KR100925221B1 - Recording power adjusting device and method for each recording section - Google Patents

Abstract

The present invention relates to a recording power adjustment apparatus and method for each recording section. For example, when performing a data recording operation on a media such as a DVD, a write strategy table information is searched for. After determining whether forced adjustment of the recording power is necessary, if forced adjustment is necessary, the power adjustment rate for each recording section included in the write strategy table information is read, and the power adjustment rate and current data for each recording section are read. By comparing the recording positions, by increasing or decreasing the recording power, an optimum recording power adjustment is made even for a specific recording section in which the power margin changes rapidly, so that the data recording quality can be efficiently reduced in the specific recording section. You can prevent it.

Write strategy table, forced power adjustment flag, power adjustment rate by recording section

Description

Apparatus and method for controlling write power each record section}

The present invention relates to an apparatus and method for adjusting recording power for each recording section, for example, to record data by irradiating a laser beam onto media such as a DVD or the like, but recording the laser beam for each recording section. The present invention relates to a recording power adjustment apparatus and method for each recording section for variably adjusting power so that an optimal data recording operation can be performed.

In general, in an optical disc drive (ODD) or an optical disc device that records data by irradiating a laser beam onto a medium such as a DVD, a data recording operation is performed when a medium such as a DVD is inserted into the device. Prior to this, predetermined test data is recorded in a specific area of the media to calculate an optimum recording power.

For example, the predetermined test data is recorded in the power calibration area (PCA) area allocated before the lead-in area of the DVD while gradually increasing the recording power. By reading the test data, an error rate is performed to perform a series of optical power calibration (OPC) operations that calculate the smallest recording power as the optimal recording power.

In addition, a write strategy (WS) suitable for the DVD is determined and applied. For example, as shown in FIG. 1, the margin upper limit margin margin (Margin_Max) and the margin lower limit value previously set as shown in FIG. 1. Within the range not exceeding Margin_Min, a collective power up rate for applying the recording power gradually increases toward the disc circumferential direction is applied.

However, when the recording power increase rate that is gradually increased as described above is applied, the recording power that is optimal for a specific recording section whose power margin changes rapidly, for example, A section and B section, as shown in FIG. Since no adjustment is made, there is a problem that the data recording quality in the corresponding section is deteriorated.

Accordingly, the present invention was created to solve the above problems. For example, when performing a data recording operation on a media such as a DVD, a write strategy table information is searched for. After determining whether forced adjustment of the recording power is necessary, if forced adjustment is necessary, the power adjustment rates for each recording section included in the write strategy table information are read, and the recording power is adjusted according to the current data recording position. SUMMARY OF THE INVENTION An object of the present invention is to provide a recording power adjusting device and a method for recording section for increasing or decreasing the recording power.

In the recording power adjustment method for each recording section according to the present invention for achieving the above object, when performing the data recording operation, by searching the write strategy table information, it is determined whether the forced adjustment of the recording power is required Step 1 to do; Reading the power adjustment rate for each recording section included in the write strategy table information if forced adjustment is necessary as a result of the determination; And increasing or decreasing recording power according to the read power adjustment rate for each recording section.

The write strategy table information may include at least one of a media ID, a forced power adjustment flag, and power adjustment rates for each recording section.

In the second step, if the forced power adjustment flag is searched and confirmed, and the forced adjustment is determined to be necessary, the power adjustment rates for the respective recording sections are read.

In addition, the step 3, characterized in that to increase or decrease the recording power by comparing the read power adjustment rate for each recording section and the current data recording position,

In addition, the recording power adjustment apparatus for each recording section according to the present invention includes: recording means for recording data by firing a laser beam; Storage means for storing write strategy table information; And control means for reading out the power adjustment rate for each recording section included in the write strategy table information to increase or decrease the recording power of the recording means when performing a data recording operation. ,

The write strategy table information may include at least one of a media ID, a forced power adjustment flag, and power adjustment rates for each recording section.

The control means may search for and confirm the forced power adjustment flag, and if it is determined that forced adjustment is necessary, the control means reads out the power adjustment rates for each recording section.

The control means may increase or decrease recording power by comparing the read power adjustment rate for each recording section with the current data recording position.

The recording power adjustment apparatus and method for each recording section according to the present invention, when performing a data recording operation on a media such as DVD (DVD), for example, by searching the write strategy table information, recording After determining whether a forced adjustment of power is necessary, if forced adjustment is necessary, the power adjustment rate for each recording section included in the write strategy table information is read, and the power adjustment rate for the recording section and the current data recording position are read. By comparing with, by increasing or decreasing the recording power, the optimum recording power is adjusted even for a specific recording section in which the power margin changes rapidly, so that the data recording quality can be effectively prevented in the specific recording section. Will be.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a recording power adjusting apparatus and method for each recording section according to the present invention will be described in detail with reference to the accompanying drawings.

Apparatus and method for adjusting recording power for each recording section according to the present invention, for example, is applied to an optical disk drive (ODD) or an optical disk device that records data by firing a laser beam onto media such as a DVD or the like. For example, as shown in FIG. 2, the optical disc device includes an optical disc 10, an optical pickup 11, an RF processor 12, a digital signal processor 13, a microcomputer 14, and an LD. (Laser Diode) A driver 15, a servo unit 16, a memory 17, and the like are included.

On the other hand, as the memory 17, a nonvolatile memory such as an EEPROM or a flash memory is used. The memory 17 has a write strategy WS as shown in FIG. Table information is stored and managed.

In addition, the write strategy table information includes a unique media ID, a compulsory power control flag (Compulsory Power Control_Flag), and power adjustment rates (Section #_Power Control Rate) for each recording section. For example, when the forced power adjustment flag has a value of '1', the power adjustment rates for each recording section have different values.

For example, as shown in FIG. 3, a recording power increase rate (Power Up) for variably adjusting the recording power within a range not exceeding the margin upper limit margin Margin_Max and margin lower limit margin Margin_Min. Since the Rate) is set differently for each recording section, the optimum recording power adjustment is also performed for the sections A and B of FIG. 3, which will be described in detail as follows.

4 is a flowchart illustrating an operation of adjusting recording power for each recording section according to the present invention. For example, in the microcomputer 14, when an optical disc 10 such as a DVD is inserted into a device, FIG. Before performing a data write operation, the LD driver 15 is operated to perform an OPC operation for calculating an optimal write power, and then a write strategy WS is applied. It performs a series of operations (S10).

When the start of data recording is requested in the microcomputer 14 (S11), the LD driver 15 is operated to perform a data writing operation for recording data at the optimal recording power (S12). ).

In addition, the microcomputer 14 checks the unique media ID assigned to the optical disc 10, and then writes the write strategy table information on which the corresponding media ID is recorded. ).

When the compulsory power control flag in the searched write strategy table information is checked (S13), for example, when the value of the compulsory power control flag is '1', each recording section is performed. It is determined that other recording power adjustment is necessary (S14).

On the other hand, if the value of the forced power adjustment flag is '0', it is determined that the recording power adjustment for each recording section is not necessary. In this case, as described above with reference to FIG. Within a range not exceeding the upper limit Margin_Max and the margin lower limit Margin_Min, a collective recording power up rate is applied so that the recording power gradually increases toward the disc circumferential direction (S15). .

On the other hand, if the value of the forced power adjustment flag is '1', it is determined that the recording power adjustment for each recording section is necessary. In this case, the microcomputer 14 includes the recording in the write strategy table information. The power adjustment rates for each recording section are searched and confirmed (S16).

The microcomputer 14 checks the current recording position and variably applies the power adjustment rate for each recording section corresponding to the recording position (S17). If it corresponds to one section (eg, dd0000 to e00000), the first section power adjustment rate (Section 1_Power Control Rate) is applied to increase the recording power.

In addition, in the microcomputer 14, when the current recording position corresponds to the second section (eg, e00000 to e80000), the second section power adjustment rate (Section 2_Power Control Rate) is applied to reduce the recording power ( Since a series of power adjustment operations for each recording section are performed until the data recording operation is stopped (S18), for example, as shown in FIG. 3, for example, as shown in FIG. In the case of section A and section B, the optimum recording power can be adjusted, thereby effectively preventing the data recording quality from deteriorating in the specific recording section.

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.

1 illustrates an embodiment of a general write power increase rate,

2 illustrates a configuration of an optical disk device to which the present invention is applied.

3 illustrates an embodiment of a recording power increase rate for each recording section according to the present invention;

4 is a flowchart illustrating an operation of adjusting a recording power for each recording section according to the present invention.

※ Explanation of code for main part of drawing

10: optical disc 11: optical pickup

12: RF processing unit 13: digital signal processing unit

14: Micom 15: LD driver

16: servo unit 17: memory

Claims (8)

Searching for write strategy table information including a media ID, a forced power adjustment flag, and power adjustment rates for each recording section when performing a data recording operation; Searching for the forced power adjustment flag and determining that forced adjustment is necessary, and reading out the power adjustment rates for each recording section; And And increasing or decreasing the recording power in accordance with the read-out power adjustment rate for each recording section. delete delete The method of claim 1, And wherein said step 3 compares the read power adjustment rate for each recording section with a current data recording position to increase or decrease recording power. Recording means for firing a laser beam to record data; Storage means for storing write strategy information including a media ID, a forced power adjustment flag, and power adjustment rates for each recording section; And Control means for searching and confirming the forced power adjustment flag when performing a data recording operation, and if it is determined that forced adjustment is necessary, reading the power adjustment rates for each recording section to increase or decrease the recording power of the recording means. Recording power adjustment apparatus for each recording section, characterized in that comprising a. delete delete The method of claim 5, And the control means compares the read-out power adjustment rate for each recording section with a current data recording position to increase or decrease recording power.

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