JP2009033656A - Video display device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that viewing of a video image with a possibility of damage to health such as a light-hypersensitive attack is restricted uniformly and a viewer is disabled from selecting whether to view or not to view such a video image. <P>SOLUTION: An input video image is inputted to a judging circuit 102, recorded on a recording medium 104 and time-shift played just for the time required for detecting an unwanted video image such as a video image with a possibility of damage to health by the judging circuit 102. If an unwanted video image is detected by the judging circuit 102, the judging circuit 102 controls a display control circuit 105 to control display and superimposes and displays on a display 106 a message indicating the unwanted video image. When a remote control receiving circuit 107 receives a viewing request from a user, the judging circuit 102 controls a recording and playing circuit 103 to time-shift play an original video portion being recorded on the recording medium 104 and controls the display control circuit 105 to display the played-back image as it is without performing display control thereon. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a video display device and a video display method that enable a viewer to select display or non-display of a video when a video that the viewer feels uncomfortable, such as blinking or a repetitive pattern, is detected.

  Conventionally, it has been known that flashing images may induce seizures in people with light sensitivity. Also, in reality, there were incidents that caused epileptic seizures in TV broadcast commercials and animations, which caused viewers to be uncomfortable with blinking more than a predetermined number of times per unit time (hereinafter referred to as blinking video) and repetitive patterns. Guidelines are provided to regulate the broadcasting of video (hereinafter referred to as unfavorable video) that may cause a feeling or cause seizures. For this reason, although the frequency with which an undesirable image | video is broadcast has decreased, the possibility is not zero. Further, since there is no guideline for a package material such as a DVD, an undesirable image can be input to the television.

  Japanese Patent Application Laid-Open No. 2004-228688 proposes an apparatus that controls a display method when an unfavorable video is input, and displays the video in a manner that does not induce a seizure or the like.

The device described in Patent Document 1 includes a determination circuit and a display control circuit, and determines whether the display image may cause a photosensitivity attack by the determination circuit, and causes the photosensitivity attack. When it is determined that there is a risk, the display control circuit performs display control such as displaying a still image, lowering the contrast, and lowering the brightness, thereby preventing the occurrence of a photosensitivity attack.
JP 2006-246138 A

  However, not all people suffer from health hazards due to undesirable images. In addition, even if the video is not desirable for children, there is a possibility that the criteria may differ depending on the audience, such as having no effect on adults. Furthermore, when it is determined that an image with no problem is not preferable due to erroneous detection, there is a possibility that an original image without a problem cannot be seen.

  In view of such circumstances, an object of the present invention is to provide a video display device and a video display method that can achieve both undesirable video display restrictions and viewing of an original video.

  In order to solve the above problems, the first technical means of the present invention inputs a video signal, records and reproduces the video signal, and determines whether the video signal is an unfavorable video. And a display control means for controlling the display of the video signal. The display control means controls the video signal not to be displayed when the judgment means judges that the video is not preferable. A message notifying that the signal is not displayed is displayed, and the video signal is reproduced and displayed from the recording / reproducing means in accordance with a viewing request of the viewer.

  The second technical means inputs a video signal, records / reproduces the video signal, records / reproduces, a judging means for judging whether the video signal is an unfavorable video, and controls the display of the video signal Display control means, and when the judgment control means judges that the video is not desirable, the display control means processes and outputs the video signal and a message notifying that the video signal is processed and displayed. The video signal before being processed is reproduced and displayed from the recording / reproducing means in accordance with a viewing request of the viewer.

  According to a third technical means, in the first or second technical means, the recording / reproducing means performs time-shifted reproduction of a time required for judging an unfavorable video by the judging means, and an undesirable video is detected by the judging means. When there is a viewing request from the viewer, time-shifted reproduction is performed from the unfavorable video.

  According to a fourth technical means, in the first or second technical means, the recording / reproducing means performs time-shifted reproduction of a time required for judging an unfavorable video by the judging means, and an undesirable video is detected by the judging means. When there is a viewing request from a viewer, time-shifted reproduction is performed from a video before the start point of the unfavorable video.

  According to a fifth technical means, in any one of the first to fourth technical means, the judging means judges that the video signal is not preferable when the video signal blinks a predetermined number of times per unit time or more. It is.

  According to a sixth technical means, in any one of the first to fourth technical means, the judging means judges that the video is not preferable when the video signal has a repetitive pattern.

  A seventh technical means is characterized in that, in any one of the first to sixth technical means, a viewing request from a viewer is received within a message display time.

  The eighth technical means is a video display method for recording a video signal on a recording medium, reproducing the video signal from the recording medium, and displaying the video signal. In some cases, the video signal is not displayed, a message notifying that the video signal is not displayed is displayed, and the video signal is reproduced and displayed from the recording medium in accordance with a viewer's viewing request. It is.

  A ninth technical means is a video display method for recording a video signal on a recording medium, reproducing the video signal from the recording medium, and displaying the video signal. In this case, the video signal is processed and displayed, and a message informing that the video signal is processed and displayed is displayed, and the unprocessed video signal is reproduced from the recording medium according to a viewer's viewing request. It is characterized by displaying.

  In a tenth technical means according to the eighth or ninth technical means, the recording / reproducing means performs time-shift reproduction of a time required for determining whether or not the video signal is an unfavorable image, and determines that the image is an unfavorable image. When there is a viewing request from the viewer, time-shifted reproduction is performed from the unfavorable video.

  The eleventh technical means is the eighth or ninth technical means, wherein the recording / reproducing means performs time-shift reproduction of a time required for determining whether or not the video signal is an unfavorable video, and determines that the video signal is not desirable. When there is a viewing request from a viewer, time shift reproduction is performed from a video before the start point of the unfavorable video.

  A twelfth technical means is characterized in that, in any one of the eighth to eleventh technical means, the video signal is determined to be an unfavorable video when blinking a predetermined number of times per unit time.

  A thirteenth technical means is characterized in that, in any one of the eighth to eleventh technical means, an unfavorable video is determined when the video signal has a repetitive pattern.

  In the video display device and the video display method according to the present invention, when an image that is uncomfortable for the viewer, such as a flashing video or a repetitive pattern, is detected, the display control is performed to prevent the occurrence of health damage and The original video recorded on the recording medium can be viewed upon request. Further, even when an image that should be originally displayed is not displayed due to erroneous detection, the original image recorded on the recording medium can be viewed.

  The best mode for carrying out the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the spirit of the present invention.

  The functional block of the video display apparatus of this embodiment is illustrated in FIG. 1 includes a determination circuit 102, a recording / reproducing circuit 103, a recording medium 104, a display control circuit 105, a display 106, and a remote control receiving circuit 107.

Although not shown, a video output device such as a DVD player or a video deck is connected to the video input, and the remote control receiving circuit receives an operation instruction command by the remote control from the viewer.
The operation of the video display device shown in FIG. 1 will be described below.
First, a video signal is input from the outside, and the video signal is input to the determination circuit 102 and the recording / reproducing circuit 103. The determination circuit 102 determines whether the video is a blinking video and whether it is a repetitive pattern. The determination circuit 102 controls the recording / reproducing circuit 103 so that the video signal is delayed by the time required for the determination. That is, the recording / reproducing circuit 103 once records the video on the recording medium 104, reads the video from the recording medium 104 according to the control from the determination circuit 103, and outputs the video to the display control circuit 105. The display circuit control circuit 105 outputs the input video as it is, outputs a single image statically, outputs the video in a reduced size, changes the video frame rate, and outputs a message superimposed. This is possible and operates according to display control from the determination circuit 102. In normal times, the input video is output as it is. The display-controlled video signal is displayed on the display 106.

In the video display device of FIG. 1, the operation when the judgment circuit 102 judges that the video is a blinking video or a repetitive pattern will be described.
When the determination circuit 102 determines that the blinking image or the repetitive pattern is detected, the determination circuit 102 performs display control so that the input image is not output to the display control circuit 105 as it is, and also detects that the blinking image or the repetitive pattern is detected. Control is performed so that an image on which the message shown is superimposed is output to the display 106. When the viewer desires to view the original video, the remote control receiving circuit 107 receives the original video viewing request from the viewer and inputs it to the determination circuit 102. The determination circuit 102 controls the recording / reproduction circuit 103 to reproduce from an undesired video start point, and controls the display control circuit 105 to output the input video as it is, thereby displaying the original video.

  FIG. 2 shows the relationship between the input video and the output video. In FIG. 2, a) is an example of an input video, starting from P1, and unfavorable videos are included in P2 to P3. b) is a judgment output by the judgment circuit 102 as to whether or not the image is unfavorable. Here, the time required for the judgment is t1. c) is an output of the recording / reproducing circuit 103, which outputs an image obtained by time-shifting the input image by t1. d) is an output of the display control circuit 105, and when the determination output result of b) is a normal video, the normal video is output as it is. In the case of an unfavorable video, the display is controlled and output, and a message notifying that the display control has been performed is displayed between the start of the undesirable video and the period t2 after the undesirable video ends. f) and g) are diagrams showing an output video when a viewer requests viewing of the original video. When the viewer requests viewing of the original video at the timing e), the recording / playback circuit 103 outputs the video of f), that is, the original video from P2. Assuming that the time shift time added at this time is t3, the recording / reproducing circuit 103 outputs a video time-shifted by (t1 + t3). From the display control circuit 105, as shown in g), the original image including the unfavorable image is displayed as it is. The viewing request from the viewer can be accepted within the time when the message is displayed.

FIG. 3 shows the operation of the determination circuit 102 in more detail with a flowchart. Here, the values shown in FIG. 2 are used for the time shift times t1 and t3.
First, the time required for determining whether or not the video is unfavorable is t1, and the output of the recording / reproducing circuit 103 is controlled to be delayed by t1 (step S301), and the display control circuit 105 is controlled to output the input video as it is. (Step S302). The determination circuit 102 determines whether or not the input image is an unfavorable image (step S303). If the input image is not desirable, the start position and start time of the unfavorable image are held (step S304), and the display control circuit 105 is displayed. In step S305, the video is processed and output, and a message indicating that the video is processed and displayed is superimposed and output. The procedure for determining that the image is not desirable in step S303 and the procedure for processing and outputting the image in step S305 will be described later. Next, it is determined whether or not the undesired video has ended (step S306), and if it has ended, the end position of the undesired video is held (step S307), the input video is displayed on the display circuit 105 and the undesired video ( Control is performed such that a confirmation message as to whether or not to display (original video) is displayed in a superimposed manner (step S308). When the viewer requests viewing of the original video (step S309), the recording / playback circuit 103 is instructed to perform time-shifted playback for (t1 + t3) time based on the undesirable video start position and disclosure time (step S309). S311). Then, it waits for the completion of the undesirable video reproduction (step S312). If there is no request for viewing the original video, the program waits for a preset time t2 (step S310), and if time-out occurs, the display control circuit 105 is instructed not to output a message (step S313), and the normal display is resumed. Even when there is a request for viewing the original video, after the display of the original video is completed, the process proceeds to step S313 to return to the normal display. In this operation, when there is a request for viewing the original video, time-shifted reproduction for (t1 + t3) time is performed, and when there is no viewing request, time-shifted reproduction for t1 time is continued.

  FIG. 4 shows a block diagram of the determination circuit 102. The determination circuit 102 includes a statistical calculation circuit 401 and a control circuit 402. The statistics calculation circuit 401 calculates the statistics of the input video. The statistics to be calculated are an APL (average screen brightness), a pixel value histogram for each line of brightness and color difference, a pixel value histogram for each screen, and a pixel value histogram in the vertical direction. The control circuit 402 detects a blinking image or a repetitive pattern from the calculated statistics, and determines whether the image is a preferable image. An example of the operation for determining whether or not the video is preferable is shown in the flowchart of FIG.

  In the flowchart of FIG. 5, first, when the APL changes periodically periodically and the unit time changes more than a predetermined number of times, it is determined that the video is not preferable (flashing video) (steps S501 and S503). Further, when the APL is equal to or greater than a predetermined value and the period is equal to or less than the predetermined value, it is defined as a flash. Steps S502 and S503). Further, when there is a periodic pattern in the pixel value histogram for each line of luminance and color difference, or when there is a periodic pattern in the pixel value histogram in the vertical direction, it is determined that the image is not preferable (repetitive pattern) (step S504). , S505). When it is determined that neither the blinking image nor the repetitive pattern is determined, it is determined as a preferable image (step S506).

  Next, the operation of processing and outputting the video shown in step S305 in FIG. 3 will be described in more detail. FIG. 6 shows an output mode in the display control circuit 105. The display control circuit 105 can perform normal output, output OFF, still output, reduced output, and output with a reduced frame rate, and which output mode is used for each of the blinking video and the repetitive pattern is set in advance. For example, in the case of a blinking video, output with a reduced frame rate is performed to reduce blinking, and in the case of a repetitive pattern, the output is turned off. A fixed value may be used for the output mode, or the viewer may be able to change the setting. In step S305, output is performed according to the set output mode.

  With the above-described circuit and operation, it is possible to achieve both an unfavorable video processing display and an original video display according to the viewer's instructions.

<Embodiment 2>
In the first embodiment, when an undesired video viewing request is received from the viewer, playback is performed from the start point of the undesired video. In this embodiment, playback is started before the start point.

  This is shown in FIG. In FIG. 7, f) starts reproduction from t4 hours before the unfavorable video.

  FIG. 8 is a flowchart showing the operation of the determination circuit 102 in this embodiment. The flowchart of FIG. 8 is obtained by changing step S311 of the flowchart of the best embodiment shown in FIG. 3 to step S811, and the other operations are the same as those of the best embodiment. In FIG. 8, the time shift time is (t1 + t3 + t4) in step S811. With this setting, playback is started from a video that is t4 hours before the undesirable video.

<Embodiment 3>
In the first embodiment, input video data is recorded on a recording medium. However, when receiving compressed data, such as when receiving digital broadcasting or receiving a stream by IP retransmission, compressed data is received. Is recorded on a recording medium, the present invention can be realized with a smaller recording capacity.

  FIG. 9 illustrates functional blocks of the invention when receiving compressed data. A video display device 901 shown in FIG. 9 includes a determination circuit 102, a recording / reproducing circuit 903, a recording medium 104, a display control circuit 105, a display 106, and a remote control receiving circuit 107. The best embodiment shown in FIG. 1 and the second embodiment shown in FIG. 9 have different recording / reproducing circuits, but the other blocks are the same. The same blocks are given the same numbers as in the best embodiment, and the description thereof is omitted.

  In the embodiment of FIG. 9, the recording / reproducing circuit 903 includes MPEG2 and H.264. Compressed data encoded in H.264 is input. The recording / reproducing circuit 903 records the compressed data on the recording medium 104 and decodes the compressed data, and inputs the decoded video data to the determination circuit 102. Further, since the video signal is controlled to be delayed by the time (t1) required for determining whether or not the video is unfavorable from the determination circuit 102, the compressed data is read from the recording medium 104 and decoded with a delay of t1. Video data is output to the display control circuit 105.

  In the above-described embodiment, an example in which video data or compressed data is input has been described. However, a video output device such as a DVD player or a video deck may be built in and video data may be generated internally. In addition, an external antenna may be connected, and a digital broadcast tuner may be built in, and compressed data may be generated by the built-in tuner.

It is a figure which shows an example of the functional block of the video display apparatus of embodiment of this invention. It is a figure which shows the relationship between the input image | video and the output image | video in the video display apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the judgment circuit 102 of embodiment of this invention. It is a figure which shows an example of the functional block of the judgment circuit 102 of embodiment of this invention. It is a flowchart which shows the operation | movement which judges whether it is a preferable image | video in the control circuit 402 of embodiment of this invention. It is a figure which shows the output mode of the display control circuit 105 of embodiment of this invention. It is a figure which shows the relationship between the input image | video and the output image | video in the video display apparatus of Embodiment 2 of this invention. It is a flowchart which shows operation | movement of the judgment circuit 102 of Embodiment 2 of this invention. It is a figure which shows an example of the functional block of the video display apparatus of Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Video display apparatus, 102 ... Judgment circuit, 103 ... Recording / reproducing circuit, 104 ... Recording medium, 105 ... Display control circuit, 106 ... Display, 107 ... Remote control receiving circuit, 401 ... Statistics calculation circuit, 402 ... Control circuit, 901: Video display device, 903: Recording / reproducing circuit.

Claims (13)

  Recording / reproducing means for inputting a video signal, recording and reproducing the video signal, judging means for judging whether or not the video signal is an unfavorable video, and display control means for controlling the display of the video signal, The display control means controls not to display the video signal when the judging means determines that the video signal is not preferable, and displays a message notifying that the video signal is not displayed, in accordance with a viewer's viewing request. A video display device for reproducing and displaying the video signal from the recording / reproducing means.   Recording / reproducing means for inputting a video signal, recording and reproducing the video signal, judging means for judging whether or not the video signal is an unfavorable video, and display control means for controlling the display of the video signal, The display control means processes and outputs the video signal when the judgment means determines that the video is not preferable, and displays a message notifying that the video signal is processed and displayed. An image display device, wherein the image signal before processing is reproduced and displayed from the recording / reproducing means according to a request.   3. The video display device according to claim 1 or 2, wherein the recording / reproducing means performs time-shifted reproduction of a time required for judging an unfavorable video by the judging means, and an undesirable video is detected by the judging means. When there is a viewing request from a video display device, the video display device performs time-shifted playback from the undesirable video.   3. The video display device according to claim 1 or 2, wherein the recording / reproducing means performs time-shifted reproduction of a time required for judging an unfavorable video by the judging means, and an undesirable video is detected by the judging means. When there is a viewing request from a video display device, time shift reproduction is performed from a video before the start point of the undesirable video.   5. The video display device according to claim 1, wherein the determination unit determines that the video signal is not preferable when the video signal blinks a predetermined number of times or more per unit time. apparatus.   5. The video display device according to claim 1, wherein the determination unit determines that the video signal is not preferable when the video signal has a repetitive pattern. 6.   7. The video display device according to claim 1, wherein a viewing request from a viewer is received within a message display time.   A video display method for recording a video signal on a recording medium and reproducing and displaying the video signal, and determining whether the video signal is an unfavorable video. A video display method characterized by displaying a message not displaying the video signal without displaying it, and reproducing and displaying the video signal from the recording medium in accordance with a viewing request of a viewer.   A video display method for recording a video signal on a recording medium and reproducing and displaying the video signal, and determining whether the video signal is an unfavorable video. Processing and displaying, displaying a message notifying that the video signal is processed and displayed, and reproducing and displaying the video signal before processing from the recording medium according to a viewing request of a viewer Video display method.   10. The video display method according to claim 8, wherein the recording / reproducing means performs time-shift reproduction for a time required for determining whether or not the video signal is an unfavorable image, determines that the image is an unfavorable image, and receives from a viewer. A video display method characterized by performing time-shifted reproduction from the unfavorable video when a viewing request is made.   10. The video display method according to claim 8, wherein the recording / reproducing means performs time-shift reproduction for a time required for determining whether or not the video signal is an unfavorable image, determines that the image is an unfavorable image, and receives from a viewer. A video display method comprising performing time-shifted playback from a video before a start point of the unfavorable video when a viewing request is made.   12. The video display method according to claim 8, wherein the video signal is determined to be an unfavorable video when the video signal blinks a predetermined number of times per unit time.   12. The video display method according to claim 8, wherein when the video signal has a repetitive pattern, it is determined that the video is not preferable.

Images