JPH0668150U - CD / CD-ROM combined changer system - Google Patents

Abstract

(57) [Abstract] [Purpose] To shorten the time from the CD-ROM playback request from the host computer to the playback operation. [Structure] The system controller 7 reads the TOC information of each disc in the magazine 1 and discriminates each disc by discriminating means 2a whether it is an audio CD or a CD-ROM. The discriminated information is stored in the memory 15, and when the disc is selected by the selection instruction means 23 for instructing the selection of a desired disc, the system controller 7 determines that the disc selected from the information stored in the memory 15 is a CD. -When it is a ROM, the spindle motor 12
Is set to a rotation pause and stands by, and when it is an audio CD, the spindle motor 12 is stopped to stand by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a CD / CD-ROM dual-use changer player, and in particular, by shortening the time until the start of CD-ROM playback, the time from the CD-ROM data output request to the data output in the system is shortened. The present invention relates to a CD / CD-ROM combined changer player.

[0002]

[Prior art]

 There is a CD player with an auto change function that stores a plurality of audio CDs in a magazine, takes out a desired CD from the magazine and plays it. According to such a CD player with an auto change function, it is possible to continuously play for a long time from the first CD to the last CD, and to select and reproduce a desired CD from a large number of CDs. It is very convenient in a car or 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, the CD-ROM playback device has the same structure as the corresponding part of the audio CD player, and if a circuit part peculiar to the CD-ROM is added to the CD player, the CD-ROM for audio and the CD-ROM will be A dual-purpose machine can be configured. Therefore, recently, a CD / CD-ROM combined changer player has been proposed in which a circuit specific to the CD-ROM is added to the CD changer player.

[0004]

[Problems to be solved by the device]

 In such a combined CD / CD-ROM changer player, when audio CDs and CD-ROMs are mixed in the loaded magazine, the audio is read only after the TOC information of the selected disc is read. I don't know whether it's a CD or a CD-ROM. Therefore, the player's waiting method when the disc is loaded cannot be uniquely determined.

Generally, the system controller sends a data transfer request to the CD-ROM player, and then the system controller that receives the data obtained by reproducing the CD-ROM must transfer the data within a few seconds. Since the controller determines that the CD-ROM has failed to be played back, it is necessary to shorten the time until the CD-ROM is reproduced as much as possible. If they are mixed in the magazine, the waiting method cannot be decided. Therefore, you have to decide which one to use, but if you set the standby method to the audio CD, the above problems will occur, and if you set it to the CD-ROM, the current consumption will increase, and as a result, the player will generate heat. There was a drawback that it did.

In view of the above, the object of the present invention is to shorten the time from the CD-ROM reproduction request from the host computer to the reproduction operation and to shorten the communication time with the host computer. The purpose is to provide a dual-purpose changer player.

[0007]

[Means for Solving the Problems]

 SUMMARY OF THE INVENTION In the present invention, there is provided the above object in a CD / CD-ROM changer system having a reproducing means for selecting and reproducing a predetermined disc from a magazine storing a plurality of audio CDs and CD-ROMs. A discriminating means for discriminating whether each disc is an audio CD or a CD-ROM by reading TOC information of each disc in the magazine, a storage device for storing the discriminated information, and a desired disc Selection instruction means for selecting and, when the desired disc is selected by the selection instruction means, from the information stored in the storage device, the reproduction is performed when the selected disc is a CD-ROM. And a system controller that makes the playback stand by in a rotation pose, and stops the playback section when the audio CD is an audio CD. It is determined.

[0008]

[Action]

The system controller reads the TOC information of each disc in the magazine, and discriminates whether the disc is an audio CD or a CD-ROM, discriminating means, a storage device for storing the discriminated information, and a desired disc. Selection instruction means for selecting and indicating the disc, and when the desired disc is selected by the selection instruction means, the selected disc is a CD-ROM from the information stored in the storage device. When it is an audio CD, the reproduction section is stopped and put in a standby state when the reproduction section is in a rotation pause.

[0009]

【Example】

 The figure is a block diagram of a CD / CD-ROM combined changer player according to the present invention.

1 is a magazine that stores a plurality of audio CDs and CD-ROMs, 2 is a disc change mechanism for taking out a designated CD or CD-ROM from the magazine and setting it in a player, 2a is a disc change mechanism 2. A magazine loading detector for detecting the insertion of a magazine, 3 is a turntable, 4 is an optical pickup, 5 is an RF amplifier, 6 is error detection and correction processing for input data, and various processing is executed. A signal processing unit, 7 is a system controller having a microcomputer configuration including a data read / write process with a memory, 8 is a DA converter for converting digital audio data to analog, 9 is a low pass filter, 10 is a servo controller, and 11 is a pickup mover. Feed motor to let. A spindle motor 12 rotates the disk at a constant linear velocity.

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

Reference numeral 13 is a second error correction circuit that performs a second error correction process on the CD-ROM data that has been subjected to the first error correction process, and 14 is an interface circuit with a host computer 21 described later. The second error correction circuit 13 is provided to ensure high reliability in the CD-ROM with a bit error rate of 10 −12, and corrects an error that cannot be completely corrected by the first error correction processing. . Reference numeral 22 denotes a control unit for operating the changer player, which is composed of 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 is a flow chart for explaining the operation of the CD / CD-ROM combined changer system according to the present invention. The operation of the present invention will be described below based on this flowchart.

When a magazine 1 in which audio CDs and CD-ROMs are mixed is loaded in a CD / CD-ROM player, a magazine loading detection signal is input to the system controller 7 from the magazine loading detector 2a (step 101).

When the system controller 7 detects the magazine loading detection signal, it loads the audio CDs or CD-ROMs housed in the magazine 1 into the disc change mechanism 2 one by one. When the first disc is loaded, the system controller 7 outputs a signal requesting the servo controller 10 to perform processing for reading the TOC information of the loaded disc 3. The servo controller 10 which receives the signal controls the spindle 12 and the optical pickup 4 to perform a series of processes for starting 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 disc, and stores the first disc in the magazine 1. The above operation is performed for all the disks in the magazine 1 (steps 102 and 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 instructed disk from the memory and determines whether it is an audio CD or a CD-ROM. (Step 105).

If the disc identified is a CD-ROM, the system controller 7 loads the disc instructed by the disc change mechanism 2 (step 106) and rotates the spindle motor 12 with respect to the servo controller 10. Then, the focus servo, tracking servo, and spindle servo are activated, the optical pickup is searched for from the TOC information of the disc stored in the memory 15 to the head address of the data area of the disc, and the spindle motor 12 is rotated. 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, it is possible to immediately start the search toward the instructed position and reproduce.

In step 105, when the disc determined is the audio CD, the system controller 7 loads the disc instructed by the disc change mechanism 2 and searches the optical pickup 4 in the same manner as described above. , The spindle motor 12 is stopped from rotating until it is instructed to reproduce by the host computer, and it stands by.

As described above, when the CD-ROM is selected, the TOC information in the memory 15 is used for the search, and the disc is kept rotating to shorten the time until the reproduction. In the above embodiment, the TOC reading is performed when the magazine is inserted, but the reading instruction may be given by operating the disc discrimination designation key.

[0020]

[Effect of device]

 According to the present invention, a CD / CD-ROM combined changer system equipped with a reproducing means for selecting and reproducing a predetermined disc from a magazine containing a plurality of audio CDs and a CD-ROM is provided. -It is possible to shorten the time from the data output request of the ROM to the data output, and the time to start the CD-ROM reproduction.

[Brief description of 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 the CD exchange control and performance control processing of FIG.

[Explanation of symbols]

 1 Magazine 2 Disc Change Mechanism 3 Disc 4 Optical Pickup 5 Signal Processor 7 System Controller 10 Servo Controller 11 Actuator 12 Spindle Motor 13 Second Error Correction Circuit 15 Memory 21 Host Computer 22 Control Unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location G11B 19/02 J 7525-5D

Claims (1)

[Scope of utility model registration request] 1. A plurality of audio CDs and CD-ROMs.
In a CD / CD-ROM dual-use changer system equipped with a reproducing means for selecting and reproducing a predetermined disc from a magazine storing therein, TOC information of each disc in the magazine is read, and the disc is used for audio. CD or CD-ROM
Discriminating means for discriminating whether or not it is, a storage device for storing the discriminated information, a selection instructing means for instructing to select a desired disc, and a desired disc selected by the selection instructing means, Based on the information stored in the storage device, when the selected disc is a CD-ROM, the playback unit is placed in a standby state in a rotational pause, and when it is an audio CD, the playback unit is stopped and placed in a standby state. A CD / CD-ROM combined changer system characterized by comprising a system controller.