JP2768584B2 - 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 an optical disk recording / reproducing apparatus for recording or reproducing a signal in which time information is incorporated as a subcode into a recording signal, such as a CD format, on an optical disk. The present invention relates to an optical disk recording / reproducing apparatus suitable for duplicating recording information of an optical disk in which recording start time and recording end time of each track are recorded in an area or a program memory area.

[0002]

2. Description of the Related Art In a conventional optical disk recording / reproducing apparatus, for example, a WO disk recording / reproducing apparatus, 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, and 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.

When the recording of the WO disk is completed, a recording corresponding to the TOC (table of contents) of the CD is created from the recording in the program memory area and recorded in the lead-in.

When a WO disk during recording is loaded, the recording in the program memory area is read, and the recording of the next track is performed from the position of the last recording time recorded on the WO disk.

[0005] In the recording end process, TO-in is performed for lead-in based on the information recorded in the program memory area.
C is recorded.

When information recorded on a CD or a WO disk is recorded on a WO disk using such a WO disk recording / reproducing apparatus, a change in track number is determined by the following method. Was.

A first method is that an operator monitors an optical disk reproducing apparatus for reproducing a CD or WO disk during recording, and operates a WO disk recording / reproducing apparatus every time a displayed track changes, thereby recording a track number. Is incremented by one.

According to such a method, the operator cannot leave the apparatus during the recording, and there is a risk that the recording may fail due to an operation error.

In a second method, a digital signal to which a sub-code is added by a digital audio interface is output from an optical disk reproducing device, input to a WO disk recording / reproducing device, and is present on an input signal by the WO disk recording / reproducing device. Each time the subcode is read and the track number changes, the track number of the subcode to be recorded is set to 1
It is a method to increase by one.

According to this method, the track number can be surely changed. However, usually, a subcode is often not added to the digital signal output from the optical disk reproducing apparatus. In such a case, the track number cannot be changed by the subcode information.

A third method is to change the track number at the rising edge of the next audio signal when the state in which the audio signal level included in the input signal is below a certain level continues for several seconds. With this method, it is difficult to set the audio signal level, and the track number changes because the audio signal below the set level persists for several seconds despite the middle of the track, or the track number changes because the audio signal level does not fall below the set value There is a problem that the operation is unstable, for example, the operation is not performed.

[0012]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to provide a copy destination optical disc by using it in combination with an ordinary optical disc reproducing apparatus. An object of the present invention is to provide an optical disk recording / reproducing apparatus capable of duplicating an optical disk while recording information with a correct track number.

[0013]

According to the present invention, there is provided an optical disk recording / reproducing apparatus for recording / reproducing an EFM signal incorporating a subcode including absolute time information indicating a recording position on / from an optical disk. The source optical disc is reproduced, the recording start time of each track recorded on the source optical disc and the end time of the last track are stored in a memory, and a signal reproduced from the source optical disc by the optical disc reproducing apparatus is recorded on the destination optical disc. The absolute time of the track number change position and the record end position are calculated from the recording start time and the end time of the last track stored in the memory and the recording start time of the copy destination optical disk, and the track number change is performed. Each time the signal passes through the absolute time of the position, Kkunanba increased by 1, further, which is constituted so as to terminate the recording in the absolute time of recording end position.

[0014]

Since the recording time of each track to be duplicated is the same for the original optical disk and the destination optical disk, the time between the absolute recording start time of the original optical disk and the absolute start time of each track is calculated. The time obtained by adding the absolute time of the start of duplication of the duplication destination optical disk becomes the absolute time indicating the track number change position on the duplication destination optical disk, and the time between the absolute recording start time of the duplication source optical disk and the absolute end time of the last track The time obtained by adding the absolute time of the copy start of the copy destination optical disk to the time is the copy end absolute time.

The track number change absolute time and the duplication end absolute time are calculated from the recording start time and the last track end time of each track of the duplication source optical disk and the duplication start absolute time of the duplication destination optical disk stored in the memory. Then, while detecting the absolute time at the time of recording on the optical disk, the track number at the start of duplication is determined so as to follow the track number already recorded on the optical disk of the duplication destination, and the track number is set to 1 at the track number change absolute time. When the recording is completed at the duplication absolute time, the track number is incremented by one for each track as a subcode incorporated in the recording information.

[0016]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a WO (Write Once) according to 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 the table.

The WO disk has a power calibration area, a program memory area, a lead-in area,
A program area and a lead-out area are sequentially arranged from the inner circumference, and an absolute time using a wave pitch as a signal is recorded by a pre-groove of a waveform.

The power calibration area is an area for calibrating the power intensity of the laser diode before recording. The program memory area is an area in which recording information is recorded every time each track is recorded in the program area. When a WO disk during recording is loaded, its contents are read and used like a TOC at the time of reproduction. When recording is started, it is used for data for determining a recording start position and a next track number.

The program area is an area starting from the absolute time 00, and each track (song) is sequentially recorded. When recording of all tracks is completed, an end process is performed,
TOC is written in the lead-in area, and AA is written in the lead-out area as a subcode track number.

The spindle motor 5 rotates the WO disk 1, and a focus error signal (FE) and a tracking error signal (TE) are input from the light receiving element of the optical pickup 6 to the servo circuit 14. 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.

The wobble signal having the same cycle as the pregroove waveform is input to the ATIP
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
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 the laser diode driver 9 and the current is modulated by the output of the EFM encoder 11 so that 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 is provided with keys for performing various operations such as recording, reproduction, and end processing.

Although 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.

Next, an operation of copying an optical disk in the WO disk recording / reproducing apparatus will be described with reference to FIGS.

FIG. 2 is a flowchart showing the operation of copying the optical disk in the WO disk recording / reproducing apparatus. As for the operation of copying an optical disk, first, in step S
At 1, a recorded optical disk serving as a copy source optical disk is inserted into the apparatus.

Next, in step S2, the recorded contents of the program memory area or TOC of the recorded optical disk are read, and the recording start time of each track and the recording end time of the last track are read by the microcomputer 15
Is stored in the memory.

Next, in step S3, the recorded optical disk is taken out of the apparatus, and in step S4, a recordable WO disk serving as a copy destination optical disk is inserted into the apparatus.

Next, the W inserted in step S5
It is determined whether the O disk is an unrecorded disk,
If the disc is an unrecorded disc, the process proceeds to step S7. If the disc is a WO disc in the middle of recording, the recorded contents of the program memory area are read in step S6, and the recording end time and the track number of the last recorded track are set. The process is stored in the memory of the microcomputer 15 and the process proceeds to step S7.

In step S7, a key operation on the keyboard 16 is performed, and a command to start duplication is input. Before that, the copy source optical disk is inserted into the optical disk reproducing apparatus and is paused at the head position of the information recording area, and its audio digital signal output terminal is connected to the audio digital input terminal (D )It is connected to the. The audio analog output terminal of the optical disk reproducing device may be connected to the analog input R channel (R) and L channel (L) terminals.

Next, in step S8, it is determined whether or not the command input from the keyboard is a copy command. If the command is not a copy command, the process proceeds to step S16, where other processing is performed. Step S
Move to 9.

In step S9, a track number obtained by adding 1 to the track number of the last track of the copy destination optical disk is set, and recording is started. At this time, the pause of the optical disc reproducing apparatus in which the copy source optical disc is inserted is also released.

Next, in step S10, it is determined whether or not the recording is to be ended on the track currently being recorded. The track number of the track at which recording ends is the number obtained by adding the number of tracks already recorded on the copy destination WO disk and the number of tracks recorded on the copy source optical disk.

If it is determined in step S10 that the recording is to be ended on the track currently being recorded, step S14 is performed.
Otherwise, the process proceeds to step S11.

In step S11, the difference between the start time of the first track of the copy source optical disk stored in the memory and the start time of the next track to be reproduced is calculated, and the difference is calculated as the recording start time of the copy destination optical disk. This sets the start time T _next of the _next recording track.

Next, in step S12, the WO being recorded is
_Repeat the comparison of the absolute time T _now and T _next of the disc,
When the absolute time T _now of the WO disk being recorded becomes equal to T _next , the process proceeds to step S13.

In step S13, the track number added to the sub-code of the recording signal is incremented by 1, and the process proceeds to step S10.

In step S14, the difference between the start time of the first track and the end time of the last track of the copy source optical disk stored in the memory is calculated, and the difference is added to the recording start time of the copy destination optical disk. And the recording end time _Tend .

Next, in step S15, the WO being recorded is
_Repeat the comparison between the absolute time T _now and T _end of the disc,
When the absolute time T _now of the WO disk being recorded becomes equal to T _end , the copying operation of the optical disk is terminated.

FIG. 3 shows the relationship between the change position of the track number of the copy source optical disk and the change position of the track number of the copy destination optical disk when copying is performed in this manner.
(A) and (b).

As shown in FIG. 3A, the track number of each track in the copy source optical disk is represented as Nn. The absolute time indicating the start position of the track number Nn is Tn, and the end time of the last track is T _end .

As shown in FIG. 3B, the track number of each track in the copy destination optical disk is expressed as Nn '. The absolute time indicating the start position of the track number Nn 'is Tn', and the end time of the last track is T _end '. The absolute time Ts of the copy start position of the copy destination optical disk is equal to T ₁ '. further,
_{Tn' = T s + T n -T} 1 and _{T end '=} T s + T
_{end The} -T ₁ relationship there is a and the number of tracks that have already been recorded in the copy destination disc and _{N N n '= N + N} n. Here, N is the number of tracks already recorded on the copy destination optical disk.

Although the embodiment is constructed as described above, the invention is not limited to this. For example, as a copy destination optical disk, instead of a WO disk, a track number and an absolute time are incorporated as subcodes and recorded information and Other types of recordable optical disks can be used as long as they are recorded simultaneously.

At the start of recording in step S9, a pause release signal may be output to the optical disk reproducing apparatus. Further, after step S15, the lead-out and lead-in areas are continuously recorded, and recording end processing is performed. You may do so.

[0050]

According to the optical disk recording and reproducing apparatus of the present invention, when duplicating information recorded on an optical disk,
The track number of the recording signal subcode automatically changes at the track time interval of the duplication source optical disk.

Therefore, there is no need to check the change time of each track in advance or manually change the track number while actually listening.

Since the recording end time is also stored in the computer in advance, it is possible to use this to end the recording automatically or to continue the lead-in / lead-out recording. This eliminates the need for a human to monitor and end the recording.

Furthermore, the track number can be changed more accurately and more reliably than the judgment based on the input level change, and the above-mentioned track number can be automatically changed even when the subcode information is not added to the digital audio interface. Therefore, there is no restriction on use depending on the optical disc reproducing apparatus used in combination.

[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 optical disk copying operation in the WO disk recording / reproducing apparatus.

FIG. 3A is a diagram showing a change position of a track number of a copy source optical disk when duplicating an optical disk using the WO disk recording / reproducing apparatus, and FIG. FIG. 11 is a diagram showing a change position of a track number of a copy destination optical disk when copying an optical disk using a reproducing apparatus.

[Explanation of symbols]

 Reference Signs List 1 CD-WO disc 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

Claims (1)

(57) [Claims] 1. An optical disk recording / reproducing apparatus for recording and reproducing an EFM signal incorporating a subcode including absolute time information indicating a recording position on and from an optical disk. The recording start time and the end time of the last track are stored in a memory. Then, when a signal reproduced from the source optical disc by an optical disc reproducing apparatus is recorded on a destination optical disc, the recording of each track stored in the memory is performed. The absolute time of the track number change position and the recording end position are calculated from the start time, the end time of the last track, and the recording start time of the copy destination optical disc, and are incorporated into the recording signal every time the absolute time of the track number change position is passed. The subcode track number is incremented by one, and the recording end position An optical disc recording / reproducing apparatus configured to end recording at an absolute time of the optical disc.