JP3427344B2 - Optical disc reproducing method and optical disc reproducing apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk reproducing method and an optical disk reproducing apparatus, and more particularly to a CD-RO.
M, CD-WO, DVD, DVD-ROM, DVD-R
A plurality of tracks of an optical disk having spiral tracks, such as AM, are simultaneously irradiated with separate light beams, and each light beam is irradiated by a recording data reproducing system from the detection output of each return beam. The present invention relates to an optical disc reproducing method and an optical disc reproducing device for reading recorded data recorded on a track.

[0002]

2. Description of the Related Art A multi-beam method is one of the methods for reading recorded data from a CD-ROM at high speed. This is to irradiate a plurality of adjacent light tracks on an optical disk having spirally formed tracks with different light beams at the same time. The recording data recorded on the recorded track is read, and the read data is output in the recording order while avoiding duplication and omission.

An optical disc (CD
-ROM) reproduction method will be described with reference to FIG. 1
Is the CD-ROM seen from the signal side (optical pickup side)
The track on which data is recorded is formed in a spiral shape (the upper side in FIG. 21 is the outer peripheral side, and the lower side is the inner peripheral side). Two
Is an optical pickup that can emit five light beams,
While rotating relative to the CD-ROM 1, it moves from the inner circumference side to the outer circumference side as the recording data is read. Now, when the optical pickup 2 comes to the position I and starts reading data, the track (x-1) to
(X + 3) respectively, the light beams 3 ₁ to 3 ₅ are simultaneously irradiated individually by each return beam predetermined recording data reproduction system from the detection output of the recording to the irradiation track of each light beam 3 ₁ to 3 ₅ The recorded data thus read is read.

The data recorded on the CD-ROM 1 is A-ti of the subcode Q channel according to the CD signal format.
When the optical pickup 2 starts reading from the position I in FIG. 21, the light beam 3 ₁ Depending on the system, A-time = 23
Correctly recorded data from the portion of the minute 40 seconds 59 frames is read by the light beam 3 ₂ strains, A-time =
Correctly record data from 23 minutes 40 seconds 74 frames part of is read, the system of the light beam 3 _3, A-tim
e = properly record data from 23 minutes 41 seconds 14 frames part of is read, the system of the light beam 3 _4, A-t
ime = properly record data from 23 minutes 41 seconds 29 frames part of is read, the system of the light beam 3 _5, A
The recorded data is correctly read from the portion of -time = 23 minutes 41 seconds 44 frames.

[0005] rotated by CD-ROM 1 is approximately one rotation (one rotation little), the reading by the optical pickup 2 advances to the position of II in FIG. 21 (a light beam 3 ₁ to 3 ₅ are track X to (x + 4) Light beam 3
The _1, correctly recorded data to A-time = 23 minutes and 40 seconds 73 frames is read by the light beam 3 _2, correctly recorded data to A-time = 23 min 41 sec 13 frames is read by the light beam 3 ₃ , A-
time = 23 min 41 sec properly record data up to 28 frames is read by the light beam 3 _4, A-time
= 23 minutes 41 seconds 43 frames to correctly record data is read, missing in the read data by the light beam 3 ₁ to 3 ₅ are eliminated (the light beam 3 ₅ at this time A-tim
e = 23 minutes, 41 seconds, the recorded data is correctly read up to 58 frames). Reading data from the optical beam 3 ₁ to 3 _5, duplication is output to the outside in the recording order while not occurring.

Reading by the optical pickup 2 is shown in FIG.
When the optical pickup 2 reaches the position II, the optical pickup 2 is jumped by 3 tracks in the forward direction (outer peripheral direction of the CD-ROM 1). Then, the optical pickup 2 jumps to the position III in FIG. 21 (light beam 3 ₁
To 3 ₅ the track (x + 3) is irradiated with ~ (x + 7)), thereafter, it is resumed reading the data again, the light beam 3 ₁ strains, A-time = 23 min 41 sec 46 frame portion of the The recording data is correctly read from the optical beam 3 ₂ , and the recording data is correctly read from the part of the frame of A-time = 23 minutes 41 seconds 61 frames by the system of the light beam 3 _{2 and} the system of the optical beam 3 ₃ is A-time = 2.
Correctly recorded data from a portion of the 3 minutes 42 seconds 01 frames is read, the system of the light beam 3 _4, A-time
= Properly record data from 23 minutes 42 seconds 16 frames part of is read, the system of the light beam 3 _5, A-ti
The recorded data can be correctly read from the portion of me = 23 minutes 42 seconds 31 frames.

[0007] rotated by CD-ROM 1 is approximately one rotation (one rotation little), the reading by the optical pickup 2 advances to the position of IV in FIG. 21 (a light beam 3 ₁ to 3 ₅ the track (x + 4) ~ ( x + 8)), the recording data is correctly read up to A-time = 23 minutes 41 seconds 60 frames by the system of light beam 3 ₁ , and A-time = 23 minutes 42 by the system of light beam 3 _2. Second 0
0 correctly recorded data until the frame is read, the system of the light beam ₃ 3, A-time = 23 min 42 sec 15
Correctly recording the data until the frame is read, the system of the light beam 3 _4, A-time = 23 min 42 sec correctly recorded data is read up to 30 frames, omission to read data is eliminated (at this time the light beam 3 ₅ The system correctly reads the recorded data up to A-time = 23 minutes 42 seconds 45 frames). Each light beam 3 ₁ to 3 ₅
The read data by is output to the outside in the order of recording while avoiding duplication.

The reading by the optical pickup 2 is shown in FIG.
When the optical pickup 2 reaches the position IV, the optical pickup 2 is jumped by 3 tracks in the forward direction (outer peripheral direction of the CD-ROM 1). Then, the optical pickup 2 jumps to the position of V in FIG. 21 (light beams 3 _{1 to} 3
₅ the track (x + 7) is irradiated to ~ (x + 11)), thereafter, it is resumed reading the data again, the light beam 3 ₁ lineage, correctly from A-time = 23 min 42 sec 33 frame portion of the recording data is read by the light beam 3 ₂ lineages, correctly recorded data from a-time = 23 min 42 sec 48 frame portion of is read, the system of the light beam 3 _3, a-time = 2
Correctly recorded data from 3 minutes 42 seconds 63 frames part of is read, the system of the light beam 3 _4, A-time
= Correctly recorded data from the portion of 23 minutes 43 seconds 03 frames is read, the system of the light beam 3 _5, A-ti
The recorded data can be correctly read from the portion of me = 23 minutes 43 seconds 18 frames.

[0009] rotated by CD-ROM 1 is approximately one rotation (one rotation little), the reading by the optical pickup 2 advances to the position of VI of FIG. 21 (a light beam 3 ₁ to 3 ₅ tracks (x + 8) ~ ( x + 12)),
A-time = 23 minutes 42 depending on the system of the light beam 3 _1.
The recording data is correctly read up to 47 frames per _second , and the recording data is correctly read up to A-time = 23 minutes 42 seconds 62 frames by the system of light beam 32, and the A-time = 23 according to the system of light beam 3 _3. Minutes 43 seconds 0
Correctly record data up to two frames is read, the system of the light beam 3 _4, A-time = 23 min 43 sec 17
Correctly recorded data until the frame is read, missing the read data is eliminated (this time line of the light beam 3 ₅ is read correctly record data up to A-time = 23 min 43 sec 32 frames). Each light beam 3 _{1 to} 3
_The data read by ₅ is output to the outside in the order of recording while avoiding duplication.

Reading by the optical pickup 2 is shown in FIG.
The optical pickup 2 is jumped by 3 tracks in the forward direction (outer peripheral direction of the CD-ROM 1) at the position VI. Then, the optical pickup 2 jumps to the position of VII in FIG. 21 (light beam 3 ₁
To 3 ₅ is irradiated to the tracks (x + 11) ~ (x + 15)), thereafter, is resumed to read data again,
A-time = 23 minutes 43 depending on the system of the light beam 3 _1.
The recording data is correctly read from the portion of 20 frames per _second , and the recording data is correctly read from the portion of A-time = 23: 43.35 frames by the system of the light beam 3 _{2 and} the system of A of the light beam 3 ₃ is displayed. -Time = 2
Correctly recorded data from 3 minutes 43 seconds 50 frames part of is read, the system of the light beam 3 _4, A-time
= Properly record data from 23 minutes 43 seconds 65 frames part of is read, the system of the light beam 3 _5, A-ti
The recorded data can be correctly read from the portion of me = 23 minutes 44 seconds 05 frames.

[0011] rotated by CD-ROM 1 is approximately one rotation (one rotation little), the reading by the optical pickup 2 advances to the position of VIII in FIG. 21 (a light beam 3 ₁ to 3 ₅
Is irradiated to tracks (x + 12) to (x + 16)), and A-time = 23 depending on the system of the light beam 3 _1.
Correctly recording the data to the minute 43 seconds 34 frames is read by the light beam 3 ₂ lineages, correctly recorded data to A-time = 23 min 43 sec 49 frames is read, the system of the light beam 3 _3, A-time = correctly recording data up to 23 minutes 43 seconds 64 frames is read, the system of the light beam 3 _4, a-time = 23 min 44 sec 04 frame to properly record data is read, omission is eliminated to read the data (this when strains of the light beam 3 ₅ is read correctly record data up to 19 frames a-time = 23 min 44 sec). Reading data from the optical beam 3 ₁ to 3 _5, duplication is output to the outside in the recording order while not occurring.

[0012] While the optical pickup 2 is relatively one rotation from I to position II, to CD-ROM 1, the light beam 3 by ₅ lines from A-time = 23 min 41 sec 44 frames 23 minutes 41 seconds 58 The recorded data is read up to the frame, and the optical pickup 2 is the CD-ROM 1
On the other hand, during one rotation relative to the position from III to IV, A-time = 23 minutes 4 by the system of the light beam 3 _1.
The recorded data is read from 1 second 46 frames to 23 minutes 41 seconds 60 frames, and A-time = 23 minutes 4
From 1 second 46 frames to 23 minutes 41 seconds 58 frames overlap. Therefore, A-time = 23 minutes 41 seconds 4
From 6 frames to 23 minutes 41 seconds 58 frames, the data read by the system of the light beam 3 ₅ is output,
The data read by the system of the light beam 3 ₁ is discarded.

When the track is jumped from the position II in FIG. 21, the number of jumped tracks is not set to 4, but the light beam is transmitted to the track (x + 3) where the data was read by the system of the light beam 3 ₅ immediately before. In order to irradiate 3 ₁ , the number of jumping tracks is 3. The reason is that if you set the number of jumping tracks to 4,
The optical pickup 2 jumps to the position of III ′ in FIG. 21, and thereafter, the recording data is read from the frame of A-time = 23 minutes 41 seconds 61 by the system of the light beam 3 ₁ , and the light beam before the track jump. 3 ₅ the still read were not A-time = 23 min 41 sec 5
This is because data of 9 frames and 23 minutes 41 seconds 61 frames will be lost. In general, if the number of light beams is n (where n is an integer of 3 or more), the reading of approximately one rotation is performed by each light beam system, and then (n-2)
The CD-ROM 1 is reproduced at high speed by repeating a track jump in the forward direction by the number of lines and then reading the recorded data for about one rotation again.

[0014]

By the way, when the track jump is performed, the focus servo system and the tracking servo system are temporarily disturbed, so that the reading of the recording data cannot be resumed until the servo system is stabilized. Moreover, the position where the innermost light beam 3 ₁ resumes reading after completion of the track jump must be a certain length before the position where the outermost light beam 3 ₅ finishes reading before the track jump. The read data is missing. For this reason, the track jump landing point of the innermost light beam 3 ₁ should ideally coincide with the point where the outermost light beam 3 ₅ finished reading before the track jump. most prior track jump outside the light beam 3 ₅ must be long before position from the point the completion of the reading. Therefore, it takes extra time as much as the innermost light beam 3 ₁ moves to the point where the outermost light beam 3 ₅ has finished reading after the track jump landing and before the track jump. In the above-mentioned conventional optical disc reproducing method using the multi-beam method, when the number of light beams n = 5, in order to reproduce tracks (x-1) to (x + 16) in FIG. It is necessary to continuously read four rotations and perform three track jumps.
Since it takes a considerable amount of extra time for each track jump, there is a problem in that it takes a long time to reproduce data over many tracks at one time.

Also, due to variations in the track pitch of the CD-ROM 1, surface wobbling, center wobbling, and the like, it may not be possible to read recorded data by several light beam systems. In this case, as in the above-mentioned conventional technique, the reading of almost one rotation is performed by the system of each of the n light beams,
Next, in the optical disc reproducing method in which the track jump is performed in the forward direction by (n-2) lines, and thereafter, the reading of the recorded data for almost one rotation is repeated, for example, in the case of FIG. when reading the recorded data by the beam 3 ₂ strains has become impossible, approximately one revolution optical pickup 2 from the position of I in FIG. 21, when performing read recording data, a-tim
The recorded data from e = 23: 40: 74 frames to 23:41:13 frames cannot be read.

When the optical pickup 2 comes to the position II,
Since a track jump for three tracks is performed and the position jumps to position III, the recorded data from A-time = 23 minutes 40.74 frames to 23 minutes 41.13 frames remains unreadable. Even when the recorded data is read for about one rotation from the position of III, A-time = 23 minutes 41 seconds 61 frames to 23
The recorded data up to the minute 42:00 frame remains unread. Therefore, there is a problem in that the user may not be able to obtain some of the required data.

The present invention has been made in view of the above problems of the prior art.
It is an object of the present invention to provide an optical disc reproducing method and an optical disc reproducing device capable of reading data from an optical disc at a higher speed. Further, it is an object of the present invention to provide an optical disc reproducing method and an optical disc reproducing apparatus which enable acquisition of required data even if the data cannot be read by a part of the light beam. Further, it is an object of the present invention to provide an optical disc reproducing method and an optical disc reproducing device capable of efficiently reading data from an optical disc when the data cannot be read by a part of the light beams.

[0018]

In the optical disc reproducing method according to the first aspect of the present invention, every c number of optical discs having spirally formed tracks (where c is an integer of 1 or more, n Is an integer of 2 or more), each of which is separately irradiated with a separate light beam at the same time, and each of the return beams is detected separately. The recorded data is read, and continuous reading of approximately (c + 1) rotations of the optical disk in the system of n light beams is performed.
By the continuous reading, the system of each of n light beams is combined, and the forward direction of {(c + 1) · (n-1) -1} lines is obtained after the read data from the optical disk has no omission. The track jump and the above are alternately performed to reproduce the optical disc, and the n optical beams
It is not possible to read the recorded data from the optical disk in the system.
A light that can read recorded data when an effective system is created.
If there is only one beam system, track jump
Without reading the recorded data, one of the optical
The recorded data can be read continuously by the system
The feature is that the optical disc is played back.
There is.

As a result, continuous reading of approximately (c + 1) rotations of the optical disc is performed between track jumps, so that when recording data in a desired range of the optical disc is to be read,
The number of track jumps that require extra time can be reduced, and data can be quickly read from the optical disc. And the track pitch variation of the optical disk
Reading recorded data due to gutter, surface runout, center runout, etc.
Read recorded data even if only one light beam is possible
A single light beam that can be picked up from the optical disc
The necessary data can be reliably read.

[0020]

[0021]

In the optical disc reproducing method according to the second aspect of the present invention, the c of the optical disc having spiral tracks is formed.
Recorded data is obtained from detection outputs obtained by simultaneously irradiating separate light beams to n tracks (where c is an integer of 1 or more and n is an integer of 3 or more) every other line, and detecting each return beam separately. leave to read the record data recorded in the n irradiation Isa track of each light beam in the reproduction system, n
For an optical disc in the system of each of the individual light beams, approximately (c
The continuous reading for +1) rotation and the system of each of the n light beams are combined by the continuous reading, and {(c + 1). (N- 1) -1} and a track jump to the forward direction of the duty, the alternately performed without <br/> the optical disc re, in the n lines of each light beam, reading of recorded data from the optical disk When an impossible system is formed, the continuous reading rotation speed I and the number of tracks J for track jump are all or a part of the system of the light beam capable of reading recorded data, and the combination of the light beams is not only one system. If there is such a system, all or a part of the system of light beams capable of reading recorded data is assigned to the system for reading, and the system of each assigned light beam for reading is assigned. Continuous reading and J of approximately I rotations with respect to the optical disc (I is (c + 1) or more integer)
This is changed to I and J in which the read data is not lost when the track jump of this number (J is an integer not less than c and not more than {(c + 1). (N-1) -1}) is alternately repeated. According to the changed combination of I and J, continuous reading of approximately I rotations on the optical disk in each light beam system assigned for reading, and the system of each light beam assigned for reading by the continuous reading. In addition, a track jump in the forward direction for J lines after the loss of read data from the optical disc is eliminated and the optical disc is reproduced.

As a result, even if the recording data cannot be read by some light beam systems due to variations in track pitch of the optical disk, surface wobbling, center wobbling, etc., the remaining light beam of the recording data can be read. It is possible to reliably read the required data from the optical disk while preventing the omission of read data by the light beam system of the combination of all or a part of the system and not only one system.

In the optical disk reproducing method according to the third aspect of the present invention, the optical disk c having spiral tracks is formed.
Every n (where c is an integer of 1 or more, and n is 3 or more)
Simultaneous irradiation of separate light beams on each (integer) track
And record from the detection output of each return beam detected separately.
Tracks irradiated with n light beams in the data reproducing system
Read the recorded data recorded in
For an optical disc in the system of each of the individual light beams, approximately (c
+1) Continuous reading for rotation and the continuous reading
Depending on the optical system, the system of each of the n light beams can be combined to
After the read data from the disk has disappeared
Forward direction for {(c + 1) · (n-1) -1} lines
Track jump to
When a system in which the recording data from the optical disk cannot be read is created in the system of each of the n light beams after reproduction, the group of the most connected light beams of the system capable of reading the recording data If the number of light beam systems is M, and M is 2 or more, the M light beam systems are assigned to the reading system, and the optical discs of the M light beam systems assigned for reading are assigned. Almost to (c + 1)
After the continuous reading of the rotation and the continuous reading, by combining the systems of the M light beams assigned for reading, there is no omission in the read data from the optical disk {(c + 1). ( It is characterized in that the optical disk is reproduced by alternately performing M−1) −1} track jumps in the forward direction.

As a result, even if the recording data cannot be read by some light beam systems due to variations in the track pitch of the optical disk, surface wobbling, center wobbling, etc. Among them, by using a system of M light beams in which the most light beams are connected, continuous reading of approximately (c + 1) rotations and {(c + 1). (M-1) -1} By repeating the track jump alternately, it is possible to reliably and efficiently read the required data from the optical disc while preventing the read data from being lost.

In the optical disk reproducing method according to the fourth aspect of the present invention, the optical disk c having spiral tracks is formed.
Every n (where c is an integer of 1 or more, and n is 3 or more)
Simultaneous irradiation of separate light beams on each (integer) track
And record from the detection output of each return beam detected separately.
Tracks irradiated with n light beams in the data reproducing system
Read the recorded data recorded in
For an optical disc in the system of each of the individual light beams, approximately (c
+1) Continuous reading for rotation and the continuous reading
Depending on the optical system, the system of each of the n light beams can be combined to
After the read data from the disk has disappeared
Forward direction for {(c + 1) · (n-1) -1} lines
Track jump to
When a system in which the recording data from the optical disk cannot be read is created in the system of each of the n light beams upon reproduction, one of the light beams of the system capable of reading the recording data is located at the innermost side. The distance between the outermost light beams is Q in terms of the number of tracks, and among the light beams of the system in which the recorded data cannot be read, which is between the innermost and outermost light beams, If R is the number of a group of light beams connected in the largest number and Q is 2 or more and R is 0 or more, almost {(R + 1). After continuous reading of (c + 1)} rotations, the read data from the optical disk is eliminated after combining the systems of the respective light beams capable of reading the record data by the continuous reading (Q-
The feature is that the optical disc is reproduced by alternately performing 1) the track jump in the forward direction.

As a result, even if the recording data cannot be read by some light beam systems due to variations in track pitch of the optical disk, surface wobbling, center wobbling, etc., of the light beams capable of reading the recording data, The distance between the innermost and outermost light beams is Q in terms of the number of tracks, and the recorded data cannot be read because it is between the innermost and outermost light beams. Of the light beams of the system, the number of the group of light beams in which the most light beams are connected is R, and if Q is 2 or more and R is 0 or more, each system of each light beam capable of reading recorded data In order to prevent omission in the read data, the continuous reading of approximately {(R + 1) · (c + 1)} rotations of the optical disc and the track jump of (Q-1) lines are alternately repeated. Et al., The required data from the optical disc can be read reliably and highly efficiently.

[0028]

[0029]

In the optical disk reproducing method according to the fifth aspect of the present invention, the optical disk c having spiral tracks is formed.
Recorded data is obtained from detection outputs obtained by simultaneously irradiating separate light beams to n tracks (where c is an integer of 1 or more and n is an integer of 3 or more) every other line, and detecting each return beam separately. leave to read the record data recorded in the n irradiation Isa track of each light beam in the reproduction system, n
Continuous reading on the optical disk with each light beam system, and by this continuous reading, the system of each n light beam is combined, and there is no omission in the read data from the optical disk {( c + 1) ・ (n-1)
-1} track jump in the forward direction,
When an optical disk system in which the recording data from the optical disk cannot be read is created in the system of each of the n light beams, all or all of the optical beam systems capable of reading the recording data are reproduced. If there is a combination of light beam systems that is not only one system, but all or a part of the system of light beams that can read the recorded data is assigned to the read system, and the assigned read system is used. In each of the light beams of, the distance between the innermost side and the outermost side of the optical disc is Q, which is the number of tracks, and continuous reading on the optical disc is performed by the system of each light beam assigned for reading. , By the continuous reading,
The optical discs are made to alternately perform (Q-1) track jumps in the forward direction after the read data from the optical disc has been completely eliminated by combining the systems of the respective light beams assigned for reading. The feature is that it is made to play.

As a result, even if the recording data cannot be read by some light beam systems due to variations in the track pitch of the optical disk, surface wobbling, center wobbling, etc. If there is a combination of all or part of the light beam systems that is not only one system, then all or part of the system of light beams capable of reading the recorded data is assigned to the reading system and assigned. Of the reading light beams, the distance between the innermost and outermost sides of the optical disc is Q, which is the number of tracks, and continuous reading is performed on the optical disc by the system of each light beam assigned for reading. Then, by the continuous reading, the system of each light beam assigned for reading is combined to read the data from the optical disk. The missing lost after (Q-
1) By repeating the track jump for the number of tracks alternately, while preventing omission in the read data,
The required data can be read reliably and very efficiently from the optical disc.

[0032]

[0033]

In the optical disk reproducing apparatus according to the sixth aspect of the present invention, the optical disk c having spiral tracks is formed.
Every n (where c is an integer greater than or equal to 1 and n is greater than or equal to 2)
Simultaneous irradiation of separate light beams on each (integer) track
Optical detection to detect and output each return beam separately
Means and the detection output of the optical detection means, each of the n optical lights is detected.
Read the recorded data recorded on the optical disc for each system
Recording data reproduction means, optical detection means and recording data
The light in the system of each of the n light beams is controlled by controlling the data reproducing means.
Continuous reading of almost (c + 1) rotations on the disc
And each of the n light beams by the continuous reading.
To match the system of the
{(C + 1) ・ (n-1)-
1} track jump in the forward direction,
Playback control means for playing back the optical disk alternately
When, in the n-number of lines of each light beam, and discriminating means for discriminating whether unreadable systems of recording data from the optical disk is present, the provided, the reproduction control means reads in the determination means non light beam If it is determined that there is only one system of readable light beam of the record data, the optical detecting means and the record data reproducing means are controlled during reproduction, and the track jump is not performed. The present invention is characterized in that the recording data is continuously read by one light beam system out of the readable recording data to reproduce the optical disk.

As a result, at the time of reproduction, it is referred to as an optical detection means.
Controls the recording data reproducing means, and the system of each n light beams
Continuous (c + 1) rotations of the optical disk of
By reading and the continuous reading, each of the n optical beams is read.
Read the data from the optical disc by matching the system of the system.
{(C + 1) ・ (n-1) after the data is missing
-1} track jump in the forward direction,
Track jump and track jump
Almost (c + 1) rotations of the optical disc between the pumps
Minute is read continuously, it may
When trying to read the recorded data in the desired range,
Light track with fewer track jumps
Data can be quickly read from the disc.
Further, it is determined whether or not there is a system in which the recording data from the optical disk cannot be read in the system of each of n light beams, and when it is determined that there is a system in which the light beam cannot be read,
If there is only one optical beam system that can read the recorded data, track jump is not performed, and the optical data system that can read the recorded data continuously reads the recorded data and reproduces the optical disc. As a result, variations in the track pitch of the optical disc, surface wobbling,
Even if there is only one light beam that can read the recorded data due to misalignment or the like, the one data beam that can read the recorded data can surely read the required data from the optical disc.

In the optical disk reproducing apparatus according to the seventh aspect of the present invention, the optical disk c having spiral tracks is formed.
Optical detection in which every n tracks (where c is an integer of 1 or more and n is an integer of 3 or more) are simultaneously irradiated with different light beams, and each return beam is detected and output separately. Means for controlling the recording data reproducing means for reading the recording data recorded on the optical disk for each system of the n light beams from the detection output of the optical detecting means and the optical detecting means and the recording data reproducing means. The continuous reading of approximately (c + 1) rotations of the optical disk with each of the light beam systems, and the system of each of the n light beams is combined by the continuous reading, and the read data from the optical disk is lost. {(C + 1) ・ (n-1)-after the disappearance of
1} track jumps in the forward direction are alternately provided, and reproduction control means for reproducing the optical disc is provided, and further, recording data from the optical disc is provided in the system of each of the n light beams. Determination means for determining whether there is an unreadable system, and when the determination means determines that there is an unreadable system for the light beam, it is the whole or a part of the system for the readable light beam for the recorded data. If there is a system using a combination of light beams other than only one system, an allocation unit that allocates all or a part of the system of the light beams capable of reading the recorded data to the system for reading is provided, and the reproduction control unit includes: When the discriminating means discriminates that there is an unreadable optical beam system, the continuous reading rotational speed I at the time of reproduction and the track book for performing the track jump. Regarding J, depending on the system of each reading light beam assigned by the assigning means, continuous reading of approximately I rotations (I is an integer of (c + 1) or more) and J readings (J is c or more, {(C +
1) · (n-1) -1} or less) is changed to I and J that do not cause missing in read data when the track jump of () is optically repeated according to the changed combination of I and J. Controlling the detecting means and the recorded data reproducing means,
A series of reading light beams assigned by the allocating means to the optical disc for continuous reading of approximately I rotations, and a system of reading light beams assigned by the allocating means by the continuous reading. In addition, a track jump in the forward direction for J lines after the loss of read data from the optical disc is eliminated and the optical disc is reproduced.

As a result, it is determined whether or not there is a system in which the recording data from the optical disk cannot be read in the system of each of the n light beams, and when it is determined that there is a system in which the light beam cannot be read, the recording is performed. If all or part of the data beam system that can read data, and if there is a system that uses a combination of light beams that is not only one system, then all or part of the system that can read the recorded data Regarding the continuous reading rotation speed I during reproduction and the track number J for track jumping, which is assigned to the reading system, a continuous almost I rotation (I is Reading of an integer of 1 or more and J lines (J is 1 or more, (n
-2) The following integers) are changed to I and J so that no omission occurs in the read data when the track jump is alternately repeated, and the optical detection means and the recorded data reproduction means are changed according to the changed combination of I and J. By controlling the continuous reading of approximately I rotations of the optical beam in the system of each light beam assigned for reading and the system of each light beam assigned for reading by the continuous reading. Since the optical disc is played back by alternately performing the J track jumps in the forward direction after the read data from the optical disc has been eliminated, the optical disc track pitch variation, surface deviation, and center Even if the recording data cannot be read with some light beam systems due to shake, etc., the remaining recording data can be read. All or part of the possible light beam systems, and the combination of light beam systems that is not only one system, makes it possible to reliably read the required data from the optical disc while preventing omission of read data. .

In the optical disc reproducing apparatus according to the eighth aspect of the present invention, the discriminating means for discriminating whether or not there is a system in which the recording data from the optical disc cannot be read in the system of each of the n light beams, and the discriminating means. When it is determined that there is a system of unreadable light beams, M is 2 or more, where M is the number of systems of a group of light beams that are most connected among the systems of light beams that can read recorded data. If there is an allocation means for allocating the system of the M light beams to the system for reading, the reproduction control means, when the discrimination means discriminates that there is a system of unreadable light beams, the allocation means M When the reading light beam system is assigned, the optical detecting means and the recorded data reproducing means are controlled during reproduction, and the M reading optical beams assigned by the assigning means are controlled. The continuous reading of approximately (c + 1) rotations of the optical disc in the optical system and the system of each of the M light beams for reading assigned by the assigning means are combined by the continuous reading. {(C +
1). (M-1) -1} track jumps in the forward direction are alternately performed to reproduce the optical disc.

Thus, it is determined whether or not there is a system in which the recording data from the optical disk cannot be read in the system of each of the n light beams, and when it is determined that there is a system in which the recording data can be read. Let M be the number of groups of a group of light beams that are most connected in the system, and if M is 2 or more, the system of M light beams is assigned to a reading system, and is assigned to a reading system. Approximately (c +
1) Continuous reading for rotation, and by the continuous reading, the system of each reading light beam assigned for reading is combined, and the read data from the optical disk is not lost. {(C + 1 ) ・ (M-1)
-1} track jump in the forward direction,
Since the optical disc is played back alternately by repeating the steps, even if the recorded data cannot be read by some optical beam systems due to variations in the track pitch of the optical disc, surface wobbling, center wobbling, etc., there is a gap in the read data. It is possible to reliably and efficiently read the required data from the optical disc while preventing the occurrence of the error.

In the optical disc reproducing apparatus according to the ninth aspect of the present invention, the discriminating means for discriminating whether or not there is a system in which the recording data from the optical disc cannot be read in the system of each of the n light beams, and the discriminating means. When it is determined that there is an unreadable optical beam system, the distance between the innermost and outermost optical beams of the system that can read the recorded data is Q And R is the number of the group of light beams that are most connected among the light beams of the system between the innermost light beam side and the outermost light beam side where recording data cannot be read, If Q is 2 or more and R is 0 or more, setting means for setting I = {(R + 1) · (c + 1)} as the continuous reading rotation speed and J = (Q−1) as the number of tracks for track jump. The reproduction control means is If there is an unreadable optical beam system by the means, if R and J are set by the setting means, at the time of reproduction, the optical detection means and the recorded data reproducing means are controlled, and the recorded data can be read. The continuous reading of each light beam from each system for approximately I rotations on the optical disk, and the system of each light beam capable of reading the record data is combined into the read data from the optical disk by the continuous reading. It is characterized in that the optical disc is reproduced by alternately performing J track jumps in the forward direction after disappearance.

With this, it is determined whether or not there is a system in which the recording data from the optical disk cannot be read in the system of each of the n light beams, and when it is determined that there is a system in which the recording data can be read. The distance between the innermost and outermost light beams of the beam is Q in terms of the number of tracks, and the recording data exists between the innermost and outermost light beams. Let R be the number of the group of light beams that are most connected among the light beams of the system in which is not readable, and if Q is 2 or more and R is 0 or more, I = {(R + 1). (C +
1)} is set as the continuous reading rotation speed, and J = (Q-1) is set as the number of tracks to perform the track jump, and continuous I rotations for the optical disk in the system of each light beam capable of reading the recording data. Alternate between reading and track jumping in the forward direction for J lines after the read data from the optical disk has been eliminated by matching the system of each light beam capable of reading the recorded data by the continuous reading. Since the optical disc is played back, the variation of the track pitch of the optical disc,
Even if recording data cannot be read by some light beam systems due to surface wobbling or center wobbling, necessary data can be read reliably and very efficiently from the optical disc while preventing omission of read data. be able to.

[0042]

[0043]

[0044] In the optical disk reproducing apparatus according to claim 1 0, wherein the present invention, c present every n number of the optical disc formed of track spiral shape (however, c is an integer of 1 or more, n represents an integer of 3 or more ) Each of the tracks is irradiated with a separate light beam at the same time, and each return beam is detected and output separately, and from the detection output of the optical detection means, each of the n light beams is classified by system. The recording data reproducing means for reading the recording data recorded on the optical disc, the optical detecting means and the recording data reproducing means are controlled to continuously read the optical disc by the system of each of n light beams and the continuous reading. After reading, the system of n respective light beams is combined, and the track data in the forward direction for {(c + 1) · (n−1) −1} lines after the loss of read data from the optical disk is eliminated. And a reproduction control means for reproducing the optical disc by alternately performing the pumping and discriminating whether or not there is a system in which the recording data from the optical disc cannot be read in the system of each of the n light beams. When it is determined that there is a system of light beams that cannot be read by the determination means and the system of determination, there is a combination of light beams that are all or a part of the system of light beams that can read the recorded data, and not only one system. If there is a system, one or all of the optical beam system capable of reading the recorded data is assigned to the reading system and the reading optical beam assigned by the allocating unit is one of the optical discs. A setting procedure for setting the distance between the innermost circumference side and the outermost circumference side as Q in number of tracks, and setting J = (Q-1) as the number of tracks to perform a track jump. When the discriminating means discriminates that there is an unreadable optical beam system, the reproducing control means controls the optical detecting means and the recorded data reproducing means, and each of the reading means allocated by the allocating means. After the continuous reading on the optical disc with the system of light beams and the system of each light beam for reading assigned by the assigning means by the continuous reading, there is no omission in the read data from the optical disc. The optical disc is played back by alternately performing the J track jumps in the forward direction.

As a result, it is determined whether or not there is a system in which the recording data from the optical disk cannot be read in the system of each of the n light beams. When it is determined that there is a system in which the recording data can be read. If there is a combination of all or part of the light beam systems that is not only one system, then all or part of the system of light beams capable of reading the recorded data is assigned to the read system, Of the assigned reading light beams, the distance between the innermost side and the outermost side of the optical disc is set as Q, and J = (Q-1) is set as the number of tracks for track jump. Then, the continuous reading on the optical disc in the system of each light beam assigned for reading and the reading assigned by the assigning means by the continuous reading The track pitch of the optical disk is adjusted because the optical disk is reproduced by alternately performing the track jump in the forward direction for J lines after the loss of read data from the optical disk by matching the system of each light beam. Even if the recorded data cannot be read by some light beam systems due to variations, surface wobbling, center wobbling, etc., the necessary data from the optical disk can be reliably and very efficiently made while preventing omission of read data. I can read it well.

In the first to fifth aspects, the recording data reproducing system may output the recording data read for each system of each light beam in the recording order on the optical disc while avoiding duplication and omission. Similarly, claims 6 to 1
In 0 , the recording data reproducing means may output the recording data read for each system of each light beam in the order of recording on the optical disc while avoiding duplication and omission.

[0047]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of a CD-ROM reproducing apparatus which embodies an optical disk reproducing method according to the present invention, and the same components as those in FIG. 21 are designated by the same reference numerals. In FIG. 1, reference numeral 1 is a CD-ROM in which data recording tracks are formed in a spiral shape (see FIG. 1).
The left side is the inner circumference side, and the right side is the outer circumference side). The CD-ROM 1 is rotated at a constant linear velocity by a spindle motor (not shown). Reference numeral 2 denotes a multi-beam type optical pickup, which is C
The c-th track of the D-ROM ₁ is simultaneously irradiated with the light beams 3 _{1 to} 3 _n at the same time (the total number of the tracks irradiated with the light beam is n), and each return beam is irradiated with a separate photodetector PD. _{1 to} PD _n detect (receive light),
It outputs a photocurrent as a detection signal. Here, c is an integer of 1 or more, and n is an integer of 3 or more, and here, as an example, c = 1 and n = 5 (see FIG. 4).

Of the optical pickup 2, 4 is a laser diode, which emits a laser beam 3. Reference numeral 5 is arranged perpendicular to the optical axis of the laser diode 4, diffracts the laser beam 3, and the light beam 3 ₁ is the −2nd order diffracted light, the light beam 3 ₂ is the −first order diffracted light, and the 0th order diffracted light. Beam 3 ₃ , a grating (diffraction grating) that forms a light beam 3 ₄ that is a + 1st-order diffracted light, and a light beam 3 ₅ that is a + 2nd-order diffracted light, 6 is a beam splitter in which two right-angle prisms are bonded, and 7 is each beam a collimator lens for collimating light from the diffusion light, 8 the light beams 3 ₁ to 3 ₅ passed through the beam splitter 6 and collimator lens 7 CD-RO
Objective lens for focusing on signal surface 1A of M1, 9 is CD-
The objective lens 8 is moved to the CD-RO by following the surface deflection of the ROM1.
M1 of moving vertically, CD-ROM 1 the light beam 3 regardless to the surface runout of _{1-3 5} focus actuator for maintaining a focus state with respect to the signal surface 1A of 10
Follows the center deviation of the CD-ROM 1 and moves the objective lens 8 to C
It moves in the radial direction with respect to D-ROM1, and CD-ROM1
This is a tracking actuator for correctly tracing a track on each of the beams 3 _{1 to} 3 ₅ regardless of the center runout. The focus actuator 9 and the tracking actuator 10 are individually driven by a servo circuit described later.

PD₁~ PD_FiveAre each a light beam 3₁~ 3
_FiveIt is a photodetector provided individually for
Output a photocurrent proportional to the amount of received light. Light beam
Three₁Three₂Three_FourThree_FiveIs the signal side 1A of CD-ROM1
Each return beam reflected by the objective lens 8, collimator
After passing through the lens 7, it is reflected by the beam splitter 6 and
Optical system such as a cylindrical lens and a detector lens (Fig.
After passing through (not shown), individual photo detector PD₁
~ PD_FiveIncident on. Photo detector PD₁, P
D ₂, PD_Four, PD_FiveIs the photocurrent I proportional to the amount of received light₁,
I₂, I_Four, I_FiveLight beam 3₁~ 3_FiveEach return
It is output as a detection signal of the frame. Photo detector PD
₃Is used for ordinary 1-beam type optical pickups.
Is a four-division photodiode similar to that
Light proportional to the amount of received light for each of the B, C, and D split diodes
Current I₃-A, I₃-B, I₃-C, I₃Output -D
It

Reference numeral 11 denotes a sled motor for moving the optical pickup 2 in the radial direction of the CD-ROM 1 at the time of reproduction or search, which is driven by a servo circuit and desired to make the optical pickup 2 forward or reverse during search. When moving to the position or playing, CD-RO
As the reproduction of M1 progresses, the optical pickup 2 is gradually moved in the forward direction.

Reference numeral 20 denotes a recording data reproducing system, which is an optical pick.
Up 2 photo detector PD ₁~ PD_FiveLight reception of
Each light beam from power 3₁~ 3_FiveOn the illuminated track of
Recorded recorded data is read at the same time, and duplication and
Recording order on the CD-ROM1 while ensuring that there are no gaps
Output serially to. This recorded data reproducing system 20
Of which, 21₁, 21₂, 21_Four, 21_FiveEach is a photo
Detector PD₁, PD₂, PD_Four, PD_FiveIs output from
Photocurrent I₁, I₂, I_Four, I_FiveCurrent / voltage conversion,
Light beam 3₁Three₂Three_FourThree_FiveRF signal R corresponding to
F₁, RF₂, RF_Four, RF_FiveOutput current / voltage change
Exchanger (I / V), 21₃-A, 21₃-B, 21₃−
C, 21₃-D is the photo detector PD₃Out of
Forced photocurrent I₃-A, I₃-B, I₃-C, I₃−
D is converted to current / voltage and voltage value V_A, V_B, V_C, V_D
Is a current / voltage converter (I / V) that outputs

Reference numeral 22 denotes an arithmetic unit, which is (V _A + V _B + V _C
And it outputs the RF signal RF ₃ corresponding to the light beam 3 ₃ + performs calculation of _{V D), (V A +} V C) - (V B +
V _D ) is calculated and a focus error signal FE is output, and (V _A + V _B ) − (V _C + V _D ) is calculated and a tracking error signal TE is output. 23 focus servo control, tracking servo control, a servo circuit which performs sled servo control, based on the focus error signal FE, a light beam 3 ₁ to 3 ₅ drives the focus actuator 9 such that the FE becomes zero It is focused on the signal surface 1A, based on the tracking error signal TE, respectively the light beam 3 ₁ to 3 ₅ by driving the tracking actuator 10 so that the TE is zero, causes follow the corresponding track (on-track) .

24 _{1 to} 24 ₅ are light beams 3 ₁ to 3 respectively.
_This is a waveform equalization circuit that suppresses the occurrence of intersymbol interference by raising the high frequency components of the RF signals RF ₁ to RF ₅ in order to compensate for the high frequency attenuation due to the spatial transfer frequency characteristic (MTF) of ₅ .
Incidentally, RF signal RF ₃ input to the waveform equalization circuit 24 ₃
Alternatively, the RF signal RF output from the waveform equalization circuit 24 _3
3 is input to the servo circuit 23. When turning on the focus servo, the servo circuit 23 turns on the servo by performing a focus search operation and determining the timing when the value of the focus error signal FE is within the negative feedback region of the focus servo. When the tracking servo is turned on, the timing of the light beam 3 ₃ entering the negative feedback region of the tracking servo is determined by using the RF signal RF ₃ and the servo is turned on.

26₁~ 26_FiveIs a first signal processing circuit
RF signal RF₁~ RF_FiveEnter the binary
, Clock recovery using a PLL circuit, bit demodulation,
Performs frame synchronization detection, EFM demodulation, subcode demodulation,
Data after EFM demodulation (however, including P and Q parity)
DATA₁~ DATA_Five1 block unit (1 sub code frame
The corresponding sub-code in units of 98 frames)
A-time data AT of terminal Q channel₁~ AT_Five
Output with. First signal processing circuit 26₁~ 26 _FiveIs
Data after demodulation DATA₁~ DATA_Five1 symbol (8 bits
Output) serially. First signal processing circuit 26₁
~ 26_FiveWhen the frame synchronization is detected, the system
Frame controller H-level frame sync detection signal FS
₁~ FS_FiveIs output. This frame sync detection signal FS
₁~ FS_FiveIs the light beam 3₁~ 3_FiveOf data by system
Used to determine whether it is readable or unreadable
It First signal processing circuit 26₃A-tim output from
e data AT₃Is also input to the system controller.
RF signal RF₃Signal processing circuit 26 of the system₃In
Make sure that the frame sync signal is detected at regular time intervals.
CLV control circuit (not shown) for
CLV for the spindle motor drive circuit (not shown)
The CD-ROM 1 is controlled to rotate at a constant linear velocity.
It

Reference numeral 30 is each of the first signal processing circuits 26 _{1 to} 26 _5.
The parallel / serial conversion unit (P which outputs the data in units of one block in parallel from the
/ S). FIG. 2 shows a specific configuration of the parallel / serial conversion unit 30. In FIG. 2, 32 _{1 to} 32
₅ each having two storage areas in the first region and the second region is a memory provided corresponding to the first signal processing circuit 26 ₁ to 26 _5, the first signal processing circuit 26 ₁ to 26 _The data DATA _{1 to} DATA ₅ output from ₅ are stored in one of the storage areas. The first area and the second area have a capacity capable of storing a sufficient number of block units of data DATA _{1 to} DATA ₅ . 33 _to 333 ₅ each having two storage areas in the first region and the second region, the first signal processing circuit 26 21 _to
6 ₅ a memory provided correspondingly, the A-time data AT ₁ to AT ₅ output from the first signal processing circuit 26 ₁ to 26 _5, respectively, the corresponding data DATA ₁ to Data
With ₅ of the memory 32 _{1-32 5} head address A _1S to A indicating the storage position in _5s (or a _1s ~a _5s) end address A _1e to A _5e (or a _1e ~a _5e), either It is stored in one of the storage areas. The first and second areas has a capacity capable of storing A-time data AT ₁ to AT ₅ of a sufficient number.

[0056] 31 _{1-31 5} each is a write controller provided corresponding to the first signal processing circuit 26 ₁ to 26 _5, the data DATA ₁ output from the first signal processing circuit 26 ₁ to 26 ₅ writes to data ₅ in the first region or the second region of the memory 321 _to 323 _5, stored the a-time data AT ₁ to AT ₅ in the memory 321 _to 323 ₅ of the corresponding data dATA ₁ to data _{5 Start} address A _{1s to} A _5S (or a _{1s to} a _5s ) indicating the position and end address A
_{1e to} A _5e (or a _{1e to} a _5e ) together with the memory 33 ₁ to
33 ₅ is written in the first area or the second area.

For example, the write controller 31 _f (f
= 1 to 5) writes 15 blocks of data DATA _f (1) to DATA _f (30) in the first area of the memory 32 _f ,
15 blocks of data DATA _f (31) to DATA in the area
FIG. 3 shows the stored contents of the memories 32 _f and 33 _f when _f (60) is written. In the first area of the memory 33 _f , there is A for each block of data DATA _f (1) to DATA _f (30).
-Time data is written as, for example, 23 minutes 40 seconds 60 frames to 23 minutes 41 seconds 14 frames, and the data DATA _f (1) to DATA _f (3 in the first area of the memory 32 _{f is} written.
The start address A _fS (1) and the end address A _fe (1) to the start address A _fS (30) and the end address A _fe (30) indicating the storage position of 0) are written. In the second area of the memory 33 _f , data DATA _f (31) to DATA
A-time data relating to each block of _f (60) is written as, for example, 23 minutes 42 seconds 48 frames to 23 minutes 43 seconds 02 frames, and the data DATA _f (31) to the second area of the memory 32 _f . The start address a _fS (1) and the end address a _fe (1) to the start address a _fS (30) and the end address a _fe (30) indicating the storage position of DATA _f (60) are written. .

[0058] 34 is a read controller, the memory 33 _to 333 ₅ to the stored A-time data AT
_{1 to} AT ₅ and start address A _{1s to} A _5s (or a _1s to
a _5s ) and the last address A _{1e to} A _5e (or a _1e to
Referring to a _5e), a memory 321 _to 323 the data DATA ₁ to Data ₅ stored in _5, while allowing overlap and omission does not occur, the recording order on the CD-ROM1 (A-time
In sequence) and serially output one symbol at a time.
It will be specifically described later operation of the write controller 31 _{1-31 5} and read controller 34.

Returning to FIG. 1, reference numeral 40 denotes a second signal processing circuit, which receives the data serially output from the parallel / serial conversion section 30 and descrambles each block first, and then converts it into a CIRC code. CD based on error detection / correction (error detection / correction by P parity, deinterleave, error detection / correction by Q parity)
-Lch data and Rch data that comply with the DA standard are demodulated, and a CD is created from these Lch data and Rch data.
-Based on ROM standards, sync detection, descrambling,
CD-ROM data is demodulated by header detection and error detection / correction by EDC and ECC codes, and output to an external host computer.

Reference numeral 50 denotes a system controller having a microcomputer configuration. When performing a search, the servo controller 23 is provided with a search command to drive the sled motor 11 to drive the optical pickup 2 in the forward direction of the CD-ROM 1. is moved to a desired position in the reverse direction, during reproduction, given the various servo-on commands to the servo circuit 23, while focusing the light beam 3 ₁ to 3 ₅ on the signal surface 1A of the CD-ROM 1, and, c = 1 this Every other n = 5 tracks are set to the on-track state. Then, every time the recording data is read from each track by an appropriate number of rotations of two or three or more, a track jump command of a predetermined number of tracks in the forward direction is given to cause a track jump.

[0061] Also, when the system controller 50 reproduction start to monitor during the frame sync detection signals FS ₁ ～FS ₅ input from the first signal processing circuit 26 ₁ to 26 ₅ to CD-ROM 1 is rotated once, CD-ROM 1 track pitch variation, surface vibration, by the like runout, for any system of the light beam 3 ₁ to 3 _5, and checks whether the or not there shall read the data is no longer possible, the frame When all the synchronization detection signals FS _{1 to} FS ₅ are H and there is no data read failure, the normal write / read command is given to the parallel / serial conversion unit 30, and the first signal processing circuit 26 ₁
The data DATA _{1 to} DATA ₅ output from all of the memory devices 26 to 26 ₅ cause the memories 32 _{1 to} 32 ₅ to write and read.

On the other hand, when the frame synchronization detection signal for any one or a plurality of light beams is L for a fixed time or longer (for example, 1/75 seconds or longer), and data cannot be read, from among the light beams 3 ₁ to 3 _5, the light beam 3 _i used to read data,
3 _j , 3 _k , ... And special writing, which includes read system information “i, j, k, ...”, which indicates the system of the light beam used for data reading, to the parallel / serial conversion unit 30. A read command is given, and the first signal processing circuit 2
6 _1-26 of _5, the first signal processing circuit 26 according to the reading line _i, 26 _j, 26 _k, the output data DATA _i from ..., DATA _j, DATA _k, memories 32 ₁ to the ..
Write / read to 32 ₅ .

Output from the system controller 50
Normal read / write command or special write / read
The output command is read by the parallel / serial conversion unit 30.
While being input to the controller 34,
Controller 34 to write controller 31₁~ 31
_FiveTransferred to. Write controller 31₁~ 31 _Five
Receives a normal write / read command at the start of playback
And the first signal processing circuit 26₁~ 26_FiveOutput from all
Data DATA₁~ DATA_FiveMemory 32 at the beginning
₁~ 32_FiveWrite to the first area of the
Writing is interrupted when a suspend command is received from the tracker 34.
Then, when the restart command is received, the second area opposite to the previous one
, And then do the same in the same way
Then, the writing is interrupted, and when the restart command is received, the first area
Write in the area opposite to the previous one in the second area.

However, the write controllers 31 _{1 to} 31
_{When 5} receives a special write / read command at the start of reproduction, only the first signals corresponding to the write controllers 31 _i , 31 _j , 31 _k , ... Shown by the read system information “i, j, k, ...” Processing circuits 26 _i , 26 _j , 26 _k ,
.. The data DATA _i , DATA _j , and DATA _k output from are first written in the first areas of the memories 32 _i , 32 _j , 32 _k , ... Then, when the restart command is received, writing is performed in the second area opposite to the previous time, and in the same manner, when the interrupt command is received, the writing is interrupted, and when the restart command is received, the first area Write in the area opposite to the previous one in the second area.

The read controller 34 is a system controller.
Normal write / read command from the controller 50 (special
When receiving a write / read command), the memory 33₁
~ 33_Five(33_i, 33_j, 33_k, ...) first area
In the second area, this time, the write controller 31₁~
31_Five(31_i, 31_j, 31_k, ...) written by
A indicated by the A-time data stored in the embedded area
-There is nothing missing in the time and all are continuous
Write controller 31₁~ 31
_Five(31_i, 31_j, 31_k, ...) is given an interruption command
Eh, give a jump command to the system controller 50,
Memory 33₁~ 33_Five(33_i, 33 _j, 33
_k, ...) Of the first and second areas, this time, write
A-time data and head address stored in the reserved area
Memory 32 by referring to the address₁~ 32
_Five(32_i, 32_j, 32_k, ...) first area and second area
Of the areas, the data in the area written this time is targeted
From the data corresponding to the youngest A-time, A-tim
The data is read and output in the order of e.

[0066] When this later, to enter a jump completion notification from the system controller 50, giving the resume command to the write controller _{31 1 ~31 5 (31 i,} 31 j, 31 k, ··), itself, the memory 33 ₁ to 33 ₅ (3
3 _i , 33 _j , 33 _k , ...) Of the first and second areas, the A-ti stored in the area opposite to the previous time is stored.
Write controllers 31 _{1 to} 31 ₅ (31 _i , 31 _j , 31 _k , ...) When no A-time indicated by the me data is missing and all are in a continuous state
Gives an interruption command to give a jump command to the system controller 50, itself memory 33 ₁ ~33 ₅ (33 _i,
33 _j , 33 _k , ...) Of the first area and the second area, A− stored in the area opposite to the previous area is stored.
The memories 32 _{1 to} 32 ₅ (32 _i , 32 _j , 32) are referred to by referring to the time data and the start address and the end address.
_k , ...) Of the 1st area and the 2nd area, the data written in the area opposite to the previous time is targeted, and the data for one block last output to the second signal processing circuit 40 is selected last time. From the data corresponding to the A-time next to the corresponding A-time, the data is read and output in the A-time order. Hereinafter, the same operation is repeated.

Next, the operation of the above-described embodiment will be described with reference to FIGS. In addition, CD-ROM in advance
It is assumed that 1 is rotating at a constant linear velocity by CLV control, and that the focus servo is also on. Further, with respect to n = 5 tracks of c = 1 every other CD-ROM 1, each independently assume the light beam 3 ₁ to 3 ₅ are simultaneously irradiated. (1) Discrimination of Unreadable System The system controller 50 uses the host computer (not shown) to indicate the playback start point A- for the CD-ROM 1.
For example, when the time is specified as 23 minutes 41 seconds 00 frames, the reproduction start point A- is displayed on the CD-ROM 1.
The position of the track including the time is determined and designated as x (see FIGS. 4, 6, 8, 10 to 12, 14 to 16, and 18). Then, first, it is given a search command to the servo circuit 23 to move the optical pickup 2 so that the light beam 3 ₁ comes to the position of the track (x-8), after accordingly,
A tracking servo ON command and a sled servo ON command are given to the servo circuit 23 to turn on the tracking servo and the sled servo. As a result, the light beam 3 ₁ to 3 ₅ emitted from the optical pickup 2 tracks (x-
8), (x-6), (x-4), (x-2), and on-track to x (FIG. 4, FIG. 6, FIG. 8, FIG. 10 to FIG. 12, FIG. 14 to FIG. 16). , I in FIG. 18).

Each light beam 3₁~ 3_FiveIs reflected on the signal surface 1A
The returned return light is a photo detector PD₁~ PD_FiveBut
Receives light and photocurrent I₁~ I_FiveOf the photo data
Detector PD₁, PD₂, PD_Four, PD_FivePhotocurrent from
I₁, I₂, I_Four, I_FiveIs a current / voltage converter 21₁Two
1₂, 21_Four, 21_FiveRF signal RF₁, RF₂,
RF_Four, RF_FiveTo the waveform equalization circuit 2
Four₁, 24₂, 24_Four, 24_FiveAfter waveform equalization with,
First signal processing circuit 26₁, 26₂, 26_Four, 26 _FiveEnter
I will be forced. In addition, the photo detector PD₃Photocurrent from
I₃-A to I₃-D is a current / voltage converter 21₃-A ~ 2
1₃Voltage value V by -D_A~ V_DIs converted into
RF signal RF added by 2₃Is created. And
Waveform equalization circuit 24₃Waveform equalization by the first signal processing
Logic circuit 26₃Entered in.

The first signal processing circuits 26 _{1 to} 26 ₅ are, respectively,
Binarization, PL for the input RF signals RF ₁ to RF ₅
Clock reproduction using the L circuit, bit demodulation, frame synchronization detection, EFM demodulation, sub-code demodulation, and data after EFM demodulation (however, including P and Q parity) DATA ₁ ~
DATA ₅ is output in block units together with the corresponding sub-code Q channel A-time data AT _{1 to} AT ₅ . The first signal processing circuits 26 _{1 to} 26 ₅ serially output the demodulated data DATA _{1 to} DATA ₅ one symbol (8 bits) at a time. Also, the first signal processing circuits 26 _{1 to} 26 ₅
Detects the frame synchronization, the system controller 5
The H-level frame synchronization detection signals FS _{1 to} FS ₅ are output to 0.

[0070] The system controller 50 is the light beam 3 ₁ to 3 ₅ of the optical pickup 2 by the search operation is the track (x-8), (x -6), (x-4), (x-2),
After on-tracking to x, the first signal processing circuit 26 _1-
26 frames input from ₅ sync detection signal FS ₁ ~FS
_The recorded data is monitored depending on whether or not there is a system that keeps the L level for a certain time or more (here, 1 block = 1/75 seconds or more) while monitoring ₅ and making one rotation of the CD-ROM 1. Determine whether there is an unreadable system of.

[0071] (2) the normal write and read operations (Fig. 4, see FIG. 5) First, record data by all strains of the light beam 3 ₁ to 3 ₅ will be described when readable. If there is no system in which the recorded data cannot be read by determining whether there is a system in which the recorded data cannot be read, all _five light beams 3 _{1 to} 35 are assigned as the system of h light beams for reading, and , The number of rotations for continuous reading during reproduction I = (c + 1)
= 2, the number of tracks J jumping during playback
= {(C + 1). (N-1) -1} = 7. Then, the latest A- input from the first signal processing circuit 26 ₃
A-time data indicated by the time data AT ₃ and the reproduction start point A-t designated by the host computer.
From image and h of 5 light beams for reading,
The track jump direction for causing the innermost light beam 3 ₁ to be on-track to one track (x−1) on the inner circumference side of the track x including the reproduction start point A-time, and the number of tracks to jump Set and make a track jump.

At the time when the system of h light beams for reading is assigned and the continuous reading rotation speed I during reproduction and the number J of tracks for track jump during reproduction are set, the optical pickup 2 moves to II of FIG. If it is at the position, the tracks are jumped from the position II in the forward direction by 6 tracks, and the light beams 3 _{1 to} 3 ₅ are respectively moved to the tracks (x−1), (x + 1), (x + 3), (x +).
5), (x + 7) is turned on track (see III in FIG. 4), and the photodetector PD ₁ to the first signal processing circuit 26
₁ , photodetector PD ₂ to first signal processing circuit 2
6 ₂ , photo detector PD ₃ to first signal processing circuit 26
₃ , photodetector PD ₄ to first signal processing circuit 2
6 ₄ , photo detector PD ₅ to first signal processing circuit 26
By ₅ 5 strains of the track (x-1), (x + 1),
Simultaneous reading of print data of (x + 3), (x + 5), and (x + 7) is started. Then, the first signal processing circuit 2
6 _1-26 frames from all ₅ sync detection signals FS ₁ ~
When FS ₅ is input, a normal write / read command is given to the parallel / serial conversion unit 30.

The write controller 3 which has received a normal write / read command via the read controller 34.
1 _{1-31 5} each, the first signal processing circuit 26 ₁ to 26
The data DATA ₁ to Data ₅ output from the _5-by-block of written sequentially to the first area of the memory 321 _to 323 _5,
And, in a first region of the memory 33 _to 333 _5, data DATA
A-time data AT _{1 to} AT corresponding to _{1 to} DATA _5
5 and the start address A _1S in the memories 32 _{1 to} 32 ₅
A _5S and the last address A _{1e to} A _5e are written as a pair (see FIG. 3). In FIG. 4, each of the first area of the memory 33 _to 333 _5, 23 minutes as A-time data 40
60 frames per second, 23 minutes 41 seconds 15 frames, 23 minutes 4
1 second 45 frames, 23 minutes 42 seconds 00 frames, 23 minutes 42 seconds 30 frames and thereafter are written (see FIG. 5).

[0074] On the other hand, the read controller 34 which receives the normal write and read instruction, the memory 33 _to 333 ₅
Of, by referring to the contents of the first region time writing has been made, the head of the A-time of the first area of the memory 33 ₅
The previous A-time data is included in the first area of the memory 33 _4, the head A in the first area of the memory 33 ₄
The A-time immediately before the -time data is the memory 33.
₃ is included in the first area, and the previous A-time of the beginning of the A-time data in the first area of the memory 33 ₃ is contained in the first area of the memory 33 _2, memory 33 ₂
A- immediately before the first A-time data in the first area of the
It is checked whether the time is contained in the first area of the memory 33 ₁ and there is no omission in the data read by each reading system.

Reading by the optical pickup 2 is almost I
= 2 revolutions (2 rotated little actually) when performed in advance to the position of IV in FIG. 4, the contents of the first region of the memory 33 _to 333 ₅ is as shown in FIG. 5, in the system for reading since read missing data is eliminated, the read controller 34 provides an interrupt command to the write controllers 31 ₁ to 31 _5, interrupts the writing operation, gives a track jump command to the system controller 50, itself,
In the memory 33 _to 333 _5, this time, with reference to the A-time data and the start address and the end address stored in the first area is written with A-time data, in the memory 321 _to 323 ₅ , This time, for the first area in which the data DATA _{1 to} DATA ₅ are written, the youngest A-time
From the data corresponding to, the data is read in the A-time order and output to the second signal processing circuit 40. Here, 2
3 minutes 40 seconds 60 frames to 23 minutes 42 seconds 59 frames are output. Originally, the A-time of the reproduction start point designated by the host computer is 23 minutes 41 seconds 00 frames, so it is output immediately before the reproduction start point.

The second signal processing circuit 40 receives the data serially output from the parallel / serial conversion section 30,
After descrambling each block,
Lch conforming to the CD-DA standard by performing error detection / correction based on CIRC code (error detection / correction based on P parity, deinterleaving, error detection / correction based on Q parity)
Data and Rch data are demodulated, and synchronization detection, descrambling, header detection, EDC and E are performed from these Lch data and Rch data based on the CD-ROM standard.
CD-RO by error detection / correction by CC code
The M data is demodulated and output to an external host computer.

The write controller 3 which has received the interruption command
1₁~ 31_FiveIs the memory 32₁~ 32 _FiveAnd 33₁~ 33_Five
Suspend writing to. Also track jump
The system controller 50 that received the command is a servo circuit.
Do a track jump in the forward direction for 23
Give a track jump command for the number of tracks J = 7, and
Move pickup 2 from position IV to position V in FIG.
Rack jump, light beam 3₁~ 3_FiveEach tiger
(X + 8), (x + 10), (x + 12), (x +
14), (x + 16) on-track, recording data
Data reading is restarted. And the first signal processing circuit
26₁~ 26_FiveH-level frame sync detection from all
Signal FS₁~ FS_FiveIs output, the track
A pump completion notification is given to the read controller 34.

The read controller 34 that has received the track jump completion notice writes in the write controllers 31 ₁ ...
A restart instruction is given to 31 ₅ and the write controllers 31 _{1 to} 31 ₅ that have received the restart instruction receive the first signal processing circuit 26 ₁
To 26 data DA after the track jump that is output from the ₅
The TA ₁ to Data _5, now write in the second region of the memory 321 _to 323 _5, and, in the second region of the memory 33 ₁ ~33 _5, A-time data AT corresponding to the data DATA ₁ to Data _{5 1 to} AT ₅ and the head addresses a _{1S to} a _5S and the last addresses a _{1e to} a _5e in the memories 32 _{1 to} 32 ₅ are written in pairs (see FIG. 3). In the case of FIG. 4, the memories 33 _{1 to} 3
3 each in the second region of the _5, 2 as A-time data
3 minutes 42 seconds 48 frames, 23 minutes 43 seconds 03 frames,
23 minutes 43 seconds 33 frames, 23 minutes 43 seconds 63 frames, 23 minutes 44 seconds 18 frames and thereafter are written (see FIG. 5).

After the restart command is given, the read controller
The memory 34 is a memory 33.₁~ 33_FiveOf this, write this time
Memory 33 by referring to the contents of the second area
_FiveA immediately before the first A-time data in the second area of
-Time is memory 33_FourIncluded in the second area of
Memory 33_FourOf the first A-time data in the second area of
The previous A-time is the memory 33.₃Included in the second area of
Memory 33 ₃A-tim at the beginning of the second area of
The A-time immediately preceding the e data is the memory 33. ₂Second
Memory 33 included in the area₂At the beginning of the second area of
The A-time immediately before the A-time data is stored in the memory 3
Three₁Is in the second area of the
= 5 light beams 3₁~ 3_FiveThe data read by each system of
Check if the data is not missing.

Reading by the optical pickup 2 is almost I
= 2 rotations (actually 2 rotations or more) have been performed, and VI of FIG.
When you reach the position, the memory 33₁~ 33_FiveWithin the second area of
The contents are as shown in Fig. 5, and are read by each reading system.
Since there is no omission in the data that has been read,
LA 34 is a write controller 31₁~ 31_FiveAgainst
A disconnection command is given, the writing operation is interrupted, and the system controller
Gives the track jump command to the tracker 50, and
Memory 33₁~ 33_FiveOf this time, this time, A-time data
A-time data stored in the written second area of
Data and start address and end address,
Re 32₁~ 32_FiveOf this time data DATA ₁~ DATA_FiveBook of
Second signal processing last time, targeting the second area
A corresponding to one block of data output to the circuit 40
From the data corresponding to the A-time next to -time,
Second signal processing circuit for reading data in the order of A-time
Output to 40. Here, 23 minutes 42 seconds 60 frames
To 23:44:47 frames are output.

The write controller 3 which has received the interruption command
1₁~ 31_FiveIs the memory 32₁~ 32 _FiveAnd 33₁~ 33_Five
To stop writing and receive a track jump command.
The digit system controller 50 uses the optical pickup 2
Track jumper from position VI to position VII in FIG.
Light beam 3₁~ 3_Five, Track (x + 1
7), (x + 19), (x + 21), (x + 23),
On-track to (x + 25) and read recorded data
Picking up is restarted, and the first signal processing circuit 26₁~ 26 _FiveAll of
The H-level frame sync detection signal FS₁~ FS_Five
When the is output, read the track jump completion notification.
It is given to the output controller 34.

The write controller 31 which has received the track jump completion notification via the read controller 34.
_{1 to} 31 ₅ write the data DATA _{1 to} DATA ₅ after the track jump output from the first signal processing circuits 26 _{1 to} 26 ₅ to the first area of the memories 32 _{1 to} 32 ₅ and the memory 33 ₁ to 33 in the first region of the _5, the data dATA ₁
A-time data AT ₁ ~AT ₅ corresponding to the ~DATA ₅
And the start addresses A _{1S to} A _5S in the memories 32 _{1 to} 32 ₅ ,
The last addresses A _{1e to} A _5e are written in pairs. on the other hand,
The read controller 34 stores the memory 32 when the A-time stored in the first areas of the memories 33 _{1 to} 33 ₅ has no omissions and is in a continuous state.
Targeting first region of _{1-32 5,} last, the data corresponding to the next A-time of the A-time corresponding to one block of data output to the last second signal processing circuit 40, A- The data is read and output in the order of time. Thereafter, by repeating the same operation, desired recording data is read from the CD-ROM 1 at high speed in the recording order without duplication or omission. The track (x-
To play from 1) to (x + 17), CD-R
It is sufficient to continuously read about four rotations of the OM1 and perform one track jump, so that data can be reproduced much faster than in the case of FIG.

(3) Special write / read operation-part
1 (light beam 3_FiveWhen the reading by the system of is impossible.
(See FIGS. 6 and 7) The optical pickup 2 moves from the position I in FIG. 6 to the CD-ROM 1
The recording data cannot be read during one rotation relative to
As a result of determining the presence or absence of an effective system, the outermost light beam
Three_FiveIt was impossible to read the recorded data by the system
Of the light beam of the recordable system
Among them, the number M of the group of light beams of the most connected group is
Light beam 3₁~ 3_FourIs a combination of 4 and M ≧
Since it is 2, the system of h light beams for reading
As the M = 4 light beams 3₁~ 3_FourThe system of
Assigned, reproduction continuous reading rotation speed I = (c + 1) = 2,
Number of tracks jumping during playback J =
Set {(c + 1) · (M−1) −1} = 5. That
The first signal processing circuit 26₃The latest At entered from
image data AT ₃A-time data shown by
A-ti at the playback start point specified by the computer
From me and, of the h = 4 light beams for reading, the maximum
Inner light beam 3₁Including A-time of the playback start point
Turn on for track (x-1) on the inner side of one track x
Track jump direction to make a track and jean
Set the number of tracks to jump and make a track jump.

When the system of h light beams for reading is assigned and the continuous reading rotation speed I during reproduction and the number of tracks J for track jump during reproduction are set, the optical pickup 2 moves to the position shown in II of FIG. If it is at the position, the tracks are jumped from the position II by 6 tracks in the forward direction, and the light beams 3 _{1 to} 3 ₄ are respectively moved to the tracks (x-
1), (x + 1), (x + 3), and (x + 5) are on-tracked, and photodetector PD ₁ to first signal processing circuit 26 ₁ and photodetector PD ₂ to first signal processing circuit 2
6 ₂ , photo detector PD ₃ to first signal processing circuit 26
₃ , photodetector PD ₄ to first signal processing circuit 26 ₄
4 systems, tracks (x-1), (x + 1),
Simultaneous reading of the print data of (x + 3) and (x + 5) is started. Then, the first signal processing circuits 26 _{1 to} 26 ₄
When the frame synchronization detection signals FS _{1 to} FS ₄ are input from all of the above, the reading system information “1, 2, 3, 4”
A special writing / reading command including the above is given to the parallel / serial conversion unit 30.

[0085] via the read controller 34 write controller which receives the special write-read command, since only the write controllers 31 ₁ to 31 ₄ of the lines having the reading system information "1, 2, 3, 4" is,
Each memory 32 ₁ data DATA ₁ to Data ₄ output from the first signal processing circuit 26 ₁ to 26 ₄ one block minute
To 32 ₄ in the first area in order, and the memory 33
_To 333 ₄ of the first region, A-time data AT ₁ to AT ₄ corresponding to the data DATA ₁ to Data ₄ and the memory 32 ₁
To 32 the head address A _1S to A _4S in _4, written in pairs end address A _1e to A _4e. In the case of FIG. 6, the memory 3
3 _to 333 each in ₄ of the first region, A-time 23 minutes 40 seconds 60 frames as data, 23 minutes 41 seconds 15 frames, 23 minutes 41 seconds 45 frames, 23 minutes 42 seconds 00
Frames and subsequent frames are written (see FIG. 7).

On the other hand, a special write / read command is received.
The read controller 34
Memory 33 of the system indicated by the information “1, 2, 3, 4”₁~ 3
Three_FourOf the first area that is being written this time
Memory 33_FourA-ti at the beginning of the first area of
The A-time immediately before the me data is the memory 33.₃The first
Memory 33 included in one area₃Of the first area of
A-time immediately before the A-time data of
33₂Included in the first area of the memory 33 ₂First of
A-time immediately preceding the A-time data at the beginning of the area
e is the memory 33 ₁Read in the state of being included in the first area of
There is no omission in the data read by each system for sampling
Check if there was any.

Reading by the optical pickup 2 is almost I
= 2 rotations (actually a little more than 2 rotations) are performed and I of FIG.
At the position of V, the contents of the first area of the memories 33 _{1 to} 33 ₄ become as shown in FIG. 7, and there is no omission in the data read by each read system, so the read controller 34 is the write controller. An interruption command is given to 31 _{1 to} 31 ₄ to interrupt the writing operation, and a track jump command is given to the system controller 50. The memory 33 _{1 to} 33 ₄ itself writes A-time data this time. A-time stored in the first area
Referring to the data and the start address and the end address,
Of the memories 32 _{1 to} 32 ₄ , this time data DATA _{1 to} DATA ₄
Youngest A-tim for the first area where
From the data corresponding to e, the data is read in the A-time order and output to the second signal processing circuit 40. here,
23 minutes 40 seconds 60 frames to 23 minutes 42 seconds 29 frames are output.

The write controller 3 which has received the interruption command
1₁~ 31_FourIs the memory 32₁~ 32 _FourAnd 33₁~ 33_Four
To stop writing and receive a track jump command.
The digit system controller 50 is connected to the servo circuit 23.
Track to jump forward
A track jump command of the number J = 5 is given, and the optical pickup
Track 2 from position IV to position V in Figure 6
Light beam 3₁~ 3_Four, Track (x
+6), (x + 8), (x + 10), (x + 12)
Track and restart reading the recorded data.
It Then, the first signal processing circuit 26₁~ 26_FourAll of
To H level frame sync detection signal FS₁~ FS_FourOut
Reads the track jump completion notification when it is pressed
It is given to the controller 34.

Reading upon receiving the track jump completion notification
The controller 34 is the write controller 31.₁~
31_FourWrite a restart command to the
Controller 31₁~ 31_FourIs the first signal processing circuit 26₁
~ 26_FourData DA after track jump output from
TA₁~ DATA_FourThis time the memory 32₁~ 32_FourSecond area of
And write to memory 33₁~ 33_FourSecond area of
And the data DATA₁~ DATA _FourA-time day corresponding to
AT₁~ AT_FourAnd memory 32₁~ 32_FourTop ad in
Reply a_1S~ A_4S, Last address a_1e~ A_4ePaired with
Write. In the case of FIG. 6, the memory 33₁~ 33_FourSecond territory
Each area has 23 minutes 42 seconds 1 as A-time data.
8 frames, 23 minutes 42 seconds 48 frames, 23 minutes 43 seconds
03 frames, 23 minutes 43 seconds 33 frames and later are written
(See Figure 7).

After giving a restart command, the read controller
The memory 34 is a memory 33.₁~ 33_FourOf this, write this time
Memory 33 by referring to the contents of the second area
_FourA immediately before the first A-time data in the second area of
-Time is memory 33₃Included in the second area of
Memory 33₃Of the first A-time data in the second area of
The previous A-time is the memory 33.₂Included in the second area of
Memory 33 ₂A-tim at the beginning of the second area of
The A-time immediately preceding the e data is the memory 33. ₁Second
It becomes a state included in the area and is read by each reading system.
Check if there is no omission in the issued data.

Reading by the optical pickup 2 is almost I
= 2 rotations (actually a little over 2 rotations) are performed and V of FIG.
When you reach the position of I, the memory 33₁~ 33_FourSecond area of
Contents are as shown in Fig. 7, and each system for reading "1,
There is no omission in the data read in "2, 3, 4"
The read controller 34 is the write controller.
LA 31₁~ 31_FourWrite command
And interrupt the system controller 50
The memory 33.₁~ 33_FourOf
This time, in the second area where A-time data is written,
Stored A-time data, start address and end
Memory 32 by referring to the address₁~ 32 _FourOf this time
Data DATA₁~ DATA_FourTarget the second area written
The last one output to the second signal processing circuit 40 last time.
Next to the A-time corresponding to the data for
Data in the order of A-time from the data corresponding to me
The data is read and output to the second signal processing circuit 40. here
From 23: 42.30 frames to 23: 43.62 frames
Up to Lame is output.

The write controller 3 which has received the interruption command
1 _{1-31 4} interrupts the writing, the system controller 50 having received the track jump command, the optical pickup 2 is a track jump from the position of VI of FIG. 6 to the position of VII, each light beam 3 ₁ to 3 ₄ , Tracks (x + 13), (x + 15), (x + 17), (x + 1
9) on-track to restart the reading of the recorded data, and H from all of the first signal processing circuits 26 _{1 to} 26 _4.
When the level frame synchronization detection signals FS _{1 to} FS ₄ are output, a track jump completion notice is given to the read controller 34. Thereafter, the same operation is repeated to use the _four light beams 3 _{1 to} 3 ₄ for the CD-ROM.
Desired print data from 1 is read out at high speed in the print order without duplication or omission.

[0093] (4) Special Write and read operations - Part 2 (reading by line in the light beam 3 ₄ is impossible.
8, see FIG. 9) results the optical pickup 2 has determined the existence of unreadable systems of recording data while relatively one revolution with respect to CD-ROM 1 from I in FIG. 8, by the system of the light beam 3 ₄ When the recording data cannot be read, the number M of the groups of the group of light beams that are most connected among the light beams of the systems capable of reading the remaining recording data is equal to the number of light beams 3 ₁ to
3 ₃ a 3 a combination of, since it is M ≧ 2, as systems of h-number of the light beam for reading, the M
= 3 light beams 3 _{1 to} 3 ₃ are assigned, the continuous reading rotation number I = (c + 1) = 2 during reproduction, the number of tracks J to be jumped during reproduction J = {(c + 1) ·
(M-1) -1} = 3 is set. Then, the latest A-time data A input from the first signal processing circuit 26 ₃
Play and A-time data indicated by T _3, and a A-time of the specified reproduction start point by the host computer, among h = 3 pieces of the light beam for reading, the innermost light beam 3 ₁ The track jump direction for causing the track (x-1) on the inner peripheral side of the track x including the start point A-time to be on-track and the number of tracks to be jumped are determined and the track jump is performed.

When the system of h light beams for reading is assigned and the continuous reading rotation speed I during reproduction and the number of tracks J for track jump during reproduction are set, the optical pickup 2 moves to the position shown in II of FIG. If it is in the position, the optical pickup 2 is made to jump from the position II by 6 tracks in the forward direction, and the light beams 3 _{1 to} 3 ₃ are respectively turned on to the tracks (x-1), (x + 1), (x + 3). Tracking is performed by three systems of the photodetector PD ₁ to the first signal processing circuit 26 ₁ , the photodetector PD ₂ to the first signal processing circuit 26 ₂ , the photodetector PD ₃ to the first signal processing circuit 26 ₃ , and the track (x-1), (X +
Simultaneous reading of 1) and (x + 3) recorded data is started. Then, when the frame synchronization detection signals FS _{1 to} FS ₁ are input from all of the first signal processing circuits 26 _{1 to} 26 ₁ , the special write / read command including the read system information “1, 2, 3” is executed in parallel / Serial converter 3
Give to 0.

After receiving the special write / read command via the read controller 34, only the write controllers 31 _{1 to 3 13 of the} system indicated by the read system information “1, 2, 3” will be the first signal processing circuit 26 ₁ to 26 outputted from the ₃ the data dATA ₁ to data _3, one block minute memories 32 ₁ ~
32 ₃ of the first region write sequentially, and the memory 33 ₁
The first region of ~33 _3, A-time data AT ₁ to AT ₃ corresponding to the data DATA ₁ to Data ₃ and the memory 32 ₁
Start address A _{1S to} A _3S , end address A at 32 ₃
Write in pairs of _{1e to} A _3e . In the case of FIG. 8, the memory 33
Each in the first region of _to 333, 23 minutes 40 seconds 60 frames as A-time data, 23 minutes 41 seconds 15 frames, is gradually written 23 minutes 41 seconds 45 frames later (see FIG. 9).

On the other hand, the read controller 34, which has received the special write / read command, thereafter, the memories 33 _{1 to} 33 _{3 of the} system indicated by the read system information “1, 2, 3”.
Of, by referring to the contents of the first region time writing has been made, the head of the A-time of the first area of the memory 33 ₃
The previous A-time data is included in the first area of the memory 33 _2, the head A in the first area of the memory 33 ₂
The A-time immediately before the -time data is the memory 33.
_It is checked whether or not there is no omission in the data read by each reading system in the state of being included in the first area of 1.

Reading by the optical pickup 2 is almost I
= 2 rotations (actually a little more than 2 rotations) are performed and I of FIG.
When it reaches the position of V, the contents of the first area of the memories 33 _{1 to} 33 ₃ become as shown in FIG. 9, and there is no omission in the data read by each read system, so that the read controller 34 is An interruption command is given to 31 _{1 to} 31 ₃ to interrupt the writing operation, and a track jump command is given to the system controller 50. The memory 33 _{1 to} 33 ₃ itself writes A-time data this time. A-time stored in the first area
Referring to the data and the start address and the end address,
Of the memories 32 _{1 to} 32 ₃ this time data DATA _{1 to} DATA ₃
Youngest A-tim for the first area where
From the data corresponding to e, the data is read in the A-time order and output to the second signal processing circuit 40. here,
23 minutes 40 seconds 60 frames to 23 minutes 41 seconds 74 frames are output.

The write controller 3 which has received the interruption command
1 _{1 to} 31 ₃ interrupt the writing, and the system controller 50 which receives the track jump command changes the servo circuit 2
3 is given a track jump command of the number of tracks J = 3 for making a track jump in the forward direction, the optical pickup 2 is made to perform a track jump from the position IV to the position V in FIG. 8, and the light beams 3 _{1 to} 3 ₃ are The tracks (x + 4), (x + 6), and (x + 8) are respectively on-tracked, and the reading of the recording data is restarted. And
When the H-level frame synchronization detection signals FS _{1 to} FS ₃ are output from all of the first signal processing circuits 26 _{1 to} 26 ₃ , a track jump completion notification is given to the read controller 34.

Reading upon receipt of track jump completion notification
The controller 34 is the write controller 31.₁~
31₃Write a restart command to the
Controller 31₁~ 31₃Is the first signal processing circuit 26₁
~ 26₃Data DA after track jump output from
TA₁~ DATA₃This time the memory 32₁~ 32₃Second area of
And write to memory 33₁~ 33₃Second area of
And the data DATA₁~ DATA ₃A-time day corresponding to
AT₁~ AT₃And memory 32₁~ 32₃Top ad in
Reply a_1S~ A_3S, Last address a_1e~ A_3ePaired with
Write. In the case of FIG. 8, the memory 33₁~ 33₃Second territory
23 minutes 41 seconds 6 as A-time data in each area
3 frames, 23 minutes 42 seconds 18 frames, 23 minutes 42 seconds
48 frames and later are written (see FIG. 9).

[0100] After giving resuming instruction, the read controller 34 of the memory 33 _to 333, with reference to the contents of the second areas where this write has been made, the memory 33
A immediately before the first A-time data in the second area ₃
-Time is included in the second region of the memory 33 _2,
Is the state the previous A-time of the beginning of the A-time data in the second area of the memory 33 ₂ is contained in the second area of the memory 33 _1, to read in each line for reading data Check if there is no omission.

Reading by the optical pickup 2 is almost I
= 2 rotations (actually a little over 2 rotations) are performed and V of FIG.
When it reaches the position of I, the contents of the second area of the memories 33 _{1 to} 33 ₃ become as shown in FIG.
Since there is no omission in the data read in "2, 3",
The read controller 34 is the write controller 3
An interruption command is given to 1 _{1 to} 31 ₃ to interrupt the writing operation, and a track jump command is given to the system controller 50, and the device itself has written the A-time data in the memories 33 _{1 to} 33 ₃ . Referring to the A-time data and the start address and the end address stored in the second area, among the memories 32 _{1 to} 32 ₃ , targeting the second area in which the data DATA _{1 to} DATA ₃ is written this time,
The A-time next to the A-time corresponding to the data of one block last output to the second signal processing circuit 40 last time
From the data corresponding to, the data is read in the A-time order and output to the second signal processing circuit 40. Here, 2
From 3 minutes 42 seconds 00 frames to 23 minutes 43 seconds 02 frames are output.

The write controller 3 which has received the interruption command
1 _{1-31 3} interrupts the writing, the system controller 34 having received the track jump command, the optical pickup 2 is only the track jump number of tracks J = 3 from the position of VI to a position VII in FIG. 8, the light beam 3 ₁ ~
3 ₃ are respectively tracks (x + 9), (x + 11), (x
+13) to restart on-track reading of recorded data, and by repeating the same operation thereafter, the desired recorded data is duplicated from the CD-ROM ₁ using the _three light beams 3 _{1 to} 3 _3. Also, high-speed reading is performed in the order of recording without any omission.

(5) Special writing / reading operation-part 3 (when reading by the system of light beams 3 ₄ and 3 ₅ is impossible. See FIGS. 10 and 9) The optical pickup 2 makes one rotation from I in FIG. As a result of determining whether or not there is a system in which the recording data cannot be read, when the recording data cannot be read by the systems of the light beams 3 ₄ and 3 ₅ , among the light beams of the system in which the recording data can be read, The number M of the group of light beams of the most connected group is 3, which is a combination of the light beams 3 ₁ to ₃ 3, and M ≧ 2. Therefore, as a system of h light beams for reading, , M = 3 light beams 3 _{1 to} 3 ₃
Of the continuous reading speed I =
(C + 1) = 2, and the number of tracks to be jumped during playback is set to J = {(c + 1) · (M−1) −1} = 3. Then, from the A-time data indicated by the latest A-time data AT ₃ input from the first signal processing circuit 26 ₃ and the A-time at the reproduction start point designated by the host computer, h = 3 for reading. Of the light beams, the light beam 3 ₁ on the innermost side is the reproduction start point A-
One of the tracks x including time, the track (x
The track jump direction for on-tracking in -1) and the number of tracks to be jumped are determined and the track jump is performed.

Then, when the system of h light beams for reading is assigned and the continuous reading rotation number I during reproduction and the number J of tracks for track jump during reproduction are set, the optical pickup 2 of FIG. If you are in position II,
The optical pickup 2 is jumped by 6 tracks in the forward direction, and the light beams 3 _{1 to} 3 ₃ are on-tracked to the tracks (x−1), (x + 1), and (x + 3) respectively, and the photodetectors PD ₁ to 1 Signal processing circuit 26 ₁ , photo detector PD ₂ to first signal processing circuit 2
6 ₂ , photo detector PD ₃ to first signal processing circuit 26
The _third three systems, the track (x-1) ~ (x + 1) is started simultaneously read the recording data. And the first
When the frame synchronization detection signals FS _{1 to} FS ₃ are input from all of the signal processing circuits 26 _{1 to} 26 ₃ , the parallel / serial conversion unit 30 issues a special write / read command including the read system information “1, 2, 3”. Give to. After that,
Exactly the same as in the case of FIG.
After reading the recorded data for the number of revolutions, the track jumped in the forward direction by the number of tracks J = 3, and again after reading the recorded data for about two revolutions,
The operation of jumping by the number of tracks J = 2 in the forward direction is repeated (see III to V in FIG. 10).
(See II), the recording data is read out at high speed in the recording order without duplication or omission.

(6) Special writing / reading operation-No. 4 (when reading by the system of the light beams 3 ₁ and 3 ₅ is impossible. See FIG. 11) The optical pickup 2 moves from the position I in FIG. 11 to the CD-ROM.
As a result of determining whether or not there is a system in which the recorded data cannot be read during one rotation relative to 1, the light beams 3 ₁ , 3 ₅
When it is impossible to read the recorded data by the system of, the light beam of the system that can read the recorded data,
The number M of the most often continuous with a group of light beams of the system is a light beam 3 ₂ to 3 a ₄ a combination of 3, since it is M ≧ 2, as systems of h-number of the light beam for reading , M = 3 light beams 3 _{2 to} 3 ₄ are allotted, and the continuous reading rotation speed I = (c + 1) = 2 during reproduction,
Number of tracks jumping during playback J =
Set {(c + 1) · (M−1) −1} = 3. Then, the latest At input from the first signal processing circuit 26 _{3 is} input.
A-time data indicated by the time data AT ₃ and A-time of the reproduction start point designated by the host computer.
me and a, among the h = 3 pieces of the light beam for reading, one of the peripheral side track of the track x containing the A-time of the light beam 3 ₂ a playback start point of the innermost side (x-1 ) Determine the track jump direction for on-tracking and the number of tracks to jump to.

When a system of light beams for reading h = 3 is assigned and the number of rotations for continuous reading I = 2 during reproduction and the number of tracks J for track jump during reproduction J = 3 are set, When the optical pickup 2 is located at the position II in FIG. 11, the tracks are jumped by 4 tracks in the forward direction, and the light beams 3 _{2 to} 3 ₄ are respectively track (x−1), (x + 1), (x + 3). The on-track to the photodetector PD ₂ to the first signal processing circuit 2
6 ₂ , photo detector PD ₃ to first signal processing circuit 26
₃ , photodetector PD ₄ to first signal processing circuit 26 ₄
Simultaneous reading of the recorded data of tracks (x-1) to (x + 1) is started by the three systems. Then, when the H-level frame synchronization detection signals FS _{2 to} FS ₄ are input from all of the first signal processing circuits 26 _{2 to} 26 ₄ ,
A special write / read command including the read system information “2, 3, 4” is given to the parallel / serial conversion unit 30.

After that, substantially the same as the case of FIG. 8 (see FIG. 1).
In the case of 1, the data DATA _{2 to} DATA ₄ and the A-time data AT ₂ output from the first signal processing circuits 26 _{2 to} 26 _{4 are} output.
The to AT _4, the write controller 31 _{2-31 4} write to memory 32 _{2-32 4} 33 _{2-32 4,} the read controller 34 A-time data and the head address stored in the memory 33 _{2-33 4,} with reference to last address information, the data stored in the memory 33 _{2-33 4} reads duplicate and missing a-time order of such that there is no), the reading of the recorded data of approximately 2 rotations of CD-ROM 1 Then, the operation of jumping in the forward direction by the number of tracks J = 3 and again reading the recorded data for almost two rotations and then jumping in the forward direction by the number of tracks J = 3 is repeated (Fig. 11 III-VII), the recording data is read out at high speed in the recording order without duplication or omission.

[0108] (7) Special Write and read operations - Part 5 (. Light beam 3 _2, 3 if ₅ readings due strains is impossible FIG. 12, see FIG. 13) CD optical pickup 2 from the position of I in FIG. 12 -ROM
As a result of determining whether or not there is a system in which the recording data cannot be read while moving one rotation relative to 1, when the recording data cannot be read by the systems of the light beams 3 ₂ and 3 ₅ , the remaining data cannot be read. The three light beams 3 ₁ , 3 ₃ , 3 ₄ are
Among them, the two light beams 3 ₃ and 3 ₄ are only adjacent to each other in a series. In order to perform high-speed reading by alternately repeating the continuous reading for about two rotations on the CD-ROM 1 and the track jump, it is necessary to read only by the system of light beams adjacent to each other. However, high-speed reading can be performed even in a combination system in which all the light beams used for reading are not adjacent to each other by repeating the continuous reading of three rotations or more for the CD-ROM 1 and the track jump of a predetermined number of tracks. Is possible.

Specifically, in the light beam system capable of reading recorded data, the distance between the innermost and outermost light beams is Q, which is the number of tracks. Among the light beams of the system where the recorded data cannot be read because they are between the outermost light beams, R is the number of the group of light beams that are most connected in series and Q is 2 or more and R is 0 or more. If there is, it is sufficient to repeat continuous {(R + 1). (C + 1)} rotations of the light beam capable of reading the recorded data and (Q-1) track jumps in the forward direction. In the present case, the light beam 3 is on the innermost side of the light beam system capable of reading recorded data.
_{1. Since} the light beam 3 ₄ is on the outermost side, Q = 6, and the number of the group of light beams that are most connected among the light beams of the system in which the recorded data between the light beams 3 ₁ and 3 ₄ cannot be read. Since R is 1 of only the light beam 3 ₂ , all three systems of the light beams 3 ₁ , 3 ₃ and 3 ₄ capable of reading the recorded data are assigned and reproduced as the system of h light beams for reading. Continuous reading rotation speed I = {(R + 1) ・
(C + 1)} = 4, and the number of tracks to be jumped during playback is set to J = (Q-1) = 5.

At the time when the system of h = 3 light beams for reading is assigned and the continuous reading rotation speed I = 2 during reproduction and the number of tracks J for track jump during reproduction J = 5 are set. Then, the optical pickup 2 is shown in FIG.
If it is at the position II, the track is jumped by 6 tracks in the forward direction, and the light beams 3 ₁ , 3 ₃ , 3 ₄
Tracks (x-1), (x + 3), (x + 5)
On-track, and _three tracks of the photodetector PD ₁ to the first signal processing circuit 26 ₁ , the photodetector PD ₃ to the first signal processing circuit 26 ₃ , and the photodetector PD ₄ to the first signal processing circuit 26 ₄ are used to track (x-1 ),
Simultaneous reading of the print data of (x + 3) and (x + 5) is started. Then, the first signal processing circuits 26 ₁ , 2
When the H-level frame synchronization detection signals FS ₁ , FS ₃ , and FS ₄ are input from all 6 ₃ and 26 ₄ , special write / read commands including the reading system information “1, 3, 4” are parallelized. / It is given to the serial conversion unit 30.

Special writing via the read controller 34
Write controller that received a write / read command
Is the system indicated by the reading system information “1, 3, 4”.
Write controller 31₁, 31₃, 31_FourOnly
Respectively, the first signal processing circuit 26₁, 26₃, 26_FourOr
Data output from₁, DATA₃, DATA_Four1 block
Memory 32₁, 32₃, 32_FourOrder to the first area of
And write to memory 33₁, 33₃, 33_FourThe first
Data DATA in 1 area₁, DATA₃, DATA_FourA corresponding to
-Time data AT₁, AT₃, AT_FourAnd memory 32
₁, 32₃, 32 _FourStart address A at_1S, A_3S,
A_4S, Last address A_1e, A_3e, A_4eWritten in pairs
Put in. In the case of FIG. 12, the memory 33₁, 33₃, Memory 3
Three_Four2 in the first area of each as A-time data
3 minutes 40 seconds 60 frames, 23 minutes 41 seconds 45 frames,
The frame after 23:42:00 is written (Fig.
13).

On the other hand, a special write / read command is received.
The read controller 34
Memory 33 of the system indicated by the information “1, 3, 4”₁Three
Three₃, 33_FourOf the 1st area that has been written this time
Memory 33 by referring to the contents of the area _FourAt the beginning of the first area of
The A-time immediately before the A-time data is stored in the memory 3
Three ₃Included in the first area of the memory 33₃First territory of
A-time immediately preceding the A-time data at the beginning of the area
Is the memory 33₁The state included in the first area of
There is no omission in the data read by each acquisition system
Check whether

Reading by the optical pickup 2 is almost I
= 4 rotations (actually a little over 4 rotations) have been performed
When you go to the IV position, the memory 33₁, 33₃, 33_Four
13 shows the contents of the first area of the
There is no omission in the data read by the system, so read
The acquisition controller 34 is the writing controller 3
1 ₁, 31₃, 31_FourGive an interrupt command to and write
Suspend operation and track to system controller 50
Gives a jump command, and the memory 33₁, 33 ₃,
33_FourOf this, A-time data was written this time
The A-time data and the head address stored in the first area
Memory 32 by referring to the address₁, 32
₃, 32_FourThe youngest A-ti in the first area
Data in the order of A-time from the data corresponding to me
The data is read and output to the second signal processing circuit 40. here
From 23: 40.60 frames to 23: 42.59 frames
Up to Lame is output.

The write controller 3 which has received the interruption command
Writing is interrupted by 1 ₁ , 31 ₃ , and 31 ₄ , and the system controller 50 receiving the track jump command causes the servo circuit 23 to have the number of tracks in the forward direction J =
5, the optical pickup 2 is caused to make a track jump from the position IV to the position V in FIG. 12, and the light beams 3 ₁ , 3 ₃ , 3 ₄ are respectively moved to the track (x
+8), (x + 12), (x + 14) are turned on-track, and the reading of the recording data is restarted. Then, when the H-level frame synchronization detection signals FS ₁ , FS ₃ , FS ₄ are output from all of the first signal processing circuits 26 ₁ , 26 ₃ , 26 ₄ , a track jump completion notification is given to the read controller 34. .

[0115] read controller 34 that has received the track jump completion notice writes the controller 31 _1,
31 _3, 31 ₄ to give resuming instruction, ₁ write controller 31 that has received the resuming instruction, 31 _3, 31 ₄ are data after the track jump which is output from the first signal processing circuit 26 _1, 26 _3, 26 ₄ DATA ₁ , DATA ₃ and DATA ₄ are written in the second areas of the memories 32 ₁ , 32 ₃ and 32 ₄ and the data DATA ₁ and DATA ₃ are written in the second areas of the memories 33 ₁ , 33 ₃ and 33 ₄ . , A corresponding to DATA ₄
me data AT ₁ , AT ₃ , AT ₄ and memories 32 ₁ , 3
The head addresses a _1S , a _3S , a _4S and the tail addresses a _1e , a _3e , a _4e at 2 ₃ and 32 ₄ are written in pairs. Figure 1
In the case of 2, 23 minutes 42 seconds 48 frames, 23 minutes 43 seconds 33 frames, and 23 minutes 43 seconds 63 as A-time data in the second areas of the memories 33 ₁ , 33 ₃ , and 33 ₄ , respectively.
Frames and subsequent ones are written (see FIG. 13).

After giving the restart command, the read controller 34 refers to the contents of the second area currently written in the memories 33 ₁ , 33 ₃ , and 33 ₄ and refers to the second area of the memory 33 ₄ . 1 of A-time data at the beginning of
One previous A-time is included in the second area of the memory 33 _3, the head of the A-time of the second area of the memory 33 ₃
It is checked whether the A-time immediately before the data is contained in the second area of the memory 33 ₁ and the data read by each reading system has no omissions.

Reading by the optical pickup 2 is almost I
= 4 rotations (actually a little more than 4 rotations) is performed and when the processing proceeds to the position VI in FIG. 12, the memories 33 ₁ , 33 ₃ , 33 ₄
The contents of the second region becomes as shown in FIG. 13, since the omission is eliminated to the data read by each line "1,3,4" for reading, the write controller 31 ₁ is read controller 34, 31 _3, 31 ₄ gives an interruption command to the disrupts the write operation, the system controller 5
A track jump command is given to 0, and the memory 33
_1, 33 _3, 33 ₄ of the, now, with reference to the A-time data and the start address and the end address stored in the second area that is written with A-time data, the memory 32 _1, 32 _3, Of the 32 ₄ , the second signal processing circuit 40 is selected last time for the second area in which the data has been written this time.
A-tim corresponding to the data for one block output to
From the data corresponding to the A-time next to e,
The data is read in the order of me and output to the second signal processing circuit 40. Here, from 23 minutes 42 seconds 60 frames to 23
Minutes up to 44 seconds and 62 frames are output.

The write controller 3 which has received the interruption command
The system controller 50, which has received the track jump command, interrupts the writing of 1 ₁ , 31 ₃ , 31 ₄ and the system controller 50 jumps from the position VI to the position VII in FIG. 12 by the number of tracks J = 5. by track jump, to resume reading the recorded data, the following, by repeating the same operation, the desired recording data from the CD-ROM 1 by using three light beams 3 _1, 3 _3, 3 _4, overlapping Also, high-speed reading is performed in the order of recording without any omission. For example, the track (x
To read the data for 19 tracks from -1) to (x + 17), it is sufficient to read the data for 8 revolutions of the CD-ROM 1 and to perform one track jump, so that only one light beam is needed for the CD. -Reading can be done much faster than reading data for the time of 19 revolutions of ROM1.

(8) Special writing / reading operation-No. 6 (when reading by the system of the light beams 3 ₁ , 3 ₂ , 3 ₄ is impossible. See FIG. 14) The optical pickup 2 moves from I to CD-ROM 1 in FIG. As a result of determining whether or not there is a system in which the recorded data cannot be read during one rotation relative to the light beams 3 ₁ , 3 ₂ ,
3 when ₄ reads the recorded data due to strains was impossible, but it is impossible to read in two adjacent lines, as in the case of FIG. 12, the system of possible light beam reads the recorded data Of the number of tracks, the distance between the innermost and outermost light beams is Q, and the recorded data exists between the innermost and outermost light beams. Of the light beams of the system that cannot be read, let R be the number of the group of light beams that are most connected in series, and if Q is 2 or more and R is 0 or more, the continuous light beams that can read the recorded data It is sufficient to repeat reading for {(R + 1) · (c + 1)} rotations and (Q-1) number of track jumps in the forward direction.

In this case, in the system of light beams capable of reading recorded data, the light beam 3 _{3 is on} the innermost side and the light beam 3 ₅ is on the outermost side, so Q = 4, and the light beam 3 ₃ . 3 ₅
Of the light beam of the recording system the data becomes unreadable between the number R of the largest number continuous with a group of light beams, since one only light beam 3 _4, as lines of h-number of the light beam for reading , A light beam 3 that can read recorded data
_3, 3 ₅ assigned two all strains of, continuous reading rpm I being reproduced = {(R + 1) · (c + 1)} = 4, the number of tracks to the track jump during playback J = (Q-
1) = 3 is set.

Then, h = 2 light beams for reading
The number of continuous read rotations during playback by assigning the
I = 4 and the number of tracks J jumping during playback
= 3 is set, the optical pickup 2 moves to the position shown in FIG.
If it is in position II, it will be 2 tracks in the forward direction.
KE Track jump, light beam 3₃Three_FiveEach
Track (x-1), (x + 3) on track,
Photo detector PD ₃~ First signal processing circuit 26₃, H
Photodetector PD_Five~ First signal processing circuit 26 _Five2 series
According to the standard, the recording data of tracks (x-1) and (x + 3)
Start simultaneous reading of data. And the first signal processing
Circuit 26₃And 26_FiveH level frame synchronization from all
Detection signal FS₃And FS_FiveWhere is input, read
Special writing / reading including system information “3, 5”
A command is given to the parallel / serial conversion unit 30.

After that, substantially the same as the case of FIG. 12 (see FIG.
In the case of 14, the first signal processing circuit 26 ₃, 26_FiveOutput from
Data DATA₃, DATA_FiveAnd A-time data AT
₃, AT_FiveWrite controller 31₃, 31_FiveBut
Memory 32₃, 32_FiveAnd 33 ₃, 32_FiveWrite to, read
The protrusion controller 34 is the memory 33.₃, 33_FiveStored in
A-time data and start address and end address
Memory 32 with reference to dress information₃, 32_FiveStored in
A-time the stored data without duplication or omission.
(Reading in order), about I = 4 rotations of the CD-ROM 1
After reading the recorded data,
Jumped by the number of racks J = 3, and again almost I = 4 times
After reading the recorded data of the transfer,
The operation of jumping towards the number of tracks J = 3
Repeat (see III to VII in FIG. 14) to record data.
Data at high speed in the recording order without duplication or omission.
Go out. For example, the track (x-1) in FIG.
Data of 16 tracks from (x + 14) to
Read the data of the time of 8 rotations of CD-ROM1
It takes only one picking and one track jump, so one
With the light beam, the CD-ROM 1 takes 16 revolutions worth of time.
Read much faster than reading data
it can.

[0123] (9) Special Write and read operations - Part 7 (when reading by line in the light beam 3 ₄ is impossible.
(Refer to FIG. 15) The optical pickup 2 moves from the position I in FIG. 15 to the CD-ROM.
As a result of determining the presence or absence of unreadable systems of recording data while relatively one revolution for one, when reading the recorded data by the system of the light beam 3 ₄ was impossible, as described in (4) As described above, the light beams 3 _{1 to} 3 ₃ can be read by three adjacent systems (see FIG. 8).
If the same as in the case of FIG. 12, the recording data can be read at a higher speed.

In the present case, of the light beam system capable of reading recorded data, the innermost side is the light beam 3 ₁ , and the outermost side is the light beam 3 _5, so Q = 8, and the light beam 3 ₁ . 3 ₅
Among the light beams of the system in which the recorded data cannot be read during the period, the number R of the group of light beams that are most connected is 1 (light beam 3 ₄ ), so as a system of h light beams for reading, Four lines of light beams 3 _{1 to} 3 ₃ and 3 ₅ are assigned, and the continuous reading rotation speed I = {(R + 1) during reproduction.
Set (c + 1)} = 4, and the number of tracks to be jumped during playback J = (Q-1) = 3.

Then, a system of h = 4 light beams for reading is assigned, and the continuous reading rotation speed I = 4 during reproduction and the number J of tracks for jumping during reproduction.
= 3 is set, if the optical pickup 2 is located at the position II in FIG. 15, the light beam 3 _{1 to} 3 ₃ and 3 ₅ is made to track (x −1), (x + 1), (x + 3),
On-track to (x + 7), photo detector PD
₁ to 1st signal processing circuit 26 ₁ , photodetector PD ₂
~ The first signal processing circuit 26 _2, photodetector PD ₃ -
A track (x−) is provided by four systems of the first signal processing circuit 26 ₃ and the photodetector PD ₅ to the first signal processing circuit 26 _5.
Simultaneous reading of 1), (x + 1), (x + 3), and (x + 7) recording data is started. When the H-level frame synchronization detection signals FS _{1 to} FS ₃ and FS ₅ are input from all the first signal processing circuits 26 _{1 to} 26 ₃ and 26 ₅ , the reading system information “1, 2, 3, The special write / read command including “5” is given to the parallel / serial conversion unit 30.

After that, substantially the same as the case of FIG. 12 (see FIG.
In the case of 15, the first signal processing circuit 26 ₁~ 26₃, 26_Five
Data output from DATA₁~ DATA₃, DATA_FiveAnd At
image data AT₁~ AT₃, AT_FiveWrite
Trawler 31₁~ 31_Five, 31_FiveMemory 32₁~ 32
₃, 32_FiveAnd 33₁~ 33₃, 32_FiveWrite to, read
The output controller 34 is the memory 33.₁~ 33₃, 33_Five
A-time data and start address stored in
The memory 32 is referred to by referring to the tail address information.₁~ 32₃,
32_FiveMake sure that the data stored in
In the order of A-time), and almost all of the CD-ROM 1
After reading the recorded data for I = 4 rotations,
Track jump in the word direction by J = 3 tracks
Then, read the recorded data for approximately I = 4 revolutions again.
By the way, the number of tracks J = 3 in the forward direction
Repeat the track jumping operation (Fig. 1
5 III-VII), duplicate and remove recorded data
High-speed reading is performed in the order of recording without causing any damage.

For example, in reading the data of 23 tracks from the track (x-1) to (x + 21) of FIG. 15, reading of the data for 8 rotations of the CD-ROM 1 and one track jump are performed. It's done. In contrast,
In the case of FIG. 8, it is necessary to read the data of the CD-ROM 1 for eight revolutions and perform three track jumps.

[0128] (10) Special Write and read operations - Part 8 (. Light beams 3 _1, 3 _4, when ₃₅ reading by strains is impossible FIG. 16, see FIG. 17) the optical pickup 2 is I in FIG. 16 CD-ROM from position
As a result of determining whether or not there is a system in which the recorded data cannot be read during one rotation relative to 1, the light beam 3 ₁ ,
When the recorded data cannot be read by the systems 3 ₄ and 3 ₅ , the remaining two adjacent light beams 3 ₂ and 3 ₃
Even by itself, the data can be reproduced by alternately repeating the data reading for two rotations of the CD-ROM 1 and the track jump in the forward direction.

Specifically, in the light beam system capable of reading recorded data, the distance between the innermost and outermost light beams is Q, which is the number of tracks. Among the light beams of the system where the recorded data cannot be read because they are between the outermost light beams, R is the number of the group of light beams that are most connected in series and Q is 2 or more and R is 0 or more. If there is, it is sufficient to repeat continuous {(R + 1). (C + 1)} rotations of the light beam capable of reading the recorded data and (Q-1) track jumps in the forward direction. In the present case, the light beam 3 is on the innermost side of the light beam system capable of reading recorded data.
₂ , since the outermost light beam side is the light beam 3 _3, Q = 2, among the light beams of the system in which the recorded data between the light beams 3 ₂ and 3 ₃ cannot be read, the number of the group of the most connected light beams. Since R is 0, all two systems of the light beams 3 ₂ and 3 ₃ capable of reading recorded data are assigned as the system of h light beams for reading, and the continuous read rotation speed I = {( R + 1) · (c + 1)} = 2, and the number of tracks to be jumped during playback J = (Q−1) = 1.

Then, a system of h = 2 light beams for reading is assigned, and the continuous reading rotation speed I = 2 during reproduction and the number of tracks J = 1 for track jump during reproduction are set. Then, the optical pickup 2 is shown in FIG.
Position II, the tracks are jumped by 4 tracks in the forward direction, the light beams 3 ₂ and 3 ₃ are on-tracked to the tracks (x−1) and (x + 1), respectively, and the photodetector PD ₂ to the first detector. Signal processing circuit 2
6 ₂ , photo detector PD ₃ to first signal processing circuit 26
Simultaneous reading of the recording data of tracks (x-1) and (x + 1) is started by the two systems of ₃ . And the first
When the H-level frame synchronization detection signals FS ₂ and FS ₃ are input from all of the signal processing circuits 26 ₂ and 26 ₃ , a special write / read command including read system information “2, 3” is executed in parallel / serial. It is given to the conversion unit 30.

After receiving the special write / read command from the read controller 34, only the write controllers 31 ₂ and 31 _{3 of the} system indicated by the read system information “2, 3” will be respectively the first write controller. Data DAT output from the signal processing circuits 26 ₂ and 26 ₃
A ₂ and DATA ₃ are sequentially written to the first areas of the memories 32 ₂ and 32 ₃ one block at a time, and the memories 33 ₂ and 33 _{3 are also written.}
Att corresponding to the data DATA ₂ and DATA ₃ in the first area of
start addresses A _2S , A _3S , end addresses A _2e , A _{3e in the image} data AT ₂ , AT ₃ and the memories 32 ₂ , 32 _3.
Write in pairs. In the case of FIG. 16, the memories 33 ₂ , 3
Each of the first areas of 3 ₃ has 2 as A-time data.
3 minutes, 40 seconds, 60 frames, 23 minutes, 41 seconds, and 15 frames and thereafter are written (see FIG. 17).

On the other hand, the read controller 34, which has received the special write / read command, hereafter writes the first one of the memories 33 ₂ and 33 ₃ of the system indicated by the read system information “2, 3” to which writing is currently performed. By referring to the contents of the area, the A-time immediately preceding the first A-time data in the first area of the memory 33 ₃ is included in the first area of the memory 33 _{2, and each} of the areas for reading is read. Check if there is no omission in the data read by the system.

Reading by the optical pickup 2 is almost I
= 2 rotations (actually a little over 2)
When you go to the IV position, the memory 33₂, 33₃First territory of
The contents of the area are as shown in Fig. 17 and can be read by each reading system.
Since there is no omission in the data that has been exposed,
The controller 34 is the write controller 31.₂, 31 ₃
To the system to interrupt the write operation,
Gives a track jump command to the system controller 50,
Memory 33₂, 33₃Of this time, A-tim
A-ti stored in the first area in which e data is written
Refer to the me data and the start and end addresses
Memory 32₂, 32₃Of the first area,
From the data corresponding to the youngest A-time, A-tim
The data is read in the order of e and output to the second signal processing circuit 40.
To do. Here, from 23 minutes 40 seconds 60 frames to 23 minutes
Up to 41 seconds and 44 frames are output.

The writing controller 3 which has received the interruption command
1₂, 31₃Breaks writing and jumps fingers
The system controller 50 that received the order is the servo circuit 2
3 to perform a track jump in the forward direction
Give a track jump command with the number of racks J = 1, and
Install the backup 2 from the position IV to the position V in FIG.
Rack jump, light beam 3₂Three₃Each tiger
Track (x + 2), (x + 4) on track and write
Restart reading of recorded data. Then, the first signal processing
Logic circuit 26₂, 26₃From all of the same H-level frame
Period detection signal FS ₂, FS₃Is output, the
Reads the jump completion notification to the controller 34
It

Read upon receipt of track jump completion notification
The controller 34 is the write controller 31.₂,
31₃Write a restart command to the
Controller 31₂, 31₃Is the first signal processing circuit 2
6₂, 26₃After the track jump output from
Data₂, DATA₃This time the memory 32₂, 32₃Second
Writing to the area and memory 33₂, 33₃Second territory
Area, data DATA₂, DATA ₃A-time data corresponding to
Data AT₂, AT₃And memory 32₂, 32₃At the beginning
Dress a_2S, A_3S, Last address a_2e, A_3ePair
Write. In the case of FIG. 16, the memory 33₂, 33₃The first
Each of the two areas is 23 minutes 41 as A-time data.
32 seconds per second, 23 minutes 41 seconds 62 frames onwards
(See Fig. 17).

After giving the restart command, the read controller 34 refers to the contents of the second area currently written in the memories 33 ₂ and 33 ₃ , and refers to the contents of the memory 33.
A immediately before the first A-time data in the second area ₃
-Time becomes a state included in the second area of the memory 33 _2, and checks whether there are no more missing the read in each line for reading data.

Reading by the optical pickup 2 is almost I
= 2 revolutions (actually a little more than 2 revolutions) have been performed and when the process proceeds to the position of VI in FIG. 16, the contents of the second areas of the memories 33 ₂ and 33 ₃ become as shown in FIG. Since there is no omission in the data read by "2, 3", the reading controller 34 gives an interrupt command to the write controllers 31 ₂ , 31 ₃ to interrupt the write operation, and issues a track jump command to the system controller 50. Given that, of the memories 33 ₂ and 33 ₃ ,
The A-time data stored in the second area in which the A-time data has been written this time is referred to, and the _second address in which the data has been written in the memories 32 ₂ and 32 ₃ is referred to. For the area, the data is read out in the order of A-time from the data corresponding to the A-time next to the A-time corresponding to the data of one block last output to the second signal processing circuit 40, and the second data is read. The signal is output to the signal processing circuit 40. Here, 23 minutes 41 seconds 4
Outputs from 5 frames to 23 minutes 42 seconds 16 frames.

The write controller 3 which has received the interruption command
1 ₂ and 31 ₃ interrupt writing, and the system controller 50 which receives the track jump command causes the optical pickup 2 to make a track jump by the number of tracks J = 1 for track jump from the position VI to the position VII in FIG. And restart reading the recorded data.
By repeating the same operation, the two light beams 3 ₂ , 3
_{Using 3} , the desired recording data is read out from the CD-ROM 1 at high speed in the recording order without duplication or omission.

(11) Special writing / reading operation-Part 9 (when reading by the system of light beams 3 ₁ , 3 ₂ , 3 ₄ , 3 ₅ is impossible. See FIGS. 18 and 19) The optical pickup 2 is shown in FIG. As a result of determining whether or not there is a system in which the recording data cannot be read during one rotation relative to the CD-ROM 1 from I, the light beams 3 ₁ , 3 ₂ ,
When the recorded data cannot be read by the systems of 3 ₄ and 3 ₅ , the remaining one light beam 3 _{3 is} enough
-When attempting to reproduce data by reading data of two or more rotations of the ROM 1 and repeating track jumps in the forward direction, data will be lost. In this case, the data is continuously read from the CD-ROM 1 by one light beam system capable of reading the recorded data. Specifically, as a system of h light beams for reading, a light beam 3 ₃ capable of reading recorded data is used.
Is assigned, and the number of rotations for continuous reading during reproduction I = unlimited,
The number of tracks to be jumped during playback is set to J = 0.

Then, h = 1 light beam for reading
The number of continuous read rotations during playback by assigning the
I = Unlimited and playing track Jumping track
When the number J = 0 is set, the optical pickup 2
If you are in position II of 18, you will get 2 tracks in the forward direction.
Light beam 3₃Track
(X-1) on-track, and photodetector P
D₃~ First signal processing circuit 26₃One system of
Start the reading of the recorded data of KU (x-1). That
The first signal processing circuit 26₃To H level frames
Period detection signal FS ₃When is input, the reading system
Paragraph special writing / reading command including general information “3”
It is given to the real / serial conversion unit 30.

Special document via read controller 34
Write controller that received a write / read command
Is the system description indicated by the reading system information “3”.
Included controller 31₃Only the first signal processing circuit 26
₃Data output from DATA₃For each block
Re 32₃Of the memory 33 in order.
₃Data DATA in the first area of₃A-time corresponding to
Data AT₃And memory 32₃Start address A at_3S, Up
Tail address A_3eWrite in pairs. In the case of FIG.
Memory 33₃A-time data is stored in the first area of
After 23 minutes 40 seconds 60 frames will be written
(See Figure 19). Memory 32₃, 33₃The first area of
If the writing progresses to the later, the maximum of the first area is automatically
Move to the beginning and continue writing.

On the other hand, when the read controller 34 that has received the special write / read command has only one system indicated by the read system information of "3", the read controller 34 stores the memory 33 ₃ of the system indicated by the read system information. , With reference to the contents of the first area that is being written this time, the data is read from the data corresponding to the youngest A-time in the A-time in the memory 32 _{3 in} the order of A-time. It outputs only to the second signal processing circuit 40, and does not output an interruption command or a track jump command. Therefore, not the optical pickup 2 is a track jump during playback (see III~VI in FIG. 18), in accordance with the rotation of the CD-ROM 1, the system of the light beam 3 _3, a track (x-1) after the recording data Are continuously read without any omission and are input to the second signal processing circuit 40.

In the above embodiment, the CD-R
A separate light beam 3 on every cth track of OM1
₁~ 3_nAs an example of simultaneous irradiation with
However, the present invention is not limited to this, and c is
Other combination if it is an integer of 1 or more and n is an integer of 2 or more
However, for example, the optical pickup 2 of FIG.
As shown in B, three light beams 3₁~ 3₃Every other
The track should be illuminated, or the optical
As shown in the backup 2C, the three light beams 3 ₁~ 3₃
May be applied to every two tracks.

In the case of FIG. 20A, if there is no system in which the recorded data cannot be read, the three light beams 3 _{1 to} 3 _{3 are used.}
(C + 1) = 2 for CD-ROM1 in the system
The continuous reading of rotation and the system of the _three light beams 3 _{1 to} 3 ₃ are combined by the reading, and the CD-RO is read.
CD- is performed by alternately performing {(c + 1). (N-1) -1} = 3 track jumps in the forward direction after the read data from M1 is completely removed.
The ROM 1 may be played back. Similarly, FIG.
In the case of 0 (2), if there is no system in which the recorded data cannot be read, the CD in the system of the _three light beams 3 _{1 to} 3 ₃ is used.
-Continuous reading of about (c + 1) = 3 rotations on the ROM1, and by the reading, the three light beams 3
_After combining the _{1 to} 3 ₃ systems, there is no omission in the read data from the CD-ROM 1 {(c + 1) ・
The CD-ROM 1 may be reproduced by alternately performing (n-1) -1} = 5 track jumps in the forward direction.

In the case of FIG. 20 (1), for example, when the recording data cannot be read by the system of the light beam 3 ₃ , the remaining recording data can be read and the largest number of the continuous light beams are recorded. If the number of systems is M, M is the light beam 3
_Since there are _two , ₁ and 3 ₂ , the M = 2 light beams 3
CDs in the systems of M light beams 3 ₁ and 3 ₂ assigned to read the systems ₁ and 3 ₂ for reading
-Continuous reading of about (c + 1) = 2 rotations on the ROM 1 and the CD of the system of M light beams allocated for reading are combined by the continuous reading.
Tracks in the forward direction for {(c + 1). (M-1) -1} = 1 after the read data from the ROM 1 are completely removed are alternately reproduced. Similarly, in the case of FIG. 20 (2), for example, when the recording data cannot be read by the system of the light beam 3 ₃ , the remaining recording data can be read, and the number of the systems of the light beams that are most connected in series. When the the M, M is because the two light beams 3 ₁ and 3 _2, assigned the M = 2 pieces of light beams 3 ₁ and 3 ₂ of the system for reading, M-number of allocated for reading The continuous reading of approximately (c + 1) = 3 rotations of the CD-ROM _{1 in} the system of the respective light beams 3 ₁ and 3 ₂ and the M number of the respective light beams allocated for reading by the continuous reading. Alternately perform {(c + 1) · (M−1) −1} = 2 track jumps in the forward direction after the data read from the CD-ROM 1 has been eliminated by matching the systems. Let it play.

In the explanation of (3) above (see FIGS. 6 and 7).
See), when the data in the system of the light beam 3 ₅ was unreadable, in the light beam of the readable system of recording data, the number M of lines of the largest number continuous with a group of light beams
Is 4 and M ≧ 2, the M = 4 light beams 3 ₁ are set as a system of h light beams for reading.
Assign a ~ 3 ₄ strains, continuous reading rotating speed during playback I = (c + 1) = 2, the number of tracks to the track jump during playback J = {(c + 1) · (M-1) -1} = 5 It was set, but h = 4 allocated for reading
If the distance between the innermost and outermost light beams of the three light beams 3 _{1 to} 3 ₄ is Q in terms of the number of tracks, then Q =
6, and the light beams 3 ₁ to 3 of h systems for reading
_{Of the 4} light beams between the innermost and outermost light beams that cannot read the recorded data, let R be the number of the most grouped light beams. R = 0
Becomes Using these Q and R, the continuous reading rotation speed I = {(R + 1) · (c + 1)} = 2 during reproduction, and the number of tracks jumping during reproduction J = (Q−1) = 5.
It can also be set to.

In the explanation of (4) above (see FIGS. 8 and 9)
See), when the data in the system of the light beam 3 ₄ was unreadable, in the light beam of the readable system of recording data, the number M of lines of the largest number continuous with a group of light beams
Is 3, the system of M light beams 3 _{1 to} 3 ₃ is assigned as the system of h light beams for reading, and the continuous reading rotation speed I = (c + 1) during reproduction.
= 2, the number of tracks J jumping during playback
= {(C + 1) · (M-1) -1} = 3, but among the h = 3 light beams 3 ₁ to ₃ 3 assigned for reading, the light beam is the innermost side. If the distance between the light beams on the outermost peripheral side is Q in terms of the number of tracks, then Q = 4, which is the innermost and outermost side among the h light beams 3 ₁ to ₃ 3 for reading. Letting R be the number of a group of light beams that are most connected among the light beams between the light beams on the circumferential side and from which recording data cannot be read, then R = 0. Using these Q and R, the continuous reading rotational speed I = during reproduction
It is also possible to set {(R + 1) · (c + 1)} = 2 and the number of tracks jumping during reproduction J = (Q−1) = 3.

Similarly, in the cases of the above (5) and ((6)), the light beams 3 ₁ to ₃ 3 of h = 3 systems for reading are also used.
If the distance between the innermost and outermost light beams among (3 _{2 to} 3 ₄ ) is Q in terms of the number of tracks, Q = 4, and h = 3 systems for reading Light beam 3 _{1 to} 3 ₃
Of (3 _{2 to} 3 ₄ ), among the light beams that are between the innermost and outermost light beams and recording data cannot be read, the group of the most grouped light beams If the number is R, then R = 0. Using these Q and R, the continuous reading rotation speed I = {(R + 1) · (c + 1)} = during reproduction.
2. Number of tracks to jump during playback J =
(Q-1) = 3 may be set.

In the explanation of (10) above (see FIG. 16,
(See FIG. 17), when the data cannot be read by the light beams 3 ₁ , 3 ₄ , and 3 ₅ systems, the innermost side of the light beams 3 ₂ and 3 _{3 that} can read the recorded data If the distance between the light beam on the outermost side and the light beam on the outermost side is Q in terms of the number of tracks, then Q = 2, and there is a distance between the light beam on the innermost side and the outermost side of the recording data readable system. Therefore, if the number of a group of light beams that are most connected among the light beams from which the recording data cannot be read is R, then R = 0.
Using these Q and R, the continuous reading rotational speed I = during reproduction
Although {(R + 1) · (c + 1)} = 2 and the number of tracks J to jump the track during reproduction are set to J = (Q-1) = 1, among the light beams of the system capable of reading recorded data, Since the number M of the group of light beams of the most connected group is 2, the system of M = 2 light beams 3 ₂ and 3 _{3 is set as} the system of h light beams for reading. Continuous reading rotation speed I = (c +
1) = 2, and the number of tracks to be jumped during playback J = {(c + 1) · (M−1) −1} = 1 may be set.

Further, in the above-described embodiment, it is determined whether or not there is a system in which the recording data cannot be read at the track position before the reproduction start point designated by the host computer, and based on the result of the determination, the number h of read data is read. The light beam system, the continuous reading rotation speed I during reproduction, and the track number J for track jump during reproduction are set, and then the track position immediately before the reproduction start point designated by the host computer is set. Although the track jump is performed to start the reproduction, unlike this, it is possible to determine whether or not there is a system in which the recorded data cannot be read at the track position including the reproduction start point, or the innermost circumference of the CD-ROM 1. It is also possible to determine whether or not there is a system in which the recorded data cannot be read by the lead-in.

Further, in the cases of (3) to (9) and FIG. 20, the system controller 50 discriminates the system of the light beam from which the recording data cannot be read, and as a result, when there are some systems that cannot be read. After assigning a combination of not only one system to the h light beam systems for reading from the remaining readable systems, the continuous reading rotation speed I during reproduction and the reproduction during the reproduction are performed based on a predetermined rule. Although the number of tracks J for the track jump of is set, the continuous reading on the CD-ROM 1 is omitted to the read data from the optical disc by combining the system of h light beams assigned for reading. The number of rotations for continuous reading when the process is performed until the light disappears is between the innermost and outermost light beams of the h light beams for reading. The number of most frequently continuous with a group of light beams of the light beam becomes unreadable there are recorded data as R, automatically approximately {(R + 1) · (c +
1)}, it is possible to set only the number J of tracks to be jumped during playback. CD
-The continuous reading rotation number when the continuous reading to the ROM1 is performed until all the n light beam systems are combined until the read data from the optical disk is completely eliminated, is also automatically determined to be approximately (c + 1). .

In the above embodiment, the CD-RO is used.
Although M is rotated at a constant linear velocity, it may be rotated at a constant angular velocity (CAV). Also, CD
An optical disc of a type other than a CD-ROM, such as WO, DVD, DVD-ROM, and DVD-RAM, in which tracks are spirally formed may be used.

[0153]

According to the present invention, a separate light beam is simultaneously irradiated to each of the c number of n tracks of an optical disk having spiral tracks, and each return beam is detected separately. From the detection output, the recording data recorded on the optical disc for each system of n light beams is read, and the continuous reading of about (c + 1) rotations on the optical disc by the system of n light beams is performed. , The forward direction of {(c + 1) · (n-1) -1} lines after the read data from the optical disk is completely eliminated by combining the systems of the n light beams by the continuous reading. Since the optical disc is reproduced by alternately performing the track jump to the optical disc, continuous reading of approximately (c + 1) rotations of the optical disc is performed between the track jumps. Since is made, in the case of attempts to read the record data of a certain desired range of the optical disc, fewer number of track jump consuming extra time, data can be read quickly from the optical disk.

Further, even if the recording data cannot be read by some light beam systems due to variations in track pitch of the optical disk, surface wobbling, center wobbling, etc., the remaining light beams can be read. With all or part of the system, required data can be surely read from the optical disc or surely and quickly while preventing omission of read data.

[Brief description of drawings]

FIG. 1 is a block diagram of a CD-ROM reproducing device that embodies an optical disk reproducing method according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a parallel / serial conversion unit in FIG.

FIG. 3 is an explanatory diagram showing an example of stored contents of a memory shown in FIG.

4 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device of FIG. 1. FIG.

5 is an explanatory diagram showing an example of stored contents of a memory in FIG. 2. FIG.

6 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device of FIG. 1. FIG.

FIG. 7 is an explanatory diagram showing an example of stored contents of a memory in FIG.

8 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device of FIG. 1. FIG.

FIG. 9 is an explanatory diagram showing an example of stored contents of a memory in FIG.

10 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device in FIG. 1. FIG.

11 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device in FIG. 1. FIG.

12 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device of FIG. 1. FIG.

13 is an explanatory diagram showing an example of stored contents of a memory shown in FIG.

14 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device of FIG. 1. FIG.

15 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device of FIG. 1. FIG.

16 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device of FIG. 1. FIG.

FIG. 17 is an explanatory diagram showing an example of stored contents of a memory in FIG.

18 is an explanatory diagram showing an example of a data reproducing operation of the CD-ROM reproducing device of FIG. 1. FIG.

FIG. 19 is an explanatory diagram showing an example of stored contents of a memory in FIG.

FIG. 20 is a configuration diagram of an optical pickup according to another embodiment.

FIG. 21 is an explanatory diagram of a multi-beam type optical disc reproducing method.

[Explanation of symbols]

1 CD-ROM 2A, 2B, 2C
Optical pickup 3 _{1 to} 3 ₇ Light beam 4 Laser diode 5 Grating 6 Beam splitter 8 Objective lens 9 Focus actuator 10 Tracking actuator 11 Thread motor 20 Recording data reproducing system 21 ₁ , 21 ₂ , 21 ₃ -A, 21 ₃ -B, 21 ₃ −
C, 21 ₃ -D, 21 ₄ , 21 ₅ Current / voltage converter 22 Arithmetic unit 23 Servo circuit 24 _{1 to} 24 ₅ Waveform equalization circuit 26 _{1 to} 26 ₅
The first signal processing circuit 30 parallel / serial converter 31 _{1-31 5}
Write controller 32 _{1-32 5,} 33 _to 333 ₅ memory 34 read controller 40 second signal processing circuit 50 system controller

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G11B ^7/ 00-7/013 G11B 7/08-7/085

Claims (10)

(57) [Claims] 1. An n-th optical disc with spiral tracks formed every c-th optical disc (where c is an integer greater than or equal to 1 and n is 2).
Each of the above (integer) tracks is simultaneously irradiated with a separate light beam, and each return beam is detected separately. Based on the detection output, the recording data reproducing system recorded on the track irradiated with n light beams. The recorded data is read, and the continuous reading of approximately (c + 1) rotations of the optical disk in the system of n light beams and the system of n light beams are performed by the continuous reading. In addition, the optical disc is reproduced by alternately performing the track jump in the forward direction for {(c + 1) · (n−1) −1} lines after the loss of read data from the optical disc. , Recording from the optical disk in the system of each of n light beams
When a system that cannot read data is created, there is one system of light beam that can read recorded data.
If it is, the recorded data
Continuous due to the system of one light beam in the readable
To read the recorded data and play the optical disc
An optical disk reproducing method characterized by the above . 2. An n-th optical disc with spiral tracks formed every c-th optical disc (where c is an integer of 1 or more and n is 3).
Each of the above (integer) tracks is simultaneously irradiated with a separate light beam, and each return beam is detected separately. Based on the detection output, the recording data reproducing system recorded on the track irradiated with n light beams. The recorded data is read, and the continuous reading of approximately (c + 1) rotations of the optical disk in the system of n light beams and the system of n light beams are performed by the continuous reading. In addition, the optical disc is reproduced by alternately performing {(c + 1) · (n−1) −1} track jumps in the forward direction after the loss of read data from the optical disc, n When a system in which the recording data from the optical disk cannot be read is created in the system of each light beam, the continuous reading rotation speed I and the track jumping track number J are set. If all or part of the system of light beams capable of reading recorded data, and if there is a system of light beams in combination other than only one system, then all or part of the system of light beams capable of reading recorded data. Part is assigned to a reading system, and by the assigned system of each light beam for reading, continuous reading of approximately I rotations (I is an integer of (c + 1) or more) and J
This is changed to I and J in which there is no omission in the read data when the track jumps of this number (J is an integer not less than c and not more than {(c + 1) · (n-1) -1}) are alternately repeated. According to the changed combination of I and J, almost I for the optical disk in the system of each light beam assigned for reading
Tracks in the forward direction corresponding to J lines after the continuous reading of rotation and the system of each light beam allocated for reading are combined by the continuous reading and there is no omission in the read data from the optical disk. An optical disk reproducing method characterized in that an optical disk is reproduced by alternately performing a jump and a jump. 3. An n-th optical disc having spiral tracks formed every c-th optical disc (where c is an integer of 1 or more, and n is 3).
Each of the above (integer) tracks is simultaneously irradiated with a separate light beam, and each return beam is detected separately. Based on the detection output, the recording data reproducing system recorded on the track irradiated with n light beams. The recorded data is read, and the continuous reading of approximately (c + 1) rotations of the optical disk in the system of n light beams and the system of n light beams are performed by the continuous reading. In addition, the optical disc is reproduced by alternately performing {(c + 1) · (n−1) −1} track jumps in the forward direction after the loss of read data from the optical disc, n When a system in which recorded data from an optical disk cannot be read was created in each of the individual light beam systems, the largest number of light beams of the system capable of reading recorded data were linked. The number of lines of the group of light beams as M, M
Is 2 or more, the system of the M light beams is assigned to the system for reading, and the system of the respective M light beams assigned to the reading is approximately (c +
1) Continuous reading for rotation, and by the continuous reading, after the system of M light beams assigned for reading is combined, there is no omission in read data from the optical disk {(c + 1) An optical disk reproducing method characterized in that an optical disk is reproduced by alternately performing (M-1) -1} track jumps in the forward direction. 4. An n-th optical disc having spiral tracks formed every c-th optical disc (where c is an integer of 1 or more and n is 3).
Each of the above (integer) tracks is simultaneously irradiated with a separate light beam, and each return beam is detected separately. Based on the detection output, the recording data reproducing system recorded on the track irradiated with n light beams. The recorded data is read, and the continuous reading of approximately (c + 1) rotations of the optical disk in the system of n light beams and the system of n light beams are performed by the continuous reading. In addition, the optical disc is reproduced by alternately performing {(c + 1) · (n−1) −1} track jumps in the forward direction after the loss of read data from the optical disc, n When a system that cannot read the recorded data from the optical disk is created in the system of each light beam, the innermost side and the most The distance between the light beams on the circumference side is Q in terms of the number of tracks, and one of the light beams of the system between the innermost circumference side and outermost circumference side light beams where the recording data cannot be read When Q is 2 or more and R is 0 or more, where R is the number of a group of light beams that are most frequently connected, almost {(R + 1). ( c + 1)} continuous reading for rotations, and by the continuous reading, the read data from the optical disk is eliminated after combining the systems of the respective light beams capable of reading the recorded data (Q-
1) An optical disc reproducing method, characterized in that the optical disc is reproduced by alternately performing track jumps in the forward direction for the number of lines. 5. An n-th optical disc having spiral tracks formed every c-th optical disc (where c is an integer of 1 or more, and n is 3).
Each of the above (integer) tracks is simultaneously irradiated with a separate light beam, and each return beam is detected separately. Based on the detection output, the recording data reproducing system recorded on the track irradiated with n light beams. The recorded data is read in advance, and the reading from the optical disc is performed by continuously reading the optical disc by the system of n light beams and the system of the n light beams by the continuous reading. {(C + 1) ・ (n-
1) -1} track jumps in the forward direction are alternately performed to reproduce the optical disk, and a system in which the recording data from the optical disk cannot be read is created in the system of each of the n light beams. Then, if there is a whole or a part of the light beam system that can read the recorded data and there is a combination of light beam systems that is not only one system, then the entire system that can read the recorded data Alternatively, a part is assigned to the reading system, and the distance between the innermost side and the outermost side of the optical disk of the assigned light beams for reading is assigned as Q by the number of tracks. Continuous reading on the optical disc with each light beam system,
By the continuous reading, by combining the systems of the respective light beams assigned for reading, (Q-1) track jumps in the forward direction after there is no omission in the read data from the optical disc, The optical disk reproducing method is characterized in that the optical disk is reproduced by alternately performing the above. 6. An optical disk having spiral tracks.
N every c c (where c is an integer greater than or equal to 1 and n is 2)
Simultaneous separate light beams for each track
Optics that irradiate the beam and detect and output each return beam separately.
From the detection output of the optical detection means and the optical detection means
A record that reads the recorded data recorded on the optical disc
The recorded data reproduction means, the optical detection means and the recorded data reproduction means are controlled to
Approximately with respect to the optical disk in the system of the light beam (c +
1) Continuous reading of rotation and the continuous reading
By combining the system of each of the n light beams,
After there is no omission in the read data from
Forward direction for {(c + 1) · (n-1) -1} lines
Alternately perform a track jump to the optical disc
And a reproduction control means for reproducing data from the optical disk in the system of each of the n light beams.
Discriminating means for discriminating whether there is a system in which data cannot be read
And the reproduction control means is arranged so that the reproduction control means cannot read by the discrimination means.
When it is determined that there is a system of
If only one optical beam system is available
At this time, the optical detection means and the recorded data reproduction means are controlled to
Recorded data can be read without rack jump
Data recorded continuously by one light beam system in
Is read and the optical disc is played back.
When optical disk reproducing apparatus according to claim. 7. An n-th optical disc with spiral tracks formed every c-th optical disc (where c is an integer of 1 or more and n is 3).
Each of the above (integer) tracks is irradiated with a separate light beam at the same time, and each return beam is detected separately and output, and n detection beams are output from the optical detection means. The recording data reproducing means for reading the recording data recorded on the optical disc for each system, the optical detecting means and the recording data reproducing means are controlled, and almost (c +
1) The continuous reading of the rotation and the system of the n light beams by the continuous reading are combined, and {(c + 1). (N- 1) −1} track jumps in the forward direction are alternately provided, and reproduction control means for reproducing the optical disc is provided. Further, in the system of each of the n light beams, the optical disc is provided from the optical disc. Discriminating means for discriminating whether or not there is an unreadable system of the recorded data, and when the discriminating means discriminates that there is an unreadable system of the light beam, all or a part of the system of the readable light beam of the recorded data. However, if there is a system using a combination of light beams other than only one system, all or part of the system of light beams that can read the recorded data can be used as a reading system. When the discriminating means discriminates that there is an unreadable optical beam system, the reproducing control means determines the continuous reading rotational speed I during reproduction and the track number J for track jumping. Depending on the system of each reading light beam assigned by the assigning means, continuous reading of approximately I rotations (I is an integer of (c + 1) or more) and J readings (J is c or more, {(c + 1) ) ・ (N-1) -1}
Change to I and J, which does not cause missing in read data when repeating track jumps of (the following integers) alternately,
The optical detecting means and the recording data reproducing means are controlled according to the changed combination of I and J, and continuous reading of approximately I rotations on the optical disk in the system of each reading light beam assigned by the assigning means. , A track jump in the forward direction for J lines after all the read light beams assigned by the assigning means are matched by the continuous reading and the read data from the optical disk is completely eliminated. An optical disk reproducing device characterized in that the optical disks are reproduced alternately. 8. An n-th optical disc having c-shaped tracks formed on a spiral track (where c is an integer of 1 or more, and n is 3).
Each of the above (integer) tracks is irradiated with a separate light beam at the same time, and each return beam is detected separately and output, and n detection beams are output from the optical detection means. The recording data reproducing means for reading the recording data recorded on the optical disc for each system, the optical detecting means and the recording data reproducing means are controlled, and almost (c +
1) The continuous reading of the rotation and the system of the n light beams by the continuous reading are combined, and {(c + 1). (N- 1) −1} track jumps in the forward direction are alternately provided, and reproduction control means for reproducing the optical disc is provided. Further, in the system of each of the n light beams, the optical disc is provided from the optical disc. The discriminating means for discriminating whether or not there is a system in which the recorded data cannot be read, and when the discriminating device discriminates that there is a system in which the light beam cannot be read, among the light beams in the system capable of reading the recorded data, If the number of systems of a group of a large number of light beams connected in series is M, and M is 2 or more, allocation means for allocating the system of the M light beams to a system for reading is provided, and the reproduction control is performed. When the discriminating means discriminates that there is an unreadable optical beam system, if the allocating means allocates M reading optical beam systems, the optical detecting means and the recorded data reproduction during reproduction. Control means,
The continuous reading of approximately (c + 1) rotations on the optical disc in the system of each of the M light beams for reading assigned by the assigning unit, and the M readings assigned by the assigning unit by the continuous reading. After matching the system of each light beam for reading, there is no omission in the read data from the optical disk {(c + 1). (M-
An optical disc reproducing apparatus characterized in that 1) -1} track jumps in the forward direction are alternately performed to reproduce an optical disc. 9. An n-th optical disc with spiral tracks formed every c-th optical disc (where c is an integer of 1 or more, and n is 3).
Each of the above (integer) tracks is irradiated with a separate light beam at the same time, and each return beam is detected separately and output, and n detection beams are output from the optical detection means. The recording data reproducing means for reading the recording data recorded on the optical disc for each system, the optical detecting means and the recording data reproducing means are controlled, and almost (c +
1) The continuous reading of the rotation and the system of the n light beams by the continuous reading are combined, and {(c + 1). (N- 1) −1} track jumps in the forward direction are alternately provided, and reproduction control means for reproducing the optical disc is provided. Further, in the system of each of the n light beams, the optical disc is provided from the optical disc. The discriminating means for discriminating whether or not there is a system in which the recorded data cannot be read, and when the discriminating device discriminates that there is a system in which the light beam cannot be read, among the light beams in the system capable of reading the recorded data, The distance between the inner and outermost light beams is Q, which is the number of tracks, and the recorded data cannot be read because it is between the innermost and outermost light beams. Light beam Among them, the number of most frequently continuous with a group of light beams as R, if Q is R is 0 or 2 or more, I
= {(R + 1) · (c + 1)} for continuous reading,
Setting means for setting J = (Q-1) as the number of tracks to perform a track jump is provided, and when the judging means judges that there is an unreadable optical beam system, the reproducing means uses the setting means. If R and J are set, the optical detection means and the recording data reproducing means are controlled at the time of reproduction, and the continuous reading of approximately I rotations of the optical beam in each system of each readable light beam of the recording data is performed. Then, by the continuous reading, the lines of the respective light beams capable of reading the recorded data are combined, and the data read from the optical disc is completely removed.
An optical disk reproducing device characterized in that an optical disk is reproduced by alternately performing track jumps in the forward direction for the number of lines. 10. A separate light beam is simultaneously applied to each of n (where c is an integer of 1 or more, and n is an integer of 3 or more) tracks of every c optical disks having spirally formed tracks. Optical detection means for irradiating and individually detecting and outputting each return beam, and recorded data reproduction for reading the recording data recorded on the optical disk for each system of n light beams from the detection output of the optical detection means Means, the optical detecting means and the recording data reproducing means are controlled to continuously read the optical disc with the system of each of n light beams, and the system of each of the n light beams is read by the continuous reading. In addition, {(c + 1) · (n−1) − after the data read from the optical disk has no omissions
1} track jumps in the forward direction are alternately provided, and reproduction control means for reproducing the optical disc is provided, and further, recording data from the optical disc is recorded in a system of each of n light beams. Discriminating means for discriminating whether or not there is an unreadable system, and when the discriminating means discriminates that there is an unreadable system for the light beam, it is the whole or a part of the system for the readable light beam of the recorded data. If there is a combination of light beam systems other than only one system, allocation means for allocating all or a part of the light beam system capable of reading the record data to the system for reading, and the reading allocated by the allocation means. The number of tracks is the distance between the innermost and outermost sides of the optical disc of the optical beam for use in the optical disk, and J = (Q-1) is the track jump. Setting means for setting as the number of tracks to be read, the reproduction control means controls and allocates the optical detecting means and the recorded data reproducing means when the judging means judges that there is an unreadable optical beam system. Continuous reading on the optical disk in the system of each light beam for reading assigned by the means, and the continuous reading,
The optical beams for reading assigned by the assigning means are combined to alternately perform J track jumps in the forward direction after the read data from the optical disc is completely removed, and the optical disc is read. An optical disk reproducing apparatus characterized in that the optical disk is reproduced.