WO2016002495A1 - 情報処理装置および方法 - Google Patents
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- WO2016002495A1 WO2016002495A1 PCT/JP2015/067233 JP2015067233W WO2016002495A1 WO 2016002495 A1 WO2016002495 A1 WO 2016002495A1 JP 2015067233 W JP2015067233 W JP 2015067233W WO 2016002495 A1 WO2016002495 A1 WO 2016002495A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
- H04N19/436—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation using parallelised computational arrangements
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- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/119—Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
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- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
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- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
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- H04N19/189—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
- H04N19/196—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters
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- H04N21/854—Content authoring
- H04N21/85406—Content authoring involving a specific file format, e.g. MP4 format
Definitions
- the present technology relates to an information processing apparatus and method, and more particularly, to an information processing apparatus and method capable of realizing selection of a reproduction file in accordance with a reproduction side capability.
- MPEG-DASH Moving Picture Experts Group Dynamic-Adaptive Streaming Over HTTP
- HTTP HyperText Transfer Protocol
- MPEG-DASH multiple encoded data in which the same content is expressed at different bit rates are stored in the content server, and the client selects one of the multiple encoded data according to the network bandwidth.
- ABS Adaptive Bitrate Streaming
- MPEG-DASH Dynamic-Adaptive-Streaming-over-HTTP
- URL http://mpeg.chiariglione.org/standards/mpeg-dash/media-presentation-description-and-segment-formats/text-isoiec-23009-12012-dam -1)
- the conventional MPEG-DASH standard does not have a function for notifying the client side of various parameters related to files.
- the present technology has been proposed in view of such a situation, and an object thereof is to realize selection of a reproduction file in accordance with the reproduction side ability.
- One aspect of the present technology includes metadata on a plurality of files including encoded data obtained by encoding image data, and metadata for controlling reproduction of the plurality of files, the information regarding the encoding parameters of each file It is an information processing apparatus provided with the metadata production
- the information related to the encoding parameter can include information indicating a parallel processing type of the encoding of the image data.
- the information indicating the parallel processing type may include identification information for identifying whether the parallel processing type is tile division or wavefront parallel processing.
- the information indicating the parallel processing type may include identification information for identifying whether the parallel processing type is slice division, tile division, or wavefront parallel processing.
- the information related to the encoding parameter can include information indicating the maximum size that can be taken by the segmentation.
- the metadata generation unit can set information on the encoding parameter in the representation.
- the metadata generation unit can set information on the encoding parameter as a value of a supplemental property.
- One aspect of the present technology is also metadata that includes information on a plurality of files including encoded data obtained by encoding image data, and controls reproduction of the plurality of files, the encoding parameter of each file It is the information processing method which produces
- Metadata that includes information on a plurality of files including encoded data obtained by encoding image data, and controls reproduction of the plurality of files, and relates to encoding parameters of each file
- a metadata analysis unit that analyzes the metadata including information, a file selection unit that selects a file to be reproduced from the plurality of files according to an analysis result of the metadata analysis unit, and a file selection unit that is selected by the file selection unit
- the information processing apparatus includes a file reproduction unit that acquires and reproduces the file.
- Another aspect of the present technology is also metadata that includes information on a plurality of files including encoded data obtained by encoding image data, and controls reproduction of the plurality of files.
- the metadata including information on parameters is analyzed, a file to be played back is selected from the plurality of files according to the analysis result, the selected file is acquired, and played back.
- the metadata includes information on a plurality of files including encoded data obtained by encoding image data, and is metadata that controls reproduction of the plurality of files, and information on encoding parameters of each file Metadata containing is generated.
- the metadata includes information on a plurality of files including encoded data obtained by encoding image data and controls reproduction of the plurality of files, and relates to encoding parameters of each file. Metadata including information is analyzed, a file to be reproduced is selected from a plurality of files according to the analysis result, and the selected file is acquired and reproduced.
- This technology can process information. Further, according to the present technology, it is possible to realize selection of a reproduction file according to the reproduction side capability.
- FIG. 20 is a block diagram illustrating a main configuration example of a computer.
- First embodiment file generation apparatus / file reproduction apparatus
- Second embodiment another configuration example of MPD
- Third embodiment distributed system
- Fourth embodiment (computer)
- the streaming data control software selects an MPD (Media Presentation Description) file of the desired content and acquires it from the Web server.
- MPD Media Presentation Description
- MPD is metadata for managing content such as moving images and audio to be distributed.
- the streaming data control software of the video playback terminal analyzes the MPD and generates data (DASH segment) that matches the quality of the communication line and the performance of the video playback terminal of the desired content.
- the client software for HTTP access acquires the DASH segment from the Web server using HTTP according to the control.
- the moving image reproduction software reproduces the content acquired in this way.
- MPD has a configuration as shown in FIG. 2, for example.
- the client selects an optimum one from the representation attributes included in the period of the MPD (Media Presentation in FIG. 2).
- the client reads the first segment (Segment) of the selected representation (Representation), acquires the initialization segment (Initialization Segment), and processes it. Subsequently, the client acquires and reproduces the subsequent segment (Segment).
- a period (Period), a representation (Representation), and a segment (Segment) in MPD is as shown in FIG. That is, one media content can be managed for each period (Period) that is a data unit in the time direction, and each period (Period) should be managed for each segment (Segment) that is a data unit in the time direction. Can do.
- a plurality of representations (Representations) having different attributes such as bit rate can be configured for each period (Period), a plurality of representations (Representations) having different attributes such as bit rate can be configured.
- this MPD file (also referred to as MPD file) has a hierarchical structure as shown in FIG. 4 below the period. Further, when the MPD structures are arranged on the time axis, an example shown in FIG. 5 is obtained. As is clear from the example of FIG. 5, there are a plurality of representations (Representations) for the same segment (Segment). The client can acquire and reproduce appropriate stream data according to the communication environment, its decoding capability, and the like by adaptively selecting one of these.
- the conventional MPEG-DASH standard does not have a function for notifying the client side of various parameters related to files.
- MPD there is no mechanism for notifying the client side of information indicating a parallel processing type when encoding image data to be distributed. Therefore, there is a possibility that the client selects a file that is not appropriate for its own performance.
- the load of playback processing will increase unnecessarily at the client or the quality of the playback image will unnecessarily decrease.
- Metadata including information on a plurality of files including encoded data obtained by encoding image data, and metadata for controlling reproduction of the plurality of files, including metadata including information on encoding parameters of each file.
- the information regarding the encoding parameter may include information indicating the parallel processing type of the image data encoding.
- the information indicating the parallel processing type may include identification information for identifying whether the parallel processing type is tile division or wavefront parallel processing.
- information regarding the encoding parameters may be set in the MPD representation. Furthermore, information regarding the encoding parameter may be set as the value of the supplemental property.
- FIG. 6 is a diagram illustrating a main configuration example of an MPD generated by applying the present technology.
- two types of bandwidth (bandwidth) of 1 mbps and 3 mbps are prepared, and two types of parallel processing types, tile division (Tile) and wavefront parallel processing (wavefront), are prepared.
- 1 mbps_tile.mp4 is an MP4 file that stores encoded data having a bandwidth of 1 mbps and a parallel processing type of tile division.
- 1 mbps_wavefront.mp4 is an MP4 file that stores encoded data with a bandwidth of 1 mbps and a parallel processing type of wavefront parallel processing.
- 3mbps_tile.mp4 is an MP4 file that stores encoded data having a bandwidth of 3 mbps and a parallel processing type of tile division.
- 3mbps_wavefront.mp4 is an MP4 file that stores encoded data with a bandwidth of 3 mbps and a parallel processing type of wavefront parallel processing.
- an adaptation set (AdaptationSet) is set below the period (Period), four representations are set below that, and a segment is set below each representation.
- 1 mbps_tile.mp4, 1 mbps_wavefront.mp4, 3 mbps_tile.mp4, and 3 mbps_wavefront.mp4 are set (registered) in different segments.
- “hvc1” is identification information indicating that the encoding method is HEVC (High Efficiency Video Coding).
- HEVC High Efficiency Video Coding
- this value is another value.
- SHVC Scalable High Efficiency Video Coding
- the client refers to various information set for such a representation and selects a file to be played.
- the client selects a representation
- the MP4 file registered in the segment belonging to the representation is selected and acquired as a file to be played.
- the information can be presented to the client. Therefore, the client can select a file more suitable for his / her ability based on the presented information. In other words, it is possible to realize selection of a playback file according to the playback side ability.
- the parallel processing type when the parallel processing type is tile division, it is suitable for decoding by a hardware decoder, and when the parallel processing type is wavefront parallel processing, it is suitable for decoding by a software decoder. Therefore, a file more suitable for the client is determined depending on whether its decoder is hardware or software.
- the information set in the representation is arbitrary, and may be information related to encoding such as the parallel processing type shown in the example of FIG. 6, or may be information related to other than encoding. For example, it may be information relating to an encoding target image.
- FIG. 7 is a block diagram illustrating a main configuration example of a file generation apparatus that is an embodiment of an information processing apparatus to which the present technology is applied.
- the file generation apparatus 100 includes a plurality of encoding units that perform encoding using different methods, such as an image encoding unit A, an image encoding unit B, an image encoding unit C, and so on. , Using them, the image is encoded by a plurality of methods, and a plurality of encoded data (encoded data A, encoded data B, encoded data C,. ⁇ ⁇ ) Is generated.
- the image encoding unit 101 supplies the generated encoded data to the MP4 file generation unit 102.
- the MP4 file generation unit 102 converts the supplied plurality of encoded data into MP4 files, and generates a plurality of MP4 files that store different encoded data.
- the MP4 file generation unit 102 outputs a plurality of generated MP4 files (MP4 file A, MP4 file B, MP4 file C,).
- the MP4 file generation unit 102 also supplies the generated plurality of MP4 files (MP4 file A, MP4 file B, MP4 file C,...) To the MPD generation unit 103.
- the MPD generation unit 103 generates an MPD that controls a plurality of supplied MP4 files.
- the MPD generation unit 103 outputs the MPD generated in this way.
- the image encoding unit 101 encodes the image by a plurality of methods in step S101.
- step S102 the MP4 file generation unit 102 converts each of the plurality of encoded data generated in step S101 into an MP4 file.
- the MP4 file generation unit 102 When a plurality of MP4 files storing different encoded data are generated, the MP4 file generation unit 102 outputs the generated MP4 file in step S103.
- step S104 the MPD generation unit 103 acquires the image / encoding information of the encoded data included in the MP4 file from each MP4 file generated in step S102.
- step S105 the MPD generation unit 103 generates an MPD including information of all the MP4 files using the image / encoding information of each encoded data.
- step S106 the MPD generation unit 103 outputs the MPD generated in step S105.
- step S106 ends, the file generation process ends.
- the MPD generation unit 103 sets an adaptation set in step S121.
- step S122 the MPD generation unit 103 sets a representation for each MP4 file.
- step S123 the MPD generation unit 103 sets an MP4 file for each segment.
- the MPD generation unit 103 sets the image / encoding information of the MP4 file for each representation.
- image / encoding information information (codecs) indicating the encoding method of encoded data stored in the MP4 file, the bandwidth of the MP4 file, and the supplemental property (SupplementalProperty) ) Is set.
- codecs information indicating the encoding method of encoded data stored in the MP4 file, the bandwidth of the MP4 file, and the supplemental property (SupplementalProperty)
- the content of the image / encoded information is arbitrary, and the image / encoded information may include other information.
- step S124 When the process of step S124 is completed, the MPD generation process is terminated, and the process returns to FIG.
- the file generating apparatus 100 can set parameters relating to an image and encoding to a representation and present them to the playback side. Therefore, the file generation device 100 can enable the playback side to select a file that is more suitable for its own ability based on the presented information. In other words, it is possible to realize selection of a playback file according to the playback side ability.
- FIG. 10 is a block diagram illustrating a main configuration example of a file reproduction device which is an embodiment of an information processing device to which the present technology is applied.
- a file playback apparatus 200 is an apparatus that generates and outputs a decoded image by playing back the MP4 file and MPD generated as described above by the file generation apparatus 100 of FIG.
- the file playback apparatus 200 includes an MPD analysis unit 201, an MP4 file selection unit 202, an MP4 file playback unit 203, and an image decoding unit 204.
- the file playback apparatus 200 in FIG. 10 analyzes the input MPD by executing a file playback process, and selects and obtains an MP4 file that stores encoded data more suitable for its own ability based on the information. Then, the MP4 file is reproduced to generate a decoded image.
- An example of the flow of this file reproduction process will be described with reference to the flowchart of FIG.
- the MPD analysis unit 201 acquires the MPD in step S201.
- step S202 the MPD analysis unit 201 extracts the image / encoding information of each MP4 file from the MPD acquired in step S201, and supplies it to the MP4 file selection unit 202.
- step S203 the MP4 file selection unit 202 selects, as an MP4 file to be reproduced, an MP4 file more suitable for its own ability based on the supplied image / encoding information.
- step S204 the MP4 file selection unit 202 requests the MP4 file selected by the process in step S203 from the storage destination.
- step S205 the MP4 file reproduction unit 203 acquires the MP4 file supplied in response to the request in step S204.
- step S206 the MP4 file reproduction unit 203 reproduces the MP4 file acquired in step S205, extracts encoded data, and supplies the encoded data to the image decoding unit 204.
- step S207 the image decoding unit 204 decodes the encoded data supplied in step S206 to generate decoded image data.
- step S208 the image decoding unit 204 outputs the decoded image data generated in step S207.
- the file playback apparatus 200 can more easily grasp the characteristics of the encoded data by referring to the image and encoding parameters set in the MPD representation. can do. Therefore, the file playback apparatus 200 can select a file that is more suitable for its own ability based on the presented information. In other words, it is possible to realize selection of a playback file according to the playback side ability.
- the information indicating the parallel processing type may include identification information for identifying whether the parallel processing type is slice division, tile division, or wavefront parallel processing.
- the information on the encoding parameter may include information indicating the maximum size that can be taken by the segmentation.
- FIG. 12 is a diagram illustrating another configuration example of the MPD generated by applying the present technology.
- the configuration example shown in FIG. 12 is basically the same as the example described with reference to FIG. 6, but the value of the supplemental property value is different. For example, it is set as follows.
- min_spatial_segmentation_idc indicating the maximum size that segmentation can take
- identification information indicating the parallel processing type of the MP4 file are set as the value (value).
- the min_spatial_segmentation_idc and the parallelism type are parameters defined in, for example, VUI (Video Usability Information) of encoded data (HEVC).
- FIG. 13 shows an example of the syntax of the HEVC decoder configuration record (HEVC DecoderConfigurationRecord) generated in this VUI.
- min_spatial_segmentation_idc and parallelism_Type are set in the HEVC decoder configuration record.
- An example of parallelism parallelType semantics is shown in FIG. For example, when the value of parallelism Type is “1”, the parallel processing type is slice division, and when the value is “2”, the parallel processing type is tile division, and the value is “3”. Indicates that the parallel processing type is wavefront parallel processing.
- the MPD generation unit 103 extracts the image / encoded information included in the encoded data, and sets various information in the MPD representation without changing the value. That is, the existing parameters are presented to the playback side. Therefore, the MPD generation unit 103 does not need to define a new parameter, and can more easily present image / encoded information to the reproduction side. Therefore, the client can select a file more suitable for his / her ability based on the presented information. In other words, it is possible to realize selection of a playback file according to the playback side ability.
- the various processes such as the file generation process and the file reproduction process are basically the same as those in the above-described example, and thus the description thereof is omitted.
- the information set for the MPD representation is arbitrary.
- it may be picture type alignment (constraint) information (Pic_type / IRAP align) between layers, bit rate or frame rate information (Bit_rate / pic_rate), color primary, transfer Information (video_signal) related to image data such as Characteristic and Matrix coefficients may be used, adaptive resolution control (Adaptive Resolution ⁇ ⁇ Control), or various flag information such as higher_layer_irap_skip_flag and vert_pahse_position_in_use_flag.
- HRD-related information such as bistream partition.
- information other than these may be used.
- the file playback apparatus 200 has been described so as to realize selection of a playback file according to the playback-side capability from among a plurality of MP4 files. It may be the ability of processing until generation of, or other ability.
- the MP4 file selection unit 202 may select an MP4 file that is more appropriate for the performance (for example, resolution, color gamut, frame rate, etc.) of the display that displays the obtained decoded image.
- the display may be a device different from the file playback device 200.
- FIG. 15 is a diagram illustrating a main configuration example of a distribution system to which the present technology is applied.
- a distribution system 300 shown in FIG. 15 is a system for distributing still images and moving images. As illustrated in FIG. 15, the distribution system 300 includes a distribution data generation device 301, a distribution server 302, a network 303, a terminal device 304, and a terminal device 305.
- the distribution data generation device 301 generates distribution data in a distribution format from still image or moving image data to be distributed.
- the distribution data generation device 301 supplies the generated distribution data to the distribution server 302.
- the distribution server 302 stores and manages the distribution data generated by the distribution data generation device 301 in a storage unit or the like, and provides the distribution data distribution service to the terminal device 304 or the terminal device 305 via the network 303. To do.
- the network 303 is a communication network serving as a communication medium.
- the network 303 may be any communication network, a wired communication network, a wireless communication network, or both of them.
- it may be a wired LAN (Local Area Network), a wireless LAN, a public telephone line network, a wide area communication network for a wireless mobile body such as a so-called 3G line or 4G line, or the Internet, or a combination thereof. May be.
- the network 303 may be a single communication network or a plurality of communication networks.
- the network 303 is partially or entirely configured by a communication cable of a predetermined standard such as a USB (Universal Serial Bus) cable, an HDMI (registered trademark) (High-Definition Multimedia Interface) cable, or the like. You may be made to do.
- a communication cable of a predetermined standard such as a USB (Universal Serial Bus) cable, an HDMI (registered trademark) (High-Definition Multimedia Interface) cable, or the like. You may be made to do.
- the distribution server 302, the terminal device 304, and the terminal device 305 are connected to the network 303 and are communicable with each other.
- the connection method to these networks 303 is arbitrary.
- these devices may be connected to the network 303 by wired communication or may be connected by wireless communication. Further, for example, these devices may be connected to the network 303 via an arbitrary communication device (communication equipment) such as an access point, a relay device, or a base station.
- the terminal device 304 and the terminal device 305 are each an arbitrary electronic device having a communication function, such as a mobile phone, a smartphone, a tablet computer, and a notebook computer.
- the terminal device 304 or the terminal device 305 requests the distribution server 302 to distribute the distribution file based on an instruction from a user or the like.
- the distribution server 302 transmits the requested distribution data to the request source.
- the terminal device 304 or the terminal device 305 that has requested the distribution receives and reproduces the distribution data.
- the present technology described above in each embodiment is applied as the distribution data generation device 301. That is, the above-described file generation device 100 is used as the distribution data generation device 301.
- the present technology described above in each embodiment is applied as the terminal device 304 or the terminal device 305. That is, the above-described file reproduction device 200 is used as the terminal device 304 or the terminal device 305.
- the distribution data generation device 301, the terminal device 304, and the terminal device 305 can obtain the same effects as those of the above-described embodiments. That is, the distribution system 300 can realize selection of a reproduction file according to the reproduction side capability.
- FIG. 16 is a block diagram showing an example of the hardware configuration of a computer that executes the above-described series of processing by a program.
- a CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- An input / output interface 410 is also connected to the bus 404.
- An input unit 411, an output unit 412, a storage unit 413, a communication unit 414, and a drive 415 are connected to the input / output interface 410.
- the input unit 411 includes, for example, a keyboard, a mouse, a microphone, a touch panel, an input terminal, and the like.
- the output unit 412 includes, for example, a display, a speaker, an output terminal, and the like.
- the storage unit 413 includes, for example, a hard disk, a RAM disk, a nonvolatile memory, and the like.
- the communication unit 414 is composed of a network interface, for example.
- the drive 415 drives a removable medium 421 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
- the CPU 401 loads, for example, a program stored in the storage unit 413 to the RAM 403 via the input / output interface 410 and the bus 404 and executes the program, and the series described above. Is performed.
- the RAM 403 also appropriately stores data necessary for the CPU 401 to execute various processes.
- the program executed by the computer (CPU 401) can be recorded and applied to, for example, a removable medium 421 as a package medium or the like.
- the program can be installed in the storage unit 413 via the input / output interface 410 by attaching the removable medium 421 to the drive 415.
- This program can also be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting. In that case, the program can be received by the communication unit 414 and installed in the storage unit 413.
- a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
- the program can be received by the communication unit 414 and installed in the storage unit 413.
- this program can be installed in the ROM 402 or the storage unit 413 in advance.
- the program executed by the computer may be a program that is processed in time series in the order described in this specification, or in parallel or at a necessary timing such as when a call is made. It may be a program for processing.
- the step of describing the program recorded on the recording medium is not limited to the processing performed in chronological order according to the described order, but may be performed in parallel or It also includes processes that are executed individually.
- each step described above can be executed in each device described above or any device other than each device described above.
- the device that executes the process may have the functions (functional blocks and the like) necessary for executing the process described above.
- Information necessary for processing may be transmitted to the apparatus as appropriate.
- the system means a set of a plurality of components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Accordingly, a plurality of devices housed in separate housings and connected via a network and a single device housing a plurality of modules in one housing are all systems. .
- the configuration described as one device (or processing unit) may be divided and configured as a plurality of devices (or processing units).
- the configurations described above as a plurality of devices (or processing units) may be combined into a single device (or processing unit).
- a configuration other than that described above may be added to the configuration of each device (or each processing unit).
- a part of the configuration of a certain device (or processing unit) may be included in the configuration of another device (or other processing unit). .
- the present technology can take a configuration of cloud computing in which one function is shared by a plurality of devices via a network and is jointly processed.
- each step described in the above flowchart can be executed by one device or can be shared by a plurality of devices.
- the plurality of processes included in the one step can be executed by being shared by a plurality of apparatuses in addition to being executed by one apparatus.
- the present technology is not limited to this, and any configuration mounted on such a device or a device constituting the system, for example, a processor as a system LSI (Large Scale Integration), a module using a plurality of processors, a plurality of It is also possible to implement as a unit using other modules, a set obtained by further adding other functions to the unit (that is, a partial configuration of the apparatus), and the like.
- a processor as a system LSI (Large Scale Integration)
- a module using a plurality of processors a plurality of It is also possible to implement as a unit using other modules, a set obtained by further adding other functions to the unit (that is, a partial configuration of the apparatus), and the like.
- this technique can also take the following structures.
- the metadata including information on a plurality of files including encoded data obtained by encoding image data, and controlling the reproduction of the plurality of files, the information including information on encoding parameters of each file
- An information processing apparatus including a metadata generation unit that generates data.
- the information regarding the encoding parameter includes information indicating a parallel processing type of encoding of the image data.
- the information indicating the parallel processing type includes identification information that identifies whether the parallel processing type is tile division or wavefront parallel processing.
- the information indicating the parallel processing type includes identification information for identifying whether the parallel processing type is slice partitioning, tile partitioning, or wavefront parallel processing.
- the information processing apparatus described in 1. The information processing apparatus according to any one of (1) to (4), wherein the information related to the encoding parameter includes information indicating a maximum size that can be taken by segmentation. (6) The information processing apparatus according to any one of (1) to (5), wherein the metadata generation unit sets information relating to the encoding parameter in a representation. (7) The information processing apparatus according to (6), wherein the metadata generation unit sets information on the encoding parameter as a value of a supplemental property. (8) The metadata including information on a plurality of files including encoded data obtained by encoding image data and controlling reproduction of the plurality of files, the information including information on encoding parameters of each file An information processing method that generates data.
- the metadata including information on a plurality of files including encoded data obtained by encoding image data, and controlling the reproduction of the plurality of files, the information including information on encoding parameters of each file
- a metadata analysis unit for analyzing data In accordance with the analysis result of the metadata analysis unit, a file selection unit for selecting a file to be reproduced from the plurality of files,
- An information processing apparatus comprising: a file reproduction unit that acquires and reproduces the file selected by the file selection unit.
- the meta data including information on a plurality of files including encoded data obtained by encoding image data, and controlling the reproduction of the plurality of files, the meta data including information on encoding parameters of each file. Analyze the data, According to the analysis result, select a file to play from the plurality of files, An information processing method for acquiring and playing back the selected file.
- 100 file generation device 101 image encoding unit, 102 MP4 file generation unit, 103 MPD generation unit, 200 file playback device, 201 MPD analysis unit, 202 MP4 file selection unit, 203 MP4 file playback unit, 300 distribution system, 301 distribution Data generation device, 302 distribution server, 303 network, 304 and 305 terminal devices, 400 computers
Abstract
Description
1.第1の実施の形態(ファイル生成装置・ファイル再生装置)
2.第2の実施の形態(MPDの他の構成例)
3.第3の実施の形態(配信システム)
4.第4の実施の形態(コンピュータ)
<DASH>
従来、HTTP(HyperText Transfer Protocol)を利用したコンテンツ配信技術として、例えば非特許文献1に記載のように、MPEG-DASH(Moving Picture Experts Group - Dynamic Adaptive Streaming over HTTP)がある。MPEG-DASHでは、同一コンテンツが異なるビットレートで表現された複数の符号化データをコンテンツサーバに格納し、クライアントが、ネットワーク帯域に応じて複数の符号化データのいずれかの符号化データを選択しながら再生するABS(Adaptive Bitrate Streaming)技術が採用されている。
より具体的な例について説明する。図6は、本技術を適用して生成されたMPDの主な構成例を示す図である。この例の場合、バンド幅(bandwidth)が1mbpsと3mbpsとの2種類用意され、さらに、並列処理タイプが、タイル分割(Tile)と、ウェーブフロントパラレルプロセッシング(wavefront)との2種類用意されている。つまり、4つのファイルが用意されている。1mbps_tile.mp4は、バンド幅が1mbpsで並列処理タイプがタイル分割の符号化データを格納するMP4ファイルである。1mbps_wavefront.mp4は、バンド幅が1mbpsで並列処理タイプがウェーブフロントパラレルプロセッシングの符号化データを格納するMP4ファイルである。3mbps_tile.mp4は、バンド幅が3mbpsで並列処理タイプがタイル分割の符号化データを格納するMP4ファイルである。3mbps_wavefront.mp4は、バンド幅が3mbpsで並列処理タイプがウェーブフロントパラレルプロセッシングの符号化データを格納するMP4ファイルである。
または、
<SupplementalProperty schemeIdUri="urm:mpeg:DASH:hevc:vui:2014" value="2">
次に、このようなファイルを生成する装置について説明する。図7は、本技術を適用した情報処理装置の一実施の形態であるファイル生成装置の主な構成例を示すブロック図である。図7において、ファイル生成装置100は、画像符号化部A、画像符号化部B、画像符号化部C、・・・のように、互いに異なる方法で符号化する複数の符号化部を有し、それらを用いて、画像を複数の方法で符号化し、画像または符号化に関するパラメータの少なくとも一部が互いに異なる複数の符号化データ(符号化データA、符号化データB、符号化データC、・・・)を生成する。画像符号化部101は、生成したこれらの符号化データをMP4ファイル生成部102に供給する。
次に、図8のフローチャートを参照して、図7のファイル生成装置100により実行されるファイル生成処理の流れの例を説明する。
次に、図9のフローチャートを参照して、図8のステップS105において実行されるMPD生成処理の詳細な流れの例を説明する。
次に、ファイル生成装置100により生成されたMP4ファイルやMPDを再生する装置について説明する。図10は、本技術を適用した情報処理装置の一実施の形態であるファイル再生装置の主な構成例を示すブロック図である。図10において、ファイル再生装置200は、図7のファイル生成装置100により上述したように生成されたMP4ファイルやMPDを再生して復号画像を生成し、出力する装置である。
図10のファイル再生装置200は、ファイル再生処理を実行することにより、入力されるMPDを解析し、その情報に基づいて自身の能力により適した符号化データを格納するMP4ファイルを選択して取得し、そのMP4ファイルを再生して復号画像を生成する。図11のフローチャートを参照して、このファイル再生処理の流れの例を説明する。
<MPD構成例>
並列処理タイプを示す情報は、並列処理タイプがスライス分割であるか、タイル分割であるか、ウェーブフロントパラレルプロセッシングであるかを識別する識別情報を含むようにしてもよい。
または、
<SupplementalProperty schemeIdUri="urm:mpeg:DASH:hevc:vui:pd:2014" value="4,3">
<配信システム>
各実施の形態において上述した各装置は、例えば、静止画像や動画像を配信する配信システムに利用することができる。以下において、その場合について説明する。
<コンピュータ>
上述した一連の処理は、ハードウエアにより実行させることもできるし、ソフトウエアにより実行させることもできる。一連の処理をソフトウエアにより実行する場合には、そのソフトウエアを構成するプログラムが、コンピュータにインストールされる。ここでコンピュータには、専用のハードウエアに組み込まれているコンピュータや、各種のプログラムをインストールすることで、各種の機能を実行することが可能な、例えば汎用のパーソナルコンピュータ等が含まれる。
(1) 画像データが符号化された符号化データを含む複数のファイルの情報を含み、前記複数のファイルの再生を制御するメタデータであって、各ファイルの符号化パラメータに関する情報を含む前記メタデータを生成するメタデータ生成部
を備える情報処理装置。
(2) 前記符号化パラメータに関する情報は、前記画像データの符号化の並列処理タイプを示す情報を含む
(1)に記載の情報処理装置。
(3) 前記並列処理タイプを示す情報は、前記並列処理タイプがタイル分割であるか、ウェーブフロントパラレルプロセッシングであるかを識別する識別情報を含む
(2)に記載の情報処理装置。
(4) 前記並列処理タイプを示す情報は、前記並列処理タイプがスライス分割であるか、タイル分割であるか、ウェーブフロントパラレルプロセッシングであるかを識別する識別情報を含む
(2)または(3)に記載の情報処理装置。
(5) 前記符号化パラメータに関する情報は、セグメンテーションの取り得る最大サイズを示す情報を含む
(1)乃至(4)に記載の情報処理装置。
(6) 前記メタデータ生成部は、前記符号化パラメータに関する情報を、リプレゼンテーションに設定する
(1)乃至(5)に記載の情報処理装置。
(7) 前記メタデータ生成部は、前記符号化パラメータに関する情報を、サプリメンタルプロパティのバリューとして設定する
(6)に記載の情報処理装置。
(8) 画像データが符号化された符号化データを含む複数のファイルの情報を含み、前記複数のファイルの再生を制御するメタデータであって、各ファイルの符号化パラメータに関する情報を含む前記メタデータを生成する
情報処理方法。
(9) 画像データが符号化された符号化データを含む複数のファイルの情報を含み、前記複数のファイルの再生を制御するメタデータであって、各ファイルの符号化パラメータに関する情報を含む前記メタデータを解析するメタデータ解析部と、
前記メタデータ解析部の解析結果に従って、前記複数のファイルの中から再生するファイルを選択するファイル選択部と、
前記ファイル選択部により選択された前記ファイルを取得し、再生するファイル再生部と
を備える情報処理装置。
(10) 画像データが符号化された符号化データを含む複数のファイルの情報を含み、前記複数のファイルの再生を制御するメタデータであって、各ファイルの符号化パラメータに関する情報を含む前記メタデータを解析し、
解析結果に従って、前記複数のファイルの中から再生するファイルを選択し、
選択された前記ファイルを取得し、再生する
情報処理方法。
Claims (10)
- 画像データが符号化された符号化データを含む複数のファイルの情報を含み、前記複数のファイルの再生を制御するメタデータであって、各ファイルの符号化パラメータに関する情報を含む前記メタデータを生成するメタデータ生成部
を備える情報処理装置。 - 前記符号化パラメータに関する情報は、前記画像データの符号化の並列処理タイプを示す情報を含む
請求項1に記載の情報処理装置。 - 前記並列処理タイプを示す情報は、前記並列処理タイプがタイル分割であるか、ウェーブフロントパラレルプロセッシングであるかを識別する識別情報を含む
請求項2に記載の情報処理装置。 - 前記並列処理タイプを示す情報は、前記並列処理タイプがスライス分割であるか、タイル分割であるか、ウェーブフロントパラレルプロセッシングであるかを識別する識別情報を含む
請求項2に記載の情報処理装置。 - 前記符号化パラメータに関する情報は、セグメンテーションの取り得る最大サイズを示す情報を含む
請求項1に記載の情報処理装置。 - 前記メタデータ生成部は、前記符号化パラメータに関する情報を、リプレゼンテーションに設定する
請求項1に記載の情報処理装置。 - 前記メタデータ生成部は、前記符号化パラメータに関する情報を、サプリメンタルプロパティのバリューとして設定する
請求項6に記載の情報処理装置。 - 画像データが符号化された符号化データを含む複数のファイルの情報を含み、前記複数のファイルの再生を制御するメタデータであって、各ファイルの符号化パラメータに関する情報を含む前記メタデータを生成する
情報処理方法。 - 画像データが符号化された符号化データを含む複数のファイルの情報を含み、前記複数のファイルの再生を制御するメタデータであって、各ファイルの符号化パラメータに関する情報を含む前記メタデータを解析するメタデータ解析部と、
前記メタデータ解析部の解析結果に従って、前記複数のファイルの中から再生するファイルを選択するファイル選択部と、
前記ファイル選択部により選択された前記ファイルを取得し、再生するファイル再生部と
を備える情報処理装置。 - 画像データが符号化された符号化データを含む複数のファイルの情報を含み、前記複数のファイルの再生を制御するメタデータであって、各ファイルの符号化パラメータに関する情報を含む前記メタデータを解析し、
解析結果に従って、前記複数のファイルの中から再生するファイルを選択し、
選択された前記ファイルを取得し、再生する
情報処理方法。
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EP3148200A4 (en) | 2018-01-03 |
CN106464943B (zh) | 2020-09-11 |
CN106464943A (zh) | 2017-02-22 |
EP3148200B1 (en) | 2020-06-17 |
EP3148200A1 (en) | 2017-03-29 |
US20170127073A1 (en) | 2017-05-04 |
JP6555263B2 (ja) | 2019-08-07 |
JPWO2016002495A1 (ja) | 2017-04-27 |
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