JPH11167739A - Optical disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the device comparatively small in size and to reduce the cost. SOLUTION: In an optical disk recording/reproducing device comprising a first optical pickup driving device 2; having an optical pickup 2a for reproducing an information signal recorded in an optical disk, a feeding mechanism 2b of the optical pickup and rotating mechanisms 2c, 2d of the optical disk; and a second optical pickup driving device 1; having an optical pickup 1a for recording an information signal in the optical disk, a feeding mechanism 1b of the optical pickup, rotating mechanisms 1c, 1d of the optical disk and a recording mechanism 1e, after the information signal reproduced from the optical disk of the first optical pickup driving device 2 is once stored in a memory 9, the information signal is recorded in the optical disk of the second optical pickup driving device 1, and servo systems 6 and 5 for the first and second optical pickup driving devices 2 and 1 are alternately operated and at least one of a RF amplifier IC 4, a signal processing IC 7 and the memory 9 of a driving circuit of the first and second optical pickup driving devices 2 and 1 is used in common.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to, for example, a CD (Compac
Optical disc recording suitable for use in a composite device having an optical pickup driving device for reproducing a CD which reproduces a CD (Disc) and an optical pickup driving device for reproducing a MD (Mini Disc) which records and reproduces an MD (Mini Disc). It relates to a playback device.

[0002]

2. Description of the Related Art In recent years, there has been proposed an optical disk recording / reproducing apparatus having a CD reproducing optical pickup driving apparatus for reproducing a CD and an MD recording / reproducing optical pickup driving apparatus for recording / reproducing an MD. .

In such an optical disk recording / reproducing apparatus, C
D and MD can be reproduced as desired, and information signals reproduced from CD can be recorded on MD.

[0004]

However, in such an optical disk recording / reproducing apparatus in which an information signal reproduced from a conventional CD is recorded on an MD, a driving circuit for driving an optical pickup driving apparatus for reproducing a CD is constructed. R
The F amplifier IC, the signal processing IC, and the memory, and the RF amplifier IC, the signal processing IC, and the memory that constitute the driving circuit for driving the optical pickup driving device for MD recording / reproducing are separately provided for exclusive use. In addition, there is a disadvantage that the cost increases.

In view of the above, an object of the present invention is to relatively reduce the size of the configuration and reduce the cost.

[0006]

According to the present invention, an optical disk recording / reproducing apparatus comprises: an optical pickup for reproducing an information signal recorded on an optical disk; a feed mechanism of the optical pickup;
A first optical pickup driving device having a rotation mechanism for the optical disc, an optical pickup for recording information signals on the optical disc, a feeding mechanism for the optical pickup, a rotation mechanism for the optical disc, and a second optical pickup driving device having a recording mechanism In the optical disc recording / reproducing apparatus having the above structure, the information signal reproduced from the optical disc of the first optical pickup driving device is temporarily stored in a memory, and then the information signal is recorded on the optical disc of the second optical pickup driving device. And the servo systems of the first and second optical pickup driving devices are operated alternately, and the RF amplifier IC, the signal processing IC, and the memory of the driving circuit of the first and second optical pickup devices are operated. At least one of them is commonly used.

According to the present invention, at least one of the RF amplifier IC, the signal processing IC, and the memory of the driving circuits of the first and second optical pickup driving devices is commonly used. And the cost can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention, an optical disc, will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an MD (Mini Disc),
An MD pickup / playback optical pickup driving device that records an information signal such as an audio signal and reproduces an information signal such as a sound signal recorded on the MD is shown. , A feed mechanism comprising a thread feed motor 1b for feeding the optical pickup 1a in the radial direction of the MD, a spindle motor 1c for rotating the MD, and a turntable. 1d and a recording mechanism such as a recording magnetic head 1e for recording information signals on the MD in cooperation with the optical pickup 1a.

Reference numeral 2 denotes an optical pickup driving device for reproducing a CD (Compact Disc) which reproduces an information signal, for example, an audio signal recorded on a CD, as is well known. An optical pickup 2a for reading (reproducing), a feed mechanism including a thread feed motor 2b for feeding the optical pickup 2a in the radial direction of the CD, and a disk including a spindle motor 2c and a turntable 2d for rotating the CD. Consists of a rotating mechanism.

In this embodiment, information such as audio signal information, focus information, and tracking information obtained by the optical pickup 1a of the MD recording / reproducing optical pickup driving device 1 is supplied to one fixed contact 3a of the changeover switch 3. At the same time, information such as audio signal information, focus information, and tracking information obtained by the optical pickup 2a of the optical pickup driving device 2 for CD reproduction is supplied to the other fixed contact 3b of the changeover switch 3.

The switching of the movable contact 3c of the changeover switch 3 is controlled by a system controller 8, which will be described later.

Information such as audio signal information, focus information, and tracking information obtained at the movable contact 3c of the changeover switch 3 is supplied to the RF amplifier IC 4. As the RF amplifier IC 4, an RF amplifier IC 4 used for a drive circuit of the MD recording / reproducing optical pickup driving device 1 is used. The RF amplifier IC 4 generates an amplifying function, generation of a focus error signal, generation of a signal for on / off control of a focus servo,
It is configured to perform functions such as generation of a tracking error signal.

The focus error signal obtained by the RF amplifier IC 4 is supplied to the focus control mechanism of the optical pickup 1a of the MD recording / reproducing optical pickup driving device 1 via the focus servo circuit of the MD driver IC 5, and the focus is controlled. At the same time, the focus error signal obtained by the RF amplifier IC 4 is supplied to the focus control mechanism of the optical pickup 2a of the optical pickup driving device 2 for CD reproduction via the focus servo circuit of the driver IC 6 for CD. Control.

The tracking error signal obtained by the RF amplifier IC 4 is supplied to the tracking control mechanism of the optical pickup 1a via the tracking servo circuit of the MD driver IC 5 to control the tracking and output signals of the tracking servo circuit. Is supplied to a thread feed motor 1b of the optical pickup 1a via a thread servo circuit.
b is controlled.

The tracking error signal obtained by the RF amplifier IC 4 is transmitted to the optical pickup 2 a via the tracking servo circuit of the CD driver IC 6.
To control the tracking and output signals from the tracking servo circuit to control the sled feed motor 2b of the optical pickup 2a via the sled servo circuit.

The audio signal information obtained by the RF amplifier IC 4 is supplied to the signal processing IC 7. The signal processing IC 7 has a function of decoding an audio signal from audio signal information of a CD and decoding an audio signal from audio signal information of an MD in cooperation with a system controller 8 composed of a microcomputer. A constant linear velocity (CLV) control signal is generated from the audio signal information.

A constant linear velocity control signal obtained by the signal processing IC 7 is supplied to the spindle motor 1c via the spindle servo circuit of the MD driver IC 5, and the rotation of the spindle motor 1c is controlled to keep the linear velocity relative to the MD constant. And a linear velocity constant control signal obtained by the signal processing IC 7 is supplied to the spindle motor 2c via the spindle servo circuit of the CD driver IC 6, and the rotation of the spindle motor 2c is controlled to keep the linear velocity for the CD constant. So that

Each of the MD driver IC 5 and the CD driver IC 6 has a communication function with the system controller 8, and controls various servos specific to the MD and the CD in accordance with a command from the system controller 8. .

Reference numeral 9 denotes, for example, a 1 Mbit R which constitutes a memory connected to the signal processing IC 7 via a bus line.
The RAM 9 is used for signal processing, and is used as a memory for temporarily storing audio signals when recording audio signals from a CD described later on the MD. 10
Is a display for displaying commands from the system controller 8 and the like.

The audio signal obtained at the output side of the signal processing IC 7 is converted from a digital signal into an analog signal by a DA converter.
The audio signal is supplied to audio signal output terminals 13a and 13b via the conversion circuit 11 and the audio amplifier circuits 12a and 12b.

In this embodiment, when the audio signal reproduced from the CD is recorded on the MD, the digital audio signal reproduced from the CD is temporarily converted into an R signal by the signal processing IC 7.
The audio signal stored in the AM 9 and then read from the RAM 9 is converted into a signal in the MD format via an ATRAC encoder or the like, and the audio signal in the MD format is used as a magnetic head 1e of the optical pickup 1 for MD recording and reproduction.
To be recorded on the MD.

Since the present embodiment is configured as described above, M
When reproducing D, the movable contact 3c of the changeover switch 3 is connected to one fixed contact 3a, and the audio signal is converted by the signal processing IC 7 via the ATRAC decoder to the DA.
The data is supplied to the conversion circuit 11.

At this time, the optical pickup 1 is provided by the MD.
Information such as audio signal information, focus information, and tracking information obtained through
The focus error signal and the tracking error signal that are supplied to the amplifier IC 4 and obtained by the RF amplifier IC 4 are supplied to the MD driver IC 5, and the focus and tracking of the optical pickup 1 a of the MD recording / reproducing optical pickup driving device 1 are controlled. At the same time, the thread motor 1b is controlled.

The MD audio signal information obtained by the RF amplifier IC 4 is supplied to a signal processing IC 7, which decodes the audio signal and obtains a constant linear velocity control signal, which is obtained by the signal processing IC 7. A constant linear velocity control signal is supplied to the MD driver IC 5, whereby the rotation of the spindle motor 1c of the MD recording / reproducing optical pickup driving device 1 is controlled, and the MD recording / reproducing optical pickup driving device 1 is driven in the same manner as before. , This MD
Can be reproduced as before.

When reproducing a CD, the movable contact 3c of the changeover switch 3 is connected to the other fixed contact 3b, and the signal processing IC 7 supplies an audio signal to the DA converter 11 without passing through the ATRAC decoder. Like so.

At this time, the optical pickup 2 is
Information such as audio signal information, focus information, and tracking information obtained through
The focus error signal and the tracking error signal that are supplied to the amplifier IC 4 and obtained by the RF amplifier IC 4 are supplied to the CD driver IC 6 to control the focus and tracking of the optical pickup 2 a of the CD reproduction optical pickup driving device 2. The thread motor 2b is controlled.

The audio signal information of the CD obtained by the RF amplifier IC 4 is supplied to the signal processing IC 7. The signal processing IC 7 decodes the audio signal and obtains a constant linear velocity control signal, which is obtained by the signal processing IC 7. The constant linear velocity control signal is supplied to the CD driver IC 6, whereby the optical pickup driving device 2 for CD reproduction is driven in the same manner as before, and the CD can be reproduced in the same manner as before.

Therefore, according to the optical disk recording / reproducing apparatus according to the present embodiment, only by switching the changeover switch 3, M
D and CD can be reproduced arbitrarily.

Further, in this embodiment, as described below, the C reproduced by the optical pickup driving device 2 for reproducing CD is used.
The D audio signal is recorded on the MD by the MD recording / reproducing optical pickup driving device 1.

When the system controller 8 comprising a microcomputer is instructed to record the audio signal from the CD on the MD, the system controller 8
Connects the movable contact 3c of the changeover switch 3 to the other fixed contact 3b for the first T time. At this time, the system controller 8 instructs the RF amplifier IC 4, the signal processing IC 7, and the CD driver IC 6, and the CD driver IC 6
Is set to the operating state, that is, the servo system of the CD is set to the operating state.

Further, the system controller 8 instructs the CD to rotate at a speed higher than the standard, for example, at a double speed during the first T time, so that the CD rotates at a double speed, for example. In this case, the audio signal information is read from the CD at twice the normal speed. The audio signal information read from the CD is signal-processed by the signal processing IC 7, and the digital audio signal is temporarily stored in the RAM 9.

Here, the time T can be set arbitrarily within a range not exceeding the capacity of the RAM 9 as a memory. In this example, the audio signal information is read from the CD at twice the speed and stored in the RAM 9.
9 at standard speed,
When read out from the AM 9 and supplied to the DA conversion circuit 11, a continuous audio signal can be reproduced for 2T time.

[0034] Thereafter, the system controller 8 connects the movable contact 3c of the switch 3 to the subsequent T ₀ hour one fixed contact 3a, this time, the system controller 8 RF amplifier IC 4, the signal processing IC 7, drivers for MD Command to the IC driver IC5 and the CD driver IC6 to make the CD driver IC6 inoperative and
The D driver IC 5 is set to the operating state, that is, the CD servo system is set to the non-operating state, and the MD servo system is set to the operating state.

At this time, the audio signal stored in the RAM 9 is read out from the RAM 9 and is read by the signal processing IC 7 in the MD.
The signal is converted into an audio signal of a format, and then supplied to the recording magnetic head 1e so that the MD recording / reproducing optical pickup driving device 1 records the signal on the MD.

In this case, the MD format signal to be recorded on the MD is a digital audio signal reproduced from a CD by about one.
Since the data is compressed to / 5, recording on this MD is completed in about T ₀ = T / 5 hours.

Here, the time required for recording is the sum of the time T for reproducing the CD and the time T ₀ = T / 5 for recording on the MD, so that T + T / 5 = 6T / 5 ≦ 2T. Changeover switch 3 again after recording to MD
By switching the movable contact 3c to the other fixed contact and repeating the above, in this case, the audio signal reproduced from the CD can be recorded on the MD without interruption of the monitored audio.

As described above, in this embodiment, the RF amplifier IC 4, the signal processing IC 7, and the RAM 9, which constitute the drive circuit of the MD recording / reproducing optical pickup driving device 1, are used to drive the CD reproducing optical pickup driving device 2. Since the driving circuit is commonly used, the configuration of the driving circuit is reduced, and there is an advantage that the cost of the driving circuit can be significantly reduced.

In the above-mentioned example, since the signal processing IC 7 is shared, it is necessary to process both the uncompressed CD signal and the MD compressed signal. Processing IC, MD dedicated signal processing I
C may be provided, and these may be switched and used by a changeover switch.

In the above embodiment, the present invention is applied to the disk reproducing apparatus having the MD recording / reproducing optical pickup driving device 1 and the CD reproducing optical pickup driving device 2. However, the present invention relates to other optical pickups. Optical disc recording / reproducing device having two driving devices, for example, MD
An optical disk recording / reproducing apparatus for recording a reproduction signal of a CD on an MD, an optical disk recording / reproducing apparatus for recording a reproduction signal of a CD on a CD-R, and a DVD reproducing signal of a CD
-It is needless to say that the present invention can be applied to an optical disk recording / reproducing apparatus that records data in a RAM.

In the above example, the RF amplifier IC of the driving circuit is used.
4, an example in which the signal processing IC 7 and the memory 9 are commonly used has been described, but the RF amplifier IC 4, the signal processing IC 7,
It can be easily understood that the same operation and effect as described above can be obtained even when at least one of the memories 9 is commonly used.

Further, the present invention is not limited to the above-described example, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.

[0043]

According to the present invention, an RF amplifier IC, a signal processing IC, and a driving circuit of one of the optical pickup driving devices are provided.
Since at least one of the memories is commonly used for the driving circuit of the other optical pickup driving device, there is an advantage that the configuration of the driving circuit is reduced and the cost is reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of an optical disk recording / reproducing apparatus of the present invention.

[Explanation of symbols]

1 ‥‥ MD recording / playback optical pickup drive, 1
a, 2a {optical pickup, 1b, 2b} thread motor, 1c, 2c} spindle motor, 1d, 2
d ‥‥ turntable, 1e ‥‥ recording magnetic head, 2
{Optical pickup driving device for CD playback, 3} changeover switch, 4 RF amplifier IC, 5 driver IC for MD, 6 driver IC for CD, 7 signal processing IC, 8 system Controller (microcomputer), 9
{RAM, 10} display, 11 {DA conversion circuit, 12a, 12b} audio amplification circuit, 13
a, 13b ‥‥ Audio signal output terminal

Claims (5)

[Claims] An optical pickup for reproducing an information signal recorded on an optical disk, a feed mechanism for the optical pickup, a first optical pickup driving device having a rotation mechanism for the optical disk, and an optical pickup for recording an information signal on the optical disk An optical disc recording / reproducing apparatus having a feed mechanism for the optical pickup, a rotation mechanism for the optical disc, and a second optical pickup drive having a recording mechanism, wherein an information signal reproduced from the optical disc of the first optical pickup drive is provided. Is temporarily stored in a memory, and this information signal is recorded on the optical disk of the second optical pickup driving device, and the servo systems of the first and second optical pickup driving devices are alternately operated. Driving the first and second optical pickup driving devices An optical disc recording / reproducing apparatus characterized in that at least one of an RF amplifier IC, a signal processing IC, and a memory of a circuit is commonly used. 2. The optical disk recording / reproducing apparatus according to claim 1, wherein the optical pickup of the second optical pickup driving device is an optical pickup capable of recording an information signal on the optical disk and reproducing the information signal recorded on the optical disk. An optical disk recording / reproducing apparatus characterized by the above-mentioned. 3. The optical disc recording / reproducing apparatus according to claim 1, wherein each of the first and second optical pickup driving devices can record an information signal on the optical disc and reproduce the information signal recorded on the optical disc. An optical disc recording / reproducing apparatus, characterized in that the optical pickup can be used. 4. The optical disc recording / reproducing apparatus according to claim 1, wherein the optical disc of the first optical pickup driving device is rotated faster than a standard speed. . 5. The optical disk recording / reproducing apparatus according to claim 4, wherein the information signal reproduced from the optical disk of the first optical pickup driving device is continuously output as a sound, an image or the like. Optical disk recording and reproducing apparatus.