JP2591170Y2 - CD / CD-ROM combined changer system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD / CD-ROM changer player, and more particularly, to shortening the time until the start of CD-ROM reproduction, so that the data output of a CD-ROM is required in a system. The present invention relates to a CD / CD-ROM dual-purpose changer player that can shorten the time until data output.

[0002]

2. Description of the Related Art There is a CD player with an automatic change function for storing a plurality of audio CDs in a magazine, taking out a desired CD from the magazine, and playing the CD. According to such a CD player with an auto change function, a long time reproduction can be continuously performed from the first CD to the last CD, and a desired CD can be selected and reproduced from a large number of CDs. It is very convenient in an environment where music is played for a long time.

A CD-ROM as an information storage medium has the same shape as an audio CD, and has a similar information storage format. For this reason, CD-ROM playback devices
It has the same configuration as the corresponding part of the audio CD player. If a circuit part peculiar to the CD-ROM is added to the CD player, a dual-purpose device for the audio CD and the CD-ROM can be constituted. Therefore, recently, a CD changer player has been added with a circuit specific to a CD-ROM.
A / CD-ROM changer player has been proposed.

[0004]

[Problems to be Solved by the Invention] Such CD / CD-R
In an OM / changer player, if an audio CD and a CD-ROM are mixed in the loaded magazine, the audio CD or the CD must be read after reading the TOC information of the selected and designated disc. -I don't know if it's a ROM. Therefore, the method of waiting for the player when the disc is loaded cannot be uniquely determined.

Generally, a system controller is a CD.
-After issuing a data transfer request to the ROM player,
If the data is not transferred within a few seconds to the system controller that receives the data obtained by reproducing the D-ROM, the system controller determines that the reproduction of the CD-ROM has failed. Although the time until playback must be shortened, as described above, when an audio CD and a CD-ROM are mixed in a magazine, a standby method cannot be determined. Therefore, it is necessary to decide one of them, but if the standby method is set to the audio CD, the above-described problem occurs, and the CD-R
There is a drawback in that the current consumption increases when adjusted to OM, and as a result, the player body generates heat.

As described above, an object of the present invention is to reduce the time from when a CD-ROM playback request is issued from a host computer to when a playback operation is performed, and to shorten the communication time with the host computer. It is to provide a changer player.

[0007]

According to the present invention, there is provided a selection means for selecting a desired disc from a magazine containing a plurality of audio CDs and CD-ROMs, and reproducing the selected disc. In a CD / CD-ROM changer system provided with a reproducing means, a storage means for storing TOC information in advance corresponding to a disc; a reading means for reading TOC information of at least two or more discs in the magazine; Writing means for writing the TOC information of each disk read by the reading means into the storage means; determining means for determining whether the disk is an audio CD or CD-ROM based on the TOC information; When a disk is selected, TOC information corresponding to the selected disk is stored in the storage means. With out seen, the disc on the basis of the TOC information is discriminated by said discriminating means whether the audio CD or CD-ROM, the disc is CD-RO
A system controller for stopping the disc by the playback means when the disc is determined to be M, and stopping the disc by the playback means when the disc is determined to be an audio CD; It is solved by having.

[0008]

In the CD / CD-ROM changer system configured as described above, the TOC information of at least two or more disks in the magazine is read, and the read TOC information of each disk is made to correspond to the disk. The TOC information is stored in the storage means in advance, and when a desired disk is selected by the selection means, the TOC information corresponding to the selected disk is read out from the storage means, and the TOC information is read based on the TOC information. Discriminates whether the disc is an audio CD or a CD-ROM. When the disc is discriminated as a CD-ROM, the disc is made to stand by in a rotation pause. When the disc is discriminated as an audio CD, the disc is discarded. Stop and wait.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a CD / CD-ROM changer player according to the present invention.

Reference numeral 1 denotes a plurality of audio CDs and CD-Rs.
Magazine containing OM, 2 is designated CD or C
A disk change mechanism for taking out the D-ROM from the magazine and setting it in the player, 2a is a magazine loading detector for detecting that a magazine has been inserted into the disk change mechanism 2, 3 is a turntable, 4 is an optical pickup, 5 is RF An amplifier 6 that performs an error detection and correction process on the input data and performs various processes;
Reference numeral 7 denotes a system controller having a microcomputer configuration including data read / write processing with a memory, 8 denotes a DA converter that converts digital audio data into analog data, 9 denotes a low-pass filter, 10 denotes a servo controller, and 11 denotes a feed motor that moves a pickup. A spindle motor 12 rotates the disk at a constant linear velocity.

When reproducing an audio CD, the signal processing unit 6 executes various processes including a first error correction process, and performs error detection and detection based on the correction code CIRC.
The correction processing is performed, and the processing result is output as digital data. When reproducing a CD-ROM, the processing result is output to a second error correction circuit at a subsequent stage. The TOC information of each disk is output to the system controller 7 for processing and storage. Reference numeral 15 denotes a nonvolatile memory.

Reference numeral 13 denotes a CD subjected to the first error correction processing.
A second error correction circuit 14 for performing a second error correction process on the ROM data, and 14 is an interface circuit with a host computer 21 described later. Second error correction circuit 1
No. 3 has a high reliability of 10-12 bit error rate.
It is provided to secure in the ROM, and corrects an error that could not be corrected in the first error correction processing. 22
Reference numeral denotes a control unit for operating the changer player, which comprises an operation unit including a host computer 21 for communicating with the system controller 7, a disc select key 23, a disc discrimination designation key 24, and the like.

FIG. 2 shows a CD / CD-ROM according to the present invention.
It is a flowchart explaining operation | movement of a combined changer system. Hereinafter, the operation of the present invention will be described based on this flowchart.

When a magazine 1 in which an audio CD and a CD-ROM are mixed is loaded into a CD / CD-ROM player, a magazine loading detection signal is input from a magazine loading detecting section 2a to a system controller 7 (step 1).
01).

The system controller 7 having detected the magazine loading detection signal loads the audio CDs or CD-ROMs stored in the magazine 1 into the disc change mechanism 2 one by one. When the first disk is loaded, the system controller 7 sends the loaded disk 3
And outputs a signal requesting the servo controller 10 to perform processing for reading the TOC information. Upon receiving the signal, the servo controller 10 controls the spindle 12 and the optical pickup 4 to perform a series of processes for activating various servos. As a result, the signal processing unit 6 performs error correction and other processing on the data read by the optical pickup, and outputs TOC information to the system controller 7. The system controller 7 writes the input TOC information in the memory 15 together with the information of the first sheet,
The first disc is stored in the magazine 1. The above operation is performed on all the disks in the magazine 1 (step 1
02, 103). As a result, the types of all the disks in the magazine are stored in the memory 15.

Next, when there is a disk exchange instruction from the host computer 21 (step 104), the system controller reads the TOC information of the specified disk from the memory and determines whether it is an audio CD or CD-ROM (step 105). ).

If the disc is a CD-ROM, the system controller 7 loads the disc designated by the disc change mechanism 2 (step 10).
6), the spindle motor 12 is rotated with respect to the servo controller 10 to start focus servo, tracking servo, and spindle servo. Based on the TOC information of the disk stored in the memory 15, the head address of the data area of the disk is determined. The optical pickup is searched, the spindle motor 12 is kept rotating, and the servo controller 10 is instructed to repeat the reproduction at the current address position until the next reproduction address is designated (step 107). As a result, if there is a reproduction instruction from the host computer 21, the search can be immediately started toward the designated position and reproduced.

If it is determined in step 105 that the disc is an audio CD, the system controller 7 loads the disc designated by the disc change mechanism 2 and performs the same operation as described above.
The rotation of the spindle motor 12 is stopped until the host computer issues a reproduction instruction.

As described above, when a CD-ROM is selected, the time required for reproduction can be reduced by searching the TOC information in the memory 15 and keeping the disk kept rotating. In the above-described embodiment, the TOC reading is performed when the magazine is inserted. However, the reading instruction may be performed by operating the disc determination key.

[0020]

[Effect of the Invention] According to the present invention, an audio CD is used.
In the case of, the pause state is stopped, and in the case of a CD-ROM, the pause state is set to the rotation pause, so that not only the heat generation of the player body is reduced as compared to the pause state in which only the rotation pause is set, but also the CD-ROM is selected. In this case, the standby time is at the rotating port, so that the time until the start of the CD-ROM reproduction can be shortened and the reproduction data can be output immediately, so that the normal reproduction operation can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a CD changer player according to an embodiment of the present invention.

FIG. 2 is a flowchart showing CD exchange control and performance control processing of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magazine 2 Disk change mechanism 3 Disk 4 Optical pickup 5 Signal processing unit 7 System controller 10 Servo controller 11 Actuator 12 Spindle motor 13 Second error correction circuit 15 Memory 21 Host computer 22 Control unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G11B 19/12 501 G11B 19/12 501N

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of audio CDs and CD-ROs
C comprising: a selecting unit for selecting a desired disk from a magazine in which M is stored; and a reproducing unit for reproducing the selected disk.
In a D / CD-ROM changer system, storage for storing TOC information in advance corresponding to a disk
Means and the TO of at least two or more disks in the magazine
Reading means for reading C information, and TOC information of each disk read by the reading means
Means for writing to the storage means, and an audio CD or CD-ROM based on the TOC information.
Discriminating means for discriminating whether a disc is present, and when a desired disc is selected by the selecting means
The TOC information corresponding to the selected disk is
Read from the storage means and based on the TOC information
Whether the disc is an audio CD or a CD-ROM
The disc is discriminated by a discriminating means, and the disc is
When discriminated, the playback means rotates the disc.
Stand by in a pause pose and the disc is for audio
When it is determined that the disc is a CD, the reproduction means outputs the disc.
And a system controller for stopping the disk and making it stand by.