CN1750130A - Optimum storage power setting method according to magnetic disc ID - Google Patents
Optimum storage power setting method according to magnetic disc ID Download PDFInfo
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- CN1750130A CN1750130A CN 200410066382 CN200410066382A CN1750130A CN 1750130 A CN1750130 A CN 1750130A CN 200410066382 CN200410066382 CN 200410066382 CN 200410066382 A CN200410066382 A CN 200410066382A CN 1750130 A CN1750130 A CN 1750130A
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Abstract
The present invention relates to optimal storage power setting method according to magnetic disc ID. The method sets limit power based on magnetic disc characteristic to avoid abrupt deterioration of jitter signal. The write method has storage strategy process adopting certain jitter signal value as reference to adapt the minimum and maximum beta values, and sets the limit power as one magnetic disc characteristic based on the OPC algorithm decided simple equation. In this way, the inherent power limit of the same MI magnetic disc may be set effectively in obviously reduced error range.
Description
[technical field]
The invention relates to the technology in optical disc storage field.Specifically, about determining the optimum storage power method according to magnetic disc ID.This method is to set according to disk characteristics to limit power (Limit Power), thereby can control the control breakdown of unstable signal (Jitter) characteristic.
[background technology]
In general, the processing speed based on the data processor (data processor) of semiconductor improves rapidly.Thus, be not only the signal of video signal that comprises high image quality and the content of multimedia (multimedia contents) of voice signal, even Xiang Guan data are also just presenting the trend of high capacity therewith.Thereupon, medium is also just presenting the trend of high capacity.
Particularly compare with other medium, the capacity of CD is big, and is cheap, carry and the keeping very convenient.Therefore, in numerous mediums, it is a product of benefiting from very much the family favor.
In CD, existing consumer utilizes suitable device (for example: CD-R driver, CD-RW driver) WORM that directly stores or read (write once read many) but type CD and rewriting type (Rewritabletype) CD, have the data of will store in advance in the CD manufacture process to offer the consumer again, promptly the consumer can only read ROM (read only memory) the type CD of the data of having stored.
As mentioned above, with have the irradiation than the light beam of macro-energy of information stores to the physical characteristics of the light storage device of the disk information storage layer by changing CD, with information stores in the CD, utilization can not change the light beam with less energy of physical characteristics of information storage layer from the optical disk reading breath of winning the confidence.
This light storage device must be carried out the selected optimal power control procedure that is fit to the associative disk storage power in the CD-R canned data.
Meanwhile, through a series of best power control (optimal power control, be called for short OPC) process, doubly speed, temperature etc. determine its different values to the laser power of canned data (Laser Power) according to disk, storer, storage, when DVD-R/+R, carry out the OPC algorithm in Inner Disc Test Zone zone.
At this moment, be benchmark decision storage power with TB (Target Beta) value according to carving method (Write Straegy is called for short WS) definition.
In addition, multiple surrounding enviroment factors such as temperature, humidity, Tilt can cause that the Beta value changes.Therefore, can experience one usually with power limited process for certain value.
This process can not reflect the inherent characteristic of each CD, thereby can cause going wrong at storing step.
[summary of the invention]
But the optimal power determining method of the disk of the above original technology can produce following problem.
DVD-/+R Media is the basis with multiple manufacturing identifier (Manufacture ID is called for short MI), this MI serves as that the basis forms with different mediums and quality mutually.Therefore, the developer sets the WS (Write Strategy) that adapts with MI separately.
In original technology, the DVD algorithm and the MI of decision optimal power are irrelevant, and it is to carry out information stores according to setting certain Power Limit value.Therefore, will take place and to show the problem of surplus (Margin) input system of each disk difference.
The present invention creates for addressing the above problem, and its purpose is to provide the method according to magnetic disc ID decision optimum storage power.This method is to set according to disk characteristics to limit power (Limit Power), thereby can control the characteristic control breakdown of unstable signal (Jitter).
For achieving the above object, has the feature that constitutes by following step according to the method according to magnetic disc ID decision optimum storage power of the present invention:, discern associative disk and extract the step of MI (Manufacture ID) to set the limit value of disk power; Carrying out OPC (Optimal Power Control) process, obtain 1 curve between disk power and β value, is benchmark with the β value (TB) of target, determines the step of OPC power; With the storage power obtained is benchmark, and information stores to disk, is measured the unstable signal value of storage area and the power scan process of β value, the step of utilizing β maximal value and minimum value according to MI to determine power limited value.
, being included as decision OPC power here, is the step of benchmark decision OPC execution area with target beta value (TB);
If determined the OPC execution area, just decision should be carried out the storage of information at which zone (Partition), by increasing or reduce storage power gradually, in most positions canned data, obtain β value separately then, obtain the step of 1 formula of y=Ax+B again by 1 curve fitting (curve fitting).
And, if the Taregt Beta (TB) that determines with WS (Write Strategy) is the storage power of benchmark decision OPC.So, also comprise the step that the information stores that will carry out next OPC process (claims CountArea) in the counting region.
In addition, also be included in the power scan process, the storage power that obtains with execution OPC is a benchmark, measures unstable signal (Jitter) value of the part that writes down to disk storage information and β (Beta) value, draws then and does not move the step of the curve map of deciding signal and β; The step of the maximum unstable signal value (JP) that decision can be read according to the MI (Manufacture ID) of disk; If determined the reference value (JP) of the unstable signal that can read, the maximal value (β max) of decision β and the step of minimum value (β min).
As mentioned above, has following effect according to the method according to magnetic disc ID decision optimum storage power of the present invention.
The present invention is when the setting power limit value, WS (Write Strategy) is promptly in the process of working out storage policy, with certain unstable signal value (Jitter) is benchmark, to be fit to minimum value and the maximal value of β, and the expression of first degree of carrying out the decision of OPC algorithm is the basis, set the qualification power (Limit Power) of reflection disk characteristics, thereby can effectively set the self power limit value of the disk that uses same MI.
In addition, as mentioned above, the setting power limit value can be realized by simple algorithm under the situation of other hardware effort not having, and have the effect that can significantly reduce error range.
[description of drawings]
Fig. 1 is according to the concept map of the present invention according to magnetic disc ID decision optimum storage power;
Fig. 2 is the process flow diagram that shows the OPC algorithm according to the present invention;
Fig. 3 is the process flow diagram that shows the power scan algorithm according to the present invention;
Fig. 4 is the maximal value of decision β and the curve map of minimum value;
Fig. 5 is the curve map according to the more unstable characteristics of signals of β value.
[embodiment]
Other purpose of the present invention, characteristic and advantage can be understood by following example explanation.
Below just according to ideal case of the present invention, with reference to accompanying drawing to being described in detail according to the method according to magnetic disc ID decision optimum storage power of the present invention.
Fig. 1 is according to the concept map of the present invention according to magnetic disc ID decision optimum storage power.
WS of the present invention (Write Strategy) is about the qualification power of setting the reflection disk characteristics, promptly in the process of working out storage policy, with certain unstable signal (Jitter) value is benchmark, to be fit to minimum value and the maximal value of β, and the expression of first degree of carrying out the decision of OPC algorithm be the basis, sets the qualification power that reflects disk characteristics.
As can be seen from Figure 1, the system that sets optimal storage according to the present invention is made of following step: at first at identification disk (Disc) and after obtaining MI, by carrying out the step that OPC obtains power and 1 curve between Beta of disk; And if obtained 1 curve between disk power and β by carrying out OPC, utilize by power scan (Power Scan) and obtain the β maximal value of MI and the step that minimum value is obtained qualification power.
In Fig. 1, i represents the number of the MI (Manufacture ID) of definition in system.
Below, the present invention sets the method work of optimum storage power to describe in detail to foundation just to divide the execution OPC course of work and power scan process.
Fig. 2 is the process flow diagram of expression according to OPC algorithm of the present invention, and Fig. 3 is the process flow diagram of expression according to power scan algorithm of the present invention.
In addition, Fig. 4 is the maximal value of expression decision β and the curve map of minimum value, and Fig. 5 is the curve map of expression according to the more unstable characteristics of signals of β value.
At first, carry out the OPC course of work as shown in Figure 2,, utilize RECD signal retrieval COUNT AREA if the OPC process begins S201 according to the present invention, and decision OPC execution area S202.
Which simultaneously, as mentioned above,, just should determine at zone (Partition) canned data S203 if determined the OPC execution area.
Then, measure the β value, increase or reduce storage power gradually,, and obtain separately β value, obtain 1 formula S204 of y=Ax+B by curve fitting 13 Point canned datas.
By such process, the research staff is a benchmark with the Taregt Beta (TB) of WS decision, decision OPC storage power S205.
In addition, the information stores of carrying out next OPC process is gone up S206 to Count Area, the OPC process is carried out end S207.
As mentioned above, carry out after the OPC process, carry out the foundation power scan course of work of the present invention more as shown in Figure 3.
At first, if power scan process (Power Scan) begins to carry out, be benchmark to carry out the storage power that OPC obtains, increase or reduce storage power gradually, and with a part of information stores S302 to the disk.
Simultaneously, measure unstable signal value (Jitter) S303 of part of storage, measure β (Beta) value S304 then, as shown in Figure 4, the curve map of draw unstable signal and β.
In addition, maximal value (JP) S305 of research staff's unstable signal that decision may be read according to the MI (Manufacture ID) of disk.
Then, if set the reference value (JP) of the unstable signal that may read, just can determine the surplus S306 of β.
Promptly as shown in Figure 4, at first, the reference value (JP) of the unstable signal that process may read is measured the β value, by maximal value (β max) and the minimum value (β min) of this β value decision β, finishes power scan process S307 at last then.
As mentioned above, be when other hardware is not worked according to optimum storage power determining method of the present invention, according to carrying out simple algorithm, set the disk self power limit value that uses same MI.
As can be seen from Figure 5, if be that basic point increases power to the center gradually with OPC power, the situation of the value control breakdown of unstable signal will take place so.
In Fig. 5, (1) is represented according to original optimal power setting means setting power limit value, and (2) expression is according to optimal power establishing method setting power limit value of the present invention.
Original mode is that All Ranges is all set certain qualification power (Power Limit).Therefore, shown in (3) part of Fig. 5, can produce error range.
By comparison, be by the power scan process according to the method according to magnetic disc ID setting optimal power of the present invention, and consider the characteristic of disk, setting power limit value.Therefore, can reduce error range significantly.
By above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.
Therefore, the technical scope of this invention is not limited to the content on the instructions, must determine its technical scope according to interest field.
Claims (3)
1, according to the method for magnetic disc ID decision optimum storage power, comprising:
To set the limit value of disk power, the identification associative disk also extracts and makes identifier; Carrying out the best power control procedure, obtain 1 curve between disk power and β value, is benchmark with the β value of target, determines the best power power controlling;
With the storage power obtained is benchmark, and information stores to disk, is measured the unstable signal value of storage area and the power scan process of β value, utilizes maximal value and minimum value according to the β that makes identifier to determine power limited value.
2, the method for magnetic disc ID decision optimum storage power according to claim 1 is characterized in that:
For determining the best power power controlling, be benchmark with the target beta value, utilize RECD signal retrieval counting region and determine best power control execution area;
If determined best power control execution area, just which zone decision should carry out in the storage of information, by increasing or reduce storage power gradually, in a plurality of location storage information, obtain β value separately then, obtain 1 formula of y=Ax+B again by 1 curve fitting;
By this process, the research staff is a benchmark with the target beta value of carving method decision, and decision β storage power will be carried out the information stores of next best power control procedure to the counting region.
3, the method for magnetic disc ID decision optimum storage power according to claim 1 is characterized in that:
In the disk scanning process, the storage power that obtains with the control of execution best power is a benchmark, increases or reduce storage power gradually, and a part of information stores is arrived disk;
Unstable signal jitter value of the part that mensuration writes down to disk storage information and β value, the curve map of draw then unstable signal and β;
The maximum unstable signal value that decision may be read according to the manufacturing identifier of disk;
If set the reference value of the unstable signal that may read, just determine maximal value and the minimum value of β.
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| CN 200410066382 CN1750130A (en) | 2004-09-15 | 2004-09-15 | Optimum storage power setting method according to magnetic disc ID |
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| CN 200410066382 CN1750130A (en) | 2004-09-15 | 2004-09-15 | Optimum storage power setting method according to magnetic disc ID |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727921B (en) * | 2008-10-10 | 2012-05-02 | 蒂雅克股份有限公司 | Optical disk device and optical disk processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727921B (en) * | 2008-10-10 | 2012-05-02 | 蒂雅克股份有限公司 | Optical disk device and optical disk processing system |
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