JP2011146869A - Video viewing device, and method of controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain the increase of the number of frame images to be displayed during one cycle for viewing a set of a reference image and a sub-image when observing 3D video by a plurality of persons, and to display video smooth in motion. <P>SOLUTION: When one of an image for a left eye and an image for a right eye is used as a reference image and the other image is used as a sub-image, control to display each of a plurality of sub-images once during one cycle for viewing a set of a reference image and a sub-image by a plurality of persons, and to display the reference image by the number of times smaller than the number of times of display of the plurality of sub-images is performed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a video viewing apparatus that enables 3D video viewing and a control method thereof.

  2. Description of the Related Art Conventionally, a stereoscopic image display apparatus using a visual characteristic of recognizing a solid by parallax between left and right eyes is known. In such a stereoscopic image display device, a right-eye image is viewed on the right eye and a left-eye image is viewed on the left eye, thereby enabling pseudo three-dimensional (hereinafter referred to as 3D) video to be viewed. As a viewing method using glasses, a time-division method in which left-eye images and right-eye images are displayed in a time-sharing manner and different images are displayed using left and right shutter glasses has been put into practical use.

  In the time division method, stereoscopic viewing is performed using shutter glasses provided with a left eye shutter and a right eye shutter that can be switched between a transmission state (open state) and a light shielding state (closed state). The left-eye shutter and the right-eye shutter can be opened and closed independently. While the left-eye image is displayed on the display device, the left-eye shutter is opened, the right-eye shutter is closed, and the right-eye image is displayed. When the right-eye shutter is opened and the left-eye shutter is closed, a pseudo 3D image can be viewed.

  As a technique to which the time division method is applied, Patent Document 1 discloses a technique that enables all users to perform stereoscopic viewing even when different stereoscopic images are observed by a plurality of people. Left-eye images and right-eye images input from a plurality of video sources are sequentially displayed, and the left-eye shutter and right-eye shutter of the user's shutter glasses that want to observe each image are controlled in synchronization therewith. By doing in this way, it becomes possible to observe different three-dimensional images by a plurality of people.

  Further, in Patent Document 2, by detecting the tilt of shutter glasses and displaying a sub-image according to the tilt, an object can be viewed from an angle desired by the user, and a more natural stereoscopic image is displayed. Techniques that can be used are disclosed.

JP 2001-75047 A JP 2006-084963 A

  Conventionally, when different stereoscopic images are observed by a plurality of people, the number of users (the number of glasses) is doubled or the video type during one cycle in which all users view a set of reference images and sub-images. It was necessary to display the number of frame images corresponding to twice the number on the display unit. For example, when three people view different videos or display videos according to the viewing environment such as the tilt of shutter glasses used by each of the three people, a set of left-eye and right-eye images for each of the three people Therefore, it is necessary to display six frame images during one cycle. When one user observes a stereoscopic image, if the period of one cycle is T, the period during which one eye (for example, the left eye) of the user observes an image during one cycle is T / 2, and the one eye is an image. The period during which no observation is made is T / 2. During the period when the one eye does not observe the image, the other eye (for example, the right eye) observes the image, and either eye of the right eye or the left eye observes the image during one cycle.

  In contrast, it is assumed that three stereoscopic images are observed by three users and six frame images are displayed in one cycle. In this case, the period when one user's eye (for example, the left eye) observes an image is T / 6, the period when the one eye does not observe the image is 5T / 6, and the period when neither the right eye nor the left eye observes an image is 4T. / 6 exists. Therefore, as the number of frame images to be displayed in one cycle increases, there is a problem that the time during which the user does not observe the video for both the right eye and the left eye increases, and it becomes difficult to observe the smooth motion video.

  Therefore, the present invention suppresses an increase in the number of frame images displayed during one cycle of viewing a set of reference images and sub-images when a plurality of people observe a stereoscopic video, and can display a smooth video. The purpose is to.

  In order to achieve the above object, the video viewing apparatus of the present invention includes a left-eye shutter and a right-eye shutter in accordance with the switching timing of the left-eye image and the right-eye image displayed in a stereoscopic manner on the display unit. A video viewing device in which a plurality of people watch the video on the display unit using a plurality of controlled shutter glasses, wherein either the left-eye image or the right-eye image is a reference image, and the other image is a sub-image. Display control means for performing control to switch and display the reference image common to the plurality of shutter glasses and the plurality of sub-images corresponding to the plurality of shutter glasses on the display unit in a time-sharing manner, and the display unit During the period in which the reference image is displayed, one of the shutters corresponding to the reference image among the left-eye shutter and the right-eye shutter is provided for each of the plurality of shutter glasses. Is in a transmissive state, the other shutter is in a light-shielding state, and the sub-image is displayed on the display unit, the left eye shutter and the right eye shutter among the shutter glasses for each of the plurality of shutter glasses. Shutter control means for controlling one of the shutters corresponding to the sub-image to be in a transmissive state and the other shutter to be in a light-shielded state, and the display control means includes a plurality of reference images In one cycle of viewing a sub-image, the plurality of sub-images are each displayed once, and the reference image is controlled to be displayed less than the number of times the plurality of sub-images are displayed. .

  As described above, according to the present invention, when a stereoscopic video is observed by a plurality of people, an increase in the number of frame images displayed during one cycle is suppressed, and a smooth video can be displayed.

1 is a block diagram illustrating a configuration of a video viewing apparatus according to Embodiment 1. FIG. It is a conceptual diagram of the sub-image according to the inclination angle of the shutter glasses. 6 is a timing chart illustrating the output order of the reference image and the sub-image and a shutter control signal for controlling the operation of the shutter glasses in the first embodiment. It is the figure which showed the output order of the reference | standard image and a subimage. 7 is a block diagram illustrating a configuration of a video viewing apparatus according to Embodiment 2. FIG. FIG. 6 is a timing chart illustrating the output order of reference images and sub-images and shutter control signals for controlling the operation of shutter glasses in Embodiment 2. FIG. It is a figure which shows the section for classifying an inclination angle, and the representative value in each section.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

Example 1
FIG. 1 is a block diagram illustrating a configuration of a video viewing apparatus according to Embodiment 1 of the present invention. In the present embodiment, an example is shown in which three users (user A, user B, user C) are observing the same content during the same period. The right-eye image is a reference image and the left-eye image is a sub-image (the same applies to the following embodiments). During a period in which the reference image is displayed on the display unit, the shutter for the right eye of the shutter glasses is set to the transmissive state and the shutter for the left eye is set to the light shielding state. In addition, during the period in which the sub-image is displayed, the shutter for the right eye of the shutter glasses is in a light shielding state and the shutter for the left eye is in a transmissive state.

  The video viewing apparatus according to the present embodiment includes a video input unit 101, a display control unit 102, a shutter control unit 103, a signal transmission unit 104, a display unit 105, shutter glasses 111 to 113, tilt detection units 121 to 123, and a sub image generation unit. It consists of 131-133. The video input unit 101 receives video stream data constituting 3D video content data. The input video stream data is decoded after receiving a broadcast wave, for example, demodulating, 3D video content data in which video and audio are multiplexed, and content data acquired via the network after TS separation Is obtained. Alternatively, it is read out as video stream data from data stored on a medium such as a DVD. The acquisition method of the video stream data input to the video input unit 101 is not limited to the above-described method or route, and any method or route that can acquire similar video stream data may be used.

  Here, the video stream data includes at least one of reference image data and sub-image data that can be pseudo-stereoscopically viewed. When the video stream data is composed of the reference image data and the sub image data, the reference image data and the sub image data are sequentially displayed on the display unit so that the image can be viewed stereoscopically. For example, when the substream data is not included in the video stream data, the subimage data is generated based on the reference image data. As a method of generating stereoscopically viewable 3D sub-image data from reference image data that is a two-dimensional (2D) image, the reference image data is analyzed, and an object such as an object included in the reference image or the perspective of the background There is a method of generating sub-image data using the parallax amount of each object determined from the feeling. The parallax amount of each object may be obtained from metadata or the like given to the reference image data. The generation method of the sub image data is not limited to the above method, and any method can be used as long as it can generate the sub image data that can be stereoscopically viewed. The video input unit 101 outputs the reference image data to the display control unit 102, and outputs the sub image data to the sub image generation units 131 to 133, respectively.

  The inclination detection units 121 to 123 detect the inclination angles of the shutter glasses 111 to 113, and output the inclination angle information to the sub-image generation units 131 to 133, respectively. In the present invention, the horizontal direction with respect to the installation surface of the video display device is the reference direction. Further, the direction connecting the respective centers of the right eye shutter and the left eye shutter in the shutter glasses is the eye width direction, and the tilt angle of the shutter glasses refers to an angle formed by the reference direction and the eye width direction. A known technique can be used as a method for detecting the tilt angle of the shutter glasses. For example, a sensor for detecting tilt such as a gyro sensor or an acceleration sensor is provided in the shutter glasses, and a sensor signal is received, or the shutter glasses are photographed by the camera, and the frame of the shutter glasses is detected from the photographed image from the reference direction. There are a method for obtaining the tilt angle of the left and right eyes, a method for obtaining the angle between the line connecting the left and right eyes and the reference direction by detecting the positions of the left and right eyes.

  The sub image generation units 131 to 133 use the sub image data acquired from the video input unit 101 and the respective tilt angle information acquired from the tilt detection units 121 to 123 according to the tilt angles of the shutter glasses 111 to 113. Sub-image data is generated. A method of generating sub image data in the sub image generating units 131 to 133 will be described later. The sub image data generated by the sub image generation units 131 to 133 is output to the display control unit 102, respectively.

  The display control unit 102 acquires the reference image data output from the video input unit 101 and the sub image data output from each of the sub image generation units 131 to 133, and switches the reference image and the sub image to time division to display the display unit. To 105. The output order of the reference image and the sub image displayed on the display unit 105 will be described later. A display control signal related to control for switching an image to be output to the display unit 105 is output from the display control unit 102 to the shutter control unit 103. The shutter control unit 103 generates a shutter control signal for controlling the transmission state or the light shielding state of the right eye shutter and the left eye shutter of the shutter glasses 111 to 113 synchronized with the display control signal. The generated shutter control signal is output to the signal transmission unit 104 and used to control the shutter of the shutter glasses.

  Here, a method of generating sub image data in the sub image generating units 131 to 133 will be described. The sub image generation units 131 to 133 generate sub image data using the tilt angle information output by the tilt detection units 121 to 123 that detect the tilt angles of the shutter glasses 111 to 113, respectively. For example, the shutter glasses 111, the shutter glasses 112, and the shutter glasses 113 worn by three users (not shown) are respectively clockwise when viewed from the worn users, and 0 degrees and 45 degrees from the reference direction, respectively. Consider the case of tilting 90 degrees. FIG. 2 shows a conceptual diagram of a sub-image according to the tilt angle of the shutter glasses. A dotted line indicates a reference image, and a solid line indicates a sub-image.

  For example, it is assumed that the parallax amount of a certain object in one set of reference image and sub-image is 10. When the shutter glasses are not tilted with respect to the reference direction (0 degree), as shown in FIG. 2A, the object in the reference image and the object in the sub-image corresponding to each other are A sub-image displayed so as to be shifted in parallel by the amount of parallax 10 is generated. When the shutter glasses are inclined 45 degrees from the reference direction, as shown in FIG. 2B, the object in the reference image and the object in the sub-image corresponding to each other are 45 degrees with respect to the reference direction. Sub-image data that is displayed so as to deviate by an amount of parallax 10 in a direction that forms an angle is generated. When the shutter glasses are inclined by 90 degrees from the reference direction, the object in the reference image and the object in the sub-image corresponding to each other are 90 degrees with respect to the reference direction as shown in FIG. Sub-image data that is displayed so as to be shifted by an amount of parallax 10 in a direction that forms an angle, that is, a direction perpendicular to the reference direction is generated. As the sub image data generation method as described above, the display position of the sub image with respect to the reference image is shifted, or the position of each object included in the image is individually moved according to the inclination angle of the shutter glasses. There is a method for generating sub-image data. As a sub-image to be generated, any method can be used as long as it is an image that can be stereoscopically viewed in a pair with the reference image according to the tilt angle of the shutter glasses. For example, as described in Patent Document 2, a parallax image generated according to the tilt angle of the shutter glasses may be used as the sub image.

  Next, the output order of the reference image and the sub image output to the display unit 105 will be described. FIG. 3 is a timing chart showing the output order of the reference image and the sub-image and the shutter control signal for controlling the operation of the shutter glasses 111 to 113. The sub image generated by the sub image generation unit 131 is sub image A, the sub image generated by the sub image generation unit 132 is sub image B, and the sub image generated by the sub image generation unit 133 is sub image C.

  The images displayed during one cycle in which all three users wearing the shutter glasses 111 to 113 view a set of reference images and sub-images are one reference image common to a plurality of users viewing the video and the sub-images. There are three sub-images of image A, sub-image B, and sub-image C, for a total of four. Therefore, the period during which one image is displayed on the display unit is a maximum of ¼ cycle. During the period in which the reference image is displayed on the display unit 105, the shutter control is performed so that the right-eye shutters of all three shutter glasses 111 to 113 are in the transmissive state and the left-eye shutters are in the light-shielded state. During the period in which the sub-image A is displayed, the shutter for the left eye of the shutter glasses 111 is in a transmissive state, and the shutter for the right eye of the shutter glasses 111 and the shutter for the right eye and the shutter for the left eye of the shutter glasses 112 and 113 are shielded. The shutter is controlled so that During the period when the sub-image B is displayed, the shutter for the left eye of the shutter glasses 112 is in a transmissive state, and the shutter for the right eye of the shutter glasses 112 and the shutter for the right eye and the shutter of the left eye of the shutter glasses 111 and 113 are shielded. The shutter is controlled so that During the period in which the sub-image C is displayed, the shutter for the left eye of the shutter glasses 113 is in a transmissive state, and the shutter for the right eye of the shutter glasses 113 and the shutter for the right eye and the shutter for the left eye of the shutter glasses 111 and 112 are shielded. The shutter is controlled so that

  As shown in FIG. 3, when four images are displayed during one cycle, if one cycle is 1/60 seconds, the display engine for one image is 1/240 seconds. The interval from the time when the user A wearing the shutter glasses 111 observes the sub-image A with the left eye to the time when the reference image is observed with the right eye is 1/240 seconds, and the next cycle with the left eye after observing the reference image with the right eye The interval until the sub image A is observed is also 1/240 seconds. The interval from the time when the user B wearing the shutter glasses 112 observes the sub-image B with the left eye to the time when the reference image is observed with the right eye is 0 seconds. The interval until the image B is observed is 2/240 seconds. The interval from the time when the user C wearing the shutter glasses 113 observes the reference image with the right eye to the time when the sub-image C is observed with the left eye is 0 seconds, and after the sub-image C is observed with the left eye, the right eye performs the next cycle. The interval until the reference image is observed is 2/240 seconds.

  For example, the time interval from the observation of the reference image with the right eye to the observation of the sub-image with the left eye in the same cycle is from the observation of the sub-image with the left eye to the observation of the next one-cycle reference image with the right eye. Within the same time interval, the reference image and the sub-image in the same cycle can be recognized as a set of videos, and stereoscopic viewing is possible.

  In this embodiment, images of one cycle are displayed in the order of sub image A, sub image B, reference image, and sub image C, but they may be displayed in a different order. For example, the sub image A, sub image B, sub image C, and reference image may be displayed in this order. In addition, when the number of viewers increases and the number of sub-images is equal to or greater than a predetermined number, two reference images are used to shorten the time from the observation of the reference image in one cycle until the sub-image is observed as shown in FIG. It may be displayed once. The reference image may be displayed fewer times than the display times of the plurality of sub-images. For example, when there are three or more sub-images, the reference image is displayed twice (two periods) with the sub-image sandwiched in one cycle. For example, when there are four sub-images, one sub-image A, reference image, sub-image B, sub-image C, reference image, sub-image D, one reference image twice in one cycle, The sub-images are displayed once for each image for a period of 1/5 cycle. When the number of viewers increases, if the reference image is displayed only once in one cycle, the time interval at which one user views the reference image and the sub-image will be greatly different, and the reference image in the same one cycle In some cases, the sub-image cannot be recognized as a set of videos. For example, if the time interval from the observation of the reference image to the observation of the sub image in the same cycle is larger than the time interval from the observation of the sub image to the observation of the reference image of the next cycle, Therefore, the sub-image and the reference image in different cycles are recognized as one set of images. Therefore, if the number of times the reference image is displayed during one cycle is increased according to the number of viewers, the user can easily recognize the reference image and the sub-image in the same one cycle as a set of videos, and the correct stereoscopic Visible.

  In this embodiment, the tilt angle of the shutter glasses is detected and a sub-image corresponding to the tilt angle is generated. However, the distance detection unit detects the distance between the shutter glasses 111 to 113 and the display unit 105. And a sub-image corresponding to the detected distance may be generated. The amount of projection of the object in the video changes depending on the distance between the position of the shutter glasses, which is the viewing position, and the position of the display unit. In some cases, the user feels uncomfortable or cannot properly stereoscopically view. Therefore, the user generates a sub-image in which the parallax amount, which is the shift amount of the image in the eye width direction, of the object in the pair of reference images and the sub-image is adjusted according to the distance between the shutter glasses and the display unit, and The stereoscopic effect of the object perceived by the user may be adjusted.

  Further, setting means capable of setting in advance the parallax amount desired by each user may be provided, and a sub-image having a parallax amount that suits each user's preference may be generated to adjust the stereoscopic effect of the object perceived by the user. For example, the setting unit sets the maximum parallax amount and the average parallax amount in the video to be viewed. The sub image generation means changes the parallax amount in the base video according to the maximum parallax amount or the average parallax amount set by the user, and generates a sub image having a parallax amount that suits the user's preference.

  As described above, according to the present embodiment, the number of frame images to be displayed during one cycle is less than the number of frame images required for each of a plurality of persons, that is, two reference images and sub-images. Visualization can be realized. In the present invention, for example, as shown in the above embodiment, a total of four images including one reference image and three sub-images are displayed for three users in one cycle. Assuming that 1 cycle is 1/60 seconds, the period during which one eye (for example, the left eye) of one user observes an image during 1 cycle is 1/240 seconds, and the period during which one eye does not observe an image is 3/240. There is a period of 2/240 seconds in which neither the right eye nor the left eye observes the image. On the other hand, if two reference images and two sub-images are required for each of three users during one cycle, it is necessary to display six images during one cycle. If one cycle is 1/60 seconds as described above, one user's eye (for example, the left eye) observes the image for 1/360 seconds, and the one eye observes the image for 5/360 seconds. In addition, there is a period of 4/360 seconds in which neither the right eye nor the left eye observes the image. As described above, the present invention suppresses an increase in the number of frame images to be displayed during one cycle, thereby suppressing an increase in a period during which the user does not observe both the right eye and the left eye. Display is possible. Further, since the sub-image is generated according to the inclination of the shutter glasses, it is possible to observe the video that matches the viewing environment of each user.

(Example 2)
FIG. 5 is a block diagram showing the configuration of the video viewing apparatus according to Embodiment 2 of the present invention. In this embodiment, four users are assumed, and shutter glasses 411 to 414, inclination detection units 421 to 424, sub-image generation units 431 to 434, and an inclination comparison unit 401 are included. The shutter glasses 411 to 414, the inclination detection units 421 to 424, and the sub image generation units 431 to 434 have the same functions as the shutter glasses 111 to 113, the inclination detection units 121 to 123, and the sub image generation units 131 to 133 in FIG. Have

  When the tilt angle information of the shutter glasses detected by the tilt detection units 421 to 424 is input to the tilt comparison unit 401, the tilt angles are compared to check whether there is any one having the same value. When two or more shutter glasses have the same inclination angle, the inclination angle information output from the inclination comparison unit 401 to the sub-image generation unit is greater than the number of shutter glasses (the number of shutter glasses having the same inclination angle). -1) is reduced. When the tilt angle information of all the shutter glasses is the same, the tilt comparison unit 401 outputs only one tilt angle information. The sub image generation units 431 to 434 generate a sub image corresponding to the tilt angle information output from the tilt comparison unit 401 and output the sub image to the display control unit 102. When the tilt angle information is not input, the sub image is not displayed. Do not generate.

  For example, among the tilt angle information output from the tilt detection units 421 to 424 that detect the tilt angles of the shutter glasses 411 to 414 worn by four users, the tilt angles at the tilt detection units 421 and 422 are the same. It is assumed that the inclination angle in the inclination detection unit 423 is different from the inclination angle in the inclination detection unit 424, and there are three types of inclination angle information. In this case, the inclination angle information output from the inclination comparison unit 401 includes three types of information, that is, the same inclination angle in the inclination detection units 421 and 422, the inclination angle in the inclination detection unit 423, and the inclination angle in the inclination detection unit 424. Consists of tilt angle information. The three types of inclination angle information are output to the sub-image generation units 431 to 433. In the sub image generation unit 431, the sub image corresponding to the inclination angle in the inclination detection units 421 and 422, in the sub image generation unit 432, the sub image in accordance with the inclination angle in the inclination detection unit 423, and in the sub image generation unit 433. Sub-images corresponding to the inclination angles in the inclination detection unit 424 are generated. Since the tilt angle information is not input to the sub image generation unit 434, no sub image is generated. The sub-image generation method is the same as in the first embodiment. The reference image input from the video input unit 101 and the sub images generated by the sub image generation units 431 to 433 are input to the display control unit 102. The display control unit 102 switches the input reference image and sub-image to time division and outputs them to the display unit 105.

  The inclination comparison unit 401 outputs correspondence information indicating which inclination angle information output to each sub-image generation unit is output from which inclination detection unit to the display control unit 102. The display control unit 102 generates a display control signal related to control for switching the image output to the display unit 105 based on the correspondence information output from the inclination comparison unit 401. The generated display control signal is output from the display control unit 102 to the shutter control unit 103. The shutter control unit 103 generates a shutter control signal for controlling the transmission state or the light shielding state of the right eye shutter and the left eye shutter of the shutter glasses 411 to 414 synchronized with the display control signal. The generated shutter control signal is output to the signal transmission unit 104 and used to control the shutter of the shutter glasses.

  FIG. 6 is a timing chart showing the output order of the reference image and the sub-image and the shutter control signal for controlling the operation of the shutter glasses 411 to 414 in the second embodiment. The sub-image generated by the sub-image generation unit 431 is defined as a sub-image D, the sub-image generated by the sub-image generation unit 432 is defined as a sub-image E, and the sub-image generated by the sub-image generation unit 433 is defined as a sub-image F.

  The images displayed during one cycle in which all four users wearing the shutter glasses 411 to 414 view a set of reference images and sub-images are one type of reference image, sub-image D, sub-image E, and sub-image. There are three sub-images of image F, for a total of four. During the period in which the reference image is displayed on the display unit 105, the shutter is controlled so that the right-eye shutters of all four shutter glasses 411 to 414 are in the transmissive state and the left-eye shutter is in the light-shielded state.

  During the period in which the sub-image D is displayed, the shutters for the left eye of the shutter glasses 411 and 412 are set in the transmissive state, the shutter for the right eye of the shutter glasses 411 and the shutter glasses 412, and the shutter for the right eye of the shutter glasses 413 and 414. The shutter is controlled so that the left-eye shutter is in a light-shielding state. During the period in which the sub-image E is displayed, the shutter for the left eye of the shutter glasses 413 is in a transmissive state, the shutter for the right eye of the shutter glasses 413, the shutter for the right eye of the shutter glasses 411, the shutter glasses 412, and the shutter glasses 414, and the left eye. The shutter is controlled so that the shutter is in a light shielding state. During the period in which the sub-image F is displayed, the shutter for the left eye of the shutter glasses 414 is set to the transmissive state, the shutter for the right eye of the shutter glasses 414, the shutter for the right eye of the shutter glasses 411, the shutter glasses 412, and the shutter glasses 413, and the left eye. The shutter is controlled so that the shutter is in a light shielding state.

  In this embodiment, the inclination comparison unit 401 compares whether the inclination angle information in the inclination detection units 421 to 424 is the same. However, the tilt angle information is not limited to be the same, and the tilt angle information is classified into a plurality of sections, and the tilt angle information input to the tilt comparison unit 401 is in the same section. It may be determined whether or not.

  For example, as shown in FIG. 7, the angle range of −90 degrees to 90 degrees with the reference direction set to 0 degree, plus counterclockwise as viewed from the user and minus clockwise is the five angle ranges of sections A to E. To divide. The representative value of each section is, for example, 0 degree in the section of −22.5 to 22.5 degrees, 45 degree in the section of 22.5 to 67.5 degrees, and 90 degrees in the section of 67.5 to 90 degrees. And The inclination angle of the shutter glasses is classified into five sections, and the representative value of each classified section is output from the inclination comparison unit 401 to each sub-image generation unit. Specifically, the tilt angle at the tilt detector 421 is −5 degrees, the tilt angle at the tilt detector 422 is 25 degrees, the tilt angle at the tilt detector 423 is 55 degrees, and the tilt angle at the tilt detector 424 is Suppose that it was 70 degrees. In this case, the four inclination angles are classified into section A, section B, and section C. At this time, the inclination comparison unit 401 outputs three representative values 0 degrees, 45 degrees, and 90 degrees of the sections A, B, and C as inclination angle information to the sub-image generation sections 431 to 433, respectively. The sub-image generation units 431 to 433 generate sub-images according to the input representative values of the tilt angles. However, the sub-image generation units 431 to 433 acquire a sub-image group corresponding to each representative value from the video input unit 101 in advance. A configuration may be employed in which an image corresponding to the input tilt angle is selected from the group and output as a sub-image.

  As described above, according to the present embodiment, as in the first embodiment, the number of frame images to be displayed in one cycle is smaller than that in the case where there are two reference images and sub-images for each of a plurality of people. Stereoscopic viewing can be realized with the number of frame images. Therefore, by suppressing the increase in the number of frame images displayed during one cycle, it is possible to suppress an increase in the time during which the user does not observe the video for both the right eye and the left eye, so that it is possible to display a smooth video. . Further, since the sub-image is generated according to the inclination of the shutter glasses, it is possible to observe the video that matches the viewing environment of each user. Furthermore, since the number of sub-images to be generated is smaller than the number of users when there is the same tilt angle information, it is possible to reduce the load of sub-image generation and display a smooth video.

DESCRIPTION OF SYMBOLS 102 Display control part 103 Shutter control part 104 Signal transmission part 121,122,123 Inclination detection part 131,132,133 Sub image generation part 401 Inclination comparison part

Claims (7)

A plurality of persons use the plurality of shutter glasses whose left-eye shutter and right-eye shutter are controlled in accordance with the switching timing of the left-eye image and the right-eye image displayed in a stereoscopically viewable manner on the display unit. In the video viewing device for viewing the video of
Either the left-eye image or the right-eye image is set as a reference image, the other image is set as a sub-image, and a reference image common to the plurality of shutter glasses and a plurality of sub-images corresponding to the plurality of shutter glasses are displayed. Display control means for performing control to switch and display in time division on the part,
During the period in which the reference image is displayed on the display unit, one shutter corresponding to the reference image among the left eye shutter and the right eye shutter is in a transmissive state for each of the plurality of shutter glasses. While the other shutter is in a light-shielded state and the sub-image is displayed on the display unit, one of the left eye shutter and the right eye shutter corresponding to the sub-image for each of the plurality of shutter glasses Shutter control means for controlling the other shutter to be in a transmissive state and the other shutter to be in a light-shielded state,
The display control means displays each of the plurality of sub-images once each in a cycle in which the plurality of people view a set of reference images and sub-images, and displays the reference images of the plurality of sub-images. A video viewing apparatus characterized by performing control to display a number of times less than the number of times of display.   2. The video viewing apparatus according to claim 1, wherein the display control unit displays the reference image once during one cycle in which the plurality of people view a set of the reference image and the sub-image.   The display control means controls the display to be switched and displayed on the display unit in a time-sharing manner. When the number of sub-images is a predetermined number or more, the plurality of persons view one set of reference images and sub-images in one cycle. The video viewing apparatus according to claim 1, wherein the reference image is displayed twice in between. An inclination detecting means for detecting an inclination angle of each of the plurality of shutter glasses;
Generating means for generating a plurality of sub-images corresponding to the plurality of shutter glasses,
4. The video viewing apparatus according to claim 1, wherein the generation unit generates a sub-image having a parallax amount in each inclination angle direction of the plurality of shutter glasses. Distance detecting means for detecting the distance between each of the plurality of shutter glasses and the display unit;
Generating means for generating a plurality of sub-images corresponding to the plurality of shutter glasses,
4. The video viewing apparatus according to claim 1, wherein the generation unit generates a sub-image having a parallax amount corresponding to a distance between each of the plurality of shutter glasses and the display unit. 5. A plurality of persons use the plurality of shutter glasses whose left-eye shutter and right-eye shutter are controlled in accordance with the switching timing of the left-eye image and the right-eye image displayed in a stereoscopically viewable manner on the display unit. In the video viewing device for viewing the video of
An inclination detecting means for detecting an inclination angle of each of the plurality of shutter glasses;
Inclination comparing means for comparing the inclination angle detected by the inclination detecting means with a predetermined angle range of a plurality of sections, classifying the inclination angles into corresponding sections, and outputting representative values of the classified sections When,
Either the left-eye image or the right-eye image is set as a reference image, the other image is set as a sub-image, and the sub-image having a parallax amount in the direction of the angle corresponding to the representative value output from the inclination comparison unit is Control for generating and generating a reference image common to the plurality of shutter glasses and a sub-image corresponding to the representative value in a time-sharing manner on the display unit, generating means for generating the number of representative values output from the inclination comparing means Display control means for performing,
During the period in which the reference image is displayed on the display unit, one shutter corresponding to the reference image among the left eye shutter and the right eye shutter is in a transmissive state for each of the plurality of shutter glasses. While the other shutter is in a light-shielded state and the sub-image is displayed on the display unit, one of the left eye shutter and the right eye shutter corresponding to the sub-image for each of the plurality of shutter glasses Shutter control means for controlling the other shutter to be in a transmissive state and the other shutter to be in a light-shielded state,
The display control means displays each of the sub-images corresponding to the representative value once each in a cycle in which the plurality of people view a set of the reference image and the sub-image, and displays the reference image as the representative value. A video viewing apparatus that performs control to display a smaller number of times than the number of times of displaying a sub-image corresponding to. A plurality of persons use the plurality of shutter glasses whose left-eye shutter and right-eye shutter are controlled in accordance with the switching timing of the left-eye image and the right-eye image displayed in a stereoscopically viewable manner on the display unit. In the control method of the video viewing apparatus for viewing the video of
Either the left-eye image or the right-eye image is set as a reference image, the other image is set as a sub-image, and a reference image common to the plurality of shutter glasses and a plurality of sub-images corresponding to the plurality of shutter glasses are displayed. A display control process for performing control to switch and display in time division on the part;
During the period in which the reference image is displayed on the display unit, one shutter corresponding to the reference image among the left eye shutter and the right eye shutter is in a transmissive state for each of the plurality of shutter glasses. While the other shutter is in a light-shielded state and the sub-image is displayed on the display unit, one of the left eye shutter and the right eye shutter corresponding to the sub-image for each of the plurality of shutter glasses A shutter control step for controlling the shutter in the transmissive state and the other shutter in the light-shielding state,
The display control step displays the plurality of sub-images once each during one cycle in which the plurality of people view a set of reference images and sub-images, and the reference images are displayed on the plurality of sub-images. A control method for a video viewing apparatus, wherein control is performed to display a display number of times less than the number of times.

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