KR20010058777A - Method for writing and reading data in an optical disk reader/writer - Google Patents

Abstract

PURPOSE: A data recording and regeneration method of optical recording regenerator is provided to examine into cause of regeneration defect easily by recording a condition of records in a designated region of a disk to record data and referring to the condition of records in case of occurrence of regeneration defect. CONSTITUTION: An optical recording regenerator records and regenerates test data and review whether data recording and regeneration is executed normally if it is input a disk to record a data in the optical recording generator(301). The optical recording regenerator selects laser power suitable to record data in the disk inserted through OPC(optimum power control) executing process for PCA(power calibration area) of the disk(302). A data recording condition of the optical recording regenerator to be set according to the result of OPC execution, that is, laser power setting data to record data and servo series setting data are recorded in a designated region of the disk, that is, PCA(303). A real data to record in the disk is recorded in program region of the disk using laser power if it is set up laser power to record data through OPC execution process(304).

Description

Method for writing and reading data in an optical disk reader / writer}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recorder, and more particularly, to a data recording and reproducing method of an optical recorder. In particular, in recording data on a disk, recording conditions for recording data of the optical recorder in a predetermined area of the disk are described. The present invention relates to a data recording and reproducing method of an optical recording / reproducing apparatus which can facilitate the identification of the cause of the reproducing failure by referring to the recording condition when a reproducing failure occurs in reproducing the data recorded on the disc.

In general, optical recording media have a read only memory (ROM) type, a write once read many (WORM) type, and a rewritable rewritable type, depending on whether repeat recording is possible. It is classified into three types such as possible type.

Here, the ROM type optical recording medium includes a compact disc (CD) ROM and a digital versatile disc (DVD) ROM, and the WORM type optical recording medium is a write once compact disc (CD-R). Recodable Compact Discs and Recordable Digital Versatile Discs (DVD-R).

In addition, freely rewritable discs include a rewritable compact disc (CD-RAM) and a rewritable digital versatile disc (DVD-RAM).

On the other hand, as an example, arrangement of recording areas of a CD-RW disc may include a power calibration area (PCA) 101, a program memory area (PMA) 102, and a lead-in area as shown in FIG. 103, a program area 104, and a lead-out area 105.

Here, the PCA 101 is an area for calibrating laser power for recording data on the disc, and the PMA 102 has head address information of a track in which data is recorded in the program area 104. In addition, in the lead-in area 103 and the lead-out area 105, information on a defective area of a disc on which data is recorded, data recording information stored in the program area 104, and the like are recorded, and in the program area 104. Actual data to be recorded on the disc is recorded.

On the other hand, when data is recorded on the disc, it is necessary to correct the laser recording power due to the difference in the recording sensitivity of the disc film, the temperature, the recording sensitivity caused by the laser wavelength variation, and so on. It is called OPC (Optimum Power Control). In addition, as shown in FIG. 1, the OPC performs test recording while varying the laser power for recording data in the PCA 101 of the disc inner circumference. Then, the optical recorder reads out the data recorded in the PCA 101 and sets the optimum recording power.

However, in the case where the conventional optical recorder records data after performing the OPC process, the laser output by performing the OPC is outside the normal output range due to a defect in the driving of the optical recorder that records the data. When there is an error in the servo state, data is not recorded normally when recording data on the disk. As a result, normal reproduction cannot be performed in reproducing the data recorded on the disc.

On the other hand, even in the case of such a CD-RW disc, even in a general recordable disc, when the recorded data cannot be reproduced normally, the recording conditions are not known at the time of data recording by the optical recorder that recorded the data. There is a problem that is difficult to identify the cause of the defect.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and in recording data on a disc, recording conditions at the time of data recording by the optical recorder are recorded in a predetermined area of the disc to reproduce data recorded on the disc. It is an object of the present invention to provide a data recording and reproducing method of an optical recording / reproducing apparatus that can easily identify the cause of the reproduction defect by referring to the recording condition when a reproduction failure occurs.

1 conceptually shows the arrangement of recording areas of a CD-RW disc;

2 is a schematic configuration diagram of a general optical recording and reproducing system.

3 is a flowchart showing an execution process of a data recording method of the optical recorder according to the present invention.

4 is a flowchart showing an execution process of a data reproducing method of the optical recorder according to the present invention.

<Explanation of symbols for the main parts of the drawings>

101 ... PCA 102 ... PMA

103 ... Lead-in area 104 ... Program area

105 ... Lead-out area 201 ... Disc

202 ... Data processor 203 ... ECC memory section

204 Servo system 205 Microcomputer

206 ... host

In order to achieve the above object, the data recording method of the optical recorder according to the present invention,

(a) performing data recording on the inserted disc;

(b) recording the data recording conditions of the optical recorder for performing recording in a predetermined area of the disc.

The data recording condition of the optical recorder is characterized in that the laser power setting data for recording data and the setting data of the servo system are included.

Further, in order to achieve the above object, the data reproduction method of the optical recorder according to the present invention,

(a) reproducing the data recorded on the inserted disc;

(b) acquiring recording conditions of an optical recorder at the time of data recording, recorded in a predetermined area of the inserted disc, if data reproduction is not normally performed in the data reproduction process; And

and (c) determining whether there is a defect in data recording performed by the optical recorder at the time of data recording by referring to the obtained recording condition, and performing an action accordingly.

According to the present invention as described above, in recording data on the disc, the recording condition at the time of recording the data of the optical recorder is recorded in a predetermined area of the disc on which the data is recorded, and the reproduction failure in reproducing the data recorded on the disc is reduced. In the case of occurrence, there is an advantage that it is easy to identify the cause of the reproduction failure by referring to the recording condition.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic configuration diagram of a general optical recording and reproducing system.

Referring to FIG. 2, a general optical recording and reproducing system includes a disk 201, a data processor 202 for processing data read from the disk 201 and data to be recorded on the disk 201, and the data processor. An ECC memory unit 203 in which data in unit of ECC (Error Correction Code) in which 202 reads / writes data is stored, a servo system 204 for controlling driving of the disk 201, and the data processor A microcomputer (hereinafter referred to as a micom) 205 that controls 202 and a host 206 that requests data from the micom 204.

Next, the data recording and reproducing method of the optical recording and reproducing apparatus according to the present invention will be described with respect to the optical recording and reproducing system having the above configuration.

3 is a flowchart showing an execution process of a data recording method of the optical recorder according to the present invention.

Referring to Fig. 3, first, when a disc 201 to record data is inserted into the optical recorder (step 301), the optical recorder enters the PCA 101 (see Fig. 1) of the inserted disc 201. The test data is recorded while varying the laser power for recording the data, and the recorded data is reproduced to examine whether the recording and reproduction of the data are normally performed.

Here, when the test data is recorded in the PCA 101 of the disc 201 when performing OPC on the inserted disc 201, laser power setting data for recording test data recording conditions of the optical recorder, for example, data. And the setting data of the servo system may be used as the test data.

As such, through the OPC process of the disc 201 of the PCA 101, the optical recorder selects a laser power suitable for recording data on the inserted disc 201 (step 302). Then, the data recording conditions of the optical recorder set in accordance with the result of the OPC in step 302, for example, laser power setting data for recording data, setting data of the servo system, and the like are stored in a predetermined area of the disk 201, for example, PCA. Write to 101 (step 303).

Accordingly, as described above, when the laser power to record data is set through the OPC process, the actual data to be recorded on the disc 201 is programmed using the set laser power. Write to the area (step 304).

4 is a flowchart illustrating an execution process of a data reproducing method of the optical recorder according to the present invention.

Referring to Fig. 4, first, a disc 201 for reproducing data is inserted into the optical recorder. Accordingly, the optical recording / reproducing unit reproduces the data recorded in the program area of the inserted disc 201 (step 401). At this time, depending on the circumstances of the disc 201, reproduction of data recorded on the disc 201 may be normally performed, but reproduction of data recorded on the disc 201 may not be normally performed (step 402). Here, when normal data reproduction is not performed in reproducing the data recorded on the disc 201, there may be a problem in the data reproduction process, or a problem in the process of recording data on the disc 201. It may have been.

On the other hand, if the reproduction of the data recorded on the disk 201 is not normally performed, the data at the time of recording the data on the disk 201, which is recorded in a specific area of the disk 201, for example, the PCA 101, is recorded. Data recording conditions are obtained (step 403). Here, from the obtained data recording condition, it is determined whether or not there is a defect in data recording performed by the optical recording / reproducing player which recorded data on the disc 201, and an action is performed accordingly (step 404).

For example, as a result of referring to the above recording conditions, when the data recording laser power set by performing the OPC is out of the average value, or when the setting data of the servo system is not within the average value range, the data is recorded at the time of data recording. Since it is not possible to record normally to 201, when playing back the data recorded by the optical recorder under conditions outside such an average value, even if the inserted disc 201 itself has no defect, the recorded data can be played back normally. It will not be possible. Therefore, in such a case, the optical recorder recording data on the disk 201 is collected, and measures such as repair of a defective portion are performed.

As described above, in the data recording and reproducing method of the optical recorder according to the present invention, in recording data on the disc, recording conditions at the time of recording the data of the optical recorder are recorded in a predetermined area of the disc on which the data is recorded. In the case where a playback failure occurs in reproducing data recorded on the disc, the recording condition is referred to, whereby the cause of the playback failure can be easily identified.

Claims (3)

(a) performing data recording on the inserted disc; and (b) recording data recording conditions of the optical recorder for performing recording in a predetermined area of the disc. The method of claim 1, The data recording condition of the optical recorder includes laser power setting data for recording data and setting data of a servo system. (a) reproducing the data recorded on the inserted disc; (b) acquiring recording conditions of an optical recorder at the time of data recording, recorded in a predetermined area of the inserted disc, if data reproduction is not normally performed in the data reproduction process; And and (c) determining whether the optical recording player has a defect in performing the data recording upon data recording, and performing an action according to the obtained recording condition. How to play data.