KR20120020740A - Apparatus and method for controlling laser power of rewritable optical disc - Google Patents

Apparatus and method for controlling laser power of rewritable optical disc Download PDF

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Publication number
KR20120020740A
KR20120020740A KR1020100084553A KR20100084553A KR20120020740A KR 20120020740 A KR20120020740 A KR 20120020740A KR 1020100084553 A KR1020100084553 A KR 1020100084553A KR 20100084553 A KR20100084553 A KR 20100084553A KR 20120020740 A KR20120020740 A KR 20120020740A
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KR
South Korea
Prior art keywords
optical power
power adjustment
optical
useful information
optical disc
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Application number
KR1020100084553A
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Korean (ko)
Inventor
최봉수
Original Assignee
주식회사 히타치엘지 데이터 스토리지 코리아
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Application filed by 주식회사 히타치엘지 데이터 스토리지 코리아 filed Critical 주식회사 히타치엘지 데이터 스토리지 코리아
Priority to KR1020100084553A priority Critical patent/KR20120020740A/en
Publication of KR20120020740A publication Critical patent/KR20120020740A/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1267—Power calibration
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/215—Recordable discs
    • G11B2220/216—Rewritable discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

The apparatus and method for adjusting optical power of a rewritable optical disc according to the present invention may perform, for example, an optical power adjustment (OPC) operation in a test zone allocated to a PCA area of a rewritable optical disc. Useful information related to the optical power adjustment, such as the optimal optical power adjustment value, the identification information of the optical disk drive, the firmware version of the optical disk drive, and the temperature at the time of optical power adjustment, is superimposed on the test section, and then the optical power adjustment is performed. When the mode is set again, the useful information can be read and the validity can be determined, and then the data recording operation can be performed more quickly by applying the optimal optical power value read as the useful information without the optical power adjusting operation. .

Description

Apparatus and method for controlling laser power of rewritable optical disc}

The present invention is, for example, an optical disc of a rewritable optical disc applied to an optical disc drive (ODD) for recording or playing back data on an optical disc such as a CD, a DVD, a BD, or the like. A power regulation apparatus and method.

In general, optical discs include reproduction-only optical discs (ROM), write once optical discs (Recordable), and rewritable optical discs (Rewritable). The rewritable optical discs may include, for example, CD-RW, DVD-RW, There are several types such as DVD-RAM, BD-RE, etc.

On the other hand, in an optical disc drive (ODD) for recording or reproducing data on an optical disc as described above, for example, when a rewritable DVD (DVD-RW) is inserted into the drive, the data is recorded in the optical pickup before recording the data. An embedded laser diode is performed with a series of Optimum Power Calibration (OPC) operations that adjust the included laser diode to an optimal optical power value suitable for data recording.

For example, as shown in FIG. 1, after accessing a PCA (PCA) area of a rewritable DVD (RW-RW), it is allocated to 16 sectors of ECC Error Correction Code (ECC) blocks. In the test section (eg, Test Zone 1), random test data is recorded sequentially while increasing the optical power value (eg, 1 ~ 16mW) of 16 steps.

After reproducing the test data recorded as described above, detecting the jitter value indicating the error rate (%) of the reproduced signal, the optical power value at the time when the minimum jitter value is detected is optimal. A series of optical power adjustments are performed to calculate the power value.

In addition, the optical disk drive performs a series of data recording operations for recording audio and video data desired by a user in the data area of the rewritable DVD by applying the optimal optical power value calculated as described above. .

On the other hand, in the optical disk drive, if the optical power adjustment mode is set again after the data recording operation is finished, the next test section (for example, Test Zone 2) in the PC area is accessed, and then arbitrary test data. Since a series of optical power adjustment operations of sequentially recording are repeatedly performed while variably increasing to an optical power value of 16 steps, a problem that takes a long time until the data recording operation is started occurs.

For example, the present invention performs an optical power adjustment (OPC) operation in a test zone allocated to a PCA area of a rewritable optical disc, and provides useful information related to the optical power adjustment operation. The present invention provides an apparatus and method for adjusting optical power of a rewritable optical disc to superimpose recording on the test section so that the useful information can be quickly read and used without an optical power adjusting operation.

An optical power adjustment method of a rewritable optical disc according to the present invention includes: a step of performing an optical power adjustment operation in a test zone allocated to a PCA area of a rewritable optical disc; And when the optical power adjustment operation is completed, the step of superimposing and recording useful information related to the optical power adjustment operation in the test section.

The useful information may include at least one of an optimum optical power adjustment value, identification information of the optical disc drive, a firmware version of the optical disc drive, and a temperature at the time of optical power adjustment.

When the optical power adjustment mode is set again, the method may further include reading out the useful information to determine validity and selectively omitting or performing the optical power adjustment operation according to the determination result. ,

The validity of the optical disc drive may be determined by whether the identification information of the optical disc drive read out as the useful information does not match the identification information actually given to the optical disc drive, or the firmware version of the optical disc drive read out as the useful information is the actual value of the optical disc drive. Characterized in that it is determined that it is not valid if it does not match the firmware version or the temperature read out as the useful information does not match the current detected temperature within an allowable range,

In the performing of the determination, if the determination result is not valid, the optical power adjustment operation is performed in the next test section, and the useful information is superimposed, and if the determination result is valid, without the optical power adjustment operation, A data recording operation is performed by applying the optimal optical power value read as the useful information.

In addition, an optical power adjusting apparatus for a rewritable optical disc according to the present invention includes: recording / reproducing means for recording or reproducing data on a rewritable optical disc; And control means for controlling an optical power adjustment operation and a data recording operation, wherein the control means is configured to adjust the optical power in a test zone allocated to a PCA area of the rewritable optical disc. When the optical power adjustment operation is completed, useful information related to the optical power adjustment operation is superimposed on the test section.

The useful information may include at least one of an optimum optical power adjustment value, identification information of the optical disc drive, a firmware version of the optical disc drive, and a temperature at the time of optical power adjustment.

In addition, the control means, if the optical power adjustment mode is set again, after reading the useful information to determine the validity, and optionally skip or perform the optical power adjustment operation according to the determination result ,

Further, the control means may be configured that the identification information of the optical disc drive read out as the useful information does not match the identification information actually given to the optical disc drive, or that the firmware version of the optical disc drive read out as the useful information is the actual size of the optical disc drive. Characterized in that it is determined that it is not valid if it does not match the firmware version or the temperature read out as the useful information does not match the current detected temperature within an allowable range,

Further, the control means, if it is not valid, perform the optical power adjustment operation in the next test section, and superimpose and record useful information, and if the determination result is valid, without the optical power adjustment operation, The data recording operation is performed by applying the optimum optical power value read as useful information.

The apparatus and method for adjusting optical power of a rewritable optical disc according to the present invention may perform, for example, an optical power adjustment (OPC) operation in a test zone allocated to a PCA area of a rewritable optical disc. Useful information related to the optical power adjustment, such as the optimal optical power adjustment value, the identification information of the optical disk drive, the firmware version of the optical disk drive, and the temperature at the time of optical power adjustment, is superimposed on the test section, and then the optical power adjustment is performed. When the mode is set again, the useful information can be read and the validity can be determined, and then the data recording operation can be performed more quickly by applying the optimal optical power value read as the useful information without the optical power adjusting operation. .

1 illustrates an embodiment of an optical power adjusting operation of a general optical disc drive.
2 shows a configuration of an embodiment of an optical disk drive to which the present invention is applied;
3 illustrates an embodiment in which useful information related to the optical power adjustment operation according to the present invention is superimposed and recorded in a test interval.
4 shows an operation flowchart of an embodiment of an optical power adjusting method of a rewritable optical disc according to the present invention;
5 illustrates an embodiment in which useful information related to the optical power adjustment operation according to the present invention is superimposed and recorded in the next test interval.

Best Mode for Carrying Out the Invention Preferred embodiments of an optical power adjusting apparatus and method for a rewritable optical disc according to the present invention will now be described in detail with reference to the accompanying drawings.

First, the apparatus and method for adjusting optical power of a rewritable optical disc according to the present invention are applied to various types of optical disc drives (ODD) used in connection with a host such as, for example, a personal computer (PC).

On the other hand, in the optical disk drive to which the present invention is applied, for example, as shown in Fig. 2, the optical disk 10, optical pickup 11, recording / reproducing section 12, digital signal processing section 13, interface The unit 14, the control unit 15, the servo unit 16, and the memory 17, etc. are included, and through the interface unit 14, a host 20 such as a personal computer (PC) is connected and connected. do.

In addition, when the arbitrary optical disc 10 is inserted into the drive, the controller 15 controls the servo unit 16 to operate the spindle servo operation to rotate the optical disc 10 at high speed, and A sled servo operation for moving the optical pickup 11 to the inner circumferential region of the optical disk is performed.

In addition, the control unit 15 performs a focus servo operation for detecting a focus error signal while raising the optical pickup 11 vertically toward the recording layer of the optical disc, and the track of the optical disc. A tracking servo operation that follows is performed.

In addition, a series of initial operations of reading disc information recorded in a lead-in area of the optical disc and storing the disc information in the memory 17 is performed. Then, a data recording operation is performed. Prior to this, an optical power adjustment (OPC) operation for calculating an optimal optical power value is performed.

For example, as shown in FIG. 3, when a rewritable DVD (DVD-RW) is inserted into a drive, the control unit 15 controls the optical pickup 11 and the recording / reproducing unit 12. Operation control to access a test section (e.g., Test Zone 1) assigned to the PCA area of the rewritable DVD-RW, and then adjust optical power at an arbitrary speed in the test section. OPC) operation.

In addition, by applying an optimal optical power value calculated through the optical power adjustment operation, a series of data recording operations for recording data are performed in the data area of the rewritable DVD.

On the other hand, when the optical power adjustment operation is completed as described above, the controller 15 overwrites useful information related to the optical power adjustment operation in the test section. The useful information may include information on an optical disc drive such as an optimal optical power value calculated by the optical power adjustment operation and a model number of the optical disc drive on which the optical power adjustment operation is performed. ID).

Further, the useful information includes a firmware version (Drive F / W Version) of the optical disk drive that has performed the optical power adjustment operation, a temperature at the time of the optical power adjustment, and the like. The temperature inside the optical pickup or the temperature around the optical pickup that is affected by the influence is detected, for example, by a temperature sensor (not shown) installed inside or around the optical pickup.

When the optical power adjustment mode is set again after the data recording operation is completed, the controller 15 reads useful information superimposed on the test section to determine validity, and then determines whether or not validity is determined. Accordingly, the data recording operation can be quickly performed by applying the optimum optical power value read as the useful information without the optical power adjusting operation, which will be described in detail below.

4 is a flowchart illustrating an embodiment of an optical power adjusting method of a rewritable optical disc according to the present invention. For example, an optical disc 10 such as a rewritable DVD (eg, DVD-RW) or the like may be used as an optical disc. When a data recording operation is requested in the inserted state in the drive, the controller 15 sets the optical power adjustment (OPC) mode (S10).

Then, the servo unit 16 and the optical pickup 11 are operated to search the PCA area of the rewritable DVD (RW-RW) (S11), and the optical power adjustment operation is performed previously. The last test zone (Test Zone) performed is searched (S12).

For example, as shown in FIG. 3, when the optical power adjustment (OPC) operation is finally performed in the first test zone (Test Zone 1) allocated to the PCA area, the first test interval is performed. It is determined whether or not useful information is recorded in the test section (S13).

When the determination result indicates that useful information is recorded in the first test section, for example, an optimum optical power value, identification information of the optical disk drive, a firmware version of the optical disk drive, and a temperature are recorded. In operation S14, the useful information is read.

In addition, the controller 15 determines whether or not the useful information is valid (S15). For example, the identification information (Drive ID) of the optical disk drive read as the useful information is actually stored in the optical disk drive. The firmware version (Drive F / W Version) of the optical disc drive that matches the identification information provided and read as the useful information matches the actual firmware version of the optical disc drive, and the temperature read as the useful information is If the detected temperature matches the allowable range, it is determined that the optimum optical power value read as the useful information is valid.

In addition, if it is determined that the useful information is valid (S16), the controller 15 quickly applies an optimal optical power value read as the useful information without performing a separate optical power adjustment operation. (S17).

On the other hand, in the control unit 15, even though test data that is null data is recorded in the first test zone 1 or useful information is recorded in the first test zone, the useful information is recorded. The identification information (Drive ID) of the optical disc drive read out as an ID does not match the identification information actually given to the optical disc drive, or the firmware version (Drive F / W Version) of the optical disc drive read out as the useful information is a value of the optical disc drive. If the actual firmware version does not match or the temperature read as the useful information does not match within the allowable range with the currently detected temperature, the second test section (Test Zone 2), which is the next test section, is searched for. do.

In the control unit 15, for example, as shown in FIG. 5, a series of optical power adjustments (OPC 2) for calculating an optimal optical power value while recording test data in the second test section. The operation is performed (S18).

In addition, when the optical power adjustment operation is completed, the control unit 15 may provide an optimal optical power value, identification information of the optical disc drive, firmware of the optical disc drive as useful information related to the optical power adjustment operation in the second test section. The version and temperature at the time of optical power adjustment are superimposed and recorded (S19).

After applying the optimum optical power value (S20), a series of data recording operations for recording audio and video data desired by a user are performed in the data area of the rewritable DVD (S21).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. , Alteration, substitution, addition, or the like.

10: optical disc 11: optical pickup
12: recording / reproducing section 13: digital signal processing section
14: interface unit 15: control unit
16: servo unit 17: memory
100: optical disk drive 200: host

Claims (10)

Performing an optical power adjustment operation in a test zone allocated to a PCA area of a rewritable optical disc; And
And when the optical power adjustment operation is completed, the step of superposing and recording useful information related to the optical power adjustment operation in the test section. The method of claim 1,
The useful information is at least one of an optimum optical power adjustment value, identification information of the optical disc drive, a firmware version of the optical disc drive, and a temperature at the time of optical power adjustment. The method of claim 1,
When the optical power adjustment mode is set again, the method may further include reading out the useful information to determine validity and selectively omitting or performing the optical power adjustment operation according to the determination result. How to adjust the optical power of a rewritable optical disc. The method of claim 3,
The validity or not is that the identification information of the optical disc drive read as the useful information does not match the identification information actually given to the optical disc drive,
The firmware version of the optical disc drive read out as the useful information does not match the actual firmware version of the optical disc drive,
And determining that the temperature read as the useful information is not valid if the temperature read out does not coincide with the currently detected temperature within an allowable range. The method of claim 3,
In the performing of the determination, if the result of the determination is not valid, the optical power adjustment operation is performed in the next test section, and then superimposed and recording useful information,
And, if valid, the data recording operation by applying the optimum optical power value read as the useful information without performing the optical power adjustment operation. Recording / reproducing means for recording or reproducing data on the rewritable optical disc; And
A control means for controlling the optical power adjusting operation and the data recording operation,
The control means may perform an optical power adjustment operation in a test zone allocated to a PCA area of the rewritable optical disc.
And when the optical power adjustment operation is completed, useful information related to the optical power adjustment operation is superimposed on the test section. The method of claim 6,
The useful information is at least one of an optimum optical power adjustment value, identification information of the optical disk drive, a firmware version of the optical disk drive, and a temperature at the time of optical power adjustment. The method of claim 6,
The control means reads out the useful information when the optical power adjustment mode is set again, determines whether it is valid, and selectively omits or performs the optical power adjustment operation according to the determination result. Optical power adjusting device for possible optical discs. The method of claim 8,
The control means may be that the identification information of the optical disc drive read out as the useful information does not match the identification information actually given to the optical disc drive,
The firmware version of the optical disc drive read out as the useful information does not match the actual firmware version of the optical disc drive,
And determining that the temperature read out as the useful information does not become valid if it does not coincide with the currently detected temperature within an acceptable range. The method of claim 8,
The control means, if it is not valid, perform the optical power adjustment operation in the next test section, and then superimpose and record useful information,
And, if valid, the data recording operation by applying the optimum optical power value read out as the useful information without performing the optical power adjustment operation.
KR1020100084553A 2010-08-31 2010-08-31 Apparatus and method for controlling laser power of rewritable optical disc KR20120020740A (en)

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KR1020100084553A KR20120020740A (en) 2010-08-31 2010-08-31 Apparatus and method for controlling laser power of rewritable optical disc

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KR1020100084553A KR20120020740A (en) 2010-08-31 2010-08-31 Apparatus and method for controlling laser power of rewritable optical disc

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