WO2010044124A1 - User terminal - Google Patents

User terminal Download PDF

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Publication number
WO2010044124A1
WO2010044124A1 PCT/JP2008/002904 JP2008002904W WO2010044124A1 WO 2010044124 A1 WO2010044124 A1 WO 2010044124A1 JP 2008002904 W JP2008002904 W JP 2008002904W WO 2010044124 A1 WO2010044124 A1 WO 2010044124A1
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WO
WIPO (PCT)
Prior art keywords
moving image
sound data
reproduction
data
control
Prior art date
Application number
PCT/JP2008/002904
Other languages
French (fr)
Japanese (ja)
Inventor
北林巧巳
Original Assignee
株式会社ドリームボート
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ドリームボート filed Critical 株式会社ドリームボート
Priority to PCT/JP2008/002904 priority Critical patent/WO2010044124A1/en
Publication of WO2010044124A1 publication Critical patent/WO2010044124A1/en

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/36Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
    • G09G5/39Control of the bit-mapped memory
    • G09G5/395Arrangements specially adapted for transferring the contents of the bit-mapped memory to the screen
    • G09G5/397Arrangements specially adapted for transferring the contents of two or more bit-mapped memories to the screen simultaneously, e.g. for mixing or overlay
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0252Improving the response speed
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/18Use of a frame buffer in a display terminal, inclusive of the display panel

Definitions

  • the present invention relates to a technique for realizing download processing and playback processing of moving image data and audio data in a network.
  • FIG. 12 is a diagram illustrating the concept of progressive download.
  • the user terminal P ⁇ b> 10 receives moving image data from a transmitting device having moving image data by progressive download.
  • the moving image data received by the transmission / reception unit P11 is written in the storage unit P12.
  • the playback unit P13 reads out data from the storage unit P12 and starts playback of the moving image.
  • the data recorded in the storage unit P12 is read out and reproduced, which causes some problems. For example, when it takes time to write to or read from the storage unit P12, the time required for these processes becomes a bottleneck and the start of reproduction is delayed.
  • an object of the present invention is to propose a technique that enables playback processing of moving images and sounds without being affected by the time required for writing and reading data to and from the storage unit.
  • the present invention is a user terminal device comprising a receiving means, a storing means, a reproducing means and a control means.
  • the receiving means receives moving image / sound data via a network.
  • the moving image / sound data indicates moving image data including sound, moving image data not including sound, or sound only data not including a moving image.
  • the receiving means receives moving image / sound data from another information processing apparatus such as a distribution server that distributes moving image / sound data via a network.
  • the storage means stores moving image / audio data.
  • the reproduction means reproduces moving image / audio data.
  • the control means transfers the received moving image / sound data to the storage means and the reproduction means. In such a user terminal device, the storage means stores the moving image / audio data transferred from the control means.
  • the storage means may be configured using a storage device such as a hard disk, or may be configured using a device that performs recording on a recording medium such as a DVD recorder.
  • the reproducing unit reproduces the moving image / sound data transferred from the control unit, not the moving image / sound data stored in the storage unit.
  • the moving image / sound data received by the receiving means is delivered in parallel to the storage means and the reproducing means by the control means. Then, when reproducing the moving image / sound, the reproducing unit uses the moving image / sound data received from the control unit instead of reading out the moving image / sound data from the storage unit. For this reason, the moving image / sound reproduction processing by the reproducing unit is not affected by the time required to write or read data in the storage unit. Therefore, the moving image / sound reproduction process can be performed without being affected by the time required for writing or reading data to / from the storage means.
  • the video / audio data may be configured to include a plurality of content blocks.
  • the moving image / audio data may be divided into fixed-length blocks, or may be divided into a plurality of content blocks according to the time axis at the time of reproduction.
  • Each content block is preferably configured to be playable even if at least the subsequent content block is not received.
  • the control means may be configured to transfer the content block to the reproduction means in accordance with the reproduction timing of each content block. Further, the reproduction means may be configured to reproduce the moving image / audio data by reproducing the content block transferred by the control means.
  • the data transfer speed is increased by the process of receiving moving image / audio data from a plurality of information processing apparatuses (multiplex transfer process), and the playback process by the playback means (data from the storage means) Reproduction processing without reading) can be realized.
  • the moving image / audio data may be configured to include a control identification code indicating whether or not to be stored.
  • the control unit may be configured to determine whether to transfer the received moving image / audio data to the storage unit based on the control identification code, and to perform transfer based on the determination result.
  • the moving image / audio data may be configured to include a control identification code indicating whether or not to be reproduced.
  • the control means may be configured to determine whether to transfer the received moving image / sound data to the reproduction means based on the control identification code, and to transfer based on the determination result.
  • recording and playback are automatically controlled according to the situation on the side that transmits video / audio data and the situation on the side that receives video / audio data. It becomes possible to do.
  • Such an effect is due to the fact that the reproduction means in the present invention realizes reproduction processing without reading data from the storage means. That is, when such playback processing cannot be performed (that is, in the case of conventional progressive download), it is assumed that moving image / audio data is read from the storage means and played back, so playback without storing in the storage means I could't select the process to do. Further, in the streaming process, it is not possible to select recording even if it can be reproduced in reverse. According to the present invention, it is possible to easily control recording and reproduction according to circumstances in each direction by controlling the control means.
  • the present invention may be specified as a program for causing an information processing apparatus to operate as the above-described user terminal device. Further, the present invention may be specified as a moving image / audio data receiving method performed by the above-described user terminal device.
  • FIG. 1 is a diagram showing a configuration example of a data providing system in the first embodiment and the third embodiment.
  • FIG. 2 is a diagram illustrating an example of functional blocks of a user terminal in the first embodiment and the third embodiment.
  • FIG. 3 is a diagram illustrating an example of functional blocks of the transmission device in the first embodiment and the third embodiment.
  • FIG. 4 is a flowchart showing an operation example of the user terminal in the first embodiment.
  • FIG. 5 is a diagram showing a configuration example of the data providing system in the second embodiment.
  • FIG. 6 is a diagram showing an example of moving image data handled in the second embodiment.
  • FIG. 7 is a diagram illustrating an example of functional blocks of the user terminal in the second embodiment.
  • FIG. 1 is a diagram showing a configuration example of a data providing system in the first embodiment and the third embodiment.
  • FIG. 2 is a diagram illustrating an example of functional blocks of a user terminal in the first embodiment and the third embodiment.
  • FIG. 3 is a diagram illustrating an example of
  • FIG. 8 is a diagram illustrating an example of functional blocks of the transmission device according to the second embodiment.
  • FIG. 9 is a flowchart showing a specific example of flow rate control in the second embodiment.
  • FIG. 10 is a diagram showing an outline of the multiplex transfer process in the second embodiment.
  • FIG. 11 is a flowchart showing an operation example of the user terminal in the third embodiment.
  • FIG. 12 is a diagram showing the concept of progressive download in the prior art.
  • FIG. 1 is a diagram illustrating a configuration example of a data providing system 100A.
  • the data providing system 100A includes a user terminal 10A and a transmission device 20A.
  • the user terminal 10 ⁇ / b> A is an information processing apparatus used to receive desired moving image or audio data when operated by a user.
  • the transmitting device 20A is an information processing device for transmitting (providing) data desired by the user of the user terminal 10A to the user terminal 10A via the network.
  • explanation of audio data is omitted, but it is also possible to handle audio-only data as in the case of moving image data.
  • the user terminal 10A and the transmission device 20A are connected using a network such as the Internet.
  • the communication mode between the user terminal 10A and the transmission device 20A need not be limited to the Internet, and may be configured using any communication mode such as LAN (Local Area Network) or WAN (Wide Area Network). May be.
  • LAN Local Area Network
  • WAN Wide Area Network
  • a plurality of user terminals 10A and transmission devices 20A may be connected to the network of FIG.
  • each device included in the data providing system 100A will be described.
  • the user terminal 10A includes a storage device, an arithmetic device, and a communication control device (such as a network interface device) connected via a bus, and operates according to the program by processing the program stored in the storage device in the arithmetic device. Specifically, it can be configured using an information processing apparatus such as a personal computer, a PDA (Personal Digital Assistance), or a mobile phone.
  • FIG. 2 is a diagram illustrating an example of functional blocks of the user terminal 10A.
  • the user terminal 10 ⁇ / b> A functions as a device including a transmission / reception unit 11, a receiver 12 ⁇ / b> A, a storage unit 13, a reproduction unit 14, and an output unit 15. Next, each functional unit included in the user terminal 10A will be described.
  • the transmission / reception unit 11 controls the communication control device connected to the user terminal 10A in order to transmit / receive data to / from the transmission device 20A via the network.
  • the technology employed for this communication control device is not particularly limited.
  • this communication control device may be configured as a device for connecting to a network by wireless communication, or may be configured as a device for connecting to a network by wired communication.
  • the transmission / reception unit 11 is configured according to a technique employed for connection to a network. Examples of technologies that can be employed include technologies such as Ethernet (registered trademark), dedicated lines, ADSL, FTTH, and wireless LAN.
  • the receiver 12 ⁇ / b> A passes the data received by the transmission / reception unit 11 to the storage unit 13 and the reproduction unit 14. Details of the processing of the receiver 12A will be described when the flowchart is described.
  • the storage unit 13 stores moving image data received from the receiver 12A.
  • the storage unit 13 is configured using a storage device such as a hard disk, a semiconductor storage device, or a magneto-optical disk.
  • the storage unit 13 may be configured using a device that writes data to a recording medium, such as a DVD (Digital Versatile Disc) writing device or a CD (Compact Disc) writing device. In this case, the moving image data is recorded on a recording medium (DVD, CD, etc.).
  • the reproducing unit 14 reproduces moving image data received from the receiver 12A.
  • the reproducing unit 14 outputs an image and sound to the output unit 15 when reproducing moving image data. Details of the processing of the reproduction unit 14 will be described when the flowchart is described.
  • the output unit 15 controls the output of characters / images and sounds in accordance with instructions from the playback unit 14.
  • the output unit 15 issues an output instruction to the output device connected to the user terminal 10A.
  • the output device may be provided integrally with the user terminal 10A.
  • the output device is an image output device such as a CRT display (Cathode Ray Tube display), a liquid crystal display, or an organic EL display, or an audio output device such as a speaker.
  • the transmission device 20A includes a storage device, an arithmetic device, and a communication control device (such as a network interface device) connected via a bus, and operates according to the program by processing the program stored in the storage device in the arithmetic device. Specifically, it can be configured using an information processing apparatus such as a personal computer, a server apparatus, a PDA (Personal Digital Assistance), or a mobile phone.
  • FIG. 3 is a diagram illustrating an example of functional blocks of the transmission device 20A.
  • the transmitting device 20A functions as a device including a transmitting / receiving unit 21, a control unit 22A, and a storage unit 23. Next, each functional unit included in the transmission device 20A will be described.
  • the transmission / reception unit 21 controls a communication control device connected to the transmission device 20A in order to transmit / receive data to / from the user terminal 10A via the network.
  • the technology employed for this communication control device is not particularly limited.
  • this communication control device may be configured as a device for connecting to a network by wireless communication, or may be configured as a device for connecting to a network by wired communication.
  • the transmission / reception unit is configured according to the technology employed for connection to the network. Examples of technologies that can be employed include technologies such as Ethernet, dedicated lines, ADSL, FTTH, and wireless LAN.
  • the control unit 22A transmits the moving image data stored in the storage unit 23 to the user terminal 10A via the transmission / reception unit 21.
  • the control unit 22A performs control for transmitting moving image data designated by the user terminal 10A.
  • the storage unit 23 stores moving image data.
  • the storage unit 23 is configured using a storage device such as a hard disk, a semiconductor storage device, or a magneto-optical disk.
  • the storage unit 23 may be configured using a device that reads data from a recording medium, such as a DVD reading device or a CD reading device. In this case, the moving image data is recorded on a recording medium (DVD, CD, etc.).
  • FIG. 4 is a flowchart showing an operation example of the user terminal 10A. An operation example of the user terminal 10A will be described with reference to FIG.
  • the receiver 12A requests the transmission apparatus 20A to transmit moving image data via the transmission / reception unit 11 (S101).
  • the transmitting device 20A starts transmitting the requested moving image data to the user terminal 10A that is the request source.
  • HTTP HyperTextcolTransfer ⁇ ⁇ ⁇ Protocol
  • HTTP may be applied, and other protocols may be used. May be applied.
  • the receiver 12A sequentially receives moving image data from the transmission device 20A via the transmission / reception unit 11.
  • the receiver 12A sequentially passes received data to the storage unit 13 (S102) and records moving image data in the storage unit 13 (S103), as in a general download process.
  • the receiver 12A also sequentially passes the received data to the reproduction unit 14 (S104).
  • the reproducing unit 14 reproduces moving image data based on the data received from the receiver 12A (S105).
  • the moving image data received from the transmission device 20 is delivered in parallel to the storage unit 13 and the reproduction unit 14 by the receiver 12A.
  • the reproduction unit 14 uses the moving image data received from the receiver 12 ⁇ / b> A instead of reading the moving image data from the storage unit 13 when reproducing the moving image.
  • the moving image playback processing by the playback unit 14 is not affected by the time required to write or read data in the storage unit 13.
  • Such an effect becomes particularly prominent when a configuration that requires a long time for data writing is employed, such as when the storage unit 13 is configured using a DVD recording apparatus.
  • the moving image data transmitted from the transmission device 20A to the user terminal 10A may be encrypted data.
  • the receiver 12A in the user terminal 10A is configured to perform decoding. That is, the receiver 12A decodes the moving image data received from the transmitting device 20A via the transmission / reception unit 11, and passes the decoded moving image data to the storage unit 13 and the reproduction unit 14.
  • the receiver 12 ⁇ / b> A may be configured to pass the encrypted moving image data to the storage unit 13 and pass the decrypted moving image data to the reproduction unit 14.
  • the receiver 12A may be configured to pass the encrypted data to the reproduction unit 14 and perform the reproduction by the decoding unit 14 performing the decryption.
  • FIG. 5 is a diagram illustrating a configuration example of the data providing system 100B.
  • the data providing system 100B includes a user terminal 10B and a plurality of transmission devices 20B.
  • the user terminal 10B is an information processing apparatus that is used to receive desired data when operated by a user.
  • the transmission device 20B is an information processing device for transmitting (providing) data desired by the user of the user terminal 10B to the user terminal 10B via the network.
  • FIG. 6 is a diagram illustrating an example of moving image data in the data providing system 100B.
  • the moving image data is divided into a plurality of content blocks, and the total number of content blocks is held as the number of content blocks.
  • the content block is obtained by dividing data necessary for reproduction of a moving image into a plurality of pieces in time series. For example, N minutes of moving image data is configured as N content blocks of 0 to 1 minute, 1 to 2 minutes,... N ⁇ 1 minutes to N minutes.
  • the user terminal 10B can reproduce the moving image of 0 to 1 minute without receiving the subsequent content block. It becomes possible.
  • the content block does not necessarily have to be configured in units of one minute as described above, and can be configured in a shorter unit or a longer unit. Note that the number of content blocks may be included in the content header. In the following description, for convenience, the content blocks are numbered and numbers 1 to N are assigned in order from the top (example: content block 1, content block N).
  • the user terminal 10B may be configured to receive all of the moving image data (all of the content blocks) from one transmission device 20B, or a plurality of transmission devices 20B. May be configured to receive content blocks of moving image data in a distributed manner. Then, the user terminal 10B appropriately reproduces the content block of the received moving image data, and finally records it as one moving image data.
  • the user terminal 10B and the transmission device 20B are connected using a network such as the Internet.
  • the communication mode between the user terminal 10B and the transmission device 20B is not limited to the Internet, and any communication mode such as a LAN or WAN may be used.
  • a plurality of user terminals 10B may be connected to the network of FIG. In FIG. 5, a plurality of transmission apparatuses 20B are connected, but only one transmission apparatus 20B may be connected as shown in FIG.
  • each device included in the data providing system 100B will be described.
  • FIG. 7 is a diagram illustrating an example of functional blocks of the user terminal 10B.
  • the user terminal 10B is different from the user terminal 10A in that it includes a receiver 12B instead of the receiver 12A.
  • a part of the user terminal 10B different from the user terminal 10A will be described.
  • the receiver 12B receives a content block of moving image data from the transmission device 20B via the transmission / reception unit 11.
  • the method by which the receiver 12B passes the content block to the storage unit 13 is not particularly limited.
  • the receiver 12B performs flow rate control when delivering the content block to the playback unit 14. For this reason, the timing at which a certain content block received by the transmission / reception unit 11 is passed to the storage unit 13 and the reproduction unit 14 by the receiver 12B does not necessarily match.
  • the receiver 12B determines a content block including a moving image to be reproduced in accordance with the reproduction of the moving image in the reproducing unit 14, and passes this to the reproducing unit 14. For example, if the reproduction of the next content block 2 is started before the reproduction of the content block 1 is finished, there will be a problem for the user because the reproduction of the moving image is skipped. On the other hand, if the reproduction of the content block 2 is not started for a while after the reproduction of the content block 1 is finished, the reproduction of the moving image is stopped for the user. In order to solve such a problem, flow control is performed. A specific example of the flow rate control process will be described when the flowchart is described.
  • FIG. 8 is a diagram illustrating an example of functional blocks of the transmission device 20B.
  • the transmission device 20B is different from the transmission device 20A in that it includes a control unit 22B instead of the control unit 22A.
  • the transmission device 20B will be described with respect to parts different from the transmission device 20A.
  • the control unit 22B transmits the content block to the user terminal 10B.
  • the control unit 22B is configured to transmit the content blocks stored in the storage unit 23 to the user terminal 10B.
  • the control unit 22B divides the moving image data into content blocks and transmits the content blocks to the user terminal 10B. Configured.
  • FIG. 9 is a flowchart showing a specific example of flow rate control by the receiver 12B. This flow control is executed in the process of S104 in the flowchart of FIG.
  • the receiver 12B When the flow control is started, the receiver 12B first acquires the current time as the start time (TS) (S201). Next, the receiver 12B acquires a content block to be passed to the playback unit 14 next, and acquires a playback start time (T1) from the content block (S202).
  • the “content block to be passed to the playback unit 14” is the content block 1 if playback has not started yet, and the next block of the content block currently played back if playback has already started. It is a content block.
  • the reproduction start time (T1) indicates an elapsed time from the start of reproduction of the moving image data to the start of reproduction of the content block.
  • the receiver 12B acquires the current time as T2 (S203). Then, the receiver 12B determines whether to pass this content block to the playback unit 14 using T1, T2, and TS (S204). In FIG. 9, the receiver 12B determines whether or not the elapsed time (T2-TS) has exceeded the playback start time (T1) of the content block. When the elapsed time does not exceed the reproduction start time (S205—NO), the receiver 12B repeats the processes after S203. On the other hand, when the elapsed time exceeds the playback start time (S205—YES), the receiver 12B passes this content block to the playback unit 14 (S206). In this case, the reproducing unit 14 performs the process of S105 in the flowchart of FIG.
  • the reproducing unit 14 reproduces a moving image using the content block passed from the receiver 12B by the flow rate control.
  • the flow rate control performed by the receiver 12B in S104 and the regeneration process performed by the regeneration unit 14 in S105 are performed in parallel.
  • the receiver 12B determines whether or not all content blocks have been passed to the playback unit 14 (S207).
  • This determination may be implemented in any way. For example, it may be realized by the receiver 12B acquiring the number of content blocks in advance and counting the number of content blocks passed to the playback unit 14. In this case, the implementation for acquiring the number of content blocks may be realized in any way.
  • the number of content blocks may be received by the receiver 12B as single data before the content block 1 is received as shown in FIG. 6, may be included in the content header, or included in the content block 1 It may be.
  • the last content block may include a flag indicating that the content block is the last content block, and the receiver 12B may make the determination in S207 based on the flag.
  • the receiver 12B performs the processing from S202 onward. On the other hand, when the processing is completed for all the content blocks (S207-YES), the flow rate control processing is completed.
  • FIG. 10 is a diagram showing a specific example of such processing (hereinafter referred to as “multiplex transfer processing”).
  • the user terminal 10B receives the content block 1 from the transmission device 1 and the content block 2 from the transmission device 2 in parallel.
  • Such multiplex transfer processing can be realized, for example, by connecting a plurality of transmission apparatuses 20B and user terminals 10B using a peer-to-peer network. Specifically, it can be realized by using a function such as Winny's multiple download function or Skew Cast, but what kind of implementation is actually used may be appropriately determined by the designer of the data providing system 100B.
  • the user terminal 10B and the transmission device 20B may be connected using a client server type network.
  • the user terminal 10B serves as a client
  • the transmission device 20B serves as a server.
  • the user terminal 10B and the transmission device 20B may be connected using a peer-to-peer network.
  • the user terminal 10B is an information processing apparatus connected to a peer-to-peer network, and is an information processing apparatus used to receive desired moving image data, particularly when operated by a user.
  • the transmitting device 20B is an information processing device connected to the same peer-to-peer network as the user terminal 10B, and is an information processing device for transmitting (providing) moving image data desired by the user.
  • the user terminal 10B knows which information processing device (transmitting device 20B) has moving image data that the user desires to receive in a peer-to-peer network to which a plurality of information processing devices are connected.
  • any method may be adopted depending on the technology of the peer-to-peer network applied to the data providing system 100B according to the present invention.
  • the moving image data transmitted from the transmission device 20B to the user terminal 10B may be encrypted data.
  • the moving image data may be configured to be encrypted for each data block, or may be encrypted in a smaller unit.
  • the receiver 12B in the user terminal 10B is configured to receive one encrypted data unit (for example, a data block) and perform decryption on it. That is, the receiver 12B decodes the moving image data received from the transmission device 20B via the transmission / reception unit 11, and passes the decoded moving image data to the storage unit 13 and the reproduction unit 14.
  • the receiver 12 ⁇ / b> B may be configured to pass the encrypted moving image data to the storage unit 13 and pass the decoded moving image data to the reproduction unit 14. Further, the receiver 12B may be configured to pass the encrypted data to the reproduction unit 14, and the reproduction unit 14 performs the reproduction by performing the decryption.
  • the entire moving image data is configured as a single encrypted file, it can only be played after it has been received, but it is encrypted in units of data blocks or smaller units in this way. As a result, the playback timing can be advanced.
  • the decryption process by the receiver 12B may be executed as a process for decrypting the content block to be processed, for example, before the process of S201 in FIG. 9 or after the process of S101 in FIG. .
  • each moving image data is controlled for handling in the user terminal 10C.
  • This control is “control recorded in the storage unit 13 and reproduction processing by the reproduction unit 14 is not executed”, “control that is not recorded in the storage unit 13 and reproduction processing by the reproduction unit 14 is executed”, “storage unit 13 is selected from the “controls recorded in 13 and playback processing by the playback unit 14 is also executed”.
  • This control is realized by adding a control identification code to the moving image data and making a determination based on the control identification code by the receiver 12C.
  • This control identification code may be determined by any method.
  • the transmission device 20C when moving image data is stored in the transmission device 20C, an administrator of the transmission device 20C may be able to determine. Further, for example, the user terminal 10C may be configured to appropriately determine the user of the user terminal 10C by notifying the transmission apparatus 20C of the control identification code.
  • each device included in the data providing system 100C will be described.
  • the user terminal 10C is different from the user terminal 10A in that it includes a receiver 12C instead of the receiver 12A.
  • a part of the user terminal 10C different from the user terminal 10A will be described.
  • the receiver 12C receives moving image data from the transmission device 20B via the transmission / reception unit 11.
  • the receiver 12C acquires a control identification code for the moving image data, and performs processing based on the control identification code. That is, the receiver 12 ⁇ / b> C determines whether to transfer moving image data to the storage unit 13 and whether to transfer moving image data to the playback unit 14 based on the control identification code.
  • a specific example of this processing will be described when explaining the flowchart.
  • FIG. 11 is a flowchart illustrating an operation example of the receiver 12C.
  • the same processes as those in the flowchart of FIG. 4 are denoted by the same reference numerals.
  • the receiver 12C requests the transmission apparatus 20C to transmit moving image data via the transmission / reception unit 11 (S101).
  • the transmitting device 20C starts transmitting the requested moving image data to the user terminal 10C that is the request source.
  • data is transmitted and received using HTTP.
  • HTTP may be applied or another protocol may be applied. .
  • the receiver 12C acquires a control identification code for the received moving image data (S111). Then, the receiver 12C determines subsequent processing based on the content of the acquired control identification code.
  • the control identification code indicates only recording (S112—only recording)
  • the receiver 12C starts data transfer to the recording unit 13 (S102), and the recording unit 13 records moving image data (S103). In this case, data transfer to the playback unit 14 and playback processing by the playback unit 14 are not performed.
  • control identification code indicates only reproduction (S112-reproduction only)
  • the receiver 12C starts data transfer to the reproduction unit 14 (S104), and the reproduction unit 14 reproduces moving image data (S105). In this case, data transfer to the recording unit 13 and data writing to the recording unit 13 are not performed.
  • control identification code indicates recording and reproduction (S112—recording and reproduction)
  • the receiver 12C performs data transfer to the recording unit 13 (S102) and data transfer to the reproduction unit 14 (S104). This is the same as the processing in the embodiment.
  • control identification code is set to “reproduction only”, so that control based on copyrights can be easily performed.
  • the user of the user terminal 10C it is possible to freely control whether the recording is accompanied by reproduction or the recording not accompanied by reproduction according to the circumstances of the occasion, so that the convenience of the user can be achieved.
  • reproduction without recording may be desired, and it is possible to appropriately respond to such a request.
  • the process based on the control identification code may be applied to the second embodiment.
  • the data providing system may be configured to perform processing based on the control identification code and flow control processing.
  • the moving image data may be configured to be encrypted, and the receiver 12C may be configured to perform the decryption.

Abstract

The reproduction processing of a moving image by a reproduction means is not affected by the time required to write and read data to and from a storage means. Thus, the reproduction processing of the moving image is made possible without being affected by the time required to write and read the data thereto and therefrom. The moving image data received by a reception means is passed to the storage means and reproduction means in parallel by a control means. The reproduction means uses the moving image data received from the control section instead of reading the moving image data from the storage means when reproducing the moving image.

Description

ユーザ端末装置User terminal device
 本発明は、ネットワークにおいて、動画像データや音声データのダウンロード処理や再生処理を実現する技術に関する。 The present invention relates to a technique for realizing download processing and playback processing of moving image data and audio data in a network.
  近年、情報処理ネットワークにおけるデータ転送速度は飛躍的に向上している。この向上に伴い、サイズが大きい動画像データや音声データのダウンロードや、動画像や音声のストリーミング配信などが実現され、広く普及している。以下、背景技術及び課題について、動画像や音声のデータに共通する説明であるため、動画像についてのみ説明する。 In recent years, the data transfer speed in information processing networks has improved dramatically. Along with this improvement, downloading of moving image data and audio data having a large size, streaming distribution of moving images and audio, and the like have been realized and widely spread. In the following, since the background art and the subject matter are common descriptions for moving image and audio data, only the moving image will be described.
 ところで、動画像データのダウンロードを行う場合、動画像データを完全にダウンロードしてからでなければ、動画像を再生することができなかった。このため、ダウンロードに時間を要する場合には、動画像の閲覧が遅れてしまうという問題があった。 By the way, when downloading moving image data, the moving image cannot be reproduced unless the moving image data is completely downloaded. For this reason, when time is required for downloading, there is a problem that browsing of moving images is delayed.
 このような問題に対し、動画像データのプログレッシブダウンロード(疑似ストリーミング)という技術が提案されている(特許文献1参照)。図12は、プログレッシブダウンロードの概念を示す図である。図12では、ユーザ端末P10は、動画像データを有する送信装置から、動画像データを、プログレッシブダウンロードにより受信する。この場合、ユーザ端末P10では、送受信部P11によって受信された動画像データは、記憶部P12に書き込まれる。そして、再生を開始するために必要な分のデータが記憶部P12に書き込まれると、再生部P13は、記憶部P12からデータを読み出し、動画像の再生を開始する。 To solve such a problem, a technique called progressive download (pseudo streaming) of moving image data has been proposed (see Patent Document 1). FIG. 12 is a diagram illustrating the concept of progressive download. In FIG. 12, the user terminal P <b> 10 receives moving image data from a transmitting device having moving image data by progressive download. In this case, in the user terminal P10, the moving image data received by the transmission / reception unit P11 is written in the storage unit P12. When data necessary for starting playback is written in the storage unit P12, the playback unit P13 reads out data from the storage unit P12 and starts playback of the moving image.
 このように、プログレッシブダウンロードでは、送信装置からダウンロードされる動画像データは、記憶部P12に記録され、さらにダウンロードが完了する前に再生部P13による再生が開始される。従って、再生のタイミングを早めることが可能となる。
特開2006-051351号公報
As described above, in the progressive download, the moving image data downloaded from the transmission device is recorded in the storage unit P12, and further, the reproduction by the reproduction unit P13 is started before the download is completed. Therefore, the playback timing can be advanced.
Japanese Patent Laid-Open No. 2006-051351
 しかしながら、従来のプログレッシブダウンロードによれば、記憶部P12に記録されたデータを読み出して再生を行うため、いくつかの問題を生じていた。例えば、記憶部P12への書き込みや読み出しに時間を要する場合には、これらの処理に要する時間がネックとなり再生開始が遅れてしまっていた。 However, according to the conventional progressive download, the data recorded in the storage unit P12 is read out and reproduced, which causes some problems. For example, when it takes time to write to or read from the storage unit P12, the time required for these processes becomes a bottleneck and the start of reproduction is delayed.
 そこで、本発明では、記憶部へのデータ書き込みや読み出しに要する時間に影響を受けることなく動画像や音声の再生処理を可能とする技術を提案することを目的とする。 Therefore, an object of the present invention is to propose a technique that enables playback processing of moving images and sounds without being affected by the time required for writing and reading data to and from the storage unit.
 本発明は、ユーザ端末装置であって、受信手段、記憶手段、再生手段及び制御手段を備える。受信手段は、ネットワークを介して動画像・音声データを受信する。ここで、動画像・音声データとは、音声を含む動画像のデータや、音声を含まない動画像のデータや、動画像を含まない音声のみのデータを示す。受信手段は、例えば動画像・音声データを配信する配信サーバ等の他の情報処理装置から、ネットワークを介して動画像・音声データを受信する。記憶手段は、動画像・音声データを記憶する。再生手段は、動画像・音声データを再生する。制御手段は、受信された動画像・音声データを、記憶手段及び再生手段に転送する。このようなユーザ端末装置において、記憶手段は、制御手段から転送された動画像・音声データを記憶する。このとき、記憶手段は、ハードディスク等の記憶装置を用いて構成されても良いし、DVDレコーダ等の記録媒体に記録を行う装置を用いて構成されても良い。そして再生手段は、制御手段から動画像・音声データを転送された場合に、記憶手段に記憶された動画像・音声データではなく、制御手段から転送された動画像・音声データを再生する。 The present invention is a user terminal device comprising a receiving means, a storing means, a reproducing means and a control means. The receiving means receives moving image / sound data via a network. Here, the moving image / sound data indicates moving image data including sound, moving image data not including sound, or sound only data not including a moving image. The receiving means receives moving image / sound data from another information processing apparatus such as a distribution server that distributes moving image / sound data via a network. The storage means stores moving image / audio data. The reproduction means reproduces moving image / audio data. The control means transfers the received moving image / sound data to the storage means and the reproduction means. In such a user terminal device, the storage means stores the moving image / audio data transferred from the control means. At this time, the storage means may be configured using a storage device such as a hard disk, or may be configured using a device that performs recording on a recording medium such as a DVD recorder. When the moving image / sound data is transferred from the control unit, the reproducing unit reproduces the moving image / sound data transferred from the control unit, not the moving image / sound data stored in the storage unit.
 このように構成されることにより、受信手段により受信された動画像・音声データは、制御手段によって、記憶手段と再生手段とに並列的に渡される。そして、再生手段は、動画像・音声の再生を行うにあたって、記憶手段から動画像・音声データを読み出すのではなく、制御部から受け取った動画像・音声データを用いる。このため、再生手段による動画像・音声の再生処理は、記憶手段へのデータ書き込みや読み出しに要する時間に影響を受けることがない。従って、記憶手段へのデータ書き込みや読み出しに要する時間に影響を受けることなく動画像・音声の再生処理が可能となる。 With this configuration, the moving image / sound data received by the receiving means is delivered in parallel to the storage means and the reproducing means by the control means. Then, when reproducing the moving image / sound, the reproducing unit uses the moving image / sound data received from the control unit instead of reading out the moving image / sound data from the storage unit. For this reason, the moving image / sound reproduction processing by the reproducing unit is not affected by the time required to write or read data in the storage unit. Therefore, the moving image / sound reproduction process can be performed without being affected by the time required for writing or reading data to / from the storage means.
 本発明において、動画像・音声データは、複数のコンテンツブロックから構成されるように構成されても良い。例えば、動画像・音声データは、固定長ブロックで分割されても良いし、その再生時における時間軸に従って複数のコンテンツブロックに分割されても良い。なお、各コンテンツブロックは、少なくとも後に続くコンテンツブロックが受信されなくとも再生可能に構成されることが望ましい。制御手段は、再生手段には、各コンテンツブロックの再生されるタイミングに応じてコンテンツブロックを転送するように構成されても良い。また、再生手段は、制御手段によって転送されたコンテンツブロックを再生することで動画像・音声データの再生を行うように構成されても良い。 In the present invention, the video / audio data may be configured to include a plurality of content blocks. For example, the moving image / audio data may be divided into fixed-length blocks, or may be divided into a plurality of content blocks according to the time axis at the time of reproduction. Each content block is preferably configured to be playable even if at least the subsequent content block is not received. The control means may be configured to transfer the content block to the reproduction means in accordance with the reproduction timing of each content block. Further, the reproduction means may be configured to reproduce the moving image / audio data by reproducing the content block transferred by the control means.
 このように構成されることにより、動画像・音声データの転送が途中で失敗したとしても、動画像・音声データの先頭から再送する必要が無く、転送失敗時の再送信に必要な通信コストを削減することが可能となる。 With this configuration, even if the transfer of moving image / sound data fails in the middle, there is no need to retransmit from the beginning of the moving image / sound data, and the communication cost required for retransmission at the time of transfer failure is reduced. It becomes possible to reduce.
 また、このように構成されることにより、複数の情報処理装置から動画像・音声データを受信する処理(多重転送処理)によるデータ転送の高速化と、再生手段による再生処理(記憶手段からのデータ読み出しを伴わない再生処理)とを実現させることが可能となる。 Further, with this configuration, the data transfer speed is increased by the process of receiving moving image / audio data from a plurality of information processing apparatuses (multiplex transfer process), and the playback process by the playback means (data from the storage means) Reproduction processing without reading) can be realized.
 本発明において、動画像・音声データは、記憶されるべきか否かを示す制御識別符号を含むように構成されても良い。この場合、制御手段は、制御識別符号に基づいて、受信された動画像・音声データを記憶手段に転送するか判断し、判断結果に基づいて転送を行うように構成されても良い。 In the present invention, the moving image / audio data may be configured to include a control identification code indicating whether or not to be stored. In this case, the control unit may be configured to determine whether to transfer the received moving image / audio data to the storage unit based on the control identification code, and to perform transfer based on the determination result.
 また、本発明において、動画像・音声データは、再生されるべきか否かを示す制御識別符号を含むように構成されても良い。この場合、制御手段は、制御識別符号に基づいて、受信された動画像・音声データを再生手段に転送するか判断し、判断結果に基づいて転送を行うように構成されても良い。 In the present invention, the moving image / audio data may be configured to include a control identification code indicating whether or not to be reproduced. In this case, the control means may be configured to determine whether to transfer the received moving image / sound data to the reproduction means based on the control identification code, and to transfer based on the determination result.
 このように構成されることにより、動画像・音声データを送信する側の事情や、動画像・音声データを受信する側の事情などに応じて、記録の有無や再生の有無を自動的に制御することが可能となる。このような効果は、本願発明における再生手段が記憶手段からのデータ読み出しを行うことなく再生処理を実現させていることによる。即ち、このような再生処理ができない場合(即ち従来のプログレッシブダウンロードの場合)は、記憶手段から動画像・音声データを読み出して再生することが前提となっていたため、記憶手段に記憶させることなく再生するという処理を選択することができなかった。また、ストリーミング処理では、逆に再生することができても記録することを選択することはできなかった。本願発明によれば、制御手段の制御により、各方面の事情に応じて記録や再生を容易に制御することが可能となる。 By being configured in this way, recording and playback are automatically controlled according to the situation on the side that transmits video / audio data and the situation on the side that receives video / audio data. It becomes possible to do. Such an effect is due to the fact that the reproduction means in the present invention realizes reproduction processing without reading data from the storage means. That is, when such playback processing cannot be performed (that is, in the case of conventional progressive download), it is assumed that moving image / audio data is read from the storage means and played back, so playback without storing in the storage means I couldn't select the process to do. Further, in the streaming process, it is not possible to select recording even if it can be reproduced in reverse. According to the present invention, it is possible to easily control recording and reproduction according to circumstances in each direction by controlling the control means.
 本発明は、情報処理装置を、上記したユーザ端末装置として動作させるためのプログラムとして特定されても良い。また、本発明は、上記したユーザ端末装置が行う動画像・音声データ受信方法として特定されても良い。 The present invention may be specified as a program for causing an information processing apparatus to operate as the above-described user terminal device. Further, the present invention may be specified as a moving image / audio data receiving method performed by the above-described user terminal device.
 本発明により、記憶部へのデータ書き込みや読み出しに要する時間に影響を受けることなく動画像や音声の再生処理を実行することが可能となる。 According to the present invention, it is possible to execute a moving image or audio reproduction process without being affected by the time required for writing or reading data to or from the storage unit.
図1は第一実施形態及び第三実施形態におけるデータ提供システムの構成例を示す図である。FIG. 1 is a diagram showing a configuration example of a data providing system in the first embodiment and the third embodiment. 図2は第一実施形態及び第三実施形態におけるユーザ端末の機能ブロック例を示す図である。FIG. 2 is a diagram illustrating an example of functional blocks of a user terminal in the first embodiment and the third embodiment. 図3は第一実施形態及び第三実施形態における送信装置の機能ブロック例を示す図である。FIG. 3 is a diagram illustrating an example of functional blocks of the transmission device in the first embodiment and the third embodiment. 図4は第一実施形態におけるユーザ端末の動作例を示すフローチャートである。FIG. 4 is a flowchart showing an operation example of the user terminal in the first embodiment. 図5は第二実施形態におけるデータ提供システムの構成例を示す図である。FIG. 5 is a diagram showing a configuration example of the data providing system in the second embodiment. 図6は第二実施形態で取り扱われる動画像データの例を示す図である。FIG. 6 is a diagram showing an example of moving image data handled in the second embodiment. 図7は第二実施形態におけるユーザ端末の機能ブロック例を示す図である。FIG. 7 is a diagram illustrating an example of functional blocks of the user terminal in the second embodiment. 図8は第二実施形態における送信装置の機能ブロック例を示す図である。FIG. 8 is a diagram illustrating an example of functional blocks of the transmission device according to the second embodiment. 図9は第二実施形態における流量制御の具体例を示すフローチャートである。FIG. 9 is a flowchart showing a specific example of flow rate control in the second embodiment. 図10は第二実施形態における多重転送処理の概要を示す図である。FIG. 10 is a diagram showing an outline of the multiplex transfer process in the second embodiment. 図11は第三実施形態におけるユーザ端末の動作例を示すフローチャートである。FIG. 11 is a flowchart showing an operation example of the user terminal in the third embodiment. 図12は従来技術におけるプログレッシブダウンロードの概念を示す図である。FIG. 12 is a diagram showing the concept of progressive download in the prior art.
符号の説明Explanation of symbols
 10  ユーザ端末
 11  送受信部
 12  レシーバ
 13  記憶部
 14  再生部
 15  出力部
 20  送信装置
 21  送受信部
 22  制御部
 23  記憶部
 100  データ提供システム
DESCRIPTION OF SYMBOLS 10 User terminal 11 Transmission / reception part 12 Receiver 13 Storage part 14 Playback part 15 Output part 20 Transmission apparatus 21 Transmission / reception part 22 Control part 23 Storage part 100 Data provision system
 [第一実施形態]
 〔システム構成〕
 まず、本発明におけるデータ提供システムの第一実施形態である、データ提供システム100Aの構成例について説明する。図1は、データ提供システム100Aの構成例を示す図である。データ提供システム100Aは、ユーザ端末10A及び送信装置20Aを含む。ユーザ端末10Aは、ユーザが操作することによって所望の動画像や音声のデータを受信するために使用される情報処理装置である。送信装置20Aは、ユーザ端末10Aのユーザが所望するデータを、ネットワークを介してユーザ端末10Aに送信(提供)するための情報処理装置である。なお、以下の説明では、音声データについての説明を省略するが、動画像のデータの取扱いと同様に、音声のみのデータを取り扱うことも可能である。
[First embodiment]
〔System configuration〕
First, a configuration example of a data providing system 100A that is a first embodiment of the data providing system according to the present invention will be described. FIG. 1 is a diagram illustrating a configuration example of a data providing system 100A. The data providing system 100A includes a user terminal 10A and a transmission device 20A. The user terminal 10 </ b> A is an information processing apparatus used to receive desired moving image or audio data when operated by a user. The transmitting device 20A is an information processing device for transmitting (providing) data desired by the user of the user terminal 10A to the user terminal 10A via the network. In the following description, explanation of audio data is omitted, but it is also possible to handle audio-only data as in the case of moving image data.
 ユーザ端末10Aと送信装置20Aとは、インターネット等のネットワークを用いて接続される。なお、ユーザ端末10Aと送信装置20Aとの間の通信形態はインターネットに限定される必要はなく、LAN(Local Area Network)やWAN(Wide Area Network)等、どのような通信形態を用いて構成されても良い。また、ユーザ端末10A及び送信装置20Aは、図1のネットワークに複数台接続されても良い。以下、データ提供システム100Aに含まれる各装置について説明する。 The user terminal 10A and the transmission device 20A are connected using a network such as the Internet. Note that the communication mode between the user terminal 10A and the transmission device 20A need not be limited to the Internet, and may be configured using any communication mode such as LAN (Local Area Network) or WAN (Wide Area Network). May be. Further, a plurality of user terminals 10A and transmission devices 20A may be connected to the network of FIG. Hereinafter, each device included in the data providing system 100A will be described.
 〈ユーザ端末〉
 ユーザ端末10Aは、バスを介して接続された記憶装置、演算装置及び通信制御装置(ネットワークインタフェース装置など)を含み、記憶装置に記憶されたプログラムを演算装置において処理することによってプログラムに従って動作する。具体的には、パーソナルコンピュータやPDA(Personal Digital Assistance)や携帯電話機などの情報処理装置を用いて構成することができる。図2は、ユーザ端末10Aの機能ブロック例を示す図である。ユーザ端末10Aは送受信部11、レシーバ12A、記憶部13、再生部14及び出力部15を含む装置として機能する。次に、ユーザ端末10Aに含まれる各機能部について説明する。
<User terminal>
The user terminal 10A includes a storage device, an arithmetic device, and a communication control device (such as a network interface device) connected via a bus, and operates according to the program by processing the program stored in the storage device in the arithmetic device. Specifically, it can be configured using an information processing apparatus such as a personal computer, a PDA (Personal Digital Assistance), or a mobile phone. FIG. 2 is a diagram illustrating an example of functional blocks of the user terminal 10A. The user terminal 10 </ b> A functions as a device including a transmission / reception unit 11, a receiver 12 </ b> A, a storage unit 13, a reproduction unit 14, and an output unit 15. Next, each functional unit included in the user terminal 10A will be described.
 〈〈送受信部〉〉
 送受信部11は、ネットワークを介して送信装置20Aとの間でデータを送受信するために、ユーザ端末10Aに接続された通信制御装置を制御する。この通信制御装置に採用される技術は特に限定されない。例えば、この通信制御装置は、無線通信によってネットワークに接続するための装置として構成されても良いし、有線通信によってネットワークに接続するための装置として構成されても良い。送受信部11は、ネットワークに接続されるために採用される技術に応じて構成される。採用される技術の例として、イーサネット(登録商標)や専用線やADSLやFTTHや無線LAN等の技術がある。
<Transmitter / Transmitter>
The transmission / reception unit 11 controls the communication control device connected to the user terminal 10A in order to transmit / receive data to / from the transmission device 20A via the network. The technology employed for this communication control device is not particularly limited. For example, this communication control device may be configured as a device for connecting to a network by wireless communication, or may be configured as a device for connecting to a network by wired communication. The transmission / reception unit 11 is configured according to a technique employed for connection to a network. Examples of technologies that can be employed include technologies such as Ethernet (registered trademark), dedicated lines, ADSL, FTTH, and wireless LAN.
 〈〈レシーバ〉〉
 レシーバ12Aは、送受信部11によって受信されたデータを、記憶部13及び再生部14へ渡す。レシーバ12Aの処理の詳細についての説明は、フローチャートの説明の際に行う。
<Receiver>
The receiver 12 </ b> A passes the data received by the transmission / reception unit 11 to the storage unit 13 and the reproduction unit 14. Details of the processing of the receiver 12A will be described when the flowchart is described.
 〈〈記憶部〉〉
 記憶部13は、レシーバ12Aから受け取る動画像データを記憶する。記憶部13は、ハードディスクや半導体記憶装置や光磁気ディスクなどの記憶装置を用いて構成される。また、記憶部13は、DVD(Digital Versatile Disc)書き込み装置や、CD(Compact Disc)書き込み装置のように、記録媒体にデータを書き込む装置を用いて構成されても良い。この場合、動画像データは記録媒体(DVDやCD等)に記録される。
<< Storage section >>
The storage unit 13 stores moving image data received from the receiver 12A. The storage unit 13 is configured using a storage device such as a hard disk, a semiconductor storage device, or a magneto-optical disk. The storage unit 13 may be configured using a device that writes data to a recording medium, such as a DVD (Digital Versatile Disc) writing device or a CD (Compact Disc) writing device. In this case, the moving image data is recorded on a recording medium (DVD, CD, etc.).
 〈〈再生部〉〉
 再生部14は、レシーバ12Aから受け取る動画像データを再生する。再生部14は、動画像データを再生する際に、出力部15に対して画像や音声の出力を行う。再生部14の処理の詳細は、フローチャートの説明の際に説明する。
<Playback section>
The reproducing unit 14 reproduces moving image data received from the receiver 12A. The reproducing unit 14 outputs an image and sound to the output unit 15 when reproducing moving image data. Details of the processing of the reproduction unit 14 will be described when the flowchart is described.
 〈〈出力部〉〉
 出力部15は、再生部14の指示に従って文字・画像や音声の出力を制御する。出力部15は、ユーザ端末10Aに接続された出力装置に出力の指示を出す。出力装置は、ユーザ端末10Aに一体的に備え付けられていても良い。なお、出力装置とは、CRTディスプレイ(Cathode Ray Tube ディスプレイ),液晶ディスプレイ,有機ELディスプレイ等の画像出力装置や、スピーカー等の音声出力装置等である。
<Output section>
The output unit 15 controls the output of characters / images and sounds in accordance with instructions from the playback unit 14. The output unit 15 issues an output instruction to the output device connected to the user terminal 10A. The output device may be provided integrally with the user terminal 10A. The output device is an image output device such as a CRT display (Cathode Ray Tube display), a liquid crystal display, or an organic EL display, or an audio output device such as a speaker.
 〈送信装置〉
 送信装置20Aは、バスを介して接続された記憶装置、演算装置及び通信制御装置(ネットワークインタフェース装置など)を含み、記憶装置に記憶されたプログラムを演算装置において処理することによってプログラムに従って動作する。具体的には、パーソナルコンピュータやサーバ装置やPDA(Personal Digital Assistance)や携帯電話機などの情報処理装置を用いて構成することができる。図3は、送信装置20Aの機能ブロック例を示す図である。送信装置20Aは送受信部21、制御部22A及び記憶部23を含む装置として機能する。次に、送信装置20Aに含まれる各機能部について説明する。
<Transmitter>
The transmission device 20A includes a storage device, an arithmetic device, and a communication control device (such as a network interface device) connected via a bus, and operates according to the program by processing the program stored in the storage device in the arithmetic device. Specifically, it can be configured using an information processing apparatus such as a personal computer, a server apparatus, a PDA (Personal Digital Assistance), or a mobile phone. FIG. 3 is a diagram illustrating an example of functional blocks of the transmission device 20A. The transmitting device 20A functions as a device including a transmitting / receiving unit 21, a control unit 22A, and a storage unit 23. Next, each functional unit included in the transmission device 20A will be described.
 〈〈送受信部〉〉
 送受信部21は、ネットワークを介してユーザ端末10Aとの間でデータを送受信するために、送信装置20Aに接続された通信制御装置を制御する。この通信制御装置に採用される技術は特に限定されない。例えば、この通信制御装置は、無線通信によってネットワークに接続するための装置として構成されても良いし、有線通信によってネットワークに接続するための装置として構成されても良い。送受信部は、ネットワークに接続されるために採用される技術に応じて構成される。採用される技術の例として、イーサネットや専用線やADSLやFTTHや無線LAN等の技術がある。
<Transmitter / Transmitter>
The transmission / reception unit 21 controls a communication control device connected to the transmission device 20A in order to transmit / receive data to / from the user terminal 10A via the network. The technology employed for this communication control device is not particularly limited. For example, this communication control device may be configured as a device for connecting to a network by wireless communication, or may be configured as a device for connecting to a network by wired communication. The transmission / reception unit is configured according to the technology employed for connection to the network. Examples of technologies that can be employed include technologies such as Ethernet, dedicated lines, ADSL, FTTH, and wireless LAN.
 〈〈制御部〉〉
 制御部22Aは、記憶部23に記憶される動画像データを、送受信部21を介してユーザ端末10Aに送信する。制御部22Aは、ユーザ端末10Aによって指定された動画像データを送信するための制御を行う。
<Control section>
The control unit 22A transmits the moving image data stored in the storage unit 23 to the user terminal 10A via the transmission / reception unit 21. The control unit 22A performs control for transmitting moving image data designated by the user terminal 10A.
 〈〈記憶部〉〉
 記憶部23は、動画像データを記憶する。記憶部23は、ハードディスクや半導体記憶装置や光磁気ディスクなどの記憶装置を用いて構成される。また、記憶部23は、DVD読み出し装置や、CD読み出し装置のように、記録媒体からデータを読み出す装置を用いて構成されても良い。この場合、動画像データは記録媒体(DVDやCD等)に記録されている。
<< Storage section >>
The storage unit 23 stores moving image data. The storage unit 23 is configured using a storage device such as a hard disk, a semiconductor storage device, or a magneto-optical disk. The storage unit 23 may be configured using a device that reads data from a recording medium, such as a DVD reading device or a CD reading device. In this case, the moving image data is recorded on a recording medium (DVD, CD, etc.).
 〔動作例〕
 図4は、ユーザ端末10Aの動作例を示すフローチャートである。図4を用いて、ユーザ端末10Aの動作例について説明する。
[Operation example]
FIG. 4 is a flowchart showing an operation example of the user terminal 10A. An operation example of the user terminal 10A will be described with reference to FIG.
 まず、レシーバ12Aが、送受信部11を介して送信装置20Aに対し、動画像データの送信を要求する(S101)。送信装置20Aは、動画像データの要求を受けると、要求元であるユーザ端末10Aに対し、要求された動画像データの送信を開始する。このとき、一般的にプログレッシブダウンロードではHTTP(HyperText Transfer Protocol)を用いてデータの送受信が実施されるが、本発明のデータ提供システム100Aにおいては、HTTPが適用されても良いし、他のプロトコルが適用されても良い。 First, the receiver 12A requests the transmission apparatus 20A to transmit moving image data via the transmission / reception unit 11 (S101). Upon receiving the request for moving image data, the transmitting device 20A starts transmitting the requested moving image data to the user terminal 10A that is the request source. At this time, generally, in progressive download, data is transmitted and received using HTTP (HyperTextcolTransfer 送 受 信 Protocol). However, in the data providing system 100A of the present invention, HTTP may be applied, and other protocols may be used. May be applied.
 次に、レシーバ12Aは、送受信部11を介して送信装置20Aから、動画像データを順次受信する。レシーバ12Aは、記憶部13に対しては、一般的なダウンロード処理と同様に、受信されたデータを順次渡し(S102)、動画像データを記憶部13に記録する(S103)。また、レシーバ12Aは、再生部14に対しても、受信されたデータを順次渡す(S104)。そして、再生部14は、レシーバ12Aから受け取ったデータに基づいて動画像データの再生を行う(S105)。 Next, the receiver 12A sequentially receives moving image data from the transmission device 20A via the transmission / reception unit 11. The receiver 12A sequentially passes received data to the storage unit 13 (S102) and records moving image data in the storage unit 13 (S103), as in a general download process. The receiver 12A also sequentially passes the received data to the reproduction unit 14 (S104). Then, the reproducing unit 14 reproduces moving image data based on the data received from the receiver 12A (S105).
 〔作用/効果〕
 データ提供システム100Aによれば、送信装置20から受信された動画像データは、レシーバ12Aによって、記憶部13と再生部14に並列的に渡される。そして、再生部14は、動画像の再生を行うにあたって、記憶部13から動画像データを読み出すのではなく、レシーバ12Aから受け取った動画像データを用いる。このため、再生部14による動画像の再生処理は、記憶部13へのデータ書き込みや読み出しに要する時間に影響を受けることがない。このような効果は、記憶部13がDVD記録装置を用いて構成された場合のように、データ書き込みに多くの時間を要する構成が採用された場合に特に顕著となる。
[Action / Effect]
According to the data providing system 100A, the moving image data received from the transmission device 20 is delivered in parallel to the storage unit 13 and the reproduction unit 14 by the receiver 12A. Then, the reproduction unit 14 uses the moving image data received from the receiver 12 </ b> A instead of reading the moving image data from the storage unit 13 when reproducing the moving image. For this reason, the moving image playback processing by the playback unit 14 is not affected by the time required to write or read data in the storage unit 13. Such an effect becomes particularly prominent when a configuration that requires a long time for data writing is employed, such as when the storage unit 13 is configured using a DVD recording apparatus.
 〔変形例〕
 〈データの暗号化について〉
 送信装置20Aからユーザ端末10Aに送信される動画像データは、暗号化されたデータであっても良い。この場合、ユーザ端末10Aにおけるレシーバ12Aは、復号化を実行するように構成される。即ち、レシーバ12Aは、送信装置20Aから送受信部11を介して受信された動画像データを復号化し、復号化された動画像データを記憶部13及び再生部14に渡す。このとき、レシーバ12Aは、記憶部13に対しては暗号化されたままの動画像データを渡し、再生部14に対しては復号化された動画像データを渡すように構成されても良い。また、レシーバ12Aは暗号化されたままのデータを再生部14に渡し、再生部14が復号化を行うことによって再生を実行するように構成されても良い。
[Modification]
<About data encryption>
The moving image data transmitted from the transmission device 20A to the user terminal 10A may be encrypted data. In this case, the receiver 12A in the user terminal 10A is configured to perform decoding. That is, the receiver 12A decodes the moving image data received from the transmitting device 20A via the transmission / reception unit 11, and passes the decoded moving image data to the storage unit 13 and the reproduction unit 14. At this time, the receiver 12 </ b> A may be configured to pass the encrypted moving image data to the storage unit 13 and pass the decrypted moving image data to the reproduction unit 14. Further, the receiver 12A may be configured to pass the encrypted data to the reproduction unit 14 and perform the reproduction by the decoding unit 14 performing the decryption.
 [第二実施形態]
 〔システム構成〕
 次に、本発明におけるデータ提供システムの第二実施形態である、データ提供システム100Bの構成例について説明する。図5は、データ提供システム100Bの構成例を示す図である。データ提供システム100Bは、ユーザ端末10Bと複数台の送信装置20Bとを含む。ユーザ端末10Bは、ユーザが操作することによって所望のデータを受信するために使用される情報処理装置である。送信装置20Bは、ユーザ端末10Bのユーザが所望するデータを、ネットワークを介してユーザ端末10Bに送信(提供)するための情報処理装置である。
[Second Embodiment]
〔System configuration〕
Next, a configuration example of a data providing system 100B, which is a second embodiment of the data providing system according to the present invention, will be described. FIG. 5 is a diagram illustrating a configuration example of the data providing system 100B. The data providing system 100B includes a user terminal 10B and a plurality of transmission devices 20B. The user terminal 10B is an information processing apparatus that is used to receive desired data when operated by a user. The transmission device 20B is an information processing device for transmitting (providing) data desired by the user of the user terminal 10B to the user terminal 10B via the network.
 データ提供システム100Bでは、動画像データは、複数の断片(以下、「コンテンツブロック」と呼ぶ。)の集合として取り扱われる。図6は、データ提供システム100Bにおける動画像データの例を示す図である。動画像データは、複数のコンテンツブロックに分けて構成され、コンテンツブロックの総数がコンテンツブロック数として保持される。コンテンツブロックは、動画像の再生に必要なデータが時系列に従って複数に分割されたものである。例えば、N分の動画像データは、0~1分、1~2分、・・N-1分~N分のN個のコンテンツブロックとして構成される。この場合、0~1分のコンテンツブロックがユーザ端末10Bに取得されることにより、ユーザ端末10Bは、それ以降のコンテンツブロックが受信されることなく、0~1分の動画像を再生することが可能となる。コンテンツブロックは、必ずしも上記のように1分きざみで構成される必要はなく、もっと短い単位でも、もっと長い単位でも構成できる。なお、コンテンツブロック数は、コンテンツヘッダに含まれても良い。以下の説明では、便宜的に、コンテンツブロックにナンバリングを行い、先頭から順に1~Nの数字を付して説明する(例:コンテンツブロック1,コンテンツブロックN)。 In the data providing system 100B, moving image data is handled as a set of a plurality of fragments (hereinafter referred to as “content blocks”). FIG. 6 is a diagram illustrating an example of moving image data in the data providing system 100B. The moving image data is divided into a plurality of content blocks, and the total number of content blocks is held as the number of content blocks. The content block is obtained by dividing data necessary for reproduction of a moving image into a plurality of pieces in time series. For example, N minutes of moving image data is configured as N content blocks of 0 to 1 minute, 1 to 2 minutes,... N−1 minutes to N minutes. In this case, when the content block of 0 to 1 minute is acquired by the user terminal 10B, the user terminal 10B can reproduce the moving image of 0 to 1 minute without receiving the subsequent content block. It becomes possible. The content block does not necessarily have to be configured in units of one minute as described above, and can be configured in a shorter unit or a longer unit. Note that the number of content blocks may be included in the content header. In the following description, for convenience, the content blocks are numbered and numbers 1 to N are assigned in order from the top (example: content block 1, content block N).
 また、データ提供システム100Bにおいては、ユーザ端末10Bは、一台の送信装置20Bから動画像データの全て(コンテンツブロックの全て)を受信するように構成されても良いし、複数台の送信装置20Bから分散的に動画像データのコンテンツブロックを受信するように構成されても良い。そして、ユーザ端末10Bは、受信された動画像データのコンテンツブロックを適宜再生し、また、最終的に一つの動画像データとして記録する。 In the data providing system 100B, the user terminal 10B may be configured to receive all of the moving image data (all of the content blocks) from one transmission device 20B, or a plurality of transmission devices 20B. May be configured to receive content blocks of moving image data in a distributed manner. Then, the user terminal 10B appropriately reproduces the content block of the received moving image data, and finally records it as one moving image data.
 ユーザ端末10Bと送信装置20Bとは、インターネット等のネットワークを用いて接続される。なお、ユーザ端末10Bと送信装置20Bとの間の通信形態はインターネットに限定される必要はなく、LANやWAN等、どのような通信形態を用いて構成されても良い。また、ユーザ端末10Bは、図5のネットワークに複数台接続されても良い。また、図5では送信装置20Bが複数台接続されているが、例えば図1のように、送信装置20Bが一台のみ接続されても良い。以下、データ提供システム100Bに含まれる各装置について説明する。 The user terminal 10B and the transmission device 20B are connected using a network such as the Internet. Note that the communication mode between the user terminal 10B and the transmission device 20B is not limited to the Internet, and any communication mode such as a LAN or WAN may be used. A plurality of user terminals 10B may be connected to the network of FIG. In FIG. 5, a plurality of transmission apparatuses 20B are connected, but only one transmission apparatus 20B may be connected as shown in FIG. Hereinafter, each device included in the data providing system 100B will be described.
 〈ユーザ端末〉
 図7は、ユーザ端末10Bの機能ブロック例を示す図である。ユーザ端末10Bは、レシーバ12Aに代えてレシーバ12Bを含む点で、ユーザ端末10Aと異なる。以下、ユーザ端末10Bについて、ユーザ端末10Aと異なる部分を説明する。
<User terminal>
FIG. 7 is a diagram illustrating an example of functional blocks of the user terminal 10B. The user terminal 10B is different from the user terminal 10A in that it includes a receiver 12B instead of the receiver 12A. Hereinafter, a part of the user terminal 10B different from the user terminal 10A will be described.
 〈〈レシーバ〉〉
 レシーバ12Bは、送受信部11を介して、送信装置20Bから動画像データのコンテンツブロックを受け取る。レシーバ12Bが記憶部13へコンテンツブロックを渡す方法は、特に限定される必要はない。一方、レシーバ12Bは、再生部14へコンテンツブロックを渡す際、流量制御を行う。このため、送受信部11によって受信されたあるコンテンツブロックが、レシーバ12Bによって記憶部13と再生部14とへ渡されるタイミングは、必ずしも一致しない。
<Receiver>
The receiver 12B receives a content block of moving image data from the transmission device 20B via the transmission / reception unit 11. The method by which the receiver 12B passes the content block to the storage unit 13 is not particularly limited. On the other hand, the receiver 12B performs flow rate control when delivering the content block to the playback unit 14. For this reason, the timing at which a certain content block received by the transmission / reception unit 11 is passed to the storage unit 13 and the reproduction unit 14 by the receiver 12B does not necessarily match.
 具体的には、レシーバ12Bは、再生部14における動画像の再生に合わせて、再生すべき動画像を含むコンテンツブロックを判断し、これを再生部14に渡す。例えば、コンテンツブロック1の再生が終了する前に、次のコンテンツブロック2の再生が開始されてしまうと、ユーザにとっては動画像の再生が飛んでしまうことになり問題となる。一方で、コンテンツブロック1の再生が終了してから暫くの間コンテンツブロック2の再生が開始されないと、ユーザにとっては動画像の再生が停止してしまうことになり問題となる。このような問題を解消すべく、流量制御が実施される。流量制御の処理の具体例は、フローチャートの説明の際に説明する。 Specifically, the receiver 12B determines a content block including a moving image to be reproduced in accordance with the reproduction of the moving image in the reproducing unit 14, and passes this to the reproducing unit 14. For example, if the reproduction of the next content block 2 is started before the reproduction of the content block 1 is finished, there will be a problem for the user because the reproduction of the moving image is skipped. On the other hand, if the reproduction of the content block 2 is not started for a while after the reproduction of the content block 1 is finished, the reproduction of the moving image is stopped for the user. In order to solve such a problem, flow control is performed. A specific example of the flow rate control process will be described when the flowchart is described.
 〈送信装置〉
 図8は、送信装置20Bの機能ブロック例を示す図である。送信装置20Bは、制御部22Aに代えて制御部22Bを含む点で、送信装置20Aと異なる。以下、送信装置20Bについて、送信装置20Aと異なる部分を説明する。
<Transmitter>
FIG. 8 is a diagram illustrating an example of functional blocks of the transmission device 20B. The transmission device 20B is different from the transmission device 20A in that it includes a control unit 22B instead of the control unit 22A. Hereinafter, the transmission device 20B will be described with respect to parts different from the transmission device 20A.
 〈〈制御部〉〉
 制御部22Bは、コンテンツブロックをユーザ端末10Bに送信する。記憶部23に記憶される動画像データが、既に複数のコンテンツブロックに分けてある場合には、制御部22Bは、記憶部23に記憶されたコンテンツブロックをユーザ端末10Bに送信するように構成される。また、記憶部23に記憶される動画像データが、複数のコンテンツブロックに分けられていない場合には、制御部22Bは、この動画像データをコンテンツブロックに分けて、ユーザ端末10Bに送信するように構成される。
<Control section>
The control unit 22B transmits the content block to the user terminal 10B. When the moving image data stored in the storage unit 23 is already divided into a plurality of content blocks, the control unit 22B is configured to transmit the content blocks stored in the storage unit 23 to the user terminal 10B. The When the moving image data stored in the storage unit 23 is not divided into a plurality of content blocks, the control unit 22B divides the moving image data into content blocks and transmits the content blocks to the user terminal 10B. Configured.
 〔動作例〕
 図9は、レシーバ12Bによる流量制御の具体例を示すフローチャートである。この流量制御は、図4のフローチャートのS104の処理において実行される。
[Operation example]
FIG. 9 is a flowchart showing a specific example of flow rate control by the receiver 12B. This flow control is executed in the process of S104 in the flowchart of FIG.
 流量制御が開始されると、レシーバ12Bは、まず現在時刻を開始時刻(TS)として取得する(S201)。次に、レシーバ12Bは、次に再生部14に渡すべきコンテンツブロックを取得し、このコンテンツブロックから再生開始時間(T1)を取得する(S202)。「次に再生部14に渡すべきコンテンツブロック」とは、まだ再生が開始されていなければ、コンテンツブロック1であるし、既に再生が開始されていれば、現在再生されているコンテンツブロックの次のコンテンツブロックである。なお、再生開始時間(T1)は、この動画像データの再生が開始されてから、このコンテンツブロックの再生が開始されるまでの経過時間を示す。 When the flow control is started, the receiver 12B first acquires the current time as the start time (TS) (S201). Next, the receiver 12B acquires a content block to be passed to the playback unit 14 next, and acquires a playback start time (T1) from the content block (S202). The “content block to be passed to the playback unit 14” is the content block 1 if playback has not started yet, and the next block of the content block currently played back if playback has already started. It is a content block. Note that the reproduction start time (T1) indicates an elapsed time from the start of reproduction of the moving image data to the start of reproduction of the content block.
 次に、レシーバ12Bは、現在時刻をT2として取得する(S203)。そして、レシーバ12Bは、T1,T2,TSを用いて、このコンテンツブロックを再生部14に渡すか否か判断する(S204)。図9では、レシーバ12Bは、経過時間(T2-TS)が、そのコンテンツブロックの再生開始時間(T1)を越えたか否かで判断する。経過時間が再生開始時間を越えていない場合(S205-NO)、レシーバ12Bは、S203以降の処理を繰り返す。一方、経過時間が再生開始時間を越えた場合(S205-YES)、レシーバ12Bは、このコンテンツブロックを再生部14に渡す(S206)。この場合、再生部14は、図4のフローチャートにおけるS105の処理を行う。即ち、再生部14は、レシーバ12Bから流量制御によって渡されたコンテンツブロックを用いて動画像の再生を行う。この場合、S104においてレシーバ12Bが実行する流量制御と、S105において再生部14が実行する再生処理とは、並行して実行される。 Next, the receiver 12B acquires the current time as T2 (S203). Then, the receiver 12B determines whether to pass this content block to the playback unit 14 using T1, T2, and TS (S204). In FIG. 9, the receiver 12B determines whether or not the elapsed time (T2-TS) has exceeded the playback start time (T1) of the content block. When the elapsed time does not exceed the reproduction start time (S205—NO), the receiver 12B repeats the processes after S203. On the other hand, when the elapsed time exceeds the playback start time (S205—YES), the receiver 12B passes this content block to the playback unit 14 (S206). In this case, the reproducing unit 14 performs the process of S105 in the flowchart of FIG. That is, the reproducing unit 14 reproduces a moving image using the content block passed from the receiver 12B by the flow rate control. In this case, the flow rate control performed by the receiver 12B in S104 and the regeneration process performed by the regeneration unit 14 in S105 are performed in parallel.
 次に、レシーバ12Bは、全てのコンテンツブロックを再生部14に渡したか否かを判断する(S207)。この判断は、どのように実装されても良い。例えば、予めレシーバ12Bがコンテンツブロック数を取得し、再生部14に渡したコンテンツブロックの数をカウントすることによって、実現されても良い。この場合、コンテンツブロック数を取得するための実装はどのように実現されても良い。例えば、コンテンツブロック数は、図6のようにコンテンツブロック1が受信される前に単体のデータとしてレシーバ12Bに受信されても良いし、コンテンツヘッダに含まれても良いし、コンテンツブロック1に含まれても良い。また、例えば、最後のコンテンツブロックに、該コンテンツブロックが最後のコンテンツブロックであることを示すフラグなどが含まれ、これをもってレシーバ12BがS207の判断を行うように構成されても良い。 Next, the receiver 12B determines whether or not all content blocks have been passed to the playback unit 14 (S207). This determination may be implemented in any way. For example, it may be realized by the receiver 12B acquiring the number of content blocks in advance and counting the number of content blocks passed to the playback unit 14. In this case, the implementation for acquiring the number of content blocks may be realized in any way. For example, the number of content blocks may be received by the receiver 12B as single data before the content block 1 is received as shown in FIG. 6, may be included in the content header, or included in the content block 1 It may be. Further, for example, the last content block may include a flag indicating that the content block is the last content block, and the receiver 12B may make the determination in S207 based on the flag.
 まだ再生部14に渡されていないコンテンツブロックが残っている場合(S207-NO)、レシーバ12BはS202以降の処理を行う。一方、全てのコンテンツブロックについて処理が終了した場合(S207-YES)、流量制御の処理は終了する。 If content blocks that have not yet been passed to the playback unit 14 remain (S207—NO), the receiver 12B performs the processing from S202 onward. On the other hand, when the processing is completed for all the content blocks (S207-YES), the flow rate control processing is completed.
 〔作用/効果〕
 データ提供システム100Bによれば、送信装置20Bとユーザ端末10Bとを接続するネットワークにおいて、動画像データが複数のコンテンツブロックに分けて転送される構成を実現することができる。このように、動画像データが複数のコンテンツブロックに分けて転送されることにより、いくつかのメリットを享受できる。
[Action / Effect]
According to the data providing system 100B, a configuration in which moving image data is divided into a plurality of content blocks and transferred in a network connecting the transmission device 20B and the user terminal 10B can be realized. In this way, moving image data is divided into a plurality of content blocks and transferred, so that several advantages can be enjoyed.
 まず、送信装置20Bからユーザ端末10Bへ転送する際に、転送が途中で失敗したとしても、動画像データの先頭から再送する必要が無く、失敗したコンテンツブロックを再送することで正常に転送ができる。このため、転送に失敗したときの再送信に必要な通信コストを削減することが可能となる。 First, when transferring from the transmitting device 20B to the user terminal 10B, even if the transfer fails in the middle, there is no need to retransmit the moving image data from the beginning, and normal transfer can be performed by retransmitting the failed content block. . For this reason, it becomes possible to reduce the communication cost required for retransmission when the transfer fails.
 また、同じ動画像データが複数の送信装置20Bによって保持される場合、それぞれの送信装置20Bから別々のコンテンツブロックをユーザ端末10Bに並行して送信することにより、高速な転送を実現することができる。図10は、このような処理(以下、「多重転送処理」と呼ぶ。)の具体例を示す図である。図10において、ユーザ端末10Bは、送信装置1からはコンテンツブロック1を、送信装置2からはコンテンツブロック2を、それぞれ並行して受信する。このような多重転送処理は、例えば、複数の送信装置20B及びユーザ端末10Bが、ピアツーピア型ネットワークを用いて接続されることにより実現できる。具体的には、Winnyの多重ダウンロード機能やSkeed Cast等の機能を用いることにより実現できるが、実際にどのような実装を採用するかは、データ提供システム100Bの設計者によって適宜決定されて良い。 When the same moving image data is held by a plurality of transmission devices 20B, high-speed transfer can be realized by transmitting different content blocks from the respective transmission devices 20B to the user terminal 10B in parallel. . FIG. 10 is a diagram showing a specific example of such processing (hereinafter referred to as “multiplex transfer processing”). In FIG. 10, the user terminal 10B receives the content block 1 from the transmission device 1 and the content block 2 from the transmission device 2 in parallel. Such multiplex transfer processing can be realized, for example, by connecting a plurality of transmission apparatuses 20B and user terminals 10B using a peer-to-peer network. Specifically, it can be realized by using a function such as Winny's multiple download function or Skew Cast, but what kind of implementation is actually used may be appropriately determined by the designer of the data providing system 100B.
 ところで、動画像データが複数のコンテンツブロックに分けて転送される場合、受信されたデータがすぐに再生部14に渡されると、再生部14における動画像の再生が正確に実行されない。これは、レシーバ12Bの説明で述べたとおりであるが、さらに多重転送処理が行われた場合には、受信されるコンテンツブロックの順番がばらばらになる可能性がある。このため、再生部14に渡されるコンテンツブロックの順番も、レシーバ12Bによって制御される必要がある。この場合は、各コンテンツブロックにはデータの順番を示すデータが付加され、レシーバ12Bはこのデータに基づいて、図9のS202における「次のコンテンツブロック」を判断する。このように構成されることにより、多重転送処理によるデータ転送の高速化と、再生部14による再生処理(記憶部13からのデータ読み出しを伴わない再生処理)とを実現させることが可能となる。 By the way, when moving image data is divided into a plurality of content blocks and transferred, if the received data is immediately transferred to the reproduction unit 14, reproduction of the moving image in the reproduction unit 14 is not accurately executed. This is as described in the description of the receiver 12B. However, when multiple transfer processing is further performed, there is a possibility that the order of the received content blocks varies. For this reason, the order of the content blocks passed to the reproduction unit 14 also needs to be controlled by the receiver 12B. In this case, data indicating the order of data is added to each content block, and the receiver 12B determines the “next content block” in S202 of FIG. 9 based on this data. With this configuration, it is possible to realize high-speed data transfer by multiple transfer processing and reproduction processing by the reproduction unit 14 (reproduction processing that does not involve reading data from the storage unit 13).
 〔ネットワーク構成について〕
 上述した内容と重複するが、念のためデータ提供システム100Bのネットワーク構成について改めて説明する。ユーザ端末10Bと送信装置20Bとは、クライアントサーバ型のネットワークを用いて接続されても良い。この場合、ユーザ端末10Bがクライアント、送信装置20Bがサーバの役割を果たす。
[Network configuration]
Although it overlaps with the content mentioned above, the network structure of the data provision system 100B is demonstrated anew just in case. The user terminal 10B and the transmission device 20B may be connected using a client server type network. In this case, the user terminal 10B serves as a client, and the transmission device 20B serves as a server.
 また、ユーザ端末10Bと送信装置20Bとは、ピアツーピア型ネットワークを用いて接続されても良い。この場合、ユーザ端末10Bは、ピアツーピア型ネットワークに接続される情報処理装置であり、特にユーザが操作することによって所望の動画像データを受信するために使用される情報処理装置である。また、送信装置20Bは、ユーザ端末10Bと同じピアツーピア型ネットワークに接続される情報処理装置であり、特に上記ユーザが所望する動画像データを送信(提供)するための情報処理装置である。なお、複数の情報処理装置が接続されたピアツーピア型ネットワーク内において、ユーザが受信することを所望する動画像データを、どの情報処理装置(送信装置20B)が有しているかをユーザ端末10Bが知る方法は、本発明におけるデータ提供システム100Bに適用されるピアツーピア型ネットワークの技術に応じて、どのような方法が採用されても良い。 Also, the user terminal 10B and the transmission device 20B may be connected using a peer-to-peer network. In this case, the user terminal 10B is an information processing apparatus connected to a peer-to-peer network, and is an information processing apparatus used to receive desired moving image data, particularly when operated by a user. The transmitting device 20B is an information processing device connected to the same peer-to-peer network as the user terminal 10B, and is an information processing device for transmitting (providing) moving image data desired by the user. The user terminal 10B knows which information processing device (transmitting device 20B) has moving image data that the user desires to receive in a peer-to-peer network to which a plurality of information processing devices are connected. As the method, any method may be adopted depending on the technology of the peer-to-peer network applied to the data providing system 100B according to the present invention.
 〔変形例〕
 〈データの暗号化について〉
 送信装置20Bからユーザ端末10Bに送信される動画像データは、暗号化されたデータであっても良い。この場合、動画像データは、データブロック毎に暗号化されるように構成されても良いし、さらに小さい単位で暗号化されても良い。この場合、ユーザ端末10Bにおけるレシーバ12Bは、暗号化された一つのデータ単位(例えばデータブロック)を受信し、それについて復号化を実行するように構成される。即ち、レシーバ12Bは、送信装置20Bから送受信部11を介して受信された動画像データを復号化し、復号化された動画像データを記憶部13及び再生部14に渡す。このとき、レシーバ12Bは、記憶部13に対しては暗号化されたままの動画像データを渡し、再生部14に対しては復号化された動画像データを渡すように構成されても良い。また、レシーバ12Bは暗号化されたままのデータを再生部14に渡し、再生部14が復号化を行うことによって再生を実行するように構成されても良い。
[Modification]
<About data encryption>
The moving image data transmitted from the transmission device 20B to the user terminal 10B may be encrypted data. In this case, the moving image data may be configured to be encrypted for each data block, or may be encrypted in a smaller unit. In this case, the receiver 12B in the user terminal 10B is configured to receive one encrypted data unit (for example, a data block) and perform decryption on it. That is, the receiver 12B decodes the moving image data received from the transmission device 20B via the transmission / reception unit 11, and passes the decoded moving image data to the storage unit 13 and the reproduction unit 14. At this time, the receiver 12 </ b> B may be configured to pass the encrypted moving image data to the storage unit 13 and pass the decoded moving image data to the reproduction unit 14. Further, the receiver 12B may be configured to pass the encrypted data to the reproduction unit 14, and the reproduction unit 14 performs the reproduction by performing the decryption.
 動画像データ全体が一つの暗号化ファイルとして構成されてしまうと、全てを受信してからでないと再生を行うことができないが、このようにデータブロック毎やそれよりも小さい単位で暗号化されることにより、再生のタイミングを早めることが可能となる。 If the entire moving image data is configured as a single encrypted file, it can only be played after it has been received, but it is encrypted in units of data blocks or smaller units in this way. As a result, the playback timing can be advanced.
 このようにレシーバ12Bが復号化の処理は、例えば図9のS201の処理の前や図4のS101の処理の後に、処理対象となっているコンテンツブロックを復号化する処理として実行されても良い。 In this way, the decryption process by the receiver 12B may be executed as a process for decrypting the content block to be processed, for example, before the process of S201 in FIG. 9 or after the process of S101 in FIG. .
 [第三実施形態]
 〔システム構成〕
 次に、本発明におけるデータ提供システムの第三実施形態である、データ提供システム100Cの構成例について説明する。データ提供システム100Cでは、各動画像データは、ユーザ端末10Cにおける取扱いについて制御される。この制御は、「記憶部13に記録され、再生部14による再生処理は実行されない制御」、「記憶部13に記録はされず、再生部14による再生処理は実行される制御」、「記憶部13に記録され、再生部14による再生処理も実行される制御」のうちから一つ選択される。この制御は、動画像データに制御識別符号が付加され、レシーバ12Cがこの制御識別符号に基づいて判断を行うことにより実現される。なお、この制御識別符号は、どのような方法によって決定されても良い。例えば、送信装置20Cに動画像データを記憶させる際に、送信装置20Cの管理者が決定できるように構成されても良い。また、例えば、ユーザ端末10Cが送信装置20Cに対して制御識別符号を通知することにより、ユーザ端末10Cのユーザが適宜決定できるように構成されても良い。以下、データ提供システム100Cに含まれる各装置について説明する。
[Third embodiment]
〔System configuration〕
Next, a configuration example of a data providing system 100C, which is the third embodiment of the data providing system according to the present invention, will be described. In the data providing system 100C, each moving image data is controlled for handling in the user terminal 10C. This control is “control recorded in the storage unit 13 and reproduction processing by the reproduction unit 14 is not executed”, “control that is not recorded in the storage unit 13 and reproduction processing by the reproduction unit 14 is executed”, “storage unit 13 is selected from the “controls recorded in 13 and playback processing by the playback unit 14 is also executed”. This control is realized by adding a control identification code to the moving image data and making a determination based on the control identification code by the receiver 12C. This control identification code may be determined by any method. For example, when moving image data is stored in the transmission device 20C, an administrator of the transmission device 20C may be able to determine. Further, for example, the user terminal 10C may be configured to appropriately determine the user of the user terminal 10C by notifying the transmission apparatus 20C of the control identification code. Hereinafter, each device included in the data providing system 100C will be described.
 〈ユーザ端末〉
 ユーザ端末10Cは、レシーバ12Aに代えてレシーバ12Cを含む点で、ユーザ端末10Aと異なる。以下、ユーザ端末10Cについて、ユーザ端末10Aと異なる部分を説明する。
<User terminal>
The user terminal 10C is different from the user terminal 10A in that it includes a receiver 12C instead of the receiver 12A. Hereinafter, a part of the user terminal 10C different from the user terminal 10A will be described.
 〈〈レシーバ〉〉
 レシーバ12Cは、送受信部11を介して、送信装置20Bから動画像データを受け取る。レシーバ12Cは、動画像データについて制御識別符号を取得し、この制御識別符号に基づいて処理を行う。即ち、レシーバ12Cは、記憶部13に対し動画像データを渡すか否か、再生部14に対し動画像データを渡すか否か、制御識別符号に基づいて判断する。この処理の具体例については、フローチャートの説明の際に説明する。
<Receiver>
The receiver 12C receives moving image data from the transmission device 20B via the transmission / reception unit 11. The receiver 12C acquires a control identification code for the moving image data, and performs processing based on the control identification code. That is, the receiver 12 </ b> C determines whether to transfer moving image data to the storage unit 13 and whether to transfer moving image data to the playback unit 14 based on the control identification code. A specific example of this processing will be described when explaining the flowchart.
 〔動作例〕
 図11は、レシーバ12Cの動作例を示すフローチャートである。なお、図4のフローチャートと同じ処理については、同じ符号を付す。
[Operation example]
FIG. 11 is a flowchart illustrating an operation example of the receiver 12C. The same processes as those in the flowchart of FIG. 4 are denoted by the same reference numerals.
 まず、レシーバ12Cが、送受信部11を介して送信装置20Cに対し、動画像データの送信を要求する(S101)。送信装置20Cは、動画像データの要求を受けると、要求元であるユーザ端末10Cに対し、要求された動画像データの送信を開始する。このとき、一般的にプログレッシブダウンロードではHTTPを用いてデータの送受信が実施されるが、本発明のデータ提供システム100Cにおいては、HTTPが適用されても良いし、他のプロトコルが適用されても良い。 First, the receiver 12C requests the transmission apparatus 20C to transmit moving image data via the transmission / reception unit 11 (S101). When receiving the request for moving image data, the transmitting device 20C starts transmitting the requested moving image data to the user terminal 10C that is the request source. At this time, generally, in progressive download, data is transmitted and received using HTTP. However, in the data providing system 100C of the present invention, HTTP may be applied or another protocol may be applied. .
 次に、レシーバ12Cは、受信される動画像データについての制御識別符号を取得する(S111)。そして、レシーバ12Cは、取得された制御識別符号の内容に基づいてその後の処理を判断する。制御識別符号が記録のみを示す場合(S112-記録のみ)、レシーバ12Cは、記録部13へのデータ転送を開始し(S102)、記録部13は動画像データの記録を行う(S103)。この場合、再生部14へのデータ転送や再生部14による再生処理は行われない。 Next, the receiver 12C acquires a control identification code for the received moving image data (S111). Then, the receiver 12C determines subsequent processing based on the content of the acquired control identification code. When the control identification code indicates only recording (S112—only recording), the receiver 12C starts data transfer to the recording unit 13 (S102), and the recording unit 13 records moving image data (S103). In this case, data transfer to the playback unit 14 and playback processing by the playback unit 14 are not performed.
 制御識別符号が再生のみを示す場合(S112-再生のみ)、レシーバ12Cは、再生部14へのデータ転送を開始し(S104)、再生部14は動画像データの再生を行う(S105)。この場合、記録部13へのデータ転送や記録部13へのデータ書き込みは行われない。 When the control identification code indicates only reproduction (S112-reproduction only), the receiver 12C starts data transfer to the reproduction unit 14 (S104), and the reproduction unit 14 reproduces moving image data (S105). In this case, data transfer to the recording unit 13 and data writing to the recording unit 13 are not performed.
 制御識別符号が記録及び再生を示す場合(S112-記録及び再生)、レシーバ12Cは、記録部13へのデータ転送と(S102)、再生部14へのデータ転送とを行い(S104)、第一実施形態における処理と同様となる。 When the control identification code indicates recording and reproduction (S112—recording and reproduction), the receiver 12C performs data transfer to the recording unit 13 (S102) and data transfer to the reproduction unit 14 (S104). This is the same as the processing in the embodiment.
 〔作用/効果〕
 従来のプログレッシブダウンロードでは、再生される動画像データはユーザ端末の記憶装置に記録されることが前提となっていた。一方で、従来の技術にストリーミングという処理もあるが、ストリーミングでは、再生される動画像データはユーザ端末の記憶装置に記録されないことが前提となっていた。また、プログレッシブダウンロードとストリーミングとでは、まったく同じプロトコルでデータ転送をすることは困難である。しかしながら、データ提供システム100Cによれば、同じプロトコルによって送信装置20Cからユーザ端末10Cに動画像データを転送し、ユーザ端末10Cのレシーバ12Cによって、記録の有無や再生の有無を判断することが可能となる。即ち、記録の有無や再生の有無によって、送信装置20Cがユーザ端末10Cに動画像データを転送する処理を変更する必要がない。
[Action / Effect]
In the conventional progressive download, it is assumed that the moving image data to be reproduced is recorded in the storage device of the user terminal. On the other hand, although there is a process called streaming in the conventional technique, it is assumed that the moving image data to be reproduced is not recorded in the storage device of the user terminal. Also, it is difficult to transfer data using exactly the same protocol for progressive download and streaming. However, according to the data providing system 100C, it is possible to transfer moving image data from the transmission device 20C to the user terminal 10C using the same protocol, and to determine whether recording or reproduction is performed by the receiver 12C of the user terminal 10C. Become. That is, there is no need to change the process of transmitting moving image data to the user terminal 10C by the transmission device 20C depending on the presence or absence of recording or the presence or absence of reproduction.
 また、動画像データによっては、著作権の問題などから、ユーザ端末10Cに記録されないことが望まれるものもある。このような場合には、予め送信装置20Cに動画像データが蓄えられる際に、制御識別符号を「再生のみ」に設定することで、容易に著作権等に基づいた制御を行うことができる。 Also, some moving image data is desired not to be recorded in the user terminal 10C due to a copyright problem or the like. In such a case, when moving image data is stored in advance in the transmission apparatus 20C, the control identification code is set to “reproduction only”, so that control based on copyrights can be easily performed.
 また、ユーザ端末10Cのユーザにとっても、その時々の状況に応じて、再生を伴う記録なのか、再生を伴わない記録なのかを自由に制御できることにより、ユーザの便宜を図ることが可能となる。同様に、ユーザ端末10Cに備えられた記憶領域の容量によっては、記録を伴わない再生が望まれることもあり、このような要求に対しても適宜対応することが可能となる。 In addition, for the user of the user terminal 10C, it is possible to freely control whether the recording is accompanied by reproduction or the recording not accompanied by reproduction according to the circumstances of the occasion, so that the convenience of the user can be achieved. Similarly, depending on the capacity of the storage area provided in the user terminal 10C, reproduction without recording may be desired, and it is possible to appropriately respond to such a request.
 〔変形例〕
 上述した説明では、制御の種類として3種類を挙げたが、このうちいずれか二つの制御から選択されるように構成されても良いし、さらに他の制御も選択できるように構成されても良い。
[Modification]
In the above description, three types of control have been described. However, any two of these controls may be selected, or another control may be selected. .
 また、上述した説明では、制御識別符号に基づいた処理を第一実施形態に対して適用するモデルを説明したが、制御識別符号に基づいた処理は第二実施形態に対して適用されても良い。即ち、制御識別符号に基づいた処理及び流量制御の処理を行うようにデータ提供システムが構成されても良い。 Moreover, although the model which applies the process based on the control identification code to the first embodiment has been described in the above description, the process based on the control identification code may be applied to the second embodiment. . That is, the data providing system may be configured to perform processing based on the control identification code and flow control processing.
 また、第一実施形態や第二実施形態と同様に、動画像データが暗号化されるように構成され、レシーバ12Cが復号化を行うように構成されても良い。 Further, similarly to the first embodiment and the second embodiment, the moving image data may be configured to be encrypted, and the receiver 12C may be configured to perform the decryption.

Claims (12)

  1.  ネットワークを介して動画像および音声の少なくとも一方を示す動画像・音声データを受信する受信手段と、
     動画像・音声データを記憶する記憶手段と、
     動画像・音声データを再生する再生手段と、
     受信された動画像・音声データを、記憶手段及び再生手段に転送する制御手段と、を備え、
     前記記憶手段は、前記制御手段から転送された動画像・音声データを記憶し、
     前記再生手段は、前記制御手段から動画像・音声データを転送された場合に、前記記憶手段に記憶された動画像・音声データではなく、前記制御手段から転送された動画像・音声データを再生する
     ユーザ端末装置。
    Receiving means for receiving moving image / sound data indicating at least one of a moving image and sound via a network;
    Storage means for storing moving image / audio data;
    Playback means for playing back moving image / sound data;
    Control means for transferring the received moving image / sound data to the storage means and the reproduction means,
    The storage means stores moving image / sound data transferred from the control means,
    When the moving image / sound data is transferred from the control unit, the reproducing unit reproduces the moving image / sound data transferred from the control unit, not the moving image / sound data stored in the storage unit. User terminal device.
  2.  前記動画像・音声データは、複数のコンテンツブロックから構成され、
     前記制御手段は、前記再生手段には、各コンテンツブロックの再生されるタイミングに応じてコンテンツブロックを転送し、
     前記再生手段は、制御手段によって転送されたコンテンツブロックを再生することで動画像・音声データの再生を行う
     請求項1に記載のユーザ端末装置。
    The moving image / sound data is composed of a plurality of content blocks,
    The control means transfers the content block to the reproduction means according to the timing at which each content block is reproduced,
    The user terminal apparatus according to claim 1, wherein the reproduction unit reproduces moving image / audio data by reproducing the content block transferred by the control unit.
  3.  前記動画像・音声データは、記憶されるべきか否かを示す制御識別符号を含み、
     前記制御手段は、前記制御識別符号に基づいて、受信された動画像・音声データを前記記憶手段に転送するか判断し、判断結果に基づいて転送を行う
     請求項1又は2に記載のユーザ端末装置。
    The video / audio data includes a control identification code indicating whether or not to be stored,
    The user terminal according to claim 1, wherein the control unit determines whether to transfer the received moving image / sound data to the storage unit based on the control identification code, and performs transfer based on the determination result. apparatus.
  4.  前記動画像・音声データは、再生されるべきか否かを示す制御識別符号を含み、
     前記制御手段は、前記制御識別符号に基づいて、受信された動画像・音声データを前記再生手段に転送するか判断し、判断結果に基づいて転送を行う
     請求項1又は2に記載のユーザ端末装置。
    The video / audio data includes a control identification code indicating whether or not to be reproduced,
    The user terminal according to claim 1, wherein the control unit determines whether to transfer the received moving image / sound data to the reproduction unit based on the control identification code, and performs transfer based on the determination result. apparatus.
  5.  動画像および音声の少なくとも一方を示す動画像・音声データを記憶する記憶手段と、動画像・音声データを再生する再生手段を含む情報処理装置が、動画像・音声データをネットワークを介して受信するステップと、
     情報処理装置が、受信された動画像・音声データを記憶手段に転送する第一転送ステップと、
     情報処理装置が、受信された動画像・音声データを再生手段に転送する第二転送ステップと、
     情報処理装置が、前記記憶手段に転送された動画像・音声データを記憶するステップと、
     情報処理装置が、前記第二転送ステップが実行された場合は、前記記憶手段に記憶された動画像・音声データではなく、当該第二転送ステップで転送された動画像・音声データを、前記再生手段において再生する再生ステップと
     を含む動画像・音声データ受信方法。
    An information processing apparatus including a storage unit that stores moving image / sound data indicating at least one of a moving image and sound and a reproduction unit that reproduces the moving image / sound data receives the moving image / sound data via a network. Steps,
    A first transfer step in which the information processing apparatus transfers the received moving image / sound data to the storage means;
    A second transfer step in which the information processing apparatus transfers the received moving image / sound data to the reproduction means;
    An information processing device storing the moving image / audio data transferred to the storage means;
    When the second transfer step is executed, the information processing apparatus reproduces not the moving image / sound data stored in the storage unit but the moving image / sound data transferred in the second transferring step. A moving image / audio data receiving method comprising: a reproducing step of reproducing in the means.
  6.  前記動画像・音声データは、複数のコンテンツブロックから構成され、
     前記情報処理装置は、前記第二転送ステップにおいて、各コンテンツブロックの再生されるタイミングに応じてコンテンツブロックを転送し、
     前記情報処理装置は、前記再生ステップにおいて、転送されたコンテンツブロックを再生することで動画像・音声データの再生を行う
     請求項5に記載の動画像・音声データ受信方法。
    The moving image / sound data is composed of a plurality of content blocks,
    In the second transfer step, the information processing device transfers the content block according to the timing at which each content block is reproduced,
    The moving image / audio data receiving method according to claim 5, wherein the information processing apparatus reproduces moving image / audio data by reproducing the transferred content block in the reproduction step.
  7.  前記動画像・音声データは、記憶されるべきか否かを示す制御識別符号を含み、
     前記情報処理装置が、前記制御識別符号に基づいて、受信された動画像・音声データを前記記憶手段に転送するか判断するステップと、
     前記情報処理装置が、前記判断に基づいて転送を行うステップと、をさらに含む
     請求項5又は6に記載の動画像・音声データ受信方法。
    The video / audio data includes a control identification code indicating whether or not to be stored,
    Determining whether the information processing apparatus transfers the received moving image / sound data to the storage unit based on the control identification code;
    The moving image / audio data receiving method according to claim 5, further comprising: a step in which the information processing apparatus performs transfer based on the determination.
  8.  前記動画像・音声データは、再生されるべきか否かを示す制御識別符号を含み、
     前記情報処理装置は、前記制御識別符号に基づいて、受信された動画像・音声データを前記再生手段に転送するか判断するステップと、
     前記情報処理装置が、前記判断に基づいて転送を行うステップと、をさらに含む
     請求項5又は6に記載の動画像・音声データ受信方法。
    The video / audio data includes a control identification code indicating whether or not to be reproduced,
    The information processing apparatus, based on the control identification code, determining whether to transfer the received moving image / audio data to the reproduction means;
    The moving image / audio data receiving method according to claim 5, further comprising: a step in which the information processing apparatus performs transfer based on the determination.
  9.  情報処理装置を、
     ネットワークを介して動画像および音声の少なくとも一方を示す動画像・音声データを受信する受信手段と、
     動画像・音声データを記憶する記憶手段と、
     動画像・音声データを再生する再生手段と、
     受信された動画像・音声データを、記憶手段及び再生手段に転送する制御手段と
     を備え、
     前記記憶手段は、前記制御手段から転送された動画像・音声データを記憶し、
     前記再生手段は、前記制御手段から動画像・音声データを転送された場合に、前記記憶手段に記憶された動画像・音声データではなく、前記制御手段から転送された動画像・音声データを再生するユーザ端末装置
     として機能させるためのプログラム。
    Information processing device
    Receiving means for receiving moving image / sound data indicating at least one of a moving image and sound via a network;
    Storage means for storing moving image / audio data;
    Playback means for playing back moving image / sound data;
    Control means for transferring the received moving image / sound data to the storage means and the reproduction means,
    The storage means stores moving image / sound data transferred from the control means,
    When the moving image / sound data is transferred from the control unit, the reproducing unit reproduces the moving image / sound data transferred from the control unit, not the moving image / sound data stored in the storage unit. Program to function as a user terminal device.
  10.  前記動画像・音声データは、複数のコンテンツブロックから構成され、
     前記制御手段は、前記再生手段には、各コンテンツブロックの再生されるタイミングに応じてコンテンツブロックを転送し、
     前記再生手段は、制御手段によって転送されたコンテンツブロックを再生することで動画像・音声データの再生を行う
     請求項9に記載のプログラム。
    The moving image / sound data is composed of a plurality of content blocks,
    The control means transfers the content block to the reproduction means according to the timing at which each content block is reproduced,
    The program according to claim 9, wherein the reproduction unit reproduces the moving image / audio data by reproducing the content block transferred by the control unit.
  11.  前記動画像・音声データは、記憶されるべきか否かを示す制御識別符号を含み、
     前記制御手段は、前記制御識別符号に基づいて、受信された動画像・音声データを前記
    記憶手段に転送するか判断し、判断結果に基づいて転送を行う
     請求項9又は10に記載のプログラム。
    The video / audio data includes a control identification code indicating whether or not to be stored,
    The program according to claim 9 or 10, wherein the control unit determines whether to transfer the received moving image / sound data to the storage unit based on the control identification code, and performs transfer based on the determination result.
  12.  前記動画像・音声データは、再生されるべきか否かを示す制御識別符号を含み、
     前記制御手段は、前記制御識別符号に基づいて、受信された動画像・音声データを前記再生手段に転送するか判断し、判断結果に基づいて転送を行う
     請求項9又は10に記載のプログラム。
    The video / audio data includes a control identification code indicating whether or not to be reproduced,
    The program according to claim 9 or 10, wherein the control unit determines whether to transfer the received moving image / audio data to the reproduction unit based on the control identification code, and performs transfer based on the determination result.
PCT/JP2008/002904 2008-10-14 2008-10-14 User terminal WO2010044124A1 (en)

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