JP2673063B2 - Optical disk recording and reproducing method - 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 disc recording / reproducing apparatus, and more particularly to a recording / reproducing method suitable for a write-once optical disc.

[0002]

2. Description of the Related Art An optical disk device for recording / reproducing a write-once optical disk performs tracking servo and focus servo by a signal obtained from a pre-groove (waveform track) engraved on the optical disk, and records the laser power of an optical pickup. By modulating with an EFM signal, a pit train is formed on the disc for recording.

The recording area of the optical disk is a power calibration area (PCA), a program memory area,
It is divided into a lead-in area, a program area and a lead-out area, and their positions are defined by the absolute time (ATIP) of FM modulation of the wobble signal.

The PCA is an area for calibrating the laser power of the optical pickup and is arranged in the innermost circumference. The program memory area is an area for recording the recorded part number and the absolute time indicating the recording position, and is arranged outside the PCA. The program area is an area for recording arbitrary data, and a lead-in area and a lead-out area are arranged on the inner and outer peripheral sides thereof, respectively. The lead-in area is a CD after the recording on the optical disc is completed.
Like a disk, this is an area in which TOC (Table of Content) is written and is adjacent to the outer peripheral side of the program memory area.

Conventionally, in the search of an arbitrary place for one tune at the time of reproduction, by pressing a switch during recording of the program area, the track number of the sub-code included in the recording signal is increased by one, and the search of the program area is performed. It was possible only by dividing the recording of one song by track number.

[0006]

According to the conventional optical disk recording method described above, it is possible to specify a search location during recording of one song. However, for example, a search is performed later on a partially recorded optical disk recorded by absence recording. It is impossible to specify the location. In addition, it is impossible to change the once specified search location later.

The present invention has been made in view of the above points, and an object of the present invention is to record an optical disc on which a search location can be designated later on an optical disc on which partial recording has been performed in absence recording. It is to provide a reproduction method.

Another object of the present invention is to provide a recording / reproducing method for an optical disc, which is capable of later changing the search location of the partially recorded optical disc which has been designated once.

[0009]

According to the optical disc recording method of the present invention, a partially recorded optical disc in which substantially the entire program area is recorded by one song is reproduced, and a delimiter signal is input to the optical disc device during reproduction. The recording part is divided into part numbers at the place where the delimiter signal is input, and the start time of each part number is stored in the memory, and the start time of each part number stored in the memory after the reproduction is finished is recorded on the optical disc. It is recorded in the program memory area of.

Further, the partially recorded optical disc in which the program memory area is recorded by the optical disc recording method is reproduced again, a delimiter signal is input to the optical disc device during reproduction, and a part number of the place where the delimiter signal is inputted. The signal for canceling the recording of and the place where the delimiter signal is input are stored in the memory as the start time of the part number, and the part number stored in the memory can be canceled after the replay is finished. The new start time of the part number is recorded after the cancellation symbol is recorded in the program memory area of the optical disc.

Further, the partially recorded optical disc in which the program memory area is recorded by the optical disc recording method is reproduced again, a delimiter signal is input to the optical disc device during reproduction, and a signal after the place where the delimiter signal is input is inputted. A signal for canceling the recording of the part number and the place where the delimiter signal is input are stored in the memory as the start time of the subsequent part number, and the memory is stored in the memory to cancel after the reproduction is finished again. After the part number is recorded in the program memory area of the optical disc together with the cancel symbol, the new start time of the part number is recorded.

Further, the partially recorded optical disc in which the program memory area is recorded by the optical disc recording method is reproduced again, a delimiter signal is input to the optical disc device during the re-reproduction, and at the place where the delimiter signal is input. The recording part is divided again into part numbers and the start time of each part number is stored in the memory, and after the replay is completed, the start time of each part number recorded before the replay is canceled. The contents are recorded in the program memory area of the optical disk, and then the new start time of each part number stored in the memory is recorded during the reproduction again.

Further, at the time of the recording completion processing, the start time of each latest part number recorded in the program memory area by the above method is recorded in the TOC.

According to the optical disc reproducing method of the present invention, the part number is input to the optical disc device when the optical disc having the program memory area or TOC recorded by the above methods is reproduced, and the start time of the inputted part number is stored in the program memory. The start position of the part number is searched by reading from the area or the TOC record.

[0015]

According to the optical disk recording and reproducing method of the present invention, the start time of each part number divided by the delimiter signal input during the reproduction of the partially recorded optical disk is recorded in the program memory area or TOC. By reading those records, it becomes possible to specify the search location after the recording.

Further, by canceling the designated search location later and recording the newly designated search location in the program memory area,
The search location designated as described above can be changed.

[0017]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the structure of a CD-WO disk device for carrying out the present invention. In the figure, 1
Is a CD-WO disc, which is clamped on a turntable fixed to the rotary shaft of the spindle motor 2.

The spindle motor 2 rotates the CD-WO disk 1, and the light receiving element of the optical pickup 3 causes a focus error signal (FE) and a tracking error signal (T).
E) is input to the servo circuit 4. The servo circuit 4 generates a tracking coil supply current from the tracking error signal and also extracts a wobble signal (WB).

Further, the servo circuit 4 generates a focusing coil supply current from the focus error signal. The laser spot traces the pre-groove of the waveform when the current is applied to the tracking coil of the actuator of the optical pickup 3, and the focus of the laser spot is focused on the CD-W by the current applied to the focusing coil.
It is adjusted to the signal surface of the O disk.

A wobble signal (WB) having the same period as the waveform of the pre-groove is input to the ATIP decoder 6.
The TIP (absolute time) signal is demodulated and output to the microcomputer 12. With this ATIP, the microcomputer 12 recognizes the position of the laser spot on the CD-WO disc.

The optical pickup 3 is sent in the radial direction of the CD-WO disc by a linear motor (not shown). The linear motor is supplied from the servo circuit 4 with a current generated from the DC component of the tracking error signal during normal recording or reproduction. Further, the laser spot of the optical pickup 3 is instructed from the microcomputer 12 by the actuator 12 and the linear motor.
It can be moved to any position on the D-WO disc.

The wobble signal (WB) is also a CD-W.
The linear velocity of the O disk is shown, and the CLV circuit 5 controls the current of the spindle motor 2 on the basis of this signal.
CLV (constant linear velocity) control is performed.

A current is supplied to the laser diode of the optical pickup 3 by a laser diode driver 7. The current is modulated by the output of the EFM encoder 11, and the laser light emitted from the laser diode is CD-W.
A pit row corresponding to the EFM signal is formed on the O disk.

The EFM encoder 11 has an optical input terminal 8
Either the digital signal obtained by converting the optical signal input from the optical converter 9 by the photoelectric converter 9 or the digital input obtained by converting the analog input by the AD converter 10 is selected and input and EF
Modulated into M signal. At that time, the signal input from the microcomputer 12 is incorporated into the subcode of the EFM signal. The EFM signal modulates the output current of the laser diode driver 7 as described above.

The microcomputer 12 has a built-in ROM and RAM and controls the entire apparatus. In addition, a signal is input from the keyboard 13, and the display 14
A signal is output to display the operating status of the device.

The recording operation of the CD-WO disc has been described above, but when the signal recorded on the CD-WO disc is reproduced, the same operation as that of the CD player is performed.
At that time, the laser diode driver 7 outputs a constant current, and the light receiving element of the optical pickup 3 receives the RF signal and the tracking error signal (T
E) and a focus error signal (FE) are obtained.

At this time, the signal obtained by the light receiving element of the optical pickup 3 is amplified and shaped by the RF amplifier 15 and input to the EFM decoder 16, where the audio digital signal and the sub code are demodulated. The audio digital signal is converted into an analog signal by the AD converter 17 and output as an analog audio signal. Further, the audio digital signal output of the EFM decoder 16 is converted into a digital optical signal by the electro-optical converter 18 and output from the optical output terminal 19. Further, the demodulated subcode is input to the microcomputer 12.

Next, referring to FIGS. 2 and 3 and Tables 1 and 2, the operation of designating the search location of the apparatus will be described. First, in FIG. When the program area of the CD-WO disc 1 shown as area 1 is recorded by the absence recording, the contents shown in the block of Table 1 are recorded in the block of the program memory area of FIG.

Each display of A to H in Table 1 shows a two-digit hexadecimal number recorded as a subcode of the EFM signal in a fixed order in each block of the program memory area. In block A = 01, B = 01, the end time of the entire recording is recorded in C, D, and E as minutes, seconds, and a 2-digit hexadecimal number as the frame number, and the start time of the entire recording is F, G, and E. It is indicated that H is recorded in the hexadecimal two-digit number as the minute, second, and frame number, respectively.

The designation of the search location is carried out by playing back the CD-WO disc recorded as described above while displaying the C shown in FIG.
P-NO. 1-PNO. This is performed by inputting a delimiter signal at the boundary of 5. At this time, the microcomputer stores the absolute time at which the delimiter signal was input in the RAM, and after reproduction is completed, the contents shown in blocks 1 to 4 of Table 1 are shown. It is recorded in blocks 1 to 1 of the program memory area.

At this time, the numeral B indicates each part number, and the recording end time of the part number is C, D, E.
Are recorded as minutes, seconds, and frame numbers, respectively. Also,
The recording start time of the part number is recorded in F, G, and H as minutes, seconds, and frame numbers, respectively.

In order to change the search location designated in this way, the PNO. Of the CD-WO disc 1 shown in FIG. 3 is reproduced while the CD-WO disc recorded as described above is reproduced again.
1 and PNO. It is carried out by inputting a delimiter signal at the boundary between the two. At this time, the microcomputer stores the absolute time at which the delimiter signal is input in the RAM, and after reproduction is completed, the contents shown in blocks 1 to 4 of Table 1 are shown. It is recorded in blocks 2 to 2 of the program memory area.

At this time, A = 08 indicates that the part number for which this block is canceled is recorded, and B = B.
Indicates the number of times. The canceled part numbers are recorded in C to H, respectively. In this example, PNO. 1 and PNO. This indicates that the recorded contents of the second program memory area are canceled. Block and the new PNO. 1 and PNO. 2 shows the content, and its meaning is the same as that described above. By reading the contents of the program memory area recorded in this way, the recording start position of each part number can be searched.

When the recording completion process is performed, the contents shown in Table 2 are recorded as TOC in the lead-in area of FIG. At this time, the latest information of the part number recorded in the program memory area is recorded.

Table 2 shows that the number of the first track number is recorded in F as 01. Table 2 shows that the number of the last track number is recorded as 01 in F.

In Table 2, the lead-out start time is F,
It shows that it is recorded in G and H as minutes, seconds, and frame numbers, respectively. In Table 2, the start times of songs are F, G, and H.
Indicates that the data is recorded as minutes, seconds, and frame numbers, respectively. Table 2 indicates that the number of part numbers is shown in C as 05.

The circled numbers 10 in Table 2 are PNO. 1-PN
O. 5, the recording start time is recorded in F, G, and H as minutes, seconds, and frame numbers, and the recording end time is recorded in C, D, and E as minutes, seconds, and frame numbers, respectively. Thus, when the TOC is recorded, the search is performed by reading the TOC.

[0038]

[Table 1]

[0039]

[Table 2] Although the embodiment is configured as described above, the invention is not limited to this. For example, by canceling all the contents of all previously recorded part numbers and recording the contents of a new part number, the search location Can be changed entirely.

[0040]

According to the optical disk recording and reproducing method of the present invention, it is possible to specify the search location later on the partially recorded optical disk recorded by voice mail, and the partially recorded optical disk once specified. It is possible to change the search location of the later. Therefore, one disk can be used very conveniently.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a CD-WO disk device used in an embodiment of the present invention.

FIG. 2 is a diagram showing a recording portion of the CD-WO disc device in the embodiment.

FIG. 3 is a diagram showing a recording portion of the CD-WO disc device in the embodiment.

[Explanation of symbols]

 1 CD-WO Disk 2 Spindle Motor 3 Optical Pickup 4 Servo Circuit 5 CLV Circuit 6 ATIP Decoder 7 Laser Diode Driver 8 Optical Input Terminal 9 Photoelectric Converter 10 AD Converter 11 EFM Encoder 12 Microcomputer 13 Keyboard 14 Display 15 RF Amplifier 16 EFM decoder 17 AD converter 18 Electro-optical converter 19 Optical output terminal

Claims (6)

(57) [Claims] 1. A partially recorded optical disc in which almost the entire program area is recorded as one song is reproduced, a delimiter signal is input to the optical disc device during reproduction, and the recorded portion is recorded at the place where the delimiter signal is inputted. An optical disc characterized in that the start time of each part number is divided into part numbers and is stored in a memory, and the start time of each part number stored in the memory is recorded in a program memory area of the optical disc after the reproduction is completed. Recording method. 2. The partially recorded optical disc in which the program memory area is recorded by the method of claim 1, is reproduced again, and a delimiter signal is input to the optical disc device during reproduction.
A signal for canceling the recording of the part number at the place where the delimiter signal is input and a place where the delimiter signal is input are stored in the memory as the start time of the part number, and the cancel is performed after the replay is completed. A recording method for an optical disc, wherein a part number stored in the memory is recorded together with a cancel symbol in a program memory area of the optical disc, and then a new start time of the part number is recorded. 3. The partially recorded optical disc in which the program memory area is recorded by the method of claim 1, is reproduced again, and a delimiter signal is input to the optical disc device during reproduction.
A signal for canceling the recording of the part number after the place where the delimiter signal is input and a place where the delimiter signal is input are stored in the memory as the start time of the subsequent part number, and the replay is finished. A recording method for an optical disc, comprising recording a part number stored in a memory with a cancel symbol in a program memory area of the optical disc and then recording a new start time of the part number. 4. The partially recorded optical disc in which the program memory area is recorded by the method according to any one of claims 1 to 3 is reproduced again, and a delimiter signal is input to the optical disc device during the reproduction, and the delimiter signal is input. At the specified location, the recorded part is divided again into part numbers and the start time of each part number is stored in memory, and after the end of the replay, the start of each part number recorded before the replay. A method for recording an optical disk, characterized in that the content for canceling the time is recorded in a program memory area of the optical disk, and then a new start time of each part number stored in the memory is recorded during the replay. 5. A recording method for an optical disc, wherein the start time of each latest part number recorded in the program memory area by the method according to any one of claims 1 to 4 is recorded in the TOC during the recording completion processing. . 6. When reproducing the program memory area or the optical disk having a TOC recorded thereon by the method according to any one of claims 1 to 5, the part number is input to the optical disk device, and the start time of the input part number is stored in the program memory area. Alternatively, a method of reproducing an optical disc in which the start position of the part number is searched by reading from the TOC recording.