KR100955476B1 - Method for setting a sampling delay time in optical device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for setting a sampling delay time in an optical disc apparatus, wherein the constant angular velocity (CAV) recording area and constant linear velocity (as assigned to an optical disc such as CD-R or CD-RW in a partial CAV recording mode) are described. CLV) A plurality of Sampling Delay Time information corresponding to a recording area is classified and stored in a nonvolatile memory in the device at a recording double speed, and one of the plurality of Sampling Delay Time information stored in the current storage unit is currently stored. After the search setting is made with reference to the recording double speed and the recording position, the data recording operation is performed, so that the sampling delay time corresponding to the constant angular velocity (CAV) recording area and the constant linear velocity (CLV) recording area allocated to the optical disc is determined. It is possible to optimally set the recording speed and recording position, and to detect the sampling signal corresponding to the original original signal normally, It is a very useful invention that can prevent the occurrence of an error in the operation or data recording operation.

Optical disc device, partial CAV recording mode CD-R or CD-RW, sampling delay time information, constant angular velocity recording area, constant linear velocity recording area, recording double speed, virtual zone area

Description

Method for setting a sampling delay time in optical device             

1 shows a comparison between a typical original recording signal and a recording pit,

2 illustrates a configuration of an optical disk apparatus to which a sampling delay time setting method according to the present invention is applied.

3 illustrates sampling delay time information stored and managed according to the present invention;

4 is a flowchart illustrating a method of setting a sampling delay time in the optical disk device according to the present invention.

※ Explanation of code for main part of drawing

10: optical disc 11: optical pickup

12: recording processing unit 13: encoder

14: sampling processing unit 15: servo controller

16: memory

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for setting a sampling delay time in an optical disk device. More particularly, the present invention relates to a recording method in which a constant angular velocity (CAV) recording area and a constant linear velocity (CLV) recording area are divided and allocated. The present invention relates to a method for setting a sampling delay time in an optical disk device that records or reproduces data on a CD-R / RW or the like.

Recently, optical discs capable of recording and playing back high quality digital audio data for a long time, for example, optical discs such as CD-R or CD-RW, have been widely commercialized. In the case of the CD-R or CD-RW, In order to further improve the recording efficiency of the CD, the CD in the partial CAV recording mode in which a constant angular velocity (CAV) recording area is allocated on the inner circumferential side of the optical disc and a constant linear velocity (CLV) recording area is allocated on the remaining outer circumferential side of the optical disc. -R or CD-RW are widely used.

On the other hand, when the original signal of the square wave as shown in Fig. 1 is recorded on the CD-R or CD-RW, the recording pit physically formed by the original signal is the original signal. In addition to being recorded as a pit having a shape opposite to the level, a pit of abnormal depth is formed when the original signal is level transitioned.                         

Further, in the optical disc apparatus for recording and reproducing data on the CD-R or CD-RW, the RF signal generated by the recording pit is sampled at a predetermined frequency, and as shown in FIG. In order to exclude the pit portion from the sampling operation, a sampling delay time (Sampling_Delay_Time) previously stored in the device is set.

In the optical disk apparatus, the RF signal from which the pit portion of the abnormal depth is excluded is sampled, and a sampling signal corresponding to the original original signal is normally detected, thereby reducing noise in the servo control operation or data recording operation. Noise).

However, in a typical optical disc apparatus, sampling delay time information for a constant linear velocity (CLV) recording area of an optical disc is stored in the apparatus in advance, and data is recorded not only in the constant linear velocity recording region but also in a constant angular velocity (CAV) recording region. In addition, even in the case of reproduction, since the sampling delay time is applied, a problem arises in that the sampling delay time setting in the constant angular velocity recording area becomes incorrect.

In addition, as the recording density of the optical disk is increased and the recording and reproducing speed of the optical disk device is increased, the sampling delay time must be set more accurately. However, there is no effective solution yet. .

Accordingly, the present invention was created in view of the above problems and circumstances, and provides a sampling delay time corresponding to a constant angular velocity (CAV) recording area and a constant linear velocity (CLV) recording area allocated to an optical disc. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for setting a sampling delay time in an optical disk device so as to be able to optimally set the data recording speed and the recording position.

In order to achieve the above object, a sampling delay time setting method in an optical disc apparatus according to the present invention includes a plurality of sampling delays corresponding to a constant angular velocity (CAV) recording area and a constant linear velocity (CLV) recording area allocated to an optical disc. A first step of storing time information separately according to recording speed; And performing a data recording operation after searching and setting any one of the separately stored plurality of sampling delay time information with reference to the current recording speed and recording position.

Hereinafter, a preferred embodiment of a sampling delay time setting method in an optical disk apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 shows a part of the configuration of an optical disk apparatus to which the sampling delay time setting method according to the present invention is applied. For example, an optical pickup 11 and recording are provided in an optical disk apparatus such as a CD-Recorder. The processor 12, the encoder 13, the sampling processor 14, the servo controller 15, the memory 16, and the like are included.

On the other hand, in the optical disk 10 inserted into the optical disk device, for example, CD-R or CD-RW in the partial CAV recording mode, as shown in FIG. 3, CAV recording on the inner circumferential side of the optical disk. An area is allocated, and the CLV recording area is allocated to the remaining outer peripheral side.

In addition, as shown in FIG. 3, sampling delay time information (Sampling Delay Time_Information) corresponding to each recording speed is recorded and stored in the memory 16. The sampling delay time information includes a CAV recording area and a CLV. The optimal sampling delay time (eg, DT1 to DT4K) corresponding to the recording area and the recording double speed (Write_Speed) is recorded and stored as the experimental result value.

The CAV recording area may be divided into a plurality of virtual zone areas, and sampling delay time information for each recording speed corresponding to the virtual zone areas is stored in the memory as an experimental result value. do.

Meanwhile, in the servo controller 15, when performing a data recording operation according to a user's request, any one of a plurality of sampling delay time information recorded and stored in the memory is referred to by referring to the current recording speed and recording position. After searching and setting one, the data recording operation is performed.

In addition, while performing the data recording operation, a series of operations for continuously checking the current data recording position and variably setting sampling delay time information corresponding to the recording position are performed. same.                     

4 is a flowchart illustrating a method of setting a sampling delay time in the optical disk apparatus according to the present invention. As described above, the optical disk apparatus enters the data recording mode at the request of the user. At this time, the servo controller 15 sets the recording speed selected by the user (S11) and checks the current recording position.

On the other hand, when the checked current recording position is the CAV recording area allocated to the inner circumferential side of the optical disc as described above with reference to Fig. 3, the current virtual zone area subdivided in the CAV recording area (for example, Virtual Zone 1) is detected and recognized (S12).

In addition, with reference to the recognized virtual zone area and the recording speed, the optimum sampling delay time information set corresponding to the virtual zone area is retrieved from the memory 16 and then set as the sampling delay time (S14). .

Then, through a series of processes as described above, after the recording speed desired by the user and the optimum sampling delay time for the recording speed and the recording position are set, the signal is processed by the encoder 13 and the recording processor 12. The original recording signal is recorded in the pit shape on the optical disk (S15).

On the other hand, when the current recording position is changed to another virtual zone area (for example, Virtual Zone 2) while performing the above recording operation (S16), the servo controller 15 in the memory 16, Among the stored sampling delay time information, after setting an optimum sampling delay time for the current recording speed and recording position, the original recording signal signal-processed by the encoder 13 and the recording processing unit 12 is converted into an optical disc. It will be written in pit shape.

On the other hand, when the current recording position is changed from the CAV recording area to the CLV recording area while performing the data recording operation (S17), the servo controller 15 stores a plurality of sampling delay times stored in the memory 16. Among the information, the current recording speed and recording position, that is, the sampling delay time that is optimal for the CLV recording area, is searched and set.

Then, the original recording signal processed by the encoder 13 and the recording processing unit 12 after the optimal recording delay time and the optimal sampling delay time for the CLAV recording area are set through the above-described process, The pit shape is recorded on the optical disk (S19).

As a result, the optimum sampling delay time can be set not only in the constant linear velocity (CLV) recording area but also in the constant angular velocity (CAV) recording area, and the servo signal is normally detected by detecting the sampling signal corresponding to the original original signal. It is possible to prevent an error from occurring in the control operation or the data recording operation.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

 The sampling delay time setting method in the optical disk apparatus according to the present invention constructed and constructed as described above comprises a constant angular velocity (CAV) recording area allocated to an optical disk such as a CD-R or CD-RW in a partial CAV recording mode. A plurality of Sampling Delay Time information corresponding to a predetermined linear velocity (CLV) recording area is stored in a nonvolatile memory in the device for each recording double speed, and any one of the plurality of Sampling Delay Time information stored in the divided By setting and searching one by referring to the current recording speed and recording position, and performing a data recording operation, the sampling delay corresponding to the constant angular velocity (CAV) recording area and the constant linear velocity (CLV) recording area allocated to the optical disk is performed. The time can be set optimally to the data recording speed and recording position, so that the sampling signal corresponding to the original original signal can be normally adjusted. Detected, it would be very useful to be able to prevent inventors that the error of the servo control operation or data write operation occurs.

Claims (4)

A first step of separately storing a plurality of sampling delay time information corresponding to a constant angular velocity (CAV) recording area and a fixed linear velocity (CLV) recording area allocated to the optical disc for each recording double speed; And And performing a data recording operation after setting one of the plurality of pieces of stored sampling delay time information with reference to a current recording speed and a recording position, and then performing a data recording operation. How to set sampling delay time The method of claim 1, Setting the sampling delay time in the optical disc apparatus, wherein the step of continuously checking the current data recording position while performing the data recording operation and variably setting sampling delay time information corresponding to the recording position. Way. The method of claim 1, The sampling delay time information is an experimental result value for compensating for an error between the waveform of the original recording signal and the physical characteristics of the actually recorded pit, and is stored in a nonvolatile memory in the device. How to set the time. The method of claim 3, In the nonvolatile memory, a plurality of sampling delay time information optimized for a constant angular velocity recording area and a constant linear velocity recording area for each recording double speed are stored, and the sampling delay time information of the constant linear velocity recording area is stored in a plurality of virtual zones. The sampling delay time setting method of the optical disk apparatus, characterized in that the storage is divided into a plurality of delay time information corresponding to the areas.

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