KR100696839B1 - Recording method of optical record player - Google Patents

Abstract

The present invention relates to a recording method of an optical recorder, and when the insertion of the optical disk is recognized, performing an optimal power control (OPC) process of selecting an appropriate recording power by a writing strategy or a predetermined writing strategy based on the information of the optical disk. Setting the start recording power through the recording, recording the data to be recorded in the data area of the optical disk using the set recording starting power while monitoring the tilt change of the optical disk, and when the tilt of the optical disk being monitored Resetting the write strategy by detecting the timing factor indicating the minimum jitter after performing test recording while changing the timing factor of the write strategy in the preset write strategy compensation interval while recording is paused. Resume recording of the data area of the optical disc accordingly. It includes a step, and if the tilt of the optical disk enters the setting range while performing the recording with the initial set write strategy, by resetting the write strategy, there is an advantage to increase the recording success rate by maximizing the stability of the recording.

Description

Recording method of optical record player {RECORDING METHOD FOR OPTICAL RECORDER}

1 is a block diagram of a general optical recorder;

2 is a flowchart showing a recording process of an optical recorder according to the prior art;

3A and 3B are state diagrams for explaining the change in recording performance according to the tilt change of the optical disc in the optical recorder;

4 is a flowchart showing a recording process of the optical recorder according to the present invention;

The present invention relates to a recording method of an optical recorder, and more particularly, to a method of resetting and recording a write strategy according to a tilt change of an optical disc for recording stability.

In general, an optical disc is a recording-only optical disc such as a CD-ROM (CD-Read Only Memory), a DVD-ROM, etc., and a write once such as a CD-WORM (CD-WORM), depending on whether recording is possible. Possible optical discs and CD-RW (CD-Rewritable), DVD-RAM (DVD-Random Access Memory), and the like can be classified as an optical disc capable of repeatable recording.

On the other hand, the recording area arrangement of the recordable optical discs includes a power calibration area (PCA), a program memory area (PMA), a lead-in area, a program area, and a lead-out area. Separated by. Here, the PCA is an area for calibrating the laser recording power for recording data on the optical disc, and the PMA has the head address information of the track on which the data is recorded in the program area. Further, data recording information and the like stored in the program area are recorded in the lead-in area and the lead-out area, and actual data to be recorded on the optical disc is recorded in the program area.

The optical recording and reproducing apparatus for recording and reproducing information on the optical disc drives the laser diode to record information on the optical disc by irradiating a light beam of relatively large energy that can change the physical characteristics of the information recording layer existing on the optical disc. The information is reproduced from the optical disc using a light beam of small energy that does not change the physical characteristics of the information recording layer.

As shown in FIG. 1, the optical recorder includes a recording pulse generator 13 for generating an actual recording pulse by including auxiliary information from the controller 15 in recording information transmitted from a host (not shown). And a laser diode driver 14 for driving a laser diode included in the optical pickup unit 12 according to the recording pulse generated by the recording pulse generator 13 and the laser power level set by the controller 15, and the optical disc 11. Amplified by the optical pickup unit 12 for detecting the optical signal reflected from the optical signal, the RF signal amplifier 17 for amplifying the RF signal detected by the optical pickup unit 12, and the RF signal amplifier 17 And a signal processor 18 for reproducing the RF signal.

In the figure, reference numeral 16, which is not described, is a memory, in which control procedures for recording and reproducing the optical disc 11 are stored in a program form, and the stored program is called and executed by the controller 15.

The recording process of the optical recorder configured as described above will be described with reference to FIG. 2. First, the controller 15, which recognizes the type of the inserted optical disc 11 (S21), sets a write strategy to improve recording performance (S23). In step S25, an optimal power control process (OPC) for selecting a recording power suitable for the optical disc 11 is performed.

Referring to the OPC process, the optical pickup unit drives a laser diode provided in the optical pickup unit 12 to record test data in the PCA of the optical disc 11 and then reproduces a reproduction signal (that is, an RF signal) proportional to the amount of reflected light. It detects in (12). The controller 15 calculates a beta value that minimizes the jitter amount by using a variable (beta value) corresponding to the vertical symmetry of the reproduction signal waveform transmitted through the signal processor 18 and is proportional to the beta value. Select the recording power.

Then, the optimum recording start power is set from the recording power selected in the OPC process in consideration of the current recording speed. Here, the recording start power has a proportional increase characteristic as the speed increases. Next, the data to be recorded is recorded in the data area of the optical disc 11, that is, the program area, at the recording start power set in accordance with the file structure (S27).

On the other hand, the recording performance of the optical disc changes according to the tilt change of the optical disc, and the recording performance deteriorates when the tilt component increases near the outer periphery of the optical disc.

3A and 3B are diagrams for explaining a change in recording performance according to a tilt change of an optical disc in an optical recorder, in which case the mark length due to the optical pickup is increased as shown in FIG. It becomes longer, or the length of the mark by optical pickup is shortened as shown in Fig. 3B, and the recording performance is deteriorated. Therefore, the arrangement of the optical pickup is maintained to be perpendicular to the optical disk. To do this, set the minimum value (min_tilt) and maximum value (max_tilt) of the tilt, and record the arrangement of the optical pickup when the tilt of the optical disc is included in the range from the preset minimum value to the maximum value (min_tilt ≤ current_tilt ≤ max_tilt). Ensure performance is maintained

However, according to the related art, when the initial writing strategy is set, recording is performed by using a write strategy based on the information of the optical disc or a write strategy preset by the manufacturer of the optical recorder. Regardless of changing the writing strategy, only the initially set value was used, and thus there was a problem that the limit of securing the record was reached.

The present invention has been proposed to solve such a conventional problem, and when the tilt of the optical disc falls within the setting range while performing the recording with the initial writing strategy, the writing strategy is reset to maximize the stability of the recording to increase the recording success rate. Its purpose is to.

The recording method of the optical recorder according to the present invention for realizing such an object is characterized in that the OPC process of selecting an appropriate recording power by a writing strategy or a predetermined writing strategy based on the information of the optical disk when the insertion of the optical disk is recognized. Setting a recording start power by performing the step; recording data to be recorded using the set recording start power while monitoring the tilt change of the optical disc, in the data area of the optical disc; and tilting the optical disc being monitored. When is in the setting range, while recording is paused, performing a test recording while changing the timing factor of the write strategy in the preset write strategy compensation section, resetting the write strategy by detecting a timing factor indicating the minimum jitter; Based on the reset write strategy, And a step of resuming the recording of the data area of the disc.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

4 is a flowchart illustrating a recording process of the optical recorder according to the present invention.

As described above, in the recording process of the present invention, when the insertion of the optical disc is recognized, the recording start power is set by performing an OPC process for selecting an appropriate recording power by a write strategy or a preset write strategy based on the information of the optical disc. Steps S101 to S105, recording the data to be recorded in the data area of the optical disc in accordance with the file structure using the recording start power set while monitoring the tilt change of the optical disc; Resetting the write strategy by detecting the timing factor indicating the minimum jitter after performing test recording while changing the timing factor of the write strategy in the preset write strategy compensation section when the tilt is within the setting range. The data of the optical disc based on (S111-S113) and the reset write strategy. Resuming the recording of the area is configured to include a step (S115) to complete the record.

The recording process of the optical recorder according to the present invention configured as described above will be described in more detail. Meanwhile, the recording process according to the present invention may be performed through the optical recorder of FIG. 1, and the recording and reproduction procedure according to the present invention may be provided in the form of a program.

First, when the insertion of the optical disc is recognized (S101), the writing strategy is set based on the information of the optical disc (S103) or the OPC process of selecting an appropriate recording power using a writing strategy preset to the manufacturer of the optical recorder ( Through S105), the recording start power is set.

Then, by monitoring the tilt change of the optical disc (S107), the data to be recorded is recorded in the data area of the optical disc in accordance with the file structure using the set recording start power (S109).

Here, recording is paused when the tilt of the optical disc being monitored falls within the setting range while recording data on the optical disc. The tilt setting range is a range in which the stability of recording can be impaired because the tilt component is large. In this embodiment, the recording performance is not satisfied even if the tilt of the optical pickup is changed. As described in the description of the prior art, when the tilt of the optical disc is included in a predetermined range from the minimum value to the maximum value (min_tilt ≤ current_tilt ≤ max_tilt), the recording performance is maintained by changing the arrangement of the optical pickup. Set the 10% margins (min_tilt ≤ current_tilt ≤ min_tilt × 90% and max_tilt × 90% ≤ current_tilt ≤ max_tilt) at, respectively, to pause recording in anticipation that the recording performance will not be satisfied when the tilt component of the optical disc falls within the set margin. (S111). Of course, the setting range of the tilt to pause recording can be adjusted by changing the margin as much as possible, but setting within 10% is advantageous in terms of recording performance.

Then, after performing test recording while changing the timing factor of the write strategy in the preset write strategy compensation interval, the timing factor indicating the minimum jitter is detected and the write strategy is reset (S113). The timing factor selects a preset number of initial recording pulses to increase / decrease the pulse length to find the optimal pulse length, and to add or subtract the value of the recording pulse T_top3 of the timing that forms a 3T mark that has a significant effect on the recording performance. It is preferable.

Of course, the timing factor tuned at the time of resetting the write strategy is not limited to the initial write pulse as in this embodiment. As described above, the present invention finds and resets the optimal write strategy according to the tilt of the optical disc, thereby improving the stability of recording.

Next, on the basis of the reset write strategy, recording of the data area of the optical disc is resumed (S115) to complete recording by a stop command or the like.

It has been described so far limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be construed as naturally included in the technical spirit described in the claims of the present invention.

As described above, the present invention has the effect of maximizing the stability of recording by increasing the stability of the recording by resetting the writing strategy when the tilt of the optical disc falls within the setting range while performing the recording with the initial writing strategy.

Claims (5)

(a) setting the recording start power by performing an optimum power control (OPC) process of selecting an appropriate recording power by a write strategy or a preset write strategy based on the information of the optical disc when the insertion of the optical disc is recognized; , (b) recording data to be recorded in the data area of the optical disc using the set recording start power while monitoring the tilt change of the optical disc; (c) When the tilt of the optical disk being monitored falls within the setting range, the recording is paused and the timing factor indicating the minimum jitter is measured after performing the test recording while changing the timing factor of the writing strategy in the preset write strategy compensation section. Detecting and resetting the write strategy, (d) resuming recording of the data area of the optical disc based on the reset write strategy; Recording method of the optical record player comprising a. The method of claim 1, In step (c), the timing factor to be changed for resetting the write strategy is a preset number of initial write pulse lengths. The recording method of the optical recorder, characterized in that. The method according to claim 1 or 2, The change of the timing factor is to add or subtract the value of the recording pulse T_top3 of the timing forming the 3T mark. The recording method of the optical recorder, characterized in that. The method of claim 1, The tilt setting range of the step (c) is a value within a margin of a set percentage at each of the minimum and maximum values in a range from a preset minimum value to a maximum value which maintains recording performance by displacing the optical pickup. The recording method of the optical recorder, characterized in that. The method of claim 4, wherein The margin is within 10% The recording method of the optical recorder, characterized in that.

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