CN1523582A - Method for writing data to optical storage medium - Google Patents
Method for writing data to optical storage medium Download PDFInfo
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- CN1523582A CN1523582A CNA031044816A CN03104481A CN1523582A CN 1523582 A CN1523582 A CN 1523582A CN A031044816 A CNA031044816 A CN A031044816A CN 03104481 A CN03104481 A CN 03104481A CN 1523582 A CN1523582 A CN 1523582A
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Abstract
The invention provides a method for using optical storage device to write data into optical storage media, which includes following steps: providing EFM waveform to optical storage device, the EFM waveform includes a previous stripe surface, current pit area and the next stripe surface; according to the wavelength of the previous stripe surface, current pit area and the next stripe surface, selects a group of writing project parameter from many groups of parameter; according to the parameter, it generates writing time length waveform; and uses the waveform to drive the optical picker to write data into the optical storage media.
Description
Technical field
The invention provides and a kind of data are write the method for optical storage medium, the information of particularly a kind of previous stripe surface according to the EFM waveform, current pit area and back one land writes data the method for optical storage medium.
Background technology
In recent years along with the Computing ability is more and more powerful, add that development of internet technology is constantly progressive, make the user utilize computing machine as multimedia audiovisual media and utilize computing machine as and the starting point linked up of the virtual network world and the various information of a large amount of accesses of world-wide web have been become a kind of trend.In this trend, because the demand to the data memory space heightens, therefore various storage tool also becomes popular product thereupon, wherein utilize the product of CD as storage medium, cheap and frivolous not the taking up space of volume is easy to carry owing to CD unit price under same memory capacity, all very attracted attention by the people all the time, the function of various especially over the years CD player and CD writer is become stronger day by day, reading quality and storage speed constantly upwards promotes, add except the CD of original CD specification, same volume more occurs but capacity increases the DVD specification of several times, more made CD player and CD writer almost become the standard configuration of every personal computer.
Optical storage (as CD writer or DVD burner etc.) is when arriving optical storage medium (as CD CD or DVD CD etc.) with data storage, can utilize the scrambler (Encoder) of this optical storage to be converted to the storage format of this optical storage medium these data, in current known technology, the storage format of this optical storage medium is generally RLL (Run-Length Limited (run length)) modulation, eight to 14 modulation waveforms (Eight-to-Fourteen Modulation Waveform for example, EFM Waveform), this EFM waveform is represented the data of desiring to be stored on this optical storage medium with the square wave of different time length, with CD is example, each pulse of this square wave and interpulse distance are three times of EFM reference period (EFM Base Frequency) to the length between 11 times of the EFM reference period, and this EFM waveform then is used for as this optical storage the foundation of data carving to this optical storage medium.When with data storage on this optical storage medium the time, utilize a plurality of lands (Land) and the hole that length differs on this optical storage medium to distinguish the content that (Pit) represents these data, the length in this land and hole district is then just corresponding to the waveform length of this EFM waveform, utilize this corresponding relation, then this optical storage can be with data storage to this optical storage medium.
And in practical application, this optical storage utilizes one group of writing scheme parameter (WriteStrategy Parameter) this EFM waveform transformation to be become to be used to drive the write time length waveform of its optical pickup apparatus (Pickup).For wiping dish, when this optical storage does not write data (when the signal that writes before just wiping makes it to be in land), this write time length waveform is in eliminates attitude (Erase Power), when this optical storage is desired to write data (when just being in the hole district), this write time length waveform then is in benchmark attitude (Bias Power) and includes a plurality of pulses in regular turn, this pulse makes this write time length waveform switch to from this benchmark attitude and writes attitude (Write Power), this writing scheme parameter then is used to be defined under the condition in different lands or hole district, the length of these a plurality of pulses and the state of spacing.
In known technology, the 1T scheme is adopted in the definition of writing scheme parameter usually, the cycle that is to say these a plurality of pulses in this write time length waveform is as the criterion for one times with this EFM reference period, yet carrying out along with the imprinting technology of optical storage medium, (32 times of speed for example can be at faster speed data carving to the optical storage of optical storage medium be appearred successively, the CD writer of 48 times of speed), this makes that the length of this EFM reference period is more and more short, under this situation, cause the length at the interval (promptly being positioned at the benchmark attitude) that each pulse in this write time length waveform (promptly be positioned at and write attitude) follows afterwards too short, because benchmark attitude between two pulses is to be used to allow the lip-deep chemical material of this optical storage medium be cooled off forming the required hole of correct storage data at interval, will make that cool time, deficiency produced the problem of data storage distortion so the benchmark attitude gap length that causes because of the high speed imprinting is too short.In order to solve the problem of this 1T scheme, propose a kind of 2T scheme in the known technology and (please refer to Orange Book Part III, Volume 3), because utilizing the cycle of these a plurality of pulses in this write time length waveform of 2T scheme is to be as the criterion with this EFM reference period twice, therefore the length at this pulse and interval is therebetween all prolonged, therefore also make the lip-deep chemical material of this optical storage medium can have after at every turn by this pulsed etch time enough can cool off forming correct hole, and solved the problem of 1T scheme.
But, the disclosed 2T scheme of known technology, since its when decision writing scheme parameter only according to the length of the current pit area in this EFM waveform, and this current pit area be corresponding to desire current on this optical storage medium surface etched hole district, so itself and reckon without deserve before the hole previous stripe surface and thereafter a land for the influence that etching result caused in this hole.Again owing in defined a plurality of pulses in this 2T scheme, the length of other pulses except last pulse and interval therebetween are fixing value, and the parameter that can adjust change only comprises the part relevant with the state of last pulse, this makes shake (Jitter) phenomenon in this hole district that internal error owing to this optical storage medium causes, can can't fully eliminate because this writing scheme parameter lacks enough adjustment spaces, thereby become the factor that causes error.
Summary of the invention
Therefore the fundamental purpose of the present invention information that is to provide a kind of previous stripe surface according to the EFM waveform, current pit area and back one land writes the method for optical storage medium with data, to solve above-mentioned known problem.
According to claim of the present invention, a kind of method of using optical storage data to be write optical storage medium is disclosed, this optical storage includes a storer and optical pickup apparatus, store many group writing scheme parameters in this storer, this method includes following steps: provide eight to 14 modulation waveforms to this optical storage, this eight to 14 modulation waveform includes previous stripe surface, current pit area and back one land; According to the waveform length of this previous stripe surface, this current pit area and this back one land, choose one group of corresponding writing scheme parameter in many groups writing scheme parameter of from this storer, being stored; Writing scheme parameter according to this group is selected produces the write time length waveform; And utilize this write time length waveform to drive this optical pickup apparatus the data corresponding to these eight to 14 modulation waveforms are write this optical storage medium.
Method of the present invention is the previous stripe surface of utilizing on this EFM waveform, the information of current pit area and back one land is chosen one group of corresponding writing scheme parameter, when this group writing scheme parameter of decision not only with reference to the data in the etched hole of current desire district, also considered the information of the previous land and a back land in this hole district simultaneously, done more accurate control for the length that in fact is positioned at lip-deep land of this optical storage medium and hole district, method of the present invention has on the other hand also been done more detailed definition to this writing scheme parameter and has been adjusted the space to increase it, and then has significantly improved the error problem that this optical storage medium causes because of jitter phenomenon.
Description of drawings
Fig. 1 is the process flow diagram that data is write the method for optical storage medium of the present invention.
Fig. 2 is the synoptic diagram of 2T writing scheme parameter of the present invention.
Fig. 3 chooses the process flow diagram of the method for writing scheme parameter for step 12 among Fig. 1.
Symbol description in the accompanying drawing
Step 20,22,24,26,28
Embodiment
The present invention writes data the method for optical storage medium for using optical storage, wherein this optical storage includes storer and optical pickup apparatus, and store to organize the writing scheme parameters in this storer more, should be noted that, in an application of the invention, this optical storage can be CD writer (CD Burner), this moment, this optical storage medium can be for repeating to write formula CD (CD-RW), in addition, this optical storage can also be digital versatile disc CD writer (DVD Burner), this optical storage medium then can be recordable digital versatile disc (DVD-R), perhaps for repeating to write formula digital versatile disc (DVD-RW), in following embodiment, will use eight to 14 modulation waveforms to be example again, yet under the situation that does not influence enforcement of the present invention, use the example of other RLL modulation waveforms also to belong to covering scope of the present invention.
With reference to figure 1, show among Fig. 1 that the present invention writes the process flow diagram of the method for optical storage medium with data, it includes following steps:
Step 10: provide eight to 14 modulation waveforms to this optical storage, this eight to 14 modulation waveform includes previous stripe surface (Previous Land), current pit area (Current Pit) and back one land (Next Land);
Step 12:, choose one group of corresponding writing scheme parameter in many groups writing scheme parameter of from this storer, being stored according to the waveform length of this previous stripe surface, this current pit area and this back one land;
Step 14: the writing scheme parameter according to this group is selected produces the write time length waveform;
Step 16: utilize this write time length waveform to drive this optical pickup apparatus the data corresponding to these eight to 14 modulation waveforms are write this optical storage medium.
Wherein this eight to 14 modulation waveform (being the EFM waveform) is as noted earlier, with respect to a plurality of etched hole district (Pit) that is used to represent the data of being stored on this optical storage medium and not etched land (Land), it is corresponding with it that this EFM waveform also includes a plurality of hole district and land respectively, for instance, high level in available this EFM waveform in this hole district is represented, and the low level in then available this EFM waveform of this land is represented.As previously mentioned, the waveform length of every hole district of this EFM waveform and land all between three times of EFM reference period between 11 times of the EFM reference period and be the integral multiple of this EFM reference period.At each the etched hole of current just desire district on this optical storage medium, it all has corresponding current pit area on this EFM waveform, and the back land after the previous stripe surface in this current pit area the place ahead and this current pit area.
In method of the present invention and the known technology method maximum of decision writing scheme parameter different be in, in above-mentioned steps 12, except waveform length, choose one group of corresponding writing scheme parameter in many groups writing scheme parameter of also coming from this storer, to be stored with reference to the waveform length of this previous stripe surface and this back one land simultaneously according to this current pit area.And this writing scheme parameter as previously mentioned, be used to be defined under the condition in different lands or hole district, the length of these a plurality of pulses in this write time length waveform and the state of spacing, therefore the method for the present invention writing scheme parameter that can be selected according to this group in step 14 produces this write time length waveform.This write time length waveform as previously mentioned, elimination attitude PE, the benchmark attitude PB that serves as reasons continuous and write that attitude PW performance number is switched mutually and the waveform that forms, should be noted that, elimination attitude PE, benchmark attitude PB in this write time length waveform and the value that writes attitude PW are preset value, and can be different and different because the EFM waveform of input.
Next the method for choosing this group writing scheme parameter in the aforesaid step 12 will be described,, show the synoptic diagram of 2T writing scheme parameter of the present invention among Fig. 2 with reference to figure 2.In a preferred embodiment of the invention, the invention provides a kind of is the method that benchmark defines the writing scheme parameter with the 2T scheme, that is to say, the cycle of these a plurality of pulses in this write time length waveform is to be as the criterion with this EFM reference period twice.In Fig. 2, one times the length of this EFM reference period T is all represented at the interval between a plurality of vertical dotted lines, and this sentence have reference period T11 doubly EFM waveform of the current pit area of (being 11T) be example.In this case, the defined writing scheme parameter of method of the present invention is then shown in the write time length waveform among Fig. 2, with details are as follows.
Method of the present invention defines first parameter d
1, first parameter d
1Representative is the delay (Delay) to the leading edge of first pulse of this write time length waveform from the leading edge of this current pit area, and stipulate this write time length waveform first pulse trailing edge and this current pit area leading edge backward twice reference period T part align; Second parameter beta
1, second parameter beta
1Representative is the delay to the leading edge of a back pulse of this first pulse from the trailing edge of first pulse of this write time length waveform; A plurality of repetition pulse parameter alpha
2, α
3, α
4..., the repetition pulse parameter alpha
2, α
3, α
4... represent in this write time length waveform the length of other pulses except first pulse and last pulse respectively, and be defined in this write time length waveform in the middle of other pulses except first pulse and last pulse, the length between the leading edge of any continuous two pulses equals the twice of reference period T; The 3rd parameter d
m, the 3rd parameter d
mRepresentative from the trailing edge of this current pit area forward twice reference period T part to the delay of the leading edge of last pulse of this write time length waveform; The 4th parameter alpha
m, the 4th parameter alpha
mRepresent the length of last pulse of this write time length waveform; And Wucan is counted d
b, Wucan is counted d
bThen represent trailing edge to switch back the delay of eliminating attitude PE part to last times of reference period T part to this write time length waveform from this current pit area.It is noted that aforesaid a plurality of repetition pulse parameter alpha
2, α
3, α
4... can be the numerical value that is equal to each other, also can be the numerical value that may not equate each other, this design because of different application is selected.
According to above-mentioned defined each writing scheme parameter, then other various features of this write time length waveform among Fig. 2 all can be learnt, the length alpha of first pulse that for example should the write time length waveform
1Be that the length that equals reference period T twice deducts first parameter d
1(be α
1=2T-d
1), and in should the write time length waveform in the middle of other pulses except first pulse and last pulse, the length that the length that the delay between the trailing edge of any one pulse and the leading edge of its next pulse equals twice reference period T deducts this pulse (be β
2=2T-α
2, β
3=2T-α
3...), and trailing edge to this write time length waveform of last pulse that should the write time length waveform to switch back the delay of eliminating attitude PE part be to equal Wucan to count d
bThe length that adds one times of reference period T deducts the 3rd parameter d
mDeduct the 4th parameter alpha again
mThe value of gained (is β
m=d
b+ T-d
m-α
m).
With reference to figure 3, among Fig. 3 in the displayed map 1 method of the present invention choose the process flow diagram of writing scheme parameter in step 12, in many groups writing scheme parameter of wherein in this storer, being stored, include a plurality of first parameter d
1And second parameter beta
1, organize repetition parameter group α more
2, α
3, α
4... and a plurality of the 3rd parameter d
m, the 4th parameter alpha
m, and Wucan count d
bThen this method also includes following steps: step 20: read from this eight to 14 modulation waveform and judge this previous stripe surface, this current pit area, and the waveform length of this back one land;
Step 22: according to the waveform length of this previous stripe surface and this current pit area, from these a plurality of first parameter d
1In choose corresponding first parameter d
1, the while is according to the waveform length of this previous stripe surface and this current pit area, from these a plurality of second parameter beta
1In choose corresponding second parameter beta
1
Step 24:, from these a plurality of repetition pulse parameter group, choose one group of corresponding repetition pulse parameter group, promptly a plurality of repetition pulse parameter alpha according to the waveform length of this current pit area
2, α
3, α
4...;
Step 26: according to the waveform length of this current pit area and this back one land, from these a plurality of the 3rd parameter d
mIn choose corresponding the 3rd parameter d
m, and according to the waveform length of this current pit area, from these a plurality of the 4th parameter alpha
mIn choose corresponding the 4th parameter alpha
m, according to the waveform length of this current pit area and this back one land, count d simultaneously from these a plurality of Wucans
bIn choose corresponding Wucan and count d
bStep 28: with first parameter d that is selected
1, second parameter beta
1, this repetition pulse parameter group, the 3rd parameter d
m, the 4th parameter alpha
mAnd Wucan is counted d
bForm this group writing scheme parameter that is selected.
Compare with known technology, the method that use optical storage of the present invention writes optical storage medium with data is utilized the previous stripe surface on the EFM waveform, the information of current pit area and back one land is chosen one group of corresponding writing scheme parameter, when this group writing scheme parameter of decision not only with reference to the data in the etched hole of current desire district, also considered the information of the previous land and a back land in this hole district simultaneously, done that more accurate control method of the present invention on the other hand also adopts the 2T scheme and this writing scheme parameter has been done more detailed definition adjusted the space for the length that in fact is positioned at lip-deep land of this optical storage medium and hole district, and then significantly improved 1T scheme deficiency cool time to increase it, reach the error problem that this optical storage medium causes because of jitter phenomenon.
The above only is the preferred embodiments of the present invention, and all equivalent variations and modifications of doing according to claim of the present invention all belong to the covering scope of patent of the present invention.
Claims (19)
1. one kind is used optical storage that data are write the method for optical storage medium, and this optical storage includes storer and optical pickup apparatus (Pickup), stores many group writing scheme parameters in this storer, and this method includes following steps:
Provide the RLL modulation waveform to this optical storage, this RLL modulation waveform includes previous stripe surface (Previous Land), current pit area (Current Pit) and back one land (Next Land);
According to the waveform length of this previous stripe surface, this current pit area and this back one land, choose one group of corresponding writing scheme parameter in many groups writing scheme parameter of from this storer, being stored;
Writing scheme parameter according to this group is selected produces the write time length waveform; And
Utilize this write time length waveform to drive this optical pickup apparatus the data corresponding to this RLL modulation waveform are write this optical storage medium.
2. the method for claim 1, wherein this RLL modulation waveform has reference period (EFMBase Period), and when this optical storage does not write data, this write time length waveform is to be in to eliminate attitude (Erase Power), when this optical storage is desired to write data, this write time length waveform then is in benchmark attitude (Bias Power) and includes a plurality of pulses in regular turn, and this pulse is this write time length waveform to be switched to from this benchmark attitude write attitude (Write Power).
3. method as claimed in claim 2, wherein should many group writing scheme parameters include a plurality of first parameters and a plurality of second parameter, each this first parameter representative is the delay (Delay) to the leading edge of first pulse of this write time length waveform from the leading edge of this current pit area, each this second parameter representative is the delay to the leading edge of a back pulse of this first pulse from the trailing edge of first pulse of this write time length waveform, and this method also includes following steps:
According to the waveform length of this previous stripe surface and this current pit area, from these a plurality of first parameters, choose corresponding first parameter; And
According to the waveform length of this previous stripe surface and this current pit area, from these a plurality of second parameters, choose corresponding second parameter.
4. method as claimed in claim 2, wherein these a plurality of writing scheme parameters include many group repetition pulse parameter group, include a plurality of repetition pulse parameters in each this group repetition pulse parameter group, these a plurality of repetition pulse parameters are represented in this write time length waveform the length of other pulses except first pulse and last pulse respectively, and in the middle of other pulses in this write time length waveform except first pulse and last pulse, length between the leading edge of any two pulses continuously equals the twice of this reference period, and this method also includes following steps:
According to the waveform length of this current pit area, from these a plurality of repetition pulse parameter group, choose one group of corresponding repetition pulse parameter group.
5. method as claimed in claim 2, wherein these a plurality of writing scheme parameters include a plurality of the 3rd parameters, a plurality of the 4th parameters and a plurality of Wucan number, the representative of each the 3rd parameter from the trailing edge of this current pit area forward this reference period twice part to the delay of the leading edge of last pulse of this write time length waveform, each the 4th parameter is represented the length of last pulse of this write time length waveform, each this Wucan number is representative from one times of part of this reference period delay of switching back this elimination attitude part to this write time length waveform forward of the trailing edge of this current pit area, and this method also comprises following steps:
According to the waveform length of this current pit area and this back one land, from these a plurality of the 3rd parameters, choose corresponding the 3rd parameter;
According to the waveform length of this current pit area, from these a plurality of the 4th parameters, choose corresponding the 4th parameter; And
According to the waveform length of this current pit area and this back one land, from these a plurality of Wucan numbers, choose corresponding Wucan number.
6. method as claimed in claim 3, the trailing edge of first pulse that wherein should the write time length waveform and the leading edge of this current pit this reference period twice part are backward alignd.
7. method as claimed in claim 3, the length of first pulse that wherein should the write time length waveform is that the length that equals this reference period twice deducts first parameter that this is selected.
8. method as claimed in claim 4, these a plurality of repetition pulse parameters that wherein belong in the same repetition pulse parameter group are equal to each other.
9. method as claimed in claim 4, these a plurality of repetition pulse parameters that wherein belong in the same repetition pulse parameter group may not be equal to each other.
10. method as claimed in claim 2, wherein in this write time length waveform in the middle of other pulses except first pulse and last pulse, the length that the delay between the trailing edge of any one pulse and the leading edge of its next pulse equals this reference period twice deducts the length of this pulse.
Equal this Wucan number that is selected and add that the length of one times of this reference period deducts the value that this 3rd parameter that is selected deducts this 4th parameter gained that is selected again 11. method as claimed in claim 5, trailing edge to this write time length waveform of last pulse that wherein should the write time length waveform are switched back the delay of this elimination attitude part.
12. method as claimed in claim 2, wherein the waveform length of this previous stripe surface, this current pit area and this back one land be the multiple of this reference period and between three times of this reference period between 11 times of this reference period.
13. method as claimed in claim 2, wherein this elimination attitude, this benchmark attitude and this value that writes attitude are preset value, and can be not different because of different RLL modulation waveforms.
14. the method for claim 1, wherein this optical storage is CD writer (CDBurner).
15. method as claimed in claim 14, wherein this optical storage medium is for repeating to write formula CD (CD-RW).
16. the method for claim 1, wherein this optical storage is digital versatile disc CD writer (DVD Burner).
17. method as claimed in claim 16, wherein this optical storage medium is recordable digital versatile disc (DVD-R).
18. method as claimed in claim 16, wherein this optical storage medium is for repeating to write formula digital versatile disc (DVD-RW).
19. the method for claim 1, wherein this RLL modulation waveform is eight to 14 modulation waveforms (Eight-to-Fourteen Modulation Waveform, EFM Waveform).
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| CN 03104481 CN1254797C (en) | 2003-02-17 | 2003-02-17 | Method for writing data to optical storage medium |
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| CN 03104481 CN1254797C (en) | 2003-02-17 | 2003-02-17 | Method for writing data to optical storage medium |
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| CN1254797C CN1254797C (en) | 2006-05-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159156B (en) * | 2006-10-05 | 2010-06-09 | 联发科技股份有限公司 | Methods for tuning write strategy parameters of optical storage device, and systems thereof |
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|---|---|---|---|---|
| CN101159156B (en) * | 2006-10-05 | 2010-06-09 | 联发科技股份有限公司 | Methods for tuning write strategy parameters of optical storage device, and systems thereof |
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