JPS63151293A - Video reproducing device - Google Patents

Abstract

PURPOSE:To excellently reproduce an ordinary video from a disk in which stereoscopic video is recorded by providing a jumping controller, and moving the reading position of a discriminating signal detector from a half-frame position on a track of first video signals to that of a track of second video signals. CONSTITUTION:When a first jumping signal code (f) is detected by a detection circuit 41 from an output signal from a reproduction transducer 20, the jumping control circuit 35 jumping-controls so that a laser beam reaching position moves to an outer side track to be reproduced. By making the planes of polarization of video signals differ from each other alternately at every field, a stereoscopic video can be seen through a polarization glasses having the planes of polarization differ from each other on right and left sides. To obtain an ordinary video, when a second jumping signal code (r) is detected by a detection circuit 42, the jumping control circuit 35 controls so that the laser beam reaching position moves to the outer side track to reproduce signals. In this case, ordinary video signals equivalent to those of the image of an object seen with right side eye of a viewer are reproduced in a television monitor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video reproducing device for, for example, a stereoscopic video recording disk on which two video signals are recorded.

[Prior Art] FIG. 10 is a diagram showing a disk on which a video signal is recorded. In the figure, (1) is a disk, (2) is a spiral track on which a video signal is recorded, (Fl), (F
2), (F3)... are each field of the video, (
A)-(B), (C), . . . indicate the boundaries of each field.

FIG. 11 is a configuration diagram showing a device for recording video on the disk (1), where (3) is the subject, (4) is the video camera, and (5) is the device that records the output of the video camera (4). (6) is a storage device such as a VTR for converting a video signal into a signal suitable for recording on the disc (1).
For example, a recording processing circuit for applying frequency modulation, etc. (7
) is a motor for rotating the disk (1), (8)
is a disk servo (
9) is a timing signal generator that sends various timing signals to the storage device (5) and the disk servo (8).

Next, track formation on this disk (1) will be explained using FIGS. 10 and 11.

A subject (3) is photographed by a video camera (4), and the optical image is converted into an electrical video signal. This video signal is recorded in a storage device (5) (for example, a VTR). Storage device (5)
sequentially sends out video signals according to commands from the timing signal generator (9). This video issue is the recording processing circuit (
6), and then recorded on the disk (1) by a recording transducer (not shown). The recording transducer is a magnetic head when the disk (11) is a magnetic medium, and a laser condenser when the disk (1) is an optical medium, and various forms are used depending on the medium. The recording transducer is fed at a constant speed in the radial direction of the disk (1) by a radial feeding mechanism (not shown).

The disk (1) is rotated by a motor (7) controlled by a disk servo (8). The disk servo (8) controls the rotation of the motor (7) in accordance with the field frequency of the video signal from one storage device (5) according to the command from the timing signal generator (9), and controls the rotation of the motor (7) in relation to the field frequency of the video signal from one storage device (5). frame) for exactly one rotation.

In this way, the video signal is recorded on the disk (1), and when the disk (1) rotates once, two fields of video are recorded. That is, as shown in FIG. 10, if the disk (1) rotates in the direction of arrow track from (B) to field (F2) in the next half turn from boundary (B) to (C)
The tracks up to this point are formed one after another in the same manner, and a spiral track is formed as shown in FIG.

Note that although the signal from the video camera (4) is recorded once in the storage device (5) and then recorded on the disk (1), it is not necessary to record the signal from the video camera (4) through the storage device (5). The signal from the camera (4) is sent directly to the disk (
1), a spiral track similar to the above can be recorded.

Next, when reproducing a signal from such a disk (1), the disk (1) is rotated in the same way as when recording, and a reproducing transducer reads the signal from the spiral track and determines the frequency. A reproduced video signal can be obtained by performing reproduction processing such as demodulation. Here, as a specific example, a video reproducing apparatus for an optical video disc in which video signals are recorded as bits on the disc will be described. FIG. 9 shows a conventional video reproducing apparatus. In the figure, (1) is a disk on which video signals are recorded in the method described above, and its rotation is controlled in the same manner as described above. (20) is a semiconductor laser diode (21), a lens device, a beam splitter (23), a large board, a focusing lens (2), a drive coil for fish collection control (a), a drive coil for tracking control , a reproducing transducer having a lens (support) and a light-receiving element.
1) Read the upper bit. Specifically, the laser beam emitted from the semiconductor laser diode (21) is irradiated onto the disk (11) via the lens @, the beam splitter, the single plate (2) and the condensing lens (25), and the laser beam is irradiated on the disk surface. This reflected light is reflected by a condensing lens, a single plate, and a beam splitter.
, enters the light receiving element (29) via Lens (Inc.).

The light receiving element (29) which receives this reflected light has a function of detecting whether or not the laser beam irradiated to the disk (1) is focused on the disk surface, and generating an error output according to the focus shift. , has a function of detecting whether or not the irradiated laser beam is tracking a track on the disk surface and generating an error output according to track deviation, and a function of reading out a video signal from pits formed as a track. are doing.

In reality, in order to have these functions, a light receiving element (support) is required.
Although various methods have been adopted for the additional circuit, the laser beam irradiation method, etc., the details are not directly related to the present invention and will therefore be omitted. Subsequently, when the error output corresponding to the focus shift is guided to the focus control circuit (30), the focus control circuit (30) causes a drive current corresponding to the error output to flow through the focus control drive coil 2, thereby focusing the focus. The optical lens (c) is moved in the direction of the optical axis to control the direction in which the one-error output becomes zero, that is, the laser beam is focused on the disk surface. Furthermore, the error output corresponding to the above-mentioned track deviation is output from the tracking control circuit c.
111, the tracking control circuit sends a drive current corresponding to this error output to the tracking control drive coil (4) to move the condensing lens (25) in a direction perpendicular to the optical axis and irradiate the disk surface. The laser beam is moved in a direction perpendicular to the track and controlled so that the error output becomes zero, that is, the laser beam correctly tracks the track. Using the laser beam that is focused in this manner and configured to correctly track the track, the signal read out as reflected light from the pits on the disk (1) is sent to the video signal demodulation circuit (32). The original video signal is demodulated and output between the terminals.This output signal is applied to the monitor TV and the image is displayed.With this image playback function activated, the playback transducer is User (20+) is transferred to disk (1
) in the radial direction at a standard speed, the laser beam follows the track continuously and a normal reproduction image with a continuous standard speed is obtained.

Note that the adder (circle) is provided to perform special playback such as slow still and quick playback, and is used to jump the irradiation position of the laser beam generated by the jumping control circuit (35). By superimposing a special waveform signal on the track deviation error output, a desired special reproduction can be obtained.

- As an example, the radial movement by the radial feed mechanism of the reproducing transducer (A) is stopped, the still mode is specified by the mode control circuit cf3+, and the vertical synchronization signal is transmitted from the video signal to the vertical synchronization separation circuit ( ),
A case will be described in which the jumping control circuit (g) operates via the switch for each synchronization signal. A jumping control circuit (5) controls the jump control circuit (5) every time the laser beam scans the track once in response to the vertical synchronization signal recorded for each field on the disk (1).
) is used to add a special waveform signal that returns the irradiation position of the laser beam by one track each time it rotates.
to be applied. As a result, the reading position of the reproduction transducer is returned to its original position by one frame, thereby realizing still reproduction. Similarly, special reproductions such as slow, quick, and reverse can also be realized by appropriately controlling the radial feed mechanism and jump mechanism of the transducer (a).

In the above manner, a normal playback screen or a special playback screen is realized.

[Problem that the invention seeks to solve]

Conventional video playback devices use a radial mechanism to continuously scan tracks formed in a spiral shape on the disk (1) as described above, so even if a stereoscopic video signal is recorded on the disk (1), However, there was a problem that 3D images could not be played back.

The present invention has been made to solve the above-mentioned problems, and its object is to provide a video playback device that can play back normal video or stereoscopic video when playing back a disk on which stereoscopic video signals are recorded.

[Means for solving problems]

The video reproducing device according to the first aspect of the present invention is capable of performing the above-mentioned method in reproducing a disc in which the first and second video signals are recorded in a spiral track while alternately switching each one frame by frame. When the first video signal is played back up to half a frame track, the adjacent second video signal is played back.
A jumping controller is provided to start playback from a half-frame track of the video signal.

Further, the video reproducing device according to the second aspect of the present invention is a disc recording device in which the first and second video signals are recorded in a spiral track while being alternately switched for each frame. During playback, when the track of one frame of the one video signal is played to the end, the track of the adjacent one of the video signals starts playing from the beginning of the track of the other frame. It is equipped with a jumping controller.

[Effect]

In the video playback device according to the first aspect of the present invention, the jumping controller is a signal reader that reads first and second video signals and identification signals recorded in a spiral track on a disk. Upon receiving the identification signal detected by the identification signal detector from the output of the signal detector, the reading position of the signal detector is moved from the half-frame position of the first video signal track to the half-frame position of the adjacent second video signal track. let

In the video reproducing device according to the second aspect of the present invention, the jumping controller is a signal reader that reads the first and second video signals J and the identification signal recorded in a spiral track on the disk. In response to the identification signal detected by the identification signal detector from the output of the signal detector, the reading position of the signal detector is moved from the end of one frame of the track of one video signal to the start of one frame of the next track of the one video signal. let

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 8. In FIG. 1, (1) is a disk on which a stereoscopic video signal consisting of first and second video signals and an identification signal including first and second jumping signals (f) and (r) are recorded; 7) to (9) and (a) to (36) are the same or equivalent parts of the conventional device. (4o) is a changeover switch for selecting whether to play stereoscopic images or normal images; (41J is the first jumping signal code, which is an identification signal recorded on the disk (11);
f) a first jumping signal detection circuit for detecting (4);
The second jumping signal code (r) is an identification signal recorded in the disk (1).
This is a jumping signal detection circuit and is connected to the first and second jumping signal detection circuits (41)-(421 is a jumping control circuit via a changeover switch (40)).

FIG. 2 is a plan view showing a disk on which a stereoscopic video signal is recorded, and (1) is a plan view showing a disk on which a video signal is recorded.
(2) is a track indicating the position where the video signal is recorded on the disk (1), (Ro), (R1), (R2)
. . . are tracks of the first video signal captured by the first video camera, (LO), (Ll), (L2
)... are tracks of the second video signal captured by the second video camera, (A), (B), (C),
. . . indicates the boundary between each field.

FIG. 3 is a diagram showing the configuration for recording on the disk,
Figure 4 is a waveform diagram during recording, where (4a) is the first video camera corresponding to the right eye, (4b) is the second video camera corresponding to the left eye, and (5a) and (5b) are respectively First and second video cameras (4a) - (4
0α is a storage device such as a VTR that stores the output of b) and a recording processing circuit (6
), aυ is a jumping signal code generator that generates a jumping signal code, and (12) adds the output signal from the jumping signal code generator to the output signal from the recording processing circuit (6). It is an adder that For other parts that are the same as before, the first
The same reference numerals as in Figure 1 are given.

(a) in Fig. 4 shows the changeover switch (output of 101 - (b
) is the command signal applied to changeover switch a (support) from the timing signal generator (9), (C) is the output of the recording processing circuit (6), and (d) is the output of the jumping signal code generator (111). , (f) is the first jumping signal recorded at the center of each frame of one video signal, (
r) is a second jumping signal recorded at the portion where the two video signals switch.

Figure 5 shows track scanning and reproduced video signals when playing back 3D images, Figure 6 shows track scanning when playing back 3D still images, and Figures 7 (a) and (b) when playing back normal images. Figure 8 shows track scanning when reproducing a normal still image.

Next, the track format of the disc (1) related to the video reproducing apparatus of the present invention will be explained. As shown in Fig. 3, two video cameras (4a) and (4b) are placed at positions equivalent to the distance between the left and right eyes for the same subject (3), and are Images are taken from two directions. The video cameras (4a) and (4b) are equipped with a timing signal generator (
9) and operate in synchronization with each other based on the last name synchronization signal. These imaging signals are recorded in storage devices (5a) and (5b), such as VTRs, respectively. The stored video signals are read out from the storage device (5a) or (5b) at a desired timing based on the command from the timing signal generator (9) - these signals are guided to the top of the changeover switch ( 10) is controlled by the output of the timing signal generator M(9) so as to be switched in correlation with the reading of the storage signal.

That is, the changeover control pulses shown in FIG.
), as shown in Fig. 4 (a), [Ro, R1], [Lo
, Ll), [R2-R3]-[L2-L3]-...
A video signal is obtained in the order of... This video signal is frequency modulated in the next recording processing circuit (6) and is
) is applied to the adder 0z. In addition, the jumping signal code generator 01J receives a command from the timing signal generator (9) and generates an approximately central portion of the video signal in units of two fields (one frame) output from the one storage device (5a). For example, at a timing corresponding to the vertical synchronization signal, as shown in FIG. 4(d), the first jumping signal code (f) is generated, and the second half field output from the storage device (5a) is generated. At a timing corresponding to approximately the center of the video signal of 1 and the video signal of one adjacent field output from the storage device (5b), the first and second jumping signal codes (r) are output as shown in FIG. 4(d). occurs. These jumping signal codes and the above-mentioned video signal are multiplexed by an adder 02), guided to a recording transducer (not shown), and recorded on the disk (1) in the same manner as described in connection with the conventional apparatus.

The disk (1) undergoes IDO rotation in one frame (two fields) of the video signal under the control of a disk servo (8) that receives a command from a timing signal generator (9). The recording transducer is fed from the inside of the disk (1) to the outside at a constant speed by a radial feed mechanism (not shown), and rotates the disk (1) in the direction indicated by arrow X, as shown in FIG. In this case, recording tracks are formed in a spiral shape. In this way, disk (1)
One field of the video signal is recorded every half rotation, and exactly two fields (that is, one frame) are recorded in one rotation.

This situation is shown in Figure 1, where one field (Ro) - (R
1)-(Lo)-(L,l)-(R2)-(R3
)-(L2)-(L3)..., tracks are formed by each field, and the boundary (AL (
CL Among points (E), (G), (I)..., (A), (E)-(I)..., the above first jumping signal (f) is applied. are recorded, and the boundary (B),
p), (F), the same... of the points (B), (F
)..., the second jumping signal code (r) is recorded.

The above is the method for forming tracks on a disk (1) on which stereoscopic video signals are recorded - such a disk (1)
A video reproducing apparatus of the present invention for obtaining stereoscopic video or normal video from a computer will be described with reference to FIG.

First, to obtain a stereoscopic image, do the following. A reproduction transducer (transferred by a radial feed mechanism) reproduces the signal from the recording track, and from this signal, the video signal demodulation circuit (2) separates the video signal and jumping signal code, and performs reproduction such as frequency demodulation on the video signal. It is processed and shown on a TV monitor. Further, the first jumping signal code 1' (f) is output from the output signal from the regenerative transducer Co., Ltd. to the first jumping signal detection circuit (4).
1), the jumping control circuit (35)
Jumping control is performed so that the laser beam irradiation position of the reproduction transducer (20) is shifted to one track outside for reproduction. In this way, one field (kO), (Ll), (R2), (L3) from among the fields recorded by scanning the track as shown in FIG. 5(a) is reproduced. + (R4
), (L5)... are played back in sequence. The reproduced video signal and the detection signal of the first jumping signal code (f) at this time are shown as (A>, (B)) in FIG. 5(b), respectively. That is, they correspond to the subject image seen with the right eye. The video signal and the video signal corresponding to the image of the subject seen with the left eye are made to have different planes of polarization alternately every -1 field, and these are transmitted to the right eye using polarized glasses with different polarization planes on the left and right sides. The corresponding field is for the right eye, and the field for the left eye is for the left eye, i.e. fields (kO), (R2).
- The reproduced images of (R4)... are viewed only by the right eye, and the reproduced images of fields (Ll), (L3), (L5)... are viewed alternately by the left eye only. You can see a 3D image. In addition, when viewing a still reproduction image of a stereoscopic image, the radial feed mechanism is stopped and the reproduction transducer (20) transmits the first jumping signal code (
When f) is detected, the playback transducer @) is controlled to move to the next inner track, and as a result, for example, as shown in FIG.
)-(R2), (Ll), etc. are repeated, and a stereoscopic still image can be viewed.

Next, to obtain a normal image, do the following. Similarly to the above, the reproduction transducer (20) reproduces the signal from the recording track, and the second jumping signal code (r) is transmitted from the output signal from the reproduction transducer to the second jumping detection circuit (42). When detected, the jumping control circuit (35) moves the laser beam irradiation position of the reproducing transducer to one track outside for reproduction.

In this way, the playback transducer @) scans the track and fields (R) as shown in FIG. 7(a).
o), (R1), (R2), (R3), etc. are reproduced in sequence.

The reproduced video signal and the detection signal of the second jumping signal code (r) at this time are shown in (A) of FIG. 7(b), respectively.
- Shown as (B). In other words, in this case, a video signal corresponding to the image of the subject seen with the right eye is played back on the TV monitor.
You can watch normal videos. Also, when viewing still playback, when the first and second jumping signal code (r) is detected, the playback is performed by moving to the next inner track - that is, for example, as shown in Fig. 8, the field (R2
)-(R3)-(R2)-13)..., normal video still playback can be performed.

Furthermore, a changeover switch (40) is provided, which is turned to the S side during stereoscopic video playback, and the first jumping signal detection circuit (
41) and the jumping control circuit, turn it to the N side during normal video playback, and connect the second jumping signal detection circuit (42) to the jumping control circuit to realize a 3D and normal video playback device. can.

Further, it is preferable to record the identification signal on the disk by superimposing it on the synchronization signal (particularly the vertical synchronization signal) in the video signal, since the influence of the identification signal on the reproduced image is small.

Note that in the above embodiment, in order to play normal video, the first
In addition to the jumping signal code (f), a second jumping signal code (r) was recorded, but even if the second jumping signal code (r) is not recorded, only the first jumping signal code (f> It is also possible to carry out control by using the first jumping signal code (f).
The reproducing transducer (2o) may be shifted to the adjacent track with a delay of one field after detecting the signal.

Furthermore, if each field or frame of the video signal contains a signal that allows identification of each field or frame, such as a track number, it is not necessarily necessary to record the jumping signal codes (f) and (r). When the reproduction transducer (a) detects a vertical synchronization signal using the track number repeat signal as a clue, this can be used to perform the various jumping controls described above.

In the above embodiment, fields (Ro) and (LL) are selected from among the fields recorded to obtain a stereoscopic image.
, (R2), (L3), (R4), (L5) ---
・The first jumping signal code (f) was recorded so that it could be played back in the order of the field (C) shown in Figure 1.
, (G), ... jump signal code (f
') and the jumping signal code (r') at the position of the field (D), the same, . . . , the reproduction transducer I20 uses these as clues.
), the field (Lo),
Since the images can be reproduced in the order of (R1)-(L2)-(R3), (L4), . . . , a stereoscopic image can also be obtained in this case.

Also, if jumping control is performed using the jumping signal code (r'), the fields (Lo)-(Ll), (
It can be played in the order of L2)-(L3)-(L4),...
It is also possible to obtain normal images. Furthermore, in order to obtain such stereoscopic or ordinary images, both the jumping signal code (f') and (r') are not necessarily required, and it is also possible to obtain only the jumping signal code (f'). It is also possible to use a method such as using the track number as described above.

Furthermore, as is clear from the above, by recording all four types of jumping signal codes (f), (rL (f') + (r'), or any three, two, or one type, as described above, It is also possible to obtain various forms of reproduction.

Furthermore, although an example has been described above in which still playback of stereoscopic video or normal video is obtained from the disc (1), other special playbacks such as slow play and quick-reverse playback can also be easily obtained.

[Effects of the Invention] As described above, according to the first aspect of the present invention, the first video signal and the second video signal are recorded alternately in units of one frame to form a spiral recording track. When playing a disc that has been recorded, the jumping controller causes the signal reader to play up to half a frame of the first video signal track and then start playing from the adjacent half frame of the second video signal track. Therefore, it is possible to realize a video playback device that can play back stereoscopic video.

According to the second aspect of the present invention, the first video signal and the second video signal are alternately recorded in units of one frame to form a spiral recording track. When the signal reader reproduces up to the end of one frame of one video signal track by the re-jumping controller, it then starts playing from the start of one frame of the other adjacent track of the one video signal. It is possible to realize a video playback device that can satisfactorily play back normal video from a disc on which stereoscopic video is recorded.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a video reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view showing a stereoscopic video recording disk according to an embodiment of the present invention, and FIG. 3 is a plan view showing a stereoscopic video recording disk according to an embodiment of the present invention. A configuration diagram showing a recording system - Fig. 4 is an operation waveform diagram showing the operation of this recording system, Fig. 5 (a),
(b) is a diagram showing a track scanning locus and its reproduction signal for reproducing a stereoscopic image from a disk of the video reproducing apparatus according to the present invention, and FIG. FIGS. 7(a) and 7(b) are diagrams showing track scanning trajectories and their reproduction signals for reproducing normal video from a disc of the video reproducing apparatus according to the present invention. The figure is a diagram showing a truck set meal locus for reproducing normal still images from a disc of the video reproducing device according to the present invention, FIG. 9 is a block diagram showing a conventional video reproducing device, and FIG. 10 is a diagram showing a conventional video reproducing device. FIG. 11 is a plan view showing a related disk, and a configuration diagram showing a conventional system for recording video signals on a disk. (1) is the disk - (2) is the recording track, (RO),
(kl)... is the field of the first video signal corresponding to the right eye, (LO), (Ll)... is the field of the second video signal corresponding to the left eye, and (r
) are respectively the first and second jumping signal codes -
(20) is a signal reader, (3υ is a tracking controller)
142 is an adder, a jumping controller, a selector switch, and an identification signal detector.

Claims (4)

[Claims] (1) a signal reader that reads first and second video signals sequentially recorded on a disk so as to form a spiral track alternately every frame, and an identification signal recorded in the track; an identification signal detector that detects the identification signal read by the signal reader; and when the identification signal detector detects the identification signal, the reading position of the signal reader is set to the first and second video signals; A video playback device comprising a jumping controller for moving from a half-frame position of one video signal track to a half-frame position of another video signal track. (2) The video reproducing apparatus according to claim 1, wherein the identification signal detector detects an identification signal recorded superimposed on a synchronization signal in a video signal. (3) a signal reader that reads the first and second video signals sequentially recorded on the disk so as to form a spiral track alternately for each frame, and the identification signal recorded in the track; an identification signal detector that detects the identification signal read by the signal reader; and when the identification signal detector detects the identification signal, the reading position of the signal reader is set to the first and second video signals; A video playback device that moves from the end of one frame of a track of one video signal to the start of one frame of the next track of this one video signal. (4) The video reproducing apparatus according to claim 3, wherein the identification signal detector detects the identification signal recorded on the disc in a manner superimposed on a synchronization signal in the video signal.