JP2566325Y2 - Optical disk recording and playback device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for a WO disk (one-time recording type optical disk), and more particularly to an optical disk recording / reproducing apparatus capable of arbitrarily creating a silent portion during recording of audio data. Related to the device.

[0002]

2. Description of the Related Art When a song or the like is recorded on a WO disk, a track number and an index number obtained by subdividing the track number are provided for each recording. These are recorded as subcodes together with audio data in the program area of the WO disk. At the end of each recording, recording information such as the recording start time and recording end time of each track number is recorded in the program memory area of the disk.

[0003] When the recording of the WO disk is completed, a recording corresponding to the TOC (table of contents) of the CD is made from the recording in the program memory area.

[0004] In addition, in the case of a normal CD, a silence between tunes is created at an index number of 00, but when this is made by a conventional WO disk recording device, a rec pause is pressed during recording, and an index number of 00 is created. Silence is recorded for a few seconds to put it into a pause state, and then the recording start key is pressed to record an index number 01 or less.

[0005] In this case, there is no problem if the recording is performed after the pause, but when the disc is taken out of the apparatus as it is, the recording is stopped and the index number 00 is not recorded in the program memory area. The time immediately before the recording of the index number 00 and the silence data is recorded in the program area as the last track number recording section.

The next time such a disc is recorded, silence data is recorded at the searched recording start position, and if further silence data is to be recorded, the silence data is already provided (recorded) on the optical disc. There is a problem that the pits cannot be reproduced because they are crushed.

[0007]

[Problems to be Solved by the Invention] This invention has been made in view of the above points, and its purpose is to provide a recording mute function to an optical disk recording / reproducing apparatus without causing the above-mentioned problems. Is to do.

[0008]

The optical disk recording / reproducing apparatus of the present invention is an optical disk recording / reproducing apparatus for recording recording information for each track in a program memory area of the optical disk. Search means for searching after the last track number recording section, detection means for detecting the presence or absence of silence data recording after the last track number recording section, and silence data for several seconds during stop, rec pause or recording. A rec mute key for pausing after recording is provided, and based on the detection result of the detection means, when silence data is recorded after the last track number recording section by operating the rec mute key, the silence data is recorded. It is configured to prohibit recording.

[0009]

According to the optical disk recording / reproducing apparatus of the present invention, when the rec mute key is pressed when the optical disk is stopped, the track number and index number 00 incremented as subcodes are recorded on the optical disk and silence data are recorded as audio data for several seconds. When the recording start key is depressed continuously, the index number 01 or less is recorded because of the pause, and the recording information of the track number is recorded in the program memory area when recording is stopped.

When the disk is removed from the apparatus in the pause state, the silent end position is not recorded in the program memory area, but when the optical disk is loaded, the silent data is recorded after the last track number recording section. Since it is checked whether or not the data has been recorded, the recording end position of the silent data is detected at that time, and the next recording is performed from that position.

At this time, even if the record mute key is pressed, recording of silence data is prohibited, so that silence data is not repeatedly recorded.

If the record mute key is pressed during recording on the optical disc, the EFM signal of silence data is recorded for several seconds without changing the track number and index number, and the recording is paused. Then, the index number is recorded so as to continue to the previous number, and when the recording is stopped, the recording information of the track number is recorded in the program memory area.

When the disk is removed from the apparatus in the pause state, the silent recording end position is recorded in the program memory area, so that the next recording is performed after the silent data. Not recorded.

[0014]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows WO (Write Once) which is an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a disk recording / reproducing device.
In the figure, reference numeral 1 denotes a WO disk, which is mounted on a tray 2 and is moved above a spindle motor 5 by rotation of a loading motor 3 controlled by a microcomputer 15 and is fixed to a rotating shaft of the spindle motor 5. Clamped to staple.

The spindle motor 5 rotates the WO disk 1, and a focus error signal (FE) and a tracking error signal (TE) are input to the servo circuit 14 from a light receiving element of the optical pickup 6. The servo circuit 14 detects the tracking coil supply current (T
S), and a wobble signal is extracted.

Further, the servo circuit 14 generates a focusing coil supply current (FS) from the focus error signal. The laser spot tracks the pre-groove of the waveform when the current flows through the tracking coil of the actuator of the optical pickup 6, and the focus of the laser spot is adjusted to the signal surface of the WO disk by the current flowing through the focusing coil.

A wobble signal having the same period as the pregroove waveform is input to an ATIP decoder
The (absolute time) signal is demodulated and the microcomputer 1
5 is output. The microcomputer 15 recognizes the position of the laser spot on the WO disk by the ATIP.

Reference numeral 8 denotes a linear motor for feeding the optical pickup 6 in the radial direction of the WO disk. The linear motor 8 is driven by a current (LM) generated from a DC component of a tracking error signal and has a sensor coil for detecting a speed. SC) is fed back to the servo circuit 14.

The wobble signal also indicates the linear velocity of the WO disk, and the servo circuit 1 uses this signal as a reference.
Reference numeral 4 controls the current of the spindle motor 5, and CLV (constant linear speed) control is performed.

The laser diode of the optical pickup 6 is supplied with a current by a laser diode driver 9, and the current is modulated by the output of the EFM encoder 11, and the laser light emitted from the laser diode corresponds to the EFM signal on the WO disk. A pit row is formed.

The EFM encoder 11 has an input terminal 10
The audio digital input (D) or the analog input R channel (R) and L channel (L) are input by selecting a digital input converted by an AD converter (A / D) by a switch and modulated into an EFM signal. You. At that time, the signal input from the microcomputer 15 is incorporated into the subcode of the EFM signal. The EFM
The signal is the laser diode driver 9 as described above.
Modulates the output current.

The microcomputer 15 has a built-in ROM and RAM and controls the entire apparatus. In addition, a signal is input from the keyboard 16, and further, a signal is output to the display 17 to display an operation state of the apparatus. The keyboard 16 includes a recording start key, a recording stop key, and a rec mute key.

The recording operation of the WO disk has been described above. When reproducing the signal recorded on the WO disk, the same operation as that of the CD player is performed. At that time, the laser diode driver 9 outputs a constant current,
The light receiving element of the optical pickup 6 obtains an RF signal, a tracking error signal (TE), and a focus error signal (FE) from the reflected light from the pit row.

The RF signal is amplified and shaped by an RF amplifier (RF), and input to the EFM decoder 12, where the audio digital signal and the subcode are demodulated. The audio digital signal is amplified and waveform-shaped by an amplification / waveform shaping circuit (DO) and output from a D terminal of an output terminal 13. After being processed by a digital filter (DF), it is processed by a DA converter (D / A). Is converted to an analog signal, and further amplified by an amplifier (AO) and output to analog terminals R and L of an output terminal 13. The demodulated subcode is input to the microcomputer 15.

The RF signal is also input to an RF signal detection circuit 18, which outputs a signal indicating the presence or absence of the input signal to the microcomputer 15.

Next, referring to FIG. 2 and FIG.
The recording mute function operation of the disk recording / reproducing apparatus and the operation after disk loading will be described. FIG.
Indicates the operation after disc loading. When the disc loading operation ends, step S1 is executed.

In step S1, it is checked whether or not there is lead-in data on the disk. If it is determined that there is lead-in data, the disk is a CD or a recorded WO disk. And ends this routine.

If it is determined in step S1 that there is no lead-in data, the WO disk is unrecorded or in the middle of recording, and the process proceeds to step S3 to read the recorded contents of the program memory.

Next, in step S4, the last recording position recorded in the program memory is searched, and the routine goes to step S5. In step S5, the part after the search is reproduced to check whether or not the RF signal is output. If the RF signal is output, the process proceeds to step S8. If the RF signal is not output, the process proceeds to step S6.

In step S6, it is determined whether or not a predetermined time has elapsed, and step S5 is repeated until the predetermined time has elapsed. When the predetermined time has elapsed, the process proceeds to step S7. In step S7, the fact that no silence has been recorded after the last track recording end position is stored in the memory of the microcomputer, and this routine ends.

In step S8, it is determined whether or not the track number recorded after the location searched in step S4 is the next number after the last track number recorded in the program memory. Goes to step S9, otherwise, it is an error, and error processing is performed in step S13.

In step S9, it is determined whether or not the index number is "00". If the index number is "00", the process proceeds to step S10. If not, the power is turned off during recording and the program area is recorded. An error such as the end of recording has not been performed, and error processing is performed in step S13.

In step S10, the portion after the searched location is reproduced to check whether an RF signal is output. If an RF signal is output, step S8 is repeated. If no RF signal is output, step S11 is performed. Move to

In step S11, the position information at which the RF signal has ended is stored in the memory of the microcomputer, and the flow advances to step S12. In step S12, the fact that silence has been recorded after the last track recording end position is stored in the memory of the microcomputer, and this routine ends.

In the error processing in step S13, the subsequent recording from the last recording position recorded in the program area is reproduced until the RF signal is no longer present, and the recorded information is recorded in the program memory area of the disk. If the last recording is silent data, the fact that silence is recorded at the final recording position is stored in the memory of the microcomputer, and this routine is terminated.

In this way, when the routine after the disc loading is completed, the information necessary for starting the recording or reproduction is stored in the memory of the microcomputer, and then the operation of recording, reproduction or recording mute is enabled. Becomes

FIG. 3 shows the operation of the rec mute function. When the record mute key is pressed, the program address being executed is stored, and step S1 is executed. In step S1, it is determined whether or not the state before the interruption was recording. If recording was in progress, the process proceeds to step S2, and if not, the process proceeds to step S3.

In step S2, only the audio recording is muted for a few seconds while the track number and index number are kept as they are, and then a rec pause state is returned to the address before the interruption.

In step S3, it is determined whether or not the state before the interruption was the stop state. If the state was the stop state, the process proceeds to step S4, and if not, the process proceeds to step S5.

In step S5, it is determined whether or not the state before the interruption was the rec pause. If the rec pause was in progress, the process proceeds to step S4. If not, the process returns to the address before the interruption.

In step S4, it is determined from the contents stored in the memory in the routine after disc loading shown in FIG. 2 whether or not a silent portion has been recorded after the last track. Returning to the address before the interruption, if no silent section is recorded, step S6
Move to

In step S6, the track number is incremented, a silent section is recorded for several seconds with the index number set to 00, and then a rec pause state is returned to the address before the interruption.

In this way, a silent portion can be arbitrarily formed between different tracks or in the middle of the same track, and it is possible to prevent an overwriting at the same location due to an erroneous operation.

[0044]

According to the optical disc recording / reproducing apparatus of the present invention, a silent section between music pieces can be created by the rec mute function, and double recording can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a WO disk recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation after disk loading in the WO disk recording / reproducing apparatus.

FIG. 3 is a flowchart showing a rec mute function operation in the WO disk recording / reproducing apparatus.

[Explanation of symbols]

 Reference Signs List 1 CD-WO disk 2 tray 3 loading motor 5 spindle motor 6 optical pickup 7 ATIP decoder 8 linear motor 9 laser diode driver 10 input terminal 11 EFM encoder 12 EFM decoder 13 output terminal 14 servo circuit 15 microcomputer 16 keyboard 17 display 18 RF Signal detection circuit

Claims (1)

(57) [Scope of request for utility model registration] 1. An optical disc recording / reproducing apparatus for recording recording information for each track in a program memory area of an optical disc, a search means for searching a pickup after a last track number recording section of the optical disc at the start of recording. A detection means for detecting the presence or absence of recording of silence data after the last track number recording unit, and a rec mute key to pause and then pause after recording silence data for several seconds during rec pause or recording. An optical disk recording / reproducing apparatus configured to prohibit recording of the silent data when silent data is recorded after the last track number recording section by operating the rec mute key based on a detection result of the detecting means.