JP2011139319A - Video viewing device and method for controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to view a video with superimposition display and a video without the display in the same period by suppressing deterioration of viewing environment luminance and reducing flicker or blink, in a time division system video viewing device using shutter type eyeglasses. <P>SOLUTION: A difference video generation part 105 generates data on a first video for the whole screen of a video display part 107 and data on a second video to be displayed in a partial area of the screen in the time division system video viewing device which enables a user to view videos by using the shutter type eyeglasses 150. A control part A 110 controls shutter opening/closing operations of the shutter type eyeglasses 150 according to time division processing via a control signal communication part A 111 and a control signal communication part B 153. A shutter part 152 of the shutter type eyeglasses 150 is controlled to an open state in a display period of the first video, and the shutter part 152 is controlled to a closed state in a display period of the second video. A viewer who wears the shutter type eyeglasses 150 can view the first video, and a viewer who does not wear the shutter type eyeglasses can view the first video and the second video. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a time-division video viewing apparatus using shutter-type glasses and a control method thereof.

There is a technology that makes it possible to view a pseudo three-dimensional (3D) video by using human parallax to show different videos to the left and right eyes of the viewer. When using glasses, the polarization method using polarized light, the spectroscopic method using the difference in color spectrum characteristics, or when the left and right images are displayed in a time-sharing manner, and the left and right eyes are displayed differently using shutter-type glasses. The division method has been put into practical use. Furthermore, a time division / polarization method combining a time division method and a polarization method, and a time division / spectral method combining a time division method and a spectroscopy method have been put into practical use.
A system has been proposed in which a plurality of people can simultaneously view different contents by applying a time-sharing method using shutter-type glasses (see Patent Document 1). In addition, in the technology related to simultaneous viewing, a system has been proposed in which a viewer can selectively view an image obtained by multiplexing an original image and auxiliary information such as captions (see Patent Document 2).

Japanese Patent Laid-Open No. 10-240212 JP 2003-248195 A

  In the system of Patent Document 1, when different contents are simultaneously viewed by applying a time division method using shutter glasses, the shutter opening period of the shutter glasses becomes shorter as the number of contents increases. For this reason, there are problems in that the viewing environment luminance when the viewer visually recognizes the image through the shutter-type glasses decreases, and that flicker and flickering occur. Here, “viewing environment luminance” refers to the brightness of the surrounding environment, not the image luminance displayed on the image display unit.

  Further, the technique of Patent Document 2 can cope with 3D video display by combining techniques of time division and polarization. In this case, a viewer wearing shutter glasses without a polarizing plate views the original image, and a viewer wearing shutter glasses having a polarizing plate views an image in which auxiliary information such as subtitles is multiplexed. It will be. However, in order to switch between viewing the original image and viewing an image in which auxiliary information such as subtitles is multiplexed, it is necessary to attach or remove the polarizing plate to or from the shutter glasses or to change the shutter glasses themselves. become.

  Accordingly, an object of the present invention is to suppress a decrease in viewing environment luminance, reduce flicker and flicker, and to display a video with a superimpose display and a video without the display in a time-division video viewing apparatus using shutter glasses. It is to be able to watch at the same time.

  In order to solve the above-described problems, an apparatus according to the present invention is a video viewing apparatus capable of viewing video displayed by the video display means by time-division processing with shutter-type glasses, and covers the entire screen of the video display means. Controls the shutter opening / closing operation of the shutter-type eyeglasses in accordance with time-sharing processing, and video generation means for generating first video data and second video data displayed in a partial area of the screen of the video display means. Control means are provided. The control means controls the shutter part of the shutter-type glasses to an open state during the display period of the first video, and controls the shutter part of the shutter-type glasses to a closed state during the display period of the second video.

  According to the present invention, it is possible to suppress a decrease in viewing environment luminance and to reduce flicker and flicker. Moreover, viewing of the first video and viewing of the first video and the second video can be performed at the same time.

It is a block diagram which shows the structural example of the video viewing-and-listening apparatus which concerns on one Embodiment of this invention. FIG. 5 is a diagram showing the relationship between video drawing and shutter opening / closing operation in order to explain the first embodiment of the present invention in conjunction with FIGS. 3 and 4. It is the figure which illustrated the visual recognition image at the time of viewing and listening of a video with a caption display, and a video without a caption display. It is a flowchart explaining switching operation | movement of video display mode. FIG. 7 is a diagram showing the relationship between video drawing and shutter opening / closing operations in order to explain the second embodiment of the present invention together with FIG. 6. It is a figure explaining the production | generation method of a shutter opening / closing control signal. It is an image figure explaining video drawing concerning a 3rd embodiment of the present invention.

[First Embodiment] A video viewing apparatus according to a first embodiment of the present invention will be described below. In the first embodiment, with respect to 2D (two-dimensional) video viewing, captions are displayed in 100% white character color as a superimpose. In the case of naked-eye viewing without using shutter-type glasses, the viewer views videos with caption display, and the viewers with shutter-type glasses watch videos without caption display. As for the video display mode described below, a mode in which a video with subtitle display and a video without subtitle display are not viewed at the same time is referred to as a “normal viewing mode”. A mode in which a video with subtitle display and a video without subtitle display are viewed at the same time is referred to as a “simultaneous viewing mode”.

  FIG. 1 is a block diagram illustrating a configuration example of a time-division video viewing apparatus. The time-division video viewing apparatus includes a time-division video display unit 100 and shutter-type glasses 150. The viewer can view the video displayed by the time-sharing process with the shutter glasses, but can also view the display video without using the shutter glasses.

First, the time division video display unit 100 will be described. A tuner unit 102, a descrambler unit 103, a decoder unit 104, a control unit A110, a control signal communication unit A111, and a remote controller (hereinafter abbreviated as a remote controller) receiving unit 112 are connected to each other via a bus so as to be able to send and receive signals. Yes.
The tuner unit 102 demodulates the digital broadcast wave received by the antenna unit 101 into scrambled TS data that is time-division multiplexed including video and audio information for a desired channel, and outputs this to the descrambler unit 103. The descrambler unit 103 decodes the demodulated scramble TS data and outputs the decoded descramble TS data to the decoder unit 104.

  The decoder unit 104 separates the descrambling TS data from the descrambler unit 103 into video data and audio data. The separated video data is sent to the differential video generation unit 105 in the subsequent stage, and the audio data is sent to the audio output control unit 108. That is, among the signals indicating the video data decoded here, a signal indicating the first video (hereinafter referred to as a base video signal) is output to the differential video generation unit 105, and a signal indicating the audio data is the audio output control unit 108. To be processed respectively. The decoder unit 104 decodes the caption data multiplexed in the descrambling TS data, and performs the following processing.

(1) In the simultaneous viewing mode, subtitle data is separated from the base video signal, and a mask video signal is output to the differential video generation unit 105 as subtitle information.
(2) When viewing a video with caption display in the normal viewing mode, a video signal in which captions are multiplexed on the original video is output to the differential video generation unit 105 as a base video signal.
(3) When viewing a video without subtitle display in the normal viewing mode, the base video signal is output to the differential video generation unit 105 without multiplexing the subtitle on the original video.
As the mask video signal in (1) above, caption image data that has been converted to PNG (Portable Network Graphics) format is used. In addition, a video signal in which captions are multiplexed with a specific color (chroma) as a background color may be used so that the difference video generation unit 105 can perform caption extraction based on the chroma key.

The difference video generation unit 105 is a second video (hereinafter referred to as difference video) data drawn in an image area including a caption display portion based on the base video signal and the mask video signal from the decoder unit 104 in the simultaneous viewing mode. Is generated. This difference video is a video indicated by image data generated by subtracting the pixel color of the video signal corresponding to the pixel from the pixel color of each effective pixel of the mask video. The difference video generation unit 105 outputs a base video signal and a signal indicating the difference video (hereinafter referred to as a difference video signal) to the video output control unit 106. In the normal viewing mode, the differential video generation unit 105 outputs only the base video signal to the video output control unit 106 without generating differential video data.
An example of a calculation formula used for generating the difference video is as follows for the effective pixels of the mask video.

  In the above equation, Rd, Gd, and Bd represent the level of the differential video signal, Rm, Gm, and Bm represent the level of the mask video signal, and Rb, Gb, and Bb represent the level of the base video signal. R indicating red, G indicating green, and B indicating blue represent differences in color components, and x and y represent pixel addresses in two-dimensional coordinates. For example, it is assumed that one pixel is expressed in 8-bit gradation for each of R, G, and B color components. The signal levels of certain pixels constituting the subtitle in the mask video are R: 255, G: 255, B: 255, and the signal levels of the corresponding base video pixels are R: 100, G: 150, B: 200. In this case, using the above equation, the signal levels of the corresponding pixels of the generated difference video are R: 155, G: 105, and B: 55.

  The video output control unit 106 converts the base video signal and the differential video signal from the differential video generation unit 105 into drive signals suitable for the video display unit 107 and controls the video display unit 107. The base video is displayed on the video display unit 107 by drive control of drawing over the entire screen (hereinafter referred to as full screen drawing). On the other hand, the difference video is displayed by drive control of drawing in a partial area limited to the caption display area (hereinafter referred to as area drawing). When there is no difference video, the area drawing period is a blanking period.

The video display unit 107 displays, for example, video with caption display when viewing with the naked eye, and displays video without caption display when the shutter-type glasses 150 are used. The full screen drawing and area drawing in the video display unit 107 will be described in detail later together with the operation of the shutter unit 152 described later.
The audio output control unit 108 converts the audio signal from the decoder unit 104 into a drive signal suitable for the speaker unit 109 and causes the speaker unit 109 to output audio.

The remote control unit 121 converts operation information instructed by a user operation into an infrared signal, outputs the signal, and transmits it to the time division video display unit 100. The remote control receiving unit 112 receives an infrared signal from the remote control unit 121 and transmits user operation information to the control unit A110.
The control unit A110 controls the entire time-division video display unit 100 and controls each unit in accordance with a user request received through the remote control reception unit 112. Further, in order to synchronize the display image output from the image display unit 107 and the shutter opening / closing operation of the shutter unit 152 of the shutter-type spectacles 150 described later, the control unit A110 shutters the shutter-type spectacles 150. Generate a control signal. The control signal communication unit A111 modulates the shutter control signal generated by the control unit A110 into an infrared signal and outputs the infrared signal.

  Next, the shutter glasses 150 will be described. The control signal communication unit B153 receives the infrared signal from the control signal communication unit A111, and transmits the shutter control signal demodulated into an electrical signal to the control unit B151. The control unit B151 controls the shutter opening / closing operation of the shutter unit 152 in accordance with the shutter control signal obtained from the control signal communication unit B153. The shutter unit 152 receives the shutter opening / closing control signal from the control unit B151 and performs the shutter opening / closing operation for both the left and right eyes. The operation unit 154 is used for power on / off operation of the shutter-type glasses 150, and transmits operation information to the control unit B151. The control signal communication unit B153 has not only a signal reception function but also a signal transmission function to the control signal communication unit A111 according to specifications.

Next, the relationship between full-screen drawing and area drawing in the video display unit 107 and the shutter opening / closing operation of the shutter unit 152 will be described with reference to FIG. In the first embodiment, an example in which an impulse-type line sequential drive display such as a field discharge display (FED) is used as the video display unit 107 will be described.
In the video display unit 107, in the period of one frame (see reference numeral 301), line sequential scanning is first performed from the upper part to the lower part of the screen, whereby full screen drawing of the base video is performed in the display period of reference numeral 302 (see FIG. (See the arrow marked with A in the circle). Next, when a blanking period of a certain length has elapsed, area drawing of the difference video is performed (see the arrow indicated by B in the circle). That is, the difference video is displayed in the display period 303 by line sequential scanning with a limited scanning area. There is also a blanking period between frames.

  The shutter opening / closing operation of the shutter unit 152 is in an open state during a period 304 and closed in a period 305. The period of reference numeral 304 includes a full-screen drawing period of the base video in the video display unit 107 (see reference numeral 302) and a part of the blanking period before and after the period. The period of reference numeral 305 includes an area drawing period of the difference video (see reference numeral 303) and a part of the blanking period before and after the period. In this way, by switching between opening and closing the shutter within the blanking period, it is possible to prevent the lack of a screen from occurring when viewing the video through the shutter-type glasses.

FIG. 3 shows an example of a display screen by the video display unit 107. The screen shown in the upper left figure (shown with A in the circle frame) shows the base video by full screen drawing, and the screen shown in the upper right figure (shown with B in the circle box) The difference video by area drawing is shown. Further, the screen shown in the lower left shows an example of a video viewed by the viewer when no caption is displayed. When the viewer wearing the shutter-type glasses 150 sees an image without caption display, the visual image is only the base image shown in A. On the other hand, the screen shown in the lower right diagram shows an example of video with captions viewed by a viewer who is not wearing shutter glasses. That is, the visually recognized video is a composite video (A + B) of the base video shown in A and the differential video shown in B, and is a video with captions.
When a viewer who views a video without subtitle display views the video by the time division method using the shutter glasses 150, the shutter is closed as compared to the case of simultaneous viewing using the conventional time division method. (See reference numeral 305) becomes shorter.

Next, switching control and operation between the simultaneous viewing mode and the normal viewing mode will be described using the flowchart of FIG. This process is performed according to a program interpreted and executed by the control unit A110.
In S501, the content type is identified by the decoder unit 104. It is determined whether or not the viewing content is content including subtitle data. If the content includes subtitle data, the process proceeds to S502. If the content includes no subtitle data, the process proceeds to S513.

  In S502, the control unit A110 confirms the subtitle display setting by the user operation, and determines whether or not the setting is for viewing with subtitle display. When the viewing setting with caption display is performed, the process proceeds to S503, and when the viewing setting without caption display is performed, the process proceeds to S513. In S503, the control unit A110 confirms the viewing mode setting by the user operation, and determines whether or not the simultaneous viewing mode is set. In the case of the simultaneous viewing mode, the process proceeds to S504, and in the case of the normal viewing mode, the process proceeds to S510. In S504, the decoder unit 104 outputs the base video signal composed of the original video and the mask video signal generated based on the caption data to the differential video generation unit 105, and the process proceeds to S505. Here, the difference video generation unit 105 generates a difference video signal from the base video signal and the mask video signal from the decoder unit 104, and outputs the signal to the video output control unit 106 together with the base video signal. In next step S506, the video output control unit 106 converts the base video signal and the differential video signal from the differential video generation unit 105 into drive signals suitable for the video display unit 107, and controls the video display unit 107. Thereby, the video display unit 107 displays the base video and the differential video in a time-sharing manner.

  In next step S507, it is determined whether or not the viewer wears the shutter-type glasses 150. For example, whether or not the shutter-type glasses 150 are attached can be notified from the remote control receiving unit 112 to the control unit A110 by operating the remote control unit 121. Alternatively, the shutter-type eyeglasses 150 may be provided with a means for detecting whether or not the shutter glasses 150 are mounted, and a detection signal indicating whether or not the glasses are mounted may be transmitted to the control unit A110 via the control signal communication units B153 and A111. If the viewer wears the shutter glasses 150, the process proceeds to S508, and if not, the process proceeds to S509.

  In S508, the viewer wearing the shutter glasses 150 can view a video without subtitle display. That is, in the shutter-type glasses 150, the shutter unit 152 is controlled to open only during the base video drawing period in accordance with the shutter control signal from the time-division video display unit 100. On the other hand, in S509, a viewer who is not wearing the shutter glasses 150 can view a video with a caption display. That is, the viewer can view a video with caption display, which is a composite video of the base video and the difference video.

  When the process proceeds from S503 to S510, the operation is performed in the normal viewing mode. The decoder unit 104 decodes the subtitle data, multiplexes it with the original video, outputs this as a base video signal to the differential video generation unit 105, and proceeds to S511. Here, the differential video generation unit 105 transmits the base video signal as it is to the video output control unit 106 without generating the differential video signal. The video output control unit 106 converts the base video signal into a drive signal suitable for the video display unit 107 and controls the video display unit 107. Thereby, only the base video with caption display is displayed on the video display unit 107. Then, the process proceeds to S512, and the viewer can view the video with subtitles regardless of whether the viewer uses naked eye viewing without using the shutter glasses 150 or viewing with the shutter glasses 150. In this case, no shutter control signal is output from the time-division video display unit 100 to the shutter glasses 150, and the shutter unit 152 of the shutter glasses 150 remains open.

When the process proceeds from S501 or S502 to S513, the operation is performed in the normal viewing mode. The subtitle data is not decoded by the decoder unit 104 and is not multiplexed with the original video. That is, the original video is output to the differential video generation unit 105 as a base video signal, and the process proceeds to S514. Here, the differential video generation unit 105 transmits the base video as it is to the video output control unit 106 without generating a differential video signal. Then, the video output control unit 106 converts the base video signal into a drive signal suitable for the video display unit 107 and controls the video display unit 107. As a result, only the base video without captions is displayed on the video display unit 107. Then, the process proceeds to S515, and the viewer can view a video without subtitle display regardless of whether the viewer uses naked eye viewing without using the shutter glasses 150 or viewing with the shutter glasses 150. Also in this case, as in S512, the shutter control signal is not output from the time-division video display unit 100 to the shutter glasses 150, and the shutter unit 152 of the shutter glasses 150 remains open.
After the processing in S508, S509, S512, and S515, the above series of processing ends.

  According to the first embodiment, in time-division viewing using shutter-type glasses, since the period during which the shutter is closed is short, it is possible to suppress a decrease in viewing environment luminance and to reduce flicker and flicker. Then, it is possible to view a video with a superimpose display such as subtitles and a video without the display at the same time.

Second Embodiment Hereinafter, a second embodiment of the present invention will be described. The second embodiment relates to 3D video viewing, and can selectively view a video with a superimpose display and a video without the display for each viewer wearing shutter glasses. In the following, subtitles are displayed in 100% white character color as a superimpose, and the video with or without subtitles is selectively displayed by changing the opening time of the shutter unit 152 of each shutter-type glasses. A case of viewing will be described. Note that the configuration of the time-division video viewing apparatus according to the second embodiment is the same as that of the first embodiment. Therefore, the description thereof is omitted, and the differences will be mainly described below.

As a process unique to viewing 3D video, giving a parallax amount to displayed subtitles can be mentioned. The decoder unit 104 generates a left-eye mask video signal and a right-eye mask video signal having a parallax amount, and outputs the mask image signal to the differential video generation unit 105. For the base video signal, the decoder unit 104 outputs the decoded left-eye base video signal and the decoded right-eye base video signal to the differential video generation unit 105.
The differential video generation unit 105 generates a left-eye differential video signal based on the left-eye base video signal and the left-eye mask video signal, and similarly, the right-eye base video signal and the right-eye mask video. Based on the signal, a right-eye difference video signal is generated. Then, the differential video generation unit 105 sequentially outputs the left-eye base video signal and the left-eye differential video signal, the right-eye base video signal, and the right-eye differential video signal to the video output control unit 106.

The video output control unit 106 converts the left-eye / right-eye base video signal and the left-eye / right-eye differential video signal from the differential video generation unit 105 into drive signals suitable for the video display unit 107, and the video display unit 107 is controlled.
The operation unit 154 is used not only for power on / off operation of the shutter-type eyeglasses 150 but also for operation for switching on / off of caption display, and the operation information is transmitted to the control unit B151. With this on / off switching function of subtitle display, the viewer can arbitrarily select whether to view a video with subtitle display or a video without subtitle display for each shutter glasses.

Next, the relationship between full-screen drawing and area drawing in the video display unit 107 and the shutter opening / closing operation of the shutter unit 152 will be described with reference to FIG. The video display unit 107 of the second embodiment also uses an impulse-type line sequential drive display such as FED as in the case of the first embodiment.
The upper part of FIG. 5 shows the drawing state of the screen, the middle part shows the shutter opening / closing operation at the time of video viewing without subtitle display, and the lower part shows the shutter opening / closing operation at the time of video viewing with subtitle display. The period indicated by reference numeral 601 is the period of the left eye video frame, and the period indicated by reference numeral 611 is the period of the right eye video frame.

  The video display unit 107 performs line-sequential scanning from the upper part of the screen toward the lower part during the period of the left-eye video frame (see 601) (see the arrow indicated by AL in a round frame), thereby Display base video. That is, full-screen drawing is performed in the display period indicated by reference numeral 602. Next, after a blanking period of a certain period length, line sequential scanning with a limited scanning area is performed (see the arrow indicated by BL in a round frame), and a left-eye difference image is displayed. That is, area drawing is performed in the display period indicated by reference numeral 603. Then, after the blanking period elapses, the period shifts to the period of the right eye video frame (see 611). By line-sequential scanning from the upper part to the lower part of the screen (see the arrow with AR in the round frame), full-screen drawing of the base image for the right eye is performed in the display period 612. When the blanking period elapses, the area drawing of the right-eye difference video is performed in the display period 613 by line-sequential scanning with a limited scanning area (see the arrow indicated by BR in the round frame). .

  The shutter opening / closing operation of the shutter unit 152 will be described separately for the case without caption display and the case with caption display. First, when the viewer views a video without subtitle display, the left-eye shutter is opened during the period 604. This period includes a full-screen drawing period in which the video display unit 107 displays the left-eye video frame (see reference numeral 602) and a part of the blanking period before and after the period. Further, the left-eye shutter is closed during the period 614. This period includes the area drawing period of the left-eye difference video indicated by reference numeral 603, a part of the blanking period before and after the period, and the period of the right-eye video frame indicated by reference numeral 611.

  On the other hand, the right eye shutter is in the open state during a period 615. This period includes a full-screen drawing period in which the video display unit 107 displays the right-eye video frame (see reference numeral 612) and a part of the blanking period before and after the period. Reference numeral 605 indicates a period other than that, and the right-eye shutter is in a closed state. Thus, the viewer can enjoy the 3D video viewing effect by alternately viewing the left-eye base video and the right-eye base video with their respective eyes.

Next, a case where the viewer views a video with caption display will be described. The left-eye shutter is opened during the display period 601, that is, the period during which the left-eye video frame is displayed on the video display unit 107. The left-eye shutter is opened over the entire screen drawing period of the left-eye base video and the area drawing period of the left-eye differential video. During the period denoted by reference numeral 611, the left eye shutter is closed. The right-eye shutter is opened and closed with a phase opposite to that of the left-eye shutter, and is open during the period 611 and closed during the period 601. That is, the right eye shutter is opened over the entire screen drawing period of the right eye base video and the area drawing period of the right eye difference video, and the right eye shutter is closed during the other periods. Thus, the viewer can enjoy the 3D video viewing effect by alternately viewing the left-eye base video and the left-eye difference video, and the right-eye base video and the right-eye difference video with their respective eyes.
Next, generation processing of a control signal for opening and closing the shutter will be described with reference to FIG. In the uppermost part of FIG. 6, the state of the video output control is expressed using arrows as in FIG. 5, and the shutter control signal is shown below it. The middle row shows the shutter opening / closing control signal when there is no caption display, and the lower row shows the shutter opening / closing control signal when there is no caption display. An upward or downward triangle symbol attached to the rising edge or falling edge of the control signal indicates the edge detection timing of the shutter control signal.

  When viewing the time-division video in the simultaneous viewing mode, whether the shutter glasses 150 operate in the subtitle display mode or the subtitle display mode is determined according to the operation instruction of the operation unit 154. That is, the operation unit 154 has operation buttons and switches for instructing whether or not to display video composition display such as superimpose display. The operation instruction is sent from the shutter-type glasses 150 to the time-division video display unit 100 through the control signal communication units B153 and A111. Control unit A110 determines the mode according to the on / off switching setting of the caption display by the user operation.

  In the case of video viewing without caption display, in the shutter-type glasses 150, the control signal communication unit B153 receives the shutter control signal. The control unit B151 detects a rising edge and a falling edge of the shutter control signal, and generates a shutter opening / closing control signal for the left eye shutter. This control signal is a control signal for opening the left-eye shutter during the period indicated by reference numeral 604 in FIG. As for the shutter opening / closing control signal for the right eye shutter, a delay signal is generated that is delayed by one frame from the shutter opening / closing control signal for the left eye shutter. This control signal is a control signal for opening the right eye shutter during the period indicated by reference numeral 615 in FIG.

  In the case of video viewing with caption display, in the shutter-type glasses 150, the control unit B151 detects the rising edge of the shutter control signal based on the shutter control signal received by the control signal communication unit B153. Then, the control unit B151 generates a rectangular wave signal with a duty ratio of 50% as a shutter opening / closing control signal for the left eye shutter. This control signal is a control signal for opening the left-eye shutter during the period indicated by reference numeral 601 in FIG. As the shutter opening / closing control signal for the right eye shutter, a signal (inverted signal) obtained by inverting the shutter opening / closing control signal for the left eye shutter is generated. This signal is a control signal for opening the right-eye shutter during the period indicated by reference numeral 611 in FIG.

  According to the second embodiment, in addition to the effects of the first embodiment, 3D video with reduced flicker and flickering, that is, 3D video with superimpose display and 3D video without such display can be viewed simultaneously. It becomes.

[Third Embodiment] Hereinafter, a third embodiment of the present invention will be described. In the third embodiment, a hold drive display such as a liquid crystal display (LCD) is used as the video display unit 107, and differences from the first embodiment will be described.
FIG. 7 is an explanatory view exemplifying drawing of a base video and a differential video when a hold drive display is used, and shows a plurality of subframes constituting a video frame. In this example, one frame is composed of three subframes A to C, and a base video is formed by the video of subframes A and B, and a differential video is formed by the video of subframe C. That is, the video output control unit 106 controls the video display unit 107 to draw a base video using the image data of subframes A and B, and draws a differential video using the image data of subframe C. Thus, the video without subtitle display is composed of the composite video of subframes A and B, and the video with subtitle display is composed of the composite video of subframes A, B, and C.
With respect to the base video, flicker, flicker, and afterimage can be reduced by combining the video display time of the base video and the differential video by area division drawing using subframes A and B and increasing the frame rate. In the case of a liquid crystal display, area division drawing with a limited display area is possible by backlight area control.

  According to the third embodiment, even when a hold drive display is used, 2D video with reduced viewing environment brightness and flicker and flicker reduction, that is, video with superimpose display and video without such display are the same. Can be viewed at the time.

100 Time Division Video Display Unit 105 Difference Video Generation Unit 106 Video Output Control Unit 107 Video Display Unit 110 Control Unit A
150 Shutter Type Glasses 151 Control Unit B
152 Shutter unit

Claims (6)

A video viewing device capable of viewing video displayed by the video display means by time-sharing processing with shutter-type glasses,
Video generation means for generating data of a first video over the entire screen of the video display means and data of a second video displayed in a partial area of the screen of the video display means;
Control means for controlling the shutter opening / closing operation of the shutter glasses in accordance with the time-sharing process,
The control means controls the shutter part of the shutter-type glasses to an open state during the display period of the first video, and controls the shutter part of the shutter-type glasses to a closed state during the display period of the second video. A featured video viewing device.   The video that can be viewed through the shutter-type glasses is the first video, and the video that can be viewed without using the shutter-type glasses is the first video and the second video. The video viewing apparatus according to 1. Video output control means for controlling full-screen drawing of the first video and drawing of the second video by time-sharing processing;
The control means is configured to display the first video and the second video when the video synthesis display is instructed by the operating means provided on the shutter-type glasses for instructing the presence or absence of the video synthesis display. The video viewing apparatus according to claim 1, wherein the shutter unit of the shutter-type glasses is controlled to be in an open state. The video output control means alternately outputs the first video and the second video for the left eye and the first video and the second video for the right eye by time division processing,
The control means controls the shutter portion of the shutter-type eyeglasses to be in an open state during the display period of the first video and the shutter type during the display period of the second video when the video synthesis display is not instructed by the operation means. The video viewing apparatus according to claim 3, wherein the shutter part of the glasses is controlled to be closed.   The video generation means generates data of the first video using data of a plurality of subframes constituting a video frame, and uses the data of other subframes constituting the video frame to generate the second video. The video viewing apparatus according to claim 1, wherein data is generated. A method for controlling a video viewing apparatus capable of viewing video displayed by time division processing with shutter-type glasses,
Generating data for the first video over the entire screen and data for the second video displayed in a partial area of the screen;
Controlling the shutter portion of the shutter-type spectacles to an open state during the display period of the first video and controlling the shutter portion of the shutter-type spectacles to a closed state during the display period of the second video according to the time division processing. A method for controlling a video viewing apparatus, comprising:

Images