JPH0779454A - Stereoscopic video image recording method - Google Patents

Abstract

PURPOSE:To attain the recording of a stereoscopic video image having compatibility with an existing 2-dimension video image VTR by alternately recording right eye and left eye signals at an inverse azimuth for each pitch a half of a track pitch of a VHS or 8mm system. CONSTITUTION:Left eye signals Ln+2, Ln+1 and Ln are received from a terminal 51 and right eye signals Rn+2, Rn+1 and Rn are received from a terminal 52. Even and odd numbered fields of the received left eye signals are fed respectively to heads A0, A1 and even and odd numbered fields of the received right eye signals are fed respectively to heads B0, B1. Signals via a signal changeover circuit 6 pass through a delay circuit when it is available or are received as they are in the heads A0, A1, B0, B1 via format converters 71, 72 and REC Amps 91, 92 and recorded sequentially. The reverse processing is executed at the time of reproduction to that at the time of recording.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording a stereoscopic video signal.

[0002]

2. Description of the Related Art In recent years, technological development relating to stereoscopic image technology has become popular, and a method in which a viewer views the image for the right eye and the image for the left eye with eyeglasses equipped with a shutter mechanism or a lenticular screen is used. A method in which the right-eye image is adjusted to the viewer's right eye and the left-eye image is adjusted to fit in the viewer's left eye so that the viewer can directly enjoy stereoscopic images without using glasses. Various things are appearing.

By the way, the information of the right-eye image and the left-eye image is generally recorded by using a normal VTR (Video Tape Recorde) to record the information photographed by two cameras for the left eye and the right eye.
r) Format is recorded on two recording media (for example, magnetic tape), two reproducing players are synchronously operated at the time of reproduction, and the left and right images are overlapped and displayed. One of the signals is recorded as the main signal, the difference signal between the left and right video signals is recorded on the same recording medium, and the video signals for the right and left eyes are reproduced and displayed from the main signal and the difference signal during reproduction. There are ways.

[0004]

In the prior art relating to the above-mentioned recording method, when recording video signals for the right eye and the left eye on two recording media, each recording medium has a normal V
Since the signal is recorded in the TR format, it is compatible with general VTRs, but a special control method for operating two playback players in synchronization is required,
There was a problem that the hardware configuration became complicated.

Further, in a system in which a main signal consisting of a signal for either the left or right eye and a difference signal between the left and right signals are recorded on a single recording medium, a general VTR format (V
There is a problem that it is not compatible with the HS system or the 8 mm system, and the recorded video information cannot be viewed without a dedicated stereoscopic video reproduction system.

[0006] The problem to be solved by the present invention is to develop a stereoscopic video recording method compatible with the existing 2D video VTR in view of the problems of these conventional stereoscopic video recording methods.

[0007]

The first aspect of the present invention is to provide the signals R1 to Rn for the right eye and the signals for the left eye for each recording track having a half pitch of the recording track pitch of the VHS system or the 8 mm system of the magnetic tape. The signals L1 to Ln are reverse azimuth for each adjacent track and L1, R1, R2, L2, L3, R3 ... With respect to the running direction of the tape.
It is a method of recording so that

A second aspect of the present invention is the VHS of a magnetic tape.
The first right-eye signals R1 to Rn and the first left-eye signals L1 to Ln for each adjacent track in the main signal recording area of the recording track having a half pitch of the recording track pitch of the recording method or the 8 mm method. L1, R1, R2, L2, L3, which are reverse azimuth with respect to the running direction of the tape,
R3 ... is recorded so that the second right eye signals R'1 to R'n and the first right eye signals R1 to R are recorded.
n difference signal R'1-R1 to R'n-Rn or second
Left eye signals L'1 to L'n and the first left eye signal L
The difference signals L'1-L1 to L'n-Ln with respect to 1 to Ln are recorded in the overlap area of the recording track corresponding to the signal for the right eye or the signal for the left eye recorded in the main signal recording area. It is a method to do.

[0009]

According to the above-mentioned structure, during the normal VHS system reproduction, either the right eye signal or the left eye signal, that is, R1, R2 ... Or L1, L2. The magnetic tape recorded by the three-dimensional VTR recording system can be reproduced by the two-dimensional VTR reproducing player, and the tape recorded by the two-dimensional VTR can be reproduced by the three-dimensional VTR reproducing player. , L or R output terminals can reproduce a two-dimensional image, and compatibility between a stereoscopic image and a two-dimensional image occurs.

Further, the first and second areas are provided in the overlap area.
By recording the difference signal of the left-eye or right-eye video signal, compatibility between the binocular stereoscopic video information and the four-eye stereoscopic video information can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the stereoscopic image recording method of the present invention will be described in detail below with reference to the drawings. [First Embodiment] FIG. 1 is a diagram showing a first embodiment of a recording format for a magnetic tape as a recording medium. In the figure, 1 is a magnetic tape, 2 is an audio track for recording audio signals set on the upper part of the magnetic tape 1, and 3 is a control track for recording control signals set on the lower part of the magnetic tape 1.

Reference numeral 4 is a recording track for recording a video signal, and right-eye video signal R1 for stereoscopic video is recorded on tracks 41, 42 ... With a half pitch of the track pitch of VHS.
.. and left-eye video signals L1, L2, ... Change their azimuths in adjacent tracks, and the recording order is L1, R1, R2, L2, L3, as shown in the figure.
It is recorded in the order such as R3 ....

Needless to say, sync signals are recorded on the tracks 41, 42, .... Also, the hatching directions shown on the tracks indicate that the azimuths are different.

Next, FIG. 2 is a block diagram of a signal processing circuit for recording and reproducing in the format of FIG. However, the video signal for the right eye will be described as the main signal.

In the recording system in the upper half of FIG.
2 are left-eye video signals Ln + 2, Ln + 1, Ln (n
Is a natural number: the input terminal of the input order is reverse) and the input terminals of the right-eye video signals Rn + 2, Rn + 1, Rn (the input order is reverse), 6 is the video input signal from each of the input terminals 51 and 52 Rearranged to Ln + 2, Rn + 1, L respectively
It is a signal switching circuit that generates signals in the order of n, Rn + 2, Ln + 1, and Rn.

By the way, as shown in FIG. 3, in the recording / reproducing head, two sets of opposing heads A0, A1, B0, B1 are provided on the rotary drum D at the same azimuth of 180 °. As for the positional relationship of the heads at this time, generally, if two common head parts are used as shown in FIG. 4 (a), the distance between the heads of the two heads at the same position or double azimuth after the signal switching circuit 6 is set. A delay circuit 8 for compensation is required. However, if a symmetrical head component is used as shown in FIG. 3B, the delay circuit is not necessary.

Reference numerals 71 and 72 are format converters for converting the respective signals output from the signal switching circuit 6 or the delay circuit 8 into a preset magnetic tape recording format for stereoscopic images, and 91 and 92 are format converted. REC AMPs 101 and 102 for amplifying the signals are magnetic heads for recording corresponding to the above A0, A1 and B0, B1.

Next, the reproducing system in the lower half of FIG. 2 will be described. Basically, the reverse processing of the signal processing of the recording system is performed, 101 and 102 are reproducing magnetic heads (the same as the above recording magnetic head), and 111 and 112 amplify each reproduced signal. PB AMP, 121 and 122 are AMP
A signal conversion circuit for converting the signals output from 111 and 112 into video signals, a signal switching circuit 123 for separating the video signals output from the conversion circuits 121 and 122 into a video signal for the right eye and a video signal for the left eye, Reference numerals 53 and 54 denote a right-eye video signal output terminal and a left-eye video signal output terminal for outputting the signals R and L for outputting a left-eye reproduction signal and a right-eye reproduction signal, respectively.

In the stereoscopic video recording method configured as described above, the left eye signals Ln + 2, Ln + 1,
Ln, right eye signals Rn + 2, Rn + 1, R from terminal 52
n is input respectively.

In the signal switching circuit 6, the left eye signals Ln, Ln + 1, Ln + 2, ...
Right eye signals R, Rn + 1, Rn + 2.
.. to Ln, Rn + 1, Ln + 2, ... Heads A0 and A1, and Rn, Ln + 1, Rn + 2, Ln + 3 ,.
.. is switched to be supplied to the heads B0 and B1. By doing so, finally, the head A0 has an even field of the left eye signal L, the head A1 has an odd field of the right eye signal R, and the head B0 has a right eye signal R.
, And the odd field of the left-eye signal L is supplied to the head B1.

The signal that has passed through the signal switching circuit 6 passes through the delay circuit 8 if there is one, and if it does not exist, it is input to the format converters 71 and 72 as it is, converted into a recording format signal, and then converted to the conventional format. Recording is performed sequentially using the heads A0, A1, B0, and B1 for each field at the same VHS tape feed speed and drum rotation speed.

At the time of reproduction, the reverse process of the above recording is performed,
A video signal for the left eye is reproduced at the terminal 53 and a video signal for the right eye is reproduced at the terminal 54. By performing such signal processing, FIG.
Such recording on the tape 1 can be performed.

In the above construction, two sets of opposed heads are prepared and the tape feed speed and the drum rotation speed are the same as those of the conventional VTR. However, one set of opposed heads is used for the left eye and the right eye. The same effect can be obtained with a configuration in which the signal of 2 is time-axis compressed to double the number of rotations of the drum and recording / reproduction is performed in the format of FIG.

In this case, however, in the signal processing circuit of FIG. 2, the time axis compression circuit is replaced by the signal switching circuit (recording side) 6
, The time axis expansion circuit is connected to the signal switching circuit (reproduction side) 12
Must be placed after 3. [Second Embodiment] FIG. 5 is a diagram showing a recording format for achieving compatibility between the binocular stereoscopic video information and the four-eye stereoscopic video information. In FIG. 5, the main part of 180 ° section of each recording track is shown. Since the signal recording area is the same as that of the first embodiment, detailed description will be omitted here.

In the second embodiment, a four-eye type stereoscopic image corresponding to the signal for the right eye or the signal for the left eye recorded in the main signal area in the overlap area 43 excluding the main signal area of the recording track. The difference signal between the first and second signals for the first and second right-eye or left-eye signals necessary for information is recorded.

That is, taking the recording track at the left end of the drawing as an example, since the first left-eye signal L1 is recorded in this main signal recording area, the first overlap signal is recorded in the corresponding overlap area.
A difference signal L ′ between the left-eye signal L1 and the second left-eye signal L′ 1
1-L1 will be recorded.

In the adjacent recording track, the first right eye signal R1 is recorded in the main signal recording area, so that the first right eye signal R1 and the second right eye signal R1 are recorded in the corresponding overlap area. The difference signals R'1-R1 from the signal R'1 will be recorded.

In this way, each recording track 41, 42
The difference signals L'1-L1 and R'1 in the overlap region of
-R1, R'2-R2, L'2-L2, L'3-L3,
It is recorded as R'3-R3 ...

During reproduction, the main recording area and the overlap area are both scanned by the reproducing head, and the information is read to reproduce the first and second right-eye or left-eye signals. It is possible to play back stereoscopic images.

Further, during reproduction, only the main recording area is scanned by the reproduction head and the information is read to reproduce the first right-eye or left-eye signal, thereby reproducing the two-eye stereoscopic image. You can

Further, at the time of reproduction, only one azimuth track in the main recording area is scanned by the reproduction head of the two-dimensional VTR and the information is read, whereby the two-dimensional image can be reproduced.

[0032]

As described above, when a tape recorded by the recording / reproducing method of the present invention is reproduced by a conventional VTR, either the left eye or the right eye is recorded due to the azimuth relationship. It is possible to reproduce only the signal that has been reproduced.

On the contrary, when the tape recorded by the conventional VTR is reproduced by the recording / reproducing method of the present invention, the tape is reproduced by the head of either the left eye or the right eye and the left eye. The reproduction signal is output to either the output terminal of the right eye or the output terminal for the right eye.

As a result, it is expected that the recording and reproducing compatibility between the upper (stereoscopic image) to the lower (two-dimensional image) and the lower to the upper is produced.

Further, if the difference signal between the first and second right-eye and left-eye signals is recorded in the overlap area, the twin-lens type to 4
The effect that interchangeability of eye type stereoscopic images is also expected can be expected.

[Brief description of drawings]

FIG. 1 is a diagram showing a recording format on a magnetic tape for explaining a stereoscopic image recording method of the present invention.

2 is a block diagram showing signal processing of a recording system and a reproducing system for realizing the recording format of FIG.

FIG. 3 is a schematic top view of the head of FIG.

4A and 4B are schematic side views of examples of different heads.

FIG. 5 is a diagram showing another embodiment of the stereoscopic image recording method of the present invention.

[Explanation of symbols]

 1 magnetic tape 4 video signal recording signal track 6,123 signal switching circuit 71, 72 format converter 101, 102 heads A0, A1, B0, B1 121, 122 signal conversion circuit 43 overlap area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Kume 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A right-eye signal R1 to Rn and a left-eye signal L1 to Ln on a recording track having a half pitch of a VHS or 8 mm recording track pitch of a magnetic tape.
Are reverse azimuths for adjacent tracks and L1, R1, R2, L2, with respect to the running direction of the tape.
A stereoscopic video recording method, wherein recording is performed so that L3, R3, ... 2. A first right eye signal R1 to Rn and a first left eye signal L1 in a main signal recording area of a recording track having a half recording pitch of a VHS or 8 mm recording track of a magnetic tape. -Ln are recorded in such a manner that the adjacent tracks have opposite azimuths and are L1, R1, R2, L2, L3, R3 ... With respect to the tape running direction, and the second right eye is recorded. Signals R'1 to R '
n and the first right-eye signals R1 to Rn, a difference signal R'1
-R1 to R'n-Rn or second left-eye signal L'1
To L'n and the first left-eye signals L1 to Ln, the difference signals L'1-L1 to L'n-Ln are recorded in the main signal recording area for the right eye signal or the left eye signal. The stereoscopic video recording method is characterized in that the recording is performed in the overlap area of the recording track corresponding to the above.