WO2015174451A1 - Terminal device, control method, and program - Google Patents

Terminal device, control method, and program Download PDF

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Publication number
WO2015174451A1
WO2015174451A1 PCT/JP2015/063758 JP2015063758W WO2015174451A1 WO 2015174451 A1 WO2015174451 A1 WO 2015174451A1 JP 2015063758 W JP2015063758 W JP 2015063758W WO 2015174451 A1 WO2015174451 A1 WO 2015174451A1
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WO
WIPO (PCT)
Prior art keywords
image data
moving image
video
resolution
data
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Application number
PCT/JP2015/063758
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French (fr)
Japanese (ja)
Inventor
寛明 齊藤
佐藤　聡
秀和 安達
柴田　智明
Original Assignee
株式会社ドワンゴ
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Publication of WO2015174451A1 publication Critical patent/WO2015174451A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2387—Stream processing in response to a playback request from an end-user, e.g. for trick-play
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording

Definitions

  • the present invention relates to a terminal device, a control method, and a program.
  • This application claims priority on May 16, 2014 based on Japanese Patent Application No. 2014-102771 for which it applied to Japan, and uses the content here.
  • a streaming-type moving image distribution system in which a terminal device acquires and reproduces a moving image via a network from a distribution server that distributes the moving image (see, for example, Patent Document 1).
  • a terminal device acquires and reproduces a moving image via a network from a distribution server that distributes the moving image (see, for example, Patent Document 1).
  • a moving image is viewed via a network, depending on the acquisition status of the moving image data, the portion of the moving image that the user wants to view may not be acquired because it may not be viewed. Therefore, by using a range request of HTTP (HypertextperTransfer Protocol), a moving image is pinpointed and reproduced for each part to be viewed.
  • HTTP HypertextperTransfer Protocol
  • RangeRequest range request
  • the present invention has been made in view of such circumstances.
  • One of the objects of the present invention is to provide a terminal device, a control method, and a program that can comfortably view a moving image via a network.
  • a terminal device includes: an acquisition unit that acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data; A playback control unit that plays back the moving image based on the low resolution image data and causes the display unit to display the image based on the low resolution image data.
  • the reproduction control unit performs fast forward reproduction or rewind reproduction of an image based on the low-resolution image data. And you may display on the said display part.
  • the acquisition unit may acquire the low-resolution image data of frame images at predetermined time intervals when a moving image based on the moving image data is reproduced.
  • the acquisition unit may acquire the low-resolution image data of a frame image for each key frame of the moving image data.
  • the reproduction control unit is an image based on the low-resolution image data corresponding to the moving image data of the portion to be reproduced. May be reproduced and displayed on the display unit.
  • a terminal device includes: an acquisition unit that acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data; If the acquisition unit does not acquire the moving image data of the portion to be reproduced, the low resolution image data corresponding to the moving image data of the portion to be reproduced is displayed.
  • a reproduction control unit that reproduces an image based on the image and displays the image on the display unit.
  • a control method acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data from a moving image distribution device, and a moving image based on the moving image data is obtained. Reproducing and displaying on the display unit, and displaying the image based on the low-resolution image data on the display unit by performing fast forward reproduction or rewind reproduction.
  • a control method acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data from a moving image distribution device, and a moving image based on the moving image data is obtained.
  • the moving image data of the portion to be reproduced is not acquired, the image based on the low resolution image data corresponding to the moving image data of the portion to be reproduced is reproduced and displayed. To be displayed on the part.
  • a program acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data from a moving image distribution device, and reproduces the moving image based on the moving image data
  • the image is displayed on the display unit, and an image based on the low-resolution image data is displayed in the display unit by fast-forward reproduction or rewind reproduction.
  • a program acquires moving image data of a moving image and low-resolution image data having a resolution lower than the resolution of the moving image data from a moving image distribution device, and reproduces and displays the moving image based on the moving image data
  • the moving image data of the portion to be reproduced is not acquired, the image based on the low resolution image data corresponding to the moving image data of the portion to be reproduced is reproduced and displayed on the display portion , Let the computer do that.
  • FIG. 1 is a schematic block diagram showing an example of the configuration of a moving image distribution system 1 according to the first embodiment of the present invention.
  • the moving image distribution system 1 includes a moving image distribution server 100 and a plurality of terminal devices 200.
  • the video distribution server 100 and each of the plurality of terminal devices 200 are connected via the network 5.
  • the network 5 is an Internet network, a public line network, or the like.
  • the video distribution server 100 and each of the plurality of terminal devices 200 may be connected using either the Internet network or the public line network.
  • the video distribution server 100 and each of the plurality of terminal devices 200 may be connected using a combination of an Internet network and a public line network.
  • the moving image distribution server 100 distributes a moving image to the requesting terminal device 200 in response to a distribution request from the terminal device 200.
  • This distribution is performed by streaming distribution, for example.
  • the terminal device 200 is connected to the moving image distribution server 100 via the network 5 and receives moving image data distributed from the moving image distribution server 100. Then, the terminal device 200 reproduces and displays the received moving image data.
  • the terminal device 200 is a terminal device having a function capable of communicating with various servers through a communication line such as the Internet.
  • a computer Personal Computer
  • a mobile terminal a mobile phone, a smartphone, an information terminal device, or the like
  • a game machine or the like
  • the moving image distribution server 100 When the moving image distribution server 100 distributes a moving image to the terminal device 200, in addition to distributing the moving image data of the moving image, the moving image distribution server 100 generates thumbnail image data (low resolution) by performing a process of reducing the resolution of the moving image data. Image data).
  • thumbnail image data low resolution
  • Image data image data
  • the thumbnail image data may be thumbnail image data obtained by reducing the frame image at a predetermined time interval (for example, every second) when moving image data is reproduced.
  • FIG. 2 is a diagram showing moving image data and thumbnail image data at intervals of one second in the moving image data.
  • the horizontal axis is time (t).
  • FIG. 2 shows frame images (rectangular blocks in FIG. 2) of moving image data (reference A in FIG. 2) and thumbnail image data (reference B in FIG. 2) arranged along the time axis.
  • the time (t) is indicated by time codes (hour: minute: second: frame) t1, t2, t3 of the moving image data.
  • the time code t1 indicates (00: 00: 00: 00: 00).
  • the time code t2 indicates (00: 00: 01: 05).
  • the time code t3 indicates (00: 00: 02: 05).
  • the interval between the time codes t1 and t2 and the interval between the time codes t2 and t3 are 1 second (symbol I in FIG. 2).
  • the moving image distribution server 100 generates thumbnail image data by thinning out the number of frames of the moving image data and reducing the resolution of the remaining frames.
  • the moving image distribution server 100 distributes the thumbnail image data.
  • the moving image distribution server 100 distributes thumbnail image data (fs1, fs2, fs3,...) Of frames every one second interval when reproducing moving image data.
  • only one frame image at the head position is left every one second interval, and the other frame images are thinned out.
  • the thumbnail image data is not limited to being generated from frame images at predetermined time intervals.
  • the thumbnail image data may be image data obtained by reducing the frame image for each key frame of the moving image data to a low resolution.
  • the terminal device 200 receives moving image data and thumbnail image data distributed from the moving image distribution server 100. Since the thumbnail image data has a smaller amount of information than the moving image data, the terminal device 200 can complete the reception of the thumbnail image data in a shorter time than the moving image data. Accordingly, the terminal device 200 reproduces and displays the received moving image data, and when the moving image data of the corresponding part is not acquired when performing fast forward reproduction or rewind reproduction, the thumbnail image data is used instead of the moving image data. Can be displayed by fast-forward playback or rewind playback.
  • FIG. 3 is a schematic block diagram illustrating an example of the configuration of the terminal device 200 according to the first embodiment.
  • the terminal device 200 includes a touch panel 210, a communication unit 220, a data storage unit 230, and a control unit 240.
  • the touch panel 210 includes a display unit 211 and an input unit 212.
  • the display unit 211 includes a liquid crystal display that displays information such as images and characters, an organic EL (Electro-Luminescence) display, and the like.
  • the input unit 212 is provided so as to overlap the display screen of the display unit 211, and accepts an operation input from the user by detecting contact on the display screen of the display unit 211.
  • the input unit 212 includes a touch sensor that detects contact using a change in capacitance, a change in pressure, a change in electrical resistance, and the like.
  • the communication unit 220 communicates with an external device via the network 5.
  • the communication unit 220 is connected to the video distribution server 100 via the network 5 and transmits / receives data to / from the video distribution server 100.
  • the data storage unit 230 stores various data such as moving image data.
  • the data storage unit 230 includes a moving image data storage unit 231 and a thumbnail data storage unit 232.
  • the moving image data storage unit 231 stores moving image data distributed from the moving image distribution server 100 and acquired by the terminal device 200.
  • the thumbnail data storage unit 232 stores thumbnail image data distributed from the moving image distribution server 100 and acquired by the terminal device 200.
  • the moving image data and the thumbnail image data are associated with each moving image and each frame in the moving image, and are stored in the moving image data storage unit 231 and the thumbnail data storage unit 232, respectively.
  • the control unit 240 includes an input information acquisition unit 241, a reproduction control unit 242, a data acquisition unit 243, and a display control unit 244.
  • the input information acquisition unit 241 acquires input information indicating the operation input accepted by the input unit 212. For example, the input information acquisition unit 241 determines whether the operation input from the user is reproduction of a moving image, fast forward, rewind, stop, or the like based on the acquired input information. Furthermore, the input information acquisition unit 241 supplies instruction information related to the moving image playback function to the playback control unit 242 according to the determination result.
  • the playback control unit 242 controls playback of moving images, fast forward playback, rewind playback, stop playback, and the like based on the instruction information supplied from the input information acquisition unit 241. For example, when instruction information for instructing reproduction of a moving image is supplied from the input information acquisition unit 241, the reproduction control unit 242 makes a distribution request for the moving image to the video distribution server 100 via the data acquisition unit 243. . Then, the reproduction control unit 242 reads out the acquired moving image data from the moving image data storage unit 231 and reproduces it according to the acquisition of the moving image data of the moving image for which the distribution request has been made.
  • the playback control unit 242 reads the acquired moving image data from the moving image data storage unit 231 and performs fast-forward playback or rewind playback. .
  • the playback control unit 242 reads the acquired thumbnail image data from the thumbnail data storage unit 232 and performs fast-forward playback or rewind playback when the moving image data of the portion to be fast-forward playback or rewind playback is not acquired.
  • the playback control unit 242 causes the display unit 211 to display the moving image data or thumbnail image data that has been played back, fast forwarded, or rewound.
  • the data acquisition unit 243 acquires moving image data and thumbnail image data from the moving image distribution server 100 via the communication unit 220. For example, when there is a moving image distribution request from the reproduction control unit 242, the data acquisition unit 243 transmits the moving image distribution request to the moving image distribution server 100 via the communication unit 220. Further, the data acquisition unit 243 acquires the moving image data and thumbnail image data transmitted from the moving image distribution server 100 in response to the distribution request via the communication unit 220. Then, the data acquisition unit 243 stores the acquired moving image data and thumbnail image data in the moving image data storage unit 231 and the thumbnail data storage unit 232, respectively. The moving image data and thumbnail image data acquired by the data acquisition unit 243 are associated with each moving image and for each frame in the moving image.
  • the display control unit 244 controls the moving image and information displayed on the display unit 211.
  • the display control unit 244 causes the display unit 211 to display moving image data or thumbnail image data that has been played back, fast forward played back, or rewound played back by the playback control unit 242.
  • the display control unit 244 causes the display unit 211 to display an icon such as an operation button for accepting a user operation input to the touch panel 210.
  • FIG. 4 is a flowchart showing an example of fast-forward playback or rewind playback processing of a moving image according to the first embodiment.
  • the terminal device 200 makes a moving image distribution request to the moving image distribution server 100 and acquires the moving image data from the moving image distribution server 100 while playing the acquired moving image data. It will be explained on the assumption that there is. Further, it is assumed that the terminal device 200 has completed the acquisition of thumbnail image data of the moving image being played back.
  • the playback control unit 242 determines whether a fast forward or rewind operation has been performed (step S110). When the instruction information for instructing fast-forwarding or rewinding of the moving image is not supplied from the input information acquiring unit 241, the reproduction control unit 242 determines that the fast-forwarding or rewinding operation has not been performed (Step S ⁇ b> 110: No). In this case, the reproduction control unit 242 continues to reproduce the moving image data without performing fast forward reproduction or rewind reproduction processing.
  • the playback control unit 242 determines that the fast-forwarding or rewinding operation has been performed (Step S110: Yes).
  • the reproduction control unit 242 refers to the moving image data storage unit 231 and determines whether or not moving image data of a portion for performing fast forward reproduction or rewind reproduction has been acquired (step S120).
  • step S120 A case will be described in which it is determined in step S120 that the moving image data of the portion for performing fast forward playback or rewind playback has been acquired (step S120: Yes).
  • the reproduction control unit 242 reads the moving image data from the moving image data storage unit 231 and performs fast forward reproduction or rewind reproduction (step S130).
  • step S120 a case will be described in which it is determined in step S120 that the moving image data of the portion for performing fast forward playback or rewind playback has not been acquired (step S120: No).
  • the playback control unit 242 reads out thumbnail image data corresponding to the moving image data of the portion to be fast-forwarded or rewound from the thumbnail data storage unit 232, and performs fast-forward playback or rewind playback (step S140).
  • the playback control unit 242 determines whether or not the moving image data or thumbnail image data being fast-forwarded or rewound has reached the final frame (step S150).
  • the last frame in the case of fast-forward playback means the last frame of moving image data or thumbnail image data.
  • the last frame in the case of rewind playback means the first frame of moving image data or thumbnail image data.
  • the playback control unit 242 proceeds to the process of step S170 when the moving image data or thumbnail image data being fast-forwarded or rewound has not reached the final frame (step S150: No). On the other hand, when the moving image data or thumbnail image data being fast-forwarded or rewound has reached the final frame (step S150: Yes), the playback control unit 242 pauses playback at that frame (step S160). ), The process proceeds to step S170.
  • the reproduction control unit 242 determines whether or not the fast forward or rewind operation is continued (step S170).
  • the reproduction control unit 242 determines that the fast-forwarding or rewinding operation is continued when the instruction information for instructing the fast-forwarding or rewinding of the moving image is supplied from the input information acquisition unit 241 (step S170: Yes). .
  • the reproduction control unit 242 returns the process to step S120 and continues the fast forward reproduction or rewind reproduction process.
  • Step S170 No.
  • the playback control unit 242 ends the fast-forward playback or rewind playback processing, and plays back the moving image data.
  • the playback control unit 242 pauses if the thumbnail image data has not been acquired, and waits for the acquisition of thumbnail image data. Alternatively, fast-forward playback or rewind playback of thumbnail image data may be resumed.
  • FIG. 5 is an image diagram showing a display example of fast-forward playback of a moving image according to the first embodiment.
  • the display screen indicated by reference numeral (a) is an image of a playback screen for moving image data. A movie with the original resolution of the movie data is displayed. In this state, a case where a fast forward operation is performed and fast forward reproduction is started will be described. When the moving image data of the portion to be fast-forwarded is not acquired, the thumbnail image data is fast-forwarded.
  • the display screen indicated by reference numeral (b) is an image of a fast-forward playback screen for thumbnail image data. As a fast-forward playback screen, a playback screen for thumbnail image data having a resolution lower than that of the playback screen for moving image data indicated by symbol (a) is displayed. When the fast-forward operation is completed, the playback screen becomes a playback screen for moving image data on which a moving image having the original resolution of the moving image data is displayed, as in the image of the display screen indicated by reference numeral (c).
  • the terminal device 200 includes the data acquisition unit 243 (acquisition unit) and the playback control unit 242, and is connected to the video distribution server 100 (video distribution device) that distributes video. 5 is connected.
  • the data acquisition unit 243 acquires moving image data of moving images and thumbnail image data (low resolution image data) obtained by reducing the moving image data from the moving image distribution server 100.
  • the reproduction control unit 242 reproduces the moving image data and causes the display unit 211 to display the thumbnail image data and causes the display unit 211 to display the thumbnail image data by performing the fast forward reproduction or the rewind reproduction.
  • the playback control unit 242 displays the thumbnail image data on the display unit 211 by performing fast forward playback or rewind playback.
  • the terminal device 200 can use the thumbnail image data instead of the video data even when the acquisition of the video data from the video distribution server 100 has not caught up during the fast forward playback or rewind playback of the video. Can be played forward or backward. Therefore, even if a low-resolution moving image is displayed, it is possible to fast-forward or rewind the moving image while confirming the reproduction position. Therefore, it is possible to avoid the situation where it becomes impossible to fast forward or rewind the moving image. Therefore, according to the first embodiment, it is possible to comfortably view a moving image via a network.
  • the terminal device 200 when the moving image data of the portion to be fast-forwarded or rewound is not acquired, the terminal device 200 performs fast-forward playback or rewind playback instead of the moving image data.
  • fast-forward playback or rewind playback instead of the moving image data.
  • the terminal device 200 uses the thumbnail image data for fast forward playback or rewind playback regardless of whether or not the moving image data of the portion for fast forward playback or rewind playback has not been acquired. May be.
  • the playback control unit 242 performs the fast-forward playback or rewind playback of the thumbnail image data even when the data acquisition unit 243 has already acquired the moving image data of the portion for which fast-forward playback or rewind playback is performed. May be displayed. Thereby, the processing load at the time of fast forward reproduction or rewind reproduction can be reduced. For this reason, the processing capability required in the terminal device 200 can be reduced, leading to cost reduction of the terminal device 200. In addition, since the power required for the processing during the fast forward playback or the rewind playback can be reduced, the battery driving time of the terminal device 200 can be extended.
  • the data acquisition unit 243 may acquire thumbnail image data of frame images at predetermined time intervals when moving image data is reproduced. As a result, the number of frame images to be reproduced at the time of fast forward reproduction or rewind reproduction is thinned, so that the processing load at the time of fast forward reproduction or rewind reproduction can be reduced.
  • the data acquisition unit 243 may acquire thumbnail image data of a frame image for each key frame of moving image data. In this way, if thumbnail image data for each key frame is used, it is possible to suppress a reduction in the image quality of a moving image during fast forward playback and rewind playback, compared to simply using thumbnail image data at a predetermined time interval.
  • the reproduction control unit 242 reproduces the acquired moving image data and reproduces an unacquired portion of the moving image data.
  • a specific example of the case where the unacquired portion of the moving image data is reproduced is a case where the communication environment deteriorates during the reproduction of the moving image and the acquisition of the moving image data cannot be caught up.
  • Another specific example is a case where a seek operation is performed by the user during the reproduction of a moving image, and moving image data of a portion to be reproduced after the seek operation is not acquired.
  • the seek operation refers to an operation of skipping a playback portion of a moving image, unlike fast forward playback and rewind playback. For example, by moving the position of a slider (knob) on a seek bar that represents the playback location of the moving image, the moving image can be played from any location.
  • FIG. 6 is a flowchart illustrating an example of a moving image playback process according to the second embodiment.
  • the reproduction control unit 242 determines whether or not an operation for reproducing a moving image has been performed (step S210). When the instruction information for instructing the reproduction of the moving image is not supplied from the input information acquisition unit 241, the reproduction control unit 242 determines that the operation for reproducing the moving image is not performed (step S210: No). In this case, the reproduction control unit 242 waits for an operation to reproduce a moving image without performing the reproduction process.
  • the reproduction control unit 242 determines that an operation for reproducing the moving image has been performed (step S ⁇ b> 210: Yes). In this case, the reproduction control unit 242 makes a moving image distribution request to the moving image distribution server 100 via the data acquisition unit 243.
  • the data acquisition unit 243 starts acquiring moving image data from the moving image distribution server 100.
  • the data acquisition unit 243 acquires thumbnail image data from the moving image distribution server 100.
  • the reproduction control unit 242 refers to the moving image data storage unit 231 and determines whether or not moving image data of a portion to be reproduced has been acquired (step S220). The case where it is determined in step S220 that the moving image data of the part to be reproduced has been acquired (step S220: Yes) will be described. In this case, the reproduction control unit 242 reads out and reproduces the moving image data from the moving image data storage unit 231 (step S230).
  • step S220 determines that the moving image data of the portion for performing fast forward playback or rewind playback has not been acquired (step S220: No).
  • the reproduction control unit 242 reads out thumbnail image data corresponding to the moving image data of the portion to be reproduced from the thumbnail data storage unit 232 and reproduces it (step S240).
  • the playback control unit 242 determines whether or not the moving image data or thumbnail image data being played has reached the final frame (step S250).
  • the last frame in the case of reproduction means the last frame of the moving image.
  • step S250: No When the moving image data or thumbnail image data being reproduced has not reached the final frame (step S250: No), the reproduction control unit 242 proceeds to the process of step S270. On the other hand, when the moving image data or thumbnail image data being reproduced has reached the final frame (step S250: Yes), the reproduction control unit 242 pauses reproduction at that frame (step S260), and then proceeds to step S270. Proceed to processing.
  • the playback control unit 242 determines whether or not an operation for stopping the playback of the moving image has been performed (step S270).
  • the reproduction control unit 242 determines that an operation for stopping the reproduction of the moving image has not been performed (step S ⁇ b> 270: No). In this case, the reproduction control unit 242 returns the process to step S220 and continues the moving image reproduction process.
  • the reproduction control unit 242 determines that an operation for stopping the reproduction of the moving image has been performed (step S ⁇ b> 270: Yes). In this case, the reproduction control unit 242 ends the reproduction process.
  • the reproduction control unit 242 pauses the thumbnail image data if it has not been acquired in the process of reproducing the thumbnail image data in step S240, waits for the acquisition of the thumbnail image data, and then deletes the thumbnail image data. Playback may be resumed.
  • the terminal device 200 includes the data acquisition unit 243 (acquisition unit) and the reproduction control unit 242, and is connected to the video distribution server 100 (video distribution device) that distributes the video. 5 is connected.
  • the data acquisition unit 243 acquires from the moving image distribution server 100 moving image data of moving images and thumbnail image data (low resolution image data) obtained by reducing the moving image data to low resolution.
  • the reproduction control unit 242 reproduces thumbnail image data corresponding to the unacquired moving image data and causes the display unit 211 to display the thumbnail image data.
  • the terminal device 200 reproduces the thumbnail image data instead of the moving image data even when the acquisition of the moving image data from the moving image distribution server 100 does not catch up when reproducing the moving image. Can do. Therefore, the terminal device 200 can reproduce a moving image even when a low-resolution moving image is displayed. Therefore, it can be avoided that the moving image cannot be reproduced. Therefore, according to the second embodiment, it is possible to comfortably view a moving image via a network.
  • the first and second embodiments of the present invention have been described in detail with reference to the drawings.
  • the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention. It is.
  • the functions described in the first and second embodiments described above can be arbitrarily combined.
  • control unit 240 shown in FIG. 3 may be realized by dedicated hardware, or configured by a memory and a CPU (central processing unit), and a program for realizing the functions of the above-described units.
  • the function may be realized by loading it into a memory and executing it.
  • a program for realizing part or all of the functions of the control unit 240 in FIG. 3 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. As a result, the processing of each unit described above may be performed.
  • the “computer system” here includes an OS and hardware such as peripheral devices.
  • a program for realizing a part or all of the functions of the control unit 240 in FIG. For example, when playing back a moving image, the terminal device 100 downloads the program from the moving image distribution server 100 and installs it to be read into the computer system of the terminal device 100 and executes the processing of each unit described above. May be.
  • a program for realizing a part or all of the functions of the control unit 240 in FIG. 3 may be provided from a server device other than the moving image distribution server 100 (for example, a server device that provides various applications).
  • the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
  • the “computer-readable recording medium” includes a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in the computer system. Further, the “computer-readable recording medium” is a volatile memory (RAM) inside a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. Including those holding programs for a certain period of time.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in the computer system.
  • the present invention may be applied to a terminal device, a control method, and a program.

Abstract

This terminal device is provided with an acquisition unit and a playback control unit. The acquisition unit acquires, from a video distribution device, video data for a video and low-resolution video data for said video, said low-resolution video data having a lower resolution than the other video data. The playback control unit plays back video based on the aforementioned video data and makes a display unit display said video. When fast-forwarding or rewinding, the playback control unit plays back video based on the low-resolution video data and makes the aforementioned display unit display said video.

Description

端末装置、制御方法、およびプログラムTerminal device, control method, and program
　本発明は、端末装置、制御方法、およびプログラムに関する。
　本願は、２０１４年５月１６日に、日本に出願された特願２０１４－１０２７７１号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a terminal device, a control method, and a program.
This application claims priority on May 16, 2014 based on Japanese Patent Application No. 2014-102771 for which it applied to Japan, and uses the content here.
　動画を配信する配信サーバから端末装置がネットワーク経由で動画を取得して再生するストリーミング方式の動画配信システムがある（例えば、特許文献１参照）。ネットワーク経由で動画を視聴する場合には、動画データの取得状況によっては、ユーザが視聴したい部分の動画が未取得であることから視聴できないことがある。そのため、ＨＴＴＰ（Hypertext Transfer Protocol）のＲａｎｇｅＲｅｑｕｅｓｔ（レンジリクエスト）の利用により、視聴したい部分ごとに動画をピンポイントで取得して再生することが行われている。 There is a streaming-type moving image distribution system in which a terminal device acquires and reproduces a moving image via a network from a distribution server that distributes the moving image (see, for example, Patent Document 1). When a moving image is viewed via a network, depending on the acquisition status of the moving image data, the portion of the moving image that the user wants to view may not be acquired because it may not be viewed. Therefore, by using a range request of HTTP (HypertextperTransfer Protocol), a moving image is pinpointed and reproduced for each part to be viewed.
日本国特許第５２６７１６５号公報Japanese Patent No. 5267165
　しかしながら、ＲａｎｇｅＲｅｑｕｅｓｔ（レンジリクエスト）を利用して視聴したい部分ごとに動画を取得する方法であっても、動画の早送り再生又は巻戻し再生では動画データの取得が追い付かず表示が困難な場合があり、快適な視聴ができない場合があった。 However, even if it is a method of acquiring a video for each part that you want to view using RangeRequest (range request), video data acquisition may not catch up with fast-forward playback or rewind playback, and display may be difficult. There were cases where comfortable viewing was not possible.
　本発明は、このような事情に鑑みてなされた。本発明の目的の一つは、ネットワーク経由による動画の視聴を快適に行える端末装置、制御方法、およびプログラムを提供することである。 The present invention has been made in view of such circumstances. One of the objects of the present invention is to provide a terminal device, a control method, and a program that can comfortably view a moving image via a network.
　本発明の一態様に係る端末装置は、動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得する取得部と、前記動画データに基づく動画を再生して表示部に表示させるとともに、前記低解像度画像データに基づく画像を早送り再生又は巻戻し再生して前記表示部に表示させる再生制御部と、を備える。 A terminal device according to an aspect of the present invention includes: an acquisition unit that acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data; A playback control unit that plays back the moving image based on the low resolution image data and causes the display unit to display the image based on the low resolution image data.
　上記端末装置において、前記再生制御部は、早送り再生又は巻戻し再生を行う部分の前記動画データを前記取得部が取得していない場合、前記低解像度画像データに基づく画像を早送り再生又は巻戻し再生して前記表示部に表示させてもよい。 In the terminal device, when the acquisition unit has not acquired the moving image data of a portion that performs fast forward reproduction or rewind reproduction, the reproduction control unit performs fast forward reproduction or rewind reproduction of an image based on the low-resolution image data. And you may display on the said display part.
　上記端末装置において、前記取得部は、前記動画データに基づく動画を再生したときの所定の時間間隔ごとのフレーム画像の前記低解像度画像データを取得してもよい。 In the terminal device, the acquisition unit may acquire the low-resolution image data of frame images at predetermined time intervals when a moving image based on the moving image data is reproduced.
　上記端末装置において、前記取得部は、前記動画データのキーフレームごとのフレーム画像の前記低解像度画像データを取得してもよい。 In the terminal device, the acquisition unit may acquire the low-resolution image data of a frame image for each key frame of the moving image data.
　上記端末装置において、前記再生制御部は、再生を行う部分の前記動画データを前記取得部が取得していない場合、前記再生を行う部分の前記動画データに対応する前記低解像度画像データに基づく画像を再生して前記表示部に表示させてもよい。 In the terminal device, when the acquisition unit has not acquired the moving image data of the portion to be reproduced, the reproduction control unit is an image based on the low-resolution image data corresponding to the moving image data of the portion to be reproduced. May be reproduced and displayed on the display unit.
　本発明の一態様に係る端末装置は、動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得する取得部と、前記動画データに基づく動画を再生して表示部に表示させるとともに、再生を行う部分の前記動画データを前記取得部が取得していない場合、前記再生を行う部分の前記動画データに対応する前記低解像度画像データに基づく画像を再生して前記表示部に表示させる再生制御部と、を備える。 A terminal device according to an aspect of the present invention includes: an acquisition unit that acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data; If the acquisition unit does not acquire the moving image data of the portion to be reproduced, the low resolution image data corresponding to the moving image data of the portion to be reproduced is displayed. A reproduction control unit that reproduces an image based on the image and displays the image on the display unit.
　本発明の一態様に係る制御方法は、動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得し、前記動画データに基づく動画を再生して表示部に表示させ、前記低解像度画像データに基づく画像を早送り再生又は巻戻し再生して前記表示部に表示させる、ことを含む。 A control method according to an aspect of the present invention acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data from a moving image distribution device, and a moving image based on the moving image data is obtained. Reproducing and displaying on the display unit, and displaying the image based on the low-resolution image data on the display unit by performing fast forward reproduction or rewind reproduction.
　本発明の一態様に係る制御方法は、動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得し、前記動画データに基づく動画を再生して表示部に表示させ、再生を行う部分の前記動画データを取得していない場合に前記再生を行う部分の前記動画データに対応する前記低解像度画像データに基づく画像を再生して前記表示部に表示させる、ことを含む。 A control method according to an aspect of the present invention acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data from a moving image distribution device, and a moving image based on the moving image data is obtained. When the moving image data of the portion to be reproduced is not acquired, the image based on the low resolution image data corresponding to the moving image data of the portion to be reproduced is reproduced and displayed. To be displayed on the part.
　本発明の一態様に係るプログラムは、動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得し、前記動画データに基づく動画を再生して表示部に表示させ、前記低解像度画像データに基づく画像を早送り再生又は巻戻し再生して前記表示部に表示させる、ことをコンピュータに実行させる。 A program according to an aspect of the present invention acquires moving image data of a moving image and low-resolution image data of the moving image having a resolution lower than the resolution of the moving image data from a moving image distribution device, and reproduces the moving image based on the moving image data The image is displayed on the display unit, and an image based on the low-resolution image data is displayed in the display unit by fast-forward reproduction or rewind reproduction.
　本発明の一態様に係るプログラムは、動画の動画データと前記動画データの解像度よりも低い解像度を有する低解像度画像データとを動画配信装置から取得し、前記動画データに基づく動画を再生して表示部に表示させ、再生を行う部分の前記動画データを取得していない場合、前記再生を行う部分の前記動画データに対応する前記低解像度画像データに基づく画像を再生して前記表示部に表示させる、ことをコンピュータに実行させる。 A program according to an aspect of the present invention acquires moving image data of a moving image and low-resolution image data having a resolution lower than the resolution of the moving image data from a moving image distribution device, and reproduces and displays the moving image based on the moving image data When the moving image data of the portion to be reproduced is not acquired, the image based on the low resolution image data corresponding to the moving image data of the portion to be reproduced is reproduced and displayed on the display portion , Let the computer do that.
　本発明の実施形態によれば、ネットワーク経由による動画の視聴を快適に行うことができる。 According to the embodiment of the present invention, it is possible to comfortably view a moving image via a network.
第１の実施形態による動画配信システムの構成を示す概略ブロック図である。It is a schematic block diagram which shows the structure of the moving image delivery system by 1st Embodiment. 第１の実施形態による動画データとサムネイル画像データとを示す図である。It is a figure which shows the moving image data and thumbnail image data by 1st Embodiment. 第１の実施形態による端末装置の構成を示す概略ブロック図である。It is a schematic block diagram which shows the structure of the terminal device by 1st Embodiment. 第１の実施形態による動画の早送り再生又は巻戻し再生の処理の一例を示すフローチャートである。It is a flowchart which shows an example of the process of the fast forward reproduction | regeneration of a moving image or the rewind reproduction | regeneration by 1st Embodiment. 第１の実施形態による動画の早送り再生の表示例を示す図である。It is a figure which shows the example of a display of the fast-forward reproduction | regeneration of the moving image by 1st Embodiment. 第２の実施形態による動画の再生処理の一例を示すフローチャートである。It is a flowchart which shows an example of the reproduction | regeneration processing of the moving image by 2nd Embodiment.
　以下、図面を参照して、本発明の実施の形態について説明する。
＜第１の実施形態＞
　図１は、この発明の第１の実施形態による動画配信システム１の構成の一例を示す概略ブロック図である。動画配信システム１は、動画配信サーバ１００と、複数の端末装置２００とを備える。動画配信サーバ１００と複数の端末装置２００各々とはネットワーク５を介して接続されている。このネットワーク５は、インターネット網や公衆回線網等である。動画配信サーバ１００と複数の端末装置２００各々とは、インターネット網および公衆回線網のいずれか一方を用いて接続される場合もある。動画配信サーバ１００と複数の端末装置２００各々とは、インターネット網と公衆回線網との組み合わせを用いて接続される場合もある。 Embodiments of the present invention will be described below with reference to the drawings.
<First Embodiment>
FIG. 1 is a schematic block diagram showing an example of the configuration of a moving image distribution system 1 according to the first embodiment of the present invention. The moving image distribution system 1 includes a moving image distribution server 100 and a plurality of terminal devices 200. The video distribution server 100 and each of the plurality of terminal devices 200 are connected via the network 5. The network 5 is an Internet network, a public line network, or the like. The video distribution server 100 and each of the plurality of terminal devices 200 may be connected using either the Internet network or the public line network. The video distribution server 100 and each of the plurality of terminal devices 200 may be connected using a combination of an Internet network and a public line network.
　図１に示す例において、動画配信サーバ１００は、端末装置２００からの配信要求に応じて、動画を要求元の端末装置２００へ配信する。この配信は、例えば、ストリーミング配信によって行われる。端末装置２００は、ネットワーク５を介して動画配信サーバ１００に接続し、動画配信サーバ１００から配信される動画データを受信する。そして、端末装置２００は、受信した動画データを再生して表示する。例えば、端末装置２００は、インターネット等の通信回線を介して各種サーバ等と通信可能な機能を有する端末装置である。端末装置２００として、コンピュータ（Ｐｅｒｓｏｎａｌ　Ｃｏｍｐｕｔｅｒ）、モバイル端末（携帯電話、スマートフォン、情報端末装置等）、ゲーム機等を適用してもよい。 In the example shown in FIG. 1, the moving image distribution server 100 distributes a moving image to the requesting terminal device 200 in response to a distribution request from the terminal device 200. This distribution is performed by streaming distribution, for example. The terminal device 200 is connected to the moving image distribution server 100 via the network 5 and receives moving image data distributed from the moving image distribution server 100. Then, the terminal device 200 reproduces and displays the received moving image data. For example, the terminal device 200 is a terminal device having a function capable of communicating with various servers through a communication line such as the Internet. As the terminal device 200, a computer (Personal Computer), a mobile terminal (a mobile phone, a smartphone, an information terminal device, or the like), a game machine, or the like may be applied.
　動画配信サーバ１００は、動画を端末装置２００へ配信する場合、その動画の動画データを配信することに加えて、その動画データの解像度を低下させる処理を行うことにより生成したサムネイル画像データ（低解像度画像データ）を配信する。動画データとサムネイル画像データとの両方を配信する理由は、端末装置２００が例えば早送り再生又は巻戻し再生を行うときに動画データの取得が追い付かない場合に、端末装置２００がその動画データの代わりにサムネイル画像データを再生して表示可能とするためである。 When the moving image distribution server 100 distributes a moving image to the terminal device 200, in addition to distributing the moving image data of the moving image, the moving image distribution server 100 generates thumbnail image data (low resolution) by performing a process of reducing the resolution of the moving image data. Image data). The reason why both the moving image data and the thumbnail image data are distributed is that, if the terminal device 200 cannot catch up with the moving image data when the terminal device 200 performs fast-forward playback or rewind playback, for example, the terminal device 200 replaces the moving image data. This is because the thumbnail image data can be reproduced and displayed.
　例えば、サムネイル画像データは、動画データを再生したときの所定の時間間隔（例えば、１秒間隔）ごとのフレーム画像を低解像度にしたサムネイル画像のデータであってもよい。
　図２は、動画データと、動画データのうち１秒間隔ごとのサムネイル画像データとを示す図である。図２に示す例において横軸は時間（ｔ）である。図２は、動画データ（図２における符号Ａ）とサムネイル画像データ（図２における符号Ｂ）とのそれぞれのフレーム画像（図２における長方形のブロック）を時間軸に並べて表している。時間（ｔ）は、動画データのタイムコード（時：分：秒：フレーム）ｔ１、ｔ２、ｔ３で示している。タイムコードｔ１は、（００：００：００：０５）を示す。タイムコードｔ２は、（００：００：０１：０５）を示す。タイムコードｔ３は、（００：００：０２：０５）を示す。タイムコードｔ１とｔ２との間隔およびタイムコードｔ２とｔ３との間隔が１秒（図２における符号Ｉ）である。動画配信サーバ１００は、動画データのフレーム数を間引きして、且つ残りのフレームの解像度を低下させる処理を行ってサムネイル画像データを生成する。動画配信サーバ１００は、そのサムネイル画像データを配信する。図２に示す例では、動画配信サーバ１００は、動画データを再生したときの１秒間隔ごとのフレームのサムネイル画像データ（ｆｓ１、ｆｓ２、ｆｓ３、・・・）を配信する。図２に示す例では、１秒間隔ごとに先頭の位置する一つのフレーム画像のみを残し、他のフレーム画像を間引いている。 For example, the thumbnail image data may be thumbnail image data obtained by reducing the frame image at a predetermined time interval (for example, every second) when moving image data is reproduced.
FIG. 2 is a diagram showing moving image data and thumbnail image data at intervals of one second in the moving image data. In the example shown in FIG. 2, the horizontal axis is time (t). FIG. 2 shows frame images (rectangular blocks in FIG. 2) of moving image data (reference A in FIG. 2) and thumbnail image data (reference B in FIG. 2) arranged along the time axis. The time (t) is indicated by time codes (hour: minute: second: frame) t1, t2, t3 of the moving image data. The time code t1 indicates (00: 00: 00: 00). The time code t2 indicates (00: 00: 01: 05). The time code t3 indicates (00: 00: 02: 05). The interval between the time codes t1 and t2 and the interval between the time codes t2 and t3 are 1 second (symbol I in FIG. 2). The moving image distribution server 100 generates thumbnail image data by thinning out the number of frames of the moving image data and reducing the resolution of the remaining frames. The moving image distribution server 100 distributes the thumbnail image data. In the example illustrated in FIG. 2, the moving image distribution server 100 distributes thumbnail image data (fs1, fs2, fs3,...) Of frames every one second interval when reproducing moving image data. In the example shown in FIG. 2, only one frame image at the head position is left every one second interval, and the other frame images are thinned out.
　サムネイル画像データは、所定の時間間隔ごとのフレーム画像から生成することに限られない。例えば、サムネイル画像データは、動画データのキーフレームごとのフレーム画像を低解像度にした画像のデータであってもよい。 The thumbnail image data is not limited to being generated from frame images at predetermined time intervals. For example, the thumbnail image data may be image data obtained by reducing the frame image for each key frame of the moving image data to a low resolution.
　端末装置２００は、動画配信サーバ１００から配信される動画データとサムネイル画像データとを受信する。サムネイル画像データは動画データよりも情報量が少ないため、端末装置２００は、サムネイル画像データの受信を動画データよりも短時間で完了することができる。従って、端末装置２００は、受信した動画データを再生して表示するとともに、早送り再生又は巻戻し再生を行う際に該当部分の動画データを未取得の場合には、動画データの代わりにサムネイル画像データを早送り再生又は巻戻し再生して表示することができる。 The terminal device 200 receives moving image data and thumbnail image data distributed from the moving image distribution server 100. Since the thumbnail image data has a smaller amount of information than the moving image data, the terminal device 200 can complete the reception of the thumbnail image data in a shorter time than the moving image data. Accordingly, the terminal device 200 reproduces and displays the received moving image data, and when the moving image data of the corresponding part is not acquired when performing fast forward reproduction or rewind reproduction, the thumbnail image data is used instead of the moving image data. Can be displayed by fast-forward playback or rewind playback.
　以下、図３を参照して、端末装置２００の構成について詳しく説明する。
　図３は、第１の実施形態による端末装置２００の構成の一例を示す概略ブロック図である。
　端末装置２００は、タッチパネル２１０と、通信部２２０と、データ記憶部２３０と、制御部２４０と、を備えている。 Hereinafter, the configuration of the terminal device 200 will be described in detail with reference to FIG.
FIG. 3 is a schematic block diagram illustrating an example of the configuration of the terminal device 200 according to the first embodiment.
The terminal device 200 includes a touch panel 210, a communication unit 220, a data storage unit 230, and a control unit 240.
　タッチパネル２１０は、表示部２１１と、入力部２１２とを備えている。表示部２１１は、画像や文字等の情報を表示する液晶ディスプレイや有機ＥＬ（Electro-Luminescence）ディスプレイ等を備えている。入力部２１２は、表示部２１１の表示画面に重ねて設けられており、表示部２１１の表示画面上における接触を検知することにより、ユーザからの操作入力を受け付ける。例えば、入力部２１２は、静電容量の変化、圧力の変化、電気抵抗の変化などを利用して接触を検出するタッチセンサを備えている。 The touch panel 210 includes a display unit 211 and an input unit 212. The display unit 211 includes a liquid crystal display that displays information such as images and characters, an organic EL (Electro-Luminescence) display, and the like. The input unit 212 is provided so as to overlap the display screen of the display unit 211, and accepts an operation input from the user by detecting contact on the display screen of the display unit 211. For example, the input unit 212 includes a touch sensor that detects contact using a change in capacitance, a change in pressure, a change in electrical resistance, and the like.
　通信部２２０は、外部機器とネットワーク５を介して通信する。例えば、通信部２２０は、動画配信サーバ１００とネットワーク５を介して接続し、動画配信サーバ１００とデータの送受信を行う。 The communication unit 220 communicates with an external device via the network 5. For example, the communication unit 220 is connected to the video distribution server 100 via the network 5 and transmits / receives data to / from the video distribution server 100.
　データ記憶部２３０は、動画データなどの各種データを記憶する。例えば、データ記憶部２３０は、動画データ記憶部２３１と、サムネイルデータ記憶部２３２と、を備えている。動画データ記憶部２３１は、動画配信サーバ１００から配信されて端末装置２００が取得した動画データを記憶する。サムネイルデータ記憶部２３２は、動画配信サーバ１００から配信されて端末装置２００が取得したサムネイル画像データを記憶する。ここで、動画データとサムネイル画像データとは、動画ごと及び動画の中のフレームごとに関連付けられて、動画データ記憶部２３１とサムネイルデータ記憶部２３２とにそれぞれ記憶される。 The data storage unit 230 stores various data such as moving image data. For example, the data storage unit 230 includes a moving image data storage unit 231 and a thumbnail data storage unit 232. The moving image data storage unit 231 stores moving image data distributed from the moving image distribution server 100 and acquired by the terminal device 200. The thumbnail data storage unit 232 stores thumbnail image data distributed from the moving image distribution server 100 and acquired by the terminal device 200. Here, the moving image data and the thumbnail image data are associated with each moving image and each frame in the moving image, and are stored in the moving image data storage unit 231 and the thumbnail data storage unit 232, respectively.
　制御部２４０は、入力情報取得部２４１と、再生制御部２４２と、データ取得部２４３と、表示制御部２４４と、を備えている。
　入力情報取得部２４１は、入力部２１２が受け付けた操作入力を示す入力情報を取得する。例えば、入力情報取得部２４１は、取得した入力情報に基づいて、ユーザからの操作入力が動画の再生、早送り、巻戻し、停止、等のいずれであるかを判定する。さらに、入力情報取得部２４１は、判定結果に応じて動画の再生機能に関する指示情報を再生制御部２４２に供給する。 The control unit 240 includes an input information acquisition unit 241, a reproduction control unit 242, a data acquisition unit 243, and a display control unit 244.
The input information acquisition unit 241 acquires input information indicating the operation input accepted by the input unit 212. For example, the input information acquisition unit 241 determines whether the operation input from the user is reproduction of a moving image, fast forward, rewind, stop, or the like based on the acquired input information. Furthermore, the input information acquisition unit 241 supplies instruction information related to the moving image playback function to the playback control unit 242 according to the determination result.
　再生制御部２４２は、入力情報取得部２４１から供給される指示情報に基づいて、動画の再生、早送り再生、巻戻し再生、再生の停止、等を制御する。例えば、再生制御部２４２は、動画の再生を指示する指示情報が入力情報取得部２４１から供給された場合、データ取得部２４３を介して、その動画の配信要求を動画配信サーバ１００に対して行う。そして、再生制御部２４２は、配信要求を行った動画の動画データの取得に応じて、取得済みの動画データを動画データ記憶部２３１から読み出して再生する。 The playback control unit 242 controls playback of moving images, fast forward playback, rewind playback, stop playback, and the like based on the instruction information supplied from the input information acquisition unit 241. For example, when instruction information for instructing reproduction of a moving image is supplied from the input information acquisition unit 241, the reproduction control unit 242 makes a distribution request for the moving image to the video distribution server 100 via the data acquisition unit 243. . Then, the reproduction control unit 242 reads out the acquired moving image data from the moving image data storage unit 231 and reproduces it according to the acquisition of the moving image data of the moving image for which the distribution request has been made.
　動画の早送り又は巻戻しを指示する指示情報が入力情報取得部２４１から供給された場合について説明する。この場合、再生制御部２４２は、早送り再生又は巻戻し再生を行う部分の動画データが取得済みの場合には、取得済みの動画データを動画データ記憶部２３１から読み出して早送り再生又は巻戻し再生する。一方、再生制御部２４２は、早送り再生又は巻戻し再生を行う部分の動画データが未取得の場合には、取得済みのサムネイル画像データをサムネイルデータ記憶部２３２から読み出して早送り再生又は巻戻し再生する。
　再生制御部２４２は、再生、早送り再生、又は巻戻し再生した動画データ又はサムネイル画像データを、表示制御部２４４を介して表示部２１１に表示させる。 A case where instruction information for instructing fast-forwarding or rewinding of a moving image is supplied from the input information acquisition unit 241 will be described. In this case, when the moving image data of the part to be fast-forwarded or rewound is already acquired, the playback control unit 242 reads the acquired moving image data from the moving image data storage unit 231 and performs fast-forward playback or rewind playback. . On the other hand, the playback control unit 242 reads the acquired thumbnail image data from the thumbnail data storage unit 232 and performs fast-forward playback or rewind playback when the moving image data of the portion to be fast-forward playback or rewind playback is not acquired. .
The playback control unit 242 causes the display unit 211 to display the moving image data or thumbnail image data that has been played back, fast forwarded, or rewound.
　データ取得部２４３は、通信部２２０を介して、動画配信サーバ１００から動画データ及びサムネイル画像データを取得する。例えば、データ取得部２４３は、再生制御部２４２から動画の配信要求があった場合、その動画の配信要求を、通信部２２０を介して動画配信サーバ１００に送信する。また、データ取得部２４３は、上記配信要求に応じて動画配信サーバ１００から送信される動画データ及びサムネイル画像データを、通信部２２０を介して取得する。そして、データ取得部２４３は、取得した動画データとサムネイル画像データとを、動画データ記憶部２３１とサムネイルデータ記憶部２３２とのそれぞれに記憶させる。データ取得部２４３が取得する動画データとサムネイル画像データとは、動画ごと及び動画の中のフレームごとに関連付けられている。 The data acquisition unit 243 acquires moving image data and thumbnail image data from the moving image distribution server 100 via the communication unit 220. For example, when there is a moving image distribution request from the reproduction control unit 242, the data acquisition unit 243 transmits the moving image distribution request to the moving image distribution server 100 via the communication unit 220. Further, the data acquisition unit 243 acquires the moving image data and thumbnail image data transmitted from the moving image distribution server 100 in response to the distribution request via the communication unit 220. Then, the data acquisition unit 243 stores the acquired moving image data and thumbnail image data in the moving image data storage unit 231 and the thumbnail data storage unit 232, respectively. The moving image data and thumbnail image data acquired by the data acquisition unit 243 are associated with each moving image and for each frame in the moving image.
　表示制御部２４４は、表示部２１１に表示させる動画及び情報を制御する。例えば、表示制御部２４４は、再生制御部２４２が再生、早送り再生、又は巻戻し再生した動画データ又はサムネイル画像データを表示部２１１に表示させる。また、表示制御部２４４は、タッチパネル２１０に対するユーザの操作入力を受け付けるための操作ボタンなどのアイコンを表示部２１１に表示させる。 The display control unit 244 controls the moving image and information displayed on the display unit 211. For example, the display control unit 244 causes the display unit 211 to display moving image data or thumbnail image data that has been played back, fast forward played back, or rewound played back by the playback control unit 242. In addition, the display control unit 244 causes the display unit 211 to display an icon such as an operation button for accepting a user operation input to the touch panel 210.
　次に、第１の実施形態による端末装置２００が実行する動画の早送り再生又は巻戻し再生の処理の動作を説明する。
　図４は、第１の実施形態による動画の早送り再生又は巻戻し再生の処理の一例を示すフローチャートである。以下の処理では、端末装置２００が動画配信サーバ１００に対して動画の配信要求を行い、動画配信サーバ１００から動画データを取得しながら、取得済みの動画データを再生している再生中の状態であることを前提として説明する。また、端末装置２００は、再生中の動画のサムネイル画像データの取得を完了していることを前提とする。 Next, the operation of the fast forward playback or rewind playback processing of the moving image executed by the terminal device 200 according to the first embodiment will be described.
FIG. 4 is a flowchart showing an example of fast-forward playback or rewind playback processing of a moving image according to the first embodiment. In the following processing, the terminal device 200 makes a moving image distribution request to the moving image distribution server 100 and acquires the moving image data from the moving image distribution server 100 while playing the acquired moving image data. It will be explained on the assumption that there is. Further, it is assumed that the terminal device 200 has completed the acquisition of thumbnail image data of the moving image being played back.
　再生制御部２４２は、早送り又は巻戻しの操作がされたか否かを判定する（ステップＳ１１０）。再生制御部２４２は、動画の早送り又は巻戻しを指示する指示情報が入力情報取得部２４１から供給されない場合、早送り又は巻戻しの操作がされていないと判定する（ステップＳ１１０：Ｎｏ）。この場合、再生制御部２４２は、早送り再生又は巻戻し再生の処理を行なわずに、動画データの再生を継続する。 The playback control unit 242 determines whether a fast forward or rewind operation has been performed (step S110). When the instruction information for instructing fast-forwarding or rewinding of the moving image is not supplied from the input information acquiring unit 241, the reproduction control unit 242 determines that the fast-forwarding or rewinding operation has not been performed (Step S <b> 110: No). In this case, the reproduction control unit 242 continues to reproduce the moving image data without performing fast forward reproduction or rewind reproduction processing.
　一方、再生制御部２４２は、動画の早送り又は巻戻しを指示する指示情報が入力情報取得部２４１から供給された場合、早送り又は巻戻しの操作がされたと判定する（ステップＳ１１０：Ｙｅｓ）。この場合、再生制御部２４２は、動画データ記憶部２３１を参照して、早送り再生又は巻戻し再生を行う部分の動画データが取得済みであるか否かを判定する（ステップＳ１２０）。 On the other hand, when the instruction information for instructing the fast-forwarding or rewinding of the moving image is supplied from the input information acquiring unit 241, the playback control unit 242 determines that the fast-forwarding or rewinding operation has been performed (Step S110: Yes). In this case, the reproduction control unit 242 refers to the moving image data storage unit 231 and determines whether or not moving image data of a portion for performing fast forward reproduction or rewind reproduction has been acquired (step S120).
　ステップＳ１２０において、早送り再生又は巻戻し再生を行う部分の動画データが取得済みであると判定された場合（ステップＳ１２０：Ｙｅｓ）について説明する。この場合、再生制御部２４２は、動画データを動画データ記憶部２３１から読み出して早送り再生又は巻戻し再生する（ステップＳ１３０）。 A case will be described in which it is determined in step S120 that the moving image data of the portion for performing fast forward playback or rewind playback has been acquired (step S120: Yes). In this case, the reproduction control unit 242 reads the moving image data from the moving image data storage unit 231 and performs fast forward reproduction or rewind reproduction (step S130).
　一方、ステップＳ１２０において、早送り再生又は巻戻し再生を行う部分の動画データが未取得であると判定された場合（ステップＳ１２０：Ｎｏ）について説明する。この場合、再生制御部２４２は、早送り再生又は巻戻し再生を行う部分の動画データに対応するサムネイル画像データを、サムネイルデータ記憶部２３２から読み出して早送り再生又は巻戻し再生する（ステップＳ１４０）。 On the other hand, a case will be described in which it is determined in step S120 that the moving image data of the portion for performing fast forward playback or rewind playback has not been acquired (step S120: No). In this case, the playback control unit 242 reads out thumbnail image data corresponding to the moving image data of the portion to be fast-forwarded or rewound from the thumbnail data storage unit 232, and performs fast-forward playback or rewind playback (step S140).
　次に、再生制御部２４２は、早送り再生又は巻戻し再生している動画データ又はサムネイル画像データが最終フレームに到達したか否かを判定する（ステップＳ１５０）。早送り再生の場合の最終フレームとは動画データ又はサムネイル画像データの最後のフレームを意味する。巻戻し再生の場合の最終フレームとは動画データ又はサムネイル画像データの最初のフレームを意味する。 Next, the playback control unit 242 determines whether or not the moving image data or thumbnail image data being fast-forwarded or rewound has reached the final frame (step S150). The last frame in the case of fast-forward playback means the last frame of moving image data or thumbnail image data. The last frame in the case of rewind playback means the first frame of moving image data or thumbnail image data.
　再生制御部２４２は、早送り再生又は巻戻し再生している動画データ又はサムネイル画像データが最終フレームに到達していない場合（ステップＳ１５０：Ｎｏ）、ステップＳ１７０の処理に進める。一方、再生制御部２４２は、早送り再生又は巻戻し再生している動画データ又はサムネイル画像データが最終フレームに到達した場合（ステップＳ１５０：Ｙｅｓ）、そのフレームで再生を一時停止させてから（ステップＳ１６０）、ステップＳ１７０の処理に進める。 The playback control unit 242 proceeds to the process of step S170 when the moving image data or thumbnail image data being fast-forwarded or rewound has not reached the final frame (step S150: No). On the other hand, when the moving image data or thumbnail image data being fast-forwarded or rewound has reached the final frame (step S150: Yes), the playback control unit 242 pauses playback at that frame (step S160). ), The process proceeds to step S170.
　次に、再生制御部２４２は、早送り又は巻戻しの操作が継続されているか否かを判定する（ステップＳ１７０）。再生制御部２４２は、動画の早送り又は巻戻しを指示する指示情報が入力情報取得部２４１から供給されている場合、早送り又は巻戻しの操作が継続されていると判定する（ステップＳ１７０：Ｙｅｓ）。この場合、再生制御部２４２は、ステップＳ１２０に処理を戻し、早送り再生又は巻戻し再生の処理を継続する。 Next, the reproduction control unit 242 determines whether or not the fast forward or rewind operation is continued (step S170). The reproduction control unit 242 determines that the fast-forwarding or rewinding operation is continued when the instruction information for instructing the fast-forwarding or rewinding of the moving image is supplied from the input information acquisition unit 241 (step S170: Yes). . In this case, the reproduction control unit 242 returns the process to step S120 and continues the fast forward reproduction or rewind reproduction process.
　一方、再生制御部２４２は、動画の早送り又は巻戻しを指示する指示情報が入力情報取得部２４１から供給されない場合、早送り又は巻戻しの操作が終了した（早送り又は巻戻しの操作が継続されていない）と判定する（ステップＳ１７０：Ｎｏ）。この場合、再生制御部２４２は、早送り再生又は巻戻し再生の処理を終了して、動画データの再生を行う。 On the other hand, when the instruction information for instructing fast-forwarding or rewinding of the moving image is not supplied from the input information acquiring unit 241, the playback control unit 242 has finished the fast-forwarding or rewinding operation (the fast-forwarding or rewinding operation is continued). (Step S170: No). In this case, the playback control unit 242 ends the fast-forward playback or rewind playback processing, and plays back the moving image data.
　上記説明では、端末装置２００が再生中の動画のサムネイル画像データの取得が完了していることを前提としている。しかしながら、サムネイル画像データの取得が完了していない場合も考えられる。その場合、再生制御部２４２は、ステップＳ１４０のサムネイル画像データを早送り再生又は巻戻し再生する処理において、サムネイル画像データが未取得の場合には一旦一時停止して、サムネイル画像データの取得を待ってからサムネイル画像データの早送り再生又は巻戻し再生を再開するようにしてもよい。 In the above description, it is assumed that the thumbnail image data of the moving image being played back by the terminal device 200 has been acquired. However, there may be a case where the acquisition of thumbnail image data is not completed. In that case, in the process of fast-forward playback or rewind playback of the thumbnail image data in step S140, the playback control unit 242 pauses if the thumbnail image data has not been acquired, and waits for the acquisition of thumbnail image data. Alternatively, fast-forward playback or rewind playback of thumbnail image data may be resumed.
　図５は、第１の実施形態による動画の早送り再生の表示例を示すイメージ図である。符号（ａ）に示す表示画面は、動画データの再生画面のイメージである。動画データ本来の解像度の動画が表示される。この状態において、早送り操作がされて、早送り再生が開始される場合について説明する。
　早送り再生される部分の動画データが未取得の場合、サムネイル画像データの早送り再生が行われる。符号（ｂ）に示す表示画面は、サムネイル画像データの早送り再生画面のイメージである。早送り再生画面として、符号（ａ）に示す動画データの再生画面よりも解像度が低いサムネイル画像データの再生画面が表示される。早送り操作が終了すると、再生画面は、符号（ｃ）示す表示画面のイメージように、動画データ本来の解像度の動画が表示される動画データの再生画面となる。 FIG. 5 is an image diagram showing a display example of fast-forward playback of a moving image according to the first embodiment. The display screen indicated by reference numeral (a) is an image of a playback screen for moving image data. A movie with the original resolution of the movie data is displayed. In this state, a case where a fast forward operation is performed and fast forward reproduction is started will be described.
When the moving image data of the portion to be fast-forwarded is not acquired, the thumbnail image data is fast-forwarded. The display screen indicated by reference numeral (b) is an image of a fast-forward playback screen for thumbnail image data. As a fast-forward playback screen, a playback screen for thumbnail image data having a resolution lower than that of the playback screen for moving image data indicated by symbol (a) is displayed. When the fast-forward operation is completed, the playback screen becomes a playback screen for moving image data on which a moving image having the original resolution of the moving image data is displayed, as in the image of the display screen indicated by reference numeral (c).
　以上説明したように、第１の実施形態による端末装置２００は、データ取得部２４３（取得部）と、再生制御部２４２とを備え、動画を配信する動画配信サーバ１００（動画配信装置）にネットワーク５を介して接続される。データ取得部２４３は、動画の動画データと、その動画データを低解像度にしたサムネイル画像データ（低解像度画像データ）とを動画配信サーバ１００から取得する。再生制御部２４２は、動画データを再生して表示部２１１に表示させるとともに、早送り再生又は巻戻し再生を行う際に、サムネイル画像データを早送り再生又は巻戻し再生して表示部２１１に表示させる。 As described above, the terminal device 200 according to the first embodiment includes the data acquisition unit 243 (acquisition unit) and the playback control unit 242, and is connected to the video distribution server 100 (video distribution device) that distributes video. 5 is connected. The data acquisition unit 243 acquires moving image data of moving images and thumbnail image data (low resolution image data) obtained by reducing the moving image data from the moving image distribution server 100. The reproduction control unit 242 reproduces the moving image data and causes the display unit 211 to display the thumbnail image data and causes the display unit 211 to display the thumbnail image data by performing the fast forward reproduction or the rewind reproduction.
　例えば、再生制御部２４２は、早送り再生又は巻戻し再生を行う部分の動画データをデータ取得部２４３が未取得の場合、サムネイル画像データを早送り再生又は巻戻し再生して表示部２１１に表示させる。 For example, when the data acquisition unit 243 has not acquired the moving image data for which fast forward playback or rewind playback is performed, the playback control unit 242 displays the thumbnail image data on the display unit 211 by performing fast forward playback or rewind playback.
　これにより、第１の実施形態による端末装置２００は、動画の早送り再生又は巻戻し再生の際に、動画配信サーバ１００からの動画データの取得が追い付いていなくとも、動画データの代わりにサムネイル画像データを早送り再生又は巻戻し再生することができる。よって、低解像度の動画表示になるとしても再生位置を確認しながら動画の早送り又は巻戻しを行うことができる。ゆえに、動画の早送り又は巻戻しできなくなってしまうことを回避することができる。したがって、第１の実施形態によれば、ネットワーク経由による動画の視聴を快適に行うことができる。 As a result, the terminal device 200 according to the first embodiment can use the thumbnail image data instead of the video data even when the acquisition of the video data from the video distribution server 100 has not caught up during the fast forward playback or rewind playback of the video. Can be played forward or backward. Therefore, even if a low-resolution moving image is displayed, it is possible to fast-forward or rewind the moving image while confirming the reproduction position. Therefore, it is possible to avoid the situation where it becomes impossible to fast forward or rewind the moving image. Therefore, according to the first embodiment, it is possible to comfortably view a moving image via a network.
　上記第１の実施形態では、端末装置２００が、早送り再生又は巻戻し再生を行う部分の動画データが未取得である場合に、その動画データの代わりにサムネイル画像データを早送り再生又は巻戻し再生する例を説明した。しかしながら、第１の実施形態は、このような例に限られない。例えば、端末装置２００は、早送り再生又は巻戻し再生を行う部分の動画データが未取得であるか否かに関わらず、早送り再生又は巻戻し再生の際にはサムネイル画像データを用いて行うようにしてもよい。 In the first embodiment, when the moving image data of the portion to be fast-forwarded or rewound is not acquired, the terminal device 200 performs fast-forward playback or rewind playback instead of the moving image data. An example was explained. However, the first embodiment is not limited to such an example. For example, the terminal device 200 uses the thumbnail image data for fast forward playback or rewind playback regardless of whether or not the moving image data of the portion for fast forward playback or rewind playback has not been acquired. May be.
　つまり、再生制御部２４２は、早送り再生又は巻戻し再生を行う部分の動画データをデータ取得部２４３が取得済みの場合であっても、サムネイル画像データを早送り再生又は巻戻し再生して表示部２１１に表示させてもよい。
　これにより、早送り再生又は巻戻し再生時の処理の負荷を軽減することができる。このため、端末装置２００において必要な処理能力を低減することができ、端末装置２００の低コスト化に繋がる。また、端早送り再生又は巻戻し再生時の処理に必要な電力を低減することができるため、端末装置２００のバッテリー駆動時間を長くすることができる。 That is, the playback control unit 242 performs the fast-forward playback or rewind playback of the thumbnail image data even when the data acquisition unit 243 has already acquired the moving image data of the portion for which fast-forward playback or rewind playback is performed. May be displayed.
Thereby, the processing load at the time of fast forward reproduction or rewind reproduction can be reduced. For this reason, the processing capability required in the terminal device 200 can be reduced, leading to cost reduction of the terminal device 200. In addition, since the power required for the processing during the fast forward playback or the rewind playback can be reduced, the battery driving time of the terminal device 200 can be extended.
　データ取得部２４３は、動画データを再生したときの所定の時間間隔ごとのフレーム画像のサムネイル画像データを取得してもよい。
　これにより、早送り再生又は巻戻し再生時に再生するフレーム画像の数が間引かれるため、早送り再生又は巻戻し再生時の処理の負荷を軽減することができる。 The data acquisition unit 243 may acquire thumbnail image data of frame images at predetermined time intervals when moving image data is reproduced.
As a result, the number of frame images to be reproduced at the time of fast forward reproduction or rewind reproduction is thinned, so that the processing load at the time of fast forward reproduction or rewind reproduction can be reduced.
　データ取得部２４３は、動画データのキーフレームごとのフレーム画像のサムネイル画像データを取得してもよい。
　このように、キーフレームごとのサムネイル画像データを用いれば、単に所定の時間間隔のサムネイル画像データを用いるよりも早送り再生及び巻戻し再生時の動画の画質の低下を抑制することができる。 The data acquisition unit 243 may acquire thumbnail image data of a frame image for each key frame of moving image data.
In this way, if thumbnail image data for each key frame is used, it is possible to suppress a reduction in the image quality of a moving image during fast forward playback and rewind playback, compared to simply using thumbnail image data at a predetermined time interval.
＜第２の実施形態＞
　次に、本発明の第２の実施形態について説明する。第２の実施形態による動画配信システム１及び端末装置２００の構成は第１の実施形態と同様であるので、第２の実施形態において特徴的な処理について説明する。
　第１の実施形態では、動画の早送り再生又は巻戻し再生の処理において、動画データの代わりにサムネイル画像データを用いる例を説明した。第２の実施形態では、動画の再生時においても、再生する動画データが未取得の場合には、その動画データの代わりにサムネイル画像データを再生する例を説明する。 <Second Embodiment>
Next, a second embodiment of the present invention will be described. Since the configuration of the moving image distribution system 1 and the terminal device 200 according to the second embodiment is the same as that of the first embodiment, characteristic processing in the second embodiment will be described.
In the first embodiment, the example in which the thumbnail image data is used instead of the moving image data in the fast-forward playback or rewind playback processing of the moving image has been described. In the second embodiment, an example in which thumbnail image data is reproduced instead of the moving image data when the moving image data to be reproduced is not acquired even when the moving image is reproduced.
　例えば、再生制御部２４２は、動画の再生を指示する指示情報が入力情報取得部２４１から供給されると、取得済みの動画データを再生するとともに、動画データの未取得の部分を再生する場合には、サムネイル画像データをサムネイルデータ記憶部２３２から読み出して再生する。動画データの未取得の部分を再生する場合の具体例は、動画の再生中に通信環境が悪化して動画データの取得が追い付かなくなった場合である。また、別の具体例は、動画の再生中にユーザによりシーク操作が行われ、シーク操作後に再生する部分の動画データが未取得である場合である。シーク操作とは、早送り再生及び巻戻し再生とは異なり、動画の再生箇所をスキップする操作のことをいう。例えば、動画の再生箇所を表すシークバー上のスライダー（つまみ）の位置を移動させることにより、任意の箇所から動画を再生することができる。 For example, when instruction information for instructing reproduction of a moving image is supplied from the input information acquisition unit 241, the reproduction control unit 242 reproduces the acquired moving image data and reproduces an unacquired portion of the moving image data. Reads out the thumbnail image data from the thumbnail data storage unit 232 and reproduces it. A specific example of the case where the unacquired portion of the moving image data is reproduced is a case where the communication environment deteriorates during the reproduction of the moving image and the acquisition of the moving image data cannot be caught up. Another specific example is a case where a seek operation is performed by the user during the reproduction of a moving image, and moving image data of a portion to be reproduced after the seek operation is not acquired. The seek operation refers to an operation of skipping a playback portion of a moving image, unlike fast forward playback and rewind playback. For example, by moving the position of a slider (knob) on a seek bar that represents the playback location of the moving image, the moving image can be played from any location.
　次に、第２の実施形態による端末装置２００が実行する動画の再生処理の動作を説明する。
　図６は、第２の実施形態による動画の再生処理の一例を示すフローチャートである。 Next, the operation of the moving image playback process executed by the terminal device 200 according to the second embodiment will be described.
FIG. 6 is a flowchart illustrating an example of a moving image playback process according to the second embodiment.
　再生制御部２４２は、動画を再生する操作がされたか否かを判定する（ステップＳ２１０）。再生制御部２４２は、動画の再生を指示する指示情報が入力情報取得部２４１から供給されない場合、動画を再生する操作がされていないと判定する（ステップＳ２１０：Ｎｏ）。この場合、再生制御部２４２は、再生処理を行なわずに動画を再生する操作がされるのを待機する。 The reproduction control unit 242 determines whether or not an operation for reproducing a moving image has been performed (step S210). When the instruction information for instructing the reproduction of the moving image is not supplied from the input information acquisition unit 241, the reproduction control unit 242 determines that the operation for reproducing the moving image is not performed (step S210: No). In this case, the reproduction control unit 242 waits for an operation to reproduce a moving image without performing the reproduction process.
　一方、再生制御部２４２は、動画の再生を指示する指示情報が入力情報取得部２４１から供給された場合、動画を再生する操作がされたと判定する（ステップＳ２１０：Ｙｅｓ）。この場合、再生制御部２４２は、データ取得部２４３を介して動画配信サーバ１００に対して動画の配信要求を行う。データ取得部２４３は、動画配信サーバ１００から動画データの取得を開始する。また、データ取得部２４３は、動画配信サーバ１００からサムネイル画像データを取得する。 On the other hand, when the instruction information for instructing the reproduction of the moving image is supplied from the input information acquisition unit 241, the reproduction control unit 242 determines that an operation for reproducing the moving image has been performed (step S <b> 210: Yes). In this case, the reproduction control unit 242 makes a moving image distribution request to the moving image distribution server 100 via the data acquisition unit 243. The data acquisition unit 243 starts acquiring moving image data from the moving image distribution server 100. The data acquisition unit 243 acquires thumbnail image data from the moving image distribution server 100.
　次に、再生制御部２４２は、動画データ記憶部２３１を参照して、再生を行う部分の動画データが取得済みであるか否かを判定する（ステップＳ２２０）。
　ステップＳ２２０において、再生を行う部分の動画データが取得済みであると判定された場合（ステップＳ２２０：Ｙｅｓ）について説明する。この場合、再生制御部２４２は、動画データを動画データ記憶部２３１から読み出して再生する（ステップＳ２３０）。 Next, the reproduction control unit 242 refers to the moving image data storage unit 231 and determines whether or not moving image data of a portion to be reproduced has been acquired (step S220).
The case where it is determined in step S220 that the moving image data of the part to be reproduced has been acquired (step S220: Yes) will be described. In this case, the reproduction control unit 242 reads out and reproduces the moving image data from the moving image data storage unit 231 (step S230).
　一方、ステップＳ２２０において、早送り再生又は巻戻し再生を行う部分の動画データが未取得であると判定された場合（ステップＳ２２０：Ｎｏ）について説明する。この場合、再生制御部２４２は、再生を行う部分の動画データに対応するサムネイル画像データを、サムネイルデータ記憶部２３２から読み出して再生する（ステップＳ２４０）。 On the other hand, a case will be described in which it is determined in step S220 that the moving image data of the portion for performing fast forward playback or rewind playback has not been acquired (step S220: No). In this case, the reproduction control unit 242 reads out thumbnail image data corresponding to the moving image data of the portion to be reproduced from the thumbnail data storage unit 232 and reproduces it (step S240).
　次に、再生制御部２４２は、再生している動画データ又はサムネイル画像データが最終フレームに到達したか否かを判定する（ステップＳ２５０）。再生の場合の最終フレームとは動画の最後のフレームを意味する。 Next, the playback control unit 242 determines whether or not the moving image data or thumbnail image data being played has reached the final frame (step S250). The last frame in the case of reproduction means the last frame of the moving image.
　再生制御部２４２は、再生している動画データ又はサムネイル画像データが最終フレームに到達していない場合（ステップＳ２５０：Ｎｏ）、ステップＳ２７０の処理に進める。一方、再生制御部２４２は、再生している動画データ又はサムネイル画像データが最終フレームに到達した場合（ステップＳ２５０：Ｙｅｓ）、そのフレームで再生を一時停止させてから（ステップＳ２６０）、ステップＳ２７０の処理に進める。 When the moving image data or thumbnail image data being reproduced has not reached the final frame (step S250: No), the reproduction control unit 242 proceeds to the process of step S270. On the other hand, when the moving image data or thumbnail image data being reproduced has reached the final frame (step S250: Yes), the reproduction control unit 242 pauses reproduction at that frame (step S260), and then proceeds to step S270. Proceed to processing.
　次に、再生制御部２４２は、動画の再生を停止する操作がされたか否かを判定する（ステップＳ２７０）。再生制御部２４２は、動画の再生を停止する指示情報が入力情報取得部２４１から供給されない場合、動画の再生を停止する操作がされていないと判定する（ステップＳ２７０：Ｎｏ）。この場合、再生制御部２４２は、ステップＳ２２０に処理を戻し、動画の再生処理を継続する。 Next, the playback control unit 242 determines whether or not an operation for stopping the playback of the moving image has been performed (step S270). When the instruction information for stopping the reproduction of the moving image is not supplied from the input information acquisition unit 241, the reproduction control unit 242 determines that an operation for stopping the reproduction of the moving image has not been performed (step S <b> 270: No). In this case, the reproduction control unit 242 returns the process to step S220 and continues the moving image reproduction process.
　一方、再生制御部２４２は、動画の再生を停止する指示情報が入力情報取得部２４１から供給された場合、動画の再生を停止する操作がされたと判定する（ステップＳ２７０：Ｙｅｓ）。この場合、再生制御部２４２は、再生処理を終了する。 On the other hand, when the instruction information for stopping the reproduction of the moving image is supplied from the input information acquisition unit 241, the reproduction control unit 242 determines that an operation for stopping the reproduction of the moving image has been performed (step S <b> 270: Yes). In this case, the reproduction control unit 242 ends the reproduction process.
　上記説明では、端末装置２００が再生中の動画のサムネイル画像データの取得が完了していることを前提としている。しかしながら、サムネイル画像データの取得が完了していない場合も考えられる。その場合、再生制御部２４２は、ステップＳ２４０のサムネイル画像データを再生する処理において、サムネイル画像データが未取得の場合には一旦一時停止して、サムネイル画像データの取得を待ってからサムネイル画像データの再生を再開するようにしてもよい。 In the above description, it is assumed that the thumbnail image data of the moving image being played back by the terminal device 200 has been acquired. However, there may be a case where the acquisition of thumbnail image data is not completed. In that case, the reproduction control unit 242 pauses the thumbnail image data if it has not been acquired in the process of reproducing the thumbnail image data in step S240, waits for the acquisition of the thumbnail image data, and then deletes the thumbnail image data. Playback may be resumed.
　以上説明したように、第２の実施形態による端末装置２００は、データ取得部２４３（取得部）と、再生制御部２４２とを備え、動画を配信する動画配信サーバ１００（動画配信装置）にネットワーク５を介して接続される。データ取得部２４３は、動画の動画データと動画データを低解像度にしたサムネイル画像データ（低解像度画像データ）とを動画配信サーバ１００から取得する。再生制御部２４２は、再生を行う部分の動画データをデータ取得部２４３が未取得の場合、未取得の動画データに対応するサムネイル画像データを再生して表示部２１１に表示させる。 As described above, the terminal device 200 according to the second embodiment includes the data acquisition unit 243 (acquisition unit) and the reproduction control unit 242, and is connected to the video distribution server 100 (video distribution device) that distributes the video. 5 is connected. The data acquisition unit 243 acquires from the moving image distribution server 100 moving image data of moving images and thumbnail image data (low resolution image data) obtained by reducing the moving image data to low resolution. When the data acquisition unit 243 has not acquired the moving image data to be reproduced, the reproduction control unit 242 reproduces thumbnail image data corresponding to the unacquired moving image data and causes the display unit 211 to display the thumbnail image data.
　これにより、第２の実施形態による端末装置２００は、動画の再生を行う際に、動画配信サーバ１００からの動画データの取得が追い付いていなくとも、動画データの代わりにサムネイル画像データを再生することができる。よって、端末装置２００は、低解像度の動画表示になるとしても動画の再生を行うことができる。ゆえに、動画を再生できなくなってしまうことを回避することができる。したがって、第２の実施形態によれば、ネットワーク経由による動画の視聴を快適に行うことができる。 Thereby, the terminal device 200 according to the second embodiment reproduces the thumbnail image data instead of the moving image data even when the acquisition of the moving image data from the moving image distribution server 100 does not catch up when reproducing the moving image. Can do. Therefore, the terminal device 200 can reproduce a moving image even when a low-resolution moving image is displayed. Therefore, it can be avoided that the moving image cannot be reproduced. Therefore, according to the second embodiment, it is possible to comfortably view a moving image via a network.
　以上、この発明の第１及び第２の実施形態を図面を参照して詳述してきたが、具体的な構成はこの実施形態に限られず、この発明の要旨を逸脱しない範囲の設計等も含まれる。例えば、上述の第１及び第２の実施形態において説明した各機能は、任意に組み合わせることができる。 As described above, the first and second embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention. It is. For example, the functions described in the first and second embodiments described above can be arbitrarily combined.
　図３に示す制御部２４０の一部又は全部は専用のハードウェアにより実現されてもよく、また、メモリおよびＣＰＵ（中央演算装置）により構成され、上述の各部の機能を実現するためのプログラムをメモリにロードして実行することによりその機能を実現させてもよい。 A part or all of the control unit 240 shown in FIG. 3 may be realized by dedicated hardware, or configured by a memory and a CPU (central processing unit), and a program for realizing the functions of the above-described units. The function may be realized by loading it into a memory and executing it.
　例えば、図３における制御部２４０の一部又は全部の機能を実現するためのプログラムをコンピュータ読み取り可能な記録媒体に記録して、この記録媒体に記録されたプログラムをコンピュータシステムに読み込ませ、実行することにより上述の各部の処理を行ってもよい。ここでいう「コンピュータシステム」とは、ＯＳや周辺機器等のハードウェアを含む。 For example, a program for realizing part or all of the functions of the control unit 240 in FIG. 3 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. As a result, the processing of each unit described above may be performed. The “computer system” here includes an OS and hardware such as peripheral devices.
　図３における制御部２４０の一部又は全部の機能を実現するためのプログラムは、動画配信サーバ１００から提供されてもよい。例えば、端末装置１００は、動画を再生する場合に、上記プログラムを動画配信サーバ１００からダウンロードしてインストールすることにより端末装置１００のコンピュータシステムに読み込ませ、実行することにより上述の各部の処理を行ってもよい。図３における制御部２４０の一部又は全部の機能を実現するためのプログラムは、動画配信サーバ１００以外のサーバ装置（例えば、各種のアプリケーションを提供するサーバ装置）から提供されてもよい。 A program for realizing a part or all of the functions of the control unit 240 in FIG. For example, when playing back a moving image, the terminal device 100 downloads the program from the moving image distribution server 100 and installs it to be read into the computer system of the terminal device 100 and executes the processing of each unit described above. May be. A program for realizing a part or all of the functions of the control unit 240 in FIG. 3 may be provided from a server device other than the moving image distribution server 100 (for example, a server device that provides various applications).
　「コンピュータシステム」は、ＷＷＷシステムを利用している場合であれば、ホームページ提供環境（あるいは表示環境）も含む。
　「コンピュータ読み取り可能な記録媒体」は、フレキシブルディスク、光磁気ディスク、ＲＯＭ、ＣＤ－ＲＯＭ等の可搬媒体、コンピュータシステムに内蔵されるハードディスク等の記憶装置を含む。さらに「コンピュータ読み取り可能な記録媒体」は、インターネット等のネットワークや電話回線等の通信回線を介してプログラムが送信された場合のサーバやクライアントとなるコンピュータシステム内部の揮発性メモリ（ＲＡＭ）のように、一定時間プログラムを保持しているものも含む。上記プログラムは、前述した機能の一部を実現するためのプログラムであってもよく、さらに前述した機能をコンピュータシステムにすでに記録されているプログラムとの組み合わせで実現できるプログラムであってもよい。 The “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” includes a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in the computer system. Further, the “computer-readable recording medium” is a volatile memory (RAM) inside a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. Including those holding programs for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in the computer system.
　本発明は、端末装置、制御方法、およびプログラムに適用してもよい。 The present invention may be applied to a terminal device, a control method, and a program.
　１　動画配信システム
　５　ネットワーク
　１００　動画配信サーバ
　２００　端末装置
　２１０　タッチパネル
　２１１　表示部
　２１２　入力部
　２２０　通信部
　２３０　データ記憶部
　２３１　動画データ記憶部
　２３２　サムネイルデータ記憶部
　２４０　制御部
　２４１　入力情報取得部
　２４２　再生制御部
　２４３　データ取得部
　２４４　表示制御部 DESCRIPTION OF SYMBOLS 1 Movie distribution system 5 Network 100 Movie distribution server 200 Terminal device 210 Touch panel 211 Display unit 212 Input unit 220 Communication unit 230 Data storage unit 231 Movie data storage unit 232 Thumbnail data storage unit 240 Control unit 241 Input information acquisition unit 242 Playback control unit 243 Data acquisition unit 244 Display control unit

Claims (11)

  1. 　動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得する取得部と、
    　前記動画データに基づく動画を再生して表示部に表示させるとともに、前記低解像度画像データに基づく画像を早送り再生又は巻戻し再生して前記表示部に表示させる再生制御部と、
    　を備える端末装置。     An acquisition unit for acquiring from the video distribution device video data of the video and low-resolution image data of the video having a resolution lower than the resolution of the video data;
    A reproduction control unit that reproduces a moving image based on the moving image data and causes the display unit to display the image, and fast-forward reproduction or rewind reproduction of an image based on the low-resolution image data,
    A terminal device comprising:
  2. 　前記再生制御部は、
    　早送り再生又は巻戻し再生を行う部分の前記動画データを前記取得部が取得していない場合、前記低解像度画像データに基づく画像を早送り再生又は巻戻し再生して前記表示部に表示させる、
    　請求項１に記載の端末装置。     The reproduction control unit
    When the acquisition unit has not acquired the moving image data of the portion that performs fast-forward playback or rewind playback, the image based on the low-resolution image data is displayed in the display unit by fast-forward playback or rewind playback,
    The terminal device according to claim 1.
  3. 　前記取得部は、
    　前記動画データに基づく動画を再生したときの所定の時間間隔ごとのフレーム画像の前記低解像度画像データを取得する、
    　を備える請求項１または２に記載の端末装置。     The acquisition unit
    Obtaining the low-resolution image data of a frame image at a predetermined time interval when a moving image based on the moving image data is reproduced;
    The terminal device according to claim 1, comprising:
  4. 　前記取得部は、
    　前記動画データのキーフレームごとのフレーム画像の前記低解像度画像データを取得する、
    　請求項１または２に記載の端末装置。     The acquisition unit
    Obtaining the low-resolution image data of a frame image for each key frame of the moving image data;
    The terminal device according to claim 1 or 2.
  5. 　前記再生制御部は、
    　再生を行う部分の前記動画データを前記取得部が取得していない場合、前記再生を行う部分の前記動画データに対応する前記低解像度画像データに基づく画像を再生して前記表示部に表示させる、
    　請求項１から３の何れか一項に記載の端末装置。     The reproduction control unit
    When the acquisition unit does not acquire the moving image data of the portion to be played back, the image based on the low resolution image data corresponding to the moving image data of the portion to be played back is played and displayed on the display unit.
    The terminal device as described in any one of Claim 1 to 3.
  6. 　前記取得部は、
    　前記動画データと前記低解像度画像データとを、前記動画配信装置からネットワークを介して取得する、
    　請求項１から５の何れか一項に記載の端末装置。     The acquisition unit
    The moving image data and the low-resolution image data are acquired from the moving image distribution device via a network.
    The terminal device as described in any one of Claim 1 to 5.
  7. 　動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得する取得部と、
    　前記動画データに基づく動画を再生して表示部に表示させるとともに、再生を行う部分の前記動画データを前記取得部が取得していない場合、前記再生を行う部分の前記動画データに対応する前記低解像度画像データに基づく画像を再生して前記表示部に表示させる再生制御部と、
    　を備える端末装置。     An acquisition unit for acquiring from the video distribution device video data of the video and low-resolution image data of the video having a resolution lower than the resolution of the video data;
    When the moving image based on the moving image data is reproduced and displayed on the display unit and the moving image data of the portion to be reproduced is not acquired by the acquisition unit, the low level corresponding to the moving image data of the portion to be reproduced is obtained. A reproduction control unit that reproduces an image based on the resolution image data and displays the image on the display unit;
    A terminal device comprising:
  8. 　動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得し、
    　前記動画データに基づく動画を再生して表示部に表示させ、
    　前記低解像度画像データに基づく画像を早送り再生又は巻戻し再生して前記表示部に表示させる、
    　ことを含む制御方法。     Obtaining from the video distribution device video data of the video and low-resolution image data of the video having a resolution lower than the resolution of the video data;
    Play a video based on the video data and display it on the display unit,
    An image based on the low-resolution image data is displayed on the display unit by fast-forward playback or rewind playback.
    A control method comprising:
  9. 　動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得し、
    　前記動画データに基づく動画を再生して表示部に表示させ、
    　再生を行う部分の前記動画データを取得していない場合に前記再生を行う部分の前記動画データに対応する前記低解像度画像データに基づく画像を再生して前記表示部に表示させる、
    　ことを含む制御方法。     Obtaining from the video distribution device video data of the video and low-resolution image data of the video having a resolution lower than the resolution of the video data;
    Play a video based on the video data and display it on the display unit,
    Replaying an image based on the low-resolution image data corresponding to the moving image data of the portion to be reproduced and displaying it on the display unit when the moving image data of the portion to be reproduced is not acquired,
    A control method comprising:
  10. 　動画の動画データと前記動画データの解像度よりも低い解像度を有する前記動画の低解像度画像データとを動画配信装置から取得し、
    　前記動画データに基づく動画を再生して表示部に表示させ、
    　前記低解像度画像データに基づく画像を早送り再生又は巻戻し再生して前記表示部に表示させる、
    　ことをコンピュータに実行させるためのプログラム。     Obtaining from the video distribution device video data of the video and low-resolution image data of the video having a resolution lower than the resolution of the video data;
    Play a video based on the video data and display it on the display unit,
    An image based on the low-resolution image data is displayed on the display unit by fast-forward playback or rewind playback.
    A program that causes a computer to execute.
  11. 　動画の動画データと前記動画データの解像度よりも低い解像度を有する低解像度画像データとを動画配信装置から取得し、
    　前記動画データに基づく動画を再生して表示部に表示させ、
    　再生を行う部分の前記動画データを取得していない場合、前記再生を行う部分の前記動画データに対応する前記低解像度画像データに基づく画像を再生して前記表示部に表示させる、
    　ことをコンピュータに実行させるためのプログラム。     Obtaining video data of video and low resolution image data having a resolution lower than the resolution of the video data from the video distribution device,
    Play a video based on the video data and display it on the display unit,
    When the moving image data of the portion to be reproduced is not acquired, an image based on the low resolution image data corresponding to the moving image data of the portion to be reproduced is reproduced and displayed on the display unit.
    A program that causes a computer to execute.
PCT/JP2015/063758 2014-05-16 2015-05-13 Terminal device, control method, and program WO2015174451A1 (en)

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JPH0974540A (en) * 1995-09-06 1997-03-18 Nippon Telegr & Teleph Corp <Ntt> Moving image encoding information generation device for real-time fast forward reproduction
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