Stereoscopic video recording method, stereoscopic video recording medium, stereoscopic video reproducing method, stereoscopic video recording apparatus, and stereoscopic video reproducing apparatus
An object of the present invention is to provide a stereoscopic video recording method, a stereoscopic video recording medium, a stereoscopic video reproducing method, a stereoscopic video recording apparatus, and a stereoscopic video reproducing apparatus that are capable of more optimally performing recording and reproduction of stereoscopic video. According to one solving means of the present invention, a stereoscopic video recording method records, in a recording medium, stereoscopic video including left-eye images (2) and right-eye images (1) utilizing parallax information, by using a stereoscopic video recording apparatus (6). From video content that contains stereoscopic images, the method grasps the amount of variation in parallactic angle having a given or larger value, a variation time that the variation in parallactic angle takes, and the number of times that the variation in parallactic angle occurs. The method then calculates an evaluation value that corresponds to the degree of eye fatigue on the basis of the amount of variation, the variation time, and the number of times of the variation, encodes the video content in such a manner that the evaluation value is within a given range, and records the encoded video content in the recording medium.
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1. Field of the Invention
The present invention relates to a stereoscopic video recording method, a stereoscopic video recording medium, a stereoscopic video reproducing method, a stereoscopic video recording apparatus, and a stereoscopic video reproducing apparatus.
2. Description of the Background Art
With the progress of encoding techniques for compressing digital video signals, it has become possible to implement optical disk apparatuses with excellent searchability and operability by recording compressed video signals to optical disks. Such optical disk apparatuses are free from degradation caused by dubbing, because they record digital video signals instead of analog video signals, and such optical disk apparatuses offer improved reliability because they employ non-contact optical recording and reproduction.
Encoding methods for compressing such digital video signals include the MPEG (Moving Picture coding Experts Group) standards, for example. The MPEG compression offers improved compression efficiency as compared with “intra” compression methods such as motion JPEG, but it still has restrictions due to the use of motion-compensated prediction in the temporal direction; for example, searches can be made only in units of groups of multiple pictures (GOPs), and access on the disk requires accessing an intra-compressed I picture first. Accordingly, Japanese Patent Application Laid-Open No; 2005-260988 (Patent Document 1) suggests a devised data format on an optical disk.
However, the data format of Patent Document 1 has been made only for filing of two-dimensional, flat images. For filing of stereoscopic images, the method of Japanese Patent Application Laid-Open No. 2007-166651 has to be adopted, in which a right-eye image and a left-eye image are separately displayed in the first and second fields of a TV signal, and the two individual field images are viewed by the respective eyes through the use of means such as polarizing eyeglasses.
Viewing stereoscopic (hereinafter referred to also as 3D) video for many hours causes discomforts such as eye fatigue and 3D motion sickness, because the viewer moves the eyes in the focal direction with increased frequency. Three-dimensional viewing will be problematic especially when the point of attention busily moves in the depth direction. Also, in particular, the display of subtitles and the like requires continuously switching the eye focus, and may cause more intense discomforts like eye fatigue and 3D motion sickness than the viewing of ordinary 3D video.
Also, as to the recording of stereoscopic video information, when filing a stereoscopic video that employs parallax between right-eye images and left-eye images on an optical disk, it was not possible to handle a video stream including a mixture of flat (hereinafter referred to also as 2D) images and stereoscopic (3D) images. Particularly, for example, when the display apparatus is switched while the reproducing apparatus is reproducing stereoscopic video, or when a display apparatus is newly connected, information required for 3D display cannot be sent to the display apparatus side in a linked manner, and so the settings in the display apparatus cannot be changed instantaneously.
Also, as to the recording of stereoscopic video information, when filing a stereoscopic video employing parallax between right-eye and left-eye images on an optical disk, there is no video control information that allows recording of broadcasted stereoscopic video and that enables settings in the display apparatus and the reproducing apparatus.
Also, distributed content, such as movies, are usually released at different times, for preferentially releasing businesses such as movie theaters and for the distribution as media, and therefore “code” is provided to limit the region where the movie can be viewed, according to the conditions of distribution of the movie. Also, the distribution of stereoscopic video content is affected by the extent of proliferation of compatible display apparatuses, and it is necessary to further set separate regional restrictions for 3D video and for 2D video. However, conventional systems do not meet such requirements.
Also, it was not possible to superimpose information about the content, copyright information, 3D display scheme information, OSD information, multi-angle information, etc. on a stereoscopic video stream, and therefore it was not possible to instantaneously change the settings on the display apparatus side, not on the reproducing apparatus side.
Also, unlike ordinary 2D video information, 3D video information utilizing parallax includes information for the left-eye and information for the right eye, and the amount of information is doubled and filing efficiency is deteriorated.
Also, while increased eye fatigue occurs during the reproduction of 3D video with an increased degree of three-dimensionality, it was not possible to give a warning to the user in advance according to the degree of three-dimensionality, or to restrict the viewing according to the age of the user. Also, while increased eye fatigue occurs during the reproduction of 3D video with an increased degree of three-dimensionality, it was not possible to alleviate the three-dimensionality of the content on the reproducing apparatus side.
SUMMARY OF THE INVENTIONAn object of the present invention is to provide a stereoscopic video recording method, a stereoscopic video recording medium, a stereoscopic video reproducing method, a stereoscopic video recording apparatus, and a stereoscopic video reproducing apparatus that are capable of more optimally performing recording and reproduction of stereoscopic video.
A stereoscopic video recording method according to the preferred embodiment of the present invention records, in a recording medium, stereoscopic video including left-eye and right-eye images utilizing parallax information. From video content that contains stereoscopic video, the stereoscopic video recording method of the invention grasps the amount of variation in parallactic angle having a given or larger value, a variation time that the variation in parallactic angle takes, and the number of times that the variation in parallactic angle occurs. The method then calculates an evaluation value that corresponds to the degree of eye fatigue on the basis of the amount of variation, the variation time, and the number of times of the variation, encodes the video content in such a manner that the evaluation value is within a given range, and records the encoded video content in the recording medium.
The stereoscopic video recording method of the preferred embodiment of the present invention calculates an evaluation value that corresponds to the degree of eye fatigue on the basis of the amount of variation, the variation time, and the number of times of the variation, and encodes the video content in such a manner that the evaluation value is within a given range. It is thus possible to produce video content that only involves eye fatigue limited within a certain range and to provide the video content to users.
A stereoscopic video reproducing method according to the preferred embodiment of the present invention reproduces stereoscopic video including left-eye and right-eye images utilizing parallax information. According to the stereoscopic video reproducing method of the invention, a recording medium records video content that includes stereoscopic video and that is encoded in such a manner that a maximum parallactic angle value grasped from the video content is not more than a given value, and the stereoscopic video reproducing method reads the maximum parallactic angle value from the recording medium, and displays the maximum parallactic angle value when a user views the video content so that the user can recognize the maximum degree of three-dimensionality of the stereoscopic video.
The stereoscopic video reproducing method of the preferred embodiment of the present invention displays the maximum parallactic angle value so that the user can recognize the maximum degree of three-dimensionality of the stereoscopic video when viewing the video content, and it is thus possible to objectively grasp the influence of the stereoscopic video on the user.
A stereoscopic video recording apparatus according to the preferred embodiment of the present invention includes one video generating block provided for one of the left and right eyes and another video generating block provided for the other eye, or includes one video generating block that is operated at a doubled rate. Each of the one and another video generating blocks, or the one video generating block, includes: an AD converter that digitizes a video signal of video content that contains stereoscopic video; a motion detecting circuit that detects motion vectors necessary to video-compress the digitized video signal in a temporal direction; a DCT transform circuit that applies DCT transform necessary for intra-compression to the digitized video signal; an adaptive quantization circuit that applies quantization necessary for intra-compression to the DCT-transformed video signal; a variable-length coding circuit that applies variable-length coding necessary for intra-compression to the quantized video signal; and an inverse quantization circuit and an inverse DCT transform circuit that decode the quantized video signal as a local decoder. The stereoscopic video recording apparatus of the invention records the video content and its supplementary information in a recording medium, wherein the video content is composed of digital video information including an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from the I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from the I or P picture in a preceding/following direction in time, and in the video content, flat and stereoscopic images in units of the digital video information or an integral multiple of the digital video information exist in a mixed manner, and form a temporally continuous video unit.
The stereoscopic video recording apparatus of the preferred embodiment of the present invention includes video generating blocks for left-eye images and for right-eye images, or one video generating block that is driven at a doubled rate, and the apparatus is capable of obtaining appropriate stereoscopic images.
A stereoscopic video reproducing apparatus according to the preferred embodiment of the present invention reproduces a recording medium that records video content and supplementary information, wherein the video content is composed of digital video information including an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from the I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from the I or P picture in a preceding/following direction in time, and in the video content, flat images and stereoscopic images utilizing parallax information in units of the digital video information or an integral multiple of the digital video information exist in a mixed manner, and form a temporally continuous video unit. The stereoscopic video reproducing apparatus of the invention includes: a system decoder that separates a video stream containing video audio data from a signal read from the recording medium; a compressed-video decoder that decompresses compressed video of the separated video stream; an audio decoder that decompresses compressed audio of the separated video stream; an OSD decoder that extracts OSD information that contains subtitle display from the supplementary information; a depth generating circuit that generates a depth-direction location of the OSD information from the supplementary information; a stereoscopic video processing circuit that generates the stereoscopic images from the video information decompressed by the compressed-video decoder; and a blending circuit that superimposes the OSD information on the stereoscopic images.
The stereoscopic video reproducing apparatus of the preferred embodiment of the present invention considers the location of OSD information in the depth direction when superimposing the OSD information on stereoscopic images, and it is thus possible to further alleviate the eye fatigue caused by the viewing of the OSD information and stereoscopic images.
These and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
A first preferred embodiment of the present invention will now be described referring to the drawings.
Now, as shown in
As shown in
The system shown in
In the system of
In another scheme for directing left and right images to the corresponding eyes, the synchronous rotating member 13, which rotates in synchronization with the timing of TV field display, is composed of optical filters that pass only particular wavelengths of RGB, one half of the disk being allocated for the left eye and the other half for the right eye, and the respective RGB wavelengths are shifted to vary the light wavelengths for the right eye and the left eye. Also, the eyeglasses 7 are composed of optical filters that respectively pass only the right-eye and left-eye wavelengths. In this case, it is possible to correct the shifts of RGB on the left and right by color control on the TV display side, so as to obtain satisfactory color reproduction. This scheme, in which RGB wavelengths are shifted on the left and right, is free from attenuation of the light from the eyeglasses 7 even when the eyeglasses are tilted.
In the system using the rotary mirror 21 as shown in
Next, an actual stereoscopic view will be described. Reproduced video images utilizing parallax are perceived as shown in
As shown in
As to the degree of eye fatigue, larger-sized screens require increased eye movements in the plane direction and therefore cause increased eye fatigue. Two evaluation functions are possible accordingly, one with screen-size consideration and the other with no screen-size consideration. First, with an evaluation function 1, a value “a” at which the eyes' following movements can be ignored<parallactic angle variation speed of a point of attention<a range “b” of the eyes' following movements, and the evaluation value (the degree of eye fatigue) is proportional to the value of “parallactic angle variation speed×variation time×the number of times”. With an evaluation function 2, a value “a” at which the eyes' following movements can be ignored<parallactic angle variation speed of a point of attention<a range “b” of the eyes' following movements, and the evaluation value (the degree of eye fatigue) is proportional to the value of “parallactic angle variation speed×variation time×the number of times×screen size”. The evaluation function 2 is used when the TV screen size is detectable, and the evaluation function 1 is used when it is not detectable. In the second and following preferred embodiments, the evaluation value (the degree of eye fatigue) is described as the degree of depth variation.
In the production of one piece of stereoscopic video, “the amount of variation of parallactic angle”, “the time that the variation takes”, and “the number of times that the variation occurs” are provided as evaluation factors for the stereoscopic video in that one piece of video content, and it is then possible to make stereoscopic video content by re-encoding it such that the value does not enter the dangerous region 131 of
As to the display of subtitles that the user necessarily has to read to understand the story of the movie or the like, it is necessary to place a limitation on the amount of depth-direction variation as shown in
It is then possible to define stereoscopic video parental levels based on the above-described evaluation value and the maximum amount of protrusion that corresponds to the viewing angle, and then an age limit for viewing may be set, or a warning against danger may be given to elderly or sick people, according to the stereoscopic video parental level. For example, the stereoscopic video parental levels may include Level 1 indicating severe fatigue and danger, with the evaluation value (the degree of eye fatigue)>c, the amount of maximum protrusion>d, and the ordinary parental level being high. Level 2 would indicate relatively severe fatigue and danger, with the evaluation value (the degree of eye fatigue)>c, the amount of maximum protrusion>d, and the ordinary parental level being normal or lower, or with the evaluation value (the degree of eye fatigue)>e, the amount of maximum protrusion>f, and the ordinary parental level being high. Level 3 would indicate intermediate fatigue and danger, with the evaluation value (the degree of eye fatigue)>e, the amount of maximum protrusion>f, and the ordinary parental level being normal or lower. Level 4 would indicate no fatigue and no danger, with the evaluation value (the degree of eye fatigue)>g, the amount of maximum protrusion>h, and the ordinary parental level being normal or lower.
In the above-described example of stereoscopic video parental levels, there is a relation of c>e>g and a relation of d>f>h, and the ordinary parental levels (flat-video parental levels) indicate the restrictions on viewing for ensuring safety that are defined about horror movies and the like in existing 2D video DVDs etc. It will be useful when the setting of such stereoscopic video parental levels can be determined or changed at the time of purchase or at the time of initialization, and can be cancelled and changed at a later time by using an identification number etc.
Second Preferred EmbodimentNext, a second preferred embodiment will be described referring to the drawings. When stereoscopic images utilizing parallax information, as shown in
Now, as shown in
It is desired that supplementary information regions about the video information stream of the video title 24 be provided also on the video information stream, so as to allow access to the information, management of the information, switching of settings of equipment, etc. In particular, when content includes a mixture of 2D and 3D video streams, it is necessary on the TV side to detect whether the video stream is 2D or 3D. When supplementary information regions are provided on the stream, the settings on the TV side can be readily and automatically changed on the basis of the information. When a player/recorder for reproducing/recording a recording medium controls all settings in a closed manner, it will be satisfactory to describe the control information only in the video control information 23 where the control information is collectively recorded in a part of the disk. However, when it is connected to a TV, especially when the TV is switched in the course of reproduction, superimposing necessary minimum control information on the video information itself allows the settings on the TV side to be automatically switched. When such control information is absent in the video information, the procedure requires detecting the switching of TV, separately sending control information from the player/recorder, changing the settings on the TV side, and then sending the video information. Needless to say, as to the change of settings on the TV side, it is necessary to provide a mechanism for quickly changing the settings of the display apparatus, since the stereoscopic video reproduction processing itself, like the switching of polarized light, is conducted on the display apparatus side.
The supplementary information 51 can be used also for access and management of information, and it has become established as Navi information in DVD standards. When both 2D video and 3D video exist in a mixed manner, they exist in parallel in the time sequence of the content, as shown by the 3D video information 29 and 2D video information 30 and 31 in
In the case of video information data that is compressed also in the temporal direction, such as by MPEG, the information exists in units of GOP information having an I picture at the beginning, and therefore access to the video data has to be made in units of GOP video information. Also, the supplementary information, which has to be read in the first place, should be located at the head of the GOP video information group. For example, when a 3D video information portion is reproduced as shown in
At the picture layer underneath, the supplementary information 51 at the beginning of GOP video information is located before the I picture 57. Also, in the lowermost-layer data, the compressed video data is divided into transport packets 60, 61 as shown in
The contents of the supplementary information will be described in more detail. The supplementary information 51 shown in
The time code information region 65 shown in
Now, the supplementary information 51 shown in
Next, the content information 64 shown in
The copyright information 71 shown in
The encryption information 72 shown in
The 3D video information 73 shown in
The available region 74 shown in
Next, the time code information 65 shown in
Also, 3D video is likely to cause eye fatigue etc. as described in the first preferred embodiment. Accordingly, it is possible to give an instruction to take a break to prevent eye fatigue, or to warn about the danger, by displaying a time code from the start of 3D video reproduction (how long 3D video has been viewed continuously), or by displaying how long 3D video has been viewed in total in this video content. Also, when there are right-eye and left-eye GOP video information for 3D, it is possible to make field designation corresponding to the order of reproduction. That is, the presentation time 65A describes (18) a time code from the start of the title (presentation time), (19) information about the remaining time to the end of the reproduction of the title, or a total title reproduction time, (20) a time code from the start of 3D video reproduction (3D presentation time), (23) total 3D reproduction time, and (24) the order of reproduction of right-eye and left-eye images or field designation. The synchronization information 65B defines the synchronization of the video content, by the order of reproduction of right and left images or by field designation.
Next, the location information 66 shown in
The angle information 77 records (29) GOP video information address 1, address 2, etc. that correspond to a plurality of angles, and (30) time code information 1, time code information 2 etc. about the GOP video information corresponding to a plurality of angles. The in-GOP location information 78 records (31) address information 1, address information 2 etc. as location information about P pictures in each GOP. Thus, the presence of the seamless information 75 enables sequential reproduction by connecting necessary angles, and the location information in GOPs enables fast forward and fast reverse reproduction by reproducing I pictures only or I and P pictures only.
Next, the video information 67 shown in
The number of 3D video information 87 records (37) the number of independent 3D video information streams that are reproduced in parallel. . When there are n different angles, it is described as n=angle number. On the basis of this information, the number of angles is displayed during reproduction, and it is possible to switch the angle by user selection, and to recognize the angle numbers through display. The number of 3D video information 87 also records (38) the number of video streams and camera information about right and left images that are sequentially switched. For example, as shown in
When there are five video streams with shifted parallaxes, it is possible, as shown in
The depth resolution 88 records (39) 3D video depth resolution 1, resolution 2, etc. When there are a plurality of 3D video streams, it describes a plurality of depth-direction resolutions. For example, in CG video, when the depth resolution is extremely low and the image does not move smoothly in time, the depth can be complemented in the temporal direction on the basis of this information so as to produce smooth display. The degree of depth variation 89 records (40) the degree of 3D video depth variation 1, the degree of variation 2, etc. When there are a plurality of 3D video streams, a plurality of depth-direction variation degrees are described. In particular, the degree of variation is closely related to the fatigue of human eyes as described in the first preferred embodiment, and it is recorded to ensure safety, and can be utilized to give a warning to the user, or to instruct the user to take a break, for example.
The permitted subtitle depth 90 records (41) the range of permitted subtitle depths (maximum viewing angle 1, minimum viewing angle 1, maximum viewing angle 2, minimum viewing angle 2, etc.). When there are a plurality of 3D video streams, a plurality of depth-direction variation degrees are described. Subtitle information is likely to affect eye fatigue, because the focus must be frequently adjusted alternately to the subtitles' focus position and the point of attention during the viewing of stereoscopic video as described later, and it is therefore necessary to sufficiently limit the range of display. Also, when the depth information is described in terms of real distance, it is difficult to represent it in numerical form because the far side is at an infinite distance, and therefore it is desirable to describe it in terms of viewing angle information. Also, it has no meaning to represent near-infinite distances with detailed numerals, and therefore a lower limit may be set, e.g. by omitting viewing angles of 1 degree or less. The player sets the depth positions of subtitles in OSD display on the basis of these pieces of information.
The depth limitation 100 records (42) depth limitation (maximum viewing angle 1, maximum viewing angle 2, etc.). When a stereoscopic image protrudes or moves extremely forward, it will cause a psychological impression like “surprising”. Accordingly, the amount of protrusion of stereoscopic images, not of subtitles, is limited, so that the images are soft for the eyes or so that the images will not surprise the viewer too much. In this case, in the player, viewing angles corresponding to the maximum amounts of protrusion are previously recorded in the video content as shown in
The parallax limitation 101 describes (43) limitations of the amount of parallax (for filming, maximum viewing angle 1, minimum viewing angle 1, maximum viewing angle 2, minimum viewing angle 2, etc.). When there are a plurality of 3D video *streams, a plurality of depth-direction variation degrees are described. This information corresponds to the distance between two cameras during filming. The amount of reference parallax differs depending on the interval between human eyes, and this information defines the range of reference angles. It is thus possible to previously grasp the degree of discomfort that a small child, having a short interval between the eyes, would feel when viewing the video.
Thus, it is possible to alleviate discomfort by preparing video content that contains a plurality of stereoscopic video streams with different reference parallax values so that a selection can be made on the basis of the interval between the viewer's eyes. In animation and the like, recent innovative CG techniques are capable of easily changing the reference parallax value with a computer. In this case, such parallax value limitation information is described in the supplementary information, whereby the player can provide select buttons, e.g. indicating “** (age)”, “** (age)”, and “adult”, as shown in
As shown in
The information 69C about character size etc. records (45) character font, character size. The in-plane location information 69D records (46) character location information (X position, Y position).
The depth-direction OSD location information 69E records (47) depth position 69F, (48) permitted-depth limitation 69G (limitations for alleviating eye fatigue as described in the first preferred embodiment, such as a far-side limit position, a near-side limit position, a limitation on the amount of depth variation, etc.), and (49) depth zooming speed 69H (presence/absence of zooming, zooming speed). The depth zooming speed 69H defines zooming to alleviate eye fatigue, by gradually zooming from a certain subtitle to the next subtitle, instead of instantaneously varying the depth position.
The above-described pieces of supplementary information from (1) to (49) about 3D video information are superimposed on the video information stream and distributed together with the video information, and similar descriptions can be recorded also in the video control information 23 in a region separate from the video information itself, as described below. This allows all information to be read at the time when the player is started, and thus enables various initializations to be made. This also enables descriptions of more detailed control information, since a larger amount of information can be described regardless of bit rate and memory limit, than when it is superimposed on the video information.
Next, the structure of control information recorded in a certain region on the recording medium separately from the video information will be described.
In particular,
The control information located in a certain region of the recording medium separately from the video information describes all information including the supplementary information 34, 51 that are superimposed on the video information stream. By this, the control information is read first when the player/recorder is started so that various initializations can be made.
First, the video control information 23 is described as shown in
The supplementary information about video in the GOP table 102 includes 3D video information, and the same items as the items (32) to (43) described in the video stream can be described for each piece of GOP video information. Also, as shown in
Also, as shown in
Next, a third preferred embodiment will be described.
Now, the stereoscopic video recording apparatus shown in
In the configuration of
The video data in the format for recording to the optical disk is sent to the modulating means 158, and optically modulated and provided with error correcting code as information for physical writing to the optical disk 165. Then the LD modulation circuit 159 generates a signal for modulating the laser provided in the optical head 164. In this process, the servo circuit 162, for ensuring stable recording to the optical disk 165, controls the feed motor 163 for moving the optical head 164, the rotary motor 166 for rotating the disk 165, and the objective lens actuator in the optical head 164, to achieve tracking and focusing. During recording, it is necessary to read addresses on the optical disk 165, and a signal received at the optical head is photo-electrically converted to a fine signal, and the reproduction amp 161 reproduces the fine signal, and the address header identification circuit 160 generates address information. The address information is sequence-processed in the system controller 167 together with settings for activation of individual blocks, and processings for writing timing etc., especially requiring high-speed timing, are performed in dedicated hardware, and sequence setting portions requiring programming are performed in the CPU etc.
Now, the video stream generated by the stereoscopic video recording apparatus has a structure as illustrated in
The 3D video information 176 first includes information (or a flag) 177 indicating whether it is for the left eye or the right eye, and further includes 3D video scheme presence/absence 85, 3D video frame rate 86, number of 3D video information 87, depth information 100, and parallax limitation information 101, as described in the second preferred embodiment. Also, as shown in
The stereoscopic video recording apparatus shown in
The stereoscopic video recording apparatus of
Now,
Accordingly, with information about the amount of parallax (1261 or 126J) or with information about the parallactic angle (126D or 126E), it is possible, as shown in
Now, in the stereoscopic video recording apparatus shown in
Accordingly, in the stereoscopic video compression by the stereoscopic video recording apparatus shown in
Now,
On the other hand, in the reproduction of the images, the right-eye primary images 192A to 192G are in the form of the compressed right-eye primary images 195A to 195G that are encoded by the video compression. Specifically, the compressed right-eye primary images include an intra-compressed I picture 195A, P pictures 195D and 195G compressed in the temporal direction with in-plane motion vectors, and B pictures 195B, 195C, 195E, and 195F. The compressed right-eye primary images are reproduced into the reproduced right-eye primary images 198A to 198G by a common compressed-video-decompressing circuit. Then, the reproduced secondary images (left-eye images) 211 to 217 are restored on the basis of: the reproduced primary images (right-eye images) 198A to 198G; the estimated parallax information 204 to 210 about individual pictures; and differential information about individual pictures that are inverse-quantized and inverse-DCT-transformed. The image portions restored from the differential information work to complement the portions that cannot be reproduced with the estimated parallax information, caused by turning-around of images and the like.
It is also possible to more simply construct a video stream with stereoscopic images for the left eye and the right eye. For example, the stereoscopic video recording apparatus shown in
Now, as shown in
Next, a fourth preferred embodiment will be described referring the drawings. This preferred embodiment describes stereoscopic video reproducing apparatuses, while the third preferred embodiment has described stereoscopic video recording apparatuses.
Now, in the stereoscopic video reproducing apparatus shown in
In the OSD depth generating circuit 229A, OSD information is generated as OSD information having depth, on the basis of supplementary information obtained from the system decoder 226. The video stream decoded in the MPEG H264 decoder 227 is processed as 3D video information in the 3D video processing circuit 230, and blended in the blending circuit 229B with the OSD images having depth, and it can be outputted from the general-purpose IF, such as HDMI, when the transfer rate is low, or the left-eye images can be outputted from the dedicated left-eye IF 233 and the right-eye images from the dedicated right-eye IF 232.
When images on one side are further compressed by using parallax information, as described in the third preferred embodiment, the 3D video processing 230 of the stereoscopic video reproducing apparatus is configured as shown in
Next, a stereoscopic reproducing apparatus will be described which reproduces 2D images, not stereoscopic, from left-eye and right-eye stereoscopic images.
However, this method is problematic because an image having a depth close to the eyes (an image that appears protruding) involves a large amount of parallax, and then the position is shifted to the left or right as shown by the left-eye image 232A or the right-eye image 233A shown in
Furthermore, a large amount of protrusion (a high degree of three-dimensionality) might cause increased eye fatigue or an increased “surprising” impression as described in the second preferred embodiment. To prevent this,
In a scheme in which images on one side are compressed with parallax information, as described with the stereoscopic video recording apparatus of
The stereoscopic video reproducing apparatus of
This preferred embodiment has described apparatuses and methods for reproducing stereoscopic video information recorded on an optical disk, but it is needless to say that entirely the same effects are obtained when a hard disk is used as a recording medium.
While the invention has been described in detail, the foregoing description is in all aspects illustrative and not restrictive. It is understood that numerous other modifications and variations can be devised without departing from the scope of the invention.
Claims
1. A stereoscopic video recording method for recording, in a recording medium, stereoscopic video including left-eye and right-eye images utilizing parallax information, said method comprising:
- from video content that contains stereoscopic video, grasping the amount of variation in parallactic angle having a given or larger value, a variation time that the variation in parallactic angle takes, and the number of times that the variation in parallactic angle occurs; calculating an evaluation value that corresponds to the degree of eye fatigue on the basis of said amount of variation, said variation time, and said number of times of the variation; encoding said video content in such a manner that said evaluation value is within a given range; and recording the encoded said video content in said recording medium.
2. The stereoscopic video recording method according to claim 1, wherein, when recording the encoded said video content in said recording medium, said evaluation value is also recorded in said recording medium so that said evaluation value can be displayed when a user views said video content to allow the user to estimate the degree of eye fatigue in advance.
3. A stereoscopic video recording method for recording, in a recording medium, stereoscopic video including left-eye and right-eye images utilizing parallax information, said method comprising:
- grasping a maximum parallactic angle value from video content that contains stereoscopic video; encoding said video content in such a manner that said maximum parallactic angle value is not more than a given value; and recoding the encoded said video content in said recording medium, wherein said maximum parallactic angle value is also recorded in said recording medium so that said maximum parallactic angle value can be displayed when a user views said video content to allow the user to recognize a maximum degree of three-dimensionality of the stereoscopic video.
4. A stereoscopic video recording method for recording, in a recording medium, stereoscopic video including left-eye and right-eye images utilizing parallax information, said method comprising:
- from video content that contains stereoscopic video, grasping the amount of variation in parallactic angle having a given or larger value, a variation time that the variation in parallactic angle takes, and the number of times that the variation in parallactic angle occurs; and calculating an evaluation value that corresponds to the degree of eye fatigue on the basis of said amount of variation, said variation time, and said number of times of the variation;
- defining a stereoscopic-video parental level on the basis of a maximum parallactic angle value grasped from said video content, said evaluation value, and a flat-video parental level; and
- recoding said stereoscopic-video parental level in said recording medium together with said video content so that a restriction can be imposed on the viewing of said video content.
5. The stereoscopic video recording method according to claim 1, wherein, for blending of a stereoscopic image and a subtitle image that is formed in a stream as OSD information separately from said video content, supplementary information for limiting a range of display of said subtitle image in a depth direction is recorded in said recording medium separately from said video content and said OSD information.
6. A stereoscopic video recording method for recording, in a recording medium, stereoscopic video including left-eye and right-eye images utilizing parallax information,
- wherein video content that contains stereoscopic video is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time,
- and wherein said video content is recorded in said recording medium in such a manner that flat and stereoscopic images in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and a flat video stream having the same contents as a stereoscopic video stream exists in parallel so that the flat and stereoscopic video streams can be switched by a setting of a reproducing apparatus.
7. The stereoscopic video recording method according to claim 6, wherein, in said recording medium, control information related to a video unit in which said digital video information continues in time is recorded as supplementary information at a beginning of said video unit.
8. The stereoscopic video recording method according to claim 6, wherein, in said recording medium, in a video unit in which said digital video information continues in time, a user data start code is defined in a header portion of said digital video information, and control information related to said video unit is recorded as supplementary information following said user data start code.
9. The stereoscopic video recording method according to claim 6,
- wherein GOP table information is recorded in a video control information recording region that is separate from said digital video information, and said GOP table information includes locations and time codes- of the units of said digital video information, in a video unit in which said digital video information continues in time, and
- in said GOP table information in said recording medium, control information related to said video unit is recorded as supplementary information.
10. The stereoscopic video recording method according to claim 7, wherein said digital video information is recorded in said recording medium in such a manner that the left-eye and right-eye images are sequentially arranged as independent units.
11. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording content information that describes content name, cast, time of production, and distributor of the video content.
12. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording copyright information that describes copyright owner, distributor, and capital participant.
13. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording stereoscopic video information that describes presence/absence of stereoscopic image compatibility, presence/absence of all-flat-image compatibility indicating whether the video content can be reproduced to the end only with flat images, and information as to whether stereoscopic reproduction has priority when stereoscopic image compatibility is present.
14. The stereoscopic video recording method according to claim 7, wherein a region code that is recorded in said supplementary information to restrict a region for reproduction includes reproduction permission about flat video and reproduction permission about stereoscopic video.
15. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording OSD information that describes a character font displayed as OSD information, a character size, in-plane location information, and depth-direction position information.
16. The stereoscopic video recording method according to claim 15, wherein said OSD information further includes presence/absence of a depth-direction limitation and a limit position.
17. The stereoscopic video recording method according to claim 15, wherein said OSD information further includes a speed of depth-direction positional variation.
18. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording stereoscopic video time information that includes a time code indicating a start of stereoscopic reproduction, and a total stereoscopic reproduction time from a start to an end of stereoscopic reproduction or a remaining reproduction time to an end of stereoscopic reproduction from a time during the reproduction.
19. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording jump destination information that indicates presence/absence of seamless reproduction to next said digital video information, a jump destination's address to a video unit or a jump destination's time code, and presence/absence of stereoscopic information in said video unit as a jump destination.
20. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording resolution information that includes an in-plane resolution for flat-image reproduction, an in-plane-direction resolution of a PinP image, and a depth-direction resolution.
21. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording stereoscopic video scheme information that includes at least one of: designation about a scan-doubling rate on a display apparatus side during stereoscopic reproduction, presence/absence of the use of polarizing eyeglasses, and presence/absence of the use of a liquid-crystal shutter mechanism.
22. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording frame rate information that includes a frame rate for flat-video reproduction and a frame rate for stereoscopic-video reproduction.
23. The stereoscopic video recording method according to claim 7, wherein said supplementary information has a region for recording angle information that includes the number of independent stereoscopic video stream(s) that are reproduced in parallel when stereoscopic video stream(s) are constructed in parallel with multi-angle flat video streams.
24. The stereoscopic video recording method according to claim 7, wherein said digital video information or said video unit is recorded in said recording medium with padding data added at an end such that said digital video information or said video unit fits an integral multiple of a transport packet.
25. A stereoscopic video recording method for recording, in a recording medium, stereoscopic video including left-eye and right-eye images utilizing parallax information,
- wherein video content that contains stereoscopic video is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time, and
- said video content is recorded in said recording medium in such a manner that flat and stereoscopic images in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and said right-eye and left-eye images of the stereoscopic video are alternately arranged.
26. A stereoscopic video recording method for recording, in a recording medium, stereoscopic video including left-eye and right-eye images utilizing parallax information,
- wherein video content that contains stereoscopic video is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time, and
- said video content is recorded in said recording medium in such a manner that flat and stereoscopic images in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and one of said right-eye images and left-eye images of the stereoscopic video are recorded in a form compressed into differential information in relation to the other.
27. The stereoscopic video recording method according to claim 26, wherein said differential information about the stereoscopic video is recorded as supplementary information in said recording medium.
28. A stereoscopic video recording method for recording, in a recording medium, stereoscopic video including left-eye and right-eye images utilizing parallax information,
- wherein video content that contains stereoscopic video is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time, and
- in said video content, flat and stereoscopic images in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner,
- and wherein one of said right-eye images and left-eye images of the stereoscopic video are composed of, in units of pixels or in units of macroblocks as minimum units of compressed images: parallactic angle information for reproduction that can be achieved from parallactic angle in relation to the other; and differential information for reproduction that cannot be achieved with said parallactic angle information, and wherein said parallactic angle information and said differential information are recorded as supplementary information in said recording medium.
29. A stereoscopic video recording medium in which said video content including stereoscopic video is recorded by the stereoscopic video recording method of claim 1.
30. A stereoscopic video reproducing method for reproducing stereoscopic video including left-eye and right-eye images utilizing parallax information,
- wherein, with a recording medium recording video content that includes stereoscopic video and that is encoded in such a manner that a maximum parallactic angle value grasped from said video content is not more than a given value,
- said stereoscopic video reproducing method reads said maximum parallactic angle value from said recording medium, and displays said maximum parallactic angle value when a user views said video content so that the user can recognize a maximum degree of three-dimensionality of the stereoscopic video.
31. A stereoscopic video reproducing method for reproducing stereoscopic video including left-eye and right-eye images utilizing parallax information,
- wherein, with a recording medium recording video content that contains stereoscopic video and a stereoscopic-video parental level about said video content, said stereoscopic-video parental level being based on: an evaluation value corresponding to the degree of eye fatigue that is calculated from said video content; a maximum parallactic angle value that is grasped from said video content; and a flat-video parental level,
- said evaluation value being calculated by: grasping, from said video content, the amount of variation in parallactic angle having a given or larger value; a variation time that the variation in parallactic angle takes, and the number of times that the variation in parallactic angle occurs; and calculating said evaluation value on the basis of said amount of variation, said variation time, and said number of times of the variation,
- said stereoscopic video reproducing method reads said stereoscopic-video parental level from said recording medium, and imposes a restriction on the viewing of said video content on the basis of said stereoscopic-video parental level.
32. The stereoscopic video reproducing method according to claim 30, wherein, for blending of a stereoscopic image and a subtitle image that is formed in a stream as OSD information separately from said video content, said recording medium records supplementary information for limiting a range of display of said subtitle image in a depth direction,
- and wherein said stereoscopic video reproducing method reads said supplementary information from said recording medium, and displays said subtitle image in a form blended with the stereoscopic image on the basis of said supplementary information.
33. A stereoscopic video reproducing method for reproducing stereoscopic video including left-eye and right-eye images utilizing parallax information,
- wherein, with a recording medium recording video content that contains stereoscopic video,
- said video content being composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time,
- said video content being recorded in said recording medium in such a manner that flat and stereoscopic images in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and a flat video stream having the same contents as a stereoscopic video stream exists in parallel,
- said stereoscopic video reproducing method reproduces said video content from said recording medium in such a manner that the flat and stereoscopic video streams can be switched by a setting.
34. The stereoscopic video reproducing method according to claim 33,
- wherein, in said recording medium, control information related to a video unit in which said digital video information continues in time is recorded as supplementary information at a beginning of said video unit,
- and wherein said stereoscopic video reproducing method reads said control information from said recording medium.
35. The stereoscopic video reproducing method according to claim 33,
- wherein, in said recording medium, in a video unit in which said digital video information continues in time, a user data start code is defined in a header portion of said digital video information, and control information related to said video unit is recorded as supplementary information following said user data start code,
- and wherein said stereoscopic video reproducing method reads said control information from said recording medium.
36. The stereoscopic video reproducing method according to claim 33,
- wherein, in said recording medium, GOP table information is recorded in a video control information recording region that is separate from said digital video information, and said GOP table information includes locations and time codes of the units of said digital video information, in a video unit in which said digital video information continues in time, and
- in said GOP table information in said recording medium, control information related to said video unit is recorded as supplementary information,
- and wherein said stereoscopic video reproducing method reads said control information from said recording medium.
37. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads content information that describes content name, cast, time of production, and distributor of the video content.
38. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads copyright information that describes copyright owner, distributor, and capital participant.
39. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads stereoscopic video information that describes presence/absence of stereoscopic image compatibility, presence/absence of all-flat-image compatibility indicating whether the video content can be reproduced to the end only with flat images, and information as to whether stereoscopic reproduction has priority when stereoscopic image compatibility is present.
40. The stereoscopic video reproducing method according to claim 34, wherein, a region code for restricting a region for reproduction that is read from said supplementary information in said recording medium includes reproduction permission about flat video and reproduction permission about stereoscopic video.
41. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads OSD information that describes a character font displayed as OSD information, a character size, in-plane location information, and depth-direction position information.
42. The stereoscopic video reproducing method according to claim 41, wherein, from said OSD information, said stereoscopic video reproducing method further reads presence/absence of a depth-direction limitation and a limit position.
43. The stereoscopic video reproducing method according to claim 41, wherein, from said OSD information in said recording medium, said stereoscopic video reproducing method further reads a speed of depth-direction positional variation.
44. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads stereoscopic video time information that includes a time code indicating a start of stereoscopic reproduction, and a total stereoscopic reproduction time from a start to an end of stereoscopic reproduction or a remaining reproduction time to an end of stereoscopic reproduction from a time during the reproduction.
45. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads jump destination information that indicates presence/absence of seamless reproduction to next said digital video information, a jump destination's address to a video unit or a jump destination's time code, and presence/absence of stereoscopic information in said video unit as a jump destination.
46. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads resolution information that includes an in-plane resolution for flat-image reproduction, an in-plane-direction resolution for a PinP image, and a depth-direction resolution.
47. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads stereoscopic video scheme information that includes at least one of: designation about a scan-doubling rate on a display apparatus side during stereoscopic reproduction, presence/absence of the use of polarizing eyeglasses, and presence/absence of the use of a liquid-crystal shutter mechanism.
48. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads frame rate information that includes a frame rate for flat-video reproduction and a frame rate for stereoscopic-video reproduction.
49. The stereoscopic video reproducing method according to claim 34, wherein, from said supplementary information in said recording medium, said stereoscopic video reproducing method reads angle information that includes the number of independent stereoscopic video stream(s) that are reproduced in parallel when stereoscopic video stream(s) are constructed in parallel with multi-angle flat video streams.
50. A stereoscopic video recording apparatus,
- wherein said stereoscopic video recording apparatus comprises one video generating block provided for one of the left and right eyes and another video generating block provided for the other eye, or comprises one video generating block that is operated at a doubled rate, and each of said one and another video generating blocks, or said one video generating block, comprises:
- an AD converter that digitizes a video signal of video content that contains stereoscopic video;
- a motion detecting circuit that detects motion vectors necessary to video-compress the digitized said video signal in a temporal direction;
- a DCT transform circuit that applies DCT transform necessary for intra-compression to the digitized said video signal;
- an adaptive quantization circuit that applies quantization necessary for intra-compression to the DCT-transformed said video signal;
- a variable-length coding circuit that applies variable-length coding necessary for intra-compression to the quantized said video signal; and
- an inverse quantization circuit and an inverse DCT transform circuit that decode the quantized said video signal as a local decoder,
- and wherein said stereoscopic video recording apparatus records the video content and its supplementary information in a recording medium,
- and wherein said video content is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time, and
- in said video content, flat and stereoscopic images in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and form a temporally continuous video unit.
51. A stereoscopic video recording apparatus,
- wherein said stereoscopic video recording apparatus comprises a video generating block provided for one of the left and right eyes, and said video generating block comprises:
- an AD converter that digitizes a video signal of video content that contains stereoscopic video;
- a motion detecting circuit that detects motion vectors necessary to video-compress the digitized said video signal in a temporal direction;
- a DCT transform circuit that applies DCT transform necessary for intra-compression to the digitized said video signal;
- an adaptive quantization circuit that applies quantization necessary for intra-compression to the DCT-transformed said video signal;
- a variable-length coding circuit that applies variable-length coding necessary for intra-compression to the quantized said video signal; and
- an inverse quantization circuit and an inverse DCT transform circuit that decode the quantized said video signal as a local decoder,
- and wherein said stereoscopic video recording apparatus further comprises another video generating block that is provided for the other eye, and said another video generating block utilizes a differential from said video signal of said video generating block, and
- said stereoscopic video recording apparatus records the video content and its supplementary information in a recording medium,
- and wherein said video content is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time, and
- in said video content, flat images and stereoscopic images utilizing parallax information in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and form a temporally continuous video unit.
52. A stereoscopic video recording apparatus,
- wherein said stereoscopic video recording apparatus comprises a video generating block provided for one of the left and right eyes, and said video generating block comprises:
- an AD converter that digitizes a video signal of video content that contains stereoscopic video;
- a motion detecting circuit that detects motion vectors necessary to video-compress the digitized said video signal in a temporal direction;
- a first DCT transform circuit that applies DCT transform necessary for intra compression to the digitized said video signal;
- a first adaptive quantization circuit that applies quantization necessary for intra-compression to the DCT-transformed said video signal;
- a variable-length coding circuit that applies variable-length coding necessary for intra-compression to the quantized said video signal; and
- an inverse quantization circuit and an inverse DCT transform circuit that decode the quantized said video signal as a local decoder,
- and wherein said stereoscopic video recording apparatus further comprises another video generating block for the other eye, and said another video generating block comprises:
- a parallax information calculating circuit that calculates the amount of parallax with respect to said video signal of said video generating block;
- a depth-direction motion detecting circuit that detects motion vectors of said video signal in a depth direction;
- an estimated parallax information generating circuit that generates estimated parallax information on the basis of outputs of said parallax information calculating circuit and said depth-direction motion detecting circuit;
- an inverse parallax calculating circuit that generates an image of said another video generating block from said estimated parallax information;
- a second DCT transform circuit that applies DCT transform to said image generated by said inverse parallax calculating circuit; and
- a second adaptive quantization circuit that quantizes an output of said second DCT transform circuit,
- and wherein said stereoscopic video recording apparatus records the video content and its supplementary information in a recording medium, and wherein said video content is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time, and
- in said video content, flat images and stereoscopic images utilizing parallax information in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and form a temporally continuous video unit.
53. A stereoscopic video reproducing apparatus that reproduces a recording medium that records video content and supplementary information, wherein said video content is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time, and in said video content, flat images and stereoscopic images utilizing parallax information in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and form a temporally continuous video unit,
- wherein said stereoscopic video reproducing apparatus comprises:
- a system decoder that separates a video stream containing video audio data from a signal read from said recording medium;
- a compressed-video decoder that decompresses compressed video of the separated said video stream;
- an audio decoder that decompresses compressed audio of the separated said video stream;
- an OSD decoder that extracts OSD information that contains subtitle display from said supplementary information;
- a depth generating circuit that generates a depth-direction location of said OSD information from said supplementary information;
- a stereoscopic video processing circuit that generates said stereoscopic images from the video information decompressed by said compressed-video decoder; and
- a blending circuit that superimposes said OSD information on said stereoscopic images.
54. A stereoscopic video reproducing apparatus that reproduces a recording medium that records video content and supplementary information, wherein said video content is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time, and in said video content, flat images and stereoscopic images utilizing parallax information in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and form a temporally continuous video unit,
- wherein said stereoscopic video reproducing apparatus comprises:
- a system decoder that separates a video stream containing video audio data from a signal read from said recording medium;
- a compressed-video decoder that decompresses compressed video of the separated said video stream;
- an audio decoder that decompresses compressed audio of the separated said video stream;
- a parallax information coefficient varying portion that varies the amount of parallax of said parallax information according to a setting by a user; and
- a stereoscopic video processing circuit that generates said stereoscopic images on the basis of the video information decompressed by said compressed-video decoder and said amount of parallax varied by said parallax information coefficient varying portion.
55. A stereoscopic video reproducing apparatus that reproduces a recording medium that records video content and supplementary information, wherein said video content is composed of digital video information comprising an I picture that is data-compressed within a frame, a P picture that is data-compressed with motion compensation from said I picture in a preceding direction in time, and a B picture that is data-compressed with motion compensation from said I or P picture in a preceding/following direction in time, and in said video content, flat images and stereoscopic images utilizing parallax information in units of said digital video information or an integral multiple of said digital video information exist in a mixed manner, and form a temporally continuous video unit,
- wherein said stereoscopic video reproducing apparatus comprises:
- a system decoder that separates a video stream containing video audio data from a signal read from said recording medium;
- a compressed-video decoder that decompresses compressed video of the separated said video stream;
- an audio decoder that decompresses compressed audio of the separated said video stream;
- a parallax information extracting portion that detects the amount of said parallax from said recording medium;
- a parallax information coefficient varying portion that varies said amount of parallax extracted by said parallax information extracting portion according to a setting by a user; and
- a stereoscopic video processing circuit that generates said stereoscopic images on the basis of the video information decompressed by said compressed-video decoder and said amount of parallax varied by said parallax information coefficient varying portion.
Type: Application
Filed: May 15, 2008
Publication Date: Jun 4, 2009
Applicant:
Inventors: Masato Nagasawa (Tokyo), Keiji Hatanaka (Tokyo), Kazuhiro Kurisaki (Tokyo)
Application Number: 12/153,244
International Classification: H04N 7/26 (20060101); H04N 13/00 (20060101);