JPH0752553B2 - Recording medium playback device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a recording medium reproducing apparatus.

BACKGROUND ART In a recording disk such as a digital audio disc, the recording level is not always constant and may vary depending on the manufacturer. However, in the conventional disc reproducing apparatus for reproducing the recorded information of the recording disc, since the reproducing characteristic such as the volume adjustment is set by the user's manual operation, the reproducing characteristic is changed every time the disc is replaced. There is a problem that the operability is poor because the setting needs to be performed manually.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a recording medium reproducing apparatus that can improve operability.

A recording medium reproducing apparatus of the present invention is a recording medium reproducing apparatus for reproducing recorded information on a recording medium, and a reading unit for reading recorded information on a recording medium and predetermined information of the recorded information read by the reading unit. Identifying means for identifying the recording medium by means of, a manual adjusting means for adjusting the reproducing characteristic of the recording medium reproducing device according to an operation, and a storing means for storing the reproducing characteristic adjusted by the manual adjusting means as reproducing characteristic data. It is characterized by further comprising: automatic reproduction means for reading the reproduction characteristic data corresponding to the identification result of the identification means from the storage means, and adjusting the reproduction characteristic of the recording medium reproducing apparatus according to the read reproduction characteristic data.

Examples Hereinafter, examples of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 is a magazine for storing N (N is a natural number of 2 or more) disks arranged in order at a predetermined pitch. The magazine 1 is provided with N trays for carrying discs so as to be able to project and be stored in the magazine body. The magazine 1 is removably mounted on a predetermined mounting portion. One of the N disks D _{1 to DN} , which are respectively stored on N trays serving as a plurality of disk storage positions provided in this magazine 1, is rotated by the disk take-out and transport mechanism 2 to rotate the spindle shaft of the spindle motor 3. It is conveyed and clamped on the disk-carrying surface of the turntable 4 fixed to the. The disc take-out and transport mechanism 2 includes a protrusion member that protrudes the tray of the magazine 1 to move the disc onto the disc-carrying surface of the turntable 4, and when the disc moves onto the disc-carrying face of the turntable 4 by the protrusion member. A clamping mechanism that clamps the disc,
It has a moving plate that changes the relative position of the projecting member with respect to the magazine 1 in the tray arrangement direction, and a sensor that detects the position of the moving plate, the operation of the clamp mechanism, and the like. By moving the moving plate in the disc take-out and transport mechanism 2, the position of the projecting member is changed so that the disc can be selected. The configurations of the magazine 1 and the disc take-out and transport mechanism 2 are described in detail in Japanese Patent Application No. 60-153651.

The recorded information of the disc Dn, which is taken out from the magazine 1 by the disc take-out and transport mechanism 2 and clamped on the disc carrying surface of the turntable 4, is read by the optical pickup 6. The pickup 6 includes a laser diode, an objective lens, a focus actuator, a tracking actuator, a photo detector, and the like. The output of the pickup 6 is supplied to each of the focus servo circuit 7, the tracking servo circuit 8, and the reproduction clock generation circuit 9 including the RF amplifier.

In the focus servo circuit 7, a focus error signal is generated by, for example, the astigmatism method, and the focus actuator in the pickup 6 is driven according to this error signal. As a result, the laser light emitted from the laser diode and passing through the objective lens is converged on the recording surface of the disc Dn to form an information detection light spot. In the tracking servo circuit 8, a tracking error signal is generated by, for example, the push-pull method, and this error signal is sent to the tracking actuator in the pickup 6 and the carriage servo circuit 10. The output of the carriage servo circuit 10 is supplied to a motor Ma that drives a carriage (not shown) carrying the pickup 6 so that the pickup 6 is sent in the radial direction of the disk Dn.

A reproduction clock signal for demodulation is generated in the reproduction clock generation circuit 9 and supplied to the spindle servo circuit 11. The spindle servo circuit 11 generates a drive signal according to the phase difference between the reproduction clock and the reference clock from the clock generation circuit 12, drives the spindle motor 3, and controls the disk Dn and the track linear velocity to be constant. To be done. The output of the RF amplifier in the reproduction clock generation circuit 9 is supplied to the EFM demodulation circuit 13 including the frame synchronization circuit together with the reproduction clock. The demodulation output of the EFM demodulation circuit 13 is the deinterleave of the demodulation data signal, error detection,
It is processed by the data processing circuit 14 which performs correction, correction and the like.
Thereafter, the demodulated output is temporarily stored in the data memory 15, read out from the clock generation circuit 12 by a clock signal, and converted into an analog signal by the D / A (digital / analog) converter 16. This analog signal is output as a left and right audio signal via an LPF (low pass filter) 17 and an amplifier 18. It should be noted that the amplifier 18 is configured so that the frequency characteristics are changed by the control data supplied thereto.

On the other hand, the control signal in the data from the EFM demodulation circuit 13 is supplied to the system controller 20, and during the song, between songs,
Various information such as music number, playing time, and disc model number can be read. This system controller 20
Is formed of one or a plurality of microcomputers including a processor, a ROM (read only memory), a RAM (random access memory), an interface circuit, a timer and the like. In this system controller 20, the processor is pre-stored in the ROM and operates according to the program based on the flowchart of FIG. 2, and various detection signals from the disk ejecting / transporting mechanism 2, key input data from the operating section 21, a random number generating circuit 23. Carriage servo circuit 10, spindle servo circuit that processed the output data of
11, supplies various commands and data to the amplifier 18, the display 22, and the drive circuits 22 and 25. In the random number generation circuit 23, for example, m (m is a natural number) in which the count value sequentially changes in an extremely short cycle
The output of the advance counter is latched in response to a data output command and then output. Also the drive circuit
Reference numerals 24 and 25 are configured to supply a drive current according to a command to the motors Mb and Mc that drive the moving plate and the projecting member of the disc take-out and transport mechanism 2, respectively.
Incidentally, 26 stores the information from the system controller 20.
RAM.

Next, the operation of the processor in the system controller 20 will be described with reference to the flowcharts of FIGS.

A disc output transport mechanism 2 outputs a sensor output notifying that one of the discs D _{1 to} D _N stored in the magazine 1 is transported and clamped on the turntable 4 during execution of the main routine or the like. Once the processor is stored in a predetermined address M ₁ in RAM26 read the disc identification information such as catalog number recorded on the disk Dn that is clamped on the turntable 4 and proceeds to step S1. Next, the processor moves to step S2 and reproduces the storage information of the disc Dn by comparing the disc identification information stored in the address M ₁ of the RAM 26 with the disc identification information stored in the identification information storage area. Determine if there is anything.

When it is determined in step S2 that the recorded information of the disc Dn has been reproduced, the processor proceeds to step S3 and determines the address of the information storing the disc Dn from the disc identification information of the disc Dn. Calculate the address value. Next, the processor proceeds to step S4 and reads the volume data and the frequency characteristic data stored in the reproduction characteristic data storage address corresponding to the disc identification information, that is, the reproduction characteristic data storage address corresponding to the address value calculated in step S3. . Next, the processor proceeds to step S5, sends the read data to the amplifier 18, controls the gain and frequency characteristics in the amplifier 18, and restarts the execution of the routine that was executed immediately before shifting to step S1.

When it is determined in step S2 that the recorded information of the disc Dn has not been reproduced, the processor moves to step S6 and stores the disc identification information of the disc Dn in the identification information storage area in the RAM 26, Resume execution of the routine that was being executed immediately before shifting to S1.

After that, during execution of the disc playback operation such as the main routine, the processor is
In S10, it is determined whether the key operation of the operation unit 21 is performed. If it is determined in step S10 that no key operation has been performed, the processor proceeds to step S10.
Resume execution of the routine that was being executed immediately before shifting to. When it is determined in step S10 that the key operation has been performed, the processor proceeds to step S11 and determines whether or not the volume key in the operation unit 21 has been operated.

When it is determined in step S11 that the volume key has been operated, the processor proceeds to step S12 and determines whether or not a volume up command has been issued by the volume key. When it is determined in step S12 that the volume up command has been issued, the processor moves to step S13 and is stored in the reproduction characteristic data storage address in RAM 26 corresponding to the disc identification information stored in address M ₁ in RAM 26. Add 1 to the existing volume data. Next, the processor proceeds to step S14 and sends the volume data and the frequency characteristic data stored in the reproduction characteristic data storage address in the RAM 26 corresponding to the disc identification information stored in the address M ₁ in the RAM 26 to the amplifier 18. , The execution of the routine that was being executed immediately before shifting to step S10 is restarted. Step
If it is determined in S12 that the volume up command has not been issued, the processor moves to step S15 and RAM
1 is subtracted from the volume data stored in the reproduction characteristic data storage address in the RAM 26 corresponding to the disc identification information stored in the address M ₁ in 26, and the step
Move to S14.

When it is determined in step S11 that the volume key has not been operated, the processor proceeds to step S16 and determines whether the graphic equalizer key has been operated. When it is determined in step S16 that the graphic equalizer key has been operated, the processor proceeds to step S17 and is stored in the reproduction characteristic data storage address in RAM 26 corresponding to the disc identification information stored in address M ₁ in RAM 26. The frequency characteristic data being updated is updated, and the process proceeds to step S14. When it is determined in step S16 that the graphic equalizer key has not been operated, the processor proceeds to step S18 and determines whether or not the eject key has been operated.

When it is determined in step S18 that the eject key has been operated, the processor proceeds to step S19 and issues a command to the drive circuits 24 and 25 so that the disc Dn is released from the clamp and is conveyed to the storage position in the magazine 1. Then, the routine is executed, and the execution of the routine that was being executed immediately before shifting to step S10 is restarted. When it is determined in step S18 that the eject key has not been operated, the processor immediately resumes the execution of the routine that was being executed immediately before shifting to step S10.

By the above operation, when the key operation of the operation unit 21 is performed and the volume adjustment or the like is performed, the adjusted volume data or the like is clamped on the disc identification information stored in the address M ₁ of the RAM 26, that is, the turntable 4. The data is stored in the reproduction characteristic data storage address of the RAM 26 corresponding to the disc identification information of the disc. Therefore, if the stored information on the disc after replacement has been played before that when the disc is replaced, data corresponding to the volume adjustment etc. at the time of playing back the stored information on the disc after replacement will be the disc identification information. It is stored in the reproduction characteristic data storage address of the corresponding RAM 26, and the reproduction characteristic such as volume adjustment is set by the data stored in the reproduction characteristic data storage address of the RAM 26 corresponding to this disc identification information. Thus, the reproduction characteristic that matches the taste is automatically obtained, and it is not necessary to perform the manual operation for adjusting the reproduction characteristic, and the operability is improved.

As described above in detail, in the storage medium reproducing apparatus of the present invention, the reproduction characteristic of the recording medium reproducing apparatus is adjusted by the manual adjusting means according to the operation, and the adjusted reproduction characteristic is stored as the reproduction characteristic data. When the recording medium is identified by predetermined information stored in the recording medium and read from the recording medium, the reproduction characteristic data corresponding to the identification result is read from the recording means and the recording medium is read according to the read characteristic data. Since the playback characteristics of the playback device are adjusted,
When the disc is exchanged, if the recorded information on the disc after the exchange has been reproduced before, the reproduction value that matches the taste will be obtained by the adjustment value recorded at the storage position corresponding to the disc identification information after the exchange. It will be automatically obtained and the operability will be good.

[Brief description of drawings]

FIG. 1 is a block diagram showing a disc player as a recording medium reproducing device of the present invention, FIG. 2 is a flowchart showing an operation of the device of FIG. 1 immediately after loading a disc, and FIG. 3 is a diagram of the device of FIG. It is a flow chart which shows operation when a key operation is performed.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Kiyoura 25 Nishi-machi, Yamada, Kawagoe-shi, Saitama 1 Pioneer Co., Ltd. Kawagoe factory (72) Inventor Issei Nakamura 25 Nishi-machi, Yamada, Kawagoe, Saitama Prefecture Address 1 Pioneer Co., Ltd. Kawagoe Factory (56) Reference JP 61-250870 (JP, A) JP 60-55582 (JP, A)

Claims (1)

[Claims] 1. A recording medium reproducing apparatus for reproducing recorded information on a recording medium, comprising: reading means for reading recorded information on the recording medium; and predetermined information of the recorded information read by the reading means. Identification means for identifying the recording medium, manual adjustment means for adjusting the reproduction characteristics of the recording medium reproduction apparatus according to operation, and storage means for storing the reproduction characteristics adjusted by the manual adjustment means as reproduction characteristic data. And automatic adjustment means for reading the reproduction characteristic data corresponding to the identification result of the identification means from the storage means and adjusting the reproduction characteristic of the recording medium reproducing apparatus according to the read reproduction characteristic data. Recording medium reproducing device.