JPH087452A - Disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To change the feasibleness/unfeasibleness of recording without taking out a housed recordable disk in an MD changer capable of plurally housing MD disks. CONSTITUTION:Whether the MD disk housed in an MD disk stocker 19 is a recordable disk which can be recorded and reproduced or a prerecorded disk used only for reproducing is detected by a disk kind hole detection switch 17 and also whether the recordable disk can be recorded or not is detected by a safety hole detection switch 16, then the detected result is stored in a memory. Thus, the state of the recordable disk such as the feasibleness/ unfeasibleness of recording is changed by key operation without taking out the disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording / reproducing apparatus for reproducing information signals such as audio signals recorded on a disc-shaped recording medium such as a magneto-optical disc.

[0002]

2. Description of the Related Art As an apparatus as described above, there is an MD (mini disk) system. The MD system records an audio signal on a rewritable magneto-optical disk by a digital method, and the digitized audio signal is an ATRAC (Adaptive TR).
Data is compressed by a high-efficiency encoding process called "amorphous acoustic coding", and magneto-optically recorded on the magneto-optical disk.

[0003]

By the way, in a CD player, a so-called CD changer which allows a plurality of discs to be mounted and selectively reproduces the plurality of mounted discs has been attracting attention. Various devices have been developed and sold in the CD changer, from those having a capacity of about 3 disks to those capable of accommodating up to 100 disks.

In recent years, the above-mentioned MD system has been attracting attention as a disc device capable of recording data. By using this MD system, a plurality of MD discs can be mounted to selectively record and reproduce data as in a CD changer. So to speak, the development and examination of MD changers are underway.

However, there are two types of MD discs used in the MD system: a recordable disc composed of a recordable and reproducible magneto-optical disc and a prerecorded disc dedicated to reproduction. Therefore, when many discs are stored in the MD changer, it is necessary to detect whether the stored discs are pre-recordable discs that cannot be recorded or recordable discs that are recordable. Must be mounted on an MD recording / reproducing unit for recording / reproducing, and requires time for transferring the disc from the storage part to the MD recording / reproducing unit and time required for disc detection by the MD recording / reproducing unit. There is a problem that the disk cannot be checked quickly.

FIG. 5 shows a cartridge of the recordable disc. The cartridge case 60 has a shutter 64, which is configured to slide in the direction of arrow A to expose the magneto-optical disk 30 inside the cartridge case 60 through a window (not shown) under the shutter 64. There is. In addition, the cartridge case 6
0 is provided with a disc type hole 63 and an erroneous erasure prevention hole 62, which detect whether the disc is a pre-recordable disc for reproduction or a recordable / reproducible recordable disc, and further recording on the recordable disc. Whether or not recording is possible is detected. That is, 1) when the disc type hole 63 is open: a recordable disc 2) when there is no disc type hole 63: a prerecorded disc, and in the recordable disc, the slide member 65 is slid in the direction of arrow B, 1) When the erroneous erasure prevention hole 62 is closed: recording is possible 2) When the erroneous erasure prevention hole 62 is open: recording is not possible

Therefore, after recording on an arbitrary recordable disc, if it is desired to set the disc in a non-recordable state in order to protect the recorded contents, the disc is first taken out of the apparatus and installed in the cartridge case 60. The slide member 65 is operated to open the erroneous erasure prevention hole 62, and then the disk must be stored again in the device, which causes a problem that the operation is troublesome and takes time.

On the contrary, when the user records on a recordable disc, if the erroneous erasure prevention hole 62 provided in the cartridge case 60 of the disc is opened, the disc cannot be recorded and the disc cannot be recorded. In order to make it recordable, the disc is taken out and the cartridge case 6
Since the slide member 65 provided at 0 must be operated to close the erroneous erasure prevention hole 62 and then the disc must be inserted again, there is a problem that the operation is troublesome and time consuming.

[0009]

In order to solve the above-mentioned problems, the present invention has a disc storage portion for storing a plurality of discs, and a disc for selectively recording and reproducing the discs stored in the disc storage portion. In the recording / reproducing apparatus, a disc type detecting means for detecting whether the disc is a read-only disc or a recordable / reproducible disc, and a disc recordable / recordable disc for recording / reproducing a recordable / reproducible disc. A non-detection means, a memory means for storing information from the disc type detection means and the disc recordable / non-recordable detection means, and at least for a disc judged to be recordable by the disc recordable / non-recordable detection means Disk recording / reproducing apparatus provided with disk recording enable / disable changing means for changing the recording enable / disable setting Is intended to St. provide.

[0010]

With the above arrangement, the disc recordable / non-recordable changing means can change the recordable / non-recordable setting for at least the disc set to recordable.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

First, FIG. 1 shows the structure of a disk storing mechanism portion of a disk recording / reproducing apparatus of the present invention. As shown in the figure, the apparatus is a rotary donut-shaped MD disc stocker 19 capable of storing 16 MD discs,
MD recording / reproducing unit 2 for recording / reproducing an MD disc arranged in the central portion of the MD disc stocker 19.
9 is equipped.

Reference numeral 20 is an MD disk insertion slot for inserting an MD disk, 21 is a first drawing roller for drawing the MD disk inserted from the MD disk insertion opening 20 into the MD disk stocker 19, 2
2 is the MD stored in the MD disc stocker 19
A second pull-in roller for pulling the disc into the MD recording / reproducing unit 29, and an MD 23 for detecting that the MD disc has been inserted into the disc insertion opening 20.
A disc insertion sensor, 24 is a first pull-in roller drive motor for driving the first pull-in roller 21, and 25
Is a second pull-in roller drive motor for driving the second pull-in roller 22, 26 is an MD disc stocker rotating roller for rotating the MD disc stocker 19, and 27 is an MD disc stocker rotating roller for driving the MD disc stocker rotating roller 26. A drive motor, 16 is an erasure prevention hole detection switch, and 17 is a disk type hole detection switch.

In the MD recording / reproducing unit 29 shown in the same figure, 37 is a spindle motor for rotating the MD disk, 38 is an optical pickup, and 39 is a feed motor for driving the optical pickup 38.

FIG. 2 is a circuit block diagram showing the structure of the recording / reproducing system of the device of the present invention shown in FIG. In the figure, 36 is an analog signal input terminal to which an analog information signal such as a voice signal is input, 35 is an A / D conversion circuit for converting the information signal input from the analog signal input terminal 36 into a digital signal, and 34 is The A / D
ATR for compressing the digital information signal output from the conversion circuit 35 and converting it into a highly efficient encoded digital signal
An AC processing circuit 33 is a digital signal processing circuit for interleaving the digital signal output from the ATRAC processing circuit 34, adding an error correction code, and converting it to a digital signal with a subcode signal added, and 32 is a head drive circuit. The output signal from the digital signal processing circuit 33 is converted by the recording magnetic head 31 into a signal for recording on the magneto-optical disk 30.

Reference numeral 38 is an optical pickup for reading pit data from the magneto-optical disk 30 and converting it into a digital signal, 40 is a digital signal processing circuit for performing processing such as error correction on the signal read by the optical pickup 38, 41 Is an ATRA that expands the signal processed by the digital signal processing circuit 40 and restores the original digital signal.
C processing circuit, 42 is a D / A conversion circuit for converting a digital signal output from the ATRAC processing circuit into an analog signal, and 43 is an analog signal output terminal for outputting an analog signal output from the D / A conversion circuit 42. . In the case of a pre-recorded disc for reproduction only, the process of signal processing during reproduction is the same as above.

Further, 39 is a feed motor for reciprocally driving the optical pickup 38 between the inner circumference and the outer circumference of the magneto-optical disc 30, and a tracking error signal output from the optical pickup 38 causes a servo control circuit 44 to drive the same. Controlled. 37 is a spindle motor for rotating the magneto-optical disk 30.

Reference numeral 45 is an MD control circuit for controlling the operation of the entire apparatus. The mechanism is switched to each mode of recording / reproducing / fast-forwarding / fast-returning and processing based on an input signal from the key input terminal 49 and processing of subcode data. Then, the digital signal processing circuit 33, the digital signal processing circuit 40, the servo control circuit 44, etc. are controlled. The MD control circuit 45 may be composed of a microcomputer.

Reference numeral 10 is a memory for storing disk information, and 9
Is a display device for displaying the information stored in the memory.

FIG. 3 is a view showing a cross section of the magneto-optical disk 30. In FIG. 3, 50 is a lead-in area where disk information can be reproduced, and 51 is a UTO.
Area where recording information can be recorded and reproduced in area C,
Reference numeral 52 is a program area in which music information can be recorded and reproduced, and 53 is a lead-out area.

Next, the operation of the device of the present invention will be described.

In FIG. 1, when the user tries to insert an MD disc through the MD disc insertion slot 20, M
The D disc insertion sensor 23 detects the MD disc.
As a result, the MD control circuit 45 activates the first pull-in roller drive motor 24 to activate the first pull-in roller 21.
Rotate the MD disc to MD disc stocker 1
9 Move inside.

While the MD disc is moving inside the MD disc stocker 19, the disc type hole detection switch 17 detects the type of the inserted MD disc. The structure of the disc type hole detection switch 17 is, for example, as shown in FIG. 5, and this figure shows a cross section near the disc type hole 63 of the cartridge case 60 of the magneto-optical disc 30. The hole 63 is a depressed hole.

The disk type hole detection switch 17 is
A spherical or cylindrical roller 70 that is movable in the vertical direction (direction of arrow C) with respect to the disc type hole 63 is provided, and the MD control circuit 45 causes the first pull-in roller drive motor 24 by the detection of the MD disc insertion sensor 23. When the MD disk is stored in the MD disk stocker 19, the cartridge case 60 of the MD disk moves while rotating the roller 70.

At the position where the roller 70 is engaged with the disc type hole 63, if the disc type hole 63 is vacant, the roller 70 is lowered and the switch 71 is turned off, while the disc type hole 63 is closed. In that case (there is no disc type hole 63), the roller is raised and the switch portion 71 is turned on. Therefore, depending on the time timing, the rotation angle of the first pull-in roller 21, the MD disc insertion sensor 23, and the like, the MD control circuit 45 causes the state of the disc-type hole detection switch 17 at the timing when the roller 70 is engaged with the disc-type hole 63. By checking, 1) the disc type hole detection switch 17 is OFF:
Recordable disc 2) Disc type hole detection switch 17 is ON: Pre-recorded disc can be detected.

When the MD disk further moves, the erroneous erasure prevention hole detection switch 16 detects the state of the erroneous erasure prevention hole 62 of the disk cartridge 60 of the MD disk in the same manner as the disk type hole detection switch 17. . The erroneous erasure prevention hole detection switch 16 also has the same structure as the disk type hole detection switch 17, and when the erroneous erasure prevention hole 62 is released, the switch roller is lowered to detect the erroneous erasure prevention hole detection switch 16. When the erroneous erasure prevention hole 62 is closed, the switch roller is raised and the erroneous erasure prevention hole detection switch 16 is turned on.
Turns on. Therefore, the MD control circuit 45 checks the state of the erroneous erasure prevention hole detection switch 16, and 1) the erasure prevention hole detection switch 16 is turned on: a recordable recordable disc 2) the erasure prevention hole detection switch 16 is OFF: A recordable disc that cannot be recorded can be detected. And MD disc is MD
It is stored inside the disk stocker 19 (position B).

The disc information obtained as described above is stored in the memory 10 connected to the MD control circuit 45 and further displayed on the display device 9 as required.

The MD discs stored in the MD disc stocker 19 are moved to the disc recording / reproducing position (position C) by the rotation of the second pull-in roller 22 as required during recording / reproducing, and the MD recording / reproducing unit 29 is operated.
Be attached to. Then, when recording / reproducing another storage disc, the MD control circuit 45 controls the MD disc stocker rotation motor 27 to rotate the MD disc stocker 19 via the MD disc stocker rotation roller 26, thereby obtaining a desired MD disc. Is moved to a position immediately before the second pull-in roller 22 (position B). Then, similarly to the above, by the rotation of the second pull-in roller 22, it is moved to the disc recording / reproducing position (position C) and mounted on the MD recording / reproducing unit 29.

Now, five disks are stored in the MD disk stocker 19, and each disk is set to the state shown in Table 1 below by the erroneous erasure prevention hole detection switch 16 and the disk type hole detection switch 17. Suppose The status of each disk is displayed on the display device 9.

[0030]

[Table 1]

By giving an instruction from the key input terminal 49, the setting can be changed as shown in Table 2 below.

[0032]

[Table 2]

The changed result is confirmed by the display device 9.

In the case where the erroneous erasure prevention hole 62 of the recordable disc is blocked by the slide member 65 from the beginning, the setting by the slide member 65 is given priority and the key input terminal 49 may give an instruction. However, if you set it so that it cannot be changed to recordable, you will not accidentally record an important disc that should never be erased and overwrite it. However, the slide member 6
The instruction from the key input terminal 49 may be prioritized over the setting by 5. Further, the priority order may be switched according to the user's selection.

[0035]

As described above in detail, according to the present invention, a disc recording / reproducing device has a disc accommodating portion for accommodating a plurality of discs and selectively records / reproduces the discs accommodated in the disc accommodating portion. In the apparatus, a disc type detecting means for detecting whether the disc is a read-only disc or a recordable / reproducible disc, and a disc recordable / non-recordable discriminating device for detecting recordable / non-recordable disc Means, memory means for storing information from the disc type detection means and disc recordable / non-recordable detection means, and at least the disc recordable / not recordable
Since the disc recordable / non-recordable changing means for changing the recordable / non-recordable setting is provided for the disc judged to be recordable by the recordable / non-recordable detecting means, it is possible to record a disc without taking out the disc one by one. It is easy to enable or disable recording.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a mechanism configuration of a disc recording / reproducing apparatus of the present invention.

FIG. 2 is a circuit block diagram showing a configuration of an audio signal processing portion of the disc recording / reproducing apparatus of the present invention.

FIG. 3 is a side sectional view of a main part showing the structure of a magneto-optical disk.

FIG. 4 is a diagram showing configurations of an erroneous erasure prevention hole detection switch and a disk type hole detection switch.

FIG. 5 is a view showing a cartridge of a recordable disc.

[Explanation of symbols]

 9 display device 10 memory 16 erroneous erasure prevention hole detection switch 17 disc type hole detection switch 19 MD disc stocker 20 MD disc insertion opening 21 first pulling roller 22 second pulling roller 23 MD disc insertion sensor 24 first pulling roller drive motor 25 Second pull-in roller drive motor 26 MD disc stocker rotary roller 27 MD disc stocker rotary roller drive motor 29 MD recording / reproducing unit 30 magneto-optical disc 31 recording magnetic head 32 head drive circuit 33 digital signal processing circuit 34 ATRAC processing circuit 35 A / D Conversion circuit 36 Analog signal input terminal 37 Spindle motor 38 Optical pickup 39 Feed motor 40 Digital signal processing circuit 41 ATRAC processing circuit 42 D / A conversion circuit 43 Analog signal output terminal 44 Servo control circuit 45 MD control circuit 49 Key input terminal 50 Lead-in area 51 UTOC area 52 Program area 53 Lead-out area 60 Disc cartridge 62 Erase erasure prevention hole 63 Disc type hole 64 Shutter 70 roller 71 switch

Claims (1)

[Claims] 1. A disc recording / reproducing apparatus which has a disc storage portion for storing a plurality of discs and selectively records / reproduces the discs stored in the disc storage portion. Disc type detecting means for detecting whether the disc is a reproducible disc, disc recordable / non-recordable disc detecting means for detecting recordable / unrecordable disc, and disc type detecting means and disc recordable / A memory means for storing information from the non-recordable detection means, and at least a disc recordable / recordable for changing the recordable / non-recordable setting with respect to the disc judged to be recordable by the disc recordable / non-recordable detection means A disc recording / reproducing apparatus comprising an improper changing unit.