information recording process for the management information recording table specified in the MPEG-2 TS format.
In the management information recording process,
A process of selecting the same type of management information as the management information specified in the MPEG-2 TS format from the management information recording table specified in the MMT format and recording it in the management information recording table specified in the MPEG-2 TS format is executed .
When the same type of management information as the management information recorded in the management information recording table specified in the MMT format is not specified as the management information specified in the MPEG-2 TS format.
A program that generates new management information of the same type as the management information recorded in the management information recording table of the MMT format specification and records it in the management information recording table of the MPEG-2 TS format specification. ..

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