JPH08273277A - Both-face reproducing disk and disk reproducing device - Google Patents

Abstract

PURPOSE: To provide a device not transferring to reproduction even when a program number not existing in the surface of an opposite side is selected by providing information indicating the number of programs recorded in each surface and a first program number in both surfaces of a both faces of a reproducing disk. CONSTITUTION: When a reproducing instruction is issued from an operation control circuit 27, a disk driving device 22 rotates a disk 21 up to a specified rotational number. An optical pickup moving device 24 moves an optical pickup 23 to the inner periphery of the disk 21 and reads an information signal 11 by the optical pickup 23. At this time, information 12 indicating the number of programs recorded in a first disk and information 13 indicating a first program number recorded in the first disk are stored in the storage part 28 of a disk reproducing device. Simultaneously, information 14 indicating the number of programs recorded in a second disk and information 15 indicating a first program number recorded in the second disk are stored in the storage part 28 and the transfer of the disk reproducing device to the opposite surface is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided reproducing disc capable of reading data from both sides.

[0002]

2. Description of the Related Art In recent years, the signal transfer in audio / video equipment has been digitized, and the control of the disk reproducing device is often performed by a microcomputer, and the operation of the disk reproducing device has been simplified. Therefore, it is desired that various information signals be recorded on the disc to be reproduced.

Information signals recorded in a laser vision disc as an example of a conventional double-sided reproduction disc will be described below.

FIG. 3 shows an information signal called TOC recorded on a laser vision disc.

In FIG. 3, reference numeral 31 is an information signal area. 32 is an information area for the number of programs recorded on that surface, 33 is an information area for the number of the first program on that surface, and 34 is another information area, and the programs recorded on the opposite surface. No information about the number of the first program recorded on the opposite side is recorded.

FIG. 4 is a system block diagram of a conventional disc reproducing apparatus capable of automatically reproducing both sides of a double-sided reproducing disc.

In FIG. 4, 41 is a double-sided reproduction disc,
42 is a disk drive device for rotating the disk 41, 4
3 is an optical pickup for reading a signal from the disc 41,
Reference numeral 44 is an optical pickup moving device for moving the optical pickup 43 to the opposite surface of the disc 41, 45 is a servo circuit for rotating the disc 41 and controlling the optical pickup 43, and 46 is for demodulating a signal read from the disc 41. A signal demodulation circuit, 47 is an operation control circuit for controlling the operation of the disc reproducing apparatus.

The operation of the reproduction of the laser vision disc on which the information signal having the above-mentioned structure is recorded will be described below. First, when a reproduction instruction is issued from the operation control circuit 47, the disc drive device 42 rotates the disc 41 up to a predetermined number of revolutions, and the optical pickup moving device 44 moves the optical pickup 43 to the inner circumference of the disc 41. The signal 31 is read by the optical pickup 43, and reproduction of data is started. After that, when the operation control circuit 47 gives an instruction to specify the program number on the opposite side to reproduce, the optical pickup driving device 44 moves the optical pickup 43 to the inner circumference of the opposite side, and The signal 31 is read by the optical pickup 43, the specified program is accessed, and reproduction is started.

[0009]

However, in the above conventional configuration, the information signal of the first read surface does not contain the program number recorded on the opposite surface, so that the information on the opposite surface is not recorded. Even if a program number that is not on the surface is selected, the disc reproducing apparatus has a problem that the reproduction on the opposite surface is started.

The present invention solves the above-mentioned problems of the prior art. When a program number which is not on the opposite surface is selected, the disc reproducing apparatus does not shift to reproduction on the opposite surface. It is an object of the present invention to provide a double-sided reproduction disc and a disc reproduction device capable of performing the reproduction.

[0011]

In order to achieve this object, a double-sided reproducing disc according to the present invention has a number of programs recorded on a first disc, a number of a first program recorded on the first disc, and a first program number. The present invention has a configuration in which information on the number of programs recorded on the second disc and the number of the first program recorded on the second disc is provided for both the first disc and the second disc. The disk reproducing apparatus includes a double-sided reproducing means for detecting data from a double-sided reproducing disk, a demodulating means for inputting data from the double-sided reproducing means and demodulating into a signal, and a control means for inputting a demodulated signal from the demodulating means and controlling the double-sided reproducing means. And storage means for inputting and outputting information from the control means and storing the information. Accordingly, it is intended to control means for controlling the double-sided reproducing means.

[0012]

With this configuration, the disc reproducing apparatus reads the information signal recorded on any surface of the mounted double-sided reproducing disk to determine the number of programs on each side of the mounted double-sided reproducing disk, and The disc reproducing apparatus does not shift to the reproduction of the opposite side even if the number of the program which is not on the opposite side is selected by mistake because the number of the first program on the side is recognized and stored in the storage means. Can be configured.

[0013]

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

FIG. 1 shows an information signal diagram of a double-sided reproducing disk according to an embodiment of the present invention.

In FIG. 1, 11 is an information signal area of the first disk, 12 is an information area showing the number of programs recorded on the first disk, and 13 is the number of the first program recorded on the first disk. Information area, 14 is an information area indicating the number of programs recorded on the second disc, 15
Is an information area indicating the number of the first program recorded on the second disc, and 16 is another information area.

FIG. 2 is a system block diagram of a disc reproducing apparatus capable of automatically reproducing both sides of a disc. In FIG. 2, reference numeral 21 denotes a double-sided reproduction disc,
The first disc and the second disc are bonded together, and the above-mentioned information signal shown in FIG. 1 is input to the first disc. Reference numeral 22 is a disk drive device for rotating the disk 21, 23 is an optical pickup for reading a signal from the disk 21, 24 is an optical pickup moving device for moving the optical pickup 23 to the opposite surface of the disk 21, and 25 is for rotating the disk 21. A servo circuit for controlling the optical pickup 23, which forms a double-sided reproducing means. Reference numeral 26 is a signal demodulation circuit that demodulates a signal read from the disc 21, 27 is an operation control circuit that controls the operation of the disc reproducing apparatus, and 28 is a storage unit that stores the information signal read from the disc 21.

The operation of the double-sided reproducing disk and the disk reproducing apparatus of this embodiment constructed as described above will be described with reference to FIGS. 1 and 2. First, when a reproduction instruction is issued from the operation control circuit 27, the disk drive device 2
2 rotates the disk 21 to a predetermined number of rotations, and the optical pickup moving device 24 moves the optical pickup 23 to the disk 2
The information signal 11 is read by the optical pickup 23 after being moved to the inner circumference of 1, and the information 12 indicating the number of programs recorded on the first disc therein and the number of the first program recorded on the first disc. Information indicating 13 and the second
Information indicating the number of programs recorded on the disc
Then, the information 15 indicating the number of the first program recorded on the second disc is read, and the storage unit 28 of the disc reproducing apparatus is read.
To memorize. When an instruction is given to reproduce a program number which is not present on the opposite surface, the disc reproducing apparatus is prevented from shifting to reproduction on the opposite surface.

As described above, according to this embodiment, the number of programs recorded on each side and the number of the first program on each side are recorded in the control signal recording section of the double-sided reproduction disc, and By storing the information in the storage means, it is possible to configure a disc reproducing apparatus that does not shift to reproduction of the opposite surface even when a program number that is not on the opposite surface is selected.

In the first embodiment shown in FIG. 2, an example in which one pickup is moved to both sides by an optical pickup moving device as the double-sided reproducing means and information is reproduced is shown, but the invention is not limited to this. For example, even if two optical pickups corresponding to the first disc and the second disc are provided and the outputs thereof are switched, the same effect can be obtained.

[0020]

As described above, according to the present invention, both sides of a double-sided reproduction disc are provided with information indicating the number of programs recorded on each side and the number of the first program on each side. It is possible to realize an excellent double-sided playback disc that can be configured as a disc playback device that does not shift to playback on the opposite side when a program number not on the opposite side is selected.

[Brief description of drawings]

FIG. 1 is an information signal diagram of a double-sided reproduction disc according to a first embodiment of the present invention.

FIG. 2 is a system block diagram of a disc reproducing apparatus according to the first embodiment of the present invention.

FIG. 3 is an information signal diagram of a conventional double-sided reproduction disc.

FIG. 4 is a system block diagram of a conventional disc reproducing apparatus.

[Explanation of symbols]

11 information signal area of the first disc 12 information area indicating the number of programs recorded on the first disk 13 information area indicating the number of the first program recorded on the first disk 14 on the second disk Information area indicating the number of recorded programs 15 Information area indicating the number of the first program recorded on the second disc 16 Other information area of the first disc 21 Double-sided reproduction disc 22 Disc drive device 23 Optical pickup 24 Optical Pickup Driving Device 25 Servo Circuit 26 Signal Demodulation Circuit 27 Operation Control Circuit 28 Storage Unit

Claims (2)

[Claims] 1. A double-sided reproduction disc in which a first optical disc and a second optical disc are laminated, and the number of programs recorded on the first disc and the number of the first program recorded on the first disc. And information about the number of programs recorded on the second disc and the number of the first program recorded on the second disc, both of the first disc and the second disc. Features double-sided playback disc. 2. A double-sided reproducing means for detecting data from the double-sided reproducing disk according to claim 1, a demodulating means for inputting data from the double-sided reproducing means and demodulating into a signal, and a demodulated signal for inputting the demodulated signal from the demodulating means. Information of the first or second optical disk of the double-sided reproduction disk stored in the storage means, which comprises a control means for controlling the double-sided reproduction means and a storage means for inputting and outputting information from the control means. According to the above, the control means controls the double-sided reproduction means.