WO2019054201A1 - Dispositif et procédé de traitement d'informations - Google Patents

Dispositif et procédé de traitement d'informations Download PDF

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Publication number
WO2019054201A1
WO2019054201A1 PCT/JP2018/032325 JP2018032325W WO2019054201A1 WO 2019054201 A1 WO2019054201 A1 WO 2019054201A1 JP 2018032325 W JP2018032325 W JP 2018032325W WO 2019054201 A1 WO2019054201 A1 WO 2019054201A1
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WIPO (PCT)
Prior art keywords
streaming data
segment
unit
period
transmission rate
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PCT/JP2018/032325
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English (en)
Japanese (ja)
Inventor
健史 筑波
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ソニー株式会社
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Publication of WO2019054201A1 publication Critical patent/WO2019054201A1/fr

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    • 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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • 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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk

Definitions

  • the present disclosure relates to an information processing apparatus and method, and more particularly to an information processing apparatus and method capable of suppressing occurrence of reproduction delay.
  • HTTP streaming based on HTTP (HyperText Transfer Protocol) as a technology for realizing seamless video delivery service.
  • HTTP HyperText Transfer Protocol
  • MPEG-DASH Mapping Picture Experts Group phase-Dynamic Adaptive Streaming over HTTP
  • DASH Information technology-Dynamic adaptive streaming over HTTP
  • Part 1 Media presentation description and segment formats (MPEG-DASH), ISO / IEC 23009-1
  • Non-Patent Document 1 when the transmission rate of the communication channel is lower than the bit rate of streaming data, the transmission of streaming data may be delayed, and a delay may occur in the reproduction thereof.
  • the present disclosure has been made in view of such a situation, and makes it possible to suppress the occurrence of reproduction delay.
  • the information processing apparatus is a reproduction timing planned in the reproduction schedule of the streaming data based on the information on the quality of the streaming data and the information on the transmission rate of the communication channel to which the streaming data is distributed.
  • Information processing comprising a distribution request unit for requesting distribution of the streaming data based on a reception schedule of the streaming data planned to be received timing of the streaming data so that the streaming data can be received earlier than before It is an apparatus.
  • the information processing method is a reproduction timing planned in the reproduction schedule of the streaming data based on the information on the quality of the streaming data and the information on the transmission rate of the communication channel to which the streaming data is distributed. It is the information processing method which makes a delivery request of the streaming data based on a reception schedule of the streaming data planned to receive the streaming data so that the streaming data can be received earlier than before.
  • An information processing apparatus includes a generation request unit that requests generation of the streaming data such that a bit rate of the streaming data does not exceed a transmission rate of a communication channel to which the streaming data is distributed. It is an information processing apparatus.
  • An information processing method is an information processing method that requests generation of the streaming data such that a bit rate of the streaming data does not exceed a transmission rate of a communication channel to which the streaming data is distributed. .
  • An information processing apparatus generates, based on a request, the streaming data so that the bit rate of the streaming data does not exceed the transmission rate of the communication channel to which the streaming data is distributed. It is an information processing apparatus provided with a unit.
  • An information processing method is, based on a request, information that generates the streaming data such that a bit rate of the streaming data does not exceed a transmission rate of a communication channel to which the streaming data is distributed. It is a processing method.
  • a distribution request for the streaming data is made.
  • generation of streaming data is requested so that the bit rate of the streaming data does not exceed the transmission rate of the communication channel to which the streaming data is distributed.
  • the streaming data is such that the bit rate of the streaming data does not exceed the transmission rate of the communication channel to which the streaming data is distributed. It is generated.
  • information can be processed.
  • the occurrence of reproduction delay can be suppressed.
  • FIG. 3 is a functional block diagram illustrating an example of main functions implemented by the playback device. It is a functional block diagram which shows the example of the main functions which a bit rate determination part implement
  • FIG. 23 is a flowchart illustrating an example of the flow of distribution / reproduction processing, following FIG. It is a timing chart which shows an example of a situation of distribution of streaming data. It is a figure which shows the example of a change of a path
  • FIG. 6 is a functional block diagram illustrating an example of functions implemented by the playback device 102. It is a flowchart explaining the example of the flow of bit rate determination processing. It is a figure for demonstrating the bit rate of a receiving object segment. It is a flow chart explaining an example of a flow of distribution / reproduction processing.
  • FIG. 31 is a flowchart illustrating an example of the flow of distribution / reproduction processing, following FIG. 31; It is a flowchart following FIG. 32 explaining the example of the flow of a delivery and reproduction
  • HTTP streaming As a technology for realizing seamless video delivery service, there is adaptive streaming technology (HTTP streaming) based on HTTP (HyperText Transfer Protocol) protocol.
  • HTTP HyperText Transfer Protocol
  • MPEG-DASH Moving Picture Experts Group phase-Dynamic Adaptive Streaming over HTTP
  • Segment file divided by each (2) Also referred to as a manifest file (MPD (Media Presentaion Description)) in which attributes (bit rate, resolution, fps, etc.) and distribution sources (URL (Uniform Resource Locator), uniform resource locator) of the moving image data group are described ) Prepare in advance.
  • MPD Media Presentaion Description
  • URL Uniform Resource Locator
  • the playback terminal of the client receives and analyzes the MPD, and dynamically changes and receives a segment file of optimum quality in accordance with the reception environment (screen size, network bandwidth, etc.) of the playback terminal of the client.
  • FIG. 1 is a diagram for explaining the outline of such an MPEG-DASH.
  • ⁇ Distribution server side> moving image content generated by imaging with an imaging device 11 or the like is encoded in advance by an encoder 12 (ENC).
  • the encoder 12 generates a plurality of streams having different qualities (resolution and bit rate) of the moving image content by the encoding, aligns the time, and divides each stream into a segment file of several seconds.
  • a bit stream 21 is encoded data of moving image content, which is composed of a plurality of stream groups. Segments of several seconds obtained by dividing each stream of the bit stream 21 are SG101, SG102, SG103,..., SG106.
  • the number of divisions is not limited to the example of FIG. 1 and can be any integer value.
  • the number of qualities included in each segment is not limited to the example of FIG. 1 and can take any integer value.
  • the subscript Rx of the segment file SG101Rx represents a rate Rx indicating a certain quality, and in FIG. 1, the quality improves in the order of R1 ⁇ R2 ⁇ R3, and the amount of data also increases simultaneously.
  • MPD MPD (MPD (MPD)
  • MPD MPD (MPD)
  • encoding information coding method, bit rate, resolution, etc.
  • segment configuration indicating what quality segment file the segment is composed of
  • each Period has information on the start time defined by "start”. Furthermore, each Period has information for each content type of group "Group”. A period "Period” is moving image content of a program unit. Further, in the example of FIG. 2, a group of "video” and a group of "audio” are shown.
  • Each group has an axis of resolution, for example, by “Representation” in which the bit rate (or bandwidth), the horizontal resolution of the picture (or horizontal width of the picture), and the vertical resolution (or vertical height of the picture) of the picture are defined. It is divided into multiple layer streams.
  • Each Representation further includes segment information "SegmentInfo” in which information on a segment “Segment” divided into predetermined time units (duration units) is described in the time direction.
  • segment information SegmentInfo includes "SubSegment” in which information for each subsegment (Sub Segment) is described.
  • the SubSegment describes the access destination URL (Uniform Resource Location) of the corresponding data file and the start time based on the time described in the corresponding Period.
  • the user terminal 32 first receives the MPD 22 from the distribution server 13.
  • the user terminal 32 grasps the contents of the MPD 22, selects and receives a segment file of quality matched to the current communication path condition, the viewing environment, etc., and reproduces it in order.
  • the transmission rate of the communication path from distribution server 13 to user terminal 32 is B in FIG. As shown, assume that it changes with time.
  • the user terminal 32 since the transmission rate is a medium rate R2 from time T3 to T4, the user terminal 32 transmits the bit stream 21 as shown in A and B of FIG. Among the segment files that can be transmitted by R2, select the highest quality segment file (SG103R2), and receive and play it.
  • the user terminal 32 can use the bit stream 21 as shown in A and B of FIG. Among the segment files that can be transmitted at the transmission rate R3, the segment file (SG104R3, SG105R3) of the highest quality is selected, received and reproduced.
  • the transmission rate of the communication path 31 is medium rate R2 at times T6 to T7, as shown in A and B of FIG.
  • the segment file with the highest quality (SG106R2) is selected, received and reproduced.
  • the user terminal 32 can select, receive, and reproduce the moving image content of the quality according to the condition of the communication path 31 (C in FIG. 5).
  • Non-Patent Document 1 when the transmission rate of the communication path 31 is lower than the lower limit bit rate Rmin described in the MPD 22, the user terminal 32 has a delay in receiving and reproducing the target segment (S10xRy). There was a risk of occurrence. Furthermore, there is a risk that the reception and reproduction of the subsequent segment will continue to be delayed. That is, there was a possibility that seamless video reproduction could not be performed.
  • the transmission rate of the communication path 31 fluctuates as shown in B of FIG. Assume.
  • the user terminal 32 can use the bit stream 21 as shown in A and B of FIG. Among the segment files that can be transmitted at the transmission rate R3, the segment file (SG101R3, SG102R3) of the highest quality is selected, received and reproduced.
  • the user terminal 32 since the transmission rate of the communication path 31 is low rate R1, the user terminal 32 transmits the bit stream 21 as shown in A and B of FIG. Among the segment files that can be transmitted at rate R1, the segment file with the highest quality (SG103R1) is selected, received and reproduced.
  • the transmission rate of the communication path 31 is half of the transmission rate R1, that is, R1 / 2.
  • the user terminal 32 has a lower limit rate point described in the MPD 22 because the segment file of the bit stream 21 that can be transmitted at the transmission rate R1 / 2 is not described in the MPD 22. Attempt to receive the segment file SG104R1 corresponding to R1 of.
  • the user terminal 32 when the transmission rate of the communication path 31 is lower than the lower limit bit rate Rmin described in the MPD 22, the user terminal 32 has a delay in receiving and reproducing the target segment (S10xRy), and the subsequent segment There is a risk that the reception and playback of the may continue to be delayed, and there is a risk that seamless video playback may not be possible.
  • FIG. 8 is a block diagram illustrating an exemplary main configuration of a delivery system according to an embodiment of the present technology.
  • a distribution system 100 is a system provided with a streaming distribution service of moving image content.
  • this distribution system 100 has a distribution device 101 and a reproduction device 102.
  • the distribution device 101 and the reproduction device 102 are communicably connected to each other on the network 103.
  • the network 103 is an arbitrary communication network.
  • the communication method employed in the network 103 is arbitrary. For example, wired communication, wireless communication, or both of them may be used.
  • the network 103 may be configured by a single communication network, or may be configured by a plurality of communication networks.
  • the Internet a public telephone network, a wide area communication network for wireless mobiles such as so-called 3G circuits and 4G circuits, WAN (Wide Area Network), LAN (Local Area Network), communication conforming to Bluetooth (registered trademark) standards Communication network for near field communication such as NFC (Near Field Communication), communication channel for infrared communication, standard such as HDMI (High-Definition Multimedia Interface) or USB (Universal Serial Bus)
  • WAN Wide Area Network
  • LAN Local Area Network
  • Bluetooth registered trademark
  • Communication network for near field communication such as NFC (Near Field Communication)
  • communication channel for infrared communication standard such as HDMI (High-Definition Multimedia Interface) or USB (Universal Serial Bus)
  • a communication network or communication path of any communication standard such as a communication network of wired communication conforming to the above may be included in the network 103.
  • the distribution apparatus 101 and the reproduction apparatus 102 can communicate with each other via the network 103 to exchange information.
  • the connection between the distribution apparatus 101 and the reproduction apparatus 102 and the network 103 may be wired (that is, connected via wired communication) or wireless (that is, connected via wireless communication). Or both.
  • the distribution apparatus 101 is an apparatus that performs processing related to distribution of content data.
  • the reproduction device 102 is a device that receives and reproduces content data distributed by the distribution device 101.
  • the delivery system 100 provides a delivery service for content data in basically the same manner as MPEG-DASH.
  • the playback device 102 requests the distribution device 101 for an MPD corresponding to the desired content (arrow 111).
  • the distribution apparatus 101 supplies the MPD to the playback apparatus 102 in response to the request (arrow 112).
  • the playback device 102 requests delivery of a segment of content data necessary for playback based on the MPD (arrow 111).
  • the distribution apparatus 101 distributes the requested content data (streaming data) (arrow 112).
  • the reproduction device 102 reproduces it.
  • the number of devices, the shape and size of the case, the arrangement position, and the like are arbitrary.
  • the MPD 121 includes information such as the bit rate of content data, the resolution of a moving image included in the content data, the segment division unit, and the segment acquisition source.
  • content data exchanged between devices in the distribution system 100 includes moving image data and audio data.
  • FIG. 9 An example of this moving picture data bit stream is shown in FIG.
  • the bit stream 122 shown in B of FIG. 9 is content data distributed in the distribution system 100, and is configured of a plurality of segments (segments SG101 to SG106). Each segment is composed of a plurality of bit streams having different bit rates.
  • the distribution apparatus 101 and the reproduction apparatus 102 of the distribution system 100 perform, for example, distribution, reception, and reproduction as in the example of FIG.
  • FIG. 10 is a timing chart showing the concept of the operation of the delivery system according to the form of Example # 1.
  • a of FIG. 10 illustrates segments that constitute a bit stream 122 having a length of Tperiod for a predetermined time, and a segment file. This timing chart shows how the delivery is performed in response to the rate change as shown in FIG.
  • B of FIG. 10 illustrates the exchange of the distribution request of the segment file in each divided period Di between the distribution device 101 and the reproduction device 102.
  • the reproducing device 102 distributes the distribution request of the segment file SG101 (SG101R2) whose bit rate is R2 and the segment file SG104 (SG104R1) whose bit rate is R1.
  • FIG. 6 illustrates how the data (SG101R2, SG104R1) is supplied from the distribution apparatus 101 and supplied thereto.
  • C of FIG. 10 illustrates a segment file reproduced in each divided period Di in the reproducing apparatus 102.
  • the segment file SG101R2 is reproduced.
  • the predicted transmission rate Rip of the communication channel between the distribution apparatus 101 and the reproduction apparatus 102 in each of the divided periods Di is assumed to be equivalent to B in FIG.
  • a point Li on the map of the reproduction device 102 corresponding to the time Ti is equivalent to A in FIG.
  • the playback device 102 moves from the point L1 to the point L2 from time T1 to T2.
  • the distribution apparatus 101 holds data of a different bit rate for each segment obtained by dividing a reproduction period of streaming data (bit stream 122) into predetermined time units (duration units), and holds an MPD 121 related to the streaming data.
  • the distribution device 101 When the distribution device 101 receives an MPD distribution request for streaming data from the reproduction device 102, the distribution device 101 distributes the MPD to the reproduction device 102.
  • the distribution device 101 when receiving the distribution request of each segment from the reproduction device 102, the distribution device 101 receives specification of a bit rate from among the candidate bit rates Rcand for each segment, and distributes data of the specified bit rate.
  • FIG. 11 is a block diagram illustrating an exemplary main configuration of the distribution apparatus 101 according to an embodiment of the information processing apparatus to which the present technology is applied.
  • the distribution apparatus 101 includes a CPU 201, a ROM 202, a RAM 203, a bus 204, an input / output interface 210, an input unit 211, an output unit 212, a storage unit 213, a communication unit 214, and a drive 215.
  • the CPU 201, the ROM 202 and the RAM 203 are mutually connected via a bus 204. Also connected to the bus 204 is an input / output interface 210. An input unit 211, an output unit 212, a storage unit 213, a communication unit 214, and a drive 215 are connected to the input / output interface 210.
  • the input unit 211 is an arbitrary input device that receives external information such as user input.
  • the input unit 211 may include one or more of an operation button, a touch panel, a camera, a microphone, and an input terminal.
  • the input unit 211 may include one or more arbitrary sensors such as an optical sensor and a temperature sensor.
  • the input unit 211 may have other input devices.
  • the output unit 212 is an arbitrary output device that outputs information such as an image and a sound.
  • the output unit 212 may include any one or more of a display, a speaker, and an output terminal.
  • the output unit 212 may have output devices other than these.
  • the storage unit 213 is formed of an arbitrary storage medium that stores information such as a program and data.
  • the storage unit 213 may include any one or more of a hard disk, a RAM disk, and a non-volatile memory.
  • the storage unit 213 may have storage media other than these.
  • the communication unit 214 includes an arbitrary communication device that performs communication for exchanging information such as programs and data with an external device via a predetermined communication medium (for example, an arbitrary network such as the Internet).
  • the communication unit 214 may be configured by, for example, any network interface.
  • the communication unit 214 communicates (transfers programs and data) with an apparatus outside the distribution apparatus 101.
  • the communication unit 214 may have a wired communication function, a wireless communication function, or both.
  • the drive 215 reads the information stored in the removable medium 221 attached to itself, and writes the information in the removable medium 221 attached to itself.
  • the drive 215 can read information from the removable medium 221 and supply the read information to the CPU 201, the RAM 203, and the like.
  • the drive 215 can store information (a program, data, etc.) supplied from the CPU 201, the RAM 203, etc. in the removable medium 221.
  • the removable medium 221 is a recording medium that can be attached to and detached from the drive 215.
  • a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory may be used.
  • the CPU 201 performs various processes by, for example, loading a program stored in the storage unit 213 into the RAM 203 via the input / output interface 210 and the bus 204 and executing the program.
  • the RAM 203 also stores data necessary for the CPU 201 to execute various processes.
  • the CPU 201 can perform processing relating to detection of corresponding points by executing the program or the like as described above.
  • FIG. 12 is a functional block diagram showing an example of functions implemented by the delivery apparatus 101 executing a program or the like. As illustrated in FIG. 12, by executing the program, for example, the distribution apparatus 101 can execute the MPD management unit 251, the MPD request reception unit 252, the MPD transmission unit 253, the content management unit 254, the content request reception unit 255, and the content.
  • a transmission unit 256 is provided.
  • illustration of the arrow etc. is abbreviate
  • the MPD management unit 251 performs processing regarding management of the MPD. For example, the MPD management unit 251 reads and writes the MPD stored in the storage unit 213 or the like.
  • the MPD request accepting unit 252 performs processing regarding acceptance of the MPD transmission request. For example, the MPD request receiving unit 252 controls the communication unit 214 to receive a request transmitted from the playback device 102 or the like.
  • the MPD transmission unit 253 performs processing regarding transmission of MPD. For example, the MPD transmission unit 253 controls the communication unit 214 to transmit the MPD read by the MPD management unit 251 to the request source based on the request accepted by the MPD request acceptance unit 252.
  • the content management unit 254 performs processing regarding management of content data. For example, the content management unit 254 reads and writes content data (such as the bit stream 122) stored in the storage unit 213 or the like.
  • the content request receiving unit 255 performs processing relating to receiving a transmission request for content data. For example, the content request receiving unit 255 controls the communication unit 214 to receive a request transmitted from the playback device 102 or the like.
  • the content transmission unit 256 performs processing related to transmission of content data. For example, the content transmission unit 256 controls the communication unit 214 to transmit the content data read by the content management unit 254 to the request source based on the request accepted by the content request acceptance unit 255.
  • FIG. 13 is a block diagram illustrating an exemplary main configuration of a playback device 102 according to an embodiment of the information processing device to which the present technology is applied.
  • the playback device 102 includes a CPU 301, a ROM 302, a RAM 303, a bus 304, an input / output interface 310, an input unit 311, an output unit 312, a storage unit 313, a communication unit 314, and a drive 315.
  • the CPU 301, the ROM 302, and the RAM 303 are mutually connected via a bus 304. Also connected to the bus 304 is an input / output interface 310. An input unit 311, an output unit 312, a storage unit 313, a communication unit 314, and a drive 315 are connected to the input / output interface 310.
  • the input unit 311 is an arbitrary input device that receives external information such as user input.
  • the input unit 311 may include any one or more of an operation button, a touch panel, a camera, a microphone, and an input terminal.
  • the input unit 311 may include one or more arbitrary sensors such as an optical sensor and a temperature sensor.
  • the input unit 311 may have other input devices.
  • the output unit 312 is an arbitrary output device that outputs information such as an image and a sound.
  • the output unit 312 may include any one or more of a display, a speaker, and an output terminal.
  • the output unit 312 may have output devices other than these.
  • the storage unit 313 is an arbitrary storage medium that stores information such as a program and data.
  • the storage unit 313 may include one or more of a hard disk, a RAM disk, and a non-volatile memory.
  • the storage unit 313 may have storage media other than these.
  • the communication unit 314 includes an arbitrary communication device that performs communication for exchanging information such as programs and data with an external device via a predetermined communication medium (for example, an arbitrary network such as the Internet).
  • the communication unit 314 may be configured by, for example, any network interface.
  • the communication unit 314 performs communication (transfer of program and data) with an external device of the playback device 102.
  • the communication unit 314 may have a wired communication function, a wireless communication function, or both.
  • the drive 315 reads information stored in the removable media 321 attached to itself, and writes information in the removable media 321 attached to itself.
  • the drive 315 can read information from the removable medium 321 and supply the read information to the CPU 301, the RAM 303, and the like.
  • the drive 315 can store information (a program, data, etc.) supplied from the CPU 301, the RAM 303, etc. in the removable medium 321.
  • the removable medium 321 is a recording medium that is removable from the drive 315.
  • a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory may be used.
  • the CPU 301 performs various processes by, for example, loading a program stored in the storage unit 313 into the RAM 303 via the input / output interface 310 and the bus 304 and executing the program.
  • the RAM 303 also stores data necessary for the CPU 301 to execute various processes.
  • the CPU 301 can perform processing relating to detection of corresponding points by executing the program or the like as described above.
  • FIG. 14 is a functional block diagram showing an example of functions implemented by the playback device 102 executing a program or the like. As shown in FIG. 12, by executing the program, for example, the playback device 102 performs the MPD request unit 351, the MPD acquisition unit 352, the MPD holding unit 353, the distribution request unit 354, the bit rate determination unit 355, and the prediction transmission. A rate acquisition unit 356 is provided. In addition, although illustration of the arrow etc. is abbreviate
  • the MPD request unit 351 performs processing relating to the MPD request.
  • the MPD request unit 351 controls the communication unit 314 to transmit an MPD transmission request to the distribution apparatus 101.
  • the MPD acquisition unit 352 performs a process related to acquisition of the MPD.
  • the MPD acquisition unit 352 controls the communication unit 314, and acquires the MPD transmitted from the distribution apparatus 101 in response to the request from the MPD request unit 351.
  • the MPD holding unit 353 performs processing regarding holding of the MPD.
  • the MPD holding unit 353 stores and holds the MPD acquired by the MPD acquisition unit 352 in the storage unit 313, the RAM 302, and the like.
  • the distribution request unit 354 performs a process related to a distribution request for content data. For example, the distribution request unit 354 controls the communication unit 314 to transmit a distribution data distribution request to the distribution apparatus 101. Further, the distribution request unit 354 acquires the content data distributed in response to the request. Furthermore, the distribution request unit 354 reproduces the acquired content data.
  • the bit rate determination unit 355 performs processing regarding setting of the bit rate of content data. For example, the bit rate determination unit 355 sets a bit rate (for each segment) of content data to be received and reproduced. For example, the bit rate determination unit 355 refers to the received MPD and the predicted transmission rate Rip for each of the divided periods, and sets 0 or more segments to be received in each divided period Di, and the received bit rate of each segment ( Determine the reception schedule).
  • the predicted transmission rate acquisition unit 356 performs processing regarding prediction of the transmission rate of the communication channel. For example, the predicted transmission rate acquisition unit 356 acquires a predicted transmission rate Rip for each divided period of the communication path from the distribution device 101 to the reproduction device 102.
  • the playback device 102 plays back the playback target segment in each divided period. The details of each component block will be described below.
  • Predicted transmission rate acquisition unit 356 Based on the movement path information (prediction information) of the playback device 102 (for example, A in FIG. 6), the predicted transmission rate acquisition unit 356 sets the transmission rate of the communication channel between the delivery device 101 to the playback device 102 for each divided period Di A predicted value (also referred to as a predicted transmission rate Rip) (for example, B of FIG. 6) is acquired.
  • a predicted transmission rate Rip also referred to as a predicted transmission rate Rip
  • the predicted transmission rate Rip is acquired, for example, with reference to a database (channel predicted transmission rate DB) in which the movement path information and the transmission rate are associated with each other.
  • the predicted transmission rate Rip of each divided period Di is as follows.
  • Predicted transmission rate R3p R1 of divided period D3 ⁇
  • R4 p R1 / 2 ⁇
  • R5p R1 / 2 of division period D5 ⁇
  • Predicted transmission rate of divided period D6 R6 p R1
  • the information on the transmission rate includes the predicted transmission rate which is the transmission rate of the communication channel predicted based on the movement path of the information processing apparatus, and the reception schedule is set based on the predicted transmission rate. It is also good.
  • bit rate determination unit 355 The function of the bit rate determination unit 355 is as follows. Determine the segment Si to be regenerated in each divided period Di with reference to the MPD (regeneration schedule). The segment Si reproduced in each segment period Di with reference to the bit rate information for each segment and the predicted transmission rate Rip for each segment period Di is the segment period Di or a segment period Dj before the segment period Di Determine a reception schedule for requesting distribution at i> j).
  • the information on quality includes the bit rate of the streaming data obtained by analyzing the MPD, and the bit rate determination unit 355 sets the reception schedule based on the bit rate.
  • bit rate determination unit 355 plans a period for receiving each segment of streaming data so that each segment of streaming data can be received in a period before the period planned in the reproduction schedule, Set the reception schedule.
  • the bit rate determination unit 355 determines the segment SG10x to be reproduced in each divided period Di within the predetermined time Tperiod with reference to the MPD 121.
  • the bit rate determination unit 355 receives 0 or more segments received in each division period Di from the predicted transmission rate Rip of each division period Di in the predetermined time Tperiod and the bit rate information of each segment SG10x described in the MPD 121.
  • the distribution request section 354 is supplied with data (referred to as a reception schedule table) in which the allocation of the reception target segment for each determined division period Di and the bit rate of each reception target segment are described.
  • S (i, j) represents the j-th reception target segment in the division period Di
  • the bit rate of S (i, j) is denoted as R (i, j).
  • the bit rate determination unit 355 has a reproduction target segment determination unit 371, a receivable segment number derivation unit 372, a reception target segment determination unit 373 and a reception target segment bit rate determination unit 374.
  • the reproduction target segment determination unit 371 determines a segment to be reproduced in each divided period Di with reference to the MPD 121. For example, as shown in the table shown in FIG. 16, allocation is made to each divided period in order of earlier start time start of each segment based on each period of MPD.
  • the receivable segment number deriving unit 372 determines the receivable number of segments numSG at the lower limit bit rate Rmin based on the predicted transmission rate Rip of each divided period Di, the lower limit bit rate Rmin of the MPD 121, and the maximum reception segment number numSGMax.
  • the number numSG) is derived.
  • the receivable segment number deriving unit 372 derives the right end parameter of the table information as illustrated in A of FIG.
  • the receivable segment number deriving unit 372 derives parameters as illustrated in B of FIG.
  • the receivable segment number derivation unit 372 outputs data (receivable segment number information) (table shown in A of FIG. 17) in which the receivable segment number numSG of each divided period Di is described.
  • the reception target segment determination unit 373 refers to the receivable segment number information (A in FIG. 17), and sets zero or more segments S (i, j) to be received in each division period Di based on a predetermined rule. decide. Data (reception target segment allocation information) (table shown in FIG. 18) describing the reception target segment of each of the determined division periods Di is output.
  • the reception target segment bit rate determination unit 374 refers to the reception target segment allocation information (table shown in FIG. 18) to determine the bit rate R (i, j) of the reception target segment S (i, j) in each divided period Di. Is determined based on a predetermined rule.
  • bit rate determination unit 355 The operation of the bit rate determination unit 355 will be described with reference to the flowchart of FIG. First, an example of the flow of the bit rate determination process will be described.
  • step S103 the bit rate determination unit 355 obtains the lower limit bit rate Rmin of the MPD 121 (the third column from the left of A in FIG. 17).
  • numSG clip3 (0, numSGMax, floor (Rip / Rmin)) ... (1)
  • the example which determined the number of receivable segments of each division period Di based on the said Formula (1) is 4th column from the left of A of FIG. That is, the bit rate determination unit 355 can set the reception schedule so as to receive a plurality of segments in a single period within a range not exceeding the transmission rate of the communication path.
  • step S105 the reception target segment determination unit 373 of the bit rate determination unit 355 allocates the segments to be received in each division period Di according to a predetermined rule.
  • a predetermined rule For example, with reference to the table of FIG. 18, a method of assigning segments to be received in each divided period Di based on the first assignment method will be described.
  • the number of divided periods Di is assumed to be the same as the number of segments.
  • the SG 104 is allocated to the division period D1
  • the SG 105 is allocated to the division period D2.
  • one or more segments can be allocated to the division period Di in which the number of receivable segments numSG> 0. ** Up to here (first assignment method) **
  • step S106 the reception target segment bit rate determination unit 374 of the bit rate determination unit 355 determines the bit rate R (i, j) of the reception target segment S (i, j) in each division period Di. Determined by the bit rate allocation method of Here, an example of a predetermined bit rate allocation method will be described.
  • bit rate allocation method # 1 of the reception target segment of the division period Di can be expressed, for example, as follows.
  • bit rate R (i, j) of S (i, j) is simply described as Rj.
  • each reception target segment S (i, j) is set such that the sum of the bit rates R (i, j) of the reception target segment S (i, j) does not exceed the predicted transmission rate Rip.
  • the bit rate R (i, j) of is determined from the candidate bit rate Rcand (equation (2)).
  • the candidate bit rate Rcand is a bit rate described in the MPD.
  • Equation (2) above can also be expressed as a minimization problem, as shown in equation (3) below.
  • FIG. 20 shows an example in which each rate is allocated to the allocation of receivable segments for division period Di shown in FIG. 18 based on the above-mentioned equation (4).
  • the division period D1 will be described as an example. Substituting the parameters in the division period D1 into the above equation (4) yields the inequality shown in the following equation (5).
  • the bit rate R (i, j) of the reception target segment S (i, j) in each divided period Di can be selected from the candidate bit rates Rcand on the MPD and can be determined. ** Up to here (Restriction condition # 1) **
  • constraint condition is arbitrary and is not limited to the above-mentioned constraint condition # 1.
  • constraint condition # 2 may be set.
  • the bit rate R (i, j) of the reception target segment S (i, j) in each divided period Di can be selected from the candidate bit rates Rcand on the MPD 121 and can be determined.
  • the distribution request unit 354 assigns the reception target segments for each division period Di determined by the bit rate determination unit 355, and lists the reception bit rates of the reception target segments (FIGS. Or, referring to the table of FIG. 21) (hereinafter, also referred to as a reception schedule table), the delivery of data corresponding to each split period Di is requested to the delivery apparatus 101 at or before the start time of each split period. .
  • the reception schedule table shown in the tables of FIG. 18 and FIG. 20 (or FIG. 21) has at least the following information. ⁇ Receiving target segment S (i, j) for each divided period Di ⁇ Bit rate R (i, j) of the reception target segment S (i, j)
  • the distribution request unit 354 precedes the reproduction timing planned in the reproduction schedule of the streaming data.
  • the delivery request for the streaming data is made based on the reception schedule of the streaming data planned for the reception timing of the streaming data so that the streaming data can be received. This can suppress the occurrence of reproduction delay.
  • the reproduction timing is planned for each segment of streaming data, and in the reception schedule, each segment of the streaming data can be received before the reproduction timing.
  • the reception timing is planned for each segment, and the distribution request unit makes a distribution request for each segment of streaming data so that each segment of streaming data can be received at the reception timing based on the reception schedule. . Therefore, the occurrence of reproduction delay can be suppressed.
  • each segment of streaming data is received in a period earlier than the period planned in the reproduction schedule.
  • the distribution request unit receives each segment of streaming data in the planned period of the reception schedule based on the reception schedule. To make a distribution request for each segment of streaming data. Therefore, the occurrence of reproduction delay can be suppressed.
  • the distribution request unit 354 performs a process related to a distribution request for content data. For example, the distribution request unit 354 controls the communication unit 314 to transmit a distribution data distribution request to the distribution apparatus 101. Further, the distribution request unit 354 acquires the content data distributed in response to the request. Furthermore, the distribution request unit 354 reproduces the acquired content data.
  • the reproducing apparatus 102 can receive the data of the segment SG 104 in advance in the division period D1, it can reproduce the segment SG 104 to be reproduced in the division period D4 without interruption. That is, the occurrence of the reproduction delay can be suppressed.
  • the reproducing apparatus 102 can receive the data of the segment SG 105 in advance in the division period D2, it can reproduce the segment SG 105 to be reproduced in the division period D5 without interruption. That is, the occurrence of the reproduction delay can be suppressed.
  • the distribution request unit 354 performs the following operation at the start time “T3” of the divided period D3. Designating the bit rate for the first reception target segment “SG103” as “R1” and requesting distribution of the corresponding data “SG103R1”.
  • the distribution request unit 354 performs the following operation at the start time “T6” of the divided period D6. Designating the bit rate for the first reception target segment “SG106” as “R1” and requesting delivery of the corresponding data “SG106R1”.
  • the reproducing device 102 when the predicted transmission rate Rip in a certain divided period Dj is smaller than the lower limit bit rate Rmin of MPD, the reproducing device 102 performs the segment Sj to be reproduced in a certain divided period Dj and the predicted transmission rate Rip is sufficiently large.
  • the pre-reception is performed in a divided period Dj ′ (j ′ ⁇ j) before the divided period Dj.
  • Dj ′ j ′ ⁇ j
  • the playback device 102 receives 0 or more segments Si received in each division period Di from the predicted transmission rate Rip of each division period Di in the predetermined time Tperiod and the bit rate information of each segment Si described in the MPD 121. And the bit rate Ri of the segment Si can be appropriately determined. As a result, the playback device 102 can increase the bit rate of data to be distributed as much as possible to improve playback quality and reduce the possibility of playback interruption.
  • the MPD request unit 351 of the reproduction device 102 controls the communication unit 314 to request the distribution device 101 to distribute the MPD corresponding to the desired streaming data in step S221.
  • step S211 the MPD request reception unit 252 of the distribution apparatus 101 controls the communication unit 214 to receive the MPD distribution request transmitted from the playback apparatus 102.
  • the MPD management unit 251 reads the requested MPD from the storage unit 213 or the like based on the request.
  • step S212 the MPD transmission unit 253 controls the communication unit 214, and transmits the read MPD to the reproduction device 102 that is the request source.
  • step S222 the MPD acquisition unit 352 of the playback device 102 controls the communication unit 314 to receive the MPD transmitted from the distribution device 101.
  • step S223 the predicted transmission rate acquisition unit 356 and the bit rate determination unit 355 of the reproduction device 102 determine the reproduction target segment and the reception target segment of each divided period. That is, the reproduction schedule and the reception schedule are determined.
  • step S224 the distribution request unit 354 of the reproduction device 102 controls the communication unit 314 to receive the target segment for the division period D1 (SG101R2, SG104R1). Request delivery of
  • step S213 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • step S214 the content transmission unit 256 controls the communication unit 214, and transmits the read content data (the reception target segment (SG101R2, SG104R1 in the division period D1)).
  • step S225 the distribution request unit 354 of the playback device 102 controls the communication unit 314 to receive the reception target segments (SG101R2, SG104R1) of the division period D1 transmitted from the distribution device 101.
  • step S226 the distribution request unit 354 of the reproduction device 102 reproduces the reception target segment (SG101R2, SG104R1) of the received divided period D1.
  • the distribution request unit 354 of the reproduction device 102 controls the communication unit 314 as the process of step S227 at the start time T2 of the division period D2 (or before that), and receives the division period D2 from the distribution device 101. Distribution of the target segment (SG102R2, SG105R1) is requested.
  • step S215 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • step S216 the content transmission unit 256 controls the communication unit 214, and transmits the read content data (the reception target segment (SG102R2, SG105R1 in the division period D2)).
  • the process of step S216 ends, the process of the distribution device 101 proceeds to FIG.
  • step S228, the distribution request unit 354 of the playback device 102 controls the communication unit 314, and receives the reception target segments (SG 102R2, SG 105 R1) of the division period D2 transmitted from the distribution device 101.
  • step S229 the distribution request unit 354 of the playback device 102 plays back the reception target segments (SG 102R2, SG 105 R1) in the received divided period D2.
  • the process of the playback device 102 proceeds to FIG.
  • the distribution request unit 354 of the playback device 102 controls the communication unit 314 as the process of step S241 in FIG. 23 at the start time T3 of the division period D3 (or before that), and the distribution period for the distribution device 101 is divided. It requests distribution of the reception target segment (SG103R1) of D3.
  • step S231 of FIG. 23 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • the content transmission unit 256 controls the communication unit 214, and transmits the read content data (the reception target segment (SG103R1) in the division period D3).
  • step S 242 the distribution request unit 354 of the reproduction device 102 controls the communication unit 314 to receive the reception target segment (SG 103 R 1) of the division period D 3 transmitted from the distribution device 101.
  • step S243 the distribution request unit 354 of the reproducing device 102 reproduces the reception target segment (SG103R1) in the received divided period D3.
  • step S244 the distribution request unit 354 of the reproducing device 102 reproduces the reproduction target segment (SG 104R1) in the division period D4.
  • step S245 the distribution request unit 354 of the reproducing device 102 reproduces the reproduction target segment (SG105R1) in the division period D5.
  • the distribution request unit 354 of the playback device 102 controls the communication unit 314 as the process of step S246 at the start time T6 of the division period D6 (or before that), and receives the division period D6 from the distribution device 101. Request delivery of the target segment (SG106R1).
  • step S233 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • the content transmission unit 256 controls the communication unit 214, and transmits the read content data (the reception target segment (SG 106 R1 in the division period D6)).
  • step S247 the distribution request unit 354 of the playback device 102 controls the communication unit 314 to receive the reception target segment (SG 106R1) of the division period D6 transmitted from the distribution device 101.
  • step S248 the distribution request unit 354 of the reproduction device 102 reproduces the reception target segment (SG 106R1) in the received divided period D6.
  • the playback device 102 and the distribution device 101 repeatedly execute the processing corresponding to each of the above-described processing in units of predetermined time Tperiod.
  • the transmission rate of the communication channel is lower than the lower limit bit rate Rmin on the MPD 121 of streaming data in a certain divided period Da. Even in this case, the segment Sa to be reproduced in the division period Da can be previously received in the division period Db before the division period Da.
  • the segment Sa to be reproduced can be reproduced without delay.
  • the reproducing device 102 based on the information on the quality of the streaming data and the information on the transmission rate of the communication channel to which the streaming data is distributed, the reproducing device 102 precedes the reproduction timing planned in the reproduction schedule of the streaming data. Based on a reception schedule of the streaming data planned to receive the streaming data so that the streaming data can be received, a distribution request of the streaming data is made.
  • the playback device 102 can more reliably stream data before playback timing. Can be received. Therefore, the occurrence of reproduction delay can be further suppressed.
  • the audio data SAi of the reproduction target segment Si in the divided period Di may be received in advance in the divided period Dj (j ⁇ i).
  • the moving image data SVi may be received in the division period Di at the expense of image quality (for example, only the IDR picture is received).
  • the timing chart of FIG. 24 corresponds to the timing chart of FIG. 6, and the transmission rate of the communication channel fluctuates as shown by B in FIG.
  • the transmission rate of the communication channel is R / 2.
  • the playback device 102 refers to the bit rate information for each segment and the predicted transmission rate Rip for each division period Di, and divides the audio data SAi of the reproduction target segment Si of each division period Di for the division period Di or A distribution request is made in a divided period Dj (i> j) before the divided period Di.
  • the distribution apparatus 101 distributes the audio data in the divided period Di or in a divided period Dj (i> j) before the divided period Di, as shown in FIG.
  • the audio data SG104AR1 reproduced in the divided period D4 is distributed in the divided period D1
  • the audio data SG105AR1 reproduced in the divided period D5 is distributed in the divided period D2.
  • the reception schedule is set so as to preferentially receive voice data within the range not exceeding the transmission rate of the communication path.
  • the playback apparatus 102 refers to the bit rate information for each segment and the predicted transmission rate Rip for each split period Di, and the IDR picture of the moving image data SVi of the playback target segment Si for this split period D4 and the split period D5. Request to deliver. By doing this, the playback device 102 can play back the audio data and the IDR picture without delay in the division period D4 and the division period D5 in which the transmission rate of the communication channel is reduced.
  • any data having a smaller amount of data than moving image data, such as text data, may be received in advance.
  • the playback device 102 may determine a reception schedule for each of the moving image data and the audio data so that the above distribution request can be made.
  • the reproduction device 102 when the reproduction device 102 requests the distribution device 101 to distribute two or more reception target segments, the distribution device 101 is, as shown in FIG.
  • Each segment to be received (and each data of each segment (moving image, audio)) may be distributed to the playback device 102 through different distribution paths.
  • the reproduction device 102 may instruct the distribution device 101 to perform distribution using a plurality of routes. That is, the playback device 102 may receive a plurality of segments of streaming data transmitted via different paths.
  • the communication path from the distribution apparatus 101 to the playback apparatus 102 includes a path 1 passing through the network 103-1 (a path indicated by an arrow 401 in the figure) and a path 2 passing through the network 103-2. (The route indicated by the arrow 402 in the figure), the route 3 passing through the network 103-3 (the route indicated by the arrow 403 in the figure), ..., N up to the routes via the network 103-N There is a path n of
  • the delay time for sending data from the distribution apparatus 101 to the playback apparatus 102 via the path n is dn (d1 ⁇ d2 ⁇ d3 ⁇ ... ⁇ Dn). For example, if paths a and b (a ⁇ b), path a has a characteristic that data can be sent with less delay time than path b.
  • the distribution apparatus 101 delivers segments in ascending order of playback time via the route n in ascending order of delay time. That is, the segment SG101R2 is distributed via the path 1 (path indicated by the arrow 401), and the segment SG104R1 is distributed via the path 2 (path indicated by the arrow 402).
  • the segment (here, SG101R2) with an earlier reproduction time is reduced to path 1 with a smaller delay time.
  • the route determination method is arbitrary and is not limited to the example of the preceding paragraph.
  • the transmission rate of each path n in the case of sending data from the distribution apparatus 101 to the playback apparatus 102 via the path n is r n (r 1> r 2> r 3>.
  • the route a has a larger size of data that can be distributed per unit time than the route b.
  • the distribution apparatus 101 distributes segments in descending order of bit rate via a route n in descending order of transmission rate. That is, the delivery apparatus 101 delivers the segment SG101R2 via the route 1 (the route indicated by the arrow 401), and delivers the segment SG104R1 via the route 2 (the route indicated by the arrow 402).
  • the distribution apparatus 101 distributes a segment having a larger bit rate (here, SG101R2) when distributing two or more (ie, a plurality of) reception target segments in a certain division period Dj. It can be transmitted via the route 1 with a higher transmission rate (a route via the network 103-1). That is, it is possible to reduce the time required for transmission from the distribution device 101 to the reproduction device 102 of a segment having a larger bit rate. That is, the delay time from reception to reproduction of a segment having a larger bit rate can be reduced.
  • SG101R2 a larger bit rate
  • the path may be determined by combining the delay time and the index of the transmission rate.
  • ⁇ Selection of route 3> which path each segment is to be sent to is determined based on the delay time or the transmission rate (or a combination thereof), but is not limited thereto.
  • the delivery route may be determined by the type of segment data to be delivered.
  • the path a can deliver data at a smaller packet loss rate than the path b.
  • the distribution apparatus 101 distributes audio data via the route n in ascending order of the packet loss rate in order of reproduction time. That is, audio data SG101AR1 of segment SG101 is distributed via path 1 (path indicated by arrow 401), and audio data SG104AR1 of segment SG104 is distributed via path 2 (path indicated by arrow 402). Furthermore, the distribution apparatus 101 distributes the moving image data via the route n in the order of decreasing packet loss rate, in the order of earlier reproduction time. Then, the moving image data SG101VR2 of the segment SG101 is distributed via the path 3.
  • voice data is sent via a path with a lower packet loss rate in order of reproduction time.
  • the path may be determined by combining the above-described indicators of delay time, transmission rate, and packet loss rate.
  • the characteristics (transmission rate, delay time, error rate) of the path n (1... N) are different characteristics (transmission rate, delay time, error rate) using, for example, a technology called network slicing that can be used in 5G. ) May be defined.
  • Second embodiment> ⁇ Required Bit Rate Segment & MPD Creation Request>
  • the reproducing device 102 when the predicted transmission rate Rip of a certain divided period Dj is smaller than the lower limit bit rate Rmin of MPD, the reproducing device 102 performs the segment Sj to be reproduced in the divided period Dj and the predicted transmission rate Rip In the division period Dj ′ (j ′ ⁇ j) prior to the sufficiently large division period Dj, the pre-reception from the distribution apparatus 101 is performed.
  • the playback device 102 may be able to request to generate a segment of a distributable rate.
  • FIG. 26 is a timing chart showing an example of distribution in that case.
  • a segment Sj ′ for example, the segment 511 and the segment 512 in FIG. 26
  • Rip> Rmin
  • the distribution device 101 distributes the updated MPD ′ to the playback device 102.
  • the playback device 102 receives the updated MPD 'and refers to it to receive / play back the playback target segment Sj in each divided period Dj.
  • the timing chart of FIG. 26 corresponds to the timing chart of FIG. 6, and the transmission rate of the communication channel fluctuates as shown by B in FIG.
  • the transmission rate of the communication channel is R / 2.
  • FIG. 26A illustrates segments that constitute streaming data having a length of Tperiod for a predetermined time, and segment files (including segment files to be regenerated).
  • B of FIG. 26 illustrates the exchange of the distribution request of the segment file in each divided period Di between the distribution device 101 and the reproduction device 102.
  • the reproducing device 102 requests distribution of the segment file SG101 (SG101R3) having a bit rate of R3 to the distribution device 101, and the corresponding data (SG101R3) from the distribution device 101 Is illustrated.
  • C of FIG. 26 illustrates the segment file reproduced in each divided period Di in the reproducing apparatus 102.
  • the segment file SG101R3 is reproduced.
  • FIG. 27 is a functional block diagram showing an example of functions implemented by the distribution apparatus 101 in this case executing a program or the like. As shown in FIG. 27, by executing the program, the distribution apparatus 101 has the same functions (MPD management unit 251 to content transmission unit 256) as in the case of the first embodiment. Furthermore, the distribution apparatus 101 in this case has a generation request reception unit 551, a segment generation unit 552, and an MPD update unit 553 by executing a program. In addition, although illustration of the arrow etc. is abbreviate
  • the generation request receiving unit 551 receives a request for generating a segment or updating an MPD from the playback device 102.
  • the segment generation unit 552 sets a new lower limit bit rate Rmin ′ smaller than the predicted transmission rate Rip in accordance with the regeneration request of the segment Sj received by the generation request reception unit 551. For example, the bit rate designated by the playback device 102 is set as the new lower limit bit rate Rmin ′.
  • the segment generation unit 552 has a transcoding function, and generates a segment SG10iRj of a new lower limit bit rate Rmin ′ from a bit rate segment of any of the candidate bit rates Rcand already present.
  • the segment generation unit 552 generates the streaming data based on the request so that the bit rate of the streaming data does not exceed the transmission rate of the communication channel to which the streaming data is distributed.
  • the segment generation unit 552 generates the requested segment of the streaming data such that the bit rate of the segment does not exceed the transmission rate of the communication channel. Also, the segment generation unit 552 generates the requested segment of the streaming data such that the bit rate of the segment does not exceed the transmission rate of the communication channel in the period in which the segment is distributed.
  • the segment generation unit 552 supplies the MPD update unit 553 with information such as the generated encode information of the segment SG10iRj and the access destination URL of the segment SG10iRj.
  • the MPD updating unit 553 adds the encoding information of the segment SG10iRj supplied from the segment generating unit 552, the information such as the access destination URL to the MPD of the streaming data, and updates the MPD.
  • the updated MPD (updated MPD) is distributed by the MPD transmission unit 253 to the playback device 102 via the communication unit 214.
  • the content transmission unit 256 sends the segment generated by the segment generation unit 552 to the playback device 102 that is the request source.
  • FIG. 28 is a functional block diagram showing an example of functions implemented by the playback device 102 in this case executing a program or the like. As shown in FIG. 28, by executing the program, the playback device 102 has the same functions (MPD request unit 351 to predicted transmission rate acquisition unit 356) as in the case of the first embodiment. Furthermore, the playback device 102 in this case has a generation request unit 571 by executing a program. In addition, although illustration of the arrow etc. is abbreviate
  • the MPD request unit 351 makes a distribution request of the MPD regarding streaming data to the distribution apparatus 101.
  • the predicted transmission rate acquisition unit 356 acquires a predicted transmission rate Rip for each divided period of the communication path from the distribution device 101 to the reproduction device 102.
  • the bit rate determination unit 355 determines a segment to be received in each division period Di and a reception bit rate (reception schedule) of the segment.
  • the generation request unit 571 refers to the reception schedule, and in the case where the predicted transmission rate Rip of the divided period Dj is smaller than the lower limit bit rate Rmin of MPD, regeneration of the segment Sj satisfying Rip> Rmin and information of the segment Sj The distribution device 101 is requested to generate the added updated MPD ′.
  • the generation request unit 571 requests generation of streaming data so that the bit rate of the streaming data does not exceed the transmission rate of the communication channel to which the streaming data is distributed.
  • the generation request unit 571 requests generation of a segment of a bit rate that does not exceed the transmission rate of the communication channel, for the segment whose bit rate exceeds the transmission rate of the communication channel.
  • the generation request unit 571 requests generation of a bit rate segment not exceeding the transmission rate of the communication channel period for the segment to be delivered during the period when the bit rate of the streaming data exceeds the transmission rate of the communication channel. Do.
  • the generation request unit 571 requests updating of the MPD to reflect the generation of the segment based on the request.
  • the MPD acquisition unit 352 acquires the MPD updated in response to the request.
  • the distribution request unit 354 refers to the reception schedule, designates the bit rate of the reception target segment in each divided period, and requests the distribution apparatus 101 to distribute data of the reception target segment.
  • the distribution request unit 354 receives the reproduction target segment of each divided period, and reproduces the segment.
  • the distribution request unit 354 requests distribution of each segment of streaming data based on the acquired updated MPD.
  • the distribution request unit 354 also receives streaming data distributed in response to the request for each segment. Furthermore, the distribution request unit 354 reproduces each segment of the received streaming data according to the reproduction schedule.
  • the predicted transmission rate acquisition unit 356 basically has the same function as that of the first embodiment.
  • bit rate determination unit 355 in this case basically has the same function as that of the first embodiment. An example of the flow of bit rate determination processing performed by the bit rate determination unit 355 in this case will be described with reference to the flowchart in FIG.
  • step S303 the bit rate determination unit 355 obtains the lower limit bit rate Rmin of the MPD as shown in the third column from the left of the table of FIG.
  • step S304 the bit rate determination unit 355 assigns segments to be received in each division period Di according to a predetermined rule. For example, as shown in the fifth column from the left of the table shown in FIG. 30, the segments are assigned to the divided periods Di in the order of reproduction.
  • the bit rate determination unit 355 sets the reception target segment S (i, 1) of the division period Di to 'F' which does not request regeneration. .
  • the bit rate determination unit 355 sets the reception target segment S (i, 1) of the division period Di to 'T' to request regeneration. .
  • the fourth column from the left of the table shown in FIG. 30 shows an example of the reception bit rate allocated in this way.
  • the bit rate R (i, 1) of the reception target segment S (i, 1) in each divided period Di can be determined from the candidate bit rate Rcand on the MPD and the predicted transmission rate Rip. In addition, it is possible to determine a segment to make a regeneration request.
  • the distribution request unit 354 has basically the same function as that of the first embodiment.
  • the generation request unit 571 performs the following operation at the start time “T1” of the division period D1.
  • the distribution request unit 354 performs the following operation at the start time “T3” of the divided period D3. Designating the bit rate for the first reception target segment “SG103” as “R1” and requesting distribution of the corresponding data “SG103R1”.
  • the distribution request unit 354 performs the following operation at the start time “T4” of the division period D4. Designating the bit rate for the first reception target segment "SG104" as “R1 / 2" to request delivery of the corresponding data "SG104R4".
  • the distribution request unit 354 performs the following operation at the start time “T5” of the division period D5. Designating the bit rate for the first reception target segment "SG105" as “R1 / 2" to request delivery of the corresponding data "SG105R4".
  • the distribution request unit 354 performs the following operation at the start time “T6” of the divided period D6. Designating the bit rate for the first reception target segment “SG106” as “R1” and requesting delivery of the corresponding data “SG106R1”.
  • the playback device 102 determines that the segment Sj to be reproduced in the divided period Dj is the predicted transmission rate Rip of the divided period Dj.
  • the playback device 102 determines that the segment Sj to be reproduced in the divided period Dj is the predicted transmission rate Rip of the divided period Dj.
  • the distribution apparatus 101 is requested.
  • the playback device 102 receives the MPD ′ updated by the distribution device 101, and refers to the updated MPD ′ to perform reception / playback of the playback target segment Sj in each divided period Dj.
  • step S421 the MPD request unit 351 of the reproduction device 102 controls the communication unit 314 to request the distribution device 101 to distribute the MPD corresponding to the desired streaming data. (MPD distribution request)
  • step S411 the MPD request reception unit 252 of the distribution apparatus 101 controls the communication unit 214 to receive the MPD distribution request transmitted from the playback apparatus 102.
  • the MPD management unit 251 reads the requested MPD from the storage unit 213 or the like based on the request.
  • step S412 the MPD transmission unit 253 controls the communication unit 214, and transmits the read MPD to the reproduction device 102 that is the request source.
  • step S422 the MPD acquisition unit 352 of the playback device 102 controls the communication unit 314 to receive the MPD transmitted from the distribution device 101.
  • step S423 the predicted transmission rate acquisition unit 356 and the bit rate determination unit 355 of the playback device 102 determine the playback target segment and the reception target segment of each divided period. That is, the reproduction schedule and the reception schedule are determined.
  • step S413 the generation request receiving unit 551 of the distribution device 101 receives the request.
  • the segment generation unit 552 generates the generation target segments (SG104R4 and SG105R4) based on the request.
  • step S415 the MPD updating unit 553 adds the generated segment information (such as encoding information and access destination URL) to the MPD to generate an updated MPD. That is, this updated MPD corresponds to the above-mentioned reception schedule and reproduction schedule.
  • step S 416 the MPD transmission unit 253 distributes the updated MPD to the playback device 102 via the communication unit 214.
  • step S425 the MPD acquisition unit 352 of the playback device 102 acquires the updated MPD.
  • step S426 the MPD management unit 251 of the playback device 102 analyzes the acquired updated MPD to acquire the access destination URL of the generation target segment.
  • the distribution request unit 354 of the playback device 102 follows the reception schedule (that is, based on the updated MPD) in step S441 of FIG. Control is performed, and distribution of the reception target segment (SG101R3) in the division period D1 is requested to the distribution apparatus 101.
  • step S431 in FIG. 32 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • step S432 the content transmission unit 256 controls the communication unit 214, and transmits the read content data (the reception target segment (SG101R3) of the division period D1).
  • step S 442 the distribution request unit 354 of the playback device 102 controls the communication unit 314 to receive the reception target segment (SG 101 R 3) of the division period D 1 transmitted from the distribution device 101.
  • step S443 the distribution request unit 354 of the reproducing device 102 reproduces the reception target segment (SG101R3) of the received divided period D1 according to the reproduction schedule (that is, based on the updated MPD).
  • step S444 the distribution request unit 354 of the playback device 102 controls the communication unit 314 according to the reception schedule (that is, based on the updated MPD), and the distribution target segment for reception period segment D2 for the distribution device 101 (SG102R3 Request delivery).
  • step S433 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • the content transmission unit 256 controls the communication unit 214, and transmits the read content data (the reception target segment (SG 102R3) of the division period D2).
  • step S445 the distribution request unit 354 of the reproduction device 102 controls the communication unit 314 to receive the reception target segment (SG 102R3) of the division period D2 transmitted from the distribution device 101.
  • step S446 the distribution request unit 354 of the reproduction device 102 reproduces the reception target segment (SG 102R3) of the received divided period D2 according to the reproduction schedule (that is, based on the updated MPD).
  • step S 461 of FIG. 33 the distribution request unit 354 of the playback device 102 controls the communication unit 314 according to the reception schedule (that is, based on the updated MPD). Request delivery of SG103R1).
  • step S451 in FIG. 33 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • the content transmission unit 256 controls the communication unit 214, and transmits the read content data (the reception target segment (SG103R1) in the division period D3).
  • step S 462 the distribution request unit 354 of the playback device 102 controls the communication unit 314 to receive the reception target segment (SG 103 R 1) of the division period D 3 transmitted from the distribution device 101.
  • step S463 the distribution request unit 354 of the reproduction device 102 reproduces the reception target segment (SG103R1) of the received divided period D3 according to the reproduction schedule (that is, based on the updated MPD).
  • step S464 the distribution request unit 354 of the playback device 102 controls the communication unit 314 according to the reception schedule (that is, based on the updated MPD), and the distribution device 101 receives the segment to be received (SG104R4) in the division period D4. Request delivery.
  • step S453 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • the content transmission unit 256 controls the communication unit 214, and transmits the read content data (the reception target segment (SG104R4) in the division period D4).
  • step S465 the distribution request unit 354 of the playback device 102 controls the communication unit 314 to receive the reception target segment (SG 104R4) of the division period D4 transmitted from the distribution device 101.
  • step S466 the distribution request unit 354 of the reproducing device 102 reproduces the reception target segment (SG 104R4) of the received divided period D4 according to the reproduction schedule (that is, based on the updated MPD).
  • step S 481 of FIG. 34 the distribution request unit 354 of the playback device 102 controls the communication unit 314 according to the reception schedule (that is, based on the updated MPD). Request delivery of SG105R5).
  • step S471 of FIG. 34 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • the content transmission unit 256 controls the communication unit 214 to transmit the read content data (the reception target segment (SG 105 R 5 in the division period D 5)).
  • step S 482 the distribution request unit 354 of the playback device 102 controls the communication unit 314 to receive the reception target segment (SG 105 R 5) of the division period D 5 transmitted from the distribution device 101.
  • step S483 the distribution request unit 354 of the reproducing device 102 reproduces the reception target segment (SG105R5) of the received divided period D5 according to the reproduction schedule (that is, based on the updated MPD).
  • step S 484 the distribution request unit 354 of the playback device 102 controls the communication unit 314 according to the reception schedule (that is, based on the updated MPD), and the distribution device 101 receives the segment to be received (SG 106 R 1) in the division period D 6. Request delivery.
  • step S 473 the content request receiving unit 255 of the distribution apparatus 101 controls the communication unit 214 to receive the distribution request.
  • the content management unit 254 reads the data of the requested content from the storage unit 213 or the like based on the distribution request.
  • the content transmission unit 256 controls the communication unit 214, and transmits the read content data (the reception target segment (SG 106 R1 in the division period D6)).
  • step S 485 the distribution request unit 354 of the playback device 102 controls the communication unit 314 to receive the reception target segment (SG 106 R 1) of the division period D 6 transmitted from the distribution device 101.
  • step S 486 the distribution request unit 354 of the reproduction device 102 reproduces the reception target segment (SG 106 R 1) of the received divided period D 6 according to the reproduction schedule (that is, based on the updated MPD).
  • the playback device 102 and the distribution device 101 repeatedly execute the processing corresponding to each of the above-described processing in units of predetermined time Tperiod.
  • the distribution apparatus 101 can regenerate the segment Sa to be reproduced in the division period Da in the division period Db before the division period Da.
  • the reproducing apparatus 102 can receive and reproduce the segment Sa to be reproduced without delay in the divided period Da. As a result, it is possible to reduce the occurrence of delay in reception / reproduction of the segment to be reproduced in the divided period Dc subsequent to the divided period Da, and to realize seamless moving image reproduction. That is, the occurrence of the reproduction delay can be suppressed.
  • the reproducing device 102 predicts the segment Sj to be reproduced in a certain divided period Dj.
  • the division period Dj ′ (j ′ ⁇ j) prior to the division period Dj of which is sufficiently large pre-reception is performed.
  • pre-reception is performed in the division period Dj ′ (j ′ ⁇ j) prior to the division period Dj of which is sufficiently large.
  • the playback device 102 receives in each division period Di from the predicted transmission rate Rip of each division period Di in the predetermined time Tperiod and the bit rate information of each segment Si described in the MPD (M100).
  • the segment Si of and the bit rate Ri of the segment Si can be appropriately determined.
  • the playback device 102 can increase the bit rate of data to be distributed as much as possible to improve playback quality and reduce the possibility of playback interruption. That is, the occurrence of the reproduction delay can be suppressed.
  • the segment Sa to be reproduced in the division period Da is divided It is previously received in advance in the divided period Db before the period Da. Therefore, in the divided period Da, the segment Sa to be reproduced can be reproduced without delay. As a result, it is possible to reduce the occurrence of delay in reception / reproduction of the segment to be reproduced in the divided period Dc subsequent to the divided period Da, and to realize seamless moving image reproduction.
  • the reproduction target is to be reproduced in the division period Da.
  • the distribution device 101 regenerates the segment Sa, which is the segment segment Sa, in the segment period Db before the segment period Da. Therefore, the reproducing apparatus 102 can receive and reproduce the segment Sa to be reproduced without delay in the divided period Da. As a result, it is possible to reduce the occurrence of delay in reception / reproduction of the segment to be reproduced in the divided period Dc subsequent to the divided period Da, and to realize seamless moving image reproduction.
  • the present technology is a system and apparatus used in any field such as traffic, medical care, crime prevention, agriculture, animal husbandry, mining, beauty, factory, home appliance, weather, nature monitoring, etc. as long as it processes images. , Processing unit etc. can be applied.
  • the present technology can be applied to systems and devices provided for viewing. Also, for example, the present technology can be applied to systems and devices provided for traffic management. Furthermore, for example, the present technology can be applied to systems and devices provided for security. Also, for example, the present technology can be applied to systems and devices provided for sports. Furthermore, for example, the present technology can be applied to systems and devices provided for agriculture. Also, for example, the present technology can be applied to systems and devices provided for livestock industry. Furthermore, the present technology can also be applied to systems and devices that monitor natural conditions such as, for example, volcanoes, forests, and oceans.
  • the present technology can be applied to, for example, a meteorological observation system or a meteorological observation apparatus that observes weather, air temperature, humidity, wind speed, daylight hours, and the like.
  • the present technology can be applied to, for example, a system or device for observing the ecology of wildlife such as birds, fish, reptiles, amphibians, mammals, insects, plants and the like.
  • this recording medium is distributed by the removable medium 221 on which the programs, data, etc. are recorded, distributed for distributing programs, data, etc. to the user separately from the apparatus main body.
  • the removable medium 221 for example, by mounting the removable medium 221 in the drive 215, the program, data, etc. stored in the removable medium 221 can be read out and installed in the storage unit 213.
  • this recording medium is distributed for distributing programs, data, etc. to the user separately from the apparatus main body, removable media 321 on which the programs, data, etc. are recorded. It consists of In that case, for example, by mounting the removable medium 321 in the drive 315, the program or data stored in the removable medium 321 can be read and installed in the storage unit 313.
  • the program and data can also be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
  • a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
  • the program, data, and the like can be received by the communication unit 214 and installed in the storage unit 213.
  • the program, data, and the like can be received by the communication unit 314 and installed in the storage unit 313.
  • this program, data, etc. can be installed in advance in a storage unit, a ROM, etc.
  • programs, data, and the like can be installed in advance in the storage unit 213, the ROM 302, and the like.
  • programs, data, and the like can be installed in advance in the storage unit 313, the ROM 302, and the like.
  • the present technology relates to any configuration that configures an apparatus or system, for example, a processor as a system LSI (Large Scale Integration) or the like, a module using a plurality of processors, a unit using a plurality of modules, etc. It can also be implemented as a set or the like with additional functions (ie, part of the configuration of the device).
  • a processor as a system LSI (Large Scale Integration) or the like
  • a module using a plurality of processors a unit using a plurality of modules, etc.
  • additional functions ie, part of the configuration of the device.
  • the system means a set of a plurality of components (apparatus, modules (parts), etc.), and it does not matter whether all the components are in the same case. Therefore, a plurality of devices housed in separate housings and connected via a network and one device housing a plurality of modules in one housing are all systems. .
  • the above-described processing unit may be realized with any configuration as long as it has the function described for the processing unit.
  • the processing unit may be configured by any circuit, an LSI, a system LSI, a processor, a module, a unit, a set, a device, an apparatus, a system, or the like.
  • a plurality of them may be combined.
  • the same type of configuration may be combined as a plurality of circuits, a plurality of processors, or the like, or different types of configurations such as a circuit and an LSI may be combined.
  • the configuration described as one device (or processing unit) may be divided and configured as a plurality of devices (or processing units).
  • the configuration described as a plurality of devices (or processing units) in the above may be collectively configured as one device (or processing unit).
  • configurations other than those described above may be added to the configuration of each device (or each processing unit).
  • part of the configuration of one device (or processing unit) may be included in the configuration of another device (or other processing unit) if the configuration or operation of the entire system is substantially the same. .
  • the present technology can have a cloud computing configuration in which one function is shared and processed by a plurality of devices via a network.
  • the program described above can be executed on any device.
  • the device may have necessary functions (functional blocks and the like) so that necessary information can be obtained.
  • each step described in the above-described flowchart can be executed by one device or in a shared manner by a plurality of devices.
  • the plurality of processes included in one step can be executed by being shared by a plurality of devices in addition to being executed by one device.
  • a plurality of processes included in one step can be executed as a process of a plurality of steps.
  • the processes described as a plurality of steps can be collectively performed as one step.
  • the program executed by the computer may be such that the processing of the steps describing the program is executed in chronological order according to the order described in this specification, in parallel or when a call is made, etc. It may be executed individually at the necessary timing of That is, as long as no contradiction arises, the processing of each step may be performed in an order different from the order described above. Furthermore, the process of the step of writing this program may be executed in parallel with the process of another program, or may be executed in combination with the process of another program.
  • the present technology can also have the following configurations.
  • An information processing apparatus comprising: a distribution request unit that makes a distribution request for the streaming data based on a reception schedule of the streaming data, the reception timing of the streaming data being planned so that it can be received.
  • reproduction timing is planned for each segment of the streaming data
  • reception timing is planned for each segment of the streaming data so that each segment of the streaming data can be received before the reproduction timing
  • the distribution request unit makes the distribution request for each segment of the streaming data so that each segment of the streaming data can be received at the reception timing based on the reception schedule.
  • Information processing equipment In the reproduction schedule, a period for reproducing each segment of the streaming data is planned, In the reception schedule, a period for receiving each segment of the streaming data is planned such that each segment of the streaming data can be received in a period before the period planned for the reproduction schedule.
  • the distribution request unit makes the distribution request for each segment of the streaming data so that each segment of the streaming data can be received in a planned period of the reception schedule based on the reception schedule.
  • the information processing apparatus according to (2). (4) planning a period for receiving each segment of the streaming data so that each segment of the streaming data can be received in a period before the period scheduled in the reproduction schedule;
  • the information processing apparatus according to (3) further including a reception schedule setting unit that sets a schedule.
  • the reception schedule setting unit sets the reception schedule so as to receive a plurality of segments in a single period within a range not exceeding the transmission rate of the communication path. apparatus.
  • the streaming data includes image data and audio data, The information processing apparatus according to (4) or (5), wherein the reception schedule setting unit sets the reception schedule so as to preferentially receive voice data within a range not exceeding the transmission rate of the communication path.
  • the streaming data further includes text data, The information processing apparatus according to (6), wherein the reception schedule setting unit sets the reception schedule so as to preferentially receive text data within a range not exceeding the transmission rate of the communication path.
  • the information related to the transmission rate includes a predicted transmission rate which is a transmission rate of the communication path predicted based on the movement path of the information processing apparatus, The information processing apparatus according to any one of (4) to (7), wherein the reception schedule setting unit sets the reception schedule based on the predicted transmission rate.
  • the information on quality includes the bit rate of the streaming data obtained by analyzing MPD (Media Presentation Description), The information processing apparatus according to any one of (4) to (8), wherein the reception schedule setting unit sets the reception schedule based on the bit rate.
  • An information processing method comprising: requesting distribution of the streaming data based on a reception schedule of the streaming data planned to receive the streaming data so that the streaming data can be received.
  • An information processing apparatus comprising: a generation request unit configured to request generation of the streaming data such that a bit rate of the streaming data does not exceed a transmission rate of a communication channel to which the streaming data is distributed. (22) The generation request unit requests generation of the segment having a bit rate not exceeding the transmission rate of the communication path, for a segment whose bit rate exceeds the transmission rate of the communication path, (21) The information processing apparatus according to claim 1.
  • the generation request unit for a segment of the streaming data delivered in a period in which a bit rate exceeds the transmission rate of the communication channel, a segment of a bit rate not exceeding the transmission rate in the period of the communication path.
  • the information processing apparatus which requests generation of (24)
  • the MPD update request unit according to any one of (21) to (23), further comprising: an MPD update request unit requesting update of MPD (Media Presentation Description) so as to reflect generation of a segment based on a request by the generation request unit.
  • Information processing device (25)
  • the information processing apparatus further including: a distribution request unit that requests distribution of each segment of the streaming data based on the MPD acquired by the MPD acquisition unit.
  • the information processing apparatus further including: a streaming data receiving unit that receives the streaming data distributed according to the request of the distribution request unit for each segment.
  • the information processing apparatus further including: a reproduction unit configured to reproduce each segment of the streaming data received by the streaming data reception unit according to a reproduction schedule.
  • An information processing method comprising: requesting generation of the streaming data such that a bit rate of the streaming data does not exceed a transmission rate of a communication channel to which the streaming data is distributed.
  • An information processing apparatus comprising: a generation unit configured to generate the streaming data based on a request so that a bit rate of the streaming data does not exceed a transmission rate of a communication channel to which the streaming data is distributed. (32) The information processing apparatus according to (31), wherein the generation unit generates the requested segment of the streaming data such that a bit rate of the segment does not exceed a transmission rate of the communication channel. (33) The generation unit generates (32) the requested segment of the streaming data such that the bit rate of the segment does not exceed the transmission rate of the communication channel in a period in which the segment is distributed. Information processor as described. (34) The information processing apparatus according to (33), further including: a distribution unit that distributes the segment of the streaming data generated by the generation unit.
  • the MDP updating unit further updates an MPD (Media Presentation Description) of the streaming data so as to reflect the segment of the streaming data generated by the generation unit.
  • An information processing apparatus (35), further including: an MPD supply unit that supplies the MPD updated by the MPD update unit.
  • Reference Signs List 100 distribution system, 101 distribution apparatus, 102 reproduction apparatus, 103 network, 121 MPD, 122 streaming data, 251 MPD management section, 252 MPD request reception section, 253 MPD transmission section, 254 content management section, 255 content request reception section, 256 Content transmission unit, 351 MPD request unit, 352 MPD acquisition unit, 353 MPD holding unit, 354 distribution request unit, 355 bit rate determination unit, 356 predicted transmission rate acquisition unit, 371 reproduction target segment determination unit, 372 receivable segment number derivation Part, 373 Reception target segment determination unit, 374 Reception target segment bit rate determination unit, 551 Generation request reception unit, 552 Segment generation unit, 553 MPD update unit, 5 1 generation request unit

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

La présente invention concerne un dispositif et un procédé de traitement d'informations qui permettent de supprimer la survenue de retards de reproduction. Une demande de distribution pour des données de diffusion en continu est réalisée sur la base d'un calendrier de réception pour lesdites données de diffusion en continu, dans lequel la synchronisation de réception desdites données de diffusion en continu a été planifiée, sur la base d'informations relatives à la qualité desdites données de diffusion en continu et d'informations relatives au débit de transfert d'un canal de communication sur lequel lesdites données de diffusion en continu seront délivrées, de telle sorte que lesdites données de diffusion en continu peuvent être reçues avant une synchronisation de reproduction qui a été planifiée dans le calendrier de reproduction desdites données de diffusion en continu. La présente invention peut, par exemple, être appliquée à un dispositif de traitement d'informations, un dispositif de traitement d'image, un dispositif de reproduction, un dispositif de distribution, un procédé de traitement d'informations, ou à un programme.
PCT/JP2018/032325 2017-09-15 2018-08-31 Dispositif et procédé de traitement d'informations WO2019054201A1 (fr)

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WO2021200212A1 (fr) * 2020-03-30 2021-10-07 ソニーグループ株式会社 Dispositif de traitement d'informations, procédé de traitement d'informations et programme
WO2021200226A1 (fr) * 2020-03-30 2021-10-07 ソニーグループ株式会社 Dispositif de traitement d'informations, procédé de traitement d'informations et programme

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WO2014171385A1 (fr) * 2013-04-19 2014-10-23 ソニー株式会社 Dispositif serveur, procédé de distribution de contenu et programme informatique
JP2016220012A (ja) * 2015-05-20 2016-12-22 日本電気株式会社 通信端末、データ送受信システム、通信方法、および通信用プログラム
JP2017513264A (ja) * 2014-03-26 2017-05-25 インテル・コーポレーション アダプティブメディアストリーミング

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014171385A1 (fr) * 2013-04-19 2014-10-23 ソニー株式会社 Dispositif serveur, procédé de distribution de contenu et programme informatique
JP2017513264A (ja) * 2014-03-26 2017-05-25 インテル・コーポレーション アダプティブメディアストリーミング
JP2016220012A (ja) * 2015-05-20 2016-12-22 日本電気株式会社 通信端末、データ送受信システム、通信方法、および通信用プログラム

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