JPH08172645A - Stereoscopic information recording medium and stereoscopic information recorder - Google Patents

Abstract

PURPOSE: To record video and audio data even at a large compression data rate in the unit of image or between images onto a high density recording disk by recording the compressed video and audio data of two channels of which the reproduction transfer rate is respectively variable and the sum is fixed onto the disk. CONSTITUTION: Image and audio coding means 1R, 1L and 1A encode right, left images and audio inputs R, L, A of an object into compression code data C, which are stored in code buffers 2R, 2L, 2A. When the storage capacity of data C in each buffer reaches a prescribed capacity or over, a code selection means 3 controls a switch means 4 to provide an output of the data C to a multiplexer means 5. The multiplexed data C outputted from the means 5 are recorded on an optical disk in a CD-ROM format so as to attain a speed of a multiple of four at reproduction. The reproduced signal is distributed into the signals R, L, A by a code discrimination means and the signals are decoded by using a decoding buffer and image and audio decoding means. Thus, even when the data are recorded by the MPEG system or the data compression rate in the unit of images or between image is high, the data are recorded on the disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to stereoscopic information in which a plurality of image data obtained by simultaneously photographing a subject from a plurality of directions are compression-encoded and recorded at a high density to obtain a stereoscopic moving image by reproduction. The present invention relates to a recording medium and a stereoscopic information recording apparatus thereof.

[0002]

2. Description of the Related Art Conventionally, various methods have been provided as methods for forming a stereoscopic moving image. The most common method is to alternately display images for the left eye and the right eye, which correspond to human eyes, in an image output device such as a television, and to use shutter glasses such as a liquid crystal shutter. . This method applies binocular parallax of the human eye. In order to obtain a stereoscopic moving image by such a method, one TV camera is placed at each of the left and right eye positions of a human, the respective image data are alternately recorded on the recording medium, and these display methods are performed. As for, the image data of the image output device such as a television is set to interlace,
Image data is alternately displayed on the left and right for each field or field group, and in synchronization with the switching, a stereoscopic moving image is obtained by alternately switching the left and right shutters set at the positions of human eyes.

However, these image data usually require twice as much data amount as two-dimensional image data, so that the recording capacity and the scale of the reproducing device tend to be large. In particular, when these image data are digitized, weaknesses such as increase in data amount and processing time have been pointed out.

Further, since these image data are obtained by photographing an object from a plurality of directions, the plurality of image data have correlations with each other and have similar data values. There are many things that are. Therefore, each image data is based on specific approximately similar image data, other image data is compared and referred to this reference image data, and the difference in data value is obtained to reduce the data amount, that is, Compression can be enabled. As such reference image data for comparison reference, a method of using any one of a plurality of image data captured at the same time has been conventionally used. For example, Japanese Patent Laid-Open No. 64-19892 discloses a method of comparing and referring to image data on one side and compressing and encoding the image data on the other side.

On the other hand, a digital video compression coding system has been remarkably developed in recent years, and in particular, a compression coding technique called MPEG (ISO 11172) system standardized by ISO has been adopted in various fields. There is. This is digital moving image data, one image unit from several frames to a dozen frames, fields, etc. is compression-encoded within the image unit, and other image data is other image data, that is,
This is a method of performing compression coding by difference and motion compensation obtained by comparing and referring to image data and the like in temporally front and back or different shooting directions.

[0006] As another example of the compression coding method using such a method, for example, H.264 is used. 261 or H.261. 22
There is a standard for videophone such as 1 and the like, and according to this, the data amount can be compression-encoded from the original fraction to several tenths, and in some cases to several hundredths, and , Relatively high image quality is obtained.

There are provided digital stereoscopic moving image compression techniques to which these techniques are applied. For example, JP-A-64-
5290, JP-A-64-5291, and JP-A-64-5292, compression coding is performed by using intra-image unit intra-image compression encoding and inter-image-unit compression encoding separately, and compression encoding is also performed. A method of decoding and reproducing the encoded data is disclosed.

Further, in Japanese Patent Laid-Open No. 4-361499, when one of the left and right eye image signals is subjected to intra-image unit compression encoding or inter-image unit compression encoding, it is generated when compression encoding is performed first. There is disclosed a method of compression-encoding using the other predicted image signal.

[0009]

However, according to these techniques, a CD-recorded medium as a recording medium for compression-encoded data is used.
A ROM is used to record digital stereoscopic moving images on a 12 cm disc. However, even if the MPEG (ISO 11172) standardized by ISO is adopted, the amount of compression-encoded data that has been compression-encoded changes depending on the condition of the subject and the shooting condition, and a 12 cm disc is digitally stereoscopically recorded by the conventional technology. Even when a moving image is recorded, for example, the compression coded data amount changes depending on the ratio of the intra-image unit compressed data and the inter-image unit compressed data. It is assumed that the amount becomes large and a digital stereoscopic moving image cannot be recorded on one disc.

Therefore, according to the present invention, for example, stereoscopic information that can be recorded even if the ratio of compressed data within image unit / compressed data between image units becomes extremely large even if the MPEG system standardized by ISO is recorded. It is an object to provide a recording medium and a stereoscopic information recording apparatus therefor.

[0011]

A three-dimensional information recording medium according to a first aspect of the present invention is one in which three-dimensional image information is recorded on a high density recording disk.

According to a second aspect of the present invention, a stereoscopic information recording medium is obtained by recording data-compressed 2-channel video data and data-compressed 2-channel audio data on a high density recording disk.

According to a third aspect of the three-dimensional information recording medium, the two-channel video data and the two-channel audio data of the second aspect are fixed reproduction transfer rate data.

In the stereoscopic information recording medium according to claim 4, the 2-channel video data according to claim 2 is data of a variable reproduction transfer rate, and the sum thereof is a fixed reproduction transfer rate.

According to a fifth aspect of the stereoscopic information recording medium, the two-channel video data of the second aspect is data of a variable reproduction transfer rate, and the sum thereof is set to a maximum reproduction transfer rate or less. .

A stereoscopic information recording medium according to a sixth aspect of the present invention is one in which the video data of two channels according to any one of the third to fifth aspects is recorded at a reproduction transfer rate lower than the maximum reproduction transfer rate in a steady state. is there.

According to a seventh aspect of the present invention, in the stereoscopic information recording medium, the video data of two channels according to any one of the third to sixth aspects is reproduced at a maximum reproduction transfer rate or less in the initial state and higher than the reproduction transfer rate in the steady state. It was recorded closely at the transfer rate.

The stereoscopic information recording apparatus according to claim 8 is the stereoscopic information recording apparatus for recording data-compressed 2-channel video data and data-compressed 2-channel audio data on a high-density recording disk. The video data of the channel is recorded at a reproduction transfer rate lower than the maximum reproduction transfer rate in the steady state.

A stereoscopic information recording apparatus according to a ninth aspect is the stereoscopic information recording apparatus for recording data-compressed 2-channel video data and data-compressed 2-channel audio data on a high density recording disk. The video data of the channel is densely recorded at a reproduction transfer rate lower than the maximum reproduction transfer rate in the initial state and higher than the reproduction transfer rate in the steady state.

[0020]

According to the first aspect of the present invention, the amount of compression-encoded data for one disk is increased by recording the stereoscopic image information on the high density recording disk.

According to a second aspect of the present invention, the data-compressed 2-channel video data and the data-compressed 2-channel audio data are recorded on the high density recording disk, and the information necessary to obtain a realistic sensation is used as stereoscopic video information. To record.

According to a third aspect of the present invention, the 2-channel video data and the 2-channel audio data of the second aspect are set as data having a fixed reproduction transfer rate.
The configuration of the recording device is simplified.

According to a fourth aspect of the present invention, the two-channel video data of the second aspect is data of a variable reproduction transfer rate, and the sum thereof is a fixed reproduction transfer rate.
The bit rate of the video data of the channel is changed to give fluctuations suitable for ergonomics and improve the apparent image accuracy.

According to a fifth aspect of the present invention, the 2-channel video data of claim 2 is variable reproduction transfer rate data, the sum of which is set to a maximum reproduction transfer rate or less, and the bits of the 2-channel video data are mutually set. The rate is changed to give fluctuations suitable for ergonomics to improve the apparent image accuracy. Moreover, the bit rates of the video data of both channels can be simultaneously raised or lowered as needed.

According to a sixth aspect of the present invention, the video data of two channels according to any one of the third to fifth aspects is recorded at a reproduction transfer rate lower than the maximum reproduction transfer rate in a steady state to secure a margin of the reproduction transfer rate. To do.

According to a seventh aspect, the stereoscopic image information according to any one of the third to sixth aspects is densely recorded at a reproduction transfer rate which is equal to or lower than the maximum reproduction transfer rate in the initial state and higher than the steady state reproduction transfer rate. The rising speed accumulated in the buffer memory at the time of reproduction is set high.

According to the present invention, in the steady state, the 2-channel video data has a reproduction transfer rate lower than the maximum reproduction transfer rate in the steady state, and the 2-channel video data and the data-compressed 2-channel video data are compressed on the high density recording disk.
Record the audio data of the channel.

According to a ninth aspect of the present invention, 2-channel video data is densely compressed into a high-density recording disk at a reproduction reproduction rate lower than the maximum reproduction transfer rate and higher than a steady-state reproduction transfer rate in the initial state. Of the video data and the data-compressed 2-channel audio data are recorded.

[0029]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an overall schematic configuration of a stereoscopic information recording apparatus for a stereoscopic information recording medium which is a first embodiment of the present invention. 2 is an explanatory view showing a data sequence of a multiple signal output outputted by the stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the first embodiment of FIG. 1, and FIG. 3 is the stereoscopic information of the first embodiment of FIG. FIG. 6 is an output characteristic diagram of a fixed bit rate recorded by the stereoscopic information reproducing device of the recording medium. FIG. 4 is a block diagram showing the overall schematic configuration of the stereoscopic information reproducing apparatus for a stereoscopic information recording medium that is the first embodiment of the present invention.

In FIG. 1, 1R is image data for the right eye of a video camera or the like (hereinafter, simply referred to as "right image").
1L is image data for the left eye of a video camera or the like (hereinafter, this is simply referred to as “left image”).
Image coding means for inputting, and specifically, both are international standard MPEG (Moving Picture Experts Gross).
up) ISO / IEC 11172-2 (MPEG1), ISO / IEC
The MPEG compression coding method based on 13818-2 (MPEG2) is adopted.

Similarly, 1A is a voice encoding means for inputting the right voice data and the left voice data of the microphone,
As with images, specifically, both are international standard MPE.
G (Moving Picture Experts Group) ISO / IEC 111
72-3 (MPEG1), ISO / IEC 13818-3 (MPEG2) compliant MPEG compression coding system is adopted.

Reference numeral 2R is a code buffer for temporarily storing the compression coded data output from the image coding means 1R and outputting it when a predetermined storage amount is reached. Similarly, 2L is output from the image coding means 1L. It is a code buffer that temporarily stores the compressed and encoded data and outputs it when a predetermined storage amount is reached. Reference numeral 2A is a code buffer which temporarily stores the compression coded data output from the voice coding means 1A and outputs the compressed coded data when a predetermined storage amount is reached.

Numeral 3 is a code selecting means, which looks at the code buffer 2R, the code buffer 2L and the code buffer 2A, and when the compression coded data exceeds a predetermined accumulation, switches the switch means 4 for each sector and compresses it. The encoded data is output to the multiplexing means 5. The multiplexing means 5 obtains the selection information output of the code selection means 3, outputs the compressed coded data accumulated in the code buffer 2R, the code buffer 2L, and the code buffer 2A as a multiplexed signal, and a recording medium (not shown). Recorded in.

FIG. 2 shows an example in which compression encoded data is output as a multiplexed signal, where R is a right image signal, L is a left image signal,
A is a voice signal and P is padding data. In the example of this embodiment, the audio signal A is recorded in the initial state, and then the left image signal L and the right image signal R are output and recorded. Further, in the steady state, the left image signal L and the right image signal R are alternately output. In this steady state, in the present embodiment, as will be described later, the signal format is a CD-ROM format, and recording is performed so as to be reproduced at quadruple speed during reproduction. 2L, the padding data P, that is, the dummy code is inserted as needed when the recording amount of the compression coded data accumulated in the code buffer 2A is small.

That is, in the initial state of reproduction, the decoding buffer (8R, 8L, 8A described later) rises sharply, and padding data P as a dummy code is not inserted in order to increase the reproduction speed. However, in the steady state, in addition to the left image signal L, the right image signal R, and the audio signal A, if the amount of the left image signal L, the right image signal R, and the audio signal A in sector units is insufficient, padding is performed. Data P is inserted. By this, the repetition cycle a of the video data
The repetition cycle b of the audio data is always constant. Therefore, in the initial state, it is densely recorded at a reproduction transfer rate equal to or lower than the maximum reproduction transfer rate and higher than the reproduction transfer rate in the steady state.
R, 8L, 8A) makes the rising speed accumulated in the buffer memory composed of R, 8L, 8A) high to speed up the start of reproduction output of video data.

Further, in the steady state, the reproduction transfer rate lower than the maximum reproduction transfer rate of 4.8 Mbps is 4.224 M.
It is recorded at bps. So usually,
Even if the fixed playback transfer rate is 4.224, it is convenient for compression.
It may exceed Mbps, so if the playback transfer rate is set too high, the playback transfer rate will be 4.8 Mbps momentarily.
It is expected that it will exceed ps, and output will not be possible. Therefore, in order to secure a margin, dummy data called padding data is recorded in the empty area in the steady state.

As shown in FIG. 3, the bit rate BR of the two-channel video data, that is, the compression coded data output from the image coding means 1R, and the compression code output from the image coding means 1L. The bit rate BL of the encoded data is a fixed transfer rate of 2 Mbps.

Here, as a recording mode of the high density recording disk as the stereoscopic information recording medium of the present embodiment, the track pitch is 0.7 to 0.85 μm and the shortest pit length is 0.40 to 0.49 μm. It is an optical disc (12 cm disc), the signal format is a CD-ROM format, and is recorded so as to be reproduced at a quadruple speed during reproduction. Normally, 4.8 Mbps, which is four times 1.2 Mbps, is set as the highest data reproduction transfer rate. The reproduction transfer rate of video data is 2 Mbps on one side and the reproduction transfer rate of audio data is 0.112 Mbps, which is 4.224 Mbps in total.

In FIG. 4, reference numeral 6 is a code discriminating means for switching the switch means 7 by obtaining the selection information output from the multiple signal output read from the high density recording disk. The switch means 7 is a circuit for distributing the multiplexed signal to the right image signal R, the left image signal L, and the audio signal A by the code discrimination means 6. 8R is a decoding buffer for temporarily storing the input compression-coded data and outputting when a predetermined storage amount is reached.
Similarly, 8L is a decoding buffer that temporarily stores the input compression-coded data and outputs it when a predetermined storage amount is reached. Reference numeral 8A is a decoding buffer for temporarily storing the input compression-coded data and outputting it when a predetermined storage capacity is reached.

Reference numeral 9R is an image decoding means, and 9L is an image decoding means. Specifically, it receives the former MPEG compression coding and decodes it. Also, 9A is a voice decoding means, which receives and decodes MPEG compression coding like the image.

Next, the stereoscopic information recording and stereoscopic information reproducing operations of the stereoscopic information recording medium of this embodiment will be described.

First, the subject is photographed and the right image input R,
After obtaining the left image input L, the image encoding means 1R, the image encoding means 1L, and the audio encoding means 1A perform MPEG compression encoding at each specific bit rate, and encode each of the compression encoded data. The code buffer 2R, the code buffer 2L, and the code buffer 2 are selected by the selection unit 3.
When the storage of the compression coded data of A exceeds a predetermined capacity, the switch means 4 is switched to output the compression coded data to the multiplexing means 5, and the optical disc (1
It is recorded on a 2 cm disc) in a CD-ROM format so that the reproduction speed becomes 4 times.

The compression-encoded data recorded in this way is reproduced, the selection information output is obtained from the multiplex signal output, and the code discriminating means 6 switches the switch means 7. That is,
The switch means 7 distributes the multiplexed signal to the right image signal R, the left image signal L, and the audio signal A by the code discrimination means 6, and the distributed compressed encoded data is the decoding buffer 8.
The image is temporarily stored in the R or the decoding buffer 8L or the decoding buffer 8A, and is decoded by the image decoding means 9R when the decoding buffer 8R reaches a predetermined storage capacity, and when the decoding buffer 8L reaches the predetermined storage capacity. Decoding is performed by the decoding means 9L, and when the decoding buffer 8A reaches a predetermined storage capacity, it is decoded by the audio decoding means 9A and output as a right video signal and a left video signal, respectively. At the same time, left and right audio signals are output.

In this embodiment, the image data photographed from the left and right positions, that is, the left and right eyes, is used. Accordingly, it is possible to easily expand by arbitrarily increasing the image coding means and the code buffer, and the code buffer and the image decoding means.

FIG. 5 is a block configuration diagram showing the overall schematic configuration of a stereoscopic information recording apparatus for a stereoscopic information recording medium which is a second embodiment of the present invention. The image coding means 1 in the first embodiment.
This corresponds to the circuit that details R and 1L. In addition, FIG.
5 is an output characteristic diagram of the variable bit rate recorded by the stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the second embodiment of FIG.
FIG. 9 is an explanatory diagram illustrating a change in the storage capacity of the buffer of the stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the second embodiment. In the figure, the same reference numerals and symbols as those of the first embodiment indicate the same or corresponding components as those of the first embodiment, and therefore, duplicate description will be omitted. Further, since the image coding means on the right image input R side and the image coding means on the left image input L side of a video camera or the like have basically the same circuit configuration, both will be described here at the same time. And
Since the reproducing apparatus is the same as that of the first embodiment shown in FIG. 4, its explanation is omitted.

In FIG. 5, 11R and 11L are image rearranging means for rearranging both image data in a time division manner, and 12R and 11R.
Reference numeral 12L is scan conversion macroblocking means for scanning-converting both image data into macroblocks, 13R and 13L are mode determination means for determining the compression coding form, and 14R, 1
4L is a motion detecting means for detecting the motion amount of both the front and rear image data. 15R and 15L are motion compensation means,
16R and 16L are DCT means for performing discrete cosine transform, 17
R and 17L are weighted quantization means, and 18R and 18L are variable length coding means. And, 19R and 19L are rate control means for controlling to keep the coding length constant. Further, in order to predict the difference between the previous image data and the next image data and perform compression encoding, a procedure opposite to the compression encoding procedure is provided, and the inverse quantization means 20R,
20L and inverse DCT means 21R, 21L.
Reference numerals 22R and 22L denote difference means for obtaining a difference between the image-unit compressed data and motion-compensated image data, and 23R and 23L add the motion-compensated image data and the difference data of the decoded image-unit compressed image data. It is an addition means.
24R and 24L are image memory means.

Next, the recording operation of the stereoscopic information recording medium of this embodiment will be described.

In the image rearranging means 11R and 11L, the right image input R or the left image input L is rearranged in time series to obtain time division data. The time-division data is subjected to scan conversion such as reducing the number of scan lines by the scan conversion macroblock forming means 12R and 12L to obtain macroblock data. Then, the data is input to the mode determination means 13R, 13L and the compression coding form is determined.

In the case of performing intra-image compression coding, DCT means 16R, 16L, weighted quantization means 1
Intra-image compression coding is performed via the paths of 7R, 17L and the variable length coding means 18R, 18L. The rate control means 19R and 19L control the amount of code generated after encoding to be a predetermined value for each encoding unit (one image, small area in the image, etc.), and weight the result. It is transmitted to the quantizing means 17R and 17L. The data output from the weighting quantizing means 17R, 17L is also sent to the dequantizing means 20R, 20L. Inverse DCT means 2
Decoded to both original image data by 0R, 20L,
It is stored in the image memory means 24R, 24L.

On the other hand, when performing inter-image compression coding, first, the macroblock data is input to the motion compensating means 15R, 15L by the mode determining means 13R, 13L, and both images in the image memory means 24R, 24L. Data and macroblock data are transferred to the motion detecting means 14R, 1
4L is compared, a motion vector is obtained, and the motion vectors are similarly input to the motion compensation means 15R and 15L. Next, the motion compensating means 15R, 15L perform motion compensation on the macroblock data using the motion vector to obtain a difference value between the two image data, and the difference values are stored in the image memory means 24R, 24L. Then, the difference values are subtracted from the macroblock data in the difference means 22R and 22L to obtain the difference data between the image units. The image-unit difference data is subjected to image-unit compression coding by the DCT means 16R, 16L, the weighting quantizing means 17R, 17L and the variable length coding means 18R, 18L in the same manner as the image data. Similarly,
The data output from the weighting quantization means 17R, 17L is also sent to the inverse quantization means 20R, 20L. Reverse DC
The original image data is decoded by the T means 21R and 21L and stored in the image memory means 24R and 24L.

As shown in FIG. 6, the rate distribution control means 30 controls the rate control means 19R and the rate control means 19L so that the code amount generated after the coding becomes a predetermined bit rate value for each coding unit. The rate control means 19
The bit rate BR of R and the bit rate BL of the rate control means 19L are controlled, and the sum (BR + BL) is a total of 4.224 Mbps of the reproduction transfer rate of the video data.

The determination of the bit rate BR of the rate control means 19R and the bit rate BL of the rate control means 19L performed by the rate distribution control means 30 at this time is ergonomic so that the image resolution can be better recognized. Has decided the fluctuation.

Further, in the reproducing apparatus, the compression coded data is accumulated in the decoding buffer 8R, the decoding buffer 8L and the decoding buffer 8A, and the accumulated data amount is as shown in FIG.

That is, the amount M of data accumulated in the decoding buffer 8R
Regarding the relationship between R, the accumulated data amount ML of the decoding buffer 8L, and the accumulated data amount MA of the decoding buffer 8A, first, the accumulated data amount MR of each decoding buffer 8R has a predetermined threshold value TMR, and the accumulated data amount ML of the decoding buffer 8L has a predetermined value. The decoding is started when the threshold value TML and the accumulated data amount MA in the decoding buffer 8A exceed a predetermined threshold value TMA. Then, when the left image input L is obtained as the multiplexed signal, the accumulated data amount ML increases, and even if the padding data P that follows is dummy data, the accumulated data amount MR, the accumulated data amount ML,
None of the accumulated data amount MA increases. Right image input R
, The accumulated data amount MR increases, and when the left image input L is obtained, the accumulated data amount ML increases, and by sequentially decoding, the accumulated data amount MR, the accumulated data amount ML, and the accumulated data amount MA are predetermined. It decreases with the damping ratio of.

FIG. 8 is a block diagram showing an overall schematic configuration of a stereoscopic information recording apparatus for a stereoscopic information recording medium which is a third embodiment of the present invention. The image encoding means 1 in the first embodiment is shown in FIG.
This corresponds to the circuit that details R and 1L. FIG. 9 is a block diagram showing a schematic configuration of a main part of a stereoscopic information recording apparatus for a stereoscopic information recording medium which is a third embodiment of the present invention. Also, FIG.
0 is an output characteristic diagram of the variable bit rate recorded by the reproducing apparatus for the stereoscopic information recording medium of the third embodiment of FIG. 8, and FIG. 11 is a stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the third embodiment of FIG. It is explanatory drawing explaining the change of the memory capacity of a buffer.
In the drawings, the same reference numerals and symbols as those of the first and second embodiments indicate the same or corresponding constituents as those of the first and second embodiments, and therefore, are duplicated here. The description is omitted.

In FIG. 8, the rate control means 19R and the rate control means 19L of this embodiment have a rate control means so that the code amount weighted at the time of encoding becomes a unique bit rate value for each encoding unit. The bit rate BR of 19R and the bit rate BL of the rate control means 19L are independently controlled. That is, the bit rate BR of the rate control means 19R and the bit rate BL of the rate control means 19L at this time determine the fluctuations so that the resolution of the image can be better recognized ergonomically. As a result, it has been confirmed that the human eye has a dominant eye, and if the resolution of the left and right images is changed, it looks as if the resolution has increased. The impression is strengthened by changing.

As shown in FIG. 10, the limit determination means 40 is the sum of the code amounts weighted and encoded, that is, the bit rate BR of the rate control means 19R and the rate control means 1.
The sum (BR + BL) of 9L bit rate BL is 1.2
The maximum playback transfer rate of 4.8 Mbps, which is four times Mbps, is not exceeded.

In FIG. 9, image coding means for inputting right image data of a video camera, image coding means for inputting left image data of a video camera, audio for inputting right audio data and left audio data of a microphone. The encoding means uses the MPEG compression encoding method as the output as in the case of the image. A code buffer 5 that temporarily stores each of the right image data and outputs the right image data when a predetermined storage amount is reached.
Similarly, at 0R, the code buffer 50L temporarily stores the right image data and outputs it when a predetermined storage amount is reached. It has a code buffer 50A for temporarily storing the compression-coded data output by voice coding and outputting it when a predetermined storage amount is reached.

The code buffer read control means 51 controls the switching means 52 so as to read the image data or the audio data from the code buffer 50R, the code buffer 50L, and the code buffer 50A when the predetermined accumulated data amount is reached. It is a thing. This operation is shown in FIG.

Next, the operation of the stereoscopic information recording apparatus for the stereoscopic information recording medium according to this embodiment will be described with reference to FIG.

First, the code buffer 50R and the code buffer 50L temporarily store data obtained by coding right image data or left image data of a video camera or the like. Also,
The code buffer 50A encodes the right audio data and the left audio data of the microphone and temporarily stores them.
When the accumulated data amount MR of the code buffer 50R, the accumulated data amount ML of the code buffer 50L, and the accumulated data amount MA of the code buffer 50A are small, the code buffer 50
R or code buffer 50L or code buffer 50A
The accumulated data of is not output. However, the code buffer 5
0R or code buffer 50L or code buffer 50
The accumulated data amount MR, ML, MA of A is a predetermined threshold value (re
ady), the corresponding buffer that has reached the end transmits the arrival to the code buffer read control means 51,
In response to this, the code buffer read control unit 51 reads out image data or audio data from the code buffer 50R, the code buffer 50L, and the code buffer 50A when the predetermined accumulated data amounts MR, ML, and MA have been reached. The switching means 52 is switched.

In the case of FIG. 11, the accumulated data amount MR of the code buffer 50R first exceeds the threshold value, the right image data of the code buffer 50R is output, and then the accumulated data amount ML of the code buffer 50L is increased. When the threshold value is exceeded, the left image data of the code buffer 50L is output, and subsequently, the accumulated data amount ML of the code buffer 50L exceeds the threshold and the left image data of the code buffer 50L is output.

As described above, each of the first to third embodiments is a 12 cm optical disk having a track pitch of 0.7 to 0.85 μm and a shortest pit length of 0.40 to 0.49 μm, and its signal The format is a CD-ROM format, which is recorded so as to be played back at a speed of 4 times, and is normally 4.8 Mbps which is four times 1.2 Mbps.
Is set to the maximum playback transfer rate of data,
This is an embodiment corresponding to claim 1 in which stereoscopic image information is recorded on a high density recording disk.

Therefore, since the amount of compression-encoded data on one disk is increased, even if the data is recorded by the MPEG system standardized by ISO, the ratio of the intra-image-unit compressed data / inter-image-unit compressed data Can be recorded even if is very large. In particular, the present inventors have found that the track pitch is 0.82 μm and the shortest pit length is 0.44 μm, which is 12 cm.
Good results were obtained as an optical disc. However, when the present invention is carried out, the speed is not limited to 4 × speed,
It may be multiple times. Also, the signal format is CD-
Any format other than the ROM format can be used.

In each of the first to third embodiments, the high-density recording disk has 2-channel video data consisting of right image data and left image data compressed by the MPEG method and data compression by the MPEG method. The left and right audio data of two channels are recorded, which is an embodiment corresponding to claim 2.

Therefore, M standardized by ISO
Even if the PEG method is used for recording, even if the ratio of the compressed data in the image unit / the compressed data between the image units becomes very large, it becomes possible to record, and the amount of compression coded data of one disk is increased,
Since the information necessary for obtaining the presence is recorded as the stereoscopic image information and the stereoscopic audio information, the presence can be expressed both visually and acoustically.

Further, in the first embodiment, the video data of 2 channels are each made a data of a fixed transfer rate as shown in FIG. 2, and this can be an embodiment of claim 3. it can. In the first embodiment, the reproduction transfer rate of video data is 2 Mbps on one side, and the reproduction transfer rate of audio data is 0.112 Mbps on one side, which is a total of 4.224 Mbps.

In particular, in this embodiment, the 2-channel video data consisting of the right image data and the left image data and the 2-channel audio data consisting of the right audio data and the left audio data are respectively the data of the fixed reproduction transfer rate. Since it is only necessary to combine a plurality of circuits of independent channels, the structure of the recording device can be simplified, and the stereoscopic information recording device becomes less expensive.

In the second embodiment, the video data of 2 channels are data of variable reproduction transfer rate,
The sum is the fixed reproduction transfer rate, which can be an embodiment corresponding to claim 4.

Therefore, the human eye has a dominant eye,
It has been confirmed that by changing the resolution of the left and right images, it is recognized as if the resolution has increased,
In particular, if the balance between the left and right playback transfer rates is changed, and the sum is set as a fixed playback transfer rate of 4.224 Mbps, and the playback transfer rate is set too high, the playback transfer rate will momentarily exceed 4.8 Mbps. Because it is expected, it gives fluctuations that can be afforded.

In the third embodiment, the 2-channel video data consisting of the right image data and the left image data is data of variable reproduction transfer rate, and the sum thereof is set to the maximum reproduction transfer rate or less. And this can be an embodiment corresponding to claim 5.

Similar to the second embodiment, by changing the resolutions of the left and right images, it is possible to recognize that the resolution has increased. In particular, the balance between the left and right playback transfer rates is changed independently, and the sum of them is set as a fixed playback transfer rate of 4.224 Mbps, and it is expected that the playback transfer rate will momentarily exceed 4.8 Mbps. , Gives a fluctuation that can be afforded.

The first embodiment has been described with reference to an embodiment in which the video data of 2 channels is recorded at a reproduction transfer rate lower than the maximum reproduction transfer rate in the steady state. However, this is also applicable to the second and third embodiments, and is a preferable mode for carrying out the present invention. This can be an embodiment corresponding to claim 6.

Therefore, the fixed reproduction transfer rate may exceed 4.224 Mbps for the sake of compression, and if the reproduction transfer rate is set too high, it is expected that the reproduction transfer rate will momentarily exceed 4.8 Mbps. Will not be output. Therefore, in order to secure a margin, dummy data called padding data is recorded in the empty area in the steady state.

In the first embodiment, the 2-channel video data consisting of the right image data and the left image data is densely recorded at the maximum reproduction transfer rate or less in the initial state and at the reproduction transfer rate higher than the steady state reproduction transfer rate. The example which does is explained. However, this is also applicable to the second and third embodiments, and is a preferable mode for carrying out the present invention. This can be an embodiment corresponding to claim 7.

Therefore, in the initial state, it is necessary to output the data as fast as possible, but normally, the decoding is not started unless a predetermined amount of data is stored in the buffer memory, so in the program start portion, that is, in the initial state. ,
Data is recorded without recording padding data. Therefore, in the initial state, the stereoscopic image information is densely recorded at a reproduction transfer rate lower than the maximum reproduction transfer rate and higher than the reproduction transfer rate in the steady state, and the rising speed accumulated in the buffer memory at the time of reproduction is made high, The response of the video data output during reproduction is improved.

Further, in the stereoscopic information recording apparatus of each of the first to third embodiments, the 2-channel video data is compressed into a high density recording disk at a reproduction transfer rate lower than the maximum reproduction transfer rate in a steady state. The recorded two-channel video data and the data-compressed two-channel audio data are recorded. This can be the embodiment of claim 8.

Therefore, the data-compressed 2-channel video data and the data-compressed 2-channel audio data can be recorded on the high-density recording disk, and the information necessary to obtain a realistic sensation can be recorded as stereoscopic video information, and ,
Even if it is recorded by the MPEG system standardized by ISO, it becomes possible to record even if the ratio of the compressed data in the image unit / the compressed data between the image units becomes very large. Further, it is possible to record the video data of two channels at a reproduction transfer rate lower than the maximum reproduction transfer rate in a steady state, and secure a margin of the reproduction transfer rate.

Although the present embodiment has been described as a three-dimensional information recording device, it can be used as a three-dimensional information recording / reproducing device when the present invention is carried out. That is, it can be implemented as a device having a recording function.

In the stereoscopic information recording apparatus of each of the first to third embodiments, the 2-channel video data is densely reproduced at a reproduction transfer rate lower than the maximum reproduction transfer rate in the initial state and higher than the steady state reproduction transfer rate. The data-compressed 2-channel video data and the data-compressed 2-channel audio data are recorded on the high-density recording disk, which can be the embodiment of claim 8.

Therefore, the data-compressed 2-channel video data and the data-compressed 2-channel audio data can be recorded on the high-density recording disk, and the information necessary to obtain a realistic sensation can be recorded as stereoscopic video information.
Even if it is recorded by the MPEG system standardized by ISO, it becomes possible to record even if the ratio of the compressed data in the image unit / the compressed data between the image units becomes very large. Also, in the initial state, the stereoscopic image information is densely recorded at the maximum reproduction transfer rate or less at a reproduction transfer rate higher than the steady-state reproduction transfer rate, and the rising speed accumulated in the buffer memory at the time of reproduction is set high, The response of the video data output during reproduction is improved.

Although the present embodiment has been described as a stereoscopic information recording apparatus, it can be used as a stereoscopic information recording / reproducing apparatus when implementing the present invention. That is, it can be implemented as a device having a recording function.

By the way, although the MPEG standard has been described in the above embodiment, the standard is not specified when the present invention is carried out.

Further, in the above embodiment, the signal format is the 12-cm optical disc and the CD-ROM format, but the size of the disc is not limited.
It can also be used for discs of other standards.

[0086]

As described above, in the three-dimensional information recording medium according to the first aspect, by recording the three-dimensional image information on the high density recording disk, the amount of compression coded data of one disk is increased. Therefore, even if the data is recorded with the MPEG method standardized by ISO, the compressed data within the image unit /
It becomes possible to record even if the ratio of compressed data between image units becomes very large.

In the stereoscopic information recording medium of claim 2,
The high-density recording disk records data-compressed 2-channel video data and data-compressed 2-channel audio data, and records the information necessary for obtaining a sense of presence as stereoscopic video information. Even if it is recorded by the standardized MPEG method, it becomes possible to record even if the ratio of the compressed data in the image unit / the compressed data between the image units becomes very large.

In the stereoscopic information recording medium of claim 3,
In addition to the effect of claim 2, by making the 2-channel video data and 2-channel audio data respectively data of a fixed reproduction transfer rate, the configuration of the recording device can be simplified, and the recording device becomes less expensive. .

In the stereoscopic information recording medium according to claim 4,
In addition to the effect of claim 2, since the video data of 2 channels are each made the data of the variable reproduction transfer rate, and the sum thereof is the fixed reproduction transfer rate, the bit rates of the video data of 2 channels are mutually changed. It gives fluctuations that are suitable for ergonomics and can improve the apparent image accuracy even at the same playback transfer rate.
Since the sum of the reproduction transfer rates of the 2-channel video data is constant, the transmission characteristics can be made uniform.

In the stereoscopic information recording medium of claim 5,
In addition to the effect of claim 2, the video data of 2 channels is data of a variable reproduction transfer rate, and
The sum is set below the maximum playback transfer rate, and the bit rates of the two-channel video data are varied to give fluctuations that are ergonomically compatible, and the apparent image accuracy is improved even with the same playback transfer rate. . Moreover, the bit rates of the video data of both channels can be simultaneously raised or lowered as needed, and a strong visual stimulus can be given to human vision.

In the stereoscopic information recording medium of claim 6,
In addition to the effect of any one of claims 3 to 5, 2
The video data of the channel is recorded at a reproduction transfer rate lower than the maximum reproduction transfer rate in the steady state to secure a margin of the reproduction transfer rate.

In the stereoscopic information recording medium of claim 7,
In addition to the effect according to any one of claims 3 to 6, stereoscopic image information is densely recorded at a reproduction transfer rate lower than a maximum reproduction transfer rate in an initial state and higher than a reproduction transfer rate in a steady state, and reproduced. At this time, the rising speed accumulated in the buffer memory is made high, and the responsiveness of the video data output at the time of reproduction is improved.

The stereoscopic information recording apparatus according to claim 8 is 2
Since the video data of the channel records the compressed data of 2 channels and the compressed data of 2 channels of audio data on the high density recording disk at a reproduction transfer rate lower than the maximum reproduction transfer rate in the steady state. It is possible to record data-compressed 2-channel video data and data-compressed 2-channel audio data on a high-density recording disk, record the information necessary to obtain a sense of presence as stereoscopic video information, and comply with the ISO standard. Even if it is recorded by the standardized MPEG system, it can be recorded even if the ratio of the compressed data in the image unit / the compressed data between the image units becomes very large. Further, it is possible to record the video data of two channels at a reproduction transfer rate lower than the maximum reproduction transfer rate in a steady state, and secure a margin of the reproduction transfer rate.

The stereoscopic information recording apparatus according to claim 9 is 2
In the initial state, the channel video data is the maximum playback transfer rate or less, and the playback transfer rate higher than the steady state playback transfer rate is densely compressed into a high-density recording disk.
Since the channel audio data is recorded, it is possible to record data-compressed 2-channel video data and data-compressed 2-channel audio data on a high-density recording disk, and to record the information necessary to obtain a realistic sensation. Since it can be recorded as video information, M standardized by ISO
Even if the data is recorded by the PEG method, the data can be recorded even if the ratio of the compressed data in the image unit / the compressed data between the image units becomes very large. Also, in the initial state, the stereoscopic image information is densely recorded at the maximum reproduction transfer rate or less at a reproduction transfer rate higher than the steady-state reproduction transfer rate, and the rising speed accumulated in the buffer memory at the time of reproduction is made high, The response of the video data output during reproduction is improved.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing an overall schematic configuration of a stereoscopic information recording apparatus for a stereoscopic information recording medium which is a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a data string of a multiplex signal output outputted by the stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the first embodiment of FIG.

3 is an output characteristic diagram of a fixed bit rate recorded by the stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the first embodiment of FIG. 1;

FIG. 4 is a block configuration diagram showing an overall schematic configuration of a stereoscopic information reproducing apparatus for a stereoscopic information recording medium which is a first embodiment of the present invention.

FIG. 5 is a block configuration diagram showing an overall schematic configuration of a stereoscopic information recording apparatus for a stereoscopic information recording medium which is a second embodiment of the present invention.

6 is an output characteristic diagram of a variable bit rate recorded by the stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the second embodiment of FIG. 5;

FIG. 7 is an explanatory diagram for explaining changes in the storage capacity of the buffer of the stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the second embodiment of FIG.

FIG. 8 is a block configuration diagram showing an overall schematic configuration of a stereoscopic information recording apparatus for a stereoscopic information recording medium which is a third embodiment of the present invention.

FIG. 9 is a block diagram showing a schematic configuration of a main part of a stereoscopic information recording apparatus for a stereoscopic information recording medium which is a third embodiment of the present invention.

10 is an output characteristic diagram of a variable bit rate recorded by the stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the third embodiment of FIG.

FIG. 11 is an explanatory diagram for explaining changes in the storage capacity of the buffer of the stereoscopic information reproducing apparatus for the stereoscopic information recording medium of the third embodiment of FIG. 8.

[Explanation of symbols]

 1R image coding means 1L image coding means 1A audio coding means 2R code buffer 2L code buffer 2A code buffer 3 code selecting means 4 switch means 5 multiplexing means 6 code discriminating means 7 switch means 8R decoding buffer 8L decoding buffer 8A decoding Buffer 9R Image decoding means 9L Image decoding means 9A Audio decoding means

Claims (9)

[Claims] 1. A stereoscopic information recording medium characterized in that stereoscopic image information is recorded on a high density recording disk. 2. A stereoscopic information recording medium comprising a high-density recording disc on which data-compressed 2-channel video data and data-compressed 2-channel audio data are recorded. 3. The stereoscopic information recording medium according to claim 2, wherein the video data of the two channels is data of a fixed transfer rate. 4. The stereoscopic information recording medium according to claim 2, wherein the video data of the two channels is data of a variable reproduction transfer rate, and the sum thereof is a fixed reproduction transfer rate. 5. The stereoscopic information recording according to claim 2, wherein the video data of the two channels is data of a variable reproduction transfer rate, and the sum thereof is set to a maximum reproduction transfer rate or less. Medium. 6. The video data of the two channels is recorded at a reproduction transfer rate lower than the maximum reproduction transfer rate in a steady state, according to any one of claims 3 to 5. Three-dimensional information recording medium. 7. The video data of the two channels are densely recorded at a reproduction transfer rate which is equal to or lower than a maximum reproduction transfer rate in an initial state and higher than a reproduction transfer rate in a steady state. Item 7. The stereoscopic information recording medium according to any one of items 6. 8. A stereoscopic information recording apparatus for recording data-compressed 2-channel video data and data-compressed 2-channel audio data on a high-density recording disk, wherein the 2-channel video data is in a steady state. A stereoscopic information recording device, which records at a reproduction transfer rate lower than the maximum reproduction transfer rate. 9. A stereoscopic information recording apparatus for recording data-compressed 2-channel video data and data-compressed 2-channel audio data on a high density recording disk, wherein the 2-channel video data is in an initial state. A three-dimensional information recording device, which performs dense recording at a reproduction transfer rate that is lower than the maximum reproduction transfer rate and higher than a steady-state reproduction transfer rate.