KR20120085985A - Apparatus and method for writing data in optical disc driver - Google Patents

Apparatus and method for writing data in optical disc driver Download PDF

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Publication number
KR20120085985A
KR20120085985A KR1020110007145A KR20110007145A KR20120085985A KR 20120085985 A KR20120085985 A KR 20120085985A KR 1020110007145 A KR1020110007145 A KR 1020110007145A KR 20110007145 A KR20110007145 A KR 20110007145A KR 20120085985 A KR20120085985 A KR 20120085985A
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KR
South Korea
Prior art keywords
servo
data recording
optical disc
focus
recording operation
Prior art date
Application number
KR1020110007145A
Other languages
Korean (ko)
Inventor
이완수
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 KR1020110007145A priority Critical patent/KR20120085985A/en
Publication of KR20120085985A publication Critical patent/KR20120085985A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/30—Monitoring
    • G06F11/32—Monitoring with visual or acoustical indication of the functioning of the machine
    • G06F11/324—Display of status information
    • G06F11/327—Alarm or error message display
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0938—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following servo format, e.g. guide tracks, pilot signals
    • 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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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE: A data recording device of an optical disk drive and a method thereof are provided to detect a servo deviation while performing focus and tracking servo operations, thereby variably controlling a data recording operation based on the servo difference. CONSTITUTION: A recording/reproducing unit records or reproduces data on an optical disk. A control unit(18) controls focus and tracking servo operations of an optical pickup. The control unit detects a servo difference while focus and tracking servo operations are performed in a specific area of the optical disk. The control unit variably controls a data recording operation based on the servo difference. The control unit searches the outmost perimeter area of a preset optical disk before a data recording operation.

Description

Apparatus and method for writing data in optical disc driver}

The present invention relates to a data recording apparatus and method in an optical disc drive (ODD) for recording or reproducing data on an optical disc such as, for example, a CD, a DVD, a DVD, or the like. It is about.

Generally, optical disc drives (ODDs) for recording or reproducing data are widely used in optical discs such as CDs, DVDs, BDs, and the like. It is connected and connected with various types of hosts such as a computer.

In the optical disc drive, when any one optical disc is inserted into the drive, disc information recorded in the lead-in area of the optical disc after performing a normal initial servo operation, as is well known, is disclosed. Will perform a series of disc recognition operations.

In addition, in the optical disk drive, when a write command is received from a host connected and connected through the interface, the optical disk drive performs an optical power control (OPC) or optimal power calibration (OPC) operation, and then the data of the optical disk. In the area, audio and video data in MPEG format is recorded.

In the optical disc drive, when a media ID (MID: Media ID) recorded on the optical disc is detected through the disc recognition process, the quality of the optical disc is predicted and determined based on the media ID. When the quality of the optical disc predicted and determined based on the media ID is good, the data recording operation is quickly performed by maintaining the data recording speed at a predetermined high speed.

On the other hand, if the quality of the optical disc predicted and determined based on the media ID is poor, the data recording speed is adjusted down to a low speed to perform a stable data recording operation.

However, recently, since a large amount of optical discs produced by unknown manufacturers are circulated in large quantities, there is a limit in predicting and determining the quality of optical discs based on the media ID.

In addition, since there are many deviations in focus and tracking servo operation toward the outer periphery of the optical disc, as described above, when the recording double speed is determined based on the media ID, data is recorded due to servo deviation or the like. There is a problem that the quality is degraded.

For example, before the data recording operation, the present invention searches for the outermost peripheral region of the optical disc, detects a servo deviation while performing a focus and tracking servo operation, and then based on the servo deviation. Accordingly, the present invention provides a data recording apparatus and method in an optical disc drive for variably controlling the data recording operation so as to prevent the data recording quality from deteriorating due to servo deviation or the like.

A data recording method in an optical disc drive according to the present invention includes a step of searching for a specific area of a preset optical disc before performing a data recording operation; Detecting a servo deviation while performing a focus and tracking servo operation in the specific region; And three steps of variably controlling the data recording operation based on the servo deviation,

In addition, the first step is characterized in that, before performing the data recording operation, to search the outermost peripheral region of the optical disk set in advance,

In the second step, the focus signal and the tracking signal may be detected while performing the focus and tracking servo operation in the outermost peripheral region, and the average value of the servo deviation may be calculated.

In the third step, when the average value of the servo deviation exceeds a preset reference value, a warning message is displayed and then a data recording operation is performed according to a recording method selected by a user. ,

The warning message may include a user selection menu item for designating that the recording operation is performed only in the servo stable area.

In addition, the data recording apparatus in the optical disk drive according to the present invention includes a recording / reproducing section for recording or reproducing data on the optical disk; And a controller for controlling the focus and tracking servo operation of the optical pickup, wherein the controller detects the servo deviation while performing the focus and tracking servo operation in a specific area of the optical disc, and then based on the servo deviation. Characterized in that the data recording operation is variably controlled,

The controller may search for the outermost peripheral region of the optical disk set in advance before performing a data recording operation.

The controller may be configured to calculate a mean value of the servo deviation by detecting a focus signal and a tracking signal while performing a focus and tracking servo operation in the outermost peripheral region.

The controller may be further configured to perform a data recording operation according to a recording method selected by the user after displaying a warning message when the average value of the servo deviation exceeds a preset reference value.

In the warning message, a user selection menu item for designating that the recording operation is performed only in the servo stable region is displayed.

The data recording apparatus and method in the optical disk drive according to the present invention, for example, before performing the data recording operation, the servo deviation while searching the outermost peripheral area of the optical disk and performing the focus and tracking servo operation (Servo Deviation) ), A warning message indicating a possibility of recording error occurrence is displayed on the basis of the servo deviation, and the recording operation is performed only in the servo stable area according to the recording method selected by the user, Degradation of the data recording quality can be prevented in advance, and in particular, even when the recording speed cannot be adjusted downward, the data recording operation can be stably performed.

1 shows a configuration of an embodiment of an optical disk drive to which the present invention is applied;
2 illustrates an embodiment of write strategy table information stored in an optical disk drive to which the present invention is applied.
3 shows an operation flowchart of an embodiment of a data recording method in an optical disc drive according to the present invention;
4 illustrates an embodiment of a process for detecting a servo deviation according to the present invention.
5 illustrates a graph of a focus signal and a tracking signal detected according to the present invention,
6 illustrates an embodiment of a warning message displayed according to the present invention.

Hereinafter, a preferred embodiment of a data recording apparatus and method in an optical disk drive according to the present invention will be described in detail with reference to the accompanying drawings.

First, the data recording apparatus and method according to the present invention, for example, to various types of optical disc drive (ODD) for recording or playing data on an optical disc such as CD (CD), DVD (DVD), BD (BD), etc. Apply.

On the other hand, in the optical disk drive (ODD) to which the present invention is applied, as shown in FIG. 1, for example, the optical disk 10, the optical pickup 11, the recording / reproducing unit 12, and the digital signal processing unit 13 ), The interface unit 14, the spindle motor 15, the sled motor 16, the motor driving unit 17, the control unit 18, the memory 19, and the like.

In addition, the interface unit 14 is connected to, for example, a host 200 such as a personal computer (PC) through an AT Attachment Packet Interface (ATAPI) method, and the memory 19 is an example. For example, a nonvolatile memory such as flash memory or EEPROM may be used.

The memory 19 stores and manages the write strategy table information necessary for the optical power adjustment (OPC) operation. For example, as shown in FIG. 2, the memory 19 includes an optical disc. The media ID, the maker code, and the write strategy information of the media ID may be linked and stored in the form of a look up table.

On the other hand, before performing the data recording operation, the controller 18 searches for a specific area of the optical disk, for example, the outermost peripheral area where the servo error occurs most, and then performs the focus and tracking servo operation. The servo deviation is detected, and a warning message indicating the possibility of a recording error is displayed based on the servo deviation.

In addition, the control unit 18 performs a recording operation only in the servo stable region of the optical disc in accordance with the recording method selected by the user, thereby preventing the data recording quality from being degraded due to the servo deviation. This will be described in detail below.

FIG. 3 shows an operation flowchart of an embodiment of a data recording method in an optical disc drive according to the present invention. For example, in the controller 18, when any one optical disc is inserted into the optical disc drive (S10). By operating the motor driver 17, the spindle motor 15 is rotated at a high speed, and a series of initial servo operations are performed to rotate the sled motor 16.

After the optical disk 10 is rotated at a high speed by the spindle motor 15 and the optical pickup 11 is moved to an inner circumferential specific region of the optical disk by the sled motor 16, The control unit 18 controls the optical pickup 11, the recording / reproducing unit 12, and the like to recognize a series of discs for retrieving disc information recorded in the lead-in area of the optical disc. The operation is performed (S11).

In addition, in the controller 18, when a write command is received from the host 200 connected and connected through the interface unit 14 (S12), a specific area of a preset optical disc, for example, As shown in Fig. 4, the outermost peripheral area of the optical disc is searched (S13).

In addition, after performing a write servo adjustment operation in the outermost peripheral region, a pre-scan operation for determining the quality of the optical disc is performed (S14). In operation 18, a recording speed (eg, 16 times speed) corresponding to the media ID is set by referring to the media ID (MID) found through the disc recognition process.

In addition, while performing the pre-scan at the recording double speed, a series of servo deviation detection operations for detecting a servo deviation by detecting a focus signal and a tracking signal are repeated N times (for example, N = 5). It is performed (S15).

For example, as shown in FIG. 5, the focus signal and the tracking signal have an unstable gradually increasing characteristic from the inner circumference region to the outer circumference region of the optical disc. After repeatedly detecting the tracking signal of 600 mV or more five times, the average value of the servo deviation corresponding thereto is calculated (S16).

Then, the control unit 18 compares and determines whether the calculated average value of the servo deviation exceeds a preset reference value (S17). For example, if the reference value does not exceed the reference value, the recording servo If it is determined as stable (S18), but exceeds the reference value, it is determined as recording servo instability (S19).

On the other hand, if it is determined through the above-described process that the recording servo is unstable, the control unit 18, for example, as shown in Figure 4, the position spaced a predetermined distance away from the outermost region of the optical disk to the inner peripheral region. After the secondary search, a write servo operation is performed to calculate the average value of the servo deviations.

In addition, even after the second search, if it is determined that the recording servo is unstable, after performing the third search for the position spaced a predetermined distance to the inner peripheral area of the optical disk, the recording servo operation is performed to calculate the average value of the servo deviation. If it is determined that the recording servo is stable after the third search, the control unit 18 controls the digital signal processing unit 14 and the like to guide and display a warning message (S20).

On the other hand, the warning message, for example, as shown in Figure 6, with a phrase indicating that the message is a servo deviation, a user selection menu item that can select whether or not to perform a limited recording operation in the stable area only; Can be displayed.

In addition, the controller 18 checks the recording method selected by the user (S21), and performs a normal optical power adjustment operation, and performs a data recording operation suitable for the recording method (S22).

For example, when a user-selected menu item specifying recording to be limited to the stable area is selected, the control unit 18 stores only data from the inner circumferential area of the optical disc to the recording position determined as the stable area by the third search. Since the recording operation is limited, it is possible to prevent the data recording quality from deteriorating due to the servo deviation, etc., and in particular, the data recording operation can be stably performed even when the recording speed cannot be adjusted downward. Will be.

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.

10: optical disc 11: optical pickup
12: recording / reproducing section 13: digital signal processing section
14: interface 15: spindle motor
16: sled motor 17: motor drive unit
18: control unit 19: memory
100: optical disk drive 200: host

Claims (10)

Before performing a data recording operation, step 1 of searching for a specific area of a preset optical disc;
Detecting a servo deviation while performing a focus and tracking servo operation in the specific region; And
And three steps of variably controlling a data recording operation based on the servo deviation. The method of claim 1,
In the step 1, before the data recording operation is performed, a data recording method of the optical disc drive, characterized in that for searching the outermost peripheral region of the previously set optical disc. The method of claim 2,
Wherein said step 2 detects a focus signal and a tracking signal while performing a focus and tracking servo operation in said outermost peripheral region, and calculates an average value of the servo deviation. The method of claim 3, wherein
In the third step, when the average value of the servo deviation exceeds a preset reference value, a warning message is displayed and then a data recording operation is performed according to a recording method selected by a user. Data recording method in. The method of claim 4, wherein
The warning message includes a user selection menu item for specifying to perform a recording operation only in the servo stable area. A recording / reproducing section for recording or reproducing data on the optical disc; And
It is configured to include a control unit for controlling the focus and tracking servo operation of the optical pickup,
The control unit detects a servo deviation while performing a focus and tracking servo operation in a specific region of the optical disc, and then variably controls the data recording operation based on the servo deviation. . The method according to claim 6,
The control unit searches for the outermost peripheral region of a previously set optical disc before performing a data recording operation. 8. The method of claim 7,
And the control unit detects a focus signal and a tracking signal and calculates an average value of the servo deviation while performing the focus and tracking servo operation in the outermost peripheral region. The method of claim 8,
In the optical disc drive, if the average value of the servo deviation exceeds a preset reference value, the controller displays a warning message and performs a data recording operation according to a recording method selected by a user. Data recording apparatus. The method of claim 9,
The warning message includes a user selection menu item for specifying to perform a recording operation only in the servo stable area.
KR1020110007145A 2011-01-25 2011-01-25 Apparatus and method for writing data in optical disc driver KR20120085985A (en)

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Application Number Priority Date Filing Date Title
KR1020110007145A KR20120085985A (en) 2011-01-25 2011-01-25 Apparatus and method for writing data in optical disc driver

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KR20120085985A true KR20120085985A (en) 2012-08-02

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