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

Abstract

The present invention relates to a high-speed recording power error compensation method, which includes the following stages: the first stage is to calculate the ratio between the high-speed reference recording power and the maximum low-speed reference recording power set in the off-line state in advance, and in the actual The maximum low-speed reference recording power obtained by performing OPC in the PCA area, thereby predicting the high-speed power; the second stage, reflecting the low-speed reference recording power lower than the above-mentioned maximum low speed, and performing OPC in the actual PCA area. The reference recording power, so as to compensate the error of recording power. According to the high-speed recording power error compensation method of the present invention, when setting the high-speed optical recording and playback device, the error generated according to the predicted recording power value is calculated to compensate the error when setting the high-speed recording power.

Description

Power Error Compensation Method for High Speed Recording

(1) Technical field

The invention relates to a high-speed recording power error compensation method, in particular, when setting the recording power of a high-speed optical recording and playback device, the error generated is calculated according to the predicted recording power value, so as to set the high-speed recording power errors can be compensated.

(2) Background technology

The Orange book (Orange book) of the optical disc specification for recording is defined as follows. It is convenient to find the optical disc area with the best recording power. The Optimum Power Control (OPC) area is the read area (read area) of the above-mentioned optical disc for recording. ) inside the power calibration area (Power Calibration Area: PCA).

Conventionally, in order to set the recording power of CD-R/RW, the most suitable power is set through the optimal power control (hereinafter referred to as OPC) process in the innermost peripheral PCA area on the optical disc.

However, with the recent increase in double speed of CD-RW drive (Drive) and CD-R, the OPC execution originally applied to the PCA area of the above-mentioned low double speed recording power is no longer suitable.

Next, the high-speed recording power is set without performing actual OPC, and the recording power is set by prediction. However, errors occur between the recording power configured as described above and the actual optimum power.

FIG. 1 is a flow chart of a method for compensating power errors in high-speed recording according to the prior art. As shown in the figure, first, the ratio R1 of the high-speed reference recording power to the low-speed reference recording power predetermined in an off-line state is calculated (S101). Here, the value predetermined in the above-mentioned off-line state refers to the value obtained during the experiment, which reflects the characteristics of the optical pickup (P/U), the error of the IC, and the disc with the same brand code The value obtained from the deviation between.

Next, in the PCA area of the actual optical recording and reproducing device, OPC is executed at a low speed, and the recording power P1 is set (S102). This is because the recording power obtained above is different from the recording power at the time of actual recording, and the actual recording is performed.

Thereafter, calculate the ratio R1 of the above-mentioned high-speed reference recording power to the low-speed reference recording power and the above-mentioned OPC recording power P1 performed at the low speed to predict the high-speed recording power to be performed in the actual optical recording and playback device (S103). Here, since the OPC cannot be performed at the high speed, the high speed recording power is predicted with reference to the obtained ratio of the low speed reference recording power to the actual power.

However, the recording power predicted and set according to the above method will definitely have an error with the optimum actual recording power, thereby affecting the recording quality.

(3) Contents of the invention

The present invention was created in order to improve the above-mentioned problems, and its purpose is to provide a high-speed recording power error compensation method, by means of this method, when the high-speed optical recording and playback device sets the recording power, according to the predicted recording power value , calculate the generated error, so that the error can be compensated when setting the high-speed recording power.

In order to achieve the above object, according to the high-speed recording power error compensation method of the present invention, it is characterized in that it includes the following stages:

In the first stage, calculate the ratio between the high-speed reference recording power and the maximum low-speed reference recording power set in advance in the offline state, and the maximum low-speed reference recording power obtained by performing OPC in the actual PCA area, thereby predicting The high-speed power includes: (1) The ratio R1 of the preset high-speed reference recording power to the maximum low-speed reference recording power in the offline state is obtained in the off-line state. The predetermined value in the above-mentioned off-line state refers to the The value obtained during the experiment, the above-mentioned maximum low-speed reference recording power, is set to the double speed of the OPC actually executed in the high-speed optical recording and playback device; OPC and setting recording power P1; (3) (3) calculate above-mentioned R1 and P1, thus predict the high-speed recording power value P _{High_speed} that will be carried out in actual optical recording playback device, that is, P _{High_speed} =R1*P1;

The second stage, compensating for the error of the recording power, includes: (1) again, the ratio R2 of the preset maximum low-speed reference recording power and other low-speed reference powers obtained in the offline state of the above-mentioned stage, and the above-mentioned other low-speed reference powers The double speed refers to the double speed lower than the above-mentioned maximum low speed; (2) Then, in the PCA area of the actual optical recording and playback device, execute OPC with other low speeds to set the recording power P2; (3) secondly, calculate the above-mentioned maximum low speed The ratio R3 between the recording power P1 obtained by executing OPC at double speed and the recording power P2 obtained by performing OPC at other low speeds mentioned above; (4) Finally, according to the values obtained in the above stages, the high The double-speed recording power error compensation value P _{Enhanced_High_speed} , that is, the calculation of P _{Enhanced_High_speed} is as follows:

P _{Enhanced_High_speed} = P1×R1+α×(R3-R2)

Among them: α is the multiplication factor.

The high-speed recording power error compensation method described above is characterized in that the ratio of the recording power obtained by performing the above-mentioned highest low-speed OPC to the recording power obtained by performing the above-mentioned other low-speed OPCs is subtracted from the above-mentioned offline work. The value of the ratio of the maximum low-speed reference recording power to the maximum low-speed reference recording power is multiplied by the value calculated by performing the above-mentioned maximum low-speed OPC recording power, and the recording power error is compensated by the value.

According to the high-speed recording power error compensation method of the present invention as described above, when setting the high-speed optical recording and playback device, the error generated according to the predicted recording power value is calculated, so that the error can be compensated when setting the high-speed recording power .

In order to further illustrate the above-mentioned purpose, structural features and effects of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings.

(4) Description of drawings

FIG. 1 is a flow chart of a method for compensating power errors in high-speed recording according to the prior art.

FIG. 2 is a flow chart of a method for compensating power errors in high-speed recording according to a specific embodiment of the present invention.

FIG. 3 is a schematic diagram showing the magnitude ratio of the compensated recording power value according to the recording power error compensation method of the present invention.

(5) specific implementation

FIG. 2 is a flow chart of a method for compensating power errors in high-speed recording according to a specific embodiment of the present invention. As shown in the figure, the ratio R1 of the preset high-speed reference recording power to the maximum low-speed reference recording power in the offline state (off-line) is obtained (S201).

Here, the value predetermined in the above-mentioned off-line state refers to the value obtained during the experiment, which reflects the characteristics of the optical pickup (P/U), the error of the IC, and the disc with the same brand code The value obtained from the deviation between. In addition, the above-mentioned maximum low-speed reference recording power is set to the double speed of the OPC actually executed in the high-speed optical recording and reproducing apparatus.

Next, in the PCA area of the actual optical recording and playback device, OPC is executed at the maximum low speed to set the recording power P1 (S202).

Secondly, calculate the ratio of the preset high-speed reference recording power to the maximum low-speed reference recording power in the offline state (Power_Ratio: set to R1) and the OPC recording power executed at the above-mentioned maximum low speed by calculating the above-mentioned offline state (P _{Low_speed} : set to P1), so as to predict the high-speed recording power P _{High_speed} to be implemented in the actual optical recording and playback device (S203). Wherein, since the aforementioned Power_Ratio is set as R1 and P _{Low_speed} is set as P1, the high-speed recording power P _{High_speed} is calculated as follows: P _{High_speed} =P _{Low_speed} *Power_Ratio=R1×P1.

Again, the ratio R2 of the preset maximum low-speed reference recording power and other low-speed reference powers obtained in the above-mentioned stage S201 off-line (S204). Here, the maximum low speed refers to the maximum low speed of OPC that can be implemented in the high speed optical recording and playback device, and the other low speeds refer to speeds lower than the above maximum low speed.

For example, if the multiple speed of the high-speed optical recording and playback device of the present invention is X24, then the above-mentioned maximum low multiple speed is X16, and other low multiple speeds are X12.

Next, in the PCA area of the actual optical recording and playback device, OPC is executed at another low speed to set the recording power P2 (S205). Here, there will be an error between the recording power obtained by performing the above actual OPC at the same double speed and the recording power obtained in the off-line state, not only due to disc characteristic differences between each disc manufacturer, It is also caused by differences in usage and production errors among manufacturers of optical recording and playback devices that record data on up-speed optical discs.

Next, the ratio R3 between the recording power P1 obtained by performing OPC at the above-mentioned maximum low speed and the recording power P2 obtained by performing OPC at the above-mentioned other low speed is calculated (S206).

Finally, the high-speed recording power error compensation value P _{Enhanced_High_speed} is obtained according to the values obtained in the above stages (S207). Among them, the calculation of the high-speed recording power error compensation value P _{Enhanced_High_speed} is as follows:

P _{Enhanced_High_speed} =P _{Low_speed} *Power_Ratio+α*Δ

Δ＝C_Power_Ratio-LS_Power_Ratio

Here a is the speed factor (Speed Factor), C_Power_Ratio is the low speed power ratio (Power_Ratio, the above-mentioned R3) calculated by executing the actual OPC, and LS_Power_Ratio is the average low speed power ratio (Power_Ratio) measured in the offline state , that is, the above-mentioned R2).

That is, P _{Enhanced_High_speed} =P1×R1+α×(R3-R2)

FIG. 3 is a schematic diagram showing the magnitude ratio of the compensated recording power value according to the recording power error compensation method of the present invention. As shown in the figure, the recording power can be set to an optimum value by compensating for errors.

In addition, the ratio between the maximum low speed and the low speed (for example, X16, X12) can be reflected in the above process, and here, the ratio between the lower low speed (X8, X4) can also be reflected, so that errors can be compensated.

As mentioned above, according to the high-speed recording power error compensation method of the present invention, when the high-speed optical recording and playback device sets the recording power, the error generated is calculated according to the predicted recording power value, so as to set the high-speed recording power. , the error can be compensated.

Although the present invention has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, and it should be understood that various changes and modifications can be made in the present invention. It does not deviate from the present invention in a broad sense, so it is not intended as a limitation to the present invention. As long as it is within the spirit of the present invention, changes and modifications to the above-mentioned embodiments will fall within the scope of the claims of the present invention.

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_speed}Be 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.

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