JPH06131668A - Optical disk method and system for recording it - Google Patents

Abstract

PURPOSE:To prevent the degradation in the image quality of a video signal by using a disk in which a guide track formed with no track number is formed and simultaneously recording the track number together with a video information signal. CONSTITUTION:A DRAW type recording film is used for an optical disk. Then, the guide track recorded with no track number previously is formed in a guide track formation area 3 on the disk. The recording of video information on the unrecorded optical disk is executted so that a frequency-modulated recording signal after the track number is added to video information along or on the guide track formed previously in the area 3 is recorded by irradiating with a recording layser beam. By the result of the recording, the video information is recorded in the area 5 recorded with the video information and the track number is recorded in the area 6 recorded with the track number. Thus, the overlapping of the video information signal and the track number is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk system capable of optically recording and reproducing information, and more particularly, an optical disk effective for recording image information and the like, a recording method and a recording method therefor. Regarding the system.

[0002]

2. Description of the Related Art Generally, an optical disk device capable of optically recording / reproducing information records information by irradiating laser light and physically changing the surface of the optical disk irradiated with the laser light. Then, the information is reproduced by optically detecting the changed portion.

As an example of this kind of optical disk device, for example, a thin film in a crystalline state on the surface of an optical disk which is a recording medium is irradiated with laser light to change it to an amorphous state, and a difference in reflectance between laser light in the crystalline state and the amorphous state. It is known to use a phase-change recording method for detecting the magnetic field, a magneto-optical recording method for changing the direction of magnetization of the magnetic thin film, and detecting the Kerr effect when the laser beam is applied to the magnetic-optical recording method.

In order to record information at a high density, an optical disk device having such a recording principle is usually provided with an optically detectable guide track on the disk and uses this guide track for tracking. Control is performed and signals are recorded along this guide track.

As a conventional technique using such a guide track, for example, Japanese Patent Laid-Open No. 58-102347,
Techniques described in JP-A-59-177744 and the like are known.

In the above-mentioned prior art, the guide truck is
Information unique to each track, for example, a track number, is inserted, whereby a guide track at an arbitrary address is searched and the information is recorded on the track, or information of a predetermined track that is recorded in advance. It is possible to play.

[0007]

SUMMARY OF THE INVENTION In the above-mentioned prior art, track specific information (hereinafter,
Since the track number) is usually formed on the disk substrate with uneven pits, when the video information signal is recorded, the uneven pits interfere with the video information signal and deteriorate the image quality. I have a problem.

Further, in the write-once type CD (CD-WO), in order to eliminate these disturbances, the guide track is slightly vibrated (wobbled) to correspond to the AT corresponding to the track number.
An IP (Absolute Time In Pre-groove) signal is formed on the disk substrate. However, this prior art has a problem that when the guide track is wobbled, the distance from the adjacent track changes, and when the video information signal is recorded, the image quality is deteriorated due to crosstalk.

An object of the present invention is to solve the above-mentioned problems of the prior art, prevent duplication of the video information signal and the track number, and prevent the image quality of the video signal from deteriorating. To provide a system.

[0010]

According to the present invention, the above-mentioned object is to use a disc on which a guide track having no track number is formed and to record the track number at the same time as the recording of the video information signal. It is achieved by

Further, for the above-mentioned purpose, an area other than an area for recording a video information signal is used, for example, a disk having track numbers formed of concave and convex pits on the inner and outer circumferences of the disk is used, and the track numbers are referred to. This is achieved by controlling the recording position of the video information signal.

[0012]

[Operation] In the area for recording the video information signal of the disc,
Since the track number composed of the uneven pits is not recorded, it is possible to eliminate the interference of the uneven pits with the video information signal, and it is possible to record the video signal without deterioration. Further, since the track number is recorded at the same time as the recording of the video information signal, it is possible to easily retrieve the information thereafter.

Further, by forming a track number composed of uneven pits in an area other than the area for recording the video information signal, for example, in the inner and outer circumferences of the disc, the pits interfere with the video information signal. Can be lost,
Moreover, since the recording start position or the recording end position of the disc can be grasped, the recording position of the video information signal can be accurately controlled for recording. Further, since there is no wobbled guide track, it is possible to prevent crosstalk between tracks.

[0014]

Embodiments of an optical disc, a recording method therefor and a recording system according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan view illustrating an optical disc according to the first embodiment of the present invention. In FIG. 1, 1 is the inner diameter of the disc, 2 is the outer diameter of the disc, 3 is an area in which a guide track is formed, 4 is an unrecorded area, 5 is an area in which video information is recorded, and 6 is an area in which a track number is recorded.

The optical disk according to the first embodiment of the present invention shown in FIG. 1 is, for example, an Sb-Se film and a Bi film as recording films.
A write-once recording film using a two-layer structure of a film is used. In the guide track formation area 3 of the disc, guide tracks in which track numbers are not recorded are formed in advance.

Recording of video information on an unrecorded optical disc as described above is performed along a guide track previously formed in the guide track forming area 3 or on the guide track.
The recording is performed by irradiating a recording laser beam with a recording signal that is FM-modulated after adding a track number to the video information.

As a result of this recording, as shown in FIG. 1, the video information is recorded in the area 5 in which the video information is recorded, and the track number is recorded in the area 6 in which the track number is recorded.

As described above, in the optical disc shown in FIG. 1, the track number and the video information signal are simultaneously recorded in the area 3 in which the guide track is formed, so that an optical disc containing good video information can be obtained. .

In the area 6 in which the track numbers are recorded, the lead-in signal is recorded in the inner peripheral portion and the lead-out signal is recorded in the outer peripheral portion, and the continuous track numbers are recorded in the program area between them. To be done.

2 and 3 are plan views illustrating an optical disc according to a second embodiment of the present invention. FIG. 2 shows a state before recording and FIG. 3 shows a state after recording. 4 is an enlarged view of the track number area, and FIG. 5 is a flow chart for explaining the recording method. 2 to 4, 7
Is an area in which a guide track is formed, 8 and 9 are areas in which track numbers are formed of concavo-convex pits, 10 is an area in which track numbers are recorded, and 11 is an area in which video information is recorded.

In the optical disk according to the second embodiment of the present invention shown in FIG. 2, the guide track is formed in advance in the area 7 in which the guide track is formed, and the outer periphery other than the area for recording information such as a video information signal. In the track number area 9 and the inner circumference track number area 8, the track numbers of the outer circumference and the inner circumference by the concave and convex pits are formed in advance when the disk substrate is manufactured. Therefore, the position of the disc can be detected by reading this track number.

By recording a video information signal or the like on an optical disc on which such a video signal is not recorded, the optical disc shown in FIG.
As shown in FIG. 5, an area 10 in which a track number is recorded and an area 11 in which video information is recorded are formed. Also in this case, since the track number and the video information signal are recorded on the guide track, the track number and the video information are associated with each other.

The track number area portion 8 of this optical disk,
In FIG. 4 in which 9 and 10 are enlarged, an area 10 in which a track number is recorded is an area 1 in which a lead-in signal is recorded.
2. Program area 1 that records consecutive track numbers
3 and the area 14 in which the lead-out signal is recorded.

Next, an example of a method for recording information such as a video signal on the optical disc shown in FIG. 2 will be described with reference to the flow shown in FIG.

(1) First, the inner track number of the inner track number area 8 is detected, and recording is started from the position of a predetermined track number at which recording should be started (step 2).
1, 22).

(2) Next, a lead-in signal is recorded, and after recording the lead-in signal on a predetermined track, program recording is performed. In the program recording, the video information signal with consecutive track numbers is recorded (step 23,
24).

(3) After recording the predetermined video information, the lead-out signal is recorded, and when the outer track number of the outer track number area 9 is detected, the recording is immediately ended.
When the lead-in signal and the lead-out signal are recorded, the dummy video information is recorded at the same time. This is because the video information in this area is not reproduced by the reproduction player (steps 25 to 27).

According to such a recording method, since the recording start position and the recording end position can be determined by the track numbers already formed on the optical disc, the recording position is accurately controlled to record information. be able to.

When the reproducing player of the recorded optical disc shown in FIG. 3 which has been recorded by the above-mentioned recording method is reproduced, the video information recorded in the track of the program area is detected after the above-mentioned lead-in signal is detected. This is performed by reproducing, detecting the lead-out signal, and immediately stopping the reproducing operation.

The optical disc according to the second embodiment of the present invention described above does not have track numbers composed of concave and convex pits in the area where reproducible video information is recorded. There is no
It is possible to reproduce good video information. In addition, it is desirable that the areas for recording the lead-in signal and the lead-out signal do not have uneven pits, but even if there are uneven pits in part of the lead-in signal and lead-out signal areas, the video information is reproduced. It is not a big obstacle in doing it.

FIG. 6 is a plan view for explaining an optical disk according to the third embodiment of the present invention, and the reference numerals in the drawing are the same as those in FIG.

In the optical disc according to the third embodiment of the present invention shown in FIG. 6, the recording track number portion 10 to be recorded together with the video information is replaced with the track number portions 8 and 9 previously recorded by the concave and convex pits. This is to prevent the track numbers from overlapping, and to completely prevent the obstacles to the lead-in signal and the lead-out signal.

FIG. 7 is a block diagram showing an embodiment of the recording system according to the present invention. In FIG. 7, 31 is an optical disk, 32 is a spindle motor, 33 is a motor servo circuit, 34 is a focus and tracking control circuit, 3
5 is an optical head, 36 is a high frequency signal preamplifier, 37 is a track number demodulation circuit, 38 is a recording drive controller, 39 is a laser drive circuit, 40 is a slider motor, 4
1 is a slider motor servo circuit, 50 is a video image reproducing device, 51 is a track address code generating device, and 52 is an FM.
The modulator 53 is a recording system controller.

The recording system shown in FIG. 7 is suitable for realizing the above-described recording method according to the present invention.
This system will be described below for recording video information on an unrecorded optical disc as shown in FIG.

The unrecorded optical disk 31 is rotated by the spindle motor 32 via the motor servo circuit 33, and the optical disk focus and tracking control circuit 3
4, the laser beam 42 from the optical head 35 is accurately emitted along the guide track of the optical disc 31. A known push-pull method is used for this tracking control.

Then, the high-frequency signal preamplifier 36 and the track address demodulation circuit 37 detect the track address signals of the pits of unevenness provided on the optical disk 31. The recording drive controller 38 determines the recording position on the optical disc 31 based on the detected track address signal.

This determination can be performed, for example, by using the address signals of addresses 10000 and below in the inner track number area 8 and the address signals of addresses 20000-30000 in the outer track number area 9. .
That is, it becomes possible to distinguish between the inner and outer circumferences by the detected address signal, and the position of the guide track area 7 for recording the track number and the video signal on the optical disc is determined by not detecting the address signal. be able to.

The recording drive controller 38 controls recording while moving the optical head by the slider motor 41 via the slider motor servo circuit 41.

At the time of recording video information, for example, a digital V
An image information signal is supplied from a video image reproducing device 50 such as a TR, and a track address code generated by a track address code generating device 51 is added to this image information signal. The FM modulator 52 FM-modulates the video information signal to which the track address code is added and sends it to the recording drive controller 38 as a recording signal. Controller 3
8 modulates the laser light by the laser drive circuit 39 based on this recording signal, and performs recording on the optical disc 31.

The recording system controller 53 controls the video image reproducing device 50, the track address code generating device 51 and the recording drive controller 38.
That is, when the recording drive controller 38 determines the inner circumferential recording position of the optical disc 31, the recording system controller 53 causes the video image reproducing device 50 to supply a video information signal, and the track address code generating device 5
1 to generate a lead-in signal.

The recording system controller 53 records the predetermined lead-in area, and then the video image reproducing apparatus 50.
The information code is recorded in the program area while the track address code generator 51 is controlled by the time code signal received from the controller to generate the track number. At the end of the program, the track address code generator 51 is controlled by the time code signal. Control is performed to generate a lead-out signal, and the lead-in signal is recorded.

Finally, the recording system controller 53
When the recording drive controller 38 determines the outer peripheral recording position of the optical disc 31, the recording operation is terminated and the recorded optical disc is completed.

Although the system according to the embodiment of the present invention described above does not refer to the rotation speed of the optical disk 31, the present invention also applies to a CAV (constant rotation speed) mode disk, and also to the CLV (line speed). It can also be applied to a disk in a constant speed) mode. Furthermore, the present invention can be applied to both a write-once optical disc and a rewritable optical disc.

[0045]

As described above, according to the present invention, since the uneven pits or the track numbers by the ATIP signal are not recorded in the video information recording area, it is possible to eliminate the interference with the video information signal. A reproduced video can be obtained, and the recording position of the disc can be accurately controlled by recording a track number composed of concave and convex pits other than the video information recording area.

[Brief description of drawings]

FIG. 1 is a plan view illustrating an optical disc according to a first embodiment of the present invention.

FIG. 2 is a plan view illustrating a state before recording on an optical disc according to a second embodiment of the present invention.

FIG. 3 is a plan view illustrating a state after recording on the optical disc according to the second embodiment of the present invention.

FIG. 4 is an enlarged view showing a track number area.

FIG. 5 is a flowchart illustrating a recording method.

FIG. 6 is a plan view illustrating an optical disc according to a third embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a recording system according to an embodiment of the present invention.

[Explanation of symbols]

 3, 7 Guide track area 4 Unrecorded area 5, 11 Video information recorded area 6, 10 Track number recorded area 8 Inner circumference track number area 9 Outer circumference track number area 12 Lead-in area 13 Program area 14 Lead-out area 31 Optical disk 32 spindle motor 33 motor servo circuit 34 focus and tracking control circuit 35 optical head 36 high frequency signal preamplifier 37 track number demodulation circuit 38 recording drive controller 39 laser drive circuit 40 slider motor 41 slider motor servo circuit 50 video image playback device 51 track address code Generator 52 FM modulator 53 Recording system controller

Front page continuation (72) Hitoshi Yanagihara, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Inside Hitachi Media Media Research Laboratories, Inc. (72) Inventor Yoshihiko Noro, 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa

Claims (6)

[Claims] 1. An optical disk capable of recording / reproducing information signals, wherein the optical disk is preliminarily formed with a guide track on which track specific information is not formed, and a track is provided along the guide track or on the guide track. An optical disc on which the unique information and the video information signal are recorded. 2. An optical disk capable of recording / reproducing information signals, wherein the optical disk has a track specific with no track-specific information and track pits formed on the inner and outer tracks of the guide track. Information is preformed, and track specific information and a video information signal are recorded along the guide track or on the guide track. 3. The pre-formed track specific information and the track specific information formed along or on the guide track are formed at different positions in the circumferential direction of the disk. 3. The method according to claim 2,
The described optical disc. 4. An optical disc capable of recording and reproducing information signals, wherein the optical disc is provided with track specific information consisting of concave and convex pits on inner and outer tracks, and guides between the inner and outer tracks. The optical disc is characterized in that the track is not provided with track-specific information based on uneven pits. 5. A method for recording an optical disc capable of recording and reproducing information signals, wherein the optical disc has track specific information formed by concave and convex pits on its inner and outer tracks, and the inner and outer tracks are An optical disc having a guide track which does not have track specific information by irregular pits is used, and the recording position of the video information signal is controlled by referring to the specific information provided on the inner and outer tracks. Optical disc recording method. 6. A recording system using an optical disc capable of recording and reproducing information signals, wherein the optical disc comprises:
Using an optical disk having inner and outer tracks having track specific information due to uneven pits, and a guide track having no track unique information due to uneven pits between the inner and outer tracks, In order to perform recording on the optical disc, a demodulation circuit for detecting unique information provided on the inner and outer tracks and a controller section for controlling the recording position of the information signal based on the detection signal are provided. Optical disc recording system.