JP2000215448A - Disk recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a disk recording device which is capable of recording information matched with a format regardless of the arrangement of recording means while the recording is conducted by plural recording means against a disk shaped recording medium having multispiral tracks, SOLUTION: If arrangements of optical pickups OP6 and OP8 of an optical disk recording device are matched with the angular relationship of the data of a recording format, but the angular arrangement of optical pickups OP5 and OP7 is different, the recording data of the pickups OP5 and OP7 are delayed by delaying means 6 and 7. Thus, the data arrangement to be recorded on an optical disk 1 is matched with a recording format.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording apparatus, and more particularly to a disk recording apparatus for recording data on a disk-shaped recording medium composed of multi-spiral tracks by a plurality of recording means.

[0002]

2. Description of the Related Art In recent years, with the development of multimedia, video data of moving images has been recorded not only on tapes but also on disk-shaped recording media such as optical disks. Compared to ordinary data such as character information, video data is characterized by a large amount of data and a very high transfer rate. For example, MPEG (Moving Pictu
1.5Mbps (bit per secon) in reExperts Group 1
d), 4.7 on DVD (Digital Video Disc)
Information is transmitted at a transfer rate of 15 Mbps in Mbps and MPEG2. It is expected that video data such as high-definition signals will have a higher transfer rate in the future.

In order to record a signal at a high transfer rate, a method has been proposed in which a plurality of optical pickups are used to simultaneously record a plurality of spiral tracks (hereinafter, simply referred to as "spirals"). FIG. 1 shows a multi-spiral disk composed of four spiral tracks.
The four spirals SP1, SP2, SP3, and SP4 constitute a track as a set. In order to record a high transfer rate signal on such a multi-spiral disk, the high transfer rate signal is distributed to each optical pickup,
It has been proposed to record signals simultaneously with one optical pickup on one spiral.

[0004] When recording is performed on a single disk by a plurality of recording means, it is difficult to physically arrange the recording means so as to overlap each other. Therefore, when recording on four spirals with four optical pickups, it is common to arrange them with an angle difference of 90 °, which is a uniform angle difference with respect to the disk, as shown in FIG.

[0005] Therefore, in the disk format, as for the signal recorded simultaneously, the signal recorded on the spiral SP2 has a 90 ° angle difference from the signal recorded on the spiral SP1, and the signal recorded on the spiral SP3 has a 180 ° difference. A position having an angle difference and a signal recorded on the spiral SP4 are often determined to be a position having a 270 ° angle difference.

However, when the recording means of the disk recording device is arranged as shown in FIG. 4, recording cannot be performed according to the disk format. The arrangement as shown in FIG. 4 is necessary due to restrictions on external design such as a portable or camera-integrated disk recording device and restrictions on measures against vibration.

[0007]

According to the present invention, when a plurality of recording means is used for recording on a disk-shaped recording medium composed of multi-spiral tracks, the format conforms to the format regardless of the arrangement of the recording means. It is an object to realize a disk recording device capable of recording.

[0008]

According to a first aspect of the present invention, there is provided a disk recording apparatus for recording data on a single disk-shaped recording medium having a plurality of spiral tracks by a plurality of recording means. A data recording unit for distributing input data to the number of channels of the recording means, wherein at least one of the channels records data distributed from the data distribution unit. A delay means for delaying by a time based on the angular arrangement of the means is provided. Note that the disk recording device includes a disk recording / reproducing device capable of reproducing.

[0009] The disk recording apparatus according to claim 2 is characterized in that the delay means is a delay means for each sector.

In a third aspect of the present invention, the disk recording medium is an optical disk, and the recording means is an optical pickup.

According to a fourth aspect of the present invention, there is provided a disk recording apparatus for recording data in a predetermined format on a single disk-shaped recording medium having a plurality of spiral tracks by a plurality of recording means. A data distribution unit that distributes data to the number of channels of the recording unit, wherein at least one of the channels includes:
It is characterized by having delay means for delaying the data distributed from the data distribution unit by a time based on the rotational speed of the disk-shaped recording medium and the angular arrangement of the recording means.

[0012] The operation of the above-mentioned means is that even if the angle arrangement of the plurality of recording means of the disk recording apparatus with respect to the disk-shaped recording medium is different from the angle arrangement of the recording format of the disk-shaped recording medium, the distribution is performed by the data distribution unit. By delaying the data of some of the data obtained by the delay means by the delay means, the difference in the angular arrangement from the recording format is compensated, and the recording conforming to the recording format is performed on the disc-shaped recording medium.

[0013] If the delay means is a delay means for each sector, a delay corresponding to a plurality of disk formats can be realized with a simple configuration.

In such a configuration, in the case of a disk recording apparatus for recording on an optical disk by an optical pickup, the recording means usually moves in the radial direction of the disk, and the angular arrangement is determined at any radial position of the disk. Even if there is no change, the effect is great.

Further, by setting the delay time of the delay means to a time based on the rotational speed of the disk-shaped recording medium and the angular arrangement of the recording means, the angular arrangement of the plurality of recording means of the disk recording apparatus and the disk-shaped recording are achieved. Regardless of the difference in the angle arrangement of the recording format of the medium, the difference in the angle arrangement with the recording format is compensated, and the recording conforming to the recording format is performed on the disc-shaped recording medium.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described.
An optical disk recording device for recording on an optical disk will be described as an example. Note that the same reference numerals are given to components having the same structure as the conventional technology in the drawings.

First, the structure of an optical disk for recording will be described. FIG. 1 shows a schematic configuration diagram of an optical disk composed of four spiral tracks. FIG. 1A is an overall view, FIG.
FIG. 2B is a detailed view of a portion A in FIG. The optical disc 1 has a lead-in area 2, a data area 3, and a lead-out area 4 from the inner peripheral side. Each area is configured as shown in FIG. 1B by four spiral SP1 to spiral SP4.

The lead-in area 2 has a TOC (Table Of C
Ontents) For each data recorded in the data area 3, the used spiral number, start address, end address, the content of data for each spiral, and the number of rotations of the disk at the time of recording are recorded.

Each spiral has a unique address for each sector. For example, spiral S
P1 has addresses 10,000 to 19999, spiral SP2 has addresses 20000 to 29999, spiral SP3 has addresses 30000 to 39999, and spiral SP4 has addresses 40000 to 49999.

In the five-digit address, up to four digits of the number constituting the address are relative addresses common to all the spirals, and the fifth digit of the numeral constituting the address is an identifier representing the spiral number. Therefore, each optical pickup detects which spiral is being traced by detecting the address, and does not mistake the spiral to be traced.

The relative addresses of the spirals at the same angular position are the same. For example, B in FIG.
The address of the sector at the position is 120 for spiral SP1.
Assuming 00, spiral SP2 is 22000, spiral SP3 is 32000, spiral SP4 is 4200
0. The optical disc 1 is recorded from the inner peripheral side, and is recorded while being rotated in a counterclockwise rotation direction, and addresses are sequentially assigned from the inner peripheral side.

As the recording format of the optical disk 1, data to be simultaneously recorded and reproduced is recorded in a spiral SP with a 90 ° clockwise angle difference as shown in FIG.
1 to spiral SP2, spiral SP3, and spiral SP4. That is, data recorded at the same time is point C1 in spiral SP1, point C2 in spiral SP2, and point C3 in spiral SP3.
The point SP4 is located at the point C4.

This recording format originally has four optical pickups OP1, OP2, OP as shown in FIG.
3, OP4 is determined to be recorded by an optical disk recording device arranged with an angle difference of 90 °. However, there are cases where the optical pickup cannot be arranged as shown in FIG. 3 due to restrictions on the external design such as a portable or camera-integrated disk recording device and restrictions on vibration measures.

As an example of such an arrangement, FIG. 4 shows an arrangement of four optical pickups of the optical disk recording apparatus according to the embodiment of the present invention. With reference to the optical pickup OP5, the optical pickup OP6 is located at a position having an angle difference of 45 ° with respect to the rotation angle of the optical disc 1.
Is at a position where there is a 180 ° angle difference, and the optical pickup OP8
Are arranged at positions having an angle difference of 225 °. Each optical pickup can access the entire range from the inner circumference to the outer circumference of the optical disc 1.

A method of recording data in the optical disk recording apparatus so as to conform to the format described above will be described. 4
When the arrangement angles of the two optical pickups and the recording format of the optical disk 1 are compared, the optical pickups OP5 and OP7 have the spiral SP1 and the spiral SP
3 is the same as the angle position. Then, recording is made on the spiral SP1 by the optical pickup OP5 and the optical pickup O
Recording on spiral SP2 at P6, optical pickup OP
7. Recording on the spiral SP3 with the optical pickup OP8
It is determined that recording on the spiral SP4 is optimal, and the assignment is made as such.

However, if it is left as it is, as shown in the recording trace diagram in FIG. 5, the data recorded in the two spirals violates the format. Therefore, the data recorded from the two optical pickups is delayed. Based on the data recorded on the spiral SP 1, the data recorded on the spiral SP 2 is 45
{Because it is necessary to advance, the data to be recorded in the spiral SP1 is delayed by 45 ° with respect to the data to be recorded in the spiral SP2. Similarly, the data to be recorded in the spiral SP3 is delayed by 45 °.

Next, a circuit configuration of the optical disk recording apparatus according to the embodiment of the present invention will be described with reference to a block diagram shown in FIG. The data input from the outside is divided into four channels by the data distribution unit 5, data to the channel to be recorded in the spiral SP1 is supplied to the delay unit 6, and data to the channel to be recorded in the spiral SP3 is supplied to the delay unit 7. You. The delay units 6 and 7 are delayed by a delay amount corresponding to an angle of 45 ° of the optical disk 1 according to a command from the delay controller 8. The output of the delay means 6 is a recording circuit 9
The output of the delay means 7 is supplied to the recording circuit 10.

The data to the channel to be recorded in the spiral SP2 is supplied to the recording circuit 11, and the data to the channel to be recorded in the spiral SP4 is supplied to the recording circuit 12. The recording circuits 9, 10, 11, and 12 record the distributed data on the optical disk 1 via each optical pickup. Of the four spirals in the optical pickup OP5, the innermost spiral SP1 is added to the optical pickup OP.
6 for spiral SP2, optical pickup OP7 for spiral SP3, and optical pickup OP8 for spiral S
The divided data is recorded in P4.

In this way, the data recorded in the spiral SP2 and the spiral SP4 is recorded earlier than the data recorded in the spiral SP1 and the spiral SP3 by the amount of the delay means 6 and 7, but the data is recorded earlier. The data recorded on the optical disk is recorded according to the recording format.

Here, the delay means 6 and 7 have a configuration. When the rotation of the optical disk 1 by 45 ° becomes an integer number of sectors, a FIFO (First FIFO) for storing data of one sector is used.
In First Out) The memories may be connected in tandem for a predetermined sector. FIG. 7 shows a delay means with a FIFO capacity of one sector.
FIG. 2 shows a block diagram formed using a memory. Many FIs
FO memories 13, 14, 15 and a number of switches 16, 1
7, 18 and a switch control unit 19,
The delay amount can be freely set by connecting the switch. With such a configuration, the amount of delay can be easily changed, so that it is possible to cope with a plurality of disk formats.

For example, if one rotation of the optical disk 1 is 24 sectors, then 24 × 45 ° / 360 ° = 3, and FIFO memories for three sectors may be connected in cascade. Therefore, the delay controller 8 uses this FIFO
A command is issued to the delay means 6 and 7 so that three memories are connected in cascade. The switch control unit 19 of the delay means 6, 7 is FI
The switches 16, 17, and 18 are controlled so that three FO memories 13, 14, and 15 are connected in cascade.

The configuration of the delay means is not limited to this, and the delay time may be calculated based on the rotation speed of the optical disk 1 and the arrangement angle of the optical pickup, and the delay time may be delayed by a simple delay circuit. Good. For example, if the rotation speed of the optical disk is 3000 rpm, to delay by 45 °, 1 / (3000/60) × 45 ° / 360 ° = 2.5 m
s may be calculated, and may be delayed by a delay unit of 2.5 ms.

As described above, the optical disk has been described as having four spirals. However, any number of optical disks may be used as long as it has two or more spirals. The spiral may be one that continuously records or reproduces a series of data, and may be a continuous groove type or a land / groove type in which lands and grooves are reversed every rotation. In addition, although the description has been given of the example of four optical pickups, any number of optical pickups may be used as long as the number is two or more.

Although the optical disk recording apparatus for recording on an optical disk has been described as an example, a disk recording apparatus for recording on another disk-shaped recording medium such as a magnetic disk may be used as long as the disk-shaped recording medium is composed of multi-spiral tracks. However, it is clear that the same can be implemented.

[0035]

According to the disk recording apparatus of the present invention, regardless of the arrangement angle of each recording means, the distributed data is adjusted by the delay means in accordance with the arrangement angle, and the data is recorded on the disk-shaped recording medium. Since recording is performed, recording conforming to a predetermined multi-spiral recording format can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an optical disk composed of four spiral tracks, (a) is an overall view, and (b) is a detailed view of a portion A of (a).

FIG. 2 is a schematic diagram showing an example of a recording format of an optical disc.

FIG. 3 is a schematic diagram showing that four optical pickups of the optical disk recording device are arranged at an angle difference of 90 °.

FIG. 4 is a schematic diagram showing an arrangement of four optical pickups of the optical disc recording device of the embodiment.

FIG. 5 is a recording trace diagram in a case where recording is performed as it is with the four optical pickups shown in FIG. 4;

FIG. 6 is a block diagram showing a circuit configuration of the optical disc recording device of the present embodiment.

FIG. 7 is a block diagram of a delay unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk, 2 ... Lead-in area, 3 ... Data area, 4 ... Lead-out area, 5 ... Data distribution part, 6, 7
... Delay means, 8 ... Delay controller, 9, 10, 11,
12: recording circuit, 13, 14, 15 ... FIFO memory,
16, 17, 18 ... switch, 19 ... switch control unit,
OP1, OP2, OP3, OP4, OP5, OP6, O
P7, OP8: Optical pickup, SP1, SP2, SP
3, SP4 ... spiral track

Claims (4)

[Claims] 1. A disk recording apparatus for recording data on a single disk-shaped recording medium having a plurality of spiral tracks by a plurality of recording means, wherein the input data is distributed to the number of channels of the recording means. A distributing unit, wherein at least one of the channels has a delay unit for delaying the data distributed from the data distributing unit by a time based on the angular arrangement of the recording unit. Disk recording device. 2. The disk recording apparatus according to claim 1, wherein the delay unit is a sector unit delay unit. 3. The disk recording apparatus according to claim 1, wherein said disk-shaped recording medium is an optical disk, and said recording means is an optical pickup. 4. A disk recording apparatus for recording data in a predetermined format on a single disk-shaped recording medium having a plurality of spiral tracks by a plurality of recording means, wherein input data is divided by the number of channels of said recording means. A data distribution unit that distributes the data distributed from the data distribution unit based on a rotation speed of the disk-shaped recording medium and an angular arrangement of the recording unit. A disk recording device having a delay means for delaying the time by a predetermined time.