KR100696838B1 - Recording method for optical recorder - Google Patents

Abstract

A recording method of an optical recording/reproducing device is provided to be capable of resetting write strategies based on trial recording results by changing timing factors in write strategy compensation sectors after power is compensated, thus recording stability is magnified. When insertion of an optical disk is recognized, recording start power is set by performing an OPC(Optimum Power Control) process of selecting proper recording power by preset write strategies or write strategies based on information on the disk(S101,S102). Data to be recorded is recorded in a data area of the disk by using the set recording start power(S103,S104). After a trial recording process is performed as timing factors of the write strategies are changed in preset write strategy compensation sections in a state of the recording process being temporarily interrupted, a timing factor indicative of minimum jitters is detected to reset the write strategies(S105-S108). The recording process for the data area of the disk is resumed on the basis of the reset write strategies to complete the recording process(S109-S111).

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;

3 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 finding and recording an optimal write strategy for each region of an optical disk 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. ). 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 that recognizes the type of the inserted optical disc 11 (S21) sets a write strategy to improve recording performance (S22). In step S23, an optimal power control (OPC) process 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 (S24).

On the other hand, after the initial recording is performed after a certain area or a certain time, it is confirmed whether the current recording power is optimal at the current position, and compensation is performed for the fluctuation part to continue recording. In the power correction area, an interrupt signal for power correction is When enabled, recording is paused (S25), and power compensation is performed. Here, the power compensation compensates for the power (S26) compared to the OPC geometry after the final track asymmetry (Osymmetry) check.

Subsequently, recording is performed next to the last recording track (S27), and when the stop command is selected (S28), recording on the optical disc 11 is stopped (S29).

According to the conventional technology, the recording power is checked by checking whether the current recording power is optimal at the current position and compensating for the fluctuation part in each power correction area, but the timing factor of the write strategy uses a fixed value. have.

The composition of the write strategy is set by a combination of timings at appropriate powers. The optimal write strategy on the inner and outer circumferences of the optical disc is changed by skew of the optical disc, uneven circumference of the optical disc, skew of the optical recorder, and the like.

However, according to the prior art, when the initial writing strategy is set, recording is performed by using a writing strategy based on the information of the optical disk or a writing strategy set in advance by the manufacturer of the optical record player, and during writing, the writing strategy is changed without changing the writing strategy. Since only the set value is used, there is a problem in reaching the limit in securing the safety of the recording.

The present invention has been proposed to solve such a conventional problem, and resets the write strategy based on the test result by changing the timing factor in the write strategy compensation section after compensating power after a certain area or a certain time after performing the initial recording. By doing so, the objective is to increase the success rate of recording by maximizing the stability of recording.

In the recording method of the optical recorder according to the present invention for realizing the above object, if the insertion of the optical disc is recognized, performing the OPC process of selecting a suitable recording power by a write strategy based on the information of the optical disc or a preset write strategy. Setting the recording start power through the recording; recording the data to be recorded in the data area of the optical disc using the set recording start power; and recording is paused after a certain area or a predetermined time after the data is recorded. Performing a test recording while changing the timing factor of the write strategy in the preset write strategy compensation section, and resetting the write strategy by detecting a timing factor indicating the minimum jitter, and the data area of the optical disc based on the reset write strategy. Resuming recording for and completing the recording. .

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.

3 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 S103, the step of recording the data to be recorded in the data area of the optical disc in accordance with the file structure using the set recording start power (S104); Compensating the recording power in order to compensate for the variation of the geometry in comparison with the OPC at the stationary state after checking the geometry from the final recording track (S105 to S106), and writing strategy in the preset write strategy compensation section. Minimum test jitter after performing test recording with compensated recording power by changing the timing factor of Detects a timing factor to reset the write strategy (S107 to S108), and resumes recording to the data area of the optical disc based on the compensated write power and the reset write strategy to complete the recording (S109 to S111). It is configured to include).

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 (S102) or the OPC process of selecting an appropriate recording power using a writing strategy preset to the manufacturer of the optical recorder ( Through S103), recording start power is set.

Then, data to be recorded is recorded in the data area of the optical disc in accordance with the file structure by using the set recording start power (S104).

When recording reaches a certain area of the optical disc or when the interrupt signal for power correction is enabled after a certain recording time, recording is paused (S105). After checking the geometry from the last recording track, it compares with that of the OPC. The recording power is compensated for (S106) to compensate for the variation of the geometry.

In addition, after changing the timing factor of the write strategy in the preset write strategy compensation section, test recording is performed with the compensated recording power (S107), and then, the timing factor indicating the minimum jitter is detected to reset the write strategy (S108).

In detail, the write strategy compensation interval is set from the recording end of the optical disc to a previous predetermined area, and the first recording pulse length ttop, the multipulse length tmp, and the final pulse length tlp, which are the main timing factors, are one step. Each time, recording is performed using the current value, the value subtracted 1 step from the present value, and the value added by 1 step from the present value, and the timing factor at which the jitter amount is minimized by detecting the jitter amount of the obtained signal. Detect and reset the write strategy. At this time, if the optimal value of the minimum jitter is determined during the tuning of the first write pulse length (ttop), the write strategy is immediately modified to be used for the tuning of the multipulse length (tmp), and the tuning of the multi-pulse length (tmp) is performed. The result is also immediately applied to rewriting the write strategy and used to tune the final pulse length (tlp). Of course, the timing factors to be tuned at the time of resetting the write strategy may be limited to three, one or two, or added as many as in this embodiment, and the tuning order of the timing factors is most preferable in this embodiment. Any amount can be changed.

As described above, the present invention finds and resets the optimal write strategy according to the characteristics of the optical disc, so that the write strategy is changed in response to the skew of the optical disc, the circumference of the optical disc, the skew of the optical recorder, and the like. will be.

On the other hand, the write strategy compensation section is set as a defect area so that the corresponding section is skipped during playback.

Next, recording on the data area of the optical disc is resumed (S109) based on the compensated recording power and the reset write strategy, and the recording is completed or stopped by the stop command (S110) or the like (S104).

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.

For example, the power compensation performed in step S106 is preferably performed before resetting the write strategy as described above for optimal recording performance, but immediately resetting the write strategy in a state in which recording is paused without performing power compensation. Even if is performed, the effect of improving the recording stability according to the present invention is still provided.

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 resets the writing strategy based on the test recording result by changing the timing factor in the writing strategy compensation section after compensating power after a certain area or a predetermined time after performing the initial recording, thereby maximizing the stability of the recording. This has the effect of increasing the success rate.

Claims (7)

(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; (c) Timing indicating the minimum jitter after performing the test recording while changing the timing factor of the writing strategy in a predetermined write strategy compensation section in a state where recording is paused after a predetermined time or a predetermined time after the writing of the data. Resetting the write strategy by detecting a factor; (d) resuming recording of the data area of the optical disk based on the reset write strategy to complete recording; Recording method of the optical record player comprising a. The method of claim 1, In the step (c), the write strategy compensation section is set from a recording end of the optical disc to a previous predetermined area. The recording method of the optical recorder, characterized in that. The method of claim 1, In the step (c), the timing factor to be changed for resetting the write strategy includes at least one of a first write pulse length, a multipulse length, and a final pulse length. The recording method of the optical recorder, characterized in that. The method of claim 3, wherein The test recording in step (c) is to subtract or decrement the length of the pulses by one step. The recording method of the optical recorder, characterized in that. The method of claim 3, wherein When the timing factor to be changed for resetting the write strategy in step (c) includes a plurality of factors among the first write pulse length, the multipulse length, and the last pulse length, as soon as the optimum value of the first factor is determined, Applied to rewriting write strategy, when tuning second argument The recording method of the optical recorder, characterized in that. The method according to claim 3 or 5, In step (c), the timing factor to be changed for resetting the write strategy includes a plurality of factors among a first write pulse length, a multipulse length, and a final pulse length, and among the plurality of factors, the first write pulse length. Tuning the first write pulse length at the time of rewriting the write strategy, when The recording method of the optical recorder, characterized in that. The method according to claim 3 or 5, In the step (c), the timing factor to be changed for resetting the write strategy includes a first write pulse length, a multipulse length, and a final pulse length, the first write pulse length being tuned first, and the multi Tuning the pulse length to the next, and finally tuning the last pulse length The recording method of the optical recorder, characterized in that.

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