JPH09224210A - Disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain high speed information retrieval and large capacity edit or the like by providing plural pickups to the disk recording and reproducing to utilize sufficiently a large capacity disk. SOLUTION: Pickups 1, 2 read a data signal from a disk 20 and a front end processor 3 applies parallel decoding, error correction, demultiplexing, distribution processing to the data signal to provide the output of video data, sound data and text data and data processors 4A, 4B decode the data into video, sound and character information respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording / reproducing apparatus having a plurality of pickups for recording or reproducing digital data on a disc for recording digital data such as a magnetic disc or an optical disc.

[0002]

2. Description of the Related Art Many conventional disc recording / reproducing apparatuses are provided with one pickup for recording or reproducing digital data (hereinafter referred to as data) on a disc for recording digital data, and a plurality of video / audio signals are simultaneously recorded. It is common to use a buffer memory for recording or reproducing.

FIG. 15 shows a configuration example of a conventional disc recording / reproducing apparatus. In this configuration example, one pickup 501
At, a plurality of video / audio channels are multiplexed and recorded or reproduced on one recording track. Therefore, the signal reading speed of the pickup 501 is a multiple of the number of channels used in one video / audio channel.
At this time, the relationship between the read speed and the display speed is expressed by the following formula. A ≧ N · B where A: maximum read speed (unit: bps), B:
Maximum display speed (unit: bps), N: number of channels. That is, if a plurality of channels are output at the same time, the data read speed increases according to the number of channels.

Next, the data format will be described. The data format is a rule that defines the division between a channel identification signal and a video signal / audio signal that are inserted in advance in the data to identify the channel in the reproduced data. In other words, by dividing according to a certain rule, another channel can be identified and separated at the time of data reproduction, and can be restored. Therefore, the multiplexed data is divided into packets and managed by the ID number. FIG. 16 shows the data structure in this packet. The header indicates the start point of a packet, which is a unit of data division, and the ID specifies the type of data (channel / video / audio etc.) sent by this packet and identifies the method of processing the data that follows. It is a signal.

The data controller 502 performs the discriminative rearrangement, that is, the restoration of the data from the data string reproduced from the pickup 501 as defined above. First, the data controller 502 detects the header of the signal input from the pickup 501 and recognizes the start point of the packet. Then, attribute information indicating which channel the data contained in the packet belongs to is detected by the ID. According to this attribute information, the signal data in the packet is divided and stored in the memory 503 for each attribute. By this, as shown in FIG. 17, it becomes possible to divide the data sequence arranged in time series into a plurality of data sequences. The data controller 502 simultaneously outputs the address information of the memory 503 to the system controller 507, and processes the data for each channel so that the data decoder 504 can accurately capture the data.

The data decoder 504 restores the signal data rearranged for each channel into the original video / audio signal. At that time, for the compressed signal data,
Decompress. Here, in order to simplify the description, non-compressed data will be described. Data decoder 504
Receives address information of the memory 503 from the system controller 507 and continuously reads the signal data rearranged in the above process. At this time, the data decoder 504 includes decoders for the number of signal channels,
Decode multiple channels at the same time.

In the conventional disc recording / reproducing apparatus, when reproducing a plurality of channels at the same time as described above, the data controller 502 is required to have a data processing speed which is a multiple of the number of channels when reproducing one channel. There was a limit to the number of channels or playback quality that could be played simultaneously.

There is also an apparatus provided with a plurality of pickups, for example, there is a technique disclosed in Japanese Patent Application Laid-Open No. 6-76351. FIG. 18 is a configuration example of a video / audio recording / reproducing unit of the optical disc device disclosed in this publication. FIG.
In this configuration example, the area L of the disk 807 is assigned as the video portion and the area M is assigned as the audio portion or the text portion.

The video signal is recorded on the disk 807 from the video recording unit 803 via the optical head 801. The audio signal is recorded on the disk 807 by the audio recording unit 804 via the optical head 802. Optical head 80 during playback
1, the image is reproduced via the image reproducing unit 805,
The audio is reproduced by the audio reproduction unit 806 from No. 2. The main application is to output audio during still image video, and is not expected to be applied to stereoscopic video.

Next, the technique disclosed in Japanese Patent Laid-Open No. 7-37368 is intended for a data search device using two pickups in order to enable high speed processing. However, the disk has data areas on both sides, and pickups are provided on the front surface side and the back surface side of the disk, respectively.

[0011]

However, although the above-mentioned conventional optical disk device has two pickups,
We will use each for video and audio,
It simply splits the signal for processing. That is, application to large-capacity information retrieval, high-speed access, recording or reproduction of high-quality stereoscopic video, large-capacity editing, etc. was not expected. Therefore, a technique for fully utilizing the large capacity disk has not been disclosed.

The present invention has been made to solve the above-mentioned conventional problems, and is provided with a plurality of pickups, large-capacity information retrieval, high-speed access, recording or reproduction of high-quality stereoscopic video, large-capacity editing, etc. It is an object of the present invention to provide a disc recording / reproducing apparatus that enables the above.

[0013]

In order to solve the above-mentioned problems, a disk recording / reproducing apparatus according to claim 1 of the present invention comprises a plurality of pickups used for recording or reproducing on / from a disk for recording digital data. In the disc recording / reproducing apparatus provided, each of the pickups records or reproduces digital data on a different spiral recording track corresponding to each pickup.

A disc recording / reproducing apparatus according to a second aspect of the present invention is a disc recording / reproducing apparatus having a plurality of pickups used for recording or reproducing on a disc for recording digital data. An information data area to be recorded and an index area for recording information relating to recording or reproduction of this information data, wherein the information data area and the index area are recorded or reproduced by another pickup. To do.

According to a third aspect of the present invention, there is provided a disk recording / reproducing apparatus according to the first or second aspect of the present invention, which is the first component of the disk for recording digital data. The spiral recording track is an information data area, and the second spiral recording track is an index area corresponding to the information data area.

According to a fourth aspect of the present invention, there is provided a disk recording / reproducing apparatus for recording / reproducing empty area information of an information data area in an index area in the means constituting the disk recording / reproducing apparatus according to the second aspect. Is characterized by.

A disc recording / reproducing apparatus according to a fifth aspect of the present invention is a disc recording / reproducing apparatus having a plurality of pickups used for recording or reproducing on a disc for recording digital data, and for a right eye having parallax with each other. A right-eye area for recording right-eye video data of a stereoscopic video composed of an image and a left-eye video, and a left-eye area for recording left-eye video data of the stereoscopic video, and separate pickups for the right-eye area and the left-eye area Is characterized by recording or reproducing video data.

With the above structure, in the disc recording / reproducing apparatus according to the first aspect of the present invention, the plurality of pickups record or reproduce the digital data on different spiral recording tracks corresponding to the respective pickups. When recording or reproducing digital data on different spiral recording tracks, it becomes possible to record or reproduce digital data in parallel while being mutually related.

A disc recording / reproducing apparatus according to a second aspect of the present invention has an information data area and an index area.
Since the digital data is recorded or reproduced by another pickup, the information data and the index corresponding to the information data can be recorded or reproduced in parallel while being correlated with each other.

In the disk recording / reproducing apparatus according to the third aspect of the present invention, the first spiral recording track is an information data area and the second spiral recording track is an index area corresponding to the information data area. Therefore, the information data and the index corresponding to the information data can be recorded or reproduced at high speed while being associated with each other.

Since the disk recording / reproducing apparatus according to the fourth aspect of the present invention records or reproduces the free area information of the information data area in the index area, it uses the free area information of the information data area to store a large amount of data. Editing is possible.

In the disk recording / reproducing apparatus according to the fifth aspect of the present invention, since the image data is recorded or reproduced in the right eye area and the left eye area by different pickups, the stereoscopic image can be recorded or reproduced at high speed. Therefore, it is possible to record or reproduce the video data for the right eye and the video data for the left eye in association with each other.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a DVD (D
FIG. 1 is a block diagram of a disc recording / reproducing apparatus of a first embodiment applied to an igital Video Disc) system. FIG.
Shows the structure of the double spiral track of the disk used in the present embodiment. In the present embodiment, in order to realize recording or reproduction of a plurality of channels while maintaining the same recording / reproduction time as that of the conventional one channel, the distance between two tracks is narrowed to improve the recording density. . Track pitch is 0.74 μm in conventional DVD system
Therefore, in the present embodiment, two channels are simultaneously reproduced for the same time as in the conventional case, so the track pitch is set to 1/2, 0.35 μm. This improvement in recording density can be realized by reducing the diameter of the focal spot of light by shortening the wavelength of the laser used in the pickup and improving the physical structure of the disk (application of magnetic super-resolution, etc.). .

Next, the operation of reproducing data from the disk 20 using the disk recording / reproducing apparatus of this embodiment will be described. First, the outer circumference data is detected by the pickup 1 from the outer track of the double helix, and the inner circumference data is detected by the pickup 2 from the inner track. At this time, the linear velocity on the inner peripheral side becomes slower than the linear velocity on the outer peripheral side. The distance from the disc center of the track where each pickup detects data is the outer peripheral side LI and the inner peripheral side L2.
Then, since L2 becomes a value smaller than L1, the linear velocity on the inner peripheral side becomes slow. For this reason, it is necessary to perform time-axis correction on either the inner or outer circumference signal. The time axis correction circuit 5 and the memory 6 perform this time axis correction. The time-axis correction circuit 5 temporarily stores the data read by the pickup 2 in the memory 6 and reads the stored data in synchronization with the data read by the pickup 1, so that the data speeds on the inner and outer circumference sides are the same. To
As a result, the data on the inner circumference side and the data on the outer circumference side can be processed in the same process.

Data signals read from the pickup 1 and the pickup 2 are added with signals for error correction, and subjected to EMF modulation processing for facilitating signal detection. EMF modulation modulates the original data so that the average occurrence probability of H and L signals is about 50%. This is a modulation process that minimizes the DC component of the signal detected from the bit string of data during data reproduction. The data signal read from each pickup includes control data and video
It includes voice data and various character data related thereto.

The data signals read from the pickup 1 and the pickup 2 as described above are input to the parallel processing type front end processor 3. The front-end processor 3 restores, error-corrects, separates, and distributes the data signals read from the pickup 1 and the pickup 2 in parallel by independent data processing circuits 3A and 3B.

Here, the operation of the data processing circuit 3A corresponding to the pickup 1 will be described, but the same applies to the data processing circuit 3B. The data signal input from the pickup 1 to the front-end processor 3 is
After waveform shaping by the data processing circuit 3A, PLL /
It is input to the demodulation circuit 3a. The PLL / demodulation circuit 3a is
The jitter component due to the rotation deviation of the disk 20 is canceled to form a pulse train having an accurate pulse width, and then the pulse train is demodulated. The demodulated data is sent to the error correction circuit 3
The error correction processing is performed at b, and the error correction signal is restored to the added data.

In the present embodiment, the CIR is used as the error correction format in the same manner as the conventional CD (compact disc).
C (Cross Interleaved Reed Solomon Code) is used. In this CIRC processing, the original data is divided into blocks of a certain size, a Reed-Solomon code for error correction is added to each block, and error correction capability for burst block errors due to scratches on the disk is added. In order to reinforce, a serial data string is rearranged in a time axis direction in units of a plurality of blocks (interleave), and a Reed-Solomon code is further added to a group of a plurality of blocks.

The error correction circuit 3b uses the memory 3c as a work area to perform restoration processing of error correction by CIRC processing, that is, deinterleave processing, and restores various original data.

The data controller 3d rearranges the restored serial data string into video data, audio data and text data, using the memory 3e as a work area,
Transfer to the data processor 4A.

The data processor 4A restores the transferred video data, audio data, and text data into video, audio, and character information by the video processor 4a, audio processor 4b, and text data processor 4c, respectively. When the signal data has been subjected to the compression process defined by MPEG or the like, the decompression process is performed based on the defined compression rule.

By performing the above-described reproduction processing on the pulse trains reproduced from the outer and inner tracks, respectively, high-quality 2-channel video / audio can be simultaneously reproduced.

The system controller 12 controls the operation of the entire system according to the information of the reproduced data signal. In addition, when a continuous loss of data occurs, re-detection processing of the lost portion and correction of output data are performed.

Upon receiving an instruction from the system controller 12, the mechanism controller 11 controls the mechanism, the pickup, and the spindle motor for rotating the disk.

Next, signal processing when recording data on the disk 20 of the present embodiment will be described. During recording, signal processing opposite to that during reproduction is executed. First, analog video and audio signals are D / A converted and compressed,
Converts video / audio data to serial data. Then, a Reed-Solomon code for performing error correction processing is added and interleave processing is performed, and a data signal of two channels is recorded on the disk 20 in a double spiral track.

With the configuration and operation described above, the video / audio data is recorded and reproduced on the double spiral track, so that the video and audio of two channels can be reproduced in parallel with each other.

FIG. 3 is a block diagram of a disk recording / reproducing apparatus according to the second embodiment of the present invention. A disc 31 capable of recording / reproducing data, a disc motor 32 for rotating the disc 31, and a pickup 33 and a pickup 34 for recording / reproducing data on / from the disc 31 are provided. The pickup 33 has a recording / reproducing circuit 35 and a pickup 34. A recording / reproducing circuit 36 is connected to each. Further, a control circuit 37 for controlling the pickup 33 and the pickup 34 is provided.

FIG. 4 shows a disk in which indexes are recorded on the inner and outer circumferences and information data is recorded in the intermediate area by the disk recording / reproducing apparatus of the present embodiment.

In the disc recording / reproducing apparatus of the present embodiment, when the information data having the index recorded on the inner circumference is read, the index signal read by the pickup 34 is input / output data by the recording / reproducing circuit 36. It is converted into Y and input to the control circuit 37. The control circuit 37 controls the pickup 33 to move to the information data area based on the input / output data Y. The pickup 33 moves to the information data area corresponding to the input / output data Y, reads the information data, and converts it into the input / output data X in the recording / reproducing circuit 35.

Next, when reading the information data in which the index is recorded on the outer circumference, the index signal read by the pickup 33 is recorded in the recording / reproducing circuit 35.
Is converted into input / output data X and input to the control circuit 37. The control circuit 37 controls the pickup 34 to move to the information data area based on the input / output data X. The pickup 34 moves to the information data area corresponding to the input / output data X, reads the information data, and converts it into the input / output data Y by the recording / reproducing circuit 36.

Next, when an index is recorded on the inner circumference to write information data, the information data is given as the input data X and the index is given as the input data Y. The input data X is recorded by the recording / reproducing circuit 35 as the recording signal x.
And is written in the information data area of the disc 31 by the pickup 33. The input data Y is converted into a recording signal y by the recording / reproducing circuit 36 and written in the inner index area of the disc 31 by the pickup 34.

When an index is recorded on the outer circumference and information data is written, the information data is given as the input data Y, and the index is given as the input data X. The input data Y is recorded by the recording / reproducing circuit 36 as the recording signal y.
And is written in the information data area of the disc 31 by the pickup 34. The input data X is converted into a recording signal x by the recording / reproducing circuit 35 and written in the outer peripheral index area of the disc 31 by the pickup 33.

Further, when the information data is additionally written in the empty area of the information data area of the disc 31, the index signal is read by the pickup 34, converted into the input / output data Y by the recording / reproducing circuit 36, and the control circuit 3 is used.
7 detects free area information from this input / output data Y. Then, the control circuit 37 controls the pickup 33 to move to the empty area based on the empty area information. Then, the recording / reproducing circuit 35 converts the information data into a recording signal x, and the pickup 33 writes the information in the information data area of the disc 31, and at the same time, the recording / reproducing circuit 36 records an index corresponding to the information data to be written in the recording signal y. Convert it into a disk 31 by the pickup 34
Write to the index area of. By the above writing method, writing and reading of information data can be performed at high speed. In addition, when recording an index of large-capacity and continuous information such as video information as large-capacity information (for example, image information such as an icon), the index can be recorded easily and at high speed. .

Next, FIG. 5 is an explanatory diagram of a disk recording / reproducing apparatus according to a third embodiment of the present invention. FIG. 6 shows a disc in which the left-eye image data is recorded in the area A and the right-eye image data is recorded in the area B in order to record a stereoscopic image in the disc recording / reproducing apparatus. In FIG. 5, the image formed by the right-eye lens 51 is converted into a right electric signal by the CCD 53, and the image formed by the left-eye lens 52 is converted into a left electric signal by the CCD 54. To be done. The electric signals are converted into left and right video signals by the signal processing circuit 55, and further converted into left and right video data by the recording circuit 56. Then, the right video data is recorded by the pickup 58, and the left video data is recorded by the pickup 57 from the inner circumference of the area B and the area A of the disk 59, respectively.

At the time of reproduction, the pickup 58 and the pickup 57 sequentially read the video data from the inner circumference of the area A and the area B, and the reproduction switching circuit 60 converts the video data into a video signal to convert the video data to the video signal shown in FIG. 7) or the left video signal of FIG. 7B, either one of them is selected and reproduced as it is. Also, when playing back stereoscopic images,
After the video data from the pickup 58 and the pickup 57 is converted into left and right video signals by the reproduction switching circuit 60, each video signal is sequentially switched for each field,
The left and right video signals shown in FIG. 7C are output as a combined stereoscopic video signal, and the stereoscopic video is displayed on a stereoscopic video display device (not shown).

With the configuration and operation described above, a stereoscopic image can be recorded and reproduced at high speed, and the image data for the right eye and the image data for the left eye can be associated with each other or can be reproduced independently.

In another embodiment, left-eye image data and right-eye image data of a stereoscopic image are recorded on a disc in a double spiral track corresponding to each data.

FIG. 8 is a block diagram of a disk recording / reproducing apparatus according to the fourth embodiment of the present invention. The disk recording / reproducing apparatus of the present embodiment is different from the disk recording / reproducing apparatus of the second embodiment of FIG. 3 in that a data line 89 connecting the recording / reproducing circuit 85 and the recording / reproducing circuit 86, an edit control circuit 88, and Has been added.

FIG. 9 shows the areas C, D, and
The structure of the disk 81 in which different data is recorded in the area E is shown, and the area F is an empty area. The operation of exchanging the data recorded in the areas C and D of the disk using the disk recording / reproducing apparatus of the present embodiment will be described. First, the pickup 84 reads the index signal recorded in the area C, the area D, or the area E, converts it into an index in the recording / reproducing circuit 86, and transfers it to the editing control circuit 88. Editing control circuit 88
Detects the position and amount of the vacant area from this index and supplies it to the control circuit 87. The control circuit 87 controls the pickup 84 to move to the area D and the pickup 83 to move to the empty area F.

The pickup 84 includes areas D and C.
The data recorded in the recording / reproducing circuit 86 is sequentially read out.
Data correction is performed on the data line 89
Is transferred to the recording / reproducing circuit 85 via. And FIG.
As shown in 0, the pickup 83 writes the data in areas D1 and C1 in the empty area F in correspondence with the data recorded in the areas D and C, respectively. Data reading by the pickup 84, pickup 83
The data writing by is continuously performed from the start data of the area D to the final data of the area C.

When the above operation is completed, the control circuit 87
The pickup 84 is controlled to move to the start position of the area D, and the pickup 83 is moved to the start position of the area C1. When the pickup 84 and the pickup 83 reach their respective target positions, the pickup 83 reads the data in the area C1, the recording / reproducing circuit 85 performs error correction processing, and the like, and the recording / reproducing circuit 86 receives the data in the recording / reproducing circuit 86. It is transferred and written from the start position of the area D by the pickup 84. When the pickup 83 reads the data in the area C1, the recording / reproducing circuit 85 converts the data into information data, and the edit control circuit 8
8 is transferred. The edit control circuit 88 uses the recording / reproducing circuit 8
It is confirmed that the data reading of the area C1 is completed based on the information data transferred from No. 5, and the completion information is sent to the control circuit 87. The control circuit 87 uses the pickup 8
4 to the start position of the area C, and the pickup 83 to the area D1.
Control to move to the start position. Then, the pickup 83 reads out the data in the area D1 and performs processing such as error correction in the recording / reproducing circuit 85, and the data line 8
The data is transferred to the recording / reproducing circuit 86 via 9 and written by the pickup 84 from the start position of the area C.

By the above operation, the area D and the area C in FIG. 9 are exchanged as shown in FIG. The areas C1 and D1 in which the data is written for editing are left as they are, and the data is erased or overwritten later.

Next, FIG. 12 shows another structure of the disk 81 in which different data is recorded in the areas G, H, and J. In order to replace the data recorded in the areas G and H, The operation when the free area K used for editing is small will be described. First, the pickup 84 reads the index signal recorded in either the area G, the area H, or the area J, converts it into an index in the recording / reproducing circuit 86, and transfers it to the editing control circuit 88. Editing control circuit 8
8 detects the position and amount of the empty area from this index, and supplies it to the control circuit 87. The control circuit 87 sets the pickup 84 in the area H and the pickup 83 in the empty area K.
Control to move to.

Pickup 84 and pickup 83
Reaches the target position, the pickup 84 moves to the area H
Data is read out, processing such as error correction is performed in the recording / reproducing circuit 86, and transferred to the recording / reproducing circuit 85 via the data line 89. Then, as shown in FIG. 13, the pickup 83 writes in the area H1 in the empty area K. At that time, since the free area K of the disk 81 is smaller than the data amount of the areas G and H, a part of all the data in the area H is written in the area H1. When the writing is completed, the control circuit 87 controls the pickup 84 to move to the area G and the pickup 83 to move to the area G1 of the empty area K. When each of the pickup 84 and the pickup 83 reaches the target position, part of the data in the area G is read and written in the area G1.

When the above operation is completed, the control circuit 87
The pickup 84 is controlled to move to the start position of the area H, and the pickup 83 is moved to the start position of the area G1. When the pickup 84 and the pickup 83 reach their respective target positions, the pickup 83 reads the data in the area G1, the recording / reproducing circuit 85 performs error correction processing, and the like, and the recording / reproducing circuit 86 transmits the data to the recording / reproducing circuit 86. It is transferred and written from the start position of the area H by the pickup 84. When the pickup 83 reads the data in the area G1, the recording / reproducing circuit 85 converts the data into information data, and the edit control circuit 8
8 is transferred. The edit control circuit 88 uses the recording / reproducing circuit 8
On the basis of the information data transferred from No. 5, it is confirmed that the data reading of the area G1 is completed, and the completion information is sent to the control circuit 87. The control circuit 87 uses the pickup 8
4 is moved to the area G, and the pickup 83 is moved to the start position of the area H1. When the pickup 84 and the pickup 83 reach their respective target positions, the pickup 83 reads out the data in the area H1, and the recording / reproducing circuit 85 performs processing such as error correction and the like, and the recording / reproducing circuit 86 passes through the data line 89. It is transferred and written from the start position of the area G by the pickup 84.

By repeating the above operation, FIG.
As shown in FIG. 12, the area H and the area G in FIG. 12 are replaced with each other.
That is, by dividing the data to be edited and reading and writing the data repeatedly, it is possible to edit a large amount of video information or the like on a single disc even for a disc having a small free area.

[0057]

As described above, in the disk recording / reproducing apparatus according to the first aspect of the present invention, the plurality of pickups record or reproduce the digital data on different spiral recording tracks corresponding to the respective pickups. When recording or reproducing digital data on mutually different spiral recording tracks, it becomes possible to record or reproduce digital data in parallel while being mutually related.

A disk recording / reproducing apparatus according to a second aspect of the present invention has an information data area and an index area.
Since the digital data is recorded or reproduced by another pickup, the information data and the index corresponding to the information data can be recorded or reproduced in parallel while being correlated with each other.

A disk recording / reproducing apparatus according to a third aspect of the present invention has a first spiral recording track as an information data area and a second spiral recording track as an index area corresponding to this information data area. Therefore, the information data and the index corresponding to the information data can be recorded or reproduced at high speed while being associated with each other.

Since the disk recording / reproducing apparatus according to the fourth aspect of the present invention records or reproduces the free area information of the information data area in the index area, the free area information of the information data area is used for the large capacity data. Editing is possible.

In the disc recording / reproducing apparatus according to the fifth aspect of the present invention, since the image data is recorded or reproduced in the right eye area and the left eye area by different pickups, the stereoscopic image can be recorded or reproduced at high speed. Therefore, it is possible to record or reproduce the video data for the right eye and the video data for the left eye in association with each other.

[Brief description of drawings]

FIG. 1 is a block diagram of a disk recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram showing the structure of a double spiral track of the disk used in the first embodiment of the present invention.

FIG. 3 is a block diagram of a disk recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a structure of a disc according to a second embodiment of the present invention.

FIG. 5 is an explanatory diagram of a disk recording / reproducing device according to a third embodiment of the present invention.

FIG. 6 is a diagram showing a structure of a disc according to a third embodiment of the present invention.

7A is a right video signal, FIG. 7B is a left video signal,
(C) is a diagram showing a stereoscopic video signal in which left and right video signals are combined.

FIG. 8 is a block diagram of a disk recording / reproducing apparatus according to a fourth embodiment of the present invention.

FIG. 9 is a diagram showing a structure of a disc according to a fourth embodiment of the present invention.

FIG. 10 is a diagram showing a structure of a disc according to a fourth embodiment of the present invention.

FIG. 11 is a diagram showing a structure of a disc according to a fourth embodiment of the present invention.

FIG. 12 is a diagram showing a structure of a disc according to a fourth embodiment of the present invention.

FIG. 13 is a diagram showing a structure of a disc according to a fourth embodiment of the present invention.

FIG. 14 is a diagram showing a structure of a disc according to a fourth embodiment of the present invention.

FIG. 15 is a block diagram of a conventional disc recording / reproducing apparatus.

FIG. 16 is a diagram showing a data structure in a packet.

FIG. 17 is an explanatory diagram of dividing a data string arranged in time series into a plurality of data strings.

FIG. 18 is a configuration diagram of a video / audio recording / reproducing unit of a conventional optical disc device.

FIG. 19 is a diagram showing a structure of a conventional disc.

[Explanation of symbols]

 1, 2 pickups 3 front-end processor 3A, 3B data processing circuit 3a PLL / demodulation circuit 3b error correction circuit 3c memory 3d data controller 3e memory 4A, 4B data processor 4a video processor 4b voice processor 4c text data processor 5 time axis correction circuit 6 memory 7, 8 focus / tracking control circuit 9 servo controller 10 spindle motor driver 11 mechanism controller 12 system controller 20 disk

Claims (5)

[Claims] 1. A disc recording / reproducing apparatus comprising a plurality of pickups used for recording / reproducing on / from a disc for recording digital data, wherein each pickup has digital data on different spiral recording tracks corresponding to each pickup. A disc recording / reproducing apparatus for recording or reproducing data. 2. A disc recording / reproducing apparatus comprising a plurality of pickups used for recording / reproducing on / from a disc for recording digital data, comprising: an information data area for recording information data on the disc; A disc recording / reproducing apparatus having an index area for recording information regarding reproduction, wherein the information data area and the index area are recorded or reproduced by separate pickups. 3. A first spiral recording track of a disc for recording digital data is used as an information data area, and a second spiral recording track is used as an index area corresponding to this information data area. The disc recording / reproducing apparatus according to claim 1 or 2, characterized in that 4. The disk recording / reproducing apparatus according to claim 2, wherein free area information of the information data area is recorded or reproduced in the index area. 5. A disc recording / reproducing apparatus having a plurality of pickups used for recording / reproducing on / from a disc for recording digital data, wherein a right-eye image of a stereoscopic image composed of a right-eye image and a left-eye image having parallax with each other. A right-eye area for recording data and a left-eye area for recording left-eye video data of the stereoscopic video, wherein the right-eye area and the left-eye area record or reproduce the video data by separate pickups. Disk recording / reproducing device.