KR100726565B1 - How to set the optimal recording voltage for optical disc recording and playback devices - Google Patents

Abstract

The present invention relates to a method of setting an optimal recording voltage of an optical disc recording and reproducing apparatus. In particular, when the optical disc is not an optical disc recorded more than once, OPC is performed and the recording voltage information thereof is stored in a memory, and the optical disc is recorded at least once. In the case of the optical disc, the OPC is performed using the write voltage stored in the memory and the write voltage thereof is determined. If the determined write voltage is not within the preset range, the OPC is re-executed by adjusting the write voltage by the preset range and the write voltage thereof. Determine the average of the stored write voltage and the determined write voltage so that the jitter and bit error rate are within the preset ranges, rerun the OPC with the average write voltage, and rerun the OPC. The jitter and bit error rate measured from the determined write voltage If it is over by setting the stored write voltage and the average value of the determined write voltage to the optimum write voltage and performs data recording. Therefore, the present invention can set the optimal recording voltage using the recording voltage, jitter, and bit error rate of the optical disc stored in the memory, thereby increasing the success rate of writing on the rewritable optical disc.

Description

How to set the optimal recording voltage for optical disc recording and playback devices {METHOD FOR SETTING CONTROLLING WRITING POWER OF OPTICAL DISK WRITER AND READER}

1 is a block diagram showing an optical disk recording and reproducing apparatus to which an optimal recording voltage setting method according to the present invention is applied;

2 is a flowchart sequentially showing a method for setting an optimum recording voltage of an optical disc according to an embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

10 optical disc 20 optical pickup section

30: optical drive unit 40: channel bit encoder

50: digital recording signal processing unit 60: RF unit

70: servo unit 80: digital reproduction signal processing unit

90: driving unit 100: control unit

100: key input unit 120: memory (EEPROM)

130: spindle motor 140: sled motor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method of an optical disc. In particular, an optimal recording voltage setting of an optical disc recording and reproducing apparatus that can greatly improve the recording performance of a rewritable optical disc during optimal recording voltage adjustment (OPC) of the optical disc. It is about a method.

In general, optical recording media include discs for playback only such as CD-ROM (CD-Read Only Memory), DVD-ROM, etc., CD-Write Once Read Many (CD-WORM), DVD-WORM, etc. And write-once discs such as CD-RW (CD-Rewritable) and DVD-Random Access Memory (DVD-RAM).

On the other hand, the recording area arrangement of the recordable 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 voltage for recording data on the disk, and the PMA has head address information of the track on which 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 disc is recorded in the program area.

The recording and reproducing apparatus of such an optical disc drives a 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, and at the same time the information recording layer The information is reproduced from the optical disc using a light beam of small energy that does not change its physical properties.

In order to improve the recording performance of the optical disc, the entire recording area of the optical disc should be recorded at a suitable recording voltage. For this purpose, it is necessary to perform an OPC process for setting a recording voltage suitable for the disk before recording the optical disk.

On the other hand, the method of setting the optimum recording voltage in the rewritable optical disc by the prior art proceeds as follows.

First, when an optical disc such as a rewritable DVD-RW (+ RW) is loaded, the format data of the ATIP (Absolute Time In Pre-groove) information recorded on the optical disc is recognized, and the gamma (γ) target value of the optimum recording voltage is recognized. Read

The counter area in the PCA of the optical disc is inspected to determine the position to perform the OPC, and the data recorded in the test area is deleted after moving the optical pickup unit to the test area in the PCA.

The optical diode is rotated at an optimal speed provided by the optical disc, and a laser diode is driven in one of the regions where the OPC is to be performed, that is, the test region, to irradiate a light beam according to the test data and perform recording. At the time of writing, the write voltage raises the voltage every 21 ATIP.

After reproducing the data recorded in the test area on the optical disc, the RF signal of the data recorded on the optical disc is detected for 21 ATIP, the RF signal is sampled and digitized, and the target gamma value γ corresponding to the RF signal is measured. .

Then, the write voltage corresponding to the target gamma value gamma is obtained, and the write voltage is set to the optimum write voltage.

However, such a rewritable optical disc recording and reproducing apparatus such as DVD-RW (+ RW) not only sets the correct optimal recording voltage but also needs to record data with less variation in the recording voltage even if the optical disc is rewritten many times. There was this.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art as described above, and by using the write voltage stored in the regiproxy memory of the optical disc and storing the jitter and bit error rate by storing the write voltage information according to the performance of OPC of the optical disc. SUMMARY OF THE INVENTION An object of the present invention is to provide an optimal recording voltage setting method of an optical disc recording and reproducing apparatus that can increase the success rate of recording on a rewritable optical disc by setting an optimal recording voltage.

In order to achieve the above object, the present invention provides a device for recording and reproducing data on an optical disc, the method comprising: performing an OPC if the optical disc is not recorded more than once and storing the recording voltage information thereof in a memory; OPC is performed using the write voltage stored in the memory when the optical disk has been recorded more than once, and the write voltage thereof is determined, and when the determined write voltage is not within the preset range, the write voltage is adjusted by the preset range. Re-executing the OPC and determining its write voltage, measuring the jitter and bit error rate of the determined write voltage to average the stored write voltage and the determined write voltage so that the jitter and bit error rate are within a predetermined range, and recording the average Rerun the OPC with the voltage, and from the write voltage determined by the OPC rerun The jitter and the bit error rate is a group if the predetermined range set the stored write voltage and the average value of the determined write voltage to the optimum write voltage will be performing a data write.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a block diagram showing an optical disk recording and reproducing apparatus to which an optimal recording voltage setting method according to the present invention is applied.

As shown in Fig. 1, an optical disc recording and reproducing apparatus according to the present invention includes an optical pickup section 20, an optical drive section 30, a channel bit encoder 40, a digital record signal processing section 50, , RF unit 60, servo unit 70, digital reproduction signal processing unit 80, drive unit 90, control unit 100, key input unit 110, memory 120, spindle motor 130, the sled motor 140, and the like.

The optical pickup unit 20 records the optical drive signal of the optical drive unit 30 on the optical disc 10, detects the signal recorded from the optical disc 10, and transmits the signal to the RF unit 60. To this end, a laser diode (LD) for irradiating a light beam to the optical disc 10 to record data on the optical disc 10 and a data recorded on the optical disc 10 by irradiating a light beam to the optical disc 10. A photo diode (PD) is read.

The optical driver 30 converts the signal of the channel bit encoder 40 into an optical drive signal for recording on the optical disk 10 and transmits the signal to the optical pickup unit 20.

The channel bit encoder 40 reconverts the data converted into the recording format into a bit stream and transmits the data to the optical driver 30.

The digital recording signal processor 50 adds an error correction code (ECC) or the like to the input digital data, converts it into recording format data, and transmits the converted format data to the channel bit encoder 40.

The RF unit 60 amplifies and waveform-shapes the RF signal detected by the optical pickup unit 20 and modulates a modulated signal, such as an EFM (Eight to Fourteen Modulation) signal, to the control unit 100 or the digital reproduction signal processing unit 80. To pass.

The servo unit 70 controls the driving of the driving unit 90 from the tracking error (TE) and focus error (FE) signals of the optical pickup unit 20 and the rotational speed of the optical disc 10.

The digital reproduction signal processing unit 80 digitally processes the EFM signal of the RF unit 60 and restores the original data to output the reproduced data.

The driving unit 90 drives the sled motor 140 for moving the optical pickup unit 20 and the spindle motor 130 for rotating the optical disk 10.

When the OPC of the rewritable optical disc 10 is performed, the controller 100 stores the write voltage information according to the OPC operation in the memory 120 and then uses the write voltage stored in the rewritten memory 10 of the optical disc 10. OPC is performed, and the jitter and bit error rate of the write voltage obtained according to the OPC are measured to control the optimum write voltage. Then, the controller 100 controls to perform data recording of the optical disc 10 at the set optimal recording voltage.

The key input unit 110 is a portion for inputting operation key signals of the rewritable optical disc recording and reproducing apparatus.

The memory 120 is a memory device such as an EEPROM, and stores the optimal recording voltage information obtained by performing the OPC of the optical disc 10, and information such as the accumulation count, focus and tilt offset, and radial gain.

The optical disk recording and reproducing apparatus according to the present invention having such a configuration stores the recording voltage information according to the performance of OPC during the first recording of the rewritable optical disk 10 in the memory 120. The OPC is performed using the write voltage stored in the rewrite memory 10 of the optical disc 10. If the write voltage determined according to the OPC is not within a preset range (for example, ± 1 Hz), the write voltage is written. Perform the OPC again by adjusting the set range (eg ± 1 ms). After measuring the jitter and bit error rate of the determined write voltage according to OPC re-execution, average the write voltage and the determined write voltage so that the jitter and bit error rate are in the preset range, and then perform the OPC again with the average write voltage. Measure the jitter and bit error rate of the write voltage determined by re-execution, and if the jitter and bit error rate are not within the preset range, set the determined write voltage to the optimum write voltage and perform data recording. If it is within the set range, data recording is performed by setting the average value of the stored write voltage and the determined write voltage to an optimum write voltage.

2 is a flowchart sequentially illustrating a method of setting an optimal recording voltage of an optical disk according to an embodiment of the present invention.

1 and 2, a method of setting an optimal recording voltage of an optical disk according to an embodiment of the present invention proceeds as follows.

First, when an optical disc 10 such as a rewritable DVD-RW (+ RW) is loaded and a recording key signal is input from the key input unit 110, the optical pickup unit 20 and the RF unit 60 are controlled by the control unit 100. By recognizing the format data of the ATIP information recorded on the optical disk 10 through the determination whether it is the optical disk 10 recorded at least once (S10).

As a result of the determination in S10, when the optical disc 10 is not the optical disc 10 recorded one or more times, the controller 100 reads a gamma (γ) target value for the recording voltage of the ATIP information of the optical disc 10, and the driving unit 40. After controlling the optical pickup unit 20 to move to the test area in the PCA to delete the data recorded in the test area through the laser diode. In addition, the controller 100 controls the driving unit 40 to drive the spindle motor M to rotate at the optimum speed provided by the optical disk 10, while the optical disk 10 and the optical drive unit 30 drive the optical disk. The test signal according to the ATIP information read in step 10 is provided to the laser diode of the optical pickup unit 20 to perform an OPC process for recording in any one of the test areas in the PCA. (S34) In this case, the test signal is an optical disc. The write voltage is increased for every 21 ATIP in the specific area (10).

The control unit 100 reproduces the data recorded in the test area of the optical disc 10 through the photodiode of the optical pickup unit 20, and the RF signal of the data recorded on the optical disc 10 through the RF unit 60. After detection, sampling and digitizing, the target gamma value γ corresponding to the RF signal is measured. In addition, the controller 100 sets the write voltage corresponding to the target gamma value γ measured by the RF unit 60 to an optimal write voltage (S36).

The controller 100 stores the set optimal write voltage information (eg, including the target gamma value γ) in the memory 120 and controls to perform data recording of the optical disc 10 at the set optimal write voltage. (S38 to S40)

On the other hand, if it is determined in S10 that the optical disc 10 is the optical disc 10 recorded one or more times, the control unit 100 includes the optimal recording voltage information (eg, the target gamma value γ) of the optical disc 10 stored in the memory 120. The control unit 40 controls the driving unit 40 to move the optical pickup unit 20 to the test area in the PCA, and then deletes the data recorded in the test area through the laser diode (S12).

In addition, the controller 100 controls the driving unit 40 to drive the spindle motor M to rotate at the optimum speed provided by the optical disk 10, while the memory is controlled through the channel bit encoder 40 and the optical driving unit 30. The test signal according to the recording voltage information read at 120 is provided to the laser diode of the optical pickup unit 20 to perform an OPC process for recording in any one of the test regions in the PCA. The recording voltage is increased every 21 ATIP in a specific area of the optical disc 10.

The control unit 100 reproduces the data recorded in the test area of the optical disc 10 through the photodiode of the optical pickup unit 20, and receives the RF signal of the data recorded on the optical disc 10 through the RF unit 60. After detection, sampling and digitizing, the target gamma value γ corresponding to the RF signal is measured. The controller 100 determines a write voltage corresponding to the target gamma value γ measured by the RF unit 60 as an optimal write voltage (S16).

The controller 100 determines whether the determined optimal write voltage is within a preset range (eg, between ± 1 mA) (S18).

As a result of the determination in S18, when the determined optimal write voltage is not within a preset range (for example, ± 1 mA), the controller 100 adjusts the write voltage by +, − by a preset range (for example, ± 1 mA) to adjust the OPC. Try again. (S20 ~ S22)

The control unit 100 reproduces the data recorded on the optical disc 10 according to the OPC re-execution, and corresponds to the target gamma value γ measured from the RF signal of the data recorded on the optical disc 10 through the RF unit 60. Obtain the write voltage.

The controller 100 measures the jitter and bit error rates from the write voltage obtained by OPC rerun, and determines whether the jitter and bit error rates are within a predetermined range (S24).

As a result of the determination of S24, when the jitter and the bit error rate are not within the preset range, the controller 100 obtains an average of the write voltage stored in the memory 120 and the write voltage determined according to the OPC re-execution. Then, the controller 100 causes the OPC to be re-run with the average write voltage.

The control unit 100 reproduces the data recorded on the optical disc 10 according to the OPC re-execution of S26 through the optical pickup unit 20, and the RF signal of the data recorded on the optical disc 10 via the RF unit 60. The write voltage corresponding to the target gamma value? Then, the jitter and bit error rate are measured again at the write voltage obtained by OPC re-execution, and it is again determined whether the measured jitter and bit error rate are within a predetermined range.

If the jitter and the bit error rate are not within the preset range as a result of the determination in S28, the controller 100 sets the recording voltage determined according to the OPC rerun to an optimal recording voltage to perform data recording of the optical disc 10. (S30 )

As a result of the determination of S28, when the jitter and the bit error rate are within a predetermined range, the controller 100 sets the average value of the write voltage stored in the memory 120 and the write voltage determined according to the OPC rerun to an optimal write voltage. Perform data recording of 10) (S32).

On the other hand, if it is determined in S18 that the determined optimal write voltage is within a preset range (for example, ± 1 dB), or if the result of S24 determines that the jitter and bit error rate are in the preset range, the controller 100 determines the set optimal write voltage. In this case, the data recording on the optical disc 10 is performed.

Therefore, the method of setting an optimal recording voltage of the optical disk according to the present invention stores the recording voltage information according to the OPC at the time of initial recording of the rewritable optical disk 10 in the memory 120.

In addition, the present invention performs OPC with the write voltage stored in the rewrite memory 10 of the optical disc 10 so that the write voltage when the write voltage recorded on the optical disc 10 is not within a preset range (for example, ± 1 Hz). Execute the OPC again by adjusting the value by a preset range (for example, ± 1 ms). After measuring the jitter and bit error rate of the determined write voltage according to the OPC re-execution, average the stored write voltage and the determined write voltage so that the jitter and bit error rate are in the preset range, and then re-perform the OPC with the average write voltage. Measure the jitter and bit error rate of the write voltage determined according to OPC redo, and if the jitter and bit error rate are within the preset range, set the average value of the stored write voltage and the determined write voltage as the optimum write voltage and perform data recording. .

As described above, the present invention stores the recording voltage information according to the performance of the OPC of the optical disk in the memory, and then re-performs the OPC by using the recording voltage stored in the re-write memory of the optical disk and the recording voltage of the optical disk obtained by performing the OPC re-execution Set the optimal write voltage by measuring the jitter and bit error rates.

Therefore, the present invention can set the optimal recording voltage using the recording voltage, jitter, and bit error rate of the optical disc stored in the memory, thereby increasing the success rate of writing on the rewritable optical disc.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

Claims (2)

delete An optimal recording voltage setting method of an optical disc recording and reproducing apparatus, Performing an OPC if the optical disc is not an optical disc recorded more than once and storing the recording voltage information thereof in a memory; If the optical disc is an optical disc recorded one or more times, performing OPC using the write voltage stored in the memory and determining the write voltage thereof; If the determined write voltage is not within the preset range, adjusting the write voltage by the preset range, re-performing the OPC and determining the write voltage thereof; Measuring the jitter and bit error rate of the determined write voltage to obtain an average of the stored write voltage and the determined write voltage such that the jitter and bit error rate are within a predetermined range; OPC is re-executed with the average write voltage, and when the jitter and bit error rate measured from the write voltage determined according to the OPC re-execution are within a preset range, the average value of the stored write voltage and the determined write voltage is set to an optimal write voltage. Performing data recording, Performing data recording by setting the determined write voltage to an optimal write voltage when the jitter and bit error rate measured from the write voltage determined according to the OPC re-execution are not within a preset range. An optimal recording voltage setting method of an optical disc recording and reproducing apparatus comprising a.

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