JP3318911B2 - Optical disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Table of Contents] The present invention will be described in the following order. BACKGROUND OF THE INVENTION Problems to be Solved by the Invention Means for Solving the Problems (FIGS. 1 and 2) Operation (FIGS. 1 and 2) Example (1) Overall Configuration (FIG. 1) (2) (2) Operation of control circuit (FIG. 2) (3) Effects of embodiment (4) Other embodiments Effects of the invention

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device,
For example, the present invention can be applied to an in-vehicle magneto-optical disk device that records data by connecting to a compact disk player, a navigation system, or the like.

[0003]

2. Description of the Related Art Conventionally, in a car audio system, a playback-only device such as a compact disk player or a playback-only tape recorder is connected, and a recorded recording medium can be played to listen to music or the like. Has been made.

[0004]

By the way, in a car audio system, if not only a reproduction-only device but also a recording device can be connected, the usability of this type of audio system can be improved and it is considered to be convenient. .

[0005] In this case, some optical disk devices can reproduce a compact disk in addition to recording and reproduction of a magneto-optical disk. If this type of optical disk device can be mounted instead of a compact disk player, usability is improved. It is thought that it can be improved.

That is, the optical disc device has a feature that it is easier to use than a tape recorder because it can select a random music and reproduce a high-quality audio signal. Further, in the optical disk device, the user can record a desired performance, so that the user can record and enjoy a desired music program like a tape recorder.

[0007] Therefore, if the optical disk device is applied to a vehicle and can be recorded in a vehicle, the usability of the vehicle audio system can be further improved.

However, in this type of optical disk apparatus, a track jump occurs when a large vibration is applied, and there is a possibility that recorded audio data may be destroyed during recording. For this reason, simply applying this type of optical disc device to a vehicle-mounted one cannot end up recording during traveling, which causes a problem that the usability is deteriorated.

Further, in this type of optical disc apparatus, it is conceivable that the ignition key is turned off during recording, and in this case, in the audio system, it is necessary to start recording again and resume recording, which is convenient. There is a problem that gets worse.

The present invention has been made in view of the above points, and it is an object of the present invention to propose an optical disk device which can be applied to a portable device such as an in-vehicle device to improve usability.

[0011]

According to the present invention, there is provided a reproducing means for reproducing a predetermined audio signal, and an audio signal output from the reproducing means for compressing the audio signal. In the vehicle-mounted optical disk device 1 provided with the recording means 6 to 17 for storing the data in the buffer memory 10 in cluster units and then recording the data in the disk-shaped recording medium 5 in cluster units, the reproducing means 2 and the recording means 6 to 17 And a power supply detecting means 4 for detecting the presence or absence of power supply from outside to the optical disc device 1 mounted on the vehicle. The control means controls the disc-shaped recording by the recording means 6-17. If the power supply detecting means 4 detects that the power supply to the optical disk device 1 for vehicle is stopped during recording on the medium 5, the reproducing means 2 outputs The stop control of the audio signal D1 is performed, the time code signal TC of the audio signal D1 at the time of the stop is detected, and at the same time, the stop of the recording of the audio signal D1 being recorded in the recording means 6 to 17 is controlled, and the stop of the audio signal D1 is stopped. When the address data at the recording position is detected and it is detected that power is supplied to the optical disk device 1 mounted on the vehicle, the power is supplied based on the time code signal TC and the address data at the stop position at the time of the stop control. The audio signal D1 after the stop point is output again from the reproducing unit 2 in cluster units, and at the same time, the audio signal D1 after the power supply stop point is recorded in the cluster units 6-1.
7 to start re-recording.

[0012]

When it is detected that the power supply to the on-vehicle optical disc device 1 is stopped while the audio signal D1 is being recorded on the disc-shaped recording medium 5, the audio signal D1 being reproduced and output is stopped and controlled. The time code signal TC of the audio signal D1 at the time of the stop is detected. At the same time, the recording of the audio signal D1 being recorded is controlled to be stopped, and the address data of the recording position of the stopped audio signal D1 is detected. When the power supply to the device 1 is detected, the audio signal D1 after the power supply stop time is reproduced and output in cluster units based on the time code signal TC and the address data at the stop position where the stop control is performed, and the power The recording operation is started by re-recording the audio signal D1 after the supply stop time in cluster units. Even if the user turns off the ignition key to stop the power supply by mistake, when the ignition key is turned on and the power supply is restarted, the time code signal TC and the address data of the stop position at which the stop was controlled are controlled. , The audio signal D1 after the power supply stop time can be reproduced and output in cluster units, and at the same time, the audio signal D1 after the power supply stop time can be re-recorded in cluster units, which is valuable in data continuity. The recording process of the audio signal D1 can be executed while accurately maintaining the continuity as music without re-recording the audio signal from the beginning.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

(1) Overall Configuration In FIG. 1, reference numeral 1 denotes an on-vehicle optical disk apparatus as a whole, and a reproducing apparatus 2 comprising a compact disk player.
To record the digital audio signal D1.

For this reason, the playback device 2 switches its operation based on the control data DC output from the control circuit 4, and this control circuit 4 responds to the operation of the operating element arranged on the dashboard to operate the playback device 2. Switch the operation. Further, the reproducing device 2 reproduces the compact disc and outputs a digital audio signal D1 obtained as a result, and also outputs a time code signal TC including time information of the digital audio signal D1.

Thus, in the optical disk device 1,
For example, when a track jump or the like occurs during recording, the digital audio signal D1 can be re-recorded based on the time code signal TC. Further, the reproducing apparatus 2 outputs an error detection signal SE when one of the tracking error signal and the focus error signal becomes higher than a predetermined reference level.

That is, if a compact disc player makes a track jump due to vibrations or the like, or if it makes a large detrack or defocus, the compact disc cannot be reproduced correctly. One of them changes greatly. Thus, in the reproducing apparatus 2 , when either one of the tracking error signal and the focus error signal greatly changes, it can be determined that an error has occurred in the data output operation for outputting the digital audio signal D1, and the optical disk apparatus In step 1, the digital audio signal D1 is re-recorded based on the result of this determination.

In the optical disk apparatus 1, a magneto-optical disk 5 is reproduced by a predetermined reproducing system to output a reproduced audio signal. On the other hand, in the recording system, the digital audio signal D1 is transmitted via a selection circuit 6 to a memory controller. Enter 8

The memory controller 8 compresses the digital audio signal D1 and then stores the data in a buffer memory (RAM) 10 in predetermined cluster units.

The buffer memory 10 is formed of a large-capacity memory circuit, and can store several seconds of audio data in terms of a digital audio signal D1.

The memory controller 8 outputs the audio data stored in the buffer memory 10 to the signal processing circuit 12, and at this time, outputs the audio data intermittently at a higher transmission rate than during the storage. Further, the memory controller 8 monitors the free space of the buffer memory 10 and outputs the monitoring result to the control circuit 4, whereby the control circuit 4
The free space of the buffer memory 10 can be detected.

The signal processing circuit 12 performs an encoding process for error correction on the audio data output from the memory controller 8, converts the audio data into a recording signal, and converts the audio data into a recording signal.
4 is output. Thus, in the optical disc device 1, the optical pickup 16 is driven by the recording signal via the amplifier circuit 14. The optical pickup 16 irradiates a light beam to a magneto-optical disk which is driven by a spindle motor 17 and rotates at a predetermined rotation speed, and applies a predetermined modulation magnetic field.

As a result, the magneto-optical disk drive 1 can record a digital audio signal thermomagnetically. At the time of this recording, in the optical disk device 1, the output signal of the optical pickup 16 is
The digital audio signal D1 which is sequentially input is divided into cluster units and sequentially recorded at a predetermined recording position.

On the other hand, the servo circuit 20 controls the focus and tracking of the optical pickup 16 by monitoring the output signal of the optical pickup 16.

At this time, when the tracking error signal or the focus error signal rises above a predetermined reference level, the servo circuit 20 determines that the optical pickup 2 has made a track jump, and sends a servo error signal E to the control circuit 4.
Output S.

Thus, in the optical disk device 1,
By stopping the recording operation based on the servo error signal ES, erroneous erasure of the recorded data is prevented.

In the optical disk device 1, the audio signal S1 can be inputted via an analog-to-digital conversion circuit (A / D) 22, whereby the contacts of the selection circuit 6 are switched to switch the digital audio signal D1.
1, an audio signal S1 input in the form of an analog signal can be recorded.

(2) Operation of Control Circuit The control circuit 4 has a random access memory (RAM) 24
Read-only memory (R
By sequentially processing the processing programs stored in the OM) 26, the processing procedure shown in FIG. 2 is executed, and the digital audio signal D1 is recorded.

That is, the control circuit 4 sets the reproducing apparatus 2 and the optical disk apparatus 1 to the reproducing mode and the recording mode, respectively, and then, when the recording start operation is pressed, proceeds from step SP1 to step SP2. Then, the control data DC is output to 2 to start the reproduction operation.

At the same time, the control circuit 4 outputs control data to each circuit block of the optical disk device 1, thereby bringing the optical disk device 1 into an operating state. Thus, the optical disk device 1 reproduces the compact disk by the reproducing device 2 and records the resulting digital audio signal D1 on the magneto-optical disk 5.

Subsequently, the control circuit 4 proceeds to step SP3, where the error detection signal SE and the servo error signal E
It is determined whether or not an error has occurred based on S. If a negative result is obtained here, the process proceeds to step SP4, where it is determined whether or not the ignition key has been turned off.

If a negative result is obtained here, the control circuit 4
Moves to step SP5, determines whether or not the stop operation member is pressed, and if a negative result is obtained, the process proceeds to step SP5.
Return to 3. As a result, the control circuit 4 executes step SP3-
The processing loop LOOP1 of SP4-SP5-SP3 is repeated, and the digital audio signal D1 reproduced sequentially is recorded.

On the other hand, if an accident such as a track jump occurs in the reproducing apparatus 2 or the optical disk apparatus 1, a negative result is obtained in step SP3, and the control circuit 4 proceeds to step SP6 to stop and control the recording operation. .

In the stop control of the recording operation, when the error detection signal SE and the servo error signal ES rise, the light amount of the optical pickup 16 is immediately reduced, thereby preventing erroneous erasure of the recorded data.

The control circuit 4 further includes an error detection signal SE
The time code signal TC at the time when the servo error signal ES rises is taken into the memory 24, and the digital audio signal D1 input at the time when the error occurs is detected with reference to the time code signal TC. At the same time, the control circuit 4 outputs a control signal to the signal processing circuit 12 and the servo circuit 20, and detects address data at the time when the error detection signal SE or the servo error signal ES rises.

Thus, in the optical disk device 1,
At the time of occurrence of the error, the digital audio signal D1 being input, the audio data being recorded, and the recording position of the recording data are detected.

Subsequently, the control circuit 4 proceeds to step SP7, in which a control signal is output to the memory controller 8 and the servo circuit 20, and the audio data being recorded at the time of occurrence of the error is replaced with the audio data at the time of occurrence of the error. Make it possible to re-record at the recording position. That is, in the optical disk device 1, by storing and recording audio data in the large-capacity memory circuit 10, by re-outputting the audio data from the memory circuit 10, audio data that could not be recorded is also reproduced. Can be recorded.

Further, in this type of optical disc apparatus 1, the magneto-optical disc 5 is divided into predetermined recording areas, and an address is assigned to each recording area. Audio data can be re-recorded. Thus, the magneto-optical disk device 1 controls the memory controller 8 and the servo circuit 20, and the audio data of one cluster, which is a recording unit corresponding to the recording area, is traced back to the cluster at the time when the error occurred. Re-output audio data from

Subsequently, the control circuit 4 proceeds to step SP8, where it determines whether or not an error has occurred in the magneto-optical disk device 1 on the recording side. If an affirmative result is obtained here, the control circuit 4 proceeds to step SP9. , The memory 10 overflows.

That is, even when the audio data stored in the memory 10 is re-output and re-recorded, if this operation is repeated frequently, the empty area of the memory 10 becomes small, and finally, the digital audio data sequentially input The signal D1 cannot be stored, and consequently a continuous performance cannot be recorded.

For this reason, the control circuit 4 determines whether or not the memory 10 has overflown based on the monitoring result of the memory 10 output from the memory controller 8, and if a negative result is obtained here, proceeds to step SP10. .

Here, the control circuit 4 starts the recording operation of the audio data by going back to the cluster at the time when the error occurred with reference to the address data stored in the memory 24, and then proceeds to step SP5. Thus, in the optical disc apparatus 1, even when an accident occurs during recording such as track jump on the recording side, audio data can be recorded so that the performance is continuous, and even when the optical disc apparatus is applied to a vehicle, the audio data can be reliably recorded. Audio signals can be recorded.

On the other hand, if the memory 10 overflows, a positive result is obtained in step SP9, and the control circuit 4 proceeds to step SP11.

Here, the control circuit 4 outputs the control data DC to the reproducing apparatus 2 and controls the reproduction apparatus 2 to stop.

Subsequently, the control circuit 4 proceeds to step SP12, moves the optical pickup of the reproducing apparatus 2 to the inner circumference side, and then proceeds to step SP13 to resume reproduction. Further back from the digital audio signal recorded by the optical disc device 1,
The reproduction of the digital audio signal D1 is started.

Subsequently, the control circuit 4 proceeds to step SP10, outputs control data to each circuit block, and thereby starts recording the digital audio signal D1 at a predetermined timing. This recording start timing starts recording of the digital audio signal D1 retroactively to the cluster at the time when the error occurred by starting to take in the audio data into the memory circuit 10 based on the time code signal TC.

Regarding the recording position, the recording operation is started from the cluster being recorded when an error occurs with reference to the cluster address, so that the digital audio signal cannot be recorded from the recording area that could not be recorded due to the occurrence of the error. Resume recording.

Thus, in the optical disk device 1,
Even if accidents during recording such as track jumps occur frequently on the recording side, audio data can be recorded so that the performance continues, and audio signals can be reliably recorded even when the optical disk device is applied to a vehicle. .

On the other hand, if an accident such as a track jump occurs on the reproducing side, a negative result is obtained in step SP8, and the control circuit 4 proceeds to step SP1.
Move to 1.

That is, when the recording side jumps the track, the reproduction operation can be continued unless the memory circuit 10 overflows, whereas when the reproduction side jumps the track, it becomes difficult to obtain a continuous reproduction signal. For this reason, in the control circuit 4, similarly to the case where the memory circuit 10 overflows, after stopping the reproduction device 2,
At step SP12, the reproduction of the digital audio signal D1 is started further back from the cluster recorded by the optical disc device 1 at the time when the error occurs.

Further, the control circuit 4 determines in step SP12-
The processing steps of SP13-SP10 are sequentially executed, so that even if an accident during reproduction such as a track jump occurs on the reproduction side, audio data can be recorded so that the performance continues, and the optical disk device is applied to a vehicle. In this case, the audio signal can be reliably recorded.

On the other hand, if the user turns off the ignition key by mistake during recording, the control circuit 4 proceeds to step SP14 because a positive result is obtained in step SP4, and the reproduction apparatus 2 and the operation of the optical disk device 1 are stopped and controlled.

At this time, the control circuit 4 fetches the time code signal TC into the memory 24, thereby detecting the digital audio signal D1 input at the time when the ignition key is turned off with reference to the time code signal TC. I do.

At the same time, the control circuit 4 outputs a control signal to the signal processing circuit 12 and the servo circuit 20, and detects address data at the time when the ignition key is turned off.

Thus, in the optical disk device 1,
The digital audio signal D1 being input, the audio data being recorded, and the recording position of the audio data at the time when the ignition key is turned off are detected.

Subsequently, the control circuit 4 proceeds to step SP15, in which it determines whether or not the ignition key has been turned on. If a negative result is obtained, step SP15 is repeated.

On the other hand, when the ignition key is turned on, the process proceeds to step SP12, where the recording is performed at the time when the ignition key is turned off based on the address data and the time code signal stored in the memory 24. The audio data continuous from the audio data is re-recorded from the recording position at the time when the ignition key is turned off.

Thus, even when the user turns off the ignition key during recording, audio data can be recorded so that the performance continues, and the usability can be improved even when the optical disk device is applied to a vehicle. Can be.

On the other hand, if the recording stop operator is pressed, the control circuit 4 obtains a positive result in step SP5, and proceeds to step SP16 to stop and control the recording operation, and then proceeds to step SP17. Then, the processing procedure ends.

(3) Effects of the Embodiment According to the above configuration, an accident such as a track jump is detected during recording, and reproduction and recording are resumed retroactively from the time when the accident occurred, so that a track jump or the like is prevented. Even if accidents occur frequently, you can record continuous performances without omission,
It can be applied to in-vehicle use or the like to improve usability.

Further, by detecting the ON / OFF operation of the ignition key and similarly restarting the reproduction and the recording,
Even if the user turns off the ignition key during recording, continuous performances can be recorded without omission,
It can be applied to in-vehicle use or the like to improve usability.

(4) Other Embodiments In the above-described embodiments, the case where recording is restarted in units of clusters has been described. However, the present invention is not limited to this, and recording may be restarted in units of one song. Alternatively, in this case, for example, the operation on the reproducing side can be controlled based on a start ID signal used in a digital audio tape recorder or the like.

Further, in the above-described embodiment, the case where the recording start timing of the digital audio signal D1 is detected on the basis of the time code signal has been described. However, the present invention is not limited to this. Address data or the like may be used as a reference, and when recording is resumed in song units, a silent period may be detected to generate a recording start timing.

Further, in the above-described embodiment, the case where a compact disc player is connected to record a digital audio signal has been described. However, the present invention is not limited to this, and the present invention is not limited to the case where an analog audio signal is recorded. Can be widely applied.

In particular, in this type of optical disk device,
In combination with the navigation system, it is conceivable to record the position information output intermittently from the navigation system side.In this case, the ignition key is accidentally turned off during the period of recording this position information. Can be considered.

However, by re-recording an information signal that could not be recorded by applying the present invention, valuable position information can be recorded without omission, and usability can be improved.

Further, in the above-mentioned embodiment, the case where the present invention is applied to the optical disk device for mounting on a vehicle has been described. However, the present invention is not limited to this, and for example, a portable optical disk device integrated with a compact disk player. Etc. can be widely applied.

[0068]

As described above, according to the present invention, even if the user turns off the ignition key and stops the power supply during the recording operation, the ignition key is turned on and the power supply is stopped. When restarted, the audio signal after the power supply stop time is reproduced and output in cluster units based on the time code signal and the address data of the stop position where the stop control was performed, and the audio signal after the power supply stop time is reproduced in cluster units. Since re-recording can be performed, it is possible to execute recording processing of the audio signal while maintaining the continuity as music accurately without re-recording the audio signal having a value in data continuity from the beginning. It is possible to further improve the usability even under the use environment where the power supply may be stopped accidentally for the vehicle It is possible to realize an optical disc apparatus for vehicle.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an optical disk device according to one embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk apparatus, 2 ... Playback apparatus, 4 ... Control circuit, 5 ... Optical disk, 10 ... Memory circuit, 16 ...
Optical pickup.

Claims (1)

(57) [Claims] (1)Reproducing means for reproducing a predetermined audio signal
And the audio signal output from the reproducing means.
Data is compressed and stored in buffer memory in predetermined cluster units.
After the storage, the above-mentioned cluster unit
Recording means for recordingFor in-vehicle optical disk devices
AndControl means for interlockingly controlling the reproducing means and the recording means
When,  Power supply from outside to the above-mentioned optical disc device
Power supply detecting means for detecting nothing,The control means includes: During recording on the disk-shaped recording medium by the recording means
In addition, the power supply detecting means detects the optical
When it is detected that the power supply to the
Stop the audio signal being output from the playback means.
Stop control and the audio signal
Imcode signal is being detected and simultaneously recorded in the above recording means
Control and stop recording of the above audio signal
The address data at the recording position of the audio signal
Detect Check that power has been supplied to the optical disc
Is detected, the stop position at the time of the stop control is
Based on the time code signal and the above address data
The audio signal after the power supply is stopped
The above-mentioned power is output simultaneously from the reproduction means in units of
The above audio signal after the power
Start re-recording by the above recording means in data units Specially
Optical disk device for in-vehicle use.