JPH08307905A - Recording device - Google Patents

Abstract

PURPOSE: To record/reproduce a solid picture into high quality. CONSTITUTION: Double scan cameras 101 and 102 supply the picture signal (double scan signal) of 525×60 frames/second to a 3D encoding circuit 103 in accordance with a synchronizing signal from VTR 104 of two systems simultaneous recording/reproduction. In the circuit 103, a selection circuit 108 switches two double scan signals in a frame unit and supplies them to an interlacing conversion circuit 110 through an A/D converter 109. The circuit 110 interlacing- converts the double scan signals into an odd field and an even field, and supplies an odd field signal to the channel 1 of VTR 104 and an even field signal to a channel 2. A 3D decoding circuit 105 converts the reproduction signal of two channels from VTR 104 into the double scan signal of one frame and supplies it to a double scan monitor 106. A 3D glass driver circuit 113 drives a 3D glass 107 in accordance with a vertical synchronizing signal from VTR 104.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for recording / reproducing image signals.

[0002]

2. Description of the Related Art Conventionally, signals obtained by camera inputs of two systems are simultaneously recorded on the same recording medium, and each reproduced image of two systems is observed only by one eye corresponding to an observer during reproduction. A configuration for realizing stereoscopic vision by using such a mask using, for example, a liquid crystal shutter is known. In this case, it is necessary to reduce the image data amount to 1/2 in order to simultaneously record the signals of the two systems, and the signals of each system are thinned out every other field.

When a normal image is reproduced from a signal recorded for a stereoscopic image as described above, signals on one side are thinned out every other field and the vertical resolution is halved. By adding the decimated field only to the signal of the system of, and making the total data amount of 3/2,
The image quality was maintained.

[0004]

However, in the conventional configuration, the vertical resolution of the stereoscopic image that can be observed is 1/2 and the frame frequency is also 1/2, so that the image quality is lower than the normal image and the flicker is low. This results in a reproduced image with a lot of noise, and a great deal of visual fatigue is associated with long-term observation.

Therefore, an object of the present invention is to provide a recording / reproducing apparatus capable of recording / reproducing a stereoscopic image with higher quality.

[0006]

A recording / reproducing apparatus according to the present invention includes a 3D encoding circuit for forming a stereoscopic image signal from image signals from two cameras, and a data amount of the stereoscopic image signal from the 3D encoding circuit. And an image recording / reproducing means for compressing and recording the same in 1/2 without degrading the vertical resolution, and a 3D decoding circuit for converting a stereoscopic image signal reproduced by the image recording / reproducing means into a stereoscopic displayable signal format. To do.

Since the stereoscopic image signal can be recorded by the image recording / reproducing means without lowering the vertical resolution, a high quality stereoscopic image can be observed by converting the reproduced signal into a signal by the 3D decoding circuit for display.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the configuration of a stereoscopic image recording and reproducing apparatus using an embodiment of the present invention.

Referring to FIG. 1, a double scan camera 10 is shown.
1, 102 are dual-system simultaneous recording / reproducing apparatus (VTR) 104
An image signal of 525 lines × 60 frames / second (called a double scan signal) is supplied to the 3D encoding circuit 103 in accordance with the synchronization signal supplied from 3D encoding circuit 10
In 3, the selection circuit 108 switches between the double scan signals in frame units according to the synchronization signal from the VTR 104, and the A / D converter 109 converts it into a digital signal and supplies it to the interlace conversion circuit 110. The interlace conversion circuit 110 interlace-converts the double scan signal into an odd field and an even field, and supplies the two input terminals of the VTR 104, for example, the odd field signal to ch1 and the even field signal to ch2. That is, the VTR 104 is the double scan camera 101, 102 selected by the 3D encoding circuit 103.
The frame signal from one side is divided into ch1 and ch2 and simultaneously recorded. Details of this simultaneous recording will be described later.

The two output signals reproduced from the VTR 104 are supplied to the 3D decoding circuit 105. VTR1
The reproduction operation of 04 will be described later. In the 3D decoding circuit 105, the field-divided double scan signal, which is a double scan signal from the VTR 104, is converted into a double scan signal of one frame by the scan converter 111, and an analog double scan signal by the D / A converter 112. And is supplied to the double scan monitor 106. Three
3D glass driver circuit 11 of D decoding circuit 105
3 is 3D according to the vertical sync signal from the VTR 104.
Drive the glass 107. The 3D glass is, for example, a stereoscopic image observation device having independent liquid crystal shutters on the left and right, and for example, when the image of the camera 101 is displayed on the monitor 106, the right shutter is opened and the image of the camera 102 is displayed. Sometimes the left shutter opens,
The images of the cameras 101 and 102 are made to independently enter the left and right eyes of the observer.

When an image recorded as a stereoscopic image is reproduced on a normal screen, the 2D decoding circuit 114
To use. That is, the selection circuit 116 causes the CTR of the VTR 104 to
By switching the h1 output and the signal obtained by delaying the ch2 output by one field by the field delay circuit 115 for each field, the image of the camera 101 or the image of the camera 102 can be independently taken out as an interlaced signal. The interlaced signal may be converted into an analog signal by the D / A converter 117 and applied to the NTSC monitor device 118.

In the above structure, the double scan camera 1
For example, a stereoscopic image having a three-dimensional depth can be recorded by capturing the images 01 and 102 at intervals equal to the left and right parallax of a human and recording them in the VTR 104.
Further, compared with the case where the reproduced image of the conventional stereoscopic image display device is a field image display with a vertical resolution of 262 lines for one eye, the reproduced image according to the above-described embodiment can obtain 526 frame images for one eye, and thus the vertical image is displayed. Enjoy high-quality stereoscopic images with no reduction in resolution.

FIG. 2 shows a concrete configuration example of the VTR 104. The VTR shown in the figure has, as operation modes, a two-system input recording mode that enables recording and reproduction of a stereoscopic image, a standard mode that gives priority to image quality, and a long-time mode that gives priority to recording time. In the standard mode, the switches 22 and 58 are connected to the a contact, in the long time mode, to the b contact, and in the two-system input recording mode, connected to the c contact. Since the operation in the standard mode and the operation in the long time mode are not directly related to the present invention, the description thereof will be omitted except the relevant portions. In addition,
FIG. 4A shows a recording format in the standard mode, in which one field of a video signal having a field frequency of 60 Hz is recorded on four tracks. In the long time mode, recording is performed only by the heads 36 and 37, and the recording format is as shown in FIG.

In the dual input recording mode, the switch 2
2, 58 are connected to the c contacts. The video signal input to the input terminal 10A is thinned out by the sub-sampling circuit 14A by a field offset or a line offset, and 2fsc (fsc is a color subcarrier frequency of NTSC system).
Compressed to a sampling rate signal of scale /
Applied to the index (S / I) encoding circuit 16A,
The amount of data is half.

The S / I coding circuit 16A is a circuit for performing scale / index coding, and is generally MIN-
The MAX method is famous. In the MIN-MAX method, an image is divided into blocks, and the maximum value and the minimum value in the block are equally divided and quantized. By transmitting an index indicating which quantization level belongs to each pixel and further transmitting the maximum value / minimum value as a scale component, it is possible to reproduce the quantization representative value on the receiving side. For example, 16 (= 4 ×
4) Pixel is set as 1 block, maximum value / minimum value is 8 bits for each scale component, and all 16 pixels are assigned 8 bits by assigning a 3-bit index obtained by dividing the maximum value / minimum value into 8 The information amount of 128 bits / block when quantized with bits is half (64 (=
2 × 8 + 16 × 3) bits / block.

The signal whose data amount has been halved by the S / I encoding circuit 16A is time-axis compressed by the time-axis conversion circuit 18 as shown in FIG. On the other hand, the ch2 video signal of the input terminal 10B is subjected to the same processing as the video signal of the input terminal 10A by the sub-sampling circuit 14B and the S / I encoding circuit 16B, and then supplied to the synthesizing circuit 20. The combining circuit 20 is composed of a time axis conversion circuit and a switching circuit, and combines both inputs. The combined signal has the same data rate as the output of the sub-sampling circuit 14A, and is distributed via the switch 22 to the distribution circuit 2
4 is supplied.

The distribution circuit 24 distributes the signal from the switch 22 into two systems. The signals distributed into the two systems by the distribution circuit 24 are respectively ECC coding circuits 26A and 26B.
And a switch 30A via the modulation circuits 28A and 28B,
Supplied to 30B. ECC encoding circuits 26A and 26B
Performs error detection / correction code addition, interleaving, etc., and the modulation circuits 28A and 28B convert the signals into a signal having a small DC component suitable for digital recording.

Reference numerals 32 to 35 are recording amplifiers, 36 to 39 are heads, and 40 is a magnetic tape. Switches 30A, 30
B switches at the a and b contacts every 1/120 second. The arrangement of the magnetic heads 36 to 39 is shown in FIG. In FIG. 3, reference numeral 72 designates a rotary head drum. 3A is a plan view of the rotary drum 72 seen from above, and FIG. 3B is a layout view of the heads 36 to 39 seen from the side surface of the drum 72. Same as head 36 3
7 constitutes a pair head, head 36 is + azimuth,
The head 37 is −azimuth and, as shown in FIG. 3B, its height differs by one track pitch ( _TP ). The heads 38 and 39 have the same relationship as the heads 36 and 37, and these two pairs of heads face each other at an interval of 180 degrees. Rotating head / drum 72 is 3,600r
It rotates at pm and the magnetic tape 40 has about 180 ° on its outer circumference.
It is wrapped around.

The synthesizing circuit 20 is composed of the pair head 3
6 and 37 are supplied with the video signal of ch1, and the pair heads 37 and 38 are supplied with the video signal of ch2, so that the signal of ch1 is not supplied (T _{1 to} T ₂ in FIG. 5,
T ₃ through T _4, a signal of the ch2 in.) To compress the time axis, Figure 5
The signal of ch1 shown in (2) and the signal of ch2 shown in FIG. 5 (3) are switched to obtain the signal of the standard mode data rate shown in FIG. 6 (1). The recording format of the magnetic tape is the same as in the standard mode as shown in FIG.

The time of reproduction will be described. Magnetic head 36-39
The signal reproduced from the magnetic tape 40 is applied to the switches 48A and 48B via the reproduction amplifiers 44 to 47. The switches 48A and 48B are set to 1/12 as in recording.
It is switched between the a contact and the b contact at a cycle of 0 seconds. The detection circuits 50A and 50B are composed of a waveform equalizer, a clock regenerator, and a discriminator. By comparing the voltages at the bit times obtained from the clock regenerator, the discriminator compares "0" and "1". Determine. The demodulators 52A and 52B demodulate the outputs of the detection circuits 50A and 50B, and the ECC decoding circuits 54A and 54B perform error detection / correction and deinterleave processing. The synthesizing circuit 56 synthesizes the outputs of the ECC decoding circuits 54A and 54B and outputs them as a signal of one system.

The output of the synthesizing circuit 56 is c of the switch 58.
It is supplied to the distribution circuit 60 via the contact. The distribution circuit 60 is composed of a switching circuit and a time axis conversion circuit, outputs the reproduction signals from the heads 36 and 37 to the time axis conversion circuit 62, expands the reproduction signals from the heads 38 and 39 in the time axis, and performs S / I. Output to the decoding circuit 64B. Time axis conversion circuit 62
Extends the input signal on the time axis. S / I decoding circuit 64A
Decodes the output data of the time axis conversion circuit 62 into a representative value of 8 bits per sample, performs block raster conversion, and outputs. The interpolation circuit 66A is the sub-sampling circuit 1
The data decimated by 4A is interpolated. The S / I decoding circuit 64B and the interpolation circuit 66B also perform the same processing as described above.

As another embodiment of the present invention, 262 lines × 6
An image of 262 × 120 fields / second (hereinafter referred to as a double-cycle image) is recorded by using two cameras that output an image signal of 0 field / second (hereinafter referred to as an NTSC signal).
The configuration to be displayed will be described.

FIG. 6 is a block diagram of the recording system / reproducing system, in which the NTSC cameras 601 and 602 are NTSC according to the synchronizing signal supplied from the 3D encoding circuit 603.
The signal is supplied to the 3D encoding circuit 603. However, the synchronization signal supplied to the camera 602 is delayed by the delay circuit 609 by ½ of the field period. As a result, the field signals output from the cameras 601 and 602 are displaced by 1/120 second as shown in FIG. NT supplied to the 3D encoding circuit 603
The SC signal is converted into a digital signal by A / D converters 606 and 607. The output of the A / D converter 606 is delayed by 1/120 seconds by the field memory 608, so that the output signals of the cameras 601 and 602 are synchronously applied to the two-channel simultaneous recording / reproducing device (VTR) 104. , Will be recorded. The configuration of the VTR 104 is V in FIG.
Same as TR104.

At the time of reproducing a stereoscopic image, the two outputs of the VTR 104 are supplied to the 3D decoding circuit 604, and in the 3D decoding circuit 604, the signals of the two channels are stored in the field memories 610 and 611 for speed conversion. After that, by the double-cycle vertical synchronizing signal from the VTR 104, it is switched in the field unit by the selection circuit 612 and applied to the D / A converter 613 as a double-cycle signal. The D / A converter 613 supplies the analog signal output to the double cycle monitor (262 lines × 120 fields / sec) 605. The switching in the selection circuit 612 is performed corresponding to the delay relationship at the time of capturing the camera output (that is, recording in the VTR 104), and the display on the double cycle monitor 605 is as shown in FIG. 7B.

The 3D glasses driver circuit 614 of the 3D decoding circuit 604 simultaneously controls the driving of the 3D glasses 615 according to the double cycle vertical synchronizing signal from the VTR 104. The 3D glasses 615 open and close the left-eye and right-eye shutters in synchronization with the switching in the selection circuit 612, as in the above-described embodiment, and allow the observer to observe a reproduced image as shown in FIG. 7A.

When it is desired to observe as a normal image, VT
It suffices to select one of the two systems output of R104 by the selection circuit 616, convert it into an analog signal by the D / A converter 617, and apply it to the NTSC monitor 618.

In the embodiment shown in FIG. 6, the image viewed with one eye is 262 lines × 60 fields / sec, which is the same as in the current NTSC system, so that stereoscopic image display with less flicker can be realized.

Note that the present invention is not limited to the above-described embodiment, and by simultaneously recording a plurality of signals in which binocular parallax is taken into consideration, it is possible to stereoscopically display even a signal such as a computer graphics image. it can. In addition, by using a projector, a display, or the like that can simultaneously display polarized light for each channel, a stereoscopic image can be observed with polarized glasses having different left and right polarization angles.

[0030]

As can be seen from the above description, according to the present invention, a high quality stereoscopic image can be displayed.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a dual-system simultaneous recording / reproducing device 104 shown in FIG.

FIG. 3 is a layout view of a reproducing / recording head.

FIG. 4 is a diagram showing a recording track pattern of a magnetic tape.

FIG. 5 is a timing diagram of head switching.

FIG. 6 is a configuration block diagram of another embodiment.

7 is an example of the display timing of FIG.

[Explanation of symbols]

 101, 102: Double scan camera 103, 603: 3D encoding circuit 104: Two-system simultaneous recording / reproducing device (VTR) 104, 604: 3D decoding circuit

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 14, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

[Title of Invention A recording apparatus

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

BACKGROUND OF THE INVENTION The present invention is, the serial a three-dimensional image signal
Recording device for recording

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005] Therefore, an object of the present invention to present a recording device capable of recording a stereoscopic image with a higher quality.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

[0006]

A recording apparatus according to the present invention is an image pickup means for generating image signals for right and left eyes.
And an image signal generated by the image pickup means,
Compressing means for compressing without dropping the number, and said compressing means
A recording means for recording the image signal compressed by
It is characterized by

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

In this way, the number of scanning lines can be increased without decreasing.
Since the body image signal is recorded, it is possible to obtain a high-quality stereoscopic image.
Can be.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

[0030]

As can be easily understood from the above description, according to the present invention, a stereoscopic image can be displayed without reducing the number of scanning lines.
Since image signals are recorded, high-quality stereoscopic images can be obtained.
it can.

Front Page Continuation (72) Inventor Shin Shimokoriyama, Shinano Maruko 3-30-2, Ota-ku, Tokyo Canon Co., Ltd. Inside the Tamagawa Office

Claims (1)

[Claims] 1. A 3D encoding circuit that forms a stereoscopic image signal from image signals from two cameras, and a data amount of the stereoscopic image signal from the 3D encoding circuit is compressed to 1/2 without lowering the vertical resolution. And a 3D decoding circuit for converting a stereoscopic image signal reproduced by the image recording / reproducing means into a stereoscopically displayable signal format.