KR20130024269A - Optimum power calibration apparatus and method for rewritable optical disc - Google Patents

Optimum power calibration apparatus and method for rewritable optical disc Download PDF

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Publication number
KR20130024269A
KR20130024269A KR1020110087605A KR20110087605A KR20130024269A KR 20130024269 A KR20130024269 A KR 20130024269A KR 1020110087605 A KR1020110087605 A KR 1020110087605A KR 20110087605 A KR20110087605 A KR 20110087605A KR 20130024269 A KR20130024269 A KR 20130024269A
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KR
South Korea
Prior art keywords
dvd
disc
power calculation
area
ram
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KR1020110087605A
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Korean (ko)
Inventor
권승호
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주식회사 히타치엘지 데이터 스토리지 코리아
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Priority to KR1020110087605A priority Critical patent/KR20130024269A/en
Publication of KR20130024269A publication Critical patent/KR20130024269A/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G11B19/122—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of an identification or authentication mark
    • 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
    • G11B7/1263—Power control during transducing, e.g. by monitoring
    • 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
    • G11B7/28—Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B2020/10851—Erasing data on the record carrier
    • 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
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
    • G11B2220/2575—DVD-RAMs

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

An apparatus and method for calculating an optimum power of a rewritable optical disc according to the present invention may be, for example, whether a rewritable optical disc (eg, DVD-RAM, DVR-RW) is a blank disc or used disc. If the disk is blank, the data is deleted by N tracks in the test area, and then the optimum power calculation (OPC) operation is performed. If the disk is used, the previous optimal power calculation value and the write strategy (WS) are performed. By applying N tracks in the test area and then performing the optimum power calculation operation, the optimum power calculation operation can be performed for blank discs with no data recorded and used discs with data recorded therein. It becomes possible.

Description

Optimum power calibration apparatus and method for rewritable optical disc

The present invention relates to an optimum power calculating device and method applied to various types of optical disc drives (ODDs) for recording or reproducing data on a rewritable optical disc, for example.

In general, an optical disc drive (ODD) for recording or playing data on a rewritable optical disc such as a random access memory (DVD-RAM) or a DVD-RW (Rewritable) is widely used, and the optical disc drive (ODD) may be, for example, For example, the connection may be used through an interface with various types of hosts such as a personal computer (PC).

On the other hand, in the optical disc drive, for example, when data is recorded on a rewritable DVD such as a DVD-RAM or a DVD-RW, an optimal power calibration (OPC) operation is performed.

For example, when performing an optimal power calculation (OPC) operation in a state where a DVD-RAM is inserted into an optical disc drive, as is widely known, it is allocated to a lead-in area of a DVD-RAM. Access the Drive Test Zone.

Then, the N tracks (eg, N = 3) in the drive test zone are irradiated with a predetermined erase power to erase all data, and then the test data is recorded in a predetermined unit (eg, 16 sectors). And a series of optimum power calculation operations for calculating the optimum power having the best recording quality.

That is, when the rewritable optical disc is, for example, a blank disc in which no data is recorded in the data area, the data is erased in the test area of the drive test zone as described above. It is appropriate to perform an optimal power calculation operation.

However, when the rewritable optical disc is a used disc in which data is recorded in the data area, the optimum power calculation operation is performed in a state where all data is deleted in the test area of the drive test zone as described above. It is inappropriate to do.

That is, when the data recording operation is performed by applying the optimum power value calculated in the test area in which all the data is deleted to the data area in which the data is recorded, there is a problem that the data recording quality is deteriorated.

According to the present invention, for example, if a rewritable optical disc is a blank disc, an optimal power calculation operation is performed after deleting data in the test area, and if the rewritable optical disc is a blank disc, the data is stored in the test area. The present invention provides an apparatus and method for calculating an optimum power of a rewritable optical disc for performing an optimum power calculation operation after recording, so that an optimum power calculation operation suitable for the blank disk and the used disk can be performed.

The method for calculating an optimal power of a rewritable optical disc according to the present invention comprises the steps of: determining whether the rewritable optical disc is a blank disc or a used disc; And, if the disc is used as a result of the determination, recording the data in the test area and performing an optimal power calculation operation.

If the rewritable optical disc is a DVD-RAM, the step 1 checks the disc identification information recorded in the disc identification zone in the lead-in area of the DVD-RAM to determine whether it is a blank disc or a used disc. Characterized in that,

In the second step, the read-in of the DVD-RAM is applied to a disc identification zone in the lead-in area of the DVD-RAM by applying the previous optimum power calculation value and the write strategy information recorded by the drive description. In the drive test zone within the region, the data is recorded as many as N tracks, and then an optimum power calculation operation is performed.

Further, if the DVD-RAM is a blank disc as a result of the determination, the method further includes the step of performing an optimal power calculation operation after deleting data by N tracks in the drive test zone in the lead-in area of the DVD-RAM. Characterized in that,

If the rewritable optical disc is a DVD-RW, the first step is to check RMD information in the RMA area of the DVD-RW to determine whether it is a blank disc or a used disc.

In the second step, the PCA of the DVD-RW is applied to the RMD information in the RMA area of the DVD-RW by applying the previous optimum power calculation value and the write strategy information recorded as the optimum power calculation related information. In the region, the data is recorded by N tracks, and then an optimal power calculation operation is performed.

In addition, if the DVD-RW is a blank disc as a result of the determination, further comprising the step of performing an optimal power calculation operation after deleting data by N tracks in the PCA region of the DVD-RW,

The apparatus for calculating an optimum power of a rewritable optical disc according to the present invention may include an optical pickup, a recording / reproducing unit, and a control unit, wherein the control unit includes data in a test area if the rewritable optical disc is used. After the recording, characterized in that to perform the optimum power calculation operation,

If the rewritable optical disc is a DVD-RAM, the controller checks the disc identification information recorded in the disc identification zone in the lead-in area of the DVD-RAM to determine whether it is a blank disc or a used disc. Characterized in that,

Further, the control unit applies a previous optimum power calculation value and write strategy information recorded in the drive description to the disc identification zone in the lead-in area of the DVD-RAM, thereby leading to the lead-in area of the DVD-RAM. In the drive test zone therein, after recording data as many as N tracks, the optimum power calculation operation is performed.

The control unit may perform an optimal power calculation operation after deleting the data by N tracks in the drive test zone in the lead-in area of the DVD-RAM, if the DVD-RAM is a blank disk. ,

If the rewritable optical disc is a DVD-RW, the controller checks the RMD information in the RMA area of the DVD-RW to determine whether it is a blank disc or a used disc.

In addition, the control unit applies the previous optimal power calculation value and the write strategy information recorded as the optimal power calculation related information to the RMD information in the RMA area of the DVD-RW, and thereby the PCA area of the DVD-RW. After the data is recorded by N tracks, the optimum power calculation operation is performed.

The controller may determine that the DVD-RW is a blank disc, and then perform an optimal power calculation operation after deleting data by N tracks in the PCA region of the DVD-RW.

An apparatus and method for calculating an optimum power of a rewritable optical disc according to the present invention may be, for example, whether a rewritable optical disc (eg, DVD-RAM, DVR-RW) is a blank disc or used disc. If the disk is blank, the data is deleted by N tracks in the test area, and then the optimum power calculation (OPC) operation is performed. If the disk is used, the previous optimal power calculation value and the light strategy By applying N tracks in the test area and then performing the optimum power calculation operation, the optimum power calculation operation can be performed for blank discs with no data recorded and used discs with data recorded therein. It becomes possible.

1 shows a configuration of an embodiment of an optical disk drive to which the present invention is applied;
2 to 4 show a disk and a data structure for a DVD-RAM to which the present invention is applied;
5 is a flowchart illustrating an embodiment of a method for calculating an optimum power of a rewritable optical disc according to the present invention;
6 to 8 show a disc and a data structure for a DVD-RW to which the present invention is applied.

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

First, an apparatus and method for calculating an optimal power of a rewritable optical disc according to the present invention include, for example, an optical disc drive (ODD) used for connection through an interface with various types of hosts such as a personal computer (PC). ) May be applied.

On the other hand, the optical disk drive (ODD), for example, as shown in Figure 1, the optical pickup 11, the sled motor 12, the spindle motor 13, the motor drive unit 14, recording / reproduction The unit 15, the digital signal processing unit 16, the control unit 17, the memory 18, and the interface unit 19 are configured to be included.

The control unit 17 also records data for recording or reproducing data on the optical disc 10 through an interface with a host 200 such as a personal computer (PC) or the like connected through the interface unit 19; The regeneration operation is performed, and the control unit 17 preferentially performs an optimum power calculation (OPC) operation prior to performing the data recording and reproducing operation.

On the other hand, as shown in FIG. 2, the DVD-RAM, which is a rewritable optical disc, is divided into a lead-in area, a user data area, and a lead-out area. In addition, it may be further divided into an embossed data zone, a mirror zone, and a rewritable data zone.

A drive test zone, a disc identification zone, and the like are allocated to the lead-in area and the lead-out area, and the drive test zone is configured to perform an OPC operation. It is used as a test area for recording and reproducing predetermined test data.

Meanwhile, in the disc identification zone, an optimal power calculation result (OPC Result) and write strategy information previously performed are recorded. For example, as shown in FIG. In the identification zone, first to fourth disc identification information (Disc identification information 1,2,3,4), first and second drive information (Drive information 1,2) having 16 sector sizes, respectively, and first and Second spare areas Reserved 1,2 are allocated.

In the disc identification information, identification information for indicating whether the DVD-RAM is a blank disc or a used disc is recorded. That is, the user data of the DVD-RAM is recorded. If no data is recorded in the area, identification information to indicate that it is a blank disc is recorded. If data is recorded in the user data area, identification information to indicate that it is a used disc is recorded. do.

In addition, 16 drive descriptions (Drive description 0 to 15) each having a size of 2048 bytes are recorded in the first and second drive information (Drive Information 1,2). As shown in Fig. 4, the drive manufacturer's name, additional information, and drive condition are recorded in each drive description.

In the drive condition, as shown in FIG. 4, the previously performed optimum power calculation result value (OPC Result) and write strategy information are recorded. The result value and the write strategy information are well-known techniques already defined in the DVD-RM standard, and thus detailed technical description thereof will be omitted.

On the other hand, the controller 17 checks the disc identification information to determine whether the DVD-RAM inserted into the optical disc drive is a blank disc or a used disc. After the data is deleted, the optimal power calculation operation is performed, and if the disk is used, the optimal power calculation operation is performed after the data is recorded in the test area of the drive test zone.

Fig. 5 shows an operation flowchart of an embodiment of the method for calculating the optimum power of a rewritable optical disc according to the present invention. For example, the optimum power calculation is performed in the state where the DVD-RAM 10, which is a rewritable optical disc, is inserted. When the (OPC) mode is set (S10), the control unit 17 controls the optical pickup 11, the motor driving unit 14, the recording / reproducing unit 15, and the like, as shown in FIG. As described above, the disc identification zone allocated to the lead-in area of the DVD-RAM is accessed (S11).

As shown in Fig. 3, the control unit 17 checks the disc identification information recorded in the disc identification zone to determine whether the DVD-RAM is a blank disc or not. It is determined whether it is a used disc (S13).

On the other hand, as a result of the determination, when the DVD-RAM 10 is a used disc, the control unit 17, as shown in Fig. 4, the drive condition (Drive description) in the drive description (Drive description) The previous optimum power calculation (OPC) result value and the light strategy (WS) information recorded as the drive condition information are checked (S15).

In addition, the controller 17 applies the checked previous optimum power calculation (OPC) result value and the write strategy (WS) information to apply a drive test zone allocated to the lead-in area of the DVD-RAM. In the (Drive test zone) area, test data is recorded by N tracks (for example, N = 3) (S16).

That is, the user data area in which data is recorded and the test area of the drive test zone in which the optimal power calculation operation is to be performed are made to be in the same state.

On the other hand, as a result of the determination, when the DVD-RAM 10 is a blank disc, the controller 17 drives a drive test zone assigned to the lead-in area of the DVD-RAM. The area is erased by irradiating erase power by N tracks (for example, N = 3) (S17).

That is, after the user data area in which no data is recorded and the test area of the drive test zone in which the optimal power calculation operation is to be performed are made to be in the same state, the optimal power calculation operation is performed (S18).

When the optimum power calculation operation as described above is completed (S19), the optimum power calculation mode is released, and then the data recording operation is performed (S20), so that the optimum power calculation operation suitable for the blank disk and the used disk is performed. Will be able to perform

On the other hand, the present invention can be applied not only to a DVD-RAM but also to a DVD-RW. For example, the DVD-RW is shown in front of a lead-in zone as shown in FIG. The PCA (Power Calibration Area) area and the RMA (Recording Management Area) area are allocated.

In the PCA area, test data is recorded to perform an OPC operation, and information related to an optimum power calculation value is recorded in the RMA area.

For example, as illustrated in FIG. 7, optimal power calculation related information (OPC related information) is recorded in field 1 (Field 1) of DMD (Recording Management Data) recorded in the RMA area.

As shown in FIG. 8, as the optimum power calculation related information, field 1 of the RMD includes a drive manufacture ID, a serial number, a model number, and a first field. 1st field of Write Strategy code, Recording power, Time stamp, Power calibration address, Running OPC information, Second field 2nd field of Write Strategy code is recorded, which is a well-known technique already defined in the DVD-RW standard, and thus a detailed description thereof will be omitted.

On the other hand, the controller 19 accesses the field 1 of the RMD recorded in the RMA area when performing the OPC operation in the state where the DVD-RW is inserted in the optical disc drive. Then, it is checked whether information related to optimal power calculation is recorded, and it is determined whether the DVD-RW is a blank disk or a used disk.

For example, if the optimal power calculation related information is recorded in the field 1 of the RMD, it is determined that the DVD-RW is a used disc, and it is determined in the field 1 of the RMD. If the information related to the optimum power calculation is not recorded, the DVD-RW is determined as a blank disc.

When the DVD-RW is a disc used as a result of the determination, the controller 17 applies the optimal power value and the write strategy recorded in the field 1 of the RMD to apply the PCA of the DVD-RW. Test data is recorded in the area by N tracks (eg N = 3).

That is, the user data area in which data is recorded and the PCA area in which the optimal power calculation operation is to be performed are made to be in the same state.

On the other hand, as a result of the determination, when the DVD-RW is a blank disk, the controller 17 irradiates the erase power (Erase Power) by N tracks (for example, N = 3) to the PCA area of the DVD-RW. Will be deleted.

That is, since the data area in which no data is recorded and the PCA area in which the optimal power calculation operation is to be performed later become the same state, the optimal power calculation operation is performed. It is possible to perform an optimum power calculation operation suitable for each disk.

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.

100: optical disk drive 200: host
10: optical disc 11: optical pickup
12: sled motor 13: spindle motor
14: motor drive unit 15: recording / playback unit
16 digital signal processor 17 control unit
18: memory 19,20: interface unit

Claims (14)

Determining whether the rewritable optical disc is a blank disc or a used disc; And
And if the disc is used as a result of the determination, recording the data in the test area and then performing an optimum power calculation operation. The method of claim 1,
If the rewritable optical disc is a DVD-RAM,
In the step 1, the disc identification information recorded in the disc identification zone in the lead-in area of the DVD-RAM is checked to determine whether the disc is a blank disc or a used disc. . The method of claim 2,
In the second step, the previous optimum power calculation value and the write strategy information recorded by the drive description are applied to the disc identification zone in the lead-in area of the DVD-RAM, and thus, in the lead-in area of the DVD-RAM. An optimal power calculation method for a rewritable optical disc, characterized in that an optimum power calculation operation is performed after recording data by N tracks in a drive test zone. The method of claim 2,
And, if the DVD-RAM is a blank disc, performing the optimum power calculation operation after deleting data by N tracks in the drive test zone in the lead-in area of the DVD-RAM. Optimal power calculation method for a rewritable optical disc. The method of claim 1,
If the rewritable optical disc is a DVD-RW,
In the step 1, the RMD information in the RMA area of the DVD-RW is checked to determine whether the disk is a blank disk or a used disk. 6. The method of claim 5,
Step 2 is applied to the RMD information in the RMA area of the DVD-RW to the PCA area of the DVD-RW by applying the previous optimal power calculation value and the write strategy information recorded as the optimum power calculation related information. And calculating the optimum power of the rewritable optical disc after recording data as many as N tracks. 6. The method of claim 5,
And, if the DVD-RW is a blank disk, further comprising the step of deleting the data by the number of N tracks in the PCA area of the DVD-RW, and then performing an optimal power calculation operation. Method of calculating the optimal power. Including an optical pickup, a recording / reproducing unit, and a control unit,
And, if the rewritable optical disc is used, recording of data in a test area and then performing an optimum power calculation operation. The method of claim 8,
If the rewritable optical disc is a DVD-RAM,
And the control unit checks the disc identification information recorded in the disc identification zone in the lead-in area of the DVD-RAM, and determines whether the disc is a blank disc or a used disc. The method of claim 9,
The control unit applies a previous optimal power calculation value and write strategy information recorded in the drive description to the disc identification zone in the lead-in area of the DVD-RAM, and drives the drive in the lead-in area of the DVD-RAM. An apparatus for calculating an optimum power of a rewritable optical disc, characterized in that an optimum power calculation operation is performed after recording data by N tracks in a test zone. The method of claim 9,
The control unit, when the DVD-RAM is a blank disc, determines that the data is deleted by N tracks in the drive test zone in the lead-in area of the DVD-RAM, and then the optimum power calculation operation is performed. Optimum power calculation device for rewritable optical discs. The method of claim 8,
If the rewritable optical disc is a DVD-RW,
And the controller checks the RMD information in the RMA area of the DVD-RW to determine whether it is a blank disc or a used disc. 13. The method of claim 12,
The control unit applies the previous optimal power calculation value and the write strategy information recorded as the optimal power calculation related information to the RMD information in the RMA area of the DVD-RW, and applies it to the PCA area of the DVD-RW. And an optimum power calculation operation after recording data as many as N tracks. 13. The method of claim 12,
If the DVD-RW is a blank disc, the controller performs an optimal power calculation operation after deleting data by N tracks in the PCA region of the DVD-RW. Power calculation device.
KR1020110087605A 2011-08-31 2011-08-31 Optimum power calibration apparatus and method for rewritable optical disc KR20130024269A (en)

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KR1020110087605A KR20130024269A (en) 2011-08-31 2011-08-31 Optimum power calibration apparatus and method for rewritable optical disc

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