JPH08185690A - Changer type disk reproducing device - Google Patents

Abstract

PURPOSE: To provide a changer type disk reproducing device capable of implementing a quick reproduction. CONSTITUTION: A memory 5 temporarily storing additional information each corresponding to respective disks housed in a disk housing part is provided in this device. When prescribed instructions such as reproducing instruction are not executed for a time equal to or longer than a predetermined time, the additional information housed in the disk housing part and in a disk having a memory 5 not stored with the additional information are read in to be stored in the memory 5. Moreover, when a prescribed instruction is issued during the read-in operation of the additional information of the disk, the read-in operation of the additional information is interrupted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a changer type disc reproducing apparatus, and more particularly to a changer type disc reproducing apparatus for performing a quick reproduction.

[0002]

2. Description of the Related Art A plurality of disks can be stored in advance,
When a disc specified by the user is taken out from the stored discs and a plurality of discs are continuously reproduced, the TOC (Table of of the discs) of the disc is preliminarily recorded when the disc is reproduced.
Content) information needs to be read in advance. The TOC information of the disc is described by the Q channel of the subcode signal in the lead-in area. On the other hand, in the program area, absolute time information on the disc, track number (No.) information, and elapsed time information within the track number are described by Q channel data of the subcode signal.

In the conventional changer type disc reproducing apparatus of this type, the TOCs of all the contained discs are read at once when the power is turned on or when the tray is opened and closed. That is, as shown in the flowchart of FIG. 6, after the operation is started, first, the presence or absence of the disc at the disc storage position (tray) in the disc storage section is detected (step S31), and the TOC data of all the stored discs is detected. Is read, transferred to the memory and stored (step S32). Next, it is determined whether or not the reproduction of the disc is instructed (step S33). When the reproduction is instructed, the TOC stored in the memory is stored in the tray No. for which the reproduction is instructed. The reproduction is performed according to the data (step S34), the reproduction is ended (step S35), and then the process returns to the step S33 to wait for the reproduction instruction of the next disc.

Further, in another conventional changer type disc reproducing apparatus, when a user designates a disc to be reproduced by an operation key or the like, the disc is moved to a reproducing position to read TOC data, and then a reproducing operation is performed. Had started. For example, as shown in FIG. 7, after the operation is started, the presence or absence of the disc is detected (step S41), and it is determined whether or not the disc reproduction is instructed (step S4).
2) When the disc reproduction is instructed, the TOC data of the instructed disc is read from the subcode in the lead-in area, transferred to the memory and stored therein (step S43), and then the reproduction is started (step S44). The reproduction is finished (step S45). After that, the process returns to the step S42 and waits for a reproduction instruction of the next disc.

[0005]

As described above,
In the conventional changer type disc reproducing apparatus, after waiting for the reproducing instruction from the user, the disc is moved to the reproducing position to read the TOC data to start the reproducing, or when the power is turned on or the tray is opened / closed The TOC of the disc was read at once and played.

Therefore, if the TOC data of the disc to be reproduced is not stored in the memory, the TOC data of the disc must be read, and the reproduction operation is started after the user performs an operation for instructing reproduction. However, there are some things that cannot be operated until the TOC data of all the discs are read after the power is turned on.

SUMMARY OF THE INVENTION An object of the present invention is to provide a changer type disc reproducing apparatus which enables quick reproduction.

[0008]

In order to solve the above-mentioned problems, a changer-type disk reproducing apparatus according to the present invention comprises:
In a changer type disc reproducing apparatus for automatically exchanging and reproducing a disc instructed to be reproduced from discs accommodated in the disc storing portion, additional information is temporarily stored for each disc that can be stored in the disc storing portion. Memory means, detection means for detecting that a disc is stored in the disc storage position of the disc storage part, and the predetermined detection instruction when the predetermined reproduction instruction has not been issued for a predetermined time or more. Control means for reading the additional information of the disk, which is stored in the disk storage portion but does not store the additional information in the memory means, and stores the additional information in the memory means;
It is comprised including.

Here, the reading operation of the additional information can be interrupted when the predetermined instruction is given during the reading operation of the additional information of one disc.

[0010]

According to the present invention, a memory for temporarily storing additional information for each disc that can be stored in the disc storage portion is provided, and when the predetermined instruction is not given for a predetermined time or longer, the disc storage portion is stored. The additional information about the disk that is stored but the additional information is not stored in the memory is read and stored in the memory.
Further, when a predetermined instruction is given during the operation of reading the additional information of the disc, the operation of reading the additional information is interrupted.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a configuration block diagram showing an embodiment of a changer type disc reproducing apparatus according to the present invention.

The changer mechanism section 1 is provided with a disc storage mechanism, a change mechanism, a reproduction mechanism and the like. For example, as shown in FIG. 2, five trays (tray numbers) are provided at the apex positions of a regular pentagon on the turntable T. .P1 to P5)
Discs can be stored on each tray, and a changer mechanism for rotating and clamping the disc to be reproduced by rotating the turntable T to the disc reproduction position S and a disc for rotating the clamped disc. It is composed of a motor and a pickup feed mechanism for irradiating a disc with laser light and moving an optical pickup for reading data recorded on the disc in a radial direction of the disc by changing a diffraction pattern of return light.

The servo circuit 2 is provided with a focus error signal from the optical pickup in the changer mechanism section 1.
An error for receiving the tracking error signal and the laser power monitor signal, performing the focus servo of the optical pickup, the tracking servo, the laser emission power control, and the servo control of the pickup feeding mechanism, and driving the disk motor from the EFM demodulation correction circuit 3. The disk motor servo control is performed in response to the signal, and the changer mechanism is controlled in response to the signal from the system controller 4.

The EFM demodulation / correction circuit 3 converts the signal read by the optical pickup into a digital binary signal,
The Q channel of the subcode obtained by EFM demodulation and the error detection and correction processing of the demodulated data is output to the system controller 4, and the data other than the subcode is output to the D / A converter 6. During EFM demodulation, the data read clock is compared with the reference clock to generate the error signal for controlling the rotation of the disk and send it to the servo circuit 2.

The system controller 4 receives the detection signal for controlling the changer mechanism operation from the changer mechanism section 1 and sends a signal for controlling the changer mechanism to the servo circuit 2 so that the servo circuit 2 and the EF function.
For M demodulation correction circuit 3, play, pause, stop,
A signal for executing a search or the like is transmitted. The system controller 4 also receives from the EFM demodulation correction circuit 3
It receives the sub-channel Q channel data recorded on the disc, decodes the TOC data, and generates the CD-DA track time display data.

Disk additional information necessary for disk reproduction is stored in the memory 5 via the system controller 4,
It is also read from the memory 5. EFM demodulation correction circuit 3
The audio reproduction data output from is converted into an analog signal by the D / A converter 6, the unnecessary band component signal is removed by the low-pass filter (LPF) 7, and the signal is sent to the audio output terminal 8.

The key matrix 9 has various kinds of keys for instructing the operation of this apparatus, and, for example, a disc to be reproduced and a reproduction instruction are given. The display 10 displays information such as the operating state of the apparatus and user instructions.

The disc presence / absence detection circuit 11 illuminates the disc surface with a light emitting diode or the like, detects the presence or absence of the disc by detecting the returned light with a phototransistor or the like, and sends the information to the system controller 4. .

The operation of this embodiment will be described below. The presence / absence of a disc in each tray of the changer mechanism unit 1 is determined by the disc presence / absence detection circuit 11. The system controller 4 displays the tray number in the memory 5. By setting a disc storage flag corresponding to the tray No. Control to store.

When reproduction is instructed by the key matrix 9, the system controller 4 causes the T
If the OC data already exists in the memory 5, the reproducing operation is executed according to the TOC data stored in the memory 5. If it does not exist in the memory 5, an optical pickup is searched for in the TOC area of the disc via the servo circuit 2 and the EFM demodulation correction circuit 3 and recorded in the Q channel of the subcode in the lead-in area. The TOC data is read out, and the tray No. of the memory 5 is read. After the TOC data is written in the area allocated for each, reproduction is started.

Then, when the system is stopped, the system controller 4 sets a timer for a fixed time. If the user does not perform any operation from the key matrix 9 while the timer is counting, if there is a disc in which the TOC has not been read among the stored discs at the time when the timer counting ends,
The changer mechanism unit 1 replaces the TOC data with a disk that has not been read, and reads the TOC data and stores it in the memory 5. This operation is sequentially repeated to read the TOC data of all the disks stored.

If the user performs any operation (playback instruction, etc.) on the key matrix 9 while the timer is counting or reading the TOC data, the timer or TO
The reading of C data is stopped, the timer is cleared, and the operation immediately starts.

The embodiment of the present invention has the configuration shown in FIG. 1, and the system controller 4 uses the TOC as shown below.
Perform processing related to data.

FIG. 3 and FIG. 4 show flow charts which are operation processing procedures of this embodiment. After the operation is started, the presence / absence of a disc in each tray of the changer mechanism unit 1 is determined by the disc presence / absence detection circuit 11 (step S1). When it is determined that there is no disc, it is determined whether or not the tray is loaded (step S2). ), When the tray is loaded, the process proceeds to step S1 (step S2). On the other hand, if it is determined in step S1 that there is a disc, the tray number (No.) in which the disc is stored is set by setting a disc storage flag corresponding to the tray determined to have the disc in the memory 5. It is stored (step S3).

FIG. 5A shows an example of bit allocation to the memory 5. For 8 bits consisting of b0 to b7, a binary disc of tray No. indicated by numeral in the figure is used. A storage flag (H: disc present, L: disc not present) is stored. FIG. 5B shows an example in which similar TOC storage flags (H: TOC stored, L: TOC stored) are stored.

Next, it is determined whether or not the tray has been opened (step S4). If it has not been opened, the process proceeds to step S6, which will be described later, and if it has been opened, the disk storage flag and TOC in the memory 5 will be described. All the memory flags are cleared (step S5), and the process returns to the start.

Now, the reproduction is instructed by the key matrix 9. In step S6, it is judged whether or not the reproduction is instructed (step S6). If the reproduction is not instructed, the timer count is started. (Step S
7) It is determined whether or not reproduction is instructed (step S
8). Here, if reproduction is instructed, the timer is reset (step S9), and step S described later is performed.
The process shifts to the process of 12.

In step S8, if reproduction is not instructed, it is judged whether or not the timer has timed up (step S10). If not, the process returns to step S8 and timed up. For example, it is determined whether or not there is a disk that does not store TOC data in the memory 5 (step S11). In step S11, if there is no disk that does not store TOC data, the process returns to step S4, and if there is, the process proceeds to step S21 of FIG. 4 described later.

Next, in step S12, it is judged whether or not TOC data of the disc instructed to be reproduced is stored in the memory 5 (step S12). If so, the reproducing operation is started ( If not stored in step S15), the Q channel of the subcode in the lead-in area of the disc instructed to be reproduced is read, and the TO
The C data is sequentially transferred to and stored in the memory 5 (step S
13). After all the TOC data is transferred and stored, the TOC storage flag corresponding to the tray No. is set (step S14), the reproducing operation is started (step S15), and the reproducing operation is completed (step S16), step S4.
Return to processing.

If it is determined in step S11 that there is a disc in which TOC data is not stored, as shown in FIG. 4, the tray number of the disc in which the TOC data is not stored is smaller. No.
The tray is moved to the reproduction position (step S21), and the reading of the Q channel of the subcode in the lead-in area is started. Further, the read TOC data is sequentially transferred to the memory 5 and starts to be stored (step S22). T
Since it takes time to read OC data, for example,
Every time one frame of TOC data is read, the process proceeds to the next step. In the next step, it is determined whether or not there is a reproduction instruction (step S23). If there is a reproduction instruction, the process proceeds to step S12 of FIG. 3. If there is no reproduction instruction, it is determined whether all TOC data has been stored (step S24). Returning to the processing of step S22, the processing is continued. If all are stored, after setting the TOC storage flag (step S
25), the process returns to step S11 of FIG.
It is determined whether or not there is a disk in which C data is not stored (step S11).

In the above-described embodiment, the reproduction instruction is described as an example of the predetermined instruction, but the same applies to other instructions such as disc select, skip, search, and eject. Further, in the above-described embodiment, the changer mechanism is a rotary type of five disks,
Needless to say, the present invention can be applied to the case of a magazine type, and the present invention can be applied to a disc reproducing apparatus of a category other than the CD-DA.
Needless to say, it is possible to use a high-speed playback function such as quadruple speed.

[0032]

As described above, according to the changer type disc reproducing apparatus of the present invention, the process of reading TOC data for each disc reproducing instruction can be omitted, and the operation can be accepted immediately after the power is turned on or the tray is closed. Therefore, it is possible to quickly reproduce the disc.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of a changer type disc reproducing apparatus according to the present invention.

FIG. 2 is a diagram showing an example of a disc storage mechanism of the changer mechanism unit 1 in FIG.

FIG. 3 is a flowchart showing an operation processing procedure according to the embodiment of the present invention.

FIG. 4 is a flowchart showing an operation processing procedure according to the embodiment of the present invention.

FIG. 5 is a diagram showing an example of storage in a memory according to the embodiment of the present invention.

FIG. 6 is a flowchart showing an operation procedure of a conventional changer type disc reproducing apparatus.

FIG. 7 is a flowchart showing an operation procedure of another conventional changer type disc reproducing apparatus.

[Explanation of symbols]

 1 Changer mechanism part 2 Servo circuit 3 EFM demodulation correction circuit 4 System controller 5 Memory 6 D / A converter 7 Low-pass filter (LPF) 8 Audio output terminal 9 Key matrix 10 Display 11 Disc presence / absence detection circuit

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 21, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

FIG.

[Fig. 2]

[Figure 5]

[Figure 6]

[Figure 3]

[Figure 4]

[Figure 7]

Claims (2)

[Claims] 1. A changer type disc reproducing apparatus for automatically exchanging and reproducing a disc instructed to be reproduced from discs accommodated in the disc accommodating portion, wherein each disc compatible with the disc accommodable in the disc accommodating portion. Memory means for temporarily storing additional information; detection means for detecting that a disc is stored in the disc storage position of the disc storage portion; and, when a predetermined instruction is not given for a predetermined time or more, Control means for reading the additional information of a disk which is stored in the disk storage portion by the detecting means but does not store the additional information in the memory means and stores the additional information in the memory means. Changer type disc playback device characterized by. 2. The changer type disc reproducing apparatus according to claim 1, wherein when the predetermined instruction is given during the operation of reading the additional information of one disc, the operation of reading the additional information is interrupted.