JPH0264986A - Optical multidisk reproducing device - Google Patents

Abstract

PURPOSE:To prevent that the disk number and the track number of a disk to be reproduced are erroneously designated by previously storing the existence of each disk, the track number of the disk stored in a specific position, and information (TOC) of the length of a piece of music, etc., corresponding to the track number. CONSTITUTION:A disk changing controller 1 takes out the first disk by the command of a arithmetic logic unit 4, and when another disk exists, a disk reproduction controller 2 reproduces the disk, reads the TOC, and stores the existence of the disk and the TOC in a memory 3. Next, the disk number and the track number are designated, it is judged whether the contents stored in the memory 3, the designated disk number, and the designated track number exist or not, and when they exist, the disk changing controller 1 takes out the designated disk, and the disk reproduction controller 2 reproduces the designated track. Thus, it can be eliminated that the disk number and the track number are erroneously designated.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an optical disc playback device such as a compact disc player.

2. Description of the Related Art A conventional optical multi-disc reproducing apparatus of this type has a configuration as shown in FIG. That is, a disk swapping control device 21 controls disk swapping according to commands from the logical operation device 23, and a disk playback control device 22 controls disk playback according to commands from the logical operation device 23.
This is a multi-disc playback device consisting of:

The operation of the conventional example described above was as shown in FIG.

In step 1, an arbitrary number of discs are inserted into the storage position of the disc replacement control device 21, in step 2, the disc number and track number to be played are specified, and in step 3, the disc replacement control device 21 is The specified disk is taken out, and in step 4, the logic unit 23 determines whether the specified disk exists or not. If the disk does not exist, execute step 8 and subsequent steps, and if the disk exists, execute step 5. In step 6, the disk playback control device 22 reads the TOC (information such as the track number of the disk stored at a specific position on the disk and the length of the song corresponding to the track number) according to the command from the logical operation device 23, and then The arithmetic unit 23 is T
It is determined whether or not the specified track exists based on the OC contents. If the track does not exist, steps 8 and subsequent steps are executed. If the track exists, the logic operation unit 2 is executed in step 7.
In step 3, the disk reproduction control device 22 reproduces the specified track in accordance with the command 3, and in step 8, the disk exchange control device 21 returns the disk to the magazine in accordance with the command of the logical operation device 23, and steps 2 and subsequent steps are executed.

Problems to be Solved by the Invention However, the conventional optical multi-disc playback device described above has the following problems. That is, the presence or absence of each disk is not known, and furthermore, since the TOC of each disk is not available, the track number is not known. Therefore, when playing by specifying the disk number and track number, after specifying the disk number and track number, the disk is removed, the existence of the disk is determined, and the TOC is
Since the existence of a track is determined after it is read, it takes time to determine whether or not it will be played, resulting in specification errors.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an optical multi-disc playback device that does not cause mistakes in specifying the disk number and track number to be played back.

Means for Solving the Problems The present invention includes a disk exchange control device that has a plurality of storage positions for optical disks and controls the replacement of disks in the storage positions, a disk playback control device that controls playback of the optical disks, and A storage device stores the presence or absence of a disk and the TOC of each disk, and a disk replacement control device takes out the first disk, and if a disk exists, a disk playback control device plays the disk, reads the TOC, and stores it in the storage device. If the disk does not exist, it is stored in the storage device, and after the disk is replaced and the presence or absence of a disk in each storage position and the TOC of each disk are stored in the storage device for all storage positions. , and a logical arithmetic unit that performs reproduction.

Further, the disc playback control device is characterized in that it includes a high-speed playback control section that controls playback of the optical disc at high speed, and reads the TOC at high speed.

For production The effects of the present invention using the above means are as follows.

That is, by storing the presence/absence of each disc and the ToC, mistakes in specifying the disc number and track number to be played back can be eliminated.

Embodiment Hereinafter, an optical multi-disc reproducing apparatus according to a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention, which includes a disk swapping control device 1 that controls swapping of optical disks according to commands from a logic operation device 4, and a disk swapping control device 1 that controls playback of optical disks. Disc playback control device 2
This is an optical multi-disc playback device consisting of a storage device 3 that stores the presence or absence of each disc and the TOC of each disc.

FIG. 2 is a flowchart showing the main part of the operation of the first embodiment of the present invention. In step 1, the disk replacement control device 2
An arbitrary number of disks are inserted into storage position 1, and in step 2, the disk exchange control device 1 takes out the first disk according to a command from the logical operation device 4, and in step 3, it is determined whether or not a disk exists. , if the disc does not exist, execute Step 6 and subsequent steps; if a disc exists, in Step 4, the disc playback control device 2 plays the disc and reads the TOC according to the command from the logical operation unit 4, and in Step 6, it is determined whether or not there is a disc. and TOC are stored in the storage device 3, and in step 6 it is determined whether or not all the disks have been used. When all the disks have been used, steps 8 and later are executed, and if all the disks have not been used (step 7) In response to a command from the logic unit 4, the disk replacement control device 1 replaces the next disk with the next one, and executes the steps from step 3 onwards.In step 8, the disk number and track number are specified, and in step 9, the contents stored in the storage device 3 are specified. Determine whether the specified disc scent and track number exist or not 1-2
, Existence 1 - If not, execute step 8 and subsequent steps, and if it exists, in step 10, the disk exchange control device 1 takes out the specified disk according to the command from the logical operation device 4,
In step 11, the disk playback control device 2 plays the specified track according to the command from the logical operation device 4, and in step 12, the disk exchange control device 1 returns the disk according to the command from the logical operation device 40, and executes steps 8 and onwards.
゜As described above, according to this embodiment, by reading and storing (,) the childless and TOC of all disks at @ when playback is started, mistakes in specifying disk numbers and track numbers can be eliminated. be able to.

FIG. 3 is a block diagram showing the configuration of a second embodiment of the present invention, which includes a disk swapping control device 11 that controls swapping of optical disks according to instructions from a logic operation device 14, and a disk swapping control device 11 that controls optical disk playback based on instructions from a logic operation device 14. The configuration is similar to that shown in FIG. 1 up to the point that it includes a disk playback control device @12 for controlling the disks, and a storage device 13 for storing the presence/absence of each disk and the TOC of each disk.

The difference from the configuration shown in FIG. 1 is the disk playback control device 12.
The point is that a high-speed reproduction control section 16 is provided inside. The high-speed playback control unit 16 controls the playback of the disc at a high speed while reading the TOC of the disc in response to instructions from the logical arithmetic unit 14.

In the first embodiment, the presence or absence of all disks and the T of all disks are
It took a long time to read and store the OC, so there was a long wait time before starting playback. In the second embodiment, a high-speed playback control section 16 is included in the disk playback control device 12.
By providing a system and controlling the reproduction of the disc at high speed while reading the TOC, it is possible to shorten the time to read the TOC of all discs and reduce waiting time.

Effects of the Invention The present invention provides a disk replacement control device that has a plurality of storage positions for optical disks and controls the replacement of the disks in the storage positions, a disk playback control device that controls playback of the optical disks, and a disk playback control device that controls the presence or absence of each disk. A storage device that stores the TOC of each disk, and a disk exchange control device take out the first disk, and if a disk exists, a disk playback control device plays the disk, reads the TOC, and stores it in the storage device L7, disk If it does not exist, it is stored in the storage device that it does not exist, and after replacing the disks and storing the presence or absence of a disk in each storage position and the TOC of each disk in the storage device, playback is performed. By providing a logic operation device, it is possible to eliminate mistakes in specifying the task number and track number.

In addition, the disc playback control device is equipped with a high-speed playback control unit that controls the playback of optical discs at high speed, and by reading TOCs at high speed, it is possible to shorten the time to read the TOCs of all discs and reduce waiting time. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an optical multi-disc playback device according to a first embodiment of the present invention, FIG. 2 is a flowchart of main parts showing the operation of the first embodiment of the present invention, and FIG. A block diagram of the optical multi-disc playback device of the first embodiment, FIG. 4 is a block diagram of the conventional optical multi-disc playback device, and FIG. 5 is a main part showing the operation of the conventional optical multi-disc playback device. It is a flowchart. 1... Disk replacement control device, 2...
... Disc playback control device, 3... Storage device,
4... Logical operation device, 11... Disk replacement control device, 12... Disk playback control device, 13... Storage device, 14...-・・・
Logic operation device, 15... High speed playback control section, 21
...Disk replacement control device, 22...
. . . Disc playback control device, 23 . . . Logical operation device. Figure Figure Figure Figure Figure

Claims (2)

[Claims] (1) A disk replacement control device that has storage positions for a plurality of optical disks and controls the replacement of the disks in the storage positions, a disk playback control device that controls playback of the optical disks, and a disk replacement control device that controls the presence or absence of each disk. T of each disk
A storage device that stores the OC and a disk swapping control device take out the first disk, and if the disk exists, the disk playback control device plays the disk, reads the TOC, and stores it in the storage device. A logical arithmetic unit that stores in a storage device that the disk does not exist if it does not exist, stores the presence or absence of a disk in each storage position and the TOC of each disk in the storage device for all storage positions by replacing the disk, and then performs playback. An optical multi-disc playback device comprising: (2) The disc playback control device includes a high-speed playback control unit that controls playback of the optical disc at high speed, and
2. The optical multi-disc playback device according to claim 1, wherein the optical multi-disc playback device reads: