WO2017199743A1 - Appareil de traitement d'informations, support d'enregistrement d'informations, et procédé de traitement d'informations, et programme - Google Patents

Appareil de traitement d'informations, support d'enregistrement d'informations, et procédé de traitement d'informations, et programme Download PDF

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Publication number
WO2017199743A1
WO2017199743A1 PCT/JP2017/017113 JP2017017113W WO2017199743A1 WO 2017199743 A1 WO2017199743 A1 WO 2017199743A1 JP 2017017113 W JP2017017113 W JP 2017017113W WO 2017199743 A1 WO2017199743 A1 WO 2017199743A1
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Prior art keywords
data
information
image
packet
stream
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PCT/JP2017/017113
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English (en)
Japanese (ja)
Inventor
幸一 内村
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ソニー株式会社
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Priority to JP2018518205A priority Critical patent/JP7014157B2/ja
Publication of WO2017199743A1 publication Critical patent/WO2017199743A1/fr

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/926—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation

Definitions

  • the present disclosure relates to an information processing device, an information recording medium, an information processing method, and a program. More specifically, the present invention relates to an information processing apparatus, an information recording medium, an information processing method, and a program for recording and reproducing a high frame rate image with a 120 frame rate, for example.
  • the MMT format defines a data transfer method (transport format) for transmitting encoded data, which is content configuration data, such as images (Video), audio (Audio), and subtitles (Subtitles) via broadcast waves or networks. It is what.
  • the MMT format is defined as a format that enables recording, transfer, and playback of a progressive image (120p image) with a high frame rate of 120 frames per second, for example.
  • a progressive image is an image on which output processing according to the progressive method is executed.
  • 120p means a frame rate of 120 frames / second
  • p means a progressive image. The same applies to the following description.
  • an information recording medium used for recording / reproducing content composed of images (Video), audio (Audio), subtitles (Subtitles), and the like similar to broadcasting
  • BD Blu-ray (registered trademark) Disc
  • flash memory As an existing data format used in these information recording media, there is an MPEG-2TS format.
  • the current MPEG-2TS format is not a format that enables recording and reproduction of a high frame rate image such as 120 f / s (frame / second) scheduled to be used in the MMT format.
  • a high frame rate image such as 120 f / s (frame / second) scheduled to be used in the MMT format.
  • the data recording / playback processing configuration using BD is described in, for example, Japanese Patent Application Laid-Open No. 2011-023071.
  • An object of the present invention is to provide an information processing apparatus, an information recording medium, an information processing method, and a program that enable recording and reproduction using the recording medium.
  • the first aspect of the present disclosure is: A data processing unit for converting MMT format data into MPEG-2TS format;
  • the data processing unit An MPEG-2TS that stores only the main stream that constitutes the image data included in the MMT format data and the substream in the TS packet in which different packet identifiers (PIDs) are set, and that allows selective reproduction of only the main stream based on the PID
  • PIDs packet identifiers
  • the second aspect of the present disclosure is: A data processing unit for executing a reproduction process of recorded data of the information recording medium;
  • the information recording medium is A main stream used for both high frame rate image playback and low frame rate image playback, and a substream used only for high frame rate playback are stored in TS packets according to the MPEG-2TS format for each stream.
  • Image data The image data reproduction control information is recorded,
  • the data processing unit From the playback control information, obtain a packet identifier (PID) corresponding to a stream capable of distinguishing a main stream storage packet and a substream storage packet; By using the acquired packet identifier (PID), each stream storage packet is identified, and the information processing apparatus executes image reproduction in units of streams.
  • PID packet identifier
  • the third aspect of the present disclosure is: A main stream used for both high frame rate image playback and low frame rate image playback, and a substream used only for high frame rate playback are stored in TS packets according to the MPEG-2TS format for each stream.
  • Image data An information recording medium that records reproduction control information of the image data, In the playback control information, a packet identifier (PID) corresponding to a stream capable of distinguishing a main stream storage packet and a substream storage packet is set.
  • PID packet identifier
  • the present invention is an information recording medium in which each stream storage packet is identified using a packet identifier (PID) read from the reproduction control information, and image reproduction in units of streams can be executed.
  • the fourth aspect of the present disclosure is: An information processing method executed in an information processing apparatus,
  • the information processing apparatus includes: A data processing unit for converting MMT format data into MPEG-2TS format;
  • the data processing unit is An MPEG-2TS that stores only the main stream that constitutes the image data included in the MMT format data and the substream in the TS packet in which different packet identifiers (PIDs) are set, and that allows selective reproduction of only the main stream based on the PID
  • PIDs packet identifiers
  • the fifth aspect of the present disclosure is: An information processing method executed in an information processing apparatus,
  • the information processing apparatus includes: A data processing unit for executing a reproduction process of recorded data of the information recording medium;
  • the information recording medium is A main stream used for both high frame rate image playback and low frame rate image playback, and a substream used only for high frame rate playback are stored in TS packets according to the MPEG-2TS format for each stream.
  • the image data reproduction control information is recorded,
  • the data processing unit is From the playback control information, obtain a packet identifier (PID) corresponding to a stream capable of distinguishing a main stream storage packet and a substream storage packet;
  • PID packet identifier
  • the sixth aspect of the present disclosure is: A program for executing information processing in an information processing apparatus;
  • the information processing apparatus includes: A data processing unit for converting MMT format data into MPEG-2TS format;
  • the program is stored in the data processing unit.
  • An MPEG-2TS that stores only the main stream that constitutes the image data included in the MMT format data and the substream in the TS packet in which different packet identifiers (PIDs) are set, and that allows selective reproduction of only the main stream based on the PID It is in a program that generates format data.
  • PIDs packet identifiers
  • the seventh aspect of the present disclosure is: A program for executing information processing in an information processing apparatus;
  • the information processing apparatus includes: A data processing unit for executing a reproduction process of recorded data of the information recording medium;
  • the information recording medium is A main stream used for both high frame rate image playback and low frame rate image playback, and a substream used only for high frame rate playback are stored in TS packets according to the MPEG-2TS format for each stream.
  • Image data The image data reproduction control information is recorded,
  • the program is stored in the data processing unit.
  • a stream-corresponding packet identifier capable of distinguishing a main stream storage packet and a substream storage packet is acquired,
  • the program of the present disclosure is a program that can be provided by, for example, a storage medium or a communication medium provided in a computer-readable format to an information processing apparatus or a computer system that can execute various program codes.
  • a program in a computer-readable format, processing corresponding to the program is realized on the information processing apparatus or the computer system.
  • system is a logical set configuration of a plurality of devices, and is not limited to one in which the devices of each configuration are in the same casing.
  • a configuration in which a high frame rate image according to the MMT format is recorded as an MPEG-2TS format and can be played back is realized.
  • the main stream and substream according to the MMT format are stored in different packet identifier (PID) setting packets, and MPEG-2TS format data that enables selective playback in units of streams based on the PID is recorded. Record on media.
  • the playback apparatus acquires a stream-corresponding packet identifier (PID) from the playback control information, identifies each stream storage packet using the acquired PID, and executes image playback in units of streams.
  • PID packet identifier
  • FIG. 10 is a flowchart illustrating a processing sequence executed by an information processing apparatus that executes data reproduction from an information recording medium. It is a figure explaining the hardware structural example of the information processing apparatus applied to the process of this indication.
  • the MMT format is a data transfer method for transmitting encoded data, which is content configuration data, such as an image (Video), audio (Audio), subtitle (Subtitle), etc., via a broadcast wave or a network.
  • content configuration data such as an image (Video), audio (Audio), subtitle (Subtitle), etc.
  • Transport format is specified.
  • the MMT format is defined as a format that enables recording, transfer, and playback of a progressive image (120p image) with a high frame rate of 120 frames per second, for example.
  • FIG. 1 is a diagram for explaining the MMT format, which is a file format specified in ISO / IEC 23008-1.
  • FIGS. 1A to 1C show the structure of MMT format data.
  • FIG. 1A shown at the bottom is a diagram showing an overall configuration of MMT format data.
  • the MMT format data is composed of a plurality of media presentation units (MPUs).
  • MPU is a unit set as one unit, such as an image, an audio
  • 1 MPU corresponds to 1 GOP (Group of Picture) which is one MPEG compressed image unit.
  • MFU media fragment units
  • the MMTP packet has a variable length and can be set to various packet sizes.
  • Each MMTP packet includes a header (MMT header) that stores attribute information and the like, and a payload (MMT payload) that stores actual data of the encoded image and the like.
  • the MPEG-2TS format is used for storing encoded data, which is content configuration data, such as images (Video), audio (Audio), subtitles (Subtitles), etc., in a recording medium (media), or when transmitted via broadcast waves or a network.
  • This format defines a data storage format (container format) such as encoded data.
  • the MPEG-2TS format is a format standardized by ISO13818-1, and is used for data recording, digital broadcasting, and the like for BD (Blu-ray (registered trademark) Disc), for example.
  • FIG. 2A to 2C are diagrams showing the structure of MPEG-2TS format data.
  • FIG. 2A shown at the bottom is a diagram showing the overall structure of MPEG-2TS format data.
  • the MPEG-2TS format data is composed of a plurality of elementary streams (Elementary streams).
  • the elementary stream (Elementary stream) is a unit that is set as one unit such as an image, audio, or caption.
  • PES Packetized Elementary stream
  • FIG. 3 is a diagram for explaining an example of a storage configuration of image data using MMT format data.
  • the storage example of the image data shown in FIG. 3 is an example in which progressive image (120p image) data having a high frame rate of 120 frames per second is stored as MMT format data.
  • the video stream configuration data shown in (1) at the bottom of FIG. 3 is progressive image (120p image) data having a high frame rate of 120 frames per second. This 120p video stream alternates every frame, (A) Main stream configuration frame, (B) a substream configuration frame; These two stream configuration frames are alternately set.
  • the image data is subjected to, for example, HEVC (MPEG-4 HEVC) encoding processing and stored in MMT format data.
  • HEVC MPEG-4 HEVC
  • a progressive image (120p image) having a high frame rate of 120 frames per second can be reproduced.
  • a progressive image (60p image) with a low frame rate of 60 frames per second by selectively reproducing only (a) the main stream component frame without (b) reproducing the substream component frame.
  • Reproduction devices capable of reproducing and displaying 120p images and display devices such as televisions are currently in the development stage and are expected to be commercialized and popularized in the future, but many of the current display devices such as televisions and reproduction devices Does not have a playback display function for 120p images, but only has a playback display function for 60P images.
  • MMT format data can be played back and displayed on such a current device capable of playing back 60p images, every other image frame constituting a 120p image is used as a main stream and the rest as substreams. It is set.
  • the current device capable of reproducing and displaying 60p images can reproduce and display 60p images by selecting and reproducing and displaying only the main stream.
  • the MMT format data is (2a) MFU (media fragment unit) compatible with main stream (2b) MFU (Media Fragment Unit) for substreams
  • the data stored in the MFU groups corresponding to these two streams is data stored in a plurality of MMTP packets.
  • a packet identifier (for example, ID1) corresponding to the main stream is stored in the MMT header of the MMTP packet storing the main stream data.
  • a packet identifier (for example, ID2) corresponding to the substream is stored in the MMT header of the MMTP packet storing the substream data.
  • the playback device extracts and plays back only the main stream from the MMT format data (60p image playback), and extracts and plays back both the main stream and substream data ( 120 image reproduction) or the like can be selectively executed.
  • FIG. 4 is a diagram for explaining an example of image reproduction display processing.
  • FIG. 4 (1) shows the same video stream configuration data as shown in FIG. 3 (1). That is, it is progressive image (120p image) data having a high frame rate of 120 frames per second. This 120p video stream alternates every frame, (A) Main stream configuration frame, (B) a substream configuration frame; These two stream configuration frames are alternately set.
  • FIG. 4B shows an example of 120p image reproduction.
  • the 120p image compatible display device 10 is a display device (television) that can reproduce and display a progressive image (120p image) with a high frame rate of 120 frames per second.
  • This 120p image-compatible display device 10 reproduces and displays all the frames of (a) main stream constituent frames and (b) substream constituent frames, and displays a high frame rate progressive image (120p image) of 120 frames per second. Perform playback display.
  • FIG. 4 (3) shows a 60p image reproduction example.
  • the display device 20 that supports 60p images is a display device (television) that can reproduce and display only progressive images (60p images) with a low frame rate of 60 frames per second.
  • the 60p image corresponding display device 20 reproduces and displays a progressive image (60p image) with a low frame rate of 60 frames per second by selecting and reproducing and displaying only the main stream constituent frames (a).
  • the MMT format is a data transfer method for transmitting encoded data, which is content configuration data, such as an image (Video), audio (Audio), subtitle (Subtitle), etc., via a broadcast wave or a network.
  • (Transport format) is specified.
  • the MMT format is defined as a format that enables recording, transfer, and playback of a progressive image (120p image) with a high frame rate of 120 frames per second, for example.
  • an information recording medium used for recording / reproducing content including images (Video), audio (Audio), subtitles (Subtitles), and the like similar to broadcasting
  • images Video
  • audio Audio
  • subtitles Subtitles
  • flash memory for example, BD (Blu-ray (registered trademark) Disc ) Or flash memory.
  • MPEG-2TS As a data recording format used in these information recording media, there is an MPEG-2TS format.
  • this MPEG-2TS format is not a format that enables recording and reproduction of high frame rate images such as 120 f / s (frame / second) allowed in the MMT format.
  • the information processing apparatus 50 receives MMT format data 40 transmitted from a broadcasting station 31 or a transmission apparatus 30 such as a content server 32, and an information recording medium 70 such as a BD or a flash memory.
  • a broadcasting station 31 or a transmission apparatus 30 such as a content server 32
  • an information recording medium 70 such as a BD or a flash memory.
  • the recording process is executed with the MMT format data, it is played back by a playback apparatus such as a current BD player, that is, a playback apparatus that executes a playback process to which a playback program for playing back MPEG-2TS format data is applied. I can't.
  • a playback apparatus such as a current BD player
  • the information processing apparatus 50 executes a format conversion process for converting the MMT format data 40 into MPEG-2TS format data 60 as shown in FIG. A specific example of this format conversion process will be described below with reference to FIG.
  • FIG. 6 is a diagram showing a storage configuration example of a 120p image for the MMT format data described with reference to FIGS.
  • FIGS. 6A to 6B shows the following data examples.
  • the MMT format data is composed of MMTP packets as shown in FIG.
  • each MMTP packet can be classified into the following two types of packets.
  • A a mainstream-compatible MMTP packet [MMTP packet () 120p (60p)] storing image data corresponding to a mainstream configuration frame that can be used for both 120p and 60p image reproduction;
  • B Substream-compatible MMTP packet [MMTP packet () 120p] storing image data corresponding to a substream configuration frame that is applied only to 120p image reproduction,
  • the MMT format data shown in FIG. 6 (1) is composed of the above two types (a) and (b) of two types of MMTP packets.
  • Each of the two types of MMTP packets (a) and (b) includes a header that includes a packet identifier that can identify which stream stores image data corresponding to the main stream or the substream. Is set.
  • the MMT format data is (2a) Main MFU (main stream compatible MFU (Media Fragment Unit)) (2b) Sub-MFU (MFU (Media Fragment Unit) corresponding to sub-stream) It becomes possible to divide the MFU group corresponding to these two streams.
  • main MFU group in FIG. 6 (2a) stores image data corresponding to, for example, 1 GOP (Group of pictures) which is one MPEG compressed image unit.
  • 3a) Main MPU (media presentation unit) Can be classified as
  • one MPU has a header part and a payload part.
  • the header portion stores attribute information related to the image data stored in the payload portion.
  • the payload portion stores compressed image data.
  • the payload of the main MPU stores encoded (compressed) data (HEVC encoded data) of main image stream configuration data used for both 120p image reproduction and 60p image reproduction.
  • sub-MFU group in FIG. 6 (2b) stores image data corresponding to, for example, 1 GOP (Group of pictures) which is one MPEG compressed image unit.
  • Sub MPU Media Presentation Unit
  • Compressed image data is stored in the payload section of the sub MPU.
  • the sub-MPU payload stores encoded (compressed) data (HEVC encoded data) of sub-image stream configuration data used only for 120p image reproduction.
  • the information processing apparatus 50 shown in FIG. 5 executes steps S01 to S03 shown in FIGS. 6 to 7 to perform processing for converting MMT format data into MPEG-2TS format data.
  • steps S01 to S03 shown in FIGS. 6 to 7 to perform processing for converting MMT format data into MPEG-2TS format data.
  • processing of each step will be described.
  • Step S01 First, the information processing apparatus 50 executes the process of step S01 shown in FIG. FIG. 6 shows processing steps (S01a) and (S01b) corresponding to two streams of a main stream and a substream.
  • Step S01a is processing corresponding to the main stream, and executes the following processing.
  • the information processing apparatus 50 acquires image data corresponding to the main stream from the main MPU storing the main stream constituent image data, and performs MPEG for each predetermined unit of data, for example, one access unit, specifically, for example, one picture.
  • -A PES packet (main PES packet) defined in the TS format is generated.
  • step S01b is processing corresponding to a substream, and the following processing is executed.
  • the information processing apparatus 50 acquires image data corresponding to the substream from the sub MPU storing the substream constituent image data, and performs MPEG for each predetermined unit of data, for example, one access unit, specifically, for example, one picture.
  • a PES packet (sub-corresponding PES packet) defined in the TS format is generated.
  • the PES packet includes a PES header and a PES payload.
  • data of one picture unit extracted from the main MPU is stored as the PES payload of one PES packet, and the attribute information is recorded in the PES header.
  • the information recorded in the PES header includes, for example, an identifier that can identify whether the data stored in the PES packet is image data corresponding to a main stream or image data corresponding to a substream, Necessary attribute information and the like. Such information may be acquired from the MPU header of the MMT format data and recorded as it is, or the information processing apparatus 50 may record information newly generated based on the acquired information from the MPU header. Good.
  • Step S02 Next, with reference to FIG. 7, the process of step S02 performed by the information processing apparatus 50 will be described.
  • FIG. 7 also shows the process of step S01 described with reference to FIG.
  • the information processing apparatus 50 Based on the data acquired from the MPU of the MMT packet in steps S01a and S01b, the information processing apparatus 50 generates a PES packet corresponding to the main stream (main corresponding PES packet) and a PES packet corresponding to the substream (sub corresponding PES packet). Generate.
  • TS packet generation is performed using the stored data of the PES packet as the process of step S02.
  • the TS packet has a fixed length unlike the MMTP packet described above, and the packet size of one TS packet is fixed to 188 bytes.
  • the information processing apparatus 50 executes a processing step (S02a) for the main corresponding PES packet storing the main stream image data and a processing step (S02b) for the sub corresponding PES packet storing the substream image data.
  • Step S02a is a process for the main corresponding PES packet storing the main stream image data, and a main corresponding TS packet is generated using the stored data of the main corresponding PES packet.
  • step S02b is a process for the sub-corresponding PES packet storing the sub-stream image data, and a sub-corresponding TS packet is generated using the storage data of the sub-corresponding PES packet.
  • the TS packet is composed of a 4-byte TS header and a 184-byte TS payload.
  • Image data (HEVC encoded data) is stored in the TS payload, and information regarding the image data stored in the TS payload is recorded in the TS header.
  • the TS header includes a stream-corresponding packet identifier (PID) that can identify whether the data stored in the TS payload is image data corresponding to a main stream or image data corresponding to a substream. Attribute information necessary for reproduction processing and the like is recorded. Such information may be acquired from the PES header and recorded as it is, or the information processing apparatus 50 may be configured to record information newly generated based on the acquired information from the PES header.
  • PID stream-corresponding packet identifier
  • Step S03 In steps S02a and S02b, TS packets corresponding to each stream, that is, (A) Main-compatible TS packet sequence (b) Sub-compatible TS packet sequence When the generation of these TS packet sequences for each stream is completed, the process of combining these two types of stream-compatible TS packet sequences into one TS packet sequence To do. This is the main / sub compatible TS packet shown in FIG. 7 (6).
  • the arrangement order of the TS packets is the same as the MMT format data input as the format conversion target, that is, the data arrangement order of the MMT format data shown in FIG.
  • the packet size of the MMTP packet is not fixed, and there is a possibility that it may be difficult to completely match the data arrangement order. In this case, adjustment is performed by recording dummy data. Or you may perform the arrangement
  • the information processing apparatus 50 shown in FIG. 5 executes processing steps S01 to S03 described with reference to FIGS. 6 and 7, and executes processing for converting MMT format data into MPEG-2TS format data. That is, the MMT format data composed of the MMTP packet sequence shown in FIG. 6 (1) is converted into the MPEG-2 TS format data composed of the TS packet sequence shown in FIG. 7 (6).
  • the MPEG-2 TS format data composed of the TS packet sequence shown in FIG. 7 (6) is recorded on an information recording medium 70 such as a BD attached to the information processing apparatus 50 as shown in FIG.
  • the information processing apparatus 50 can record the MMT format data received from a broadcasting station or the like on the information recording medium 70 as MPEG-2TS format data.
  • the MPEG-2TS format data recorded on this information recording medium can be reproduced by a general BD player or the like having a reproduction program for MPEG-2TS format data. A specific reproduction processing example will be described later.
  • the format conversion processing example described with reference to FIGS. 6 and 7 is a processing example in which all image data is acquired from MMT format data storing 120p image data and converted to MPEG-2TS format data.
  • the substream image included in the MMT format data is not subject to conversion, and only the main stream image is extracted to form MPEG-2TS format data and recorded on an information recording medium such as a BD, for example. It is possible to reproduce and display a 60p image in an apparatus that reproduces and displays a 60p image.
  • 8 and 9 are diagrams for explaining an example of format conversion processing for extracting only the main stream image from the MMT format data and generating MPEG-2TS format data.
  • the information processing apparatus 50 shown in FIG. 5 can generate MPEG-2TS format data storing only main stream image data in accordance with the processes shown in FIGS. 8 and 9 (steps S11 to S12).
  • the format conversion processing sequence will be described with reference to FIGS.
  • FIG. 8 (1) is a diagram showing a storage configuration example of a 120p image for the MMT format data described with reference to FIGS.
  • the MMTP packet storing the main stream image is selectively extracted from the MMT format data. This selective extraction can be executed based on the header information of the MMTP bucket.
  • FIG. 8 (2) main MFU indicates the MFU constituting the MMTP packet storing the main stream of the MMT format data of FIG. 8 (1), that is, the main MFU.
  • FIG. 8 (2) main MFU group stores image data corresponding to, for example, 1 GOP (Group of Picture) which is one MPEG compressed image unit.
  • Main MPU Media Presentation Unit
  • one MPU has a header part and a payload part.
  • the header portion stores attribute information related to the image data stored in the payload portion.
  • the payload portion stores compressed image data.
  • the payload of the main MPU stores encoded (compressed) data (HEVC encoded data) of main image stream configuration data used for both 120p image reproduction and 60p image reproduction.
  • the information processing apparatus 50 shown in FIG. 5 executes steps S11 to S13 shown in FIGS. 8 to 9 to convert MMT format data into MPEG-2TS format data.
  • steps S11 to S13 shown in FIGS. 8 to 9 to convert MMT format data into MPEG-2TS format data.
  • processing of each step will be described.
  • Step S11 The information processing apparatus 50 first executes the process of step S11 shown in FIG.
  • Step S11 is a process for the main MPU storing the main stream image data, and the following process is executed.
  • the information processing apparatus 50 acquires image data corresponding to the main stream from the main MPU storing the main stream constituent image data, and performs MPEG for each predetermined unit of data, for example, one access unit, specifically, for example, one picture.
  • -A PES packet (main PES packet) defined in the TS format is generated.
  • the PES packet is composed of a PES header and a PES payload.
  • data of one picture unit extracted from the main MPU is stored as the PES payload of one PES packet, and the attribute information is recorded in the PES header.
  • the information recorded in the PES header includes, for example, an identifier that can identify whether the data stored in the PES packet is image data corresponding to a main stream or image data corresponding to a substream, Necessary attribute information and the like. Such information may be acquired from the MPU header of the MMT format data and recorded as it is, or the information processing apparatus 50 may record information newly generated based on the acquired information from the MPU header. Good.
  • Step S12 Next, with reference to FIG. 9, the process of step S12 executed by the information processing apparatus 50 will be described.
  • FIG. 9 also shows the process of step S11 described with reference to FIG.
  • the information processing apparatus 50 generates a main stream compatible PES packet (main compatible PES packet) based on the data acquired from the MPU of the MMT packet in step S11.
  • TS packet generation is performed using the stored data of the PES packet as the process of step S12.
  • the TS packet has a fixed length unlike the MMTP packet described above, and the packet size of one TS packet is fixed to 188 bytes.
  • the information processing apparatus 50 executes a processing step (S12) for the main corresponding PES packet storing the main stream image data.
  • Step S12 is a process for the main corresponding PES packet storing the main stream image data, and a main corresponding TS packet is generated using the storage data of the main corresponding PES packet.
  • the TS packet is composed of a 4-byte TS header and a 184-byte TS payload.
  • Image data (HEVC encoded data) is stored in the TS payload, and information regarding the image data stored in the TS payload is recorded in the TS header.
  • PID an identifier
  • Attribute information and the like Such information may be acquired from the PES header and recorded as it is, or the information processing apparatus 50 may be configured to record information newly generated based on the acquired information from the PES header.
  • the information processing apparatus 50 shown in FIG. 5 executes the processing steps S11 to S12 described with reference to FIGS. 8 and 9, and selectively extracts only the main stream image data included in the MMT format data.
  • a process of converting to MPEG-2TS format data having image data is executed.
  • the MPEG-2 TS format data composed of the TS packet sequence shown in FIG. 9 (5) is recorded on an information recording medium 70 such as a BD attached to the information processing apparatus 50 as shown in FIG.
  • the information processing apparatus 50 can record the MMT format data received from a broadcasting station or the like on the information recording medium 70 as MPEG-2TS format data.
  • the MPEG-2TS format data recorded on this information recording medium is MPEG-2TS format data having only main stream image data that can be reproduced as a 60p image. Playback by a general BD player having a playback program for MPEG-2TS format data enables playback of 60p images. A specific reproduction processing example will be described later.
  • the information recording medium is, for example, a BD (Blu-ray (registered trademark) Disc) or a flash memory.
  • FIG. 10 is a diagram showing an example of a directory structure of data including MPEG-2TS format data recorded on the information recording medium 70. As shown in FIG. 10, various management information, reproduction control information, and reproduction target data storage files are set in the directory. The reproduction target data is data recorded according to the MPEG-2TS format.
  • Index files Index files, Playlist files, Clip information file, Clip AV stream file, For example, these files are recorded.
  • the playlist file is a file that defines the playback order of contents in accordance with the program information of the playback program specified by the title.
  • the playlist file includes specification information of a clip information file that records playback position information and the like.
  • the clip information file is a file specified by the playlist file, and has reproduction position information of the clip AV stream file.
  • the clip AV stream file is a file storing AV stream data to be reproduced.
  • the clip AV stream file is composed of packets (TS packets) storing data such as images, sounds, and captions to be reproduced, and is MPEG-2TS format data.
  • index file is management information, playback control information, A file that stores reproduction data attribute information and the like, and is called a database file.
  • the sequence in which the information processing apparatus reproduces the content recorded on the information recording medium is as follows.
  • a reproduction program associated with the designated title is selected.
  • a playlist that defines the playback order of contents is selected according to the program information of the selected playback program.
  • D) The AV stream or the command as the actual content data is read out by the clip information defined in the selected playlist, and the AV stream is reproduced and the command is executed.
  • FIG. 11 shows the following data recorded on the information recording medium (medium) 70, that is, Playlist files, Clip information file, Clip AV stream file, It is a figure explaining the correspondence of these data.
  • An AV stream made up of reproduction target data such as images, sounds, and subtitles as actual reproduction target data is recorded as a clip AV stream (Clip AV Stream) file, and further, as management information and reproduction control information file of these AV streams.
  • a playlist (PlayList) file and a clip information (Clip Information) file are defined.
  • a playlist layer including a playlist (PlayList) file, A clip layer consisting of a clip AV stream (Clip AV Stream) file and a clip information (Clip Information) file, It can be divided into these two layers.
  • One clip AV stream (Clip AV Stream) file is associated with one clip information (Clip Information) file, and these pairs are considered as one object, and these are grouped into a clip (Clip) or a clip. Called a file.
  • Clip Information Detailed information of data included in the clip AV stream file, for example, management information such as an EP map in which I picture position information of MPEG data is recorded is recorded in the clip information file.
  • the clip AV stream (Clip AV Stream) file stores data in which MPEG-2TS (transport stream) is arranged in accordance with the BDMV format specified structure.
  • the clip information (Clip Information) file is, for example, the data position of the byte string data of the clip AV stream file and the playback time position such as the playback start point when expanded on the time axis (entry point: EP). Management information for acquiring the reproduction start position of the data stored in the clip AV stream file, such as the corresponding data.
  • the playlist has information indicating an access point corresponding to a playback start position or playback end position of a clip (Clip) with a time stamp which is information on the time axis. For example, it is possible to acquire a data read position of a clip AV stream file, that is, an address as a playback start point by referring to the clip information file based on a time stamp indicating a playback time elapsed position from the start point of the content. Become.
  • the clip information file (Clip Information file) is used to find address information from which to start decoding the stream in the clip AV stream file from this time stamp.
  • Index files As described with reference to FIG. 10, as data stored in the information recording medium 70, Index files, Playlist files, Clip information file, Clip AV stream file, There are these files.
  • Reproduction target data such as main stream image data and substream image data constituting the 120p image described above is stored in a clip AV stream file.
  • Database files such as an index file, a playlist file, and a clip information file are files that store various data to be applied to the reproduction processing of reproduction target data stored in the clip AV stream file, and are stored in the clip AV stream file. It is possible to record attribute information of the data.
  • FIG. 12 is a diagram for explaining a specific example of image information to be stored for a playlist file and a clip information file, that is, high frame rate image-related image information.
  • high frame rate image related image information is, for example, the following information: . “High frame rate image related image information indicating whether or not a high frame rate image (120p image or the like) is included in the reproduction target data by the playlist”
  • the clip information file can be recorded by applying the clip information file and information related to the data can be recorded.
  • the image information recorded in the clip information file includes, for example: Become. "High frame rate image related image information indicating whether or not a high frame rate image (120p image or the like) is included in the reproduction target data associated with the clip information file"
  • the playlist file information relating to data reproduced by applying the playlist can be recorded, and the high frame rate image-related image recorded in the playlist file is recorded.
  • the information is, for example, the following information. "High frame rate image related image information indicating whether or not a high frame rate image (120p image or the like) is included in the reproduction target data of the playlist"
  • FIG. 13 is a diagram illustrating a data configuration example (syntax) of a playlist file.
  • the playlist file is reproduced by applying the playlist and information related to the data is recorded.
  • an extension data recording area [ExtensionData ()] 121 capable of recording various extension data is set in the playlist file.
  • ExtensionData an extension data identifier indicating what kind of extension data is associated with each extension data together with the extension data. To be recorded.
  • the extended data identifier is composed of two IDs (ID1, ID2).
  • ID1 0x0004
  • ID2 0x0001
  • High frame rate image related image information that is, the following image information, for example, is recorded in the extended data recording area associated with this identification information. "High frame rate image related image information indicating whether or not a high frame rate image (120p image or the like) is included in the reproduction target data of the playlist"
  • FIG. 14 is a diagram illustrating a configuration example (syntax) of a data recording area of high frame rate image-related image information recorded in the extended data recording area [ExtensionData ()] 121 of the playlist file illustrated in FIG. 13.
  • an extended data identifier (ID) recording area 122 and a data block (data_block) 123 are set in the extended data recording area 121 of the playlist file.
  • data_block a data block which is a recording area for high frame rate image-related image information is set.
  • FIG. 15 is a diagram showing a detailed configuration of the data block (data_block) 123 shown in FIG. That is, a specific data example of the high frame rate image related image information recorded in the playlist file is shown.
  • HEVC_video_info HEVC video information
  • Data length (length) 124 HEVC_video_info
  • streamPID Stream packet identifier
  • the stream packet identifier (streamPID) recording field corresponds to an identifier of a packet storing a substream that constitutes a 120p image, that is, a substream image that is not used for 60p image reproduction but is used only for 120p image reproduction. PID is recorded.
  • the playback device can identify the stored packet of the substream image with reference to the PID recorded in the stream packet identifier (streamPID) recording field.
  • a playback device that cannot perform 120p image playback that is, a playback device that performs 60p image playback, determines a storage packet of substream image data based on the PID recorded in the recording field, and images from the substream image storage packet.
  • a playback device that performs 120P image playback receives image data from both the packet having the PID recorded in the stream packet identifier (streamPID) recording field, that is, the substream image storage packet and other main stream image storage packets. By acquiring, it is possible to perform image reproduction combining the main stream and the substream, that is, 120p image reproduction.
  • streamPID stream packet identifier
  • the clip information file can record information related to reproduction target data associated with the clip information file, and a high frame rate image to be recorded in the clip information file.
  • the related image information is, for example, the following information. "High frame rate image related image information indicating whether or not a high frame rate image (120p image or the like) is included in the reproduction target data associated with the clip information file"
  • FIG. 16 is a diagram illustrating a data configuration example (syntax) of a clip information file.
  • the clip information file information related to reproduction data associated with the clip information is recorded.
  • the following information is recorded in the clip information file as information related to reproduction data associated with the clip information.
  • Clip information [ClipInfo ()], Sequence information [SequenceInfo ()], Program information [ProgramInfo ()],
  • Clip information [ClipInfo ()] records attribute information of the AV stream file corresponding to the clip information file.
  • the sequence information [SequenceInfo ()] records information related to the playback sequence of the playback target data stored in the AV stream file corresponding to the clip information file.
  • Program information [ProgramInfo ()] will be described.
  • the recording information of the program information [ProgramInfo ()] will be described with reference to FIG.
  • Program information [ProgramInfo ()] records information about a program (program_sequence) including definition information of a playback section and a time section of a clip AV stream played back by a clip information file.
  • ProgramInfo shown in FIG. 17 The main data recorded in ProgramInfo shown in FIG. 17 will be described.
  • A In the number of program sequences [num_of_program_sequences] 131, the number of program sequences (program_sequence) included in the clip information file is recorded.
  • B The SPN program sequence start address [SPN_program_sequence_start [i]] 132 records a relative address where the program sequence starts on the AV stream file.
  • C In the program map PID [program_map_PID [i]] 133, an identifier (PID) of a TS packet storing a map of the program sequence (program_sequence) is recorded.
  • an identifier (PID) of a TS packet storing a stream to be reproduced according to the program sequence of the clip information file is recorded.
  • this packet identifier (PID) is a packet identifier of a TS packet storing a main stream applied to 60p image reproduction, for example.
  • this packet identifier is a packet identifier of a TS packet storing a main stream and a substream applied to 120p image reproduction.
  • (E) Stream coding information [StreamCodingInfo] 135 records coding (encoding) information of a stream to be played.
  • (F) Number of streams in group [num_of streams_in_groups] 136 records the number of streams included in the reproduction target data group.
  • (G) Stream index reference information [ref_to_stream_index] 137 records attribute information of streams included in the reproduction target data group.
  • FIG. 18 is a diagram illustrating a data configuration example of stream coding information [StreamCodingInfo] set in the program information [ProgramInfo ()] recording area of the clip information file. The following data is recorded in the stream coding information [StreamCodingInfo].
  • A Stream coding type [stream_coding_type] 141
  • C video stream information 143
  • E audio stream information 145,
  • Video format (video_format)
  • Frame rate (frame_rate)
  • aspect ratio (aspect_ratio)
  • Each of the above information (1) to (3) can be individually recorded as information about the main stream and information about the sub-stream, and the playback device depends on the stream to be played back by the playback device. Information can be acquired, and reproduction processing according to the acquired information can be performed.
  • FIG. 19 shows the following information recording example regarding a video stream as stream coding information [StreamCodingInfo].
  • A Video format (video_format) information recording example
  • B Frame rate (frame_rate) information recording example
  • a playback device capable of only 60p image playback processing uses the frame rate information shown in FIG. (1) Recording bit value [7 (0111)]: Meaning [60 f / s] (2) Recording bit value [8 (1000)]: Meaning [60 f / s] Only the stream in which the frame rate information of 60 f / s as described above is recorded is selected and reproduced. With this reproduction process, main stream selective reproduction of 60p images becomes possible.
  • a playback device capable of playing back 120p images combines a stream in which frame rate information of 60 f / s is recorded and a stream in which frame rate information of 120 f / s is recorded as the frame rate information shown in FIG. To play.
  • This reproduction process enables 120p image reproduction combining the main stream and the substream.
  • the number of streams in group [num_of streams_in_groups] 136 the number of streams included in the reproduction target data group is recorded.
  • the stream index reference information [ref_to_stream_index] 137 attribute information of streams included in the reproduction target data group is recorded.
  • FIG. 20 shows a recording example of each of the following information when the 120p image is included in the image data that is the reproduction target data of the clip information file, that is, when the main stream image and the substream image are included. ing. Number of streams in group [num_of streams_in_groups], Stream index reference information [ref_to_stream_index],
  • [2] is recorded as the recording information of the number of streams 151 in the group. This is, Mainstream substream, It means that these two streams are streams associated with this clip information file.
  • stream index reference information As shown in FIG. Main stream information 152 for 60p image reproduction, 120p image playback main stream + substream 2-stream information 153, These stream index reference information is recorded.
  • the main stream information 152 for 60p image reproduction is composed of the following pieces of information (index information), for example.
  • Group 1 60Hz (60f / s) compatible video As voice data, Japanese voice and English voice are included.
  • the above information includes a packet identifier (PID) of a TS packet storing a main stream image used for both 60p image reproduction and 120p image reproduction.
  • a playback device that plays back a 60p image can acquire a playback target image (60p image) and audio information from the main stream information 152 for playing back the 60p image.
  • the 120p image playback main stream + substream 2-stream information 153 includes, for example, the following pieces of information.
  • the above information includes a packet identifier (PID) of a TS packet storing a main stream image used for 120p image reproduction and a TS packet storing a substream image.
  • a playback device that plays back a 120p image can acquire a playback target image (120p image) and audio information from the 120p image playback main stream + substream 2-stream information 153.
  • the information processing apparatus converts high frame rate image data such as a 120p image recorded in the MMT format into the MPEG-2TS format and converts the information recording medium such as a BD or a flash memory. To record. Further, in accordance with this format conversion, information indicating that a high frame rate image is recorded in the clip AV stream file in the playlist or at least one database file of the clip information file, reproduction processing of the 60P image, Alternatively, information for selecting and executing any of the 120p image reproduction processes is recorded.
  • FIG. 21 is a diagram illustrating a configuration of an information processing device 300 that executes data recording processing on an information recording medium such as a BD.
  • the information processing apparatus 300 stores, in an information recording medium (recording medium) 320 shown in FIG. 21, image data in accordance with the MPEG-2TS format, and a playlist, clip information file, and the like in which high frame rate image related image information is recorded. Record the database file.
  • the data input unit 301 inputs MMT format data 331 for the information recording medium 320, that is, MMT format data 331 including image data, audio data, caption data, and the like.
  • the data input unit 301 is a receiving unit that transmits MMT format data 331, for example, a receiving unit that receives transmission data from a broadcasting station, a content server, or the like, or a media reading unit that reads data from a medium on which MMT format data 331 is recorded. Composed of etc.
  • the MMT format data 331 input from the data input unit 301 is data according to the data format described above with reference to FIG. 1 and includes high frame rate image data such as a 120p 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 data recording start request for the information recording medium 320.
  • the control unit 401 analyzes the MMT format data 331, determines whether or not the MMT format data 331 includes a high frame rate image such as a 120p image, and controls the format conversion processing mode according to the determination information.
  • 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 acquires packets storing data such as images, sounds, and captions from the MMT format data 331, classifies the packets into data type packets, and multiplexes each packet according to the data type.
  • the data is input to the caption data conversion unit 311, the image data conversion unit 312, and the audio data conversion unit 313 of the conversion processing unit 306.
  • the caption data conversion unit 311 acquires caption data from the MMT format data 331 input by the data input unit 301 and stored in the storage unit 304, and converts it into MPEG-2TS format data.
  • the image data conversion unit 312 acquires image data from the MMT format data 331 input by the data input unit 301 and stored in the storage unit 304, and converts it into MPEG-2TS format data.
  • the audio data conversion unit 313 acquires audio data from the MMT format data 331 input by the data input unit 301 and stored in the storage unit 304, and converts it into MPEG-2TS format data.
  • the format conversion process from the MMT format data to the MPEG-2TS format data is a process according to the process described above with reference to FIGS. Note that the format conversion process described with reference to FIGS. 6 to 9 has been described only for image data, but the format conversion is performed in the same processing sequence for other audio and subtitle data.
  • a multiplexer (MUX) 314 inputs subtitle, image, and audio data converted by the subtitle data conversion unit 311, the image data conversion unit 312, and the audio data conversion unit 313, and a transport stream file (TS) that stores these data. File).
  • MUX multiplexer
  • control unit 401 analyzes the MMT format data 331, determines whether or not the MMT format data 331 includes a high frame rate image such as a 120p image, and generates a database file according to the determination information. . That is, management data and a reproduction control information file to be recorded on the information recording medium 520 are generated. Specifically, recording data including a database file such as a playlist file or a clip information file in which the above-described high frame rate image related image information is recorded is generated.
  • Recording data 332 including a database file such as a playlist file or a clip information file in which the MPEG-2TS format data generated by the multiplexing processing unit 306 and the high frame rate image-related image information generated by the control unit 303 are recorded. Under the control of the unit 303, the recording unit 306 outputs and records the information on the information recording medium 320 via the drive 307.
  • the processing according to the flow shown in FIG. 22 may be executed under the control of a data processing unit (control unit) including a CPU having a program execution function, for example, according to a program stored in the storage unit of the information processing apparatus. it can.
  • a data processing unit control unit
  • CPU central processing unit
  • program execution function for example, according to a program stored in the storage unit of the information processing apparatus.
  • Step S101 First, in step S101, the information processing apparatus 300 inputs MMT format data that is recording data via the data input unit 301.
  • the recording data includes image data, audio data, caption data, and the like. In this flow, only image data format conversion and recording processing will be described.
  • the image data includes a high frame rate image such as a 120p image.
  • Step S102 the control unit 303 determines whether or not to execute high frame rate image recording such as a 120p image.
  • a playback device or display device that plays back recorded data on the information recording medium 320 on which MPEG-2TS format data after format conversion is played back can perform 120p image playback, high-frame-rate image recording such as 120p images is performed. Determine to execute.
  • the playback device or the display device cannot execute 120p image playback, it is determined not to execute high-frame-rate image recording such as a 120p image. This determination process can be executed based on input information from the user input unit.
  • the determination may be made based on the reproduction function. If it has a 120p image playback function, it is determined that 120p image recording is performed, and if it does not have it, it is determined that 120p image recording is not performed.
  • step S102 If it is determined in step S102 that image recording at a high frame rate such as a 120p image is to be executed, the process proceeds to step S111. If it is determined not to be performed, the process proceeds to step S103.
  • Step S103 First, a process when it is determined in step S102 that image recording at a high frame rate such as a 120p image is not executed will be described. Note that the processing in steps S103 to S104 is processing corresponding to the format conversion processing described above with reference to FIGS.
  • step S103 a packet storing a main stream image that can be used for both 120p image reproduction and 60p image reproduction is selected from the MMT format data, and image data corresponding to the main stream is extracted.
  • Step S104 the image data corresponding to the main stream extracted from the MMT format data in step S103 is stored in a TS packet defined in the MPEG-2 TS format. That is, the main corresponding TS packet shown in FIG.
  • This process is a process for recording video format information and frame rate information for the program information recording area of the clip information file described above with reference to FIG.
  • step S105 (A) video format (video_format) information in the example shown in FIG. (1) Recording bit value [5 (0101)]: Meaning [1080p (2K progressive image)] (2) Recording bit value [8 (1000)]: Meaning [2160p (4K progressive image)] (3) Recording bit value [9 (1001)]: Meaning [4320p (8K progressive image)] Record one of these.
  • the playback device can determine that the image data played back by data playback according to the clip information file is a 60p image.
  • Step S111 Next, processing when it is determined in step S102 that image recording at a high frame rate such as a 120p image is executed will be described. Note that the processing of steps S111 to S112 is processing equivalent to the format conversion processing described above with reference to FIGS.
  • a media fragment unit (MFU: Media Fragment unit) that stores image data in MMT format data is separated into the following two MFUs.
  • MFU Media Fragment unit
  • A a main stream MFU storing main stream image data
  • B Substream MFU storing substream image data
  • This MFU separation processing corresponds to the separation processing of (2a) main MFU and (2b) sub MFU shown in FIG. 6 described above. This MFU separation process is executed based on the packet identifier of the MMTP packet.
  • Step S112 a main stream compatible TS packet in which main stream image data extracted from the main stream MFU is stored in a TS bucket and a sub stream compatible TS packet in which sub stream image data extracted from the sub stream MFU is stored in a TS bucket are generated. .
  • This stream-compatible TS packet generation process is a process corresponding to the generation process of (5a) main-compatible TS and (5b) sub-compatible TS shown in FIG.
  • step S112 a different packet identifier (PID) corresponding to the stream is set in each of the (5a) main corresponding TS packet and (5b) sub corresponding TS packet shown in FIG. 7, and the multiplexing process is executed.
  • This TS packet multiplexing process is a process corresponding to the (6) main / sub-included TS packet generation process shown in FIG. 7 described above.
  • the playback device can perform playback processing (60p image playback) in which only the main stream is selected based on the PID, It is possible to execute playback processing (120p image playback) in which both streamed substreams are selected.
  • PID packet identifier
  • This process is a process for recording video format information and frame rate information for the program information recording area of the clip information file described above with reference to FIG.
  • step S113 (A) video format (video_format) information in the example shown in FIG. (1) Recording bit value [5 (0101)]: Meaning [1080p (2K progressive image)] (2) Recording bit value [8 (1000)]: Meaning [2160p (4K progressive image)] (3) Recording bit value [9 (1001)]: Meaning [4320p (8K progressive image)] Record one of these.
  • the playback device can determine that the image data played back by data playback according to the clip information file can be played back as a 60p image.
  • This process is a process for recording video format information and frame rate information for the program information recording area of the clip information file described above with reference to FIG.
  • step S114 as in the process of step S113, (A) video format (video_format) information in the example shown in FIG. (1) Recording bit value [5 (0101)]: Meaning [1080p (2K progressive image)] (2) Recording bit value [8 (1000)]: Meaning [2160p (4K progressive image)] (3) Recording bit value [9 (1001)]: Meaning [4320p (8K progressive image)] Record one of these.
  • the playback apparatus can determine that the image data played back by data playback according to the clip information file is a substream image that can be played back as a 120p image.
  • Step S115 Further, in step S115, a process of registering group information (group information) in clip information (Clip information file) is executed.
  • This process is the information registration process described above with reference to FIG. As described with reference to FIG. As described with reference to FIG. As described with reference to FIG. As the number of streams in the group [num_of streams_in_groups], [2] indicating that the main stream and the substream exist is recorded. Furthermore, in the stream index reference information [ref_to_stream_index], as shown in FIG. Main stream information 152 for 60p image reproduction, 120p image playback main stream + substream 2-stream information 153, These stream index reference information is recorded.
  • a playback device that plays back a 60p image can acquire an image to be played back (60p image) and audio information from the main stream information 152 for 60p image playback shown in FIG.
  • a playback device that plays back a 120p image can acquire a playback target image (120p image) and audio information from the 120p image playback main stream + substream 2-stream information 153 shown in FIG.
  • Step S116 Next, HEVC video information (HEVC_video_Info ()) is recorded in a playlist file (PlayList_file) serving as playback control information for the image stream that has undergone format conversion.
  • HEVC_video_Info ()
  • PlayList_file serving as playback control information for the image stream that has undergone format conversion.
  • HEVC_video_info HEVC video information [HEVC_video_info] in a playlist file (PlayList_file).
  • Data length length
  • streamPID Stream packet identifier
  • the stream packet identifier corresponds to an identifier of a packet storing a substream that constitutes a 120p image, that is, a substream image that is not used for 60p image reproduction but is used only for 120p image reproduction. PID to be recorded.
  • the playback device can identify the stored packet of the substream image with reference to the PID recorded in the stream packet identifier (streamPID) recording field.
  • a playback device that cannot perform 120p image playback that is, a playback device that performs 60p image playback, determines a storage packet of substream image data based on the PID recorded in the recording field, and images from the substream image storage packet.
  • a playback device that performs 120P image playback receives image data from both the packet having the PID recorded in the stream packet identifier (streamPID) recording field, that is, the substream image storage packet and other main stream image storage packets. By acquiring, it is possible to perform image reproduction combining the main stream and the substream, that is, 120p image reproduction.
  • streamPID stream packet identifier
  • the above is the process executed by the information processing apparatus 300 shown in FIG. 21 in the conversion process from the MMT format data to the MPEG-2TS format.
  • the information processing apparatus 300 shown in FIG. 21 combines the MPEG-2TS format data obtained as a result of execution according to the flow shown in FIG. 22 and the database file including the playlist and clip information file, with reference to FIG. Data according to the directory structure described above is generated and recorded in the information recording medium 320 shown in FIG.
  • An information processing apparatus that executes reproduction processing reads MPEG-2TS format data recorded on an information recording medium attached to the apparatus and executes reproduction processing.
  • this playback process if the information processing apparatus has a 120p image playback function, 120p image playback is executed. That is, the reproduction process using the main stream and the substream is executed.
  • the information processing apparatus does not have a 120p image playback function, 60p image playback is executed. That is, the reproduction process of only the main stream is executed without using the substream.
  • FIG. 23 is a diagram showing a configuration of an information processing apparatus 400 that executes a reproduction process of data recorded on an information recording medium 510 such as a BD.
  • the information processing apparatus 400 reads the data recorded on the information recording medium (recording medium) 510 shown in FIG. 23 and outputs the data to the output device (display unit + speaker) 520.
  • the output device 520 is, for example, a television or the like, and is a display device that includes a display, a speaker, and the like.
  • An information recording medium (recording medium) 510 is a recording medium on which MPEG-2TS format data generated by the processing described with reference to FIGS. 21 and 22 and a database such as a playlist and a clip information file are recorded. .
  • a high frame rate image such as a 120p image is recorded in the clip AV stream file. Further, the above-described high frame rate image related image information is recorded in each of the playlist file and the clip information file.
  • control unit 401 reads the recording data of the information recording medium 510 via the recording / reproducing unit 404 and the drive 403 based on the input of the reproduction instruction information from the user input unit 402, and the storage unit 405 as a data buffer. And the stored data is output to the reproduction processing unit 406.
  • control unit 401 executes communication with the output device (display unit + speaker) 520 via the input / output interface 407.
  • the control unit 401 analyzes high frame rate image related image information recorded in a database file such as an index file, a playlist file, or a clip information file read from the information recording medium 510. Further, based on the analysis result, the reproduction processing unit 406 generates reproduction data necessary for the display process, and executes control to output to the output device (display unit + speaker) 520.
  • the playback processing unit 406 obtains each data from the playback data read from the information recording medium 510 under the control of the control unit 401, that is, from the clip AV stream file storing each data such as image, sound, and subtitle. To generate playback data.
  • the demultiplexer (DeMUX) 411 acquires a data storage packet that configures a clip AV stream file storing each data such as image, sound, and caption, classifies the packet into data type packets, and sets each packet according to the data type. And output to the caption data generation unit 412, the image data generation unit 413, and the audio data generation unit 414.
  • the caption data generation unit 412, the image data generation unit 413, and the audio data generation unit 414 execute a decoding process of the data stored in the packet and output the decoded data to the output data generation unit 415.
  • the output data generation unit 415 outputs subtitle, image, and audio data to the output device (display unit + speaker) 520 via the input / output interface 407.
  • the image data generation unit 415 determines whether the image data stored in the TS packet in the MPEG-2 TS format data read from the information recording medium 510 is 120p image data under the control of the control unit 401. Depending on whether or not the processing device 400 has a 120p image playback function, a process for generating reproducible image data is executed. Details of this processing will be described later with reference to the flow shown in FIG.
  • the output device (display unit + speaker) 520 outputs data such as subtitles, images, and audio input from the information processing device 400 via the output device (display unit + speaker) 520.
  • the processing according to the flow shown in FIG. 24 is executed under the control of a data processing unit (control unit) including a CPU having a program execution function, for example, according to a program stored in the storage unit of the information processing apparatus 400. Can do.
  • a data processing unit control unit
  • a CPU having a program execution function
  • the information processing apparatus that executes the processing according to the flow shown in FIG. 24 is the information processing apparatus 400 shown in FIG. 23.
  • the information recording medium (recording medium) 510 is attached and recorded in the attached information recording medium 510.
  • the read data is read and output to the output device (display unit + speaker) 520.
  • the output device 520 is, for example, a television or the like, and is a display device that includes a display, a speaker, and the like.
  • An information recording medium (recording medium) 510 is a recording medium on which MPEG-2TS format data generated by the processing described with reference to FIGS. 21 and 22 and a database such as a playlist and a clip information file are recorded. .
  • the processing of each step shown in the flow of FIG. 24 will be sequentially described.
  • Step S201 First, in step S ⁇ b> 201, the control unit 401 of the information processing apparatus 400 inputs a playback instruction specifying a playlist (PlayList) that is playback control information corresponding to a high frame rate image (120p image) from the user input unit 402. .
  • PlayList a playlist that is playback control information corresponding to a high frame rate image (120p image) from the user input unit 402. .
  • Step S202 the control unit 401 determines whether or not the own apparatus, that is, the information processing apparatus 400 has a function of reproducing a high frame rate image such as a 120p image.
  • This determination process may be executed based on function information recorded in a memory or the like of the information processing apparatus 400 or may be executed based on an input from the user input unit 402. If it is determined in step S202 that the image reproduction function has a high frame rate such as a 120p image, the process proceeds to step S211. If it is determined that the function is not provided, the process proceeds to step S203.
  • Step S203 First, a process when it is determined in step S202 that the information processing apparatus 400 does not have a function of reproducing a high frame rate image such as a 120p image will be described.
  • the processing executed in steps S203 to S205 is not the reproduction of the high frame rate image (120p image) but the reproduction processing of the 60p image, that is, the reproduction processing of the 60p image using only the main stream.
  • This is the same processing as the 60p image reproduction example of FIG. 4 (3) described above with reference to FIG.
  • step S203 the playlist that is the playback control information specified in step S201 is read from the information recording medium, and preparation for playback processing according to the recorded information of the playlist is executed.
  • image information HEVC_video_info ()
  • the image information (HEVC_video_info ()) recorded in the playlist is the information described above with reference to FIG.
  • the stream packet identifier (streamPID) 125 is recorded in the image information (HEVC_video_info ()) recorded in the playlist.
  • the stream packet identifier (streamPID) recording field corresponds to an identifier of a packet storing a substream that constitutes a 120p image, that is, a substream image that is not used for 60p image reproduction but is used only for 120p image reproduction. PID is recorded.
  • the playback device can identify the stored packet of the substream image with reference to the PID recorded in the stream packet identifier (streamPID) recording field.
  • a playback device that performs 60p image playback performs playback using only the main stream image, and only needs to acquire the PID of the packet storing the main stream image data.
  • the PID of the packet storing the main stream image data is acquired from the clip information file associated with the playlist in the next step S204.
  • Step S204 the control unit 401 acquires a clip information file (Clip information file) associated with the playlist, reads program information (ProgramInfo ()) of the clip information file (Clip information file), and A packet identifier (PID) of a TS packet storing a main stream image necessary for 60p image reproduction is acquired.
  • ClipInfo program information
  • PID packet identifier
  • the stream PID [stream_PID] 134 is recorded in the program information (ProgramInfo ()) of the clip information file (Clip information file). That is, an identifier (PID) of a TS packet storing a stream to be played back according to the program sequence of the clip information file is recorded.
  • this packet identifier is a packet identifier of a TS packet storing a main stream applied to 60p image reproduction, for example.
  • the packet identifier (PID) of the TS packet storing the main stream applied to 60p image playback is acquired from the program information (ProgramInfo ()) of the clip information file (Clip information file).
  • Step S205 the TS packet is selected and extracted based on the identifier (PID) of the TS packet storing the main stream image acquired in step S204, and the TS packet storing the main stream image is extracted from the TS packet sequence. Only the data is selected, the data is taken out, the decoding process is executed, and the reproduction process is performed.
  • PID the identifier
  • the stream reproduced in this reproduction process is only the main stream to which no substream is applied, and is a reproduction process of a 60p image. That is, the reproduction process of the 60p image using only the main stream shown in FIG.
  • Step S211 Next, processing in step S211 and subsequent steps when it is determined in step S202 that the information processing apparatus 400 has a high frame rate image reproduction function such as a 120p image will be described.
  • steps S211 to S214 is the reproduction of a high frame rate image (120p image). This is the same processing as the 120p image reproduction example of FIG. 4 (2) described above with reference to FIG.
  • Steps S211 to S213 are processes for confirming the identifier (PID) of the TS packet storing the main stream and substream images used for 120p image reproduction. Therefore, it is not essential to perform all the processes in steps S211 to S213, and any process may be executed to obtain the identifier (PID) of the TS packet storing the main stream and substream images.
  • step S211 the playlist that is the playback control information specified in step S201 is read from the information recording medium, and preparation for playback processing according to the recorded information of the playlist is executed.
  • step S211 unlike the process of step S203 at the time of 60p image reproduction described above, reading of image information (HEVC_video_info ()) recorded in the playlist is executed.
  • the stream packet identifier (streamPID) 125 is recorded in the image information (HEVC_video_info ()) recorded in the playlist.
  • the stream packet identifier (streamPID) recording field corresponds to an identifier of a packet storing a substream that constitutes a 120p image, that is, a substream image that is not used for 60p image reproduction but is used only for 120p image reproduction. PID is recorded.
  • the playback device can identify the stored packet of the substream image with reference to the PID recorded in the stream packet identifier (streamPID) recording field.
  • a playback device that performs 120p image playback performs playback using both the main stream and the substream.
  • the packet identifier (PID) of the storage packet of the substream image is acquired from the image information (HEVC_video_info ()) recorded in the playlist.
  • Step S212 the control unit 401 acquires a clip information file (Clip information file) associated with the playlist, reads program information (ProgramInfo ()) of the clip information file (Clip information file), and Another stream necessary for 120p image reproduction, that is, the packet identifier (PID) of the TS packet storing the main stream image is acquired.
  • ClipInfo program information
  • PID packet identifier
  • the stream PID [stream_PID] 134 is recorded in the program information (ProgramInfo ()) of the clip information file (Clip information file). That is, an identifier (PID) of a TS packet storing a stream to be played back according to the program sequence of the clip information file is recorded.
  • this packet identifier is a packet identifier of a TS packet storing a main stream and a substream applied to 120p image reproduction, for example.
  • the packet identifier (PID) of the TS packet storing the main stream and substream applied to 120p image playback is acquired from the program information (ProgramInfo ()) of the clip information file (Clip information file).
  • Step S213 the control unit 401 reads the group information of the clip information file (Clip information file), and stores the streams necessary for 120p image playback, that is, the main stream and substream images.
  • the packet identifier (PID) of the TS packet is acquired.
  • the above information includes a packet identifier (PID) of a TS packet storing a main stream image used for 120p image reproduction and a TS packet storing a substream image.
  • PID packet identifier
  • step S213 the packet information (PID) of the TS packet storing the main stream image used for 120p image playback and the TS packet storing the substream image used for 120p image playback is acquired with reference to the group information.
  • PID packet information
  • steps S211 to S213 include the process of acquiring identifiers (PIDs) of the main stream and substream image storage TS packets used for 120p image reproduction. Therefore, the packet ID acquisition process in these processes (steps S211 to S213) may be set to be executed in any step.
  • PIDs identifiers
  • Step S214 a TS packet is selected based on the identifier (PID) of the TS packet storing the main stream image and the substream image, data is extracted, decoding processing is executed, and playback processing is performed.
  • PID identifier
  • the streams to be played back in this playback processing are both the main stream and the substream, and are 120p image playback processing. That is, the reproduction process of the 120p image using the main stream and the substream shown in FIG.
  • a CPU (Central Processing Unit) 601 functions as a data processing unit that executes various processes according to a program stored in a ROM (Read Only Memory) 602 or a storage unit 608. For example, processing according to the sequence described in the above-described embodiment is executed.
  • a RAM (Random Access Memory) 603 stores programs executed by the CPU 601 and data. These CPU 601, ROM 602, and RAM 603 are connected to each other by a bus 604.
  • the CPU 601 is connected to an input / output interface 605 via a bus 604, and an input unit 606 including various switches, a keyboard, a mouse, and a microphone, and an output unit 607 including a display and a speaker are connected to the input / output interface 605. Yes.
  • the CPU 601 executes various processes in response to commands input from the input unit 606 and outputs the processing results to the output unit 607, for example.
  • the storage unit 608 connected to the input / output interface 605 includes, for example, a hard disk and stores programs executed by the CPU 601 and various data.
  • the communication unit 609 functions as a data communication transmission / reception unit via a network such as the Internet or a local area network, and further as a broadcast wave transmission / reception unit, and communicates with an external device.
  • the drive 610 connected to the input / output interface 605 drives a removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory such as a memory card, and executes data recording or reading.
  • a removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory such as a memory card
  • the technology disclosed in this specification can take the following configurations. (1) having a data processing unit for converting MMT format data into MPEG-2TS format;
  • the data processing unit An MPEG-2TS that stores only the main stream that constitutes the image data included in the MMT format data and the substream in the TS packet in which different packet identifiers (PIDs) are set, and that allows selective reproduction of only the main stream based on the PID
  • PIDs packet identifiers
  • the data processing unit further includes: The information processing apparatus according to (1), wherein the generated MPEG-2TS format data is recorded on an information recording medium.
  • the MMT format data includes a main stream and a substream as image data applied to high frame rate image reproduction.
  • High frame rate image playback is performed by image playback using both the main stream and substream.
  • the data processing unit High frame rate image reproduction using both main stream and substream in the reproduction control information file of the MPEG-2TS format data, Alternatively, image information for selectively performing either low frame rate image reproduction using only the main stream is stored, The information processing apparatus according to any one of (1) to (3), wherein the information is recorded together with the MPEG-2TS format data on an information recording medium.
  • the data processing unit In the playlist file used as reproduction control information of the MPEG-2TS format data, The information processing apparatus according to (4) or (5), wherein an identifier (PID) of a packet storing the substream is recorded.
  • PID identifier
  • the data processing unit In the program information recording area of the clip information file used as reproduction control information of the MPEG-2TS format data, An identifier (PID) of a packet storing the main stream; The information processing apparatus according to any one of (4) to (6), wherein an identifier (PID) of a packet storing the substream is recorded.
  • the information recording medium is A main stream used for both high frame rate image playback and low frame rate image playback, and a substream used only for high frame rate playback are stored in TS packets according to the MPEG-2TS format for each stream.
  • Image data The image data reproduction control information is recorded,
  • the data processing unit From the playback control information, obtain a packet identifier (PID) corresponding to a stream capable of distinguishing a main stream storage packet and a substream storage packet;
  • PID packet identifier
  • An information processing apparatus that identifies each stream storage packet using an acquired packet identifier (PID) and performs image reproduction in units of streams.
  • the data processing unit Based on the packet identifier (PID) obtained from the playback control information, High frame rate image playback processing using both main stream and sub stream, or The information processing apparatus according to (8), wherein one of low frame rate image reproduction processing based on only the main stream is selectively executed.
  • PID packet identifier
  • reproduction control information file is a playlist file or a clip information file.
  • the data processing unit From a playlist file used as reproduction control information of the MPEG-2TS format data, The information processing apparatus according to any one of (8) to (10), wherein an identifier (PID) of a packet storing the substream is acquired.
  • PID identifier
  • the data processing unit From the program information recording area of the clip information file used as reproduction control information of the MPEG-2TS format data, An identifier (PID) of a packet storing the main stream;
  • PID identifier
  • a main stream used for both high frame rate image reproduction and low frame rate image reproduction, and a substream used only for high frame rate reproduction are streamed into TS packets according to the MPEG-2 TS format.
  • An information recording medium that records reproduction control information of the image data, In the playback control information, a packet identifier (PID) corresponding to a stream capable of distinguishing a main stream storage packet and a substream storage packet is set.
  • PID packet identifier
  • a playback device that executes image playback from an information recording medium An information recording medium capable of identifying each stream storage packet by using a packet identifier (PID) read from the reproduction control information and performing image reproduction in units of streams.
  • the information processing apparatus includes: A data processing unit for converting MMT format data into MPEG-2TS format;
  • the data processing unit is An MPEG-2TS that stores only the main stream that constitutes the image data included in the MMT format data and the substream in the TS packet in which different packet identifiers (PIDs) are set, and that allows selective reproduction of only the main stream based on the PID
  • PIDs packet identifiers
  • the information processing apparatus includes: A data processing unit for executing a reproduction process of recorded data of the information recording medium;
  • the information recording medium is A main stream used for both high frame rate image playback and low frame rate image playback, and a substream used only for high frame rate playback are stored in TS packets according to the MPEG-2TS format for each stream.
  • Image data The image data reproduction control information is recorded,
  • the data processing unit is From the playback control information, obtain a packet identifier (PID) corresponding to a stream capable of distinguishing a main stream storage packet and a substream storage packet;
  • PID packet identifier
  • a program for executing information processing in an information processing device includes: A data processing unit for converting MMT format data into MPEG-2TS format; The program is stored in the data processing unit.
  • An MPEG-2TS that stores only the main stream that constitutes the image data included in the MMT format data and the substream in the TS packet in which different packet identifiers (PIDs) are set, and that allows selective reproduction of only the main stream based on the PID A program that generates format data.
  • PIDs packet identifiers
  • a program for executing information processing in an information processing device includes: A data processing unit for executing a reproduction process of recorded data of the information recording medium;
  • the information recording medium is A main stream used for both high frame rate image playback and low frame rate image playback, and a substream used only for high frame rate playback are stored in TS packets according to the MPEG-2TS format for each stream.
  • Image data The image data reproduction control information is recorded,
  • the program is stored in the data processing unit. From the reproduction control information, a stream-corresponding packet identifier (PID) capable of distinguishing a main stream storage packet and a substream storage packet is acquired, A program for identifying each stream storage packet using the acquired packet identifier (PID) and executing image reproduction in units of streams.
  • PID packet-corresponding packet identifier
  • the series of processes described in the specification can be executed by hardware, software, or a combined configuration of both.
  • the program recording the processing sequence is installed in a memory in a computer incorporated in dedicated hardware and executed, or the program is executed on a general-purpose computer capable of executing various processing. It can be installed and run.
  • the program can be recorded in advance on 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.
  • the various processes described in the specification are not only executed in time series according to the description, but may be executed in parallel or individually according to the processing capability of the apparatus that executes the processes or as necessary.
  • the system is a logical set configuration of a plurality of devices, and the devices of each configuration are not limited to being in the same casing.
  • a configuration in which a high frame rate image according to the MMT format is recorded as the MPEG-2TS format and can be played back is realized.
  • the main stream and substream according to the MMT format are stored in different packet identifier (PID) setting packets, and MPEG-2TS format data that enables selective playback in units of streams based on the PID is recorded. Record on media.
  • the playback apparatus acquires a stream-corresponding packet identifier (PID) from the playback control information, identifies each stream storage packet using the acquired PID, and executes image playback in units of streams.
  • PID packet identifier

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

La présente invention permet l'enregistrement, dans un format MPEG-2 TS, et la lecture d'une image à fréquence de trames élevée sur la base d'un format MMT. Des données de format MPEG-2 TS dans lesquelles un flux principal et un sous-flux basé sur le format MMT sont stockés dans des paquets de réglage de différents identifiants de paquet (PID) et qui permettent une sélection et une lecture dans des unités de flux sur la base des PID sont enregistrées sur un support d'enregistrement. Un appareil de lecture acquiert des identifiants de paquet (PID) prenant en charge des flux à partir d'informations de commande de lecture, identifie des paquets de stockage de flux à l'aide des PID acquis, et exécute une lecture d'image dans des unités de flux.
PCT/JP2017/017113 2016-05-18 2017-05-01 Appareil de traitement d'informations, support d'enregistrement d'informations, et procédé de traitement d'informations, et programme WO2017199743A1 (fr)

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WO2020011205A1 (fr) * 2018-07-11 2020-01-16 上海交通大学 Procédé et système de conversion de protocole de transport basé sur un système de diffusion
CN111491181A (zh) * 2019-01-29 2020-08-04 上海交通大学 基于广播系统的传输协议转换方法和系统及存储介质

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