CN1312671C - Method for high-multiplier speed recording power error compensation - Google Patents

Method for high-multiplier speed recording power error compensation Download PDF

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Publication number
CN1312671C
CN1312671C CNB031507433A CN03150743A CN1312671C CN 1312671 C CN1312671 C CN 1312671C CN B031507433 A CNB031507433 A CN B031507433A CN 03150743 A CN03150743 A CN 03150743A CN 1312671 C CN1312671 C CN 1312671C
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power
speed
recording power
recording
mentioned
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CN1591602A (en
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吴宗炫
闵丙薰
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Shanghai LG Electronics Co Ltd
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Shanghai LG Electronics Co Ltd
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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
    • G11B7/12—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

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

Abstract

The present invention relates to a method for high-multiplier speed recording power error compensation. The method comprises the following stages: first, calculating the ratio between high-multiplier speed reference recording power and maximal low-multiplier speed reference recording power which are preset in a off-line state and maximal low-multiplier speed reference recording power obtained by executing OPC in an actual PCA area so as to estimate high-multiplier speed power; second, reflecting low-multiplier speed reference recording power lower than the maximal low-multiplier speed and the reference recording power obtained by executing the OPC in the actual PCA area so as to compensate the error of the recording power. According to the method for the high-multiplier speed recording power error compensation of the present invention, an error generated according to the estimated recording power value is calculated to compensate an error in setting the high-multiplier speed recording power when a high-multiplier speed optical recording player is set.

Description

The compensation method of high power speed recording power error
(1) technical field
The present invention relates to the compensation method of a kind of high power speed recording power error, be meant especially when high power speed optical record-play device setting recording power, according to the recording powers of laser beam that predicts, calculate the error that produces, thus can compensating error when setting high power speed recording power.
(2) background technology
Be defined as follows at the orange paper (Orange book) of record with the CD specification, be convenient to find the disc area of optimal recording power, best power control (Optimum Power Control:OPC) zone is the power calibration area (Power Calibration Area:PCA) that read zone (read) inboard of above-mentioned record with CD.
In the past, in order to set the recording power of CD-R/RW, the PCA zone in the interior week on CD was by the optimal power of best power control (hereinafter to be referred as OPC) process setting.
But along with doubly high-speedization of speed of nearest CD-RW driver (Drive) with CD-R, the former OPC that is applied to the PCA zone of above-mentioned low power speed recording power carries out, and is no longer suitable.
Then, the setting of high power speed recording power is not carried out actual OPC, the setting recording power with prediction.But recording power and actual best power have error to take place as constituted above.
Fig. 1 is the process flow diagram according to the high power speed recording power error compensation method of prior art.As shown in the figure, at first calculate the ratio R 1 (S101) of fast reference recording power of the high power that is predetermined in off-line state (off-line) and low power speed reference recording power.At this, in the value that above-mentioned off-line state (off-line) is predetermined, be meant the value that when experiment, draws, be reflection light picker (P/U) characteristic, the error of IC, the value that tool draws with the deviation between the CD of brand coding.
And then, in the PCA zone of actual light recording and reproducing apparatus, carry out OPC, setting recording power P1 (S102) with low power speed.This is because the recording power of the above-mentioned gained recording power during with physical record is different, thereby carries out with physical record.
Thereafter, calculate the ratio R 1 and the above-mentioned OPC recording power P1 that carries out with low power speed of fast reference recording power of above-mentioned high power and low power speed reference recording power, predicting will be at the high power speed recording power (S103) of actual light recording and reproducing apparatus execution.At this, owing to can not carry out OPC with above-mentioned high power speed, thereby with reference to the above-mentioned low power speed reference recording power of gained and the ratio of real power, prediction high power speed recording power.
But, the recording power that prediction is set according to said method, being certain to has error with best physical record power, thus the problem of the record quality that makes a difference.
(3) summary of the invention
The present invention creates out in order to improve the problems referred to above, its objective is provides the compensation method of a kind of high power speed recording power error, can be when the high power speed optical record-play device setting recording power by this method, recording powers of laser beam according to prediction, calculate the error of generation, making can compensating error when setting high power speed recording power.
In order to achieve the above object, according to high power speed recording power error of the present invention compensation method, be characterized in comprising with the next stage:
Phase one, calculate in advance prior to the high power speed reference recording power of off-line state setting and the ratio between the maximum low power speed reference recording power, and in actual PCA zone, carry out OPC and the maximum low power speed reference recording power that obtains, thereby prediction high power speed power comprises: (1) draws predefined high power speed reference recording power and ratio R 1 at the maximum low power speed of off-line state reference recording power in off-line state, the value that above-mentioned off-line state is predetermined, be meant the value that when experiment, draws, above-mentioned maximum low power speed reference recording power is set the doubly speed at the OPC of the actual execution of high power speed optical record-play device for; (2), carry out OPC and setting recording power P1 with maximum low power speed in the PCA zone of actual light recording and reproducing apparatus; (3) (3) calculate above-mentioned R1 and P1, will be at the high power speed recording performance number P of actual light recording and reproducing apparatus execution thereby dope High_speed, that is, and P High_speed=R1 * P1;
Subordinate phase, the error of compensation recording power, comprise: (1) once more, the predefined maximum low power speed reference recording power that in above-mentioned stage off-line state, draws and the ratio R 2 of other low powers speed reference power, above-mentioned other low power speed are meant than low doubly fast of above-mentioned maximum low power speed; (2) then, in actual light recording and reproducing apparatus PCA zone, carry out OPC and setting recording power P2 with other low power speed; (3) next calculates the ratio R 3 between recording power P1 that draws with above-mentioned maximum low power speed execution OPC and the recording power P2 that draws with the OPC of above-mentioned other low powers speed execution; (4) last, according to the value that above-mentioned each stage draws, try to achieve high power speed recording power error offset P Enhanced_High_speed, that is, and P Enhaced_High_speedBe calculated as follows:
P Enhanced_?High_speed＝P1×R1+α×(R3-R2)
Wherein: α is the doubly fast factor.
The compensation method of aforesaid high power speed recording power error, be characterized in from carrying out above-mentioned the highest low power speed OPC recording power with carrying out above-mentioned other low powers speed OPC the ratio of recording power, deduct the value of ratio of the reference recording power of the maximum low power speed reference recording power set in above-mentioned off-line working and maximum low power speed, this value that calculates with the OPC recording power of carrying out above-mentioned maximum low power speed on duty, with its value compensation recording power error.
According to the compensation method of aforesaid high power speed recording power error of the present invention, when setting high power speed optical record-play device, calculate the error that the recording powers of laser beam according to prediction produces, thus can compensating error when setting high power speed recording power.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Fig. 1 is the process flow diagram according to the high power speed recording power error compensation method of prior art.
Fig. 2 is the process flow diagram according to the high power speed recording power error compensation method of the specific embodiment of the invention.
Fig. 3 is the synoptic diagram that recording power error compensating method according to the present invention shows the size ratio that compensates recording powers of laser beam.
(5) embodiment
Fig. 2 is the process flow diagram according to the high power speed recording power error compensation method of the specific embodiment of the invention.As shown in the figure, draw predefined high power speed reference recording power and ratio R 1 (S201) in off-line state (off-line) at the maximum low power speed of off-line state (off-line) reference recording power.
At this, in the value that above-mentioned off-line state (off-line) is predetermined, be meant the value that when experiment, draws, be reflection light picker (P/U) characteristic, the error of IC, the value that tool draws with deviation between the CD of brand coding.In addition, above-mentioned maximum low power speed reference recording power, set doubly speed at the OPC of the actual execution of high power speed optical record-play device.
Then, in the PCA zone of actual light recording and reproducing apparatus, carry out OPC and setting recording power P1 (S202) with maximum low power speed.
Secondly, calculate above-mentioned off-line state draw predefined high power speed reference recording power with at the ratio (Power_Ratio: be made as R1) of the maximum low power speed of off-line state reference recording power and the OPC recording power (P that carries out with above-mentioned maximum low power speed Low_speed: be made as P1), will be thereby dope in the high power speed recording power P of actual light recording and reproducing apparatus execution High_speed(S203).Wherein, because above-mentioned Power_Ratio is made as R1, P Low_speedBe made as P1, so high power speed recording power P High_speedBe calculated as follows: P High_speed=P Low_speed* Power_Ratio=R1 * P1.
The ratio R 2 (S204) of the predefined maximum low power speed reference recording power that once more, in above-mentioned stage S201 off-line state (off-line), draws and other low powers speed reference power.At this, above-mentioned maximum low power speed refers to: the maximum low power speed of OPC that can carry out in high power speed optical record-play device, above-mentioned other low power speed are meant than the low doubly speed of above-mentioned maximum low power speed.
For example, times speed of high power of the present invention speed optical record-play device is if X24, and so above-mentioned maximum low power speed is exactly X16, and other low power speed are exactly X12.
Then, in actual light recording and reproducing apparatus PCA zone, carry out OPC and setting recording power P2 (S205) with other low power speed.At this, with same doubly speed carry out above-mentioned actual OPC and the recording power that draws with can the generation error between the recording power that off-line state draws, this is not only because the optical disk property difference that produces between each optical disc production merchant, also because the difference of the usage that produces between the manufacturer of the optical record-play device of the fast video disc recording data that make progress and production error different cause.
Next calculates the ratio R 3 (S206) between recording power P1 that draws with above-mentioned maximum low power speed execution OPC and the recording power P2 that draws with the OPC of above-mentioned other low powers speed execution.
At last, according to the value of drawing in above-mentioned each stage, try to achieve high power speed recording power error offset P Enhanced_High_speed(S207).Wherein, high power speed recording power error offset P Enhanced_High_speedBe calculated as follows:
P Enhanced_High_speed＝P Low_speed*Power_Ratio+α*Δ
Δ＝C_Power_Ratio-LS_Power_Ratio
The a here is the doubly fast factor (Speed Factor), C_Power_Ratio carries out actual OPC and the power ratio (Power_Ratio of the low power speed that calculates, be above-mentioned R3), LS_Power_Ratio is the average low power speed power ratio of measuring in off-line state (Power_ Ratio, promptly above-mentioned R2).
That is P, Enhanced_High_speed=P1 * R1+ α * (R3-R2)
Fig. 3 is the synoptic diagram that recording power error compensating method according to the present invention shows the size ratio that compensates recording powers of laser beam.As shown in the figure, recording power is because compensating error, thereby can set only value.
In addition, in said process, can reflect (be exemplified as X16, the X12) ratio between maximum low power speed and the low power speed, at this, can also reflect lower low power speed (X8, the X4) ratio between, thereby can compensating error.
As mentioned above, according to high power speed recording power error of the present invention compensation method, when high power speed optical record-play device setting recording power, recording powers of laser beam according to prediction, calculate the error of generation, thereby when setting high power speed recording power, can compensating error.
Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense, so be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the distortion of the above embodiment.

Claims (2)

1. high power speed recording power error compensation method is characterized in that comprising with the next stage:
Phase one, calculate in advance at the high power speed reference recording power of off-line state setting and the ratio between the maximum low power speed reference recording power, and in the real power calibration region, carry out best power control and the maximum low power speed reference recording power that obtains, thereby prediction high power speed power comprises:
(1) draws predefined high power speed reference recording power and ratio R 1 in off-line state at the maximum low power speed of off-line state reference recording power, the value that above-mentioned off-line state is predetermined, be meant the value that when experiment, draws, above-mentioned maximum low power speed reference recording power is set the doubly speed at the OPC of the actual execution of high power speed optical record-play device for;
(2), carry out OPC and setting recording power P1 with maximum low power speed in the PCA zone of actual light recording and reproducing apparatus;
(3) calculate above-mentioned R1 and P1, will be thereby dope at the high power speed recording performance number P of actual light recording and reproducing apparatus execution High_speed, that is, and P High_speed=R1 * P1;
Subordinate phase, the error of compensation recording power comprises:
(1) once more, the ratio R 2 of the predefined maximum low power speed reference recording power that draws in above-mentioned stage off-line state and other low powers speed reference power, above-mentioned other low power speed are meant than the low doubly speed of above-mentioned maximum low power speed;
(2) then, in actual light recording and reproducing apparatus PCA zone, carry out OPC and setting recording power P2 with other low power speed;
(3) next calculates the ratio R 3 between recording power P1 that draws with above-mentioned maximum low power speed execution OPC and the recording power P2 that draws with the OPC of above-mentioned other low powers speed execution;
(4) last, according to the value that above-mentioned each stage draws, try to achieve high power speed recording power error offset P Enhanced_High_speed, that is, and P Enhanced_High_speedBe calculated as follows:
P Enhanced_High_speed＝P1×R1+α×(R3-R2)
Wherein: α is the doubly fast factor.
2. high power speed recording power error as claimed in claim 1 compensation method, the ratio of the recording power that it is characterized in that the recording power that gets from carrying out above-mentioned maximum low power speed best power to control to control and get with above-mentioned other low power speed best powers of execution, deduct the value of ratio of the reference recording power of the maximum low power speed reference recording power set in above-mentioned off-line state and maximum low power speed, this value that calculates with the best power controlling recording power of carrying out above-mentioned maximum low power speed on duty, with its value compensation recording power error.
CNB031507433A 2003-09-03 2003-09-03 Method for high-multiplier speed recording power error compensation Expired - Fee Related CN1312671C (en)

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Publication number Priority date Publication date Assignee Title
KR100701731B1 (en) 2006-03-23 2007-03-29 엘지전자 주식회사 Method for detecting optimum writing power in optical disc driver

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002042339A (en) * 2000-07-19 2002-02-08 Teac Corp Optical disk recorder
CN1367485A (en) * 2001-01-20 2002-09-04 三星电子株式会社 Method for controlling writng power in optical drive and its equipment
US20020136123A1 (en) * 2001-03-23 2002-09-26 Toshihiro Ogawa Optical disc drive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002042339A (en) * 2000-07-19 2002-02-08 Teac Corp Optical disk recorder
CN1367485A (en) * 2001-01-20 2002-09-04 三星电子株式会社 Method for controlling writng power in optical drive and its equipment
US20020136123A1 (en) * 2001-03-23 2002-09-26 Toshihiro Ogawa Optical disc drive

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