JP2012222549A - Video display apparatus and video display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video display apparatus and a video display method that are capable of displaying a stereoscopic video with low power while providing the stereoscopic video in high definition even when a large number of parallax images is generated.SOLUTION: A position information acquiring unit 101 acquires position information representing the position of a viewer. A vision range information acquiring unit 102 acquires vision range information representing vision ranges corresponding to plural parallax images constituting a video for stereoscopic view. A specifying unit 103 specifies parallax images including a parallax image that is seen by the viewer, using the position information and the vision range information. An instructing unit 104 instructs a generating unit 105 to generate a parallax video on the basis of information on the parallax images specified by the specifying unit 103. The generating unit 105 generates a video for stereoscopic view on the basis of the parallax video instructed by the instructing unit 104. A display unit 106 displays a stereoscopic video by using the video for stereoscopic view.

Description

  The present invention relates to a video display device and a video display method for displaying a stereoscopic video that can be stereoscopically viewed with the naked eye.

  In recent years, 3D (3D) video technology has attracted attention. When a human sees a three-dimensional object with the naked eye, there is a subtle difference (parallax) between the image seen on the left eye and the image seen on the right eye due to the difference in the positions of the left and right eyeballs. That is, humans see slightly different images (object shapes) between the left and right eyes. When humans see images of different shapes similar to this with their left and right eyes, humans have the property that they feel as if they are seeing a three-dimensional object, even if the object is not actually a three-dimensional object.

  Various methods have been proposed for video display devices capable of displaying a three-dimensional moving image (hereinafter referred to as “three-dimensional display”). In particular, in a three-dimensional display, there is a growing demand for a flat panel type and a system that does not require glasses-type auxiliary optical equipment (hereinafter simply referred to as “stereoscopic glasses”).

  As an example of this method, for example, an optical image selection unit (hereinafter referred to as “light control element”) that controls light from the display panel is installed immediately before a flat panel display (FPD). There is. This method is known as a method that can be realized relatively easily. In general, the light beam control element is called a parallax barrier, a parallax barrier, or the like. For example, a slit (barrier) or a lens array is mainly used as the light beam control element.

  The light beam control element selectively displays an image corresponding to the position of the viewer or the line of sight of the viewer by controlling light beams from the display panel. That is, the light beam control element controls the light beam so that different images are displayed depending on the angle even at the same position on the light beam control element. The video display device including the light beam control element synthesizes and displays a number of images in the line-of-sight direction (hereinafter referred to as “parallax video”) on an image display surface (hereinafter referred to as “screen”) for displaying a two-dimensional image. .

  For example, the following two methods have been proposed as a method for the image display device to synthesize and display a number of images in the line-of-sight direction. The first method is a method of giving optical image selectivity only in the horizontal direction so that the angle of the image is switched in the horizontal direction of the screen. That is, the first method is a method that gives only the left-right parallax (or “horizontal parallax”). Examples of the lens array used in this method include a cylindrical lens array (sometimes referred to as a “lenticular sheet”).

  The second method is a method of giving optical image selectivity in both the horizontal direction and the vertical direction so that the angle of the image is switched in both the horizontal direction and the vertical direction of the screen. That is, the second method is a method of giving vertical parallax (or “horizontal vertical parallax”). Examples of the lens array used in this method include a two-dimensional lens array (sometimes referred to as a “fly-eye lens array”).

  Further, in a multi-view system including a binocular system and a multi-view system, which is one of stereoscopic image display systems, a lens array is arranged in the vicinity of a pixel (or dot) plane. In the multi-view system, the light rays emitted from the lens array are concentrated on the observer's viewpoint.

  Other display methods for stereoscopic video include an integral imaging (II) method and an integral photography (IP) method. In the II system and the IP system, the lens array is arranged in the vicinity on the pixel (or dot) surface, as in the multi-lens system. However, in the II system and the IP system, the lens pitch of the lens array is set to an integer multiple of the pixel (dot) pitch or a value very close to an integer multiple. In the II system or the IP system, the light beams emitted from the lens array are not concentrated on the viewpoint of the observer, but parallel light beams are emitted from the lenses constituting the lens array (see, for example, Non-Patent Document 1). ).

  Patent Document 1 proposes a technique that enables a stereoscopic image to be displayed over a wide range of viewing angles while using the IP method. As a result, the technique of Patent Document 1 solves the problem that as the screen size increases, peripheral portions other than the vicinity of the center of the screen cannot be normally viewed.

JP 2003-287712 A

Chihiro Masuda, “3D Display”, Sangyo Tosho Co., Ltd.

  However, in the configuration of the above prior art, in order to secure a larger number of parallaxes and widen the viewing zone range, it is assumed that the video display device generates parallax images corresponding to a large number of viewing directions. For this reason, in the video display device, as the number of parallax videos increases, the amount of calculation processing increases and there is a problem that the power consumption of the video display device increases.

  An object of the present invention is to provide a video display device and a video display method capable of displaying a stereoscopic video with low power while providing a high-quality stereoscopic video to a viewer even when generating a large number of parallax videos. is there.

  A video display device according to an aspect of the present invention is a video display device that displays a stereoscopic video using a stereoscopic video composed of a plurality of parallax videos, and includes position information indicating a viewer's position. A position information acquisition unit to acquire, a viewing area range information acquisition section to acquire viewing area information indicating a viewing area corresponding to each of the plurality of parallax images constituting the stereoscopic video, and the position information And using the viewing area information, an identifying unit that identifies a parallax image including a parallax image that enters the viewer's eyes, and an instruction to generate a parallax image based on information about the parallax image identified by the identifying unit An instruction unit to perform, a generation unit that generates the stereoscopic video based on the parallax video instructed by the instruction unit, and a display unit that displays the stereoscopic video using the stereoscopic video. The structure which comprises is taken.

  A video display method according to an aspect of the present invention is a video display method for displaying a stereoscopic video using a stereoscopic video composed of a plurality of parallax videos, and includes position information indicating a viewer's position. Using the step of obtaining, the step of obtaining viewing zone information indicating the viewing zone range corresponding to each of the plurality of parallax images constituting the stereoscopic video, and using the position information and the viewing zone range information A step of specifying a parallax image including a parallax image entering the viewer's eyes, a step of instructing the generation of the parallax image based on information on the parallax image specified by the specifying unit, and the specified parallax image And generating the stereoscopic video image and displaying the stereoscopic video image using the stereoscopic video image.

  According to the present invention, the video display device and the video display method can display a stereoscopic video with low power while providing a high-quality stereoscopic video to a viewer even when a large number of parallax videos are generated.

1 is a block diagram showing an example of a configuration of a video display device according to Embodiment 1 of the present invention. The flowchart figure which shows the flow of the video display process which concerns on Embodiment 1 of this invention. The figure which shows an example of the visual field range information which concerns on Embodiment 1 of this invention. The figure which shows an example of the video display process which concerns on Embodiment 1 of this invention The figure which shows an example of the video display process which concerns on Embodiment 1 of this invention The block diagram which shows an example of a structure of the video display apparatus concerning Embodiment 2 of this invention. The flowchart figure which shows the flow of the video display process which concerns on Embodiment 2 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In the following description, the video display device generates a stereoscopic video (image). One stereoscopic image is composed of a plurality of parallax images having different positions or angles. That is, the stereoscopic video is composed of parallax videos in a plurality of viewing directions. In the parallax image configured in this way, different parallax images enter the left and right eyeballs for the same image depending on the viewpoint position of the viewer (the positions of the left and right eyeballs). Thereby, the viewer can obtain a subtle difference (parallax) between the image shown in the left eye and the image shown in the right eye, and can perceive a stereoscopic image.

(Embodiment 1)
FIG. 1 is a block diagram illustrating an example of the configuration of the video display device 100. The video display device 100 is a television, for example.

  In FIG. 1, the video display device 100 includes a position information acquisition unit 101, a viewing area range information acquisition unit 102, a specification unit 103, an instruction unit 104, a generation unit 105, and a display unit 106. When the video display device 100 is a television, the video display device 100 also includes other device units such as a power supply unit, an operation unit, a broadcast receiving unit, a video input / output unit, and an audio input / output unit. Illustration and description are omitted.

  The position information acquisition unit 101 specifies the position of the viewer and acquires position information indicating the position of the viewer. For example, the position information acquisition unit 101 specifies the position (distance, direction, etc.) of the viewer with respect to the video display device 100. Further, the position information acquisition unit 101 may specify the position of the viewer's viewpoint (left and right eyes) as the viewer's position. For example, the position information acquisition unit 101 may specify the position of the viewer by image recognition using a camera (not shown), or may specify the position of the viewer using a sensor (not shown). Good. Examples of the sensor include an ultrasonic sensor, an optical sensor, a stereo camera, and an infrared sensor. Further, the sensor is not limited to this, and it is only necessary to be able to detect the distance and direction (angle) of the viewer with respect to the video display device 100. The position information acquisition unit 101 outputs position information indicating the specified viewer position (for example, the position of the viewpoint) to the specifying unit 103.

  The viewing zone range information acquisition unit 102 outputs a viewing zone range information acquisition request to the generation unit 105 described later, and acquires the viewing zone range information. Then, the viewing zone range information acquisition unit 102 outputs the acquired viewing zone range information to the specifying unit 103. Here, an assumed viewing position (viewing area range) exists in each of the parallax images constituting the stereoscopic video. At a position other than the assumed viewing position of each parallax image, the viewer cannot perceive a 3D image or a crosstalk phenomenon occurs. The viewing zone range information acquired by the viewing zone range information acquisition unit 102 includes information indicating the viewing zone range corresponding to each parallax image. In other words, the viewing zone range information includes information indicating a range (viewing zone range) in which the parallax image can be properly viewed.

  The specifying unit 103 uses the position information input from the position information acquiring unit 101 and the viewing zone range information input from the viewing zone range information acquiring unit 102 to specify a parallax image that enters the viewer's eyes. The specifying unit 103 outputs information including the specified parallax image to the instruction unit 104. The specifying unit 103 may specify a parallax image that does not enter the viewer's eyes (a parallax image other than the parallax image that enters the viewer's eyes) using the position information and the viewing area information.

  The instruction unit 104 instructs the generation unit 105 to generate a video according to the information input from the specifying unit 103. For example, the instruction unit 104 instructs the generation unit 105 to specify a parallax image (image control instruction) that is specified by the specifying unit 103 and enters the viewer's eyes. In addition, the instruction unit 104 issues an instruction (video control instruction) to stop the generation of the parallax video other than the parallax video that enters the viewer's eyes specified by the specifying unit 103 (parallax video that does not enter the viewer's eyes). Do.

  The generation unit 105 generates a stereoscopic video in accordance with the video control instruction from the instruction unit 104. For example, when there is a video control instruction from the instruction unit 104, the generation unit 105 generates a parallax video that enters the viewer's eyes according to the video generation instruction, and stops generating the parallax video that does not enter the viewer's eyes. In addition, when there is no instruction from the instruction unit 104, the generation unit 105 generates all the parallax images that can be generated. Note that the generation unit 105 may use a lenticular lens method, a parallax barrier method, or a method other than these methods as a method for generating a parallax image. The generation unit 105 outputs the generated parallax image group to the display unit 106. Further, when receiving the viewing range information acquisition request from the viewing zone range information acquisition unit 102, the generation unit 105 outputs the generated viewing zone range information regarding the parallax image to the viewing range information acquisition unit 102.

  The display unit 106 displays the parallax image group input from the generation unit 105. Thereby, the viewer can see different parallax images with the left and right eyes. As a result, the viewer can view a stereoscopic image.

  Next, the operation of the video display device 100 will be described.

  FIG. 2 is a flowchart showing an example of the operation of the video display device 100.

  In step (hereinafter referred to as “ST”) 101, position information acquisition section 101 specifies the position of the viewer and acquires position information indicating the position of the specified viewer.

  In ST102, the viewing zone range information acquisition unit 102 acquires the viewing zone range information from the generation unit 105. FIG. 3 shows an example of viewing zone range information acquired by the viewing zone range information acquisition unit 102. The viewing zone range information illustrated in FIG. 3 includes a viewing zone range corresponding to each parallax video (first parallax video to n-th parallax video). In FIG. 3, the viewing zone range is represented by a distance from the video display device 100 and an angle from the video display device 100.

  The “distance from the video display device” shown in FIG. 3 indicates the distance in the front direction from the screen provided in the video display device 100. In addition, the “angle from the video display device” shown in FIG. 3 indicates that the front direction is “0 degrees” with respect to the screen included in the video display device 100, and is between the front direction and the direction in which each parallax video is emitted. Indicates the angle. Moreover, as shown in FIG. 3, the angle from the video display apparatus 100 shows the angle to the left side or the right side toward the front direction from the screen.

  For example, the viewing range of the first parallax image shown in FIG. 3 is a distance of 1.0 m to 2.0 m from the image display device 100, and the angle from the image display device 100 is 15 degrees on the left side (“left 15”). Degree ”). That is, the first parallax video is a “parallax video that enters the viewer's eyes” within the viewing range of the first parallax video shown in FIG. 3. On the other hand, outside the viewing range of the first parallax video shown in FIG. 3, the first parallax video is “parallax video that does not enter the viewer's eyes”. The appearance in the viewing zone range or outside the viewing zone range shown in FIG. 3 is the same for other parallax images.

  In ST103, the identifying unit 103 identifies a parallax image (specific parallax image) that enters the viewer's eyes using the position information acquired in ST101 and the viewing area information acquired in ST102.

  In ST104, instructing section 104 determines whether or not a parallax image entering the viewer's eyes has been identified in ST103. That is, the instruction unit 104 determines whether there is a parallax image that enters the viewer's eyes. When there is a parallax image that enters the viewer's eyes (ST104: YES), the instruction unit 104 causes the generation unit 105 to generate only a parallax image (a specific parallax image) that enters the viewer's eyes. In other words, when there is a parallax video that enters the viewer's eyes (ST104: YES), in ST105, the instruction unit 104 instructs the generation unit 105 to use a parallax video other than the parallax video that enters the viewer's eyes (viewer). Generation of the parallax image that does not enter the eye). Thereby, in ST105, the generation unit 105 generates only the parallax video (specific parallax video) that enters the viewer's eyes.

  On the other hand, when there is no parallax image entering the viewer's eyes (ST104: NO), in ST106, instruction unit 104 does not instruct generation unit 105. In this case, in ST106, the generation unit 105 generates all the parallax images that can be generated.

  The video display device 100 performs the above processing for each pixel constituting the screen included in the video display device 100.

  In ST107, display section 106 displays a parallax video group consisting of the parallax video generated in ST105 or ST106 for each pixel on the screen.

  FIG. 4 shows an example of one pixel (minimum unit constituting an image) in video display. For convenience of explanation, FIG. 4 illustrates an example in which five parallax images are generated per pixel, but the present invention is not limited to this. Here, as shown in FIG. 4, one pixel in the video display is composed of parallax images radiated in five directions ((1) to (5)). That is, one pixel in the video display shown in FIG. 4 corresponds to five pixels of a display panel (for example, a liquid crystal panel). As shown in FIG. 4, these parallax images are radiated in five directions (directions (1) to (5)) by the lenticular sheet. For example, in FIG. 4, the viewer looks at the parallax image radiated in the direction (1) with the right eye and views the parallax image radiated in the direction (2) with the left eye. By doing so, the viewer can view a stereoscopic image due to a subtle difference (parallax) between the images seen by both eyes.

  Next, an example of the operation of the video display apparatus 100 for one pixel shown in FIG. 4 will be described.

  The position information acquisition unit 101 of the video display device 100 specifies the position of the viewer with respect to the video display device 100. For example, in FIG. 4, the position information acquisition unit 101 specifies that the position of the viewer is position A. In this case, the position information includes information indicating the position A.

  Then, the specifying unit 103 enters the viewer's eyes using the position information acquired by the position information acquiring unit 101 and the viewing area information (see, for example, FIG. 3) acquired by the viewing area information acquiring unit 102. Identify parallax images. For example, in FIG. 4, the specifying unit 103 specifies the parallax image emitted in the direction (1) as the parallax image that enters the viewer's eyes located at the position A. In other words, in FIG. 4, the parallax images (directions (2) to (5)) other than the parallax images emitted in the direction (1) for the viewer located at the position A are “entered into the viewer's eyes”. No parallax video ".

  Therefore, the instruction unit 104 instructs the generation unit 105 only to generate a parallax image (direction (1)) that enters the viewer's eyes located at the position A among the five parallax images illustrated in FIG. To do. In addition, the instruction unit 104 stops generating other parallax images (directions (2) to (5)) that do not enter the eyes of the viewer located at the position A among the five parallax images illustrated in FIG. Instruct.

  Thereby, the production | generation part 105 produces | generates only the parallax image radiated | emitted in the direction (1) shown in FIG. 4, and stops the production | generation of the parallax image radiated | emitted in the directions (2)-(5).

  As described above, the video display apparatus 100 generates only the parallax video necessary for the viewer to view the stereoscopic video by specifying the position of the viewer. That is, the video display apparatus 100 stops other parallax video that does not affect the viewing of the stereoscopic video by the viewer. By doing so, the video display device 100 can reduce power consumption while providing high-quality stereoscopic video to the viewer.

  In FIG. 4, one pixel in video display has been described. On the other hand, FIG. 5 illustrates an example of the operation of the video display apparatus 100 with respect to a plurality of pixels (here, 7 pixels). In FIG. 5, as an example, as in FIG. 4, one pixel in video display is composed of five parallax videos. That is, as shown in FIG. 5, each pixel is composed of parallax images emitted in directions (1) to (5).

  In this case, the position information acquisition unit 101 of the video display device 100 specifies the right eye viewpoint position and the left eye viewpoint position of the viewer shown in FIG. That is, the position information acquired by the position information acquisition unit 101 includes the right eye viewpoint position and the left eye viewpoint position of the viewer.

  Next, the specifying unit 103 specifies, for each pixel, the parallax images that respectively enter the viewer's left and right eyes, using the position information and the viewing zone range information. For example, as illustrated in FIG. 5, the specifying unit 103 specifies a parallax image radiated in the direction (5) of the pixel 1 as a parallax image that enters the viewer's right eye. Similarly, the specifying unit 103 specifies the parallax image radiated in the direction (4) of the pixel 2 as the parallax image that enters the viewer's right eye. The specifying unit 103 specifies the parallax image that enters the viewer's right eye in the same manner for the pixels 3 to 5.

  Similarly, as illustrated in FIG. 5, the specifying unit 103 specifies the parallax image radiated in the direction (5) of the pixel 3 as the parallax image that enters the viewer's left eye. Similarly, the specifying unit 103 specifies the parallax image radiated in the direction (4) of the pixel 4 as the parallax image that enters the viewer's left eye. The specifying unit 103 specifies the parallax image that enters the viewer's left eye in the same manner for the pixels 5 to 7.

  Then, as illustrated in FIG. 5, the instruction unit 104 instructs the generation unit 105 to generate only a parallax image that enters one of the left and right eyes of the viewer. That is, as illustrated in FIG. 5, the instruction unit 104 instructs the generation unit 105 to stop generating a parallax image that does not enter any of the viewer's left and right eyes.

  For example, the pixel 4 shown in FIG. 5 will be described as an example. In the pixel 4 illustrated in FIG. 5, the instruction unit 104 instructs the generation unit 105 only to generate two parallax images radiated in the directions (2) and (4), respectively. That is, the instruction unit 104 instructs the generation unit 105 to stop generating three parallax images emitted in the directions (1), (3), and (5). As a result, the video display device 100 reduces power consumption by the amount of three parallax images that do not enter the viewer's eyes (left and right eyes) out of the five parallax images constituting the pixel 4 shown in FIG. be able to. The instruction unit 104 instructs the generation unit 105 to determine whether or not to generate video (generation or stop) in the same manner for other pixels.

  As described above, the video display apparatus according to the present embodiment generates only the parallax video necessary for viewing the stereoscopic video by the viewer according to the position of the viewer. Thereby, the video display apparatus can reduce power consumption, and the viewer can view the stereoscopic video. Therefore, according to the present embodiment, the video display device can display stereoscopic video with low power while providing high-quality stereoscopic video to the viewer even when the number of parallax videos is increased.

  In the present embodiment, the case where the video display device stops parallax video other than the parallax video entering the viewer's eyes has been described. That is, the case has been described in which the video display device sets only the parallax video that enters the viewer's eyes as the specific parallax video that is the generation target of the video display device. However, in the present embodiment, the video display device may generate not only the parallax video entering the viewer's eye but also the parallax video close to the parallax video entering the viewer's eye. That is, the video display device may use the parallax video that enters the viewer's eyes and the parallax video that is close to the parallax video that enters the viewer's eyes as the specific parallax video to be generated by the video display device. In other words, the video display device stops generating the parallax video other than the specific parallax video including the parallax video entering the viewer's eyes and the parallax video entering the viewer's eyes among the plurality of parallax videos. For example, in FIG. 4, a case where the “parallax image entering the viewer's eyes” is a parallax image radiated in the direction (3) will be described. In this case, for example, the video display device radiates not only in the parallax video radiated in the direction (3) but also in the directions (2) and (4) close to the parallax video radiated in the direction (3). A parallax image may also be generated. In this way, the video display apparatus can control the generation of the parallax video in consideration of a slight deviation from the current viewer position. As a result, for example, even if the viewer who was located at the position C shown in FIG. 4 moves his / her neck to come to the position B or the position C, the video display device newly generates a parallax video. Therefore, it is possible to display a stereoscopic image appropriately.

(Embodiment 2)
In the present embodiment, a case will be described in which the video display device predicts the viewer's future position (viewer's destination) using the viewer's past position information.

  FIG. 6 is a block diagram showing an example of the configuration of the video display apparatus according to the present embodiment, and corresponds to FIG. 1 of the first embodiment. In FIG. 6, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. The video display device 200 illustrated in FIG. 6 further includes a prediction unit 201 and a storage unit 202 in addition to the configuration of the video display device 100 illustrated in FIG.

  The prediction unit 201 acquires position information indicating the current viewer position (for example, the viewpoint position) from the position information acquisition unit 101. In addition, the prediction unit 201 acquires position information indicating the positions of past viewers from the storage unit 202 described later. For example, the prediction unit 201 obtains the position information of the past viewer by outputting a request for obtaining the position information of the past viewer to the storage unit 202. Then, the prediction unit 201 predicts the position where the viewer will move next (the movement destination of the viewer) using the current position information and the past position information. For example, the predicting unit 201 predicts a destination to which the viewer will move next by specifying a trajectory of a change in the position of the viewer in time series. Then, the prediction unit 201 outputs the current viewer position information and the position information indicating the predicted destination of the viewer to the specifying unit 203. Also, the prediction unit 201 outputs the current viewer position information to the storage unit 202.

  The storage unit 202 holds viewer position information input from the prediction unit 201. Thereby, the location information of the past viewer acquired by the location information acquisition unit 101 is stored in the storage unit 202. In addition, when a request for acquisition of past position information is input from the prediction unit 201, the storage unit 202 outputs the stored past viewer position information to the prediction unit 201.

  The specifying unit 203 uses the current viewer position information input from the prediction unit 201 and the viewing area information input from the viewing area information acquisition unit 102, and the specifying unit 103 of the first embodiment Similar processing is performed. That is, the specifying unit 203 specifies a parallax video (current specific parallax video) that enters the eyes of the current viewer using the current viewer position information and viewing zone range information.

  Then, in the same way as in the first embodiment, the instruction unit 104 instructs the generation unit 105 of a parallax image that enters the eyes of the current viewer. In addition, the instruction unit 104 instructs the generation unit 105 to stop generating the parallax video other than the parallax video that enters the eyes of the current viewer (parallax video that does not enter the eyes of the current viewer).

  Further, the specifying unit 203 performs the following processing using the position information indicating the viewer's destination predicted by the prediction unit 201 and the viewing area information input from the viewing area information acquisition unit 102. That is, the specifying unit 203 specifies a parallax image (a specific parallax image at the destination) that enters the viewer's eyes at the viewer's destination (predicted viewer position).

  For example, the instruction unit 104 reserves in advance the generation unit 105 to generate a parallax image that enters the viewer's eyes at the predicted viewer's destination. On the other hand, the instruction unit 104 reserves in advance the generation unit 105 to stop generating the parallax video that does not enter the viewer's eyes at the predicted viewer's destination.

  FIG. 7 is a flowchart showing an example of the operation of the video display apparatus 200, and corresponds to FIG. 2 of the first embodiment. In FIG. 7, the same steps as those in FIG. 2 are denoted by the same step numbers, and description thereof will be omitted.

  In ST201, the prediction unit 201 predicts the destination of the viewer using the current viewer position information acquired in ST101 and the past viewer position information stored in the storage unit 202. The prediction unit 201 outputs the current viewer position information and the position information indicating the predicted viewer movement destination to the specifying unit 203. Also, the prediction unit 201 outputs the current viewer position information to the storage unit 202.

  In ST202, the identifying unit 203 obtains the current viewer position information acquired in ST101, the viewer's destination predicted in ST201, and the viewing area information acquired by the viewing area information acquiring unit 102. To perform the following processing. That is, in ST202, the identification unit 203 identifies a specific parallax image including a parallax image that enters the current viewer's eye and a parallax image that enters the viewer's eye at the destination of the viewer.

  In ST203, instructing section 104 determines whether or not there is a parallax video (a specific parallax video at the viewer's destination) that enters the viewer's eyes at the viewer's destination predicted at ST201. . If there is a parallax image that enters the viewer's eyes at the viewer's destination (ST203: YES), the instruction unit 104 proceeds to ST204.

  In ST204, instructing section 104 reserves generation section 105 to stop generating a parallax video other than the parallax video that enters the viewer's eyes at the viewer's destination. Also, in ST204, the instruction unit 104 may reserve the generation unit 105 to generate a parallax image that enters the viewer's eyes at the viewer's destination.

  On the other hand, when there is no parallax image that enters the viewer's eyes at the destination of the viewer (ST203: NO), instruction unit 104 proceeds to ST107.

  In FIG. 7, the video display apparatus 200 performs the processing of ST203 to ST204 (processing related to the position of the viewer's destination) after the processing of ST104 to ST106 (processing related to the current viewer position). However, in the video display apparatus 200, the order of the processing of ST104 to ST106 and the processing of ST203 to ST204 is not limited to this. For example, the video display apparatus 200 may simultaneously perform both the processing of ST104 to ST106 and the processing of ST203 to ST204.

  Here, for example, it is assumed that the video display apparatus 200 has a time lag between the actual acquisition of viewer position information and the determination of whether or not to generate a parallax video.

  For example, it is assumed that the video display device 200 determines that the currently generated parallax video is a parallax video other than the parallax video that enters the viewer's eyes at the predicted destination of the viewer. In other words, the video display apparatus 200 determines that the currently generated parallax video is “a parallax video that does not enter the viewer ’s eyes” at the predicted destination of the viewer.

  In this case, as described above, the video display device 200 reserves in advance to stop the generation of the currently generated parallax video. Thereby, the video display apparatus 200 can stop the generation of the currently generated parallax video at the timing when the viewer actually moves to the predicted destination of the viewer. On the other hand, if the video display device 200 actually acquires the viewer position information and specifies the viewer's destination, the video display device 200 determines the time lag between the specification of the viewer's position and the stop of the parallax video. Will occur. As described above, the video display apparatus 200 can switch from the generation of the parallax video to the stop at a timing before actually acquiring the viewer's position information. Therefore, the video display device 200 can reduce power consumption by the time corresponding to the time lag.

  As described above, the video display apparatus according to the present embodiment predicts whether or not the viewer is likely to change the position of the viewer and determines whether or not to generate the parallax video at the predicted destination of the viewer (generation or stop). Identify. Then, the video display device reserves the process of generating and stopping the parallax video at the viewer's destination at a timing before actually acquiring the viewer's position. As a result, the video display device can execute the processing reserved in advance at the timing when the viewer is actually positioned at the predicted position of the viewer's destination. Therefore, the video display apparatus according to the present embodiment can switch between generation and stop of the parallax video more quickly than in the first embodiment.

  Also, the video display apparatus according to the present embodiment generates only the necessary parallax video according to the position of the viewer, as in the first embodiment. Thereby, the video display apparatus can reduce power consumption, and the viewer can view the stereoscopic video.

  The embodiments of the present invention have been described above.

  In the above embodiment, the case has been described in which the video display apparatus determines whether the generation of the parallax video is possible for each pixel. However, the present invention is not limited to this. For example, the video display device may associate in advance the correspondence relationship between the availability (generation or stop) of parallax video generation in a plurality of pixels and the position of the viewer. For example, the video display apparatus may hold in advance a pattern (generation availability pattern) indicating whether or not a plurality of parallax videos constituting each pixel can be generated. For example, the video display device may associate a plurality of the above-described generation propriety patterns respectively corresponding to position candidates that the viewer can take. In other words, the video display device may specify the viewer's position and determine whether or not the parallax video can be generated in each pixel based on the generation possibility pattern according to the specified viewer position. This eliminates the need for the video display device to determine whether or not to generate a parallax video every time the viewer's position is specified.

  Further, in the above embodiment, as shown in FIGS. 4 and 5, the case where the number of parallax images constituting each pixel is five has been described. However, the number of parallax images constituting each pixel is not limited to five and may be other numbers.

  In the above-described embodiment, the case where the viewer's distance from the video display device and the viewer's angle (direction) from the video display device are used as the viewing area range has been described. However, when the screen size of the video display device is relatively small with respect to the distance of the viewer from the video display device, the viewing zone range may be represented only by the direction from the video display device.

  The video display device and the video display method according to the present invention are a video display device and a video display method that enable viewers to view stereoscopic video using stereoscopic video with high quality and realize power saving. Useful.

DESCRIPTION OF SYMBOLS 100,200 Image | video display apparatus 101 Position information acquisition part 102 Viewing zone range information acquisition part 103,203 Specification part 104 Instruction part 105 Generation part 106 Display part 201 Prediction part 202 Storage part

Claims (7)

A video display device that displays a stereoscopic video using a stereoscopic video composed of a plurality of parallax videos,
A position information acquisition unit that acquires position information indicating the position of the viewer;
A viewing area information acquisition unit that acquires viewing area information indicating a viewing area corresponding to each of the plurality of parallax images constituting the stereoscopic image;
Using the position information and the viewing zone range information, a specifying unit that specifies a parallax image including a parallax image that enters the viewer's eyes;
An instruction unit that gives an instruction to generate a parallax image based on information on the parallax image specified by the specifying unit;
A generating unit configured to generate the stereoscopic video based on the parallax video instructed by the instruction unit;
A display unit for displaying the stereoscopic video using the stereoscopic video;
A video display device comprising: The instruction unit instructs the generation unit only to generate the parallax image specified by the specifying unit.
The video display device according to claim 1. The instructing unit includes a parallax image including a parallax image specified by the specifying unit and a parallax image close to the parallax image specified by the specifying unit among the plurality of parallax images. Only the generation of
The video display device according to claim 1. A storage unit that holds the past location information acquired by the location information acquisition unit;
A prediction unit that predicts a viewer's destination using the current position information acquired by the position information acquisition unit and past position information held by the storage unit;
The specifying unit uses the current viewer's position information, the viewer's movement destination predicted by the prediction unit, and the viewing area information to generate a first parallax that enters the current viewer's eyes. Specifying a parallax video including a video and a second parallax video entering the viewer's eyes at the viewer's destination predicted by the prediction unit;
The instruction unit instructs only the generation of the first parallax image specified by the specifying unit as an instruction to generate the parallax image at the current timing with respect to the generation unit. Instructing only the generation of the second parallax image specified by the specifying unit as an instruction to generate the parallax image at the timing of moving to the destination predicted by the prediction unit,
The video display device according to claim 1. The position information indicates a viewer's viewpoint position.
The video display device according to claim 1. The position information includes a distance from the video display device and an angle from the video display device.
The video display device according to claim 1. A video display method for displaying a stereoscopic video using a stereoscopic video composed of a plurality of parallax videos,
Obtaining position information indicating the position of the viewer;
Obtaining viewing zone range information indicating a viewing zone range corresponding to each of the plurality of parallax images constituting the stereoscopic video; and
Identifying a parallax video including a parallax video entering the viewer's eyes using the position information and the viewing zone range information;
Instructing the generation of parallax video based on information on the parallax video specified by the specifying unit;
Generating the stereoscopic video based on the instructed parallax video;
Displaying the stereoscopic video using the stereoscopic video;
A video display method comprising:

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