JPH07272274A - Optical disk dubbing device - Google Patents

Abstract

PURPOSE:To perform dubbing operation of a disk at high speed by using a multi-beam head which can reproduce and record information of plural tracks in parallel. CONSTITUTION:This device is provided with an optical disk reproducing device 11 in which a two-beam head 40 is incorporated, an optical disk recording device 21 in which two-beam head 50 of the same kind is incorporated, and a system control device 30 which adjusts rotation speed of disks and timing of processing a signal in each device. A track adjacent to an original disk 12 is irradiated with two light spots of the two-beam head 40, information of two tracks is reproduced in parallel which performing track jump every rotation of a disk, if necessary, in accordance with a format of a disk. The reproduced information is sent to the optical disk recording device 21, and recorded in two tracks of a disk 22 to be dubbed in parallel by the same process as reproducing. Therefore, high speed dubbing can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc dubbing apparatus for recording information on a recording medium which can be optically recorded and reproduced and reproducing the recorded information from this medium.

[0002]

2. Description of the Related Art A general structure of an optical disc which is an optical recording medium is schematically shown in FIG. In FIG. 7, reference numeral 1 is a disk substrate, and 2 is a groove (guide groove) formed on the disk substrate 1 in a spiral shape. The groove pitch is usually set to about 1 to 2 μm. A recording film 3 is provided on the disc substrate 1, and a protective layer 4 is formed on the recording film 3 to protect the recording film 3. A laser beam 5 is emitted from an optical head (not shown). Laser beam 5
Are controlled so as to form an image as a spot 6 at the groove 2 position of the recording film 3. Groove 2 for this spot 6
By scanning upward, the information of the pit 7 formed on the groove 2 is reproduced, or the pit 7 is recorded on the groove 2. A flat portion between the grooves 2 is called a land 8, and a pit 7 may be recorded on the land 8 instead of the groove 2. In addition, pits 7 may be recorded on both the grooves 2 and the lands 8 for higher density. This is called land groove recording.

In order to copy information on such an optical disk onto another optical disk, there are provided an optical disk reproducing apparatus for reproducing information on the copy source disk and an optical disk recording apparatus for recording the reproduced information on the copy destination disk. Two optical disk devices are required. FIG. 8 shows an example of the configuration of such an optical disc dubbing apparatus. In FIG. 8, 1
Reference numeral 1 is an optical disk reproducing apparatus, and 21 is an optical disk recording apparatus. The optical disk reproducing device 11 is a copy source disk 12.
Is a device for reproducing the information recorded on the disk, and is a motor 13 for rotating the copy source disk 12, a head 14, and a transfer mechanism 1 for moving the head 14 in the disk radial direction.
5, a reproduction signal processing circuit 16 for performing signal processing of a signal reproduced by the head 14, an address reproduction circuit 17 for reproducing address information of the copy source disk 12, and a control circuit 18 for controlling the overall operation of the optical disk reproduction apparatus 11. .
The control circuit 18 controls the rotation speed of the motor 13 to a predetermined value, controls the head 14 to a correct position, and appropriately controls the operation timing of the reproduction signal processing circuit 16. The reproduction signal processed by the reproduction signal processing circuit 16 is sent to the optical disc recording device 21.

The optical disk recording device 21 is a device for recording information on a copy destination disk 22 having the same disk format as the copy source disk 12, and includes a motor 23 for rotating the copy destination disk 22, a head 24, and a head 24. A transfer mechanism 25 for moving in the disc radial direction, a recording signal processing circuit 26 for performing signal processing of the signal sent from the reproduction signal processing circuit 16, an address reproducing circuit 27 for reproducing address information of the copy destination disk 22, and an optical disk recording device. The control circuit 28 controls the operation of the whole 21. The control circuit 28 controls the number of revolutions of the motor 23 to a predetermined value to control the head 24 at a correct position, and
It plays a role of properly controlling the operation timing of the recording signal processing circuit 26.

A system controller 30 controls the optical disk reproducing device 11 and the optical disk recording device 21 so that the disk rotational speeds of the optical disk reproducing device 11 and the optical disk recording device 21 are synchronized.
4 and the position of the head 24 and the operation timings of the reproduction signal processing circuit 16 and the recording signal processing circuit 26 are controlled so that the operation of the entire system is controlled.

[0006]

Since the capacity of optical discs has increased with the times, the time required for copying becomes longer. Several methods can be considered to shorten this. For example, there is a method in which the configuration of the device remains the same as that of FIG. 8 and the disc rotation speed and the speed of the reproduction signal processing and the recording signal processing are made faster than usual. This method is effective to some extent, but is limited by the rotation control band of the disk and the frequency band of the head. Also, in the optical disc recording device,
The recording speed is limited by the maximum output of the light source element as the tangential velocity of the track increases, because the output power of the light source must be increased in order to provide sufficient energy for recording. Therefore, in order to exceed these limits and further reduce the copying time, another means is required.

It is also conceivable to increase the number of heads of each optical disk device and copy information in parallel while synchronizing with each other. However, this method has a problem that the number of parts is increased, the size of the apparatus is increased, and the number of controlled objects for synchronization is increased, which increases the difficulty of the control.

An object of the present invention is to provide an optical disk dubbing apparatus which solves the above-mentioned drawbacks and which enables high-speed dubbing more than twice in addition to the conventional speed-up means.

[0009]

In order to achieve this object, the present invention provides a multi-beam head capable of reproducing and recording information on a plurality of tracks in parallel, and a predetermined track depending on the format of a disc to be copied. And a means for jumping by a minute track.

[0010]

According to the present invention, a multi-beam head having a larger number of beams than the head used when normally reproducing a copy source disk is used to copy information on a plurality of tracks in parallel, thereby performing a disk copy operation. Can be speeded up.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, as an embodiment of the present invention, an optical disk dubbing apparatus for a disk having a format in which a one-beam head is used to record and reproduce information pits on either a groove or a land during normal use will be described.

FIG. 1 shows the configuration of this embodiment, and the elements having the same functions as those of the conventional example of FIG. 8 are designated by the same reference numerals. In FIG. 1, reference numeral 40 is a reproduction two-beam head, and 16a and 16b are first and second reproduction signal processing circuits for processing signals reproduced by one beam and the other beam of the reproduction two-beam head 40, respectively. is there. First and second reproduced signal processing circuits 16a and 1
The signals processed by 6b are sent to the first and second recording signal processing circuits 26a and 26b of the optical disk recording device 21, respectively, and subjected to signal processing for recording on the copy destination disk. The signal processed here is for recording 2
It is recorded on the copy destination disk 22 by the beam head 50.

FIG. 2 is an explanatory view showing a reproducing procedure in the optical disk reproducing device 11. In FIG. 2, T0, T
Information tracks 1, 6 and T6 correspond to approximately the center of the groove or land and represent a part of the originally spiral track. S1 and S2 are information recording areas of the sector, A1 is an address area preceding the sector S1, P2 is a postamble added to the end of the information area of the sector S2, G is the end of the postamble P2 and the start of the address area A1. It is a gap provided between and. Seen from the coordinate system fixed to the disk, the spot moves from right to left in the figure over time. When such a disc is normally used, information is recorded or reproduced by sequentially scanning each track T0, T1, T5 using a one-beam head.

On the other hand, when copying is performed by the optical disk dubbing apparatus shown in FIG. 1, two beam spots of the two-beam head are located at the positions 61a and 62a of the track T1 and the track T2 adjacent thereto at a certain time.
It is assumed that each is illuminated. These spots scan their respective tracks, but since the tracks are spiral, they reach the positions 61b and 62b of the tracks T2 and T3, respectively, while the disk makes one revolution. 61c and 62c are spot positions immediately after the spots have further moved and the trailing spots on the track T3 have passed the postamble P2.

The control circuit 18 of the optical disk reproducing device 11
Controls the two-beam head 40 to jump one track immediately after the trailing spot finishes playing the postamble P2.
And 62d. The length of the gap G is
It is determined that the preceding spot 61d does not enter the address area A1 when the track jump is completed. After a further lapse of time, each spot scans each track and reaches the positions 61e and 62e of the tracks T2 and T3 after one rotation of the disk. Thereafter, in the same manner, the two beam spots reproduce the information of each track while repeating the track jump for each rotation of the disk.

The recording procedure in the optical disk recording device 21 is the same. However, the timing of the track jump is controlled by the control circuit 28 at the moment when the trailing spot finishes recording the postamble information.

As described above, the information of the two tracks can be copied in parallel by jumping one track for one rotation of the disk by using the two spots. Therefore, the speed of copying can be doubled as compared with the copying speed by one beam head. Even if a head having a larger number of beams such as a three-beam head or a four-beam head is used instead of the two-beam head, the copying speed is tripled or four times.
It goes without saying that the speed can be doubled.

The disks targeted in the embodiments of FIGS. 1 and 2 are usually in a format using a one-beam head and using only one of a groove and a land as an information track. This is a format that is generally widely used in currently popular optical disk devices.

On the other hand, in order to increase the capacity of the disk, a format in which land-groove recording is performed by a one-beam head has been proposed. A recording procedure on a disc having such a format will be described with reference to FIG.

In FIG. 3, T0, T2 and T4 are tracks on lands, and T1, T3 and T5 are tracks on grooves. S1, S2, P1, A2 and G are the same as in the example of FIG. It is assumed that the spot of one beam head is located at the position 71a on the groove side track T1 at a certain time. This spot records information while scanning on the track T1, but since the track is spiral, it reaches the position 71b of the track T3 after one revolution of the disk. If the spot moves as it is, track T
Since the second sector S1 cannot be scanned, a control circuit (not shown) controls to jump one track from the spot position 71c immediately after recording the postamble P2 to the position 71d on the track T2. It

Since the track T3 is on the groove and the adjacent track T2 is on the land, tracking servo is performed by reversing the polarity of the tracking servo signal after the track jump. When the time further passes, the spot scans the track T2 and reaches the position 71e of the track T4 after one rotation of the disk. When the position 71f immediately after recording the postamble P2 is reached, the track jumps to the adjacent track T3 and moves to the position 71g. At this time, it is a track jump from the land to the groove. Thereafter, similarly, the two beam spots record the information of each track while repeating the track jump for each rotation of the disk. The procedure for reproduction is similar. In this way, it is possible to record and reproduce information on both the groove and the land using the one-beam head. The optical disc dubbing apparatus having the same configuration as that in FIG. 1 can be applied to a disc recorded by such a method.

As a second embodiment of the present invention, a reproducing procedure in the optical disk reproducing apparatus 11 in such a case will be described with reference to FIG. 4, the same components as those in FIG. 2 are designated by the same reference numerals. It is assumed that two spots of the two-beam head are located at a position 61a on the groove side track T1 and a position 62a on the track T2 at a certain time. These spots move along each track with the passage of time, and after one rotation of the disc, positions 61b and 62b of tracks T3 and T4, respectively.
Reach

When each spot moves further, the trailing spot passes through the postamble P2. But truck T
Since the sector S1 of No. 2 has already been scanned by the trailing spot, the track jump is performed here by the track T.
No need to go back to 2. Therefore, each spot directly enters the next sector S1 and reaches the positions of 61f and 62f, respectively. After that, similarly, all recorded information can be reproduced by scanning each track of the groove and the land with two beam spots without jumping the tracks. The procedure for recording is similar.

As described above, even for a disc of a format in which land groove recording is performed by the one-beam head, two spots of the two-beam head are used for two revolutions during one revolution of the disc.
Track information can be recorded and played back.
The beam head can double the speed of copying work. Further, since it is not necessary to perform a track jump at the time of copying, there are advantages that the control of the apparatus is easy and stable, and the length of the gap G does not need to be longer than necessary.

In the above embodiments, the disk using the one-beam head for normal recording / reproduction was targeted.
The principle of the present invention can also be applied to a disk that normally records or reproduces information on tracks of both lands and grooves in parallel by using a two-beam head. FIG. 5 shows the configuration of an optical disk dubbing apparatus which is an embodiment of this case, and the same components as those in FIG. 1 are designated by the same reference numerals. In FIG. 5, reference numeral 41 is a reproduction four-beam head, and 16a, 16b, 16c, and 16d process signals reproduced by four beams of the reproduction four-beam head 41, respectively, first, second, third, It is a fourth reproduction signal processing circuit. Each reproduction signal processing circuit 16a, 16b, 1
The signals processed by 6c and 16d are sent to the first, second, third, and fourth recording signal processing circuits 26a, 26b, 26c, and 26d of the optical disk recording device 21, respectively, and are recorded on the copy destination disk. Signal processing is performed. The signal processed here is recorded on the copy destination disk 22 by the recording 4-beam head 51.

FIG. 6 is an explanatory diagram showing a reproducing procedure in the optical disk reproducing apparatus 11 in this embodiment. In FIG. 6, T0, T2, T4, T6, and T8 are tracks on lands, and T1, T3, T5, T7, and T9 are tracks on grooves. S1, S2, P1, A2
And G are the same as in the example of FIG. It is assumed that four spots of the reproducing four-beam head 41 are located at positions 81a, 82a, 83a, and 84a, respectively, at a certain time. These spots are tracks T1 and T, respectively.
2, T3, T4 are scanned, but since the tracks are spiral, the tracks T3, T3,
Positions 81b, 82b, 83b, 84 of T4, T5, T6
reach b. 81c, 82c, 83c, and 84c are the spot positions immediately after the spots have further moved and the spots on the track T6 have passed the postamble P2.

Control circuit 18 of optical disk reproducing apparatus 11
Controls the 4-beam head 41 so that the spot jumps by 2 tracks immediately after the reproduction of the postamble P2 is finished for this spot.
Move to the positions of d, 82d, 83d and 84d. The length of the gap G is determined so that the spot 81d does not enter the address area A1 when the track jump is completed. After that, each spot continues scanning each track,
Similarly, the four beam spots reproduce the information of each track while repeating the track jump for each rotation of the disk. The recording procedure in the optical disk recording device 21 is the same. However, the timing of the track jump is controlled by the control circuit 28 so that the most delayed spot is at the moment when the recording of the postamble information is completed.

In this way, by performing track jumps for two tracks per one rotation of the disk using the four spots, information on the four tracks can be reproduced and recorded in parallel. Therefore, it is possible to double the speed of the copying operation using the same two-beam head used for normal recording and reproduction.

[0029]

As described above, the optical disc dubbing apparatus according to the present invention uses a multi-beam head capable of reproducing and recording information on a plurality of tracks in parallel.
Since the head is controlled so as to jump a predetermined number of tracks in accordance with the format of the disk to be copied, the copying operation can be performed more than when a head having the same number of beams as the head used for normal recording and reproduction is used. It can speed up. The present invention is a method of increasing the number of revolutions of the disk and the speed of the reproduction signal processing and the recording signal processing, which have been considered as a conventional disk copying speed-up method, and a method of increasing the number of heads and synchronizing them respectively. It can be used in combination with a method of copying information in parallel, which is very effective for speeding up copying work. Further, for a disk of a format in which the land beam recording is performed by using the one-beam head at the time of normal use, the copying operation can be performed by using the two-beam head without the track jump, so that the control of the device is easy and stable. , It is not necessary to make the gap length between sectors longer than necessary.

Further, in the above embodiment, the optical disc dubbing apparatus which uses the two-beam head for the disc using the one-beam head and the four-beam head for the disc using the two-beam head at the time of the normal recording / reproducing is described. However, it is a matter of course that an optical disk dubbing apparatus using an n beam head can be configured with respect to a disk that normally uses an m beam head at the time of recording / reproducing, where m and n are natural numbers (m <n).

[Brief description of drawings]

FIG. 1 is a configuration diagram of an optical disc dubbing apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a spot movement and a recording / reproducing procedure during copying in the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a spot movement and a recording / reproducing procedure during normal recording / reproducing in another embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a spot movement and a recording / reproducing procedure during copying in another embodiment of the present invention.

FIG. 5 is a configuration diagram of an optical disc dubbing apparatus according to a third embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a spot movement and a recording / reproducing procedure during copying in the third embodiment of the present invention.

FIG. 7 is a schematic diagram showing a general structure of an optical disc.

FIG. 8 is a block diagram of a conventional optical disc dubbing device.

[Explanation of symbols]

1 substrate 2 groove 3 recording film 4 protective layer 5 laser beam 6 spot 7 pit 8 land 11 optical disc reproducing device 12 copy source disc 13 motor 14 head 15 transport mechanism 16 reproducing signal processing circuit 16a first reproducing signal processing circuit 16b second Reproduction signal processing circuit 16c third reproduction signal processing circuit 16d fourth reproduction signal processing circuit 17 address reproduction circuit 18 control circuit 21 optical disk recording device 22 copy destination disk 23 motor 24 head 25 transfer mechanism 26 recording signal processing circuit 26a second 1 recording signal processing circuit 26b 2nd recording signal processing circuit 26c 3rd recording signal processing circuit 26d 4th recording signal processing circuit 27 address reproducing circuit 28 control circuit 30 system control device 40 reproducing 2 beam head 41 reproducing 4 beam head 50 Use two-beam head 51 recording four-beam head 61a, 61b, 61c, 61d, 61e, 61f 2
First spot of beam head 62a, 62b, 62c, 62d, 62e, 62f 2
Second spot of beam head 71a, 71b, 71c, 71d, 71e, 71f, 7
1g 1 beam head spot 81a, 81b, 81c, 81d 4 beam head first spot 82a, 82b, 82c, 82d 4 beam head second spot 83a, 83b, 83c, 83d 4 beam head third spot Spots 84a, 84b, 84c, 84d Fourth spot of 4 beam head

Claims (4)

[Claims] 1. An optical disk reproducing apparatus equipped with a multi-beam head, an optical disk recording apparatus equipped with a multi-beam head having the same number of beams, and means for jumping a predetermined number of tracks according to the format of the disk.
An optical disk dubbing device comprising: a synchronous circuit for adjusting the disk rotation speed of each device and the timing of signal processing, and copying information recorded on one disk to another disk. 2. A disc on which information is recorded in either a land or a groove is used as a copy source disc,
With the optical disk playback device equipped with a 2-beam head,
Information recorded on two adjacent tracks of the copy source disk is simultaneously reproduced while the head jumps by one track for each rotation of the disk, and the reproduction information is reproduced by an optical disk recording device equipped with a two-beam head. 2. The optical disk dubbing apparatus according to claim 1, wherein the head is jumped by one track for each rotation of the disk, and recording is performed on two adjacent tracks of the copy destination disk. 3. A disc as a copy source, which has information recorded on both lands and grooves by an optical disc device having a one-beam head, and track jumps by an optical disc reproducing device having a two-beam head. The information recorded on the land and groove of the copy source disc is continuously reproduced in parallel, and the reproduced information is continuously recorded in parallel by an optical disc recording device equipped with a two-beam head without track jumping. The optical disk dubbing device according to claim 1, wherein 4. A disk as a copy source is one in which information is continuously recorded on both lands and grooves by an optical disk device having a two-beam head, and one disk rotation is made by an optical disk reproducing device having a four-beam head. The information recorded on two adjacent sets of land and groove of the copy source disc is simultaneously reproduced while the head jumps by two tracks for each reproduction, and the reproduction information is reproduced by an optical disc recording apparatus equipped with a 4-beam head. 2. The optical disk dubbing apparatus according to claim 1, wherein the head is jumped by two tracks for each rotation of the disk, and recording is performed on two adjacent sets of land and groove of the copy destination disk.