JPH0528496A - Optical information recording medium and recording method of audio and image information - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a method of recording audio and image information on an optical disc, which enables after-recording of audio. [Structure] Immediately after the laser power setting area 1, the audio first
The audio information recording areas are collectively arranged such that the channel information recording area 2, the audio second channel information recording area 4, the audio third channel information recording area 6, and the audio fourth channel information recording area 8 are arranged, and finally, By using the recording format in which the image information recording area 10 is arranged,
After setting the recording power in the laser power setting area 1,
It can be said that the audio information recording areas 2, 4, 6 and 8 are recorded, and the image information recording area is scanned by the reproduction power, and only the audio can be after-recorded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method and an optical information recording medium for recording information such as audio and image information on an optical information recording medium such as an optical disk by using a semiconductor laser beam or the like. is there.

[0002]

2. Description of the Related Art A technique for recording and reproducing high-density information on an optical information recording medium such as an optical disk using a laser beam is widely known, and a device capable of recording voice and image information is now in practical use. ing.

An example of a conventional method of recording audio and image information on an optical disc will be described below with reference to the drawings.

FIG. 11 shows an optical disk used in a conventional audio and image information recording system.
In FIG. 11, reference numerals 114 and 115 denote address portions which are preliminarily marked with uneven pits. Reference numeral 116 denotes a track, which is spirally engraved on the optical disk, and a light spot scans the track to record and reproduce information.

The optical disk shown in FIG.
By rotating, one frame of an NTSC image is recorded in one rotation. That is, the first field is recorded in the first half rotation portion (A) of the track 103, and the second field is recorded in the next half rotation portion (B).

FIG. 12 (a) shows a recording format used in a conventional recording method of audio and image information on an optical disc.

In the first field, following the address 101, an LPC area 117 for setting the laser power to a desired value is arranged, followed by an area A1 (118) for recording the audio first channel, a gap 119, Area A2 (120) for recording the second audio channel,
Gap 121, area VIDEO for recording image information
(122), gap 123, area A3 (124) for recording audio third channel, gap 125, area A4 (126) for recording audio fourth channel
In that order.

Similarly, in the second field, the address 128
Followed by L to set the laser power to the desired value
A PC area 129 is arranged, followed by an area A1 (130) for recording the first audio channel and a gap 13.
1. Area A2 (1 for recording the audio second channel
32), the gap 133, and an area VI for recording image information
DEO (134), gap 135, area A3 (136) for recording audio third channel, gap 13
7. Area A4 (1 for recording audio channel 4)
38).

The necessity of the LPC areas 117 and 129 will be described. When recording on an optical disc, it is necessary to set the optical power to an optimum recording power value. The semiconductor laser is a current-driven element, and the optical output is controlled by the operating current. The operating current characteristic with respect to this optical output has a large temperature dependency, so even if the operating current is set to a constant value,
Constant optical power is not always available. Therefore, to set the optimum recording power value, monitor the optical output, control the operating current so that the value is the required power value, and set the operating current corresponding to the optimum power. It needs to be done before recording. Since this work takes a certain amount of time, the dedicated LPC areas 117, 1
29 is required.

The semiconductor laser has been described above. However, since the light output of other light sources may change depending on the surrounding environment, the LP
C areas 117 and 129 are necessary.

FIG. 12B shows a laser waveform when the above format is recorded on a phase change rewritable recording medium. In the phase-change rewritable recording medium, the optical output is modulated between two power levels (bias power and peak power) higher than the reproduction power, and recording is performed at peak power while erasing with bias power.

First, in the LPC area 117, the reproduction power PR is set to the bias power PB and the peak power PP is set. After that, the laser power is modulated according to the audio information and the image information, and recording is performed.

[0013]

Now, as a usage form of voice and image information, there is so-called after-recording in which only voice is later re-recorded for previously recorded information. In this after-recording, the conventional recording format had the following problems.

Consider performing this after-recording with the conventional recording format shown in FIG. 12 (a). The laser emission waveform at that time is shown in FIG.

In the LPC area 117, the reproduction power PR is set to the bias power PB and the peak power PP is set (section C).

Next, audio first channel information, audio second channel information
Light modulation is performed according to the channel information, and new recording is performed afterward (section D).

Since it is necessary to keep the next image information as it is, in the image information recording area 122, the reproduction power is returned to (E section).

Next audio third channel recording area 124,
Although it is desired to perform recording in the audio fourth channel recording area 126, the laser power has already returned to the reproduction power and the power cannot be set because there is no LPC area.
Audio channels 3 and 4 cannot be recorded (section F).

As described above, the recording method using the conventional recording format has a problem that the after-recording of the sound cannot be sufficiently performed.

In view of the above problems of the recording method of the conventional recording format, the present invention provides a method of recording information on an optical information recording medium and an optical information recording medium which can be after-recorded.

[0021]

According to the present invention, recording of audio and image information is performed using a recording format in which an area for recording audio information is provided immediately after an area for setting the power of a light beam to a desired value. Is a recording method for performing.

[0022]

According to the present invention, since there is an area in which audio information can be recorded immediately after the laser power setting area according to the above configuration, it is possible to record only the audio information after setting the recording power in the laser power setting area. Yes, audio after-recording is possible.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows a recording format of a recording method of audio and image information in an embodiment of the present invention. The recording method of the present invention uses the conventional optical disc shown in FIG.

In the first field, an LPC area 1 for setting a laser power to a desired value is arranged following the address 101, and subsequently, an area A1 (2) for recording audio first channel information and a gap 3 are arranged. , Area A2 (4) for recording audio second channel information, gap 5, audio third
Area A3 (6) for recording channel information, gap 7, area A4 for recording audio fourth channel information
(8), gap 9, area VIDE for recording image information
The order is O (10).

Similarly for the second field, the address 102
Followed by L to set the laser power to the desired value
A PC area 12 is arranged, followed by an area A1 (13) for recording audio first channel information, a gap 14, an area A2 (15) for recording audio second channel information, a gap 16, and an audio third channel information. Area A3
(17), the gap 18, the area A4 (19) for recording the audio fourth channel information, the gap 20, and the area VIDEO (21) for recording the image information.

FIG. 2 is a block diagram of an optical recording / reproducing apparatus for recording according to the recording format of FIG. In FIG. 2, reference numeral 23 is an optical head, which forms a light spot on the optical disc 24 to perform recording and reproduction.

A reproducing amplifier 25 amplifies a reproduced signal.

Reference numeral 26 is a binarization circuit, which binarizes the reproduction signal and outputs reproduction data.

An address reading circuit 27 reads information such as a frame number from the reproduction data of the address section 101.

Reference numeral 28 denotes a recording frame detection circuit, which has a recording start frame number FS (2
9), the recording end frame number FE (30), and the current frame number FX sent from the address reading circuit 27.
(31) is compared, and when FS ≦ FX ≦ FE, WT
The EN signal (32) is output.

Reference numeral 33 denotes a recording gate generation circuit, which outputs each gate signal required for recording when the recording frame detection circuit 28 outputs the WTEN signal (32).
That is, the BSGT signal (35), the WTGT signal (36), and the PKHD signal (3
7) is output and the buffers 49, 50, 51, 52, 53 are output.
For the ENA1 signal (38), ENA2 signal (3
9), ENA3 signal (40), ENA4 signal (41),
The ENV signal (42) is output. Moreover, each gate signal is changed according to the after-recording ON / OFF signal (34).

A semiconductor laser drive circuit 48 drives the semiconductor laser to perform recording / reproduction.

Reference numeral 49 is a voice first channel information buffer, which outputs information when the ENA1 signal (38) is at H level.

Reference numeral 50 denotes a voice second channel information buffer which outputs information when the ENA2 signal (39) is at H level.

Reference numeral 51 is a buffer for audio third channel information, which outputs information when the ENA3 signal (40) is at H level.

Reference numeral 52 is a buffer for the audio fourth channel information, which outputs information when the ENA4 signal (41) is at H level.

Reference numeral 53 is an image information buffer, which is ENV.
Information is output when the signal (42) is at the H level.

FIG. 3 shows the semiconductor laser drive circuit 48 of FIG.
FIG.

Reference numeral 55 is a semiconductor laser. A photodetector 56 receives the output light of the semiconductor laser 55 and generates a current.

The operational amplifier 57 converts the received light current into a voltage to generate an optical power control error voltage PDER (58).

Reference numeral 59 is a first closed loop system control means,
The operational amplifier 60 is configured to compare and output the optical power control error signal PDER (58) and the first reference voltage V1 (61), and output the first control voltage SV1 (62).

Reference numeral 63 is a first reference voltage generating means, which is B
When the SGT signal (35) is at the L level, the switch 64 is turned off and the switch 65 is turned on to output the reference voltage VP (66) for outputting the reproducing power, and when the BSGT signal (35) is at the H level. Turns on the switch 64 and turns off the switch 65, and outputs the reference voltage VB (67) for outputting the bias power. In this way, the first reference voltage V1 (61) is output.

Reference numeral 68 denotes a first sample and hold means, which holds an input first control voltage value SV1 (62) by an operational amplifier 69 and a capacitor 70 and outputs a first hold voltage HD1 (71). .

The switch 72 receives the WTGT signal (36) at the L level.
It is turned on when it is at the level, and turned off when it is at the H level.

The transistor 73 has a first hold voltage H.
D1 (71) is input to the base to drive the semiconductor laser 55 with current.

74 is a second closed loop system control means,
Comprised of operational amplifier 75, WTGT signal (36)
Is at H level, optical power control error signal PDER
(58) and the reference voltage VP for outputting the peak power
The second control voltage SV2 (77) is output by comparing and outputting (76).

Reference numeral 78 denotes a second sample hold means, which holds an input second control voltage value SV2 (77) by an operational amplifier 79 and a capacitor 80 and outputs a second hold voltage HD2 (81). .

The switch 82 outputs the PKHD signal (37) to the L level.
It is turned on when it is at the level, and turned off when it is at the H level.

The transistor 83 has a second hold voltage H.
D2 (81) is input to the base to drive the semiconductor laser 55 with current.

Reference numeral 84 is an optical pulse modulating means, which is WTDT.
In response to the signal (54), the transistors 85 and 86 perform differential switching, and the current flowing through the transistor 83 is turned on / off so that it flows through the semiconductor laser 55.

FIG. 4 is an operation waveform diagram when voice after-recording is performed by the recording method of the present invention. Next, this operation will be described.

FIG. 4A shows a recording format.

The recording frame detection circuit 28 uses the address 1
It is detected that the frame numbers 01 and 102 are frames to be recorded, and the WTEN signal is output as shown in FIG. 4B.

The recording gate generation circuit 33 outputs the WTEN signal and turns ON / OFF the after-recording.
When it is detected that the OFF signal is ON, for example, in the case of the first field, each gate signal is output as follows.

The BSGT signal is set to the H level from the beginning of the LPC area (1) to the end of the audio fourth channel information recording area A4 (8) (FIG. 4 (c)).

The WTGT signal is set to H level from the middle of the LPC area (1) to the end of the audio fourth channel information recording area A4 (8) (FIG. 4 (d)).

The PKHD signal is set to H level from the end of the LPC area (1) to the end of the audio fourth channel information recording area A4 (8) (FIG. 4 (e)).

The ENA1 signal is set to the H level only in the audio first channel information recording area A1 (2) (see FIG. 4).
(F)).

The ENA2 signal is set to the H level only in the audio second channel information recording area A2 (4) (FIG. 4).
(G)).

The ENA3 signal is set to the H level only in the audio third channel information recording area A3 (6) (see FIG. 4).
(H)).

The ENA4 signal is set to the H level only in the audio fourth channel information recording area A4 (8) (see FIG. 4).
(I)).

The ENV signal is kept at L level (FIG. 4 (j)).

Therefore, the WTDT signal becomes as shown in FIG.

The semiconductor laser emission waveform (FIG. 4 (l)) based on the above signals will be described below.

(T1 section) Since the WTGT signal is at L level, the first closed loop system control 59 is operating.
Since the BSGT signal is at the L level, the switch 65 is turned on.
Then, the first reference voltage V1 (61) becomes the reference voltage VR (66) for outputting the reproducing power, and the transistor 73 causes a current for emitting the reproducing power to flow through the semiconductor laser 55. Further, since the WTDT signal is at the L level, the transistor 85 is ON and the transistor 86 is O.
The semiconductor laser 55 does not flow through the semiconductor laser 55 because of the FF. Therefore, the semiconductor laser 55 emits light with reproducing power.

(T2 section) Since the WTGT signal is at the L level, the first closed loop system control 59 is operating.
Since the BSGT signal is at the H level, the switch 64 is O
N, the first reference voltage V1 (61) is switched to the reference voltage VB (67) for outputting bias power,
Due to the transistor 73, the current flowing through the semiconductor laser 55 increases up to the current for emitting bias power. Further, since the WTDT signal is at L level, the current from the transistor 83 does not flow to the semiconductor laser 55. Therefore, the power of the semiconductor laser 55 increases to the bias power.

(Section T3) Since the WTGT signal becomes the H level, the switch 72 is turned off, the closed loop control by the closed loop control means 59 is interrupted, and the open loop control is performed by the output of the sample hold circuit 68. That is, a current for emitting bias power continues to flow in the transistor 73.

On the other hand, when the WTGT signal becomes the H level, the switch 87 is turned on and the switch 88 is turned off, and the second closed loop system control means 74 operates. The reference voltage of the second closed loop control means 74 is the reference voltage VP (76) for outputting the peak power. Also, WTD
Since the T signal is at the H level, the transistor 86 is turned on.
N, the transistor 85 is turned off, and the currents flowing through the transistors 73 and 83 are added and flow through the semiconductor laser 55. Therefore, the power of the semiconductor laser 5 increases to the peak power.

(Section T4) Since the PKHD signal becomes H level, the switch 82 is turned off, the closed loop control by the closed loop control means 74 is interrupted, and the open loop control is performed by the output of the sample hold circuit 78. After that WTD
When the T signal is at the H level, the currents flowing in the transistors 73 and 83 are added and flow to the semiconductor laser 55. When the T signal is at the L level, only the current flowing in the transistor 73 can flow to the semiconductor laser 55, so that the laser power is WTD.
Depending on T, it is modulated between peak power and bias power. Therefore, the voice information is recorded.

(T5 section) Since the WTGT signal becomes L level, the first closed loop system control 59 operates. BS
Since the GT signal becomes L level, the switch 65 is turned on.
Then, the first reference voltage V1 (61) is switched to the reference voltage VR (66) for outputting the reproduction power, and the current flowing through the semiconductor laser 55 by the transistor 73 is reduced to the current for emitting the reproduction power. Also, WTD
Since the T signal is at the L level, the transistor 85
N, the transistor 86 is turned off, and the current from the transistor 83 does not flow to the semiconductor laser 55. Therefore, the semiconductor laser 55 emits light with reproducing power. Therefore, the image information does not change.

The operation in the first field has been described above, but the same applies to the second fields 102, 12, and 13-. In this way, only the voice information can be rewritten.

FIG. 5 shows, as a reference, an operation waveform diagram when normal recording is performed. The operation is shown below.

FIG. 5A shows a recording format.

The recording frame detection circuit 28 uses the address 1
It is detected that the frame numbers 01 and 102 are frames to be recorded, and the WTEN signal is output as shown in FIG. 5B.

The recording gate generation circuit 33 outputs the WTEN signal and turns on / off the after-recording.
When the OFF signal is detected to be OFF, for example, the first
In the case of the field, each gate signal is output as follows.

The BSGT signal is set to H from the beginning of the LPC area (1) to the end of the image information recording area VIDEO (10).
Set to level (Fig. 5 (c)).

The WTGT signal is set to H level from the middle of the LPC area (1) to the end of the image information recording area VIDEO (10).
Set to level (Fig. 5 (d)).

The PKHD signal is set to H level from the end of the LPC area (1) to the end of the image information recording area VIDEO (10).
Set to level (Fig. 5 (e)).

The ENA1 signal is set to the H level only in the audio first channel information recording area A1 (2) (see FIG. 5).
(F)).

The ENA2 signal is set to H level only in the audio second channel information recording area A2 (4) (see FIG. 5).
(G)).

The ENA3 signal is set to the H level only in the audio third channel information recording area A3 (6) (see FIG. 5).
(H)).

The ENA4 signal is set to the H level only in the audio fourth channel information recording area A4 (8) (see FIG. 5).
(I)).

The ENV signal is sent to the image information recording area VIDE.
Only O (10) brings it to the H level (FIG. 5 (j)).

Therefore, the WTDT signal becomes as shown in FIG. The laser emission waveform at this time is as shown in FIG. 5L, and the image recording areas 10 and 21 are also modulated between the peak power and the bias power, and both voice and image information are recorded.

As described above, according to the present embodiment, by recording the voice information immediately after the region where the laser power is set to a desired value, only the voice information is recorded later.
Or after-recording that rewrites is possible.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 6 shows an optical disk used in the recording method of this embodiment. Reference numerals 89, 90, 91 and 92 denote address portions, and 93 denotes a track. This optical disc is 1800
One frame of the NTSC signal is recorded in one rotation and one field is recorded in half rotation by rotating at 1 rpm, but in the present invention, one field is further divided into two sections and recorded. Specifically, in the first field / first section (G area), half of the image information of the audio first channel and the first field is recorded, and in the first field / second section (H area), the audio first channel is recorded. The remaining half of the image information of channel 2 and the first field is recorded. Also, the second field, the first
Half of the image information of the audio third channel and the second field is recorded in the section (I area), and the remaining image information of the audio fourth channel and the second field is recorded in the second field and the second section (J area). Record half.

Therefore, in the address section, the frame number,
Information indicating the field number and classification number is written.
Taking a track with a frame number of 100 as an example, information indicating a frame number of 100, a field number of 1, and a division number of 1 is written in the address portion 89, and a frame number of 100 and a field number are written in the address portion 90. 1, information indicating the division number 2 is written, information indicating the frame number 100, field number 2, and division number 1 is written in the address portion 91, and frame number 100, in the address portion 92. Information indicating the field number 2 and the division number 2 is written.

FIG. 7 shows a recording format used in the recording method of this embodiment.

Address 89 of the first field / first section
Followed by L to set the laser power to the desired value
A PC area 94 is arranged, and subsequently, an area A1 (95) for recording audio first channel information, a gap 96, and an area V11 (9 for recording half of the image information of the first field).
7), the gap 98, the address 90 of the first field / second section, the LPC area 99 for setting the laser power to a desired value, the area A2 (100) for recording the audio second channel information, and the gap 101. , The area V12 (10) for recording the other half of the image information of the first field.
2), the gap 103, the address 91 of the second field / first section, the LPC area 104 for setting the laser power to a desired value, the area A3 (105) for recording the audio third channel information, and the gap 106. , An area V21 (10) for recording half of the image information of the second field
7), the gap 108, then the address 92 of the second field / second section, the LPC area 109 for setting the laser power to a desired value, the area A4 (110) for recording the audio fourth channel information, and the gap 111. , The area V22 (11) for recording the other half of the image information of the second field
2) and the gap 113 are arranged in this order.

FIG. 8 is a block diagram of an optical recording / reproducing apparatus for recording according to the recording format of FIG. In FIG. 8, 114 is an optical head, and the optical disk 11
A light spot is formed on the optical disc 5, and recording / reproducing is performed.

A reproduction amplifier 116 amplifies a reproduction signal.

Reference numeral 117 denotes a binarization circuit, which outputs a reproduction signal to 2
The value is converted and the reproduced data is output.

Reference numeral 118 denotes an address reading circuit, which is used to reproduce the frame number, field number,
Read the information of the division number.

A recording frame detection circuit 119 compares the recording start frame number FS and the recording end frame number FE input in advance with the current frame number FX sent from the address reading circuit 118, and FS≤
When FX ≦ FE, WT in each section in the frame
The FM signal (120) is set to H level.

Reference numeral 121 denotes a first field / first section detection circuit, which checks the field number / section number sent from the address reading circuit 118 to detect the first field / first section, The DT11 signal (122) which becomes H level in the field / first division is output.

Similarly, reference numeral 123 is a first field / second section detection circuit, which detects the first field / second section and becomes DT in the first field / second section.
12 signals (124) are output.

Similarly, reference numeral 125 is a second field / first section detecting circuit, which detects the second field / first section and becomes DT in the second field / first section.
21 signal (126) is output.

Similarly, 127 is a second field / second section detecting circuit, which detects the second field / second section and becomes DT in the second field / second section.
22 signals (128) are output.

The AFRON signal (129) is set to the H level when the after-recording is performed, and is set to the L level when the after-recording is not performed.

The AFRCH1 signal (130) is the first audio signal.
Set to H level when after-recording a channel, and set to L level when not recording.

The AFRCH2 signal (131) is the second audio signal.
Set to H level when after-recording a channel, and set to L level when not recording.

The AFRCH3 signal (132) is the third audio signal.
Set to H level when after-recording a channel, and set to L level when not recording.

The AFRCH4 signal (133) is the fourth audio signal.
Set to H level when after-recording a channel, and set to L level when not recording.

Reference numeral 134 denotes a recording gate generation circuit,
When the TEN signal (135) is input, each gate signal required for recording is output. That is, the BSGT signal (142), the WTGT signal (143), and the PKHD signal (144) are output to the semiconductor laser drive circuit 141, and the ENA signal which becomes H level in the area for recording audio information in each section. (145), the ENV signal (146) which becomes H level in the area for recording the image information in each section is output. In addition, each gate signal is changed according to the AFRON signal (129).

Reference numeral 141 denotes a semiconductor laser drive circuit, which drives the semiconductor laser to perform recording / reproduction.

Reference numeral 136 is a buffer for the audio first channel information, which outputs information when the ENA1 signal (147) is at H level.

Reference numeral 137 is a voice second channel information buffer, which outputs information when the ENA2 signal (148) is at H level.

Reference numeral 138 is a buffer for audio third channel information, which outputs information when the ENA3 signal (149) is at H level.

Reference numeral 139 is a buffer for audio fourth channel information, which outputs information when the ENA4 signal (150) is at H level.

Reference numeral 140 denotes an image information buffer, which is EN
Information is output when the V signal (146) is at the H level.

As the semiconductor laser drive circuit 141, the configuration shown in FIG. 3 of the first embodiment may be used as it is.

FIG. 9 is an operation waveform diagram when after-recording the audio second channel and the audio fourth channel by the recording method of the present invention. This operation will be described.

FIG. 9A shows a recording format.
The address 89 is the address of the first field / first section of the frame to be recorded. Address 90 is
This is the address of the first field / second section of the frame to be recorded. The address 91 is the address of the second field / first section of the frame to be recorded. The address 92 is the second of the frame to be recorded.
This is the address of the field / second section.

The recording frame detection circuit 119 detects that the addresses 89, 90, 91 and 92 have the frame numbers to be recorded, and sets the WTFM signal (120) to the H level in each section.

[0117] The AFRON signal (12
9) H level, AFRCH1 signal (130) L level, AFRCH2 signal (131) H level, AFRC
H3 signal (132) is at L level, AFRCH4 signal (1
33) is set to the H level, so that the WTFM signal (120) includes the second audio channel and the fourth audio channel, the first field / second section and the second section.
The WTEN signal (135) which becomes the H level only in the second section of the field is output (FIG. 9B).

The recording gate generation circuit 134 is a WTEN.
It is detected that the signal (135) is output and that the AFRON signal is at the H level, and for example, in the second division of the first field, each gate signal is output as follows.

The BSGT signal is transferred from the beginning of the LPC area (99) to the audio second channel information recording area A2 (100).
The H level is maintained until the end of (FIG. 9 (c)).

The WTGT signal is transferred from the middle of the LPC area (99) to the audio second channel information recording area A2 (100).
The H level is maintained until the end of (FIG. 9 (d)).

The PKHD signal is transferred from the end of the LPC area (99) to the audio second channel information recording area A2 (100).
The H level is maintained until the end of (FIG. 9 (e)).

The ENA signal is set to the H level only in the audio second channel information recording area A2 (100), so that the ENA2 signal (148) is set to the H level in the audio second channel information recording area (100) (FIG. 9 ( g)).

The ENV signal remains L level (FIG. 9 (j)).

The above operation is the same in the second division of the second field.

Therefore, the WTDT signal becomes as shown in FIG. 9 (l).

Therefore, the laser emission waveform at this time is as shown in FIG. 9L, and only the audio second channel information and the audio fourth channel information are recorded.

As can be seen from the above description, AFRCH
If you set 1 (130) to H level, you can after-record the first audio channel, AFRCH2 (131)
To H level for after-recording the second audio channel, AFRCH3 (132) for H level for after-recording the third audio channel, and AFRCH4 (133) for H level for after-recording the fourth audio channel. You can record. That is, each audio channel can be independently after-recorded.

FIG. 10 shows, as a reference, an operation waveform diagram when normal recording is performed. The operation is shown below.

FIG. 10A shows the recording format. The address 89 is the first of the frame to be recorded.
This is the address of the field / first division. Address 90
Is the first and second fields of the frame to be recorded.
The address of the section. The address 91 is the address of the second field / first section of the frame to be recorded. The address 92 is the address of the second field / second section of the frame to be recorded.

The recording frame detection circuit (119) detects that the addresses 89, 90, 91 and 92 have the frame number to be recorded, and in each section, the WTFM
The signal (120) is set to H level.

Since the AFRON signal (129) is set to the L level, the WTFM signal (120) is directly output to the WTEN signal (135) (FIG. 10).
(B)).

The recording gate generation circuit 134 is a WTEN.
It is detected that the signal (135) is output and that the AFRON signal is OFF, and for example, in the first division of the first field, each gate signal is output as follows.

The BSGT signal is set to H level from the beginning of the LPC area (94) to the end of the audio first channel information recording area A1 (95) (FIG. 10 (c)).

The WTGT signal is set to H level from the middle of the LPC area (94) to the end of the audio first channel information recording area A1 (95) (FIG. 10 (d)).

The PKHD signal is set to H level from the end of the LPC area (94) to the end of the audio first channel information recording area A1 (95) (FIG. 10 (e)).

The ENA signal is set to the H level only in the audio first channel information recording area A1 (95).
The NA1 signal (147) becomes H level in the audio first channel information recording area (95) (FIG. 10 (f)).

The ENV signal corresponds to the image information recording area V11.
Only at (97), the H level is set (FIG. 10 (j)).

Similarly, in the second division of the first field, the ENA2 signal (148) becomes H level in the audio second channel information recording area A2 (100), and the ENV signal becomes the image information recording area V12 (102). Goes to H level.

Similarly, in the first division of the second field, the ENA3 signal (149) becomes H level in the audio third channel information recording area A3 (105), and the ENV signal becomes the image information recording area V21 (107). Goes to H level.

Similarly, in the second division of the second field, the ENA4 signal (150) becomes H level in the audio fourth channel information recording area A4 (110), and the ENV signal becomes the image information recording area V22 (112). Goes to H level.

Therefore, the WTDT signal becomes as shown in FIG.

Therefore, the laser emission waveform at this time is as shown in FIG. 10L, and the voice and image information is recorded.

As described above, according to this embodiment, the information for one field is divided into a plurality of sections, and an area for setting the laser power to a desired value is provided at the beginning of each section, Immediately after that, by providing an area for recording audio information, it is possible to after-record the audio information consisting of a plurality of channels independently for each channel.

In the first and second embodiments, the recording on the phase change rewritable medium has been described as an example, but the same effect can be obtained when recording on another optical recording medium such as a magneto-optical medium. is there.

[0145]

As described above, according to the present invention, the recording is performed using the recording format configured to record the audio information immediately after the area for setting the light beam power to a desired value. It has the advantage of being able to fully record.

[Brief description of drawings]

FIG. 1 is a diagram of a recording format used in a recording method of audio and image information according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a recording / reproducing apparatus for realizing the recording method in the first embodiment.

FIG. 3 is a configuration diagram of a semiconductor laser drive circuit used in a recording / reproducing apparatus for realizing the recording method in the first embodiment.

FIG. 4 is an operation waveform diagram for explaining an audio after-recording operation in the recording method in the first embodiment.

FIG. 5 is an operation waveform diagram for explaining a normal recording operation in the recording method in the first embodiment.

FIG. 6 is a diagram showing an optical disc used in a recording method of audio and image information according to a second embodiment of the present invention.

FIG. 7 is a diagram of a recording format used in a recording method of audio and image information in the second embodiment.

FIG. 8 is a block diagram of a recording / reproducing apparatus for realizing the recording method in the second embodiment.

FIG. 9 is an operation waveform diagram for explaining an audio after-recording operation in the recording method according to the second embodiment.

FIG. 10 is an operation waveform diagram for explaining a normal recording operation in the recording method in the second embodiment.

FIG. 11 is a diagram showing an optical disc used in a conventional recording method of audio and image information.

FIG. 12 is a recording format and operation waveform diagram used in a conventional recording method of audio and image information.

[Explanation of symbols]

1 Laser power setting area 2 Audio channel 1 information recording area 4 Audio channel 2 information recording area 6 Audio channel 3 information recording area 8 Audio channel 4 information recording area 10 Image information recording area 89 addresses (first field, first division) 90 addresses (first field, second division) 91 addresses (2nd field, 1st division) 92 addresses (second field, second division) 93 truck 94 Laser power setting area 95 Audio 1st channel information recording area 97 Image information recording area 99 Laser power setting area 100 audio second channel information recording area 102 image information recording area 104 Laser power setting area 105 audio channel 3 information recording area 107 image information recording area 109 Laser power setting area 110 audio channel 4 information recording area 112 image information recording area 114 addresses 115 addresses 116 trucks 117 Laser power setting area 118 audio channel 1 information recording area 120 audio second channel information recording area 122 image information recording area 124 audio third channel information recording area 126 audio fourth channel information recording area

Claims (4)

[Claims] 1. A recording method for recording voice and image information on an optical information recording medium by irradiation of a light beam, wherein voice information is recorded immediately after an area for setting the power of the light beam to a desired value. A method for recording audio and image information, characterized in that audio and image information is recorded using a recording format in which an area to be recorded is provided. 2. A method of recording voice and image information on an optical information recording medium by irradiating a light beam, wherein information for one field is divided into a plurality of sections, and the light beam power is set at the head of each section. Recording of audio and image information characterized by performing recording of audio and image information using a recording format in which an area for setting a desired value is provided and immediately after that, an area for recording audio information is provided Method. 3. An audio signal, characterized in that an area for recording information for one field is divided into a plurality of sections, and an identification signal for identifying each section is arranged at the head of each section. And an optical information recording medium for recording image information. 4. The optical information recording medium as claimed in claim 3, wherein the identification signal is recorded in advance with concave and convex pits.