JPH11338643A - Reproducing method for disk-shaped information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reproducing method for a disk-shaped information recording medium which improves transfer rate of information recorded on a disk- shaped information recording medium such as an optical disk. SOLUTION: Information contents 200, 220 and 240 which are mutually different are respectively recorded on 1st disk-shaped information recording media 20 to 24 through on the n-th ((n) is a natural number) disk-shaped information recording media 20 to 24, the first frame of the contents 200 to 240 are read from the 1st disk-shaped information recording media 20 to 24, a certain frame of the contents 200 to 240 are read from the 2nd disk-shaped information recording media 20 to 24 and in this procedure, the certain frame of the contents 200 to 240 are read from the n-th ((n) is a natural number) disk-shaped information recording media 20 to 24 and the contents 200 to 240 are reproduced by arranging the read frame contents.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reproducing a plurality of disc-shaped information recording media.

[0002]

2. Description of the Related Art In general, a disk-shaped information recording medium has attracted attention for recording audio signals, image information, and the like. This disc-shaped information recording medium is, for example, a so-called ROM (read only memory) type information recording medium for reproducing only a signal called a video disc or a compact disc (trade name) or a write-once disc-shaped information recording medium. Information recording medium, a so-called WO (write once disk) and the like. Further, examples of the disc-shaped information recording medium include an optical disc-shaped rewritable information recording medium and a magneto-optical disc. A write-once disk, a rewritable optical disk, a magneto-optical disk, or the like can read and record information by laser light.

For example, a compact disk, which is an optical disk-shaped information recording medium, is provided with a reflective metal layer on the back surface of a pit of a recording layer on which a signal is recorded. When the laser light from the optical pickup is directed to the pits and the information of the pits is read, the light reflected from the reflective metal layer can reliably receive the return light from the pits on the optical pickup side.

[0004] For example, when information recorded on one compact disc is reproduced by a reproducing apparatus using a normal method, the reproduction is performed using a laser beam from an optical pickup as described above. There is an upper limit in hardware for the transfer rate of information on the optical disk on the device side.

[0005]

In order to increase the information transfer rate when reproducing information from a single disc-shaped information recording medium, it is necessary to change the physical standard of the disc-shaped information recording medium and to change the data format. You have to change the format, which is very troublesome. For example, data such as music data recorded on a disc-shaped information recording medium is
It is desirable to be able to reproduce at a high transfer rate. Moreover,
It is desired to be able to reproduce information recorded on the disc-shaped information recording medium at a high transfer rate even if a currently existing disc-shaped information recording medium is used. Accordingly, the present invention has been made to solve the above-mentioned problems, and to provide a reproducing method of a disc-shaped information recording medium capable of improving a transfer rate of information recorded on a disc-shaped information recording medium such as an optical disc. The purpose is.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a method for reproducing a disk-shaped information recording medium for reproducing information contents recorded on a plurality of disk-shaped information recording media almost simultaneously. Different information contents are recorded on the n-th (n is a natural number) disc-shaped information recording medium from the first disc-shaped information recording medium. The first frame of the information content is read from the information recording medium, the frame with the information content is read from the second disc-shaped information recording medium, and the n-th (n is a natural number) disc-shaped information is read in this manner. A method for reproducing information on a disk-shaped information recording medium, comprising reading out frames having information contents from the recording medium and reproducing the information contents by arranging the read out frame contents. By, it is achieved.

According to the present invention, there is provided a method of reproducing a disc-shaped information recording medium for reproducing information recorded on a plurality of disc-shaped information recording media almost simultaneously. Different information is recorded on the n-th (n is a natural number) disc-shaped information recording medium from the first disc-shaped information recording medium. The first frame of the information content is read from the first disc-shaped information recording medium, and the second disc-shaped information recording medium reads the frame content having the information content. A frame having information contents is read from the information recording medium in the shape of a letter. The information contents are reproduced by arranging the read frame contents.

Thus, frames of different information contents are read out from each disk-shaped information recording medium almost simultaneously,
Combine data alternately in a fixed order. It is possible to handle a data amount of a size obtained by multiplying the storage capacity of a normal single disc-shaped information recording medium by the number of disc-shaped information recording media. Further, since the information contents of a plurality of disc-shaped information recording media are reproduced almost simultaneously, the transfer rate is improved and the time required to read out necessary data is shortened. That is, since the information contents of a plurality of disc-shaped information recording media are reproduced almost simultaneously,
The storage capacity is increased and the information transfer rate can be improved as compared with the case where one disk-shaped information recording medium is reproduced.

According to the present invention, preferably, the frame contents of each disk-shaped information recording medium are read by an optical pickup arranged at a corresponding position.

[0010] In the present invention, preferably, each disc-shaped information recording medium is provided with a content information recording section, in which information indicating that each information recording medium is intended for simultaneous reproduction is recorded.

[0011]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIG. 1 shows an information content reproducing apparatus 10 for realizing a method of reproducing a disc-shaped information recording medium according to the present invention.
3 shows a preferred embodiment of the present invention. The information content reproducing apparatus 10 has a plurality of sets of information reproducing units 12, 14, and 16. In the reproducing apparatus 10 of FIG. 1, for simplification of the description, as described above, the three information reproducing units 12, 14, 1
6, but the number of information reproducing units is not limited to this, and may be two or four or more. Each of the information reproducing units 12, 14, and 16 has a similar structure, and can reproduce the information contents recorded from the optical disk-shaped information recording media 20, 22, and 24, respectively. is there. Disc-shaped information recording media 20, 22, 2
As the optical disk 4, for example, a compact disk (trade name) can be mentioned as an optical disk.

FIGS. 2 and 3 show examples of the structure of the disc-shaped information recording media 20, 22, and 24. FIG. The disc-shaped information recording media 20, 22, and 24 include a program area 26, a lead-in area 28, and a lead-out area 3.
It has 0. The lead-in area 28 is formed around the center hole 32 of the disc-shaped information recording medium.
The lead-out area 30 is formed on the outer peripheral portion of the program area 26. The program area 26 is a portion where necessary information contents are recorded. As shown in FIG. 3, the disc-shaped information recording media 20, 22, 24
For example, a substrate 36 having a light transmitting property is provided.
Are formed with pits 38. The pit 38 has a reflective film 40 for reflecting a reading laser beam.
Are formed. Further, a protective layer 42 is formed on the pit 38 and the reflection film 42.

The structure of the information reproducing units 12, 14, 16 in FIG. 1 will be described. The information reproducing section 12 reproduces information contents 42 recorded in the program area 26 of the disc-shaped information recording medium 20. Information reproducing unit 12
Can optically reproduce the information content 42 and the like of the disc-shaped information recording medium 20. Each information reproducing unit 12, 1
For the elements 4 and 16, those of the type generally used can be adopted. The chucking section 52 is attached to the spindle motor 50. The chucking unit 52 detachably holds the disc-shaped information recording medium 20 (22, 24). When the motor 50 operates, the chucking unit 52 and the disc-shaped information recording medium 20 (22,
24) rotates continuously in the direction 54.

The optical pickup 56 irradiates a laser beam L to the pit 38 recording the information content 42, for example, as shown in FIG. 3, a laser light source 58 transmits a laser beam L to an objective lens 60.
Is irradiated on the pit 38 side via the. The irradiated laser light L is returned by the reflection film 40 and becomes an objective lens 60.
And is reflected by the half mirror 62 and received by the light receiving unit 64. Based on the return light received by the light receiving section 64, a reproduction signal 66 of the information content is supplied to the signal processing section 68. The motor 70 turns the optical pickup 56 by rotating the feed screw 72.
It is also possible to move and position the disc-shaped information recording medium along the radial direction. The motor 70 operates based on the drive signal of the motor drive circuit 74.

The servo controller 76 includes a signal processing unit 6
By using the tracking error signal and the focus error signal obtained from the so-called conventional optical pickup 56 obtained from the optical pickup 8 and the like, the optimal position control of the objective lens 60 is performed, so that the laser light L is adjusted to an appropriate position. Of the pit 38 can be irradiated. In addition, the servo controller 76 controls the spindle motor 50, the motor drive circuit 74, and the like. After processing the reproduction signal 66 into a predetermined signal, the signal processing unit 68 outputs a signal 80A (80
B, 80C) to the control unit 82. Thus, the information reproducing units 12, 14, 16 have the same structure, and the signals 80A, 80B,
80C is all supplied to the control unit 82. This control unit 82 is connected to an external device 84.

As shown in FIG. 4, what is characteristic and important is that the program areas of the disc-shaped information recording media 20, 22, and 24 have different information contents 200, respectively.
220 and 240 are recorded in advance. For example, as the information content 200, * 123
Information contents such as * 456 * 789 *... Are recorded. The information content 220 has * ABC * DEF * GHI *... Different from the information content 200.
The information contents 240 have * abc * def * ghi *... Different from the information contents 200 and 220. Thus, each disk-shaped information recording medium 20,
Information contents 200, 220,
Reference numeral 240 denotes mutually different information contents, such as music information, measurement data, and image information. Information content 20
0, 220 and 240 are derived from the original data 300.
Each is divided and recorded in advance. That is, as shown in FIG. 4 and FIG.
Since then, different data as data to be recorded on the information recording media 20, 22, and 24 are divided and encoded in advance.

Next, referring to FIG. 1, FIG. 5, and FIG. 6, the original data 30 is extracted from the information contents 200, 220, and 240 recorded on each of the information recording media 20, 22, and 24.
An example of reproducing the data 340 of the reproduction frame content corresponding to 0 will be described. Each of the chucking units 52 of the reproducing apparatus 10 shown in FIG.
Is attached. As described above, different information contents 200, 220, and 240 are previously recorded on the disc-shaped information recording media 20, 22, and 24, respectively, as shown in FIG. The servo controller 76 operates the spindle motor 50 to rotate the disc-shaped information recording media 20, 22, 24 continuously or preferably simultaneously at the same time, and sends the reproduction signal 66 from the optical pickup 56 to the signal processing unit 68. .

That is, as shown in FIG. 5, the first frame 190 (* 123) of the information content 200 shown in FIG. It is sent to the processing section 68. The signal processing unit 68 sends a signal 80A to the control unit 82 based on the reproduction signal 66. The frame 191 in the information content 220 of the disc-shaped information recording medium 22 is (* ABC), and this frame 191 is sent to the signal processing unit 68 as a reproduction signal 66. The signal processor 68 sends the signal 80B to the controller 82 based on the reproduction signal 66. Similarly, the frame 192 of the information content 240 shown in FIG. 4C of the disc-shaped information recording medium 24 is (* abc), and this frame 192 is transmitted to the signal processing unit 68 as the reproduction signal 66. Can be The signal processing unit 68 controls the reproduction signal 6
6 to the control unit 82 as a signal 80C.

Thus, the control unit 82 shown in FIG. 1 alternately arranges and combines the signals 80A, 80B, and 80C in a predetermined order. For example, as shown in the data 340 of the reproduction frame content as shown in FIG.
191, 192... Are combined. The data 340 of the content of the playback frame can be decoded by repeating such operations, but the content matches the data 300 rearranged by the playback system as shown in FIG. Is what you do. In this way,
Different information is stored in advance in each disc-shaped information recording medium, and the information stored in these disc-shaped information recording media is reproduced almost simultaneously or simultaneously, whereby each disc-shaped information recording medium is reproduced. The frames are read out almost simultaneously or simultaneously from the recording medium, and the frame data are alternately combined in a predetermined order. As a result, frames are read from a plurality of disc-shaped information recording media as compared with the storage capacity of a normal one disc-shaped information recording medium. The capacity can be handled. Therefore, a large amount of data can be reproduced at a high transfer rate.

The transfer rate at which data can be transferred from a single disk-shaped information recording medium has an upper limit in terms of hardware in each information reproducing unit, but a plurality of information recording units can be used to simultaneously record a plurality of information. In order to read a frame from a medium, the time required to retrieve necessary data can be considerably shortened. By increasing the number of information reproducing units and the number of disc-shaped information recording media, a larger data storage capacity can be handled, and the time for reading data can be further reduced. Moreover, since the disc-shaped information recording media 20, 22, and 24 themselves can use the conventional disc-shaped information recording media, there is no need to change the physical standard of the information recording media or change the data format. . That is, since the disc-shaped information recording medium can be used as it is, no change is required in the manufacturing apparatus and format, and high-density information can be read out more quickly than at present.

The data 100 of the reproduction frame content as shown in FIG. 5 created by the control unit 82 is, for example, a DA converter (digital / analog converter) as shown in FIG.
After the digital signal is converted into an analog signal by 110 and supplied to the speaker 114 via the amplifier 112, for example, music information can be reproduced.

In FIG. 8, the data 10 of the contents of the reproduced frame are shown.
0 is MPEG (Moving Picture Ex
parts Group / Moving Pictur
eImage Coding Experts Gro
up, an organization promoting the standardization work of the color moving picture coding method, or the coding method standardized there) board 116
Thus, the image can be displayed on the monitor 118 by performing the encoding process. In this case, the data 100 of the reproduction frame content is image data. In FIG. 9, similarly, the MPEG board 116 is used to
For example, image information or the like can be supplied to 0.

In the embodiment of the present invention, the disc-shaped information recording media 20, 22, 24 are exemplified by an optical disc such as a compact disc.
Although such an information recording medium does not have a case, FIG. 10 shows an example of a disc-shaped information recording medium having a case 130. The disc-shaped information recording medium 140 is an example of a so-called mini disc (magneto-optical disc: trade name), and the disc-shaped information recording medium 140 is incorporated in a case. Such a disc-shaped information recording medium 140 can also be used. In the embodiment of the present invention, three disk-shaped information recording media are used, and n = 1, 2, 3, but not limited to this, n = 1, 2, or n = 1, 2, 3, 3. , 4 ...
A higher information transfer rate can be obtained by using a larger number of information recording media such as.

In the embodiment of the present invention, an optical disk such as a compact disk, a magneto-optical disk such as a mini disk, an MO (Magneto-Optical)
In addition to the magneto-optical disk such as s), the disk of the present invention is also used when reproducing an information recording medium called a digital versatile disk or a digital video disk (DVD) which is a high-density information recording medium at that time. A method of reproducing an information recording medium in the shape of a letter can be applied.

The disc-shaped information recording medium 2 shown in FIG.
In the lead-in areas 28 of 0, 22, and 24, Tabl
An e of Contents (TOC, content information recording unit) area is provided, and these information recording media 20 and 2 are provided.
It may be indicated that the discs 2 and 24 are discs for simultaneous reproduction.

[0027]

As described above, according to the present invention,
It is possible to improve the transfer rate of information recorded on a disc-shaped information recording medium such as an optical disc.

[Brief description of the drawings]

FIG. 1 is a diagram showing a preferred embodiment of an information content reproducing apparatus for carrying out a disc-shaped information recording medium reproducing method of the present invention.

FIG. 2 is a perspective view showing an example of a disc-shaped information recording medium.

FIG. 3 is a cross-sectional view showing a structural example of a disc-shaped information recording medium.

FIG. 4 is a diagram showing an example of information content recorded on each disc-shaped information recording medium.

FIG. 5 is a diagram showing an example of data of a reproduction frame content obtained from each disc-shaped information recording medium.

FIG. 6 is a diagram showing an example of data read from each disc-shaped information recording medium and data of a reproduction frame content rearranged by the data.

FIG. 7 is a diagram showing an example in which data obtained by the reproduction method of the present invention is used for audio reproduction.

FIG. 8 is a diagram showing an example in which data obtained in the present invention is used for image reproduction.

FIG. 9 is a diagram showing an example in which data obtained by the present invention is taken in as data of a computer.

FIG. 10 is a diagram showing another example of a disc-shaped information recording medium used in the present invention.

[Explanation of symbols]

10 Information reproducing device, 12, 14, 16,...
An information reproducing unit, 20, 22, 24 ... an information recording medium in the form of a disk, 82 ... a control unit, 84 ... an external device,
200, 220, 240: information contents of a disc-shaped information recording medium, 300: original data, 340
... Data of playback frame contents

Claims (3)

[Claims] The present invention relates to a disc-shaped information recording medium for reproducing information contents recorded on a plurality of disc-shaped information recording media at substantially the same time. Different information contents are recorded on the n-th (n is a natural number) disk-shaped information recording medium, and the first frame of the information content is read from the first disk-shaped information recording medium, A frame having information content is read from the second disk-shaped information recording medium,
In this manner, frames having information contents are read from the n-th (n is a natural number) disk-shaped information recording medium, and the information contents are reproduced by arranging the read frame contents. A method for reproducing a disc-shaped information recording medium. 2. The method according to claim 1, wherein the frame content of each disc-shaped information recording medium is read by an optical pickup disposed at a corresponding position. 3. The disc according to claim 1, wherein a content information recording section is provided on each disc-shaped information recording medium, and information indicating that each information recording medium is intended for simultaneous reproduction is recorded on the content information recording section. Method for reproducing an information recording medium.