JPH02139769A - Data recording method for optical disk - Google Patents

Abstract

PURPOSE:To surely detect the end of a recordable range by monitoring a tracking servo signal at the time of transferring a read-in data to a read-in area and detecting a marker signal component. CONSTITUTION:In regard to the transfer recording from a store area to a memory 22 by a 1st transfer recording means, the read-in data recorded in the store area is compounded even in case of a large amt. of signal redundancy by a reproducing circuit 10 to be a read-in data with a small amt. of signal redundancy and then to be recorded in the memory 22. Moreover, a motor stopping signal is outputted to a motor driving circuit 23 by a control circuit 21 under a recording mode of a 2nd transfer recording based on a detecting signal to be inputted via a 2nd signal line l2 from a marker detecting circuit 27, and the recording to a compact disk (CD) 1 is stopped as well. Thus, during the transfer recording time, a tracking error is simultaneously monitored, and when a marker signal is detected, it is decided that the read-in area is ended, and hence the end of the recordable area can accurately be detected out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a data recording method for an optical disc.

[Background Art] In recent years, optical disks (optical disc-shaped recording media) have attracted attention as a medium that can record high-density and large-capacity information. In order to randomly access and play desired recorded data from among the large amount of recorded data recorded on such optical discs on different manufacturers' players, the recorded data and the corresponding lead-in data ( Address data) must be recorded in a compatible format. For example, in a playback-only compact disc (hereinafter simply abbreviated as CD) among optical digital audio discs, recorded data A, B, C, and D such as music data and recorded data A are recorded.

Create lead-in data such as time information and frame numbers for B, C, and D, record it on a storage medium (for example, magnetic tape) of another recording device, and then use this data during compatible formatting. Lead-in data a and b read from a storage medium of another recording device.

c, d and recorded data A, B, C, D are led to the original recording device, where, as shown in FIG. 5, the spiral tracks (2) formed on the CD (1) are Recording was performed in a lead-in area (3) at the innermost circumference and a recording area (4) continuous to the terminal end (3e) of this lead-in area (3).

[Problems to be Solved by the Invention] However, in the conventional data recording method as described above, data is recorded on a storage medium of another recording device and then read from the storage medium of this other recording device during compatible formatting. Lead-in data atbtc, d and recording data A
, B, C, and D to the original recording device to create a CD (1)
Since recording was performed in the upper predetermined areas (3) and (4), there was a problem in that a separate recording device was required in addition to the original recording device.

The present invention was made in view of the above-mentioned problems.

It is an object of the present invention to provide a data recording method for an optical disc that can easily and reliably perform compatible formatting without using a separate recording device.

[Means for Solving the Problems] The method for recording data on an optical disc according to the present invention records either the spiral track formed on the optical disc from the inner periphery to the outer periphery or from the outer periphery to the inner periphery. A lead-in area, a marker area, a recording area, and a store area are provided along one side, and during manufacturing, a marker signal that can be distinguished from the original tracking error signal during tracking servo is applied to the tracking guides on both sides of the track in the marker area. forming a marker for obtaining the recording data, and recording recording data and lead-in data corresponding to the recording data in the recording area and the storage area at the time of recording,
During compatible formatting, first transfer and record the lead-in data in the store area to the memory, then monitor the 1-racking error signal while transferring and recording the lead-in data in this memory to the lead-in area;
The present invention is characterized in that transfer recording to the lead-in area is stopped based on the detection of the marker signal in the tracking error signal.

[Operation] During the manufacture of an optical disk, markers are formed on the tracking guides on both sides of the track in the marker area to obtain a marker signal that can be distinguished from the original tracking error signal during tracking servo. When the record button is pressed to input recorded data (for example, music data) from the input circuit, a marker signal based on the marker of the tracking guide in the marker area is first detected in the playback mode, and when this marker signal disappears, the recording area is Since there is, the recording mode is entered, and the recording data and corresponding do-in data are recorded in the recording area and the store area. When a compatible format signal is input from the input circuit, first the lead-in data in the store area is transferred to and recorded in the memory, and then the lead-in data in this memory is transferred and recorded in the lead-in area. During this transfer recording, the tracking error signal is simultaneously monitored, and if a marker or - signal is detected in the tracking error signal, it is determined that the lead-in area has ended, and the transfer recording to the lead-in area is stopped. In this manner, the end of the recordable area for lead-in data can be accurately detected by detecting the marker signal.

[Embodiment] FIGS. 1 to 4 show an embodiment of the data recording method according to the present invention.

FIG. 1 shows a block diagram of an apparatus for implementing the data recording method according to the present invention. In this figure, (10) is for inputting recorded data such as audio signals and signals for compatible formats from a microphone or line. This is the input circuit. The output side of this input circuit (10) is A
- It is connected to a CD format encoder (12) via a D conversion circuit (11). The CD format encoder (12) is a circuit that adds lead-in data such as time data, frame number data, error correction data, etc. corresponding to recording data, and the data output from this CD format encoder (12) is recording data. An optical head (1) for recording and playback is connected to the line (17).
8) is connected to the recording input side. The reproduction output side of the optical head (18) is connected to an audio signal output terminal (20) via a reproduction circuit (19), and is also coupled to a control circuit (21). The control circuit (21) includes a memory (22) for recording lead-in data.
is provided. (1) is a CD (compact disc) of optical digital audio discs as an example of an optical disc, and this CD (1) is driven by a motor (24) driven by an instant signal from a motor drive circuit (23).
) is controlled to a predetermined rotation speed. (25) controls the movement of the optical head (18) in the radial direction of the CD (1), and controls the movement of the optical head (18) to the CD (1).
This is a servo mechanism that controls the focus, tracking, etc. of the laser beam (26) irradiated to D (1). (27)
is a marker detection circuit for detecting a marker signal (for example, 40KI(z)) from among the tracking error signals sent from the optical head (18) to the servo mechanism (25).The control circuit (21) is The CPU (central processing unit) is the main body, and the CD format encoder (12) and the playback circuit (19).

It is configured to control a motor drive circuit (23) and a servo mechanism (25). The control circuit (21) further connects the input circuit (10) to an A-D conversion circuit (
11) and the first signal line (Q□).
The lead-in data recorded in the store area (29) of 1) is read out, and this lead-in data is transmitted to the playback circuit (
The memory (22) in the control circuit (21) via the
), and after the transfer recording is completed, the servo mechanism (25) is controlled to emit a laser beam (
26) inward from the vicinity of the start end (4s) of the recording area (4) by the approximate distance R required for the lead-in area (for example, 2 to 3 mm) to create the start end (3s) of the lead-in area (3). a servo control means for positioning the CD (1); a rotation control means for forwardly rotating the CD (1) after this positioning; and a rotation control means for forwardly rotating the CD (1); 3) is provided with second transfer recording means for transferring and recording from the start end (3S) to the end end (3e).

Note that the Zutoa area (29
) to the memory (22), even if the lead-in data recorded in the store area (29) has a lot of signal redundancy, it is combined by the reproducing circuit (19) and the read-in data has a low signal redundancy. After being made into data, it is recorded in the memory (22). Furthermore, in the recording mode during the second transfer recording, the control circuit (21) controls the motor drive circuit (
23) and outputs a motor stop signal to the CD
(1) is configured to stop recording.

Next, the operation of FIG. 1 will be explained with reference to FIGS. 2, 3, and 4.

(b) First, when manufacturing CD (1), as shown in FIGS. 2 and 3, track (2) of CD (1)
) is formed from the inner periphery to the outer periphery of the dot-in area (3), marker area (30), and recording area (4).
and the marker area (30) of the store area (29).
) tracking guides (6) on both sides of the track (2)
(7) A marker (33) is formed. This marker (33) has a predetermined period Tm=17fm (for example, fm=
It consists of a cut part (31) cut at a frequency of 40 KHz and a non-cut part (32). The marker area (30)
The track length is assumed to be T for a certain period (for example, 0.1 seconds).

(b) Next, in recording data to CD (1),
Assume that on the first day, the record button is pressed to record Beethoven's music data A as the recording data of the first song. Then, first, the servo mechanism (25) and the motor l! are activated by the control signal from the control circuit (21). ilK dynamic circuit (2
3) is controlled and the laser beam (26) of the optical head (18) is controlled.
) comes to the area inside the marker area (30) (for example, the lead-in area), and the CD (1) rotates forward,
Enters playback mode. After a marker signal is detected in the tracking error signal by the marker detection circuit (27) in the tracking servo in this reproduction mode, when the detection signal disappears, the recording area becomes a recording area where nothing has been recorded yet, so the recording mode is entered. .

(c) In this recording mode, the music data A input from the input circuit (10) and the lead-in data a corresponding to the music data A added by the CD format encoder (12) are connected to the recording data line (17). is sent to the recording input side of the optical head (18) through the laser beam (26) and irradiated from this optical head (18).
As shown in Figure 2, the spiral track (
Data is recorded in the recording area (4) of 2) and the store area (29) provided at the outermost circumference of the track (2) from the inner circumference side to the outer circumference side of the track (2).

(d) Next, the second and third. On the 4th day, the 2nd
, 3rd. If music data B, C, and D of the fourth song are additionally recorded, these music data B.

C, D and the corresponding lead-in data b, c, d are
In substantially the same manner as in (b) and (c) above, additional recording is performed in the recording area (4) and store area (29), respectively, as shown in FIG. At this point, the lead-in area (3)
nothing is recorded.

(e) Once the recording of music data A, B, C, D and the corresponding lead-in data a g be't d on CD (1) is complete, this CD (1) can be played on any manufacturer's player. Compatible formatting is performed to make it . That is, by pressing the formatting button of the input circuit (10), the first
When a compatible format signal is input via the signal line (12t), the first transfer recording means of the control circuit (21) first transfers the data to the storage area (29) of the CD (1).
The lead-in data a, b, c, and d recorded in are reproduced by an optical head (18), and transferred and recorded in a memory (22) via a reproduction circuit (19).

(f) Next, the servomechanism control means of the control circuit (21) directs the laser beam (26) of the optical head (18) inward from the vicinity of the starting end (4s) of the recording area (4) by an approximate distance (for example, 2. 5mm) and move it to the lead-in area (3mm).
) position the starting end (3S).

(g) Then, by the rotation control means of the control circuit (21),
D (1) is rotated in the forward direction, and during this forward rotation, the control circuit (
21), the lead-in data in the memory (22) is transferred to the starting end (3s) of the lead-in area (3).
) is transferred and recorded toward the end portion (3e).

(H) During this transfer recording (recording mode), when the laser beam (26) passes the end portion (3e) of the lead-in area (3) and reaches the marker area (30), a tracking error signal is generated during tracking servo. is the original tracking error signal (0 to 5Kl(z)) superimposed with a marker signal (for example, 40Kl(z). In other words, when there is no original tracking error as shown in Fig. 4(a)) But tracking guide (6) (7
) If the tracking error signal swings to the + side when the spot (Ll) hits the notch (31) of one (6) of the tracking guides (6) and (7), the other (7) of the tracking guides (6) and (7)
) when the spot (L2) hits the notch (31), the tracking error signal swings to one side.

Therefore, if the original tracking error signal Se has a period TS (=1/fS, for example fs=5KIIz) as shown by the dotted line in FIG. 4(b), then the optical head (1
The tracking error signal S sent from 8) to the servo mechanism (25) is as shown by the solid line in FIG.
period Tm (=1/fm, for example fm=40Ktlz
) is a superimposed signal. For this reason, H
, P, F, (bypass filter) or B, P, F, (
Marker calibration circuit (2 bandpass filter) etc.
7), the marker signal with period Tm is separated and detected. Therefore, it becomes easy and reliable to detect whether a marker signal is present in the tracking error signal.

(When the detection signal detected by the marker detection circuit (27) is input to the control circuit (21), the control circuit (21) determines that the lead-in area (3) has ended, and the motor drive circuit (23) ) outputs a stop signal to stop the rotation of CD (1), and ends recording on CD (1).

In the embodiment described above, the markers formed on the tracking guides on both sides of the track in the marker area of the CD are formed by cut portions and non-cut portions with a constant period Tl11, so that the markers are formed with a constant period Tl11 in the tracking error signal during tracking servo. Although the marker signal of Tm is obtained, the present invention is not limited to this, and any marker signal that can be distinguished from the original tracking error signal during tracking servo may be obtained. For example, it may be a marker that can obtain a marker signal with a sweep waveform that changes in one cycle.

In the above embodiment, in the case of a compatible format in which the innermost circumference of a CD track is used as a lead-in area, the innermost circumference and the outermost circumference are respectively made into a do-in area and a store area. In the case of a compatible format in which the area is the lead-in area, the innermost and outermost areas may be used as the store area and the lead-in area, respectively.

In the embodiment described above, a plurality of pieces of recorded data (music data) are recorded on a CD in multiple batches over several days and then are formatted in a compatible format. However, the present invention is not limited to this; This also applies when recording data on a CD multiple times during the day and then formatting it in a compatible format, or recording only one piece of recorded data (for example, music data for one song) and then formatting it in a compatible format. Available.

In the above embodiment, a method for recording predetermined data on a CD in an optical digital audio disc has been described, but the present invention is not limited to this, and also describes a method for recording predetermined data on an optical video disc. can be used.

[Effects of the Invention] As described above, in the data recording method for a write-once optical disc according to the present invention, when recording data, lead-in data corresponding to the recorded data is first recorded in the store area, and a predetermined amount of lead-in data is recorded in the store area. The lead-in data recorded in the store area is transferred to and recorded in the original lead-in area when the recording data is finished and a compatible format is performed, eliminating the need for a separate recording device that was previously required. , compatible formatting of optical discs becomes easy and reliable. Moreover, during manufacturing, markers are formed on the tracking guides on both sides of the track in the marker area provided between the lead-in area and the recording area to obtain a marker signal that can be distinguished from the original tracking error signal during tracking servo. The tracking servo signal is monitored when lead-in data is transferred to the lead-in area, and when a marker signal component is detected in this tracking error signal, the rotation of the optical disc is stopped and recording is completed. The end of the recordable range can be reliably detected, and unnecessary signals are not recorded in the recording area.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the method for recording data on an optical disc according to the present invention. FIG. 1 is a block diagram of an apparatus for carrying out the method of the present invention, and FIG. compact disc (CD)
3 is a sectional view taken along line P-P in FIG. 2, FIG. 4 is a waveform diagram showing the tracking error signal for the markers of the tracking guides on both sides of the track in the marker area, and FIG. 5 is a conventional playback diagram. Dedicated compact disc (CD
) is a plan view showing a compatible format state. (1)...Compact disc (CD) (optical disc), (2)...Track, (3)...Lead-in area, (4)...Recording area, (6) (7)...・Tracking guide, (1o)...Input circuit, (12)・
...CD format encoder, (17)...recording data line, (18)...optical head, (19)...
... Regeneration circuit, (21) ... Control circuit, (22) ...
·memory. (26)... Laser light, (27)... Marker detection circuit, (29)... Store area, (30)... Marker area, (33)... Marker applicant Fujitsu General Ltd. Figure Figure

Claims (1)

[Claims] A lead-in area, a marker area, a recording area, and a store area are provided along either from the inner circumference to the outer circumference or from the outer circumference to the inner circumference of the spiral track formed on the optical disc. At the time, markers are formed on the tracking guides on both sides of the track in the marker area to obtain a marker signal that can be distinguished from the original tracking error signal during tracking servo, and during recording, markers are formed on the tracking guides on both sides of the track in the marker area. Recording data and lead-in data corresponding to this recording data are recorded, and during compatible formatting, the lead-in data in the store area is first transferred to and recorded in the memory, and then the lead-in data in this memory is transferred to the lead-in area. A method for recording data on an optical disc, characterized in that a tracking error signal is monitored while transferring and recording to the lead-in area, and the transfer and recording to the lead-in area is stopped based on the detection of the marker signal in the tracking error signal. .