JP7420239B2 - Display control device, display control system, display control method, and display control program - Google Patents

Description

The present invention relates to a display control device, a video management device, a display control system, a display control method, a video management method, and a recording medium.

Video is encoded into a video data format and recorded or transmitted in the video data format. Video data is composed of a set of a plurality of still image data. This still image is called a frame. For example, video data corresponding to one second of video in television broadcasting is composed of 30 frames of still image data.

According to standards established by MPEG (Moving Picture Experts Group) (for example, MPEG-4 AVC (Advanced Video Coding) (Non-Patent Document 1)), encoding is performed in units of GOP (Group Of Pictures). A GOP is a unit of encoding and is composed of one or more frames.

Each image (frame or field) within a GOP is encoded as an I (Intra coded) picture, a P (Predictive coded) picture, or a B (Bidirectional predictive coded) picture.

An I picture is a picture that is encoded using only information about its own picture without referring to information about other pictures.

A P picture is a picture that is encoded with reference to information about temporally past pictures. The data amount of a P picture is smaller than that of an I picture.

A B picture is a picture that is encoded with reference to information regarding temporally past and future pictures. The data amount of a B picture is smaller than that of an I picture or a P picture.

Since the I-picture is encoded with only information related to its own picture, it can be decoded independently. On the other hand, when decoding a P picture and a B picture, information on a reference picture is required.

A GOP includes one or more I pictures. A GOP may consist of only I pictures, some I pictures and P pictures in place of the remaining I pictures, or some I pictures and P pictures in place of the remaining I pictures. It may be composed of a picture and a B picture. When a GOP includes P pictures and B pictures, the amount of video data per unit playback time is smaller than when the GOP includes only I pictures and does not include P pictures and B pictures. Therefore, video data transmitted over the Internet is often encoded in a configuration that includes P pictures and B pictures in a GOP in order to reduce the transmission load.

ISO/IEC 14496-10, “MPEG-4 Part 10 Advanced Video Coding”

The video data is decoded by a receiving device having a decoding function, and the decoded video is displayed on a display means. Playback is the process of decoding video data into video and displaying the decoded video.

One of the tasks for checking in detail the video displayed on the display means is checking each frame image one by one.

However, as described above, in order to reduce the transmission load, video data transmitted over the Internet is often encoded in a configuration in which the GOP includes not only I-pictures but also P-pictures and B-pictures. If the video data is encoded in a configuration in which the GOP includes a P picture or a B picture, and the frame to be checked is encoded as a P picture or a B picture, the receiving device should display a clear frame image on the display means. I can't.

When the video data is encoded in a configuration in which the GOP includes only I pictures, the receiving device can display a clear frame image for each frame on the display means. However, in this case, as described above, since the amount of data is large, the transmission load is heavy.

An object of the present invention is to provide a display control device, a video management device, a display control system, a display control method, a video management method, and a recording medium that enable both reduction of transmission load and display of clear frame images. It is about providing.

In one aspect of the present invention, the display control device includes second video data having a smaller amount of data per unit playback time than the first video data, and the first video data regarding the same original video data. receiving means for receiving still image data of frames of a predetermined period of video data, and control for causing a display means to display a screen displaying a video based on the second video data and a still image based on the still image data. It is characterized by comprising means.

In another aspect of the present invention, the video management device has a larger amount of data per unit playback time than the second video data used for video display processing in the display control device, and generating means for generating still image data of frames included in the first video data in units of frames from first video data regarding the same original video; and sending the generated still image data to the display control device. and a transmitting means for transmitting.

In another aspect of the present invention, the display control method includes: regarding the same original video as the first video data, second video data having a smaller amount of data per unit playback time than the first video data; receiving still image data of frames of a predetermined period of first video data, and causing a display means to display a screen displaying a video based on the second video data and a still image based on the still image data; It is characterized by

In another aspect of the present invention, the video management method includes a video management method in which the amount of data per unit playback time is larger than the second video data used for video display processing in the display control device; Generating still image data of frames included in the first video data from first video data regarding the same original video in units of frames, and transmitting the generated still image data to the display control device. It is characterized by

In another aspect of the present invention, the display control program recorded on the computer-readable recording medium causes the computer to display the same source video data as the first video data per unit playback time compared to the first video data. a reception function that receives second video data having a small amount of data and still image data of frames of a predetermined period of the first video data, and a video based on the second video data and the still image data. The present invention is characterized in that it realizes a still image based on the method and a control function for displaying a screen displaying the still image on the display means.

In another aspect of the present invention, the video management program recorded on the computer-readable recording medium allows the computer to collect data per unit playback time from second video data used for video display processing in the display control device. a generation function that generates still image data of frames included in the first video data in units of frames from first video data that has a large amount of data and is related to the same original video as the second video data; The present invention is characterized by realizing a transmission function of transmitting the generated still image data to the display control device.

According to the present invention, it is possible to both reduce transmission load and display clear frame images.

FIG. 1 is a diagram illustrating an example configuration of a display control device and a video management device according to a first embodiment of the present invention. It is a figure showing an example of operation of a display control device of a first embodiment of the present invention. FIG. 3 is a diagram showing an example of the operation of the video management device according to the first embodiment of the present invention. FIG. 7 is a diagram showing an example of the configuration of a display control device and a video management device according to a second embodiment of the present invention. It is a figure which shows the example of the screen which the display control apparatus of 2nd embodiment of this invention displays on a display means. It is a figure showing an example of operation of a display control device and a picture management device of a second embodiment of the present invention. FIG. 7 is a diagram illustrating another example of the operation of the display control device and the video management device according to the second embodiment of the present invention. FIG. 7 is a diagram illustrating another example of the operation of the display control device and the video management device according to the second embodiment of the present invention. FIG. 7 is a diagram illustrating another example of the operation of the display control device and the video management device according to the second embodiment of the present invention. 1 is a diagram showing an example of a hardware configuration of each embodiment of the present invention. FIG.

[First embodiment]
A first embodiment of the present invention will be described.

FIG. 1 shows a configuration example of a display control device 10 and a video management device 20 of this embodiment. The display control device 10 of this embodiment includes a receiving section 11 and a control section 12.

Regarding the same original video as the first video data, the receiving unit 11 receives second video data that has a smaller amount of data per unit playback time than the first video data, and a frame of a predetermined period of the first video data. Receive still image data. The control unit 12 causes the display unit 60 to display a screen displaying a video based on the second video data and a still image based on the still image data.

Further, the video management device 20 of this embodiment includes a generation section 21 and a transmission section 22.

The generation unit 21 generates first video data that has a larger amount of data per unit playback time than the second video data used for video display processing in the display control device 10 and is related to the same original video as the second video data. From this, still image data of frames included in the first video data is generated in units of frames. Further, the transmitter 22 transmits the generated still image data to the display control device 10.

By configuring the display control device 10 in this way, the display control device 10 can display the second video data, which has a smaller amount of data per unit playback time than the first video data, and the predetermined period of the first video data. The still image data of the frame is received. Then, the display control device 10 causes the display unit 60 to display a screen on which a video based on the second video data and a still image based on the still image data are displayed. Further, the video management device 20 generates frame still image data in units of frames from the first video data, and transmits the generated still image data to the display control device 10. Thereby, the display control device 10 causes the display unit 60 to display a screen displaying a video based on the second video data, which has a smaller amount of data per unit playback time than the first video data. As a result, the transmission load can be reduced compared to the case where a video based on the first video data is displayed. The video management device 20 also generates frame still image data from the first video data. The display control device 10 also receives still image data of a frame of first video data, and causes the display unit 60 to display a screen displaying a still image based on the still image data. As a result, it becomes possible to cause the display unit 60 to display a screen displaying a still image that is clearer than the still image of the frame generated from the second video data. Therefore, it becomes possible to both reduce the transmission load and display clear frame images.

Next, FIG. 2 shows an example of the operation of the display control device 10 of this embodiment.

Regarding the same original video as the first video data, the receiving unit 11 receives second video data that has a smaller amount of data per unit playback time than the first video data, and a frame of a predetermined period of the first video data. Still image data is received (step S101). The control unit 12 causes the display unit 60 to display a screen displaying a video based on the second video data and a still image based on the still image data (step S102).

Further, FIG. 3 shows an example of the operation of the video management device 20 of this embodiment.

The generation unit 21 generates still image data of frames included in the first video data in units of frames from the first video data (step S201). Furthermore, the transmitter 22 transmits the generated still image data to the display control device 10 (step S202).

As explained above, in the first embodiment of the present invention, the display control device 10 uses the second video data, which has a smaller amount of data per unit playback time than the first video data, and the first video data. Still image data of frames of a predetermined period are received. Then, the display control device 10 causes the display unit 60 to display a screen on which a video based on the second video data and a still image based on the still image data are displayed. Further, the video management device 20 generates frame still image data in units of frames from the first video data, and transmits the generated still image data to the display control device 10. Therefore, it becomes possible to both reduce the transmission load and display clear frame images.

[Second embodiment]
Next, a display control system according to a second embodiment of the present invention will be described.

First, FIG. 4 shows a configuration example of the display control system of this embodiment. The display control system of this embodiment includes a display control device 10 and a video management device 40. Display means 60 is connected to display control device 10 .

The video management device 40 stores first video data. The first video data is video data registered in the video management device 40. In this embodiment, it is assumed that the first video data is data that does not include a P picture or a B picture in a GOP, that is, is data that is encoded in a configuration of I pictures. Note that the first video data is not limited to this, but is data that has a larger amount of data per unit playback time (higher bit rate) than the second video data, regarding the same original video as the second video data described below. It is. The first video data is registered in the video management device 40 by the user of the video management device 40.

The display control device 10 causes the display means 60 to display the video. The display control device 10 of this embodiment causes the display means 60 to display a video based on the second video data. The second video data relates to the same original video as the first video data, but has a smaller amount of data per unit playback time than the first video data. For example, the second video data may be data compressed and encoded using a method with a higher compression rate than the first video data. For example, the second video data may include data in which a GOP includes some I pictures and a P picture instead of the remaining I pictures, or data in which a GOP includes some I pictures and a P picture in place of the remaining I pictures. The data may include a picture and a B picture. Alternatively, the second video data may have a lower resolution than the first video data.

Note that the video that is displayed after the first video data is decoded and the video that is displayed after the second video data is decoded correspond to each other. In other words, it is assumed that frames in the video in which the first video data is decoded and displayed and frames in the video in which the second video data is decoded and displayed correspond to each other at each timing of the playback time. .

The display means 60 displays a screen according to information from the display control device 10. Note that the display means 60 may include a display or the like as an output device, or may include a touch panel or the like as an input/output device.

Next, a configuration example of the video management device 40 of this embodiment will be described using FIG. 4.

The video management device 40 of this embodiment includes a generation section 21, a transmission section 22, and a storage section 43.

The generation unit 21 generates still image data of frames included in the first video data in units of frames from the first video data. Furthermore, the generation unit 21 causes the storage unit 43 to store the generated still image data. Further, the generation unit 21 generates second video data based on the first video data, and causes the storage unit 43 to store the generated second video data. Note that the generation unit 21 may cause the storage unit 43 to store second video data generated by another device.

For example, if the first video data has a configuration in which a GOP includes an I picture but does not include a P picture or a B picture, the generation unit 21 generates still image data of each frame based on the I picture included in the GOP. generate.

The still image data includes identification information indicating which frame of the first video data the still image data belongs to. This identification information also indicates which frame of the second video data it corresponds to. The identification information may be some kind of serial number, or may be information indicating the playback elapsed time from a predetermined starting point.

Note that the second video data may be video data regarding a part of the first video data. Even in this case, the identification information included in the still image data generated by the generation unit 21 is the still image data of which frame of the second video data the still image data is, and whether the still image data is the still image data of the first video data. This is information indicating which frame of still image data is included. Furthermore, in this case, the generation unit 21 generates still image data for frames included in the second video data based on the first video data.

The transmitting unit 22 transmits the second video data stored in the storage unit 43 to the display control device 10. In this embodiment, the transmitter 22 transmits the second video data to the display control device 10 when requested by the display control device 10 . Note that the timing at which the transmitter 22 transmits the second video data to the display control device 10 is arbitrary. For example, the transmitter 22 may transmit the second video data to the display control device 10 when the second video data is generated.

Further, the transmitting unit 22 transmits still image data stored in the storage unit 43 to the display control device 10. In the present embodiment, the transmitting unit 22 transmits still image data of frames in a period requested by the display control device 10 to the display control device 10 in response to a request from the display control device 10. Note that the timing at which the transmitter 22 transmits still image data to the display control device 10 is arbitrary. Furthermore, which frame of still image data the transmitter 22 transmits to the display control device 10 is also arbitrary. For example, when the display control device 10 requests transmission of the second video data, the transmission unit 22 may also transmit still image data.

Next, a configuration example of the display control device 10 of this embodiment will be described using FIG. 4. The display control device 10 of this embodiment includes a receiving section 11 and a control section 12.

The receiving unit 11 receives the second video data from the video management device 40. Further, the receiving unit 11 receives still image data of frames of a predetermined period from the video management device 40.

For example, when receiving an instruction corresponding to a user's operation to select video data, the receiving unit 11 requests the video management device 40 to transmit the second video data selected by the user. Then, the receiving unit 11 receives the selected second video data.

Further, for example, when receiving an instruction from the user in response to an operation to select a frame to be displayed on the display means 60, the receiving unit 11 requests the display control device 10 for still image data of the selected frame. Then, the receiving unit 11 receives still image data of the selected frame.

The control unit 12 causes the display unit 60 to display a screen. The screen that the control unit 12 causes the display unit 60 to display is a screen that displays a video based on the second video data and a still image based on the still image data.

Further, the control unit 12 receives instructions from the user regarding the screen displayed on the display means 60. The control unit 12 receives instructions according to user operations via a keyboard, a mouse, etc., which are examples of input devices. The user operates the input device according to instructions given to the screen displayed on the display means 60. Then, when the user performs a predetermined operation, the control unit 12 receives an instruction corresponding to the operation.

FIG. 5 shows an example of a screen displayed on the display means 60 by the control unit 12.

The screen shown in FIG. 5 includes a video display area 81 and a frame display area 82. The video display area 81 is an area where videos and frame images are displayed. The frame display area 82 is an area for displaying frame images.

The control unit 12 displays a video based on the second video data in the video display area 81, and causes the display unit 60 to display a screen in which a still image based on the still image data is displayed in the frame display area 82.

Further, on the screen shown in FIG. 5, a screen item 83 is displayed for the user to specify a frame in which a still image is to be displayed in the frame display area 82. This screen item 83 may indicate information about a frame in which a still image is displayed in the frame display area 82.

Further, the screen shown in FIG. 5 also displays a screen item 84 for instructing display of a still image of a frame during the period displayed in the screen item 83. When the screen item 84 is selected, the control unit 12 receives an instruction (first still image display instruction) instructing a frame in which a still image is to be displayed in the frame display area 82 . When the first still image display instruction is input, the control unit 12 causes the display unit 60 to display a screen in which still images of frames in the period input to the screen item 83 are displayed in the frame display area 82. At this time, if the receiving unit 11 has not received the still image data of the frame in the period input to the screen item 83, the control unit 12 sends the still image data of the frame in the period to the receiving unit 11 to the video management device. Get it from 40.

Further, on the screen shown in FIG. 5, a screen item 85 for giving instructions regarding the video displayed in the video display area 81 is also displayed. In the example shown in FIG. 5, the screen items 85 indicate, from the left, "fast rewind", "reverse play", "frame back", "pause", "frame forward", "play", and "fast forward". . Note that "fast rewind" refers to playing back video in the opposite order to the normal playback order and at a faster speed than the normal playback order. "Reverse playback" refers to playing back video in the opposite order to the normal playback order and at the same speed as the normal playback speed. "Frame return" refers to displaying the frame image of the frame immediately before the currently displayed frame. "Frame forwarding" means displaying the frame image of the next frame after the currently displayed frame. "Fast forward" is to play back video in the normal playback order at a faster speed than the normal playback order.

When an operation is performed to select one of the screen items 85, the control unit 12 receives an instruction regarding the video display area 81. When an instruction regarding the video display area 81 is input, the control unit 12 causes the display unit 60 to display a screen in which a video or frame image corresponding to the selected screen item 85 is displayed in the video display area 81.

When the control unit 12 receives a stop instruction to "temporarily stop", the control unit 12 causes the video display area 81 to display a frame image of the frame displayed in the video display area 81 at the stop timing at which the stop instruction was issued. At this time, the control unit 12 may cause the video display area 81 to display, as the frame image, a still image based on the still image data of the frame corresponding to the stop timing, instead of a frame image based on the second video data.

Further, when the control unit 12 receives a frame-by-frame forwarding instruction instructing “frame-by-frame forwarding”, the control unit 12 displays a still image based on the still image data of the frame as a frame image of the next frame of the displayed frame. It may also be displayed in the display area 81. In addition, when the control unit 12 receives a frame-back instruction for “frame-back”, the control unit 12 displays a still image based on the still image data of the frame as a frame image of the frame immediately before the displayed frame. It may also be displayed in the display area 81.

Note that, if the receiving unit 11 has not received the still image data of the frame in which the still image is displayed on the screen, the control unit 12 causes the receiving unit 11 to acquire the still image data of the frame from the video management device 40. Then, the receiving unit 11 receives still image data of a frame in which a still image is displayed on the screen.

Further, when the control unit 12 receives a “pause” instruction, it may cause the frame display area 82 to display a still image based on still image data of frames for a predetermined time period from the stop timing. In that case, the control unit 12 may change the display of the screen item 83 according to the frame displayed in the frame display area 82.

Furthermore, when an operation is performed to select one of the still images displayed in the frame display area 82, the control unit 12 issues an instruction (a second still image) to specify the still image to be displayed in the video display area 81. screen display instructions). When receiving the second still image display instruction, the control unit 12 may display the instructed still image in the video display area 81 based on the still image data.

By configuring the display control device 10 in this way, the display control device 10 can display the second video data, which has a smaller amount of data per unit playback time than the first video data, and the predetermined period of the first video data. The still image data of the frame is received. Then, the display control device 10 causes the display unit 60 to display a screen on which a video based on the second video data and a still image based on the still image data are displayed. Further, the video management device 40 generates frame still image data in units of frames from the first video data, and transmits the generated still image data to the display control device 10. Thereby, the display control device 10 causes the display unit 60 to display a screen displaying a video based on the second video data, which has a smaller amount of data per unit playback time than the first video data. As a result, the transmission load can be reduced compared to the case where a video based on the first video data is displayed. Further, the video management device 40 generates frame still image data from the first video data. The display control device 10 also receives still image data of a frame of first video data, and causes the display unit 60 to display a screen displaying a still image based on the still image data. As a result, it becomes possible to cause the display unit 60 to display a screen displaying a still image that is clearer than the still image of the frame generated from the second video data. Therefore, it becomes possible to both reduce the transmission load and display clear frame images.

Next, FIG. 7 shows an example of the operation of the video management device 40 and display control device 10 of this embodiment.

First, when first video data is registered (step S301), the video management device 40 generates second video data. Then, the video management device 40 stores the generated second video data in the storage unit 43 (step S302). Further, the video management device 40 generates still image data for each frame included in the second video data based on the first video data. Then, the video management device 40 stores the generated still image data in the storage unit 43 (step S303).

When the display control device 10 receives the instruction to play the video (step S304), it requests video data from the video management device 40 (step S306).

When the video management device 40 receives the request for video data from the display control device 10, it transmits the second video data (step S306).

The display control device 10 that has received the second video data causes the display unit 60 to display a screen in which a video based on the second video data is displayed in the video display area (step S307).

Furthermore, upon receiving the instruction to display a frame image (step S308), the display control device 10 requests the video management device 40 for a still image of the frame to be displayed (step S309). When the video management device 40 receives the request for still image data, it transmits the still image data of the specified frame to the display control device 10 (step S310). The display control device 10 causes the display unit 60 to display a screen in which a still image based on the received still image data is displayed in the frame display area or the video display area (step S311).

Note that the video management device 40 may generate still image data not when the first video data is registered in the video management device 40 but when still image data is requested from the display control device 10. good. An example of the operation of the video management device 40 and the display control device 10 at this time is shown in FIG. In this way, the video management device 40 does not generate still image data for all frames included in the first video data, but generates still image data for the frames requested by the display control device 10. I can do it.

Further, the video management device 40 may generate still image data when the display control device 10 requests second video data. An example of the operation of the video management device 40 and the display control device 10 at this time is shown in FIG. In the example of FIG. 8, the video management device 40 receives a request for video data from the display control device 10 (step S504), transmits the second video data (step S505), and then generates still image data (step S506). )It is carried out. The video management device 40 may generate still image data in parallel with transmitting the second video data (step S505). In this way, the video management device 40 does not generate still image data for all of the first video data registered in the video management device 40, but instead generates still image data for all of the first video data registered in the video management device 40. still image data can be generated.

Further, the video management device 40 may generate second video data when receiving an instruction to generate video data for reproduction (second video data) from the display control device 10. An example of the operation of the video management device 40 and the display control device 10 at this time is shown in FIG. In the example shown in FIG. 9, when the video management device 40 receives an instruction to generate video data for playback (playback video generation instruction) from the display control device 10 (step S603), the video management device 40 generates second video data. (Step S604). In this way, the video management device 40 selects the first video data for which generation of video data for playback is requested by the display control device 10 from among the first video data registered in the video management device 40. Second video data can be generated for. Also, thereby, the video management device 40 can reduce the amount of storage in the storage unit 43 rather than generating second video data for all the first video data.

Note that in the display control device 10, for example, the receiving unit 11 acquires list data of first video data registered in the video management device 40 from the video management device 40. Furthermore, the control unit 12 causes the display unit 60 to display a screen displaying a list of first video data based on the list data. By doing so, the user can specify the first video data from which the second video data is to be generated. Then, in response to the instruction specifying the first video data for generating the second video data, the receiving unit 11 transmits a reproduction video generation instruction to the video management device 40. Further, the playback video generation instruction may be an instruction to generate second video data for a portion of the first video data.

Further, in the example shown in FIG. 9, the video management device 40 generates still image data (step S605) when receiving an instruction to generate video data for reproduction from the display control device 10. Note that, similarly to the example shown in FIG. 7, the video management device 40 may generate still image data when still image data is requested from the display control device 10 (after step S611). Similarly to the example shown in FIG. 8, the video management device 40 generates still image data when the display control device 10 requests second video data (after step S607 or after step S608). You can go to

As explained above, in the second embodiment of the present invention, the display control device 10 uses the second video data, which has a smaller amount of data per unit playback time than the first video data, and the first video data. Still image data of frames of a predetermined period are received. Then, the display control device 10 causes the display unit 60 to display a screen on which a video based on the second video data and a still image based on the still image data are displayed. Further, the video management device 20 generates frame still image data in units of frames from the first video data, and transmits the generated still image data to the display control device 10. Therefore, it becomes possible to both reduce the transmission load and display clear frame images.

[Hardware configuration example]
Hardware that implements the display control device (10) and video management device (20, 40) (hereinafter referred to as "display control device etc.") in each embodiment of the present invention described above using one information processing device (computer) An example of the configuration of hardware resources will be explained. Note that the display control device and the like may be physically or functionally realized using at least two or more information processing devices. Further, the display control device and the like may be realized as a dedicated device, or a general-purpose device may be used. Further, only some functions of the display control device and the like may be realized using the information processing device.

FIG. 10 is a diagram schematically showing an example of the hardware configuration of an information processing device that can implement the display control device and the like of each embodiment of the present invention. Information processing device 90 includes a communication interface 91, an input/output interface 92, an arithmetic device 93, a storage device 94, a nonvolatile storage device 95, and a drive device 96.

For example, the receiving section 11 of the display control device 10 in FIG. Furthermore, the generation unit 21 of the video management device 20 can be implemented by the arithmetic unit 93, and the transmission unit 22 can be implemented by the communication interface 91.

The communication interface 91 is a communication means for the display control device and the like of each embodiment to communicate with an external device at least one of wired and wireless communication. Note that when the display control device or the like is implemented using at least two information processing devices, these devices may be connected to each other via the communication interface 91 so that they can communicate with each other.

The input/output interface 92 is a man-machine interface such as a keyboard as an example of an input device and a display as an output device.

The arithmetic device 93 is realized by, for example, an arithmetic processing device such as a CPU (Central Processing Unit) or a microprocessor, and a plurality of electric circuits. The arithmetic device 93 can, for example, read various programs stored in the nonvolatile storage device 95 into the storage device 94 and execute processing according to the read programs.

The storage device 94 is a memory device such as a RAM (Random Access Memory) that can be referenced by the arithmetic device 93, and stores programs, various data, and the like. Storage device 94 may be a volatile memory device.

The nonvolatile storage device 95 is a nonvolatile storage device such as a ROM (Read Only Memory) or a flash memory, and is capable of storing various programs, data, and the like.

The drive device 96 is, for example, a device that processes reading and writing of data recorded on a recording medium 97, which will be described later.

The recording medium 97 is any recording medium capable of recording data, such as an optical disk, a magneto-optical disk, or a semiconductor flash memory.

In each embodiment of the present invention, for example, a display control device or the like is configured by the information processing device 90 illustrated in FIG. This may be realized by supplying.

In this case, the embodiment can be realized by the arithmetic device 93 executing a program supplied to the display control device or the like. Further, it is also possible to configure not all but some functions of the display control device and the like with the information processing device 90.

Further, the program may be recorded in the recording medium 97 and stored in the non-volatile storage device 95 as appropriate during the shipping stage or operation stage of the display control device or the like. In this case, the above-mentioned program may be supplied by installing it into the display control device or the like using an appropriate jig at the manufacturing stage or operation stage before shipping. Further, as the method for supplying the program, a general procedure such as a method of downloading the program from an external source via a communication line such as the Internet may be adopted.

Part or all of the above embodiments may be described as in the following additional notes, but are not limited to the following.

(Additional note 1)
Regarding the same original video as the first video data, second video data having a smaller amount of data per unit playback time than the first video data, and still image data of frames of a predetermined period of the first video data. and a receiving means for receiving the
A display control device comprising: control means for causing a display means to display a screen displaying a video based on the second video data and a still image based on the still image data.

(Additional note 2)
The display control device according to appendix 1, wherein the screen includes a video display area that displays the video and a frame display area that displays the still image.

(Appendix 3)
The control means, in response to a first still image display instruction that specifies the frame in which the still image is to be displayed in the frame display area, displays the still image of the frame specified by the first still image display instruction. The display control device according to appendix 2, wherein the display device displays the screen in which the still image based on data is displayed in the frame display area.

(Additional note 4)
The control means, in response to a stop instruction to temporarily stop the video, displays the still image in the video display area based on the still image data of the frame corresponding to the stop timing at which the stop instruction is issued. The display control device according to appendix 2 or 3, wherein the displayed screen is displayed on the display means.

(Appendix 5)
The control means, in response to the stop instruction, displays the screen in the frame display area with the still image based on the still image data of the frame for a predetermined time period from the stop timing at which the stop instruction was issued. , the display control device according to appendix 4, wherein the display control device displays the information on the display means.

(Appendix 6)
The control means includes:
In response to a frame-by-frame advance instruction that instructs frame-by-frame advance for the video, the screen displays the still image based on the still image data of the frame one frame after the currently displayed frame in the video display area. display it on a display means,
In response to a frame-return instruction that instructs frame-return to the video, the screen displays the still image based on the still image data of the frame immediately before the currently displayed frame in the video display area. The display control device according to any one of Supplementary notes 2 to 5, characterized in that the display is caused to be displayed on a display means.

(Appendix 7)
The control means displays the second still image in response to a second still image display instruction that instructs the still image to be displayed in the video display area from among the still images displayed in the frame display area. According to any one of appendices 2 to 6, the display means displays the screen in which the still image instructed by the display instruction is displayed in the video display area based on the still image data. Display control device.

(Appendix 8)
The display control device according to any one of Supplementary Notes 1 to 7, wherein the receiving means receives the still image data of the frame in which the still image is displayed on the screen.

(Appendix 9)
The still image data includes the still image data of which frame of the first video data the still image data belongs to and which frame of the second video data the still image data corresponds to. The display control device according to any one of Supplementary Notes 1 to 8, including identification information indicating whether the device is present.

(Appendix 10)
The receiving means receives list data of the first video data,
The control means causes the display means to display the screen displaying the list of the first video data based on the list data,
The receiving means transmits a playback video generation instruction instructing generation of the second video data in response to an instruction specifying the first video data for generating the second video data. The display control device according to any one of Supplementary Notes 1 to 9.

(Appendix 11)
The amount of data per unit playback time is larger than the second video data used for video display processing in the display control device, and from the first video data regarding the same original video as the second video data, the first video data is generating means for generating still image data of frames included in the video data in units of frames;
A video management device comprising: sending means for sending the generated still image data to the display control device.

(Appendix 12)
The video management device according to appendix 11, wherein the transmitting means transmits the still image data of the frame requested by the display control device to the display control device.

(Appendix 13)
The video management according to appendix 11 or 12, wherein the still image data includes identification information indicating which frame of the first video data the still image data belongs to. Device.

(Appendix 14)
The video management device according to any one of appendices 11 to 13, wherein the generation means generates the still image data when the first video data is registered in the video management device. .

(Appendix 15)
The video management device according to any one of attachments 11 to 13, wherein the generation unit generates the still image data when instructed to generate the second video data.

(Appendix 16)
The video management device according to any one of appendices 11 to 13, wherein the generating means generates the still image data when the second video data is requested.

(Appendix 17)
The video management device according to any one of appendices 11 to 13, wherein the generating means generates the still image data when the still image data is requested.

(Appendix 18)
The video management device according to any one of attachments 11 to 17, wherein the generating means further generates the second video data from the first video data.

(Appendix 19)
19. The video management device according to appendix 18, wherein the generation unit generates the second video data when generation of the second video data is requested from the display control device.

(Additional note 20)
The video management device according to appendix 18, wherein the generation unit generates the second video data when the first video data is registered in the video management device.

(Additional note 21)
A display control device according to any one of Supplementary Notes 1 to 10;
A display control system comprising: a video management device that transmits the second video data and the still image data to the display control device.

(Additional note 22)
The video management device according to any one of appendices 11 to 20;
A display control system comprising: the display control device;

(Additional note 23)
Regarding the same original video as the first video data, second video data having a smaller amount of data per unit playback time than the first video data, and still image data of frames of a predetermined period of the first video data. and receive the
A display control method, comprising: causing a display unit to display a screen displaying a video based on the second video data and a still image based on the still image data.

(Additional note 24)
24. The display control method according to appendix 23, wherein the screen includes a video display area for displaying the video and a frame display area for displaying the still image.

(Additional note 25)
In response to a first still image display instruction that specifies the frame for displaying the still image in the frame display area, the still image is displayed based on the still image data of the frame specified by the first still image display instruction. 25. The display control method according to appendix 24, further comprising causing the display means to display the screen in which the image is displayed in the frame display area.

(Additional note 26)
In response to a stop instruction that instructs the video to pause, the screen displays the still image based on the still image data of the frame corresponding to the stop timing at which the stop instruction was issued, in the video display area. , on the display means.

(Additional note 27)
In response to the stop instruction, the screen on which the still image is displayed in the frame display area based on the still image data of the frame for a predetermined time period from the stop timing at which the stop instruction is issued is displayed on the display means. 27. The display control method according to appendix 26, characterized in that:

(Additional note 28)
In response to a frame-by-frame advance instruction that instructs frame-by-frame advance for the video, the screen displays the still image based on the still image data of the frame one frame after the currently displayed frame in the video display area. display it on a display means,
In response to a frame-return instruction that instructs frame-return to the video, the screen displays the still image based on the still image data of the frame immediately before the currently displayed frame in the video display area. The display control method according to any one of appendices 24 to 27, characterized in that the display is displayed on a display means.

(Additional note 29)
In response to a second still image display instruction that instructs the still image to be displayed in the video display area from among the still images displayed in the frame display area, 29. The display control method according to any one of appendices 24 to 28, further comprising causing the display unit to display the screen in which the still image is displayed in the video display area based on the still image data.

(Additional note 30)
The display control method according to any one of attachments 23 to 29, further comprising receiving the still image data of the frame in which the still image is displayed on the screen.

(Appendix 31)
The still image data includes the still image data of which frame of the first video data the still image data belongs to and which frame of the second video data the still image data corresponds to. 30. The display control method according to any one of appendices 23 to 30, including identification information indicating whether the display is present.

(Appendix 32)
receiving list data of the first video data;
causing the display means to display the screen displaying the list of the first video data based on the list data;
Supplementary notes 23 to 23, characterized in that, in response to an instruction specifying the first video data for which the second video data is to be generated, a playback video generation instruction that instructs the generation of the second video data is transmitted. 32. The display control method according to any one of 31.

(Appendix 33)
The amount of data per unit playback time is larger than the second video data used for video display processing in the display control device, and from the first video data regarding the same original video as the second video data, the first video data is Generating still image data of frames included in the video data in units of frames,
A video management method, comprising: transmitting the generated still image data to the display control device.

(Appendix 34)
34. The video management method according to appendix 33, further comprising transmitting the still image data of the frame requested by the display control device to the display control device.

(Appendix 35)
The video management according to appendix 33 or 34, wherein the still image data includes identification information indicating which frame of the first video data the still image data belongs to. Method.

(Appendix 36)
The video management method according to any one of appendices 33 to 35, wherein the still image data is generated when the first video data is registered in a video management device.

(Additional note 37)
The video management method according to any one of attachments 33 to 35, wherein the still image data is generated when generation of the second video data is instructed.

(Appendix 38)
The video management method according to any one of appendices 33 to 35, wherein the still image data is generated when the second video data is requested.

(Appendix 39)
The video management method according to any one of attachments 33 to 35, wherein the still image data is generated when the still image data is requested.

(Additional note 40)
The video management method according to any one of appendices 33 to 39, further comprising generating the second video data from the first video data.

(Appendix 41)
41. The video management method according to appendix 40, wherein the generation of the second video data is performed when generation of the second video data is requested from the display control device.

(Additional note 42)
The video management method according to appendix 40, wherein the generation of the second video data is performed when the first video data is registered in a video management device.

(Appendix 43)
to the computer,
Regarding the same original video as the first video data, second video data having a smaller amount of data per unit playback time than the first video data, and still image data of frames of a predetermined period of the first video data. a reception function that receives
a computer-readable computer-readable computer-readable computer-readable computer-readable computer-readable computer-readable display device storing a display control program for realizing a control function for causing a display unit to display a screen displaying a video based on the second video data and a still image based on the still image data; recoding media.

(Appendix 44)
44. The computer-readable recording medium recording the display control program according to attachment 43, wherein the screen includes a video display area for displaying the video and a frame display area for displaying the still image.

(Additional note 45)
The control function is configured to display the still image of the frame designated by the first still image display instruction in response to a first still image display instruction that designates the frame in which the still image is to be displayed in the frame display area. 45. A computer-readable recording medium storing a display control program according to appendix 44, wherein the display means displays the screen in which the still image based on the data is displayed in the frame display area.

(Appendix 46)
The control function is configured to display the still image in the video display area based on the still image data of the frame corresponding to the stop timing at which the stop instruction is issued, in response to a stop instruction that instructs the video to pause. A computer-readable recording medium having recorded thereon the display control program according to appendix 44 or appendix 45, wherein the displayed screen is displayed on the display means.

(Additional note 47)
The control function, in response to the stop instruction, displays the screen in the frame display area with the still image based on the still image data of the frame for a predetermined time period from the stop timing at which the stop instruction was issued. A computer-readable recording medium having recorded thereon the display control program according to appendix 46, wherein the display control program is displayed on the display means.

(Additional note 48)
The control function includes:
In response to a frame-by-frame advance instruction that instructs frame-by-frame advance for the video, the screen displays the still image based on the still image data of the frame one frame after the currently displayed frame in the video display area. display it on a display means,
In response to a frame-return instruction that instructs frame-return to the video, the screen displays the still image based on the still image data of the frame immediately before the currently displayed frame in the video display area. A computer-readable recording medium having recorded thereon the display control program according to any one of appendices 44 to 47, characterized in that the program is displayed on a display means.

(Additional note 49)
The control function is configured to display the second still image in response to a second still image display instruction that instructs the still image to be displayed in the video display area from among the still images displayed in the frame display area. According to any one of appendices 44 to 48, the display means displays the screen in which the still image instructed by the display instruction is displayed in the video display area based on the still image data. A computer-readable recording medium that records a display control program.

(Additional note 50)
A computer-readable computer-readable computer storing the display control program according to any one of appendices 43 to 49, wherein the receiving function receives the still image data of the frame for displaying the still image on the screen. recoding media.

(Appendix 51)
The still image data includes the still image data of which frame of the first video data the still image data belongs to and which frame of the second video data the still image data corresponds to. A computer-readable recording medium on which the display control program according to any one of appendices 43 to 50 is recorded, the recording medium including identification information indicating whether the program is present.

(Appendix 52)
The receiving function receives list data of the first video data,
The control function causes the display means to display the screen displaying the list of the first video data based on the list data;
The receiving function is characterized in that, in response to an instruction specifying the first video data for generating the second video data, the receiving function transmits a playback video generation instruction that instructs generation of the second video data. A computer-readable recording medium having recorded thereon the display control program according to any one of appendices 43 to 51.

(Appendix 53)
to the computer,
The amount of data per unit playback time is larger than the second video data used for video display processing in the display control device, and from the first video data regarding the same original video as the second video data, the first video data is a generation function that generates still image data of frames included in the video data in units of frames;
A computer-readable recording medium on which a video management program is recorded, the computer-readable recording medium having a transmission function of transmitting the generated still image data to the display control device.

(Appendix 54)
The computer-readable recording medium recording the video management program according to appendix 53, wherein the transmission function transmits the still image data of the frame requested by the display control device to the display control device. .

(Appendix 55)
The video management according to appendix 53 or 54, wherein the still image data includes identification information indicating which frame of the first video data the still image data belongs to. A computer-readable recording medium that records a program.

(Appendix 56)
The video management program according to any one of appendices 53 to 55, wherein the generation function generates the still image data when the first video data is registered in a video management device. A recorded computer-readable recording medium.

(Appendix 57)
The video management program according to any one of appendices 53 to 55, wherein the generation function generates the still image data when instructed to generate the second video data. Computer-readable recording medium.

(Appendix 58)
A computer readable computer recording a video management program according to any one of appendices 53 to 55, characterized in that the generation function generates the still image data when the second video data is requested. Possible recording medium.

(Appendix 59)
The computer-readable computer-readable computer program recording the video management program according to any one of attachments 53 to 55, wherein the generation function generates the still image data when the still image data is requested. recoding media.

(Additional note 60)
The generation function further generates the second video data from the first video data. recoding media.

(Additional note 61)
Recording the video management program according to appendix 60, wherein the generation function generates the second video data when generation of the second video data is requested from the display control device. computer-readable recording medium.

(Appendix 62)
A computer readable computer recording a video management program according to appendix 60, wherein the generation function generates the second video data when the first video data is registered in a video management device. Possible recording medium.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. The configuration and details of the present invention can be modified in various ways that can be understood by those skilled in the art within the scope of the present invention.

This application claims priority based on Japanese Patent Application No. 2020-088573 filed on May 21, 2020, and the entire disclosure thereof is incorporated herein.

10 display control device 11 reception section 12 control section 20, 40 video management device 21 generation section 22 transmission section 43 storage section 60 display means 90 information processing device 91 communication interface 92 input/output interface 93 arithmetic device 94 storage device 95 nonvolatile storage device 96 Drive device 97 Recording medium

Claims (6)

Regarding the same original video as the first video data, second video data having a smaller amount of data per unit playback time than the first video data, and still image data of frames of a predetermined period of the first video data. and a receiving means for receiving the
A display control device comprising: control means for causing a display means to display a screen displaying a video based on the second video data and a still image based on the still image data. The display control device according to claim 1, wherein the screen includes a video display area that displays the video and a frame display area that displays the still image. 3. The display control device according to claim 1, wherein the receiving means receives the still image data of the frame in which the still image is displayed on the screen. A display control device according to any one of claims 1 to 3,
A display control system comprising: a video management device that transmits the second video data and the still image data to the display control device. Regarding the same original video as the first video data, second video data having a smaller amount of data per unit playback time than the first video data, and still image data of frames of a predetermined period of the first video data. and receive the
A display control method, comprising: causing a display unit to display a screen displaying a video based on the second video data and a still image based on the still image data. to the computer,
Regarding the same original video as the first video data, second video data having a smaller amount of data per unit playback time than the first video data, and still image data of frames of a predetermined period of the first video data. a reception function that receives
A display control program characterized by realizing the following: a control function for causing a display unit to display a screen displaying a video based on the second video data and a still image based on the still image data.

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