CN1227654C - Method for correcting optimum writing capability of CD - Google Patents
Method for correcting optimum writing capability of CD Download PDFInfo
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- CN1227654C CN1227654C CN 02105480 CN02105480A CN1227654C CN 1227654 C CN1227654 C CN 1227654C CN 02105480 CN02105480 CN 02105480 CN 02105480 A CN02105480 A CN 02105480A CN 1227654 C CN1227654 C CN 1227654C
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Abstract
The present invention provides a method for correcting the optimum power of an optical disc in an optical system. The optical disc is provided with a power correcting area; a count area and a test area are arranged in the power correcting area; a plurality of test sections are arranged in the test area. The method comprises the steps of orderly generating a plurality of first power grades, a plurality of second power grades, a plurality of first corresponding parameters, a predicted optimum power, a plurality of third power grades and a plurality of second corresponding parameters according to an index power and generating the optimum power according to the predicted optimum power, the first parameters and the second parameters.
Description
Technical field
The invention provides a kind of CD-RW discsCD-RW write the record power bearing calibration, refer to especially a kind of target that is used for the optical system CD-RW discsCD-RW write the record power bearing calibration.
Background technology
The numerical data use amount along with a large amount of uses of computer, also has the trend of rising.By the use of compact disc burning device, duplicative CD-RW discsCD-RW (CD-RW) is exactly a kind of storing media very easily.The compact disc burning device is to utilize laser that data are write in record to a CD-RW discsCD-RW.It is a very exquisite process that data are write in the CD-RW discsCD-RW, in writing the process of data, needs to drop into great mental and physical efforts and suffers damage to prevent CD-RW discsCD-RW.In order to ensure the quality that is stored in data in the CD-RW discsCD-RW, many kinds of capability correction methods all are used to the power of calibration of laser, record to CD-RW discsCD-RW so that data are correctly write.
Please refer to Fig. 1, but Fig. 1 is the synoptic diagram of known write-once type CD-RW discsCD-RW (CD-R) 10.For the clearer CD-RW discsCD-RW 10 that presents, Fig. 1 only presents the CD-RW discsCD-RW of quarter-wave plate.But write-once type CD-RW discsCD-RW 10 comprises a center pit 12, one capability correction district (power calibration area) 14, one nondeclarative memory district (programmemory area) 16, one introduces district (lead-in area) 18, one program area (program area) 20 is with a draw-out area (lead-out area) 22.Capability correction district 14 comprises a count block and a test section.The count block includes a plurality of counting units, and the test section then includes between a plurality of test sections corresponding to each counting unit.The compact disc burning device just utilizes in the program of capability correction between these test sections writes test data record between the test section.
Please refer to Fig. 2 and Fig. 3.Fig. 2 is the process flow diagram of known method in order to calibrating optical power.The synoptic diagram of employed measured power of Fig. 3 displayed map 2 methods and target power 46.In the known technology, but the compact disc burning device is from the introducing district 18 of write-once type CD-RW discsCD-RW 10 or read an index power 40 (indicated power) from the firmware database of compact disc burning device, try to achieve a target power 46 subsequently and according to index power 40, then make cd-rom recorder send laser and record to CD-RW discsCD-RW 10 so that data are write with target power 46.The step of known technology corrected output is as follows:
Step 30: introduce district 18 certainly and read index performance number 40;
Step 32: obtain between 1.3
*(index power) 42 and 0.7
*15 power ranks that are evenly distributed between (the index power) 44, and with these 15 power ranks test data is write to record to the CD-RW discsCD-RW 10 and write the record program to finish a test;
Step 34: assess above-mentioned 15 power ranks and write the record result, according to the result who writes record and transport the interpolation method and process of heterodyning is obtained target power 46.
As shown in Figure 3, these 15 other index values of power level are between 0 to 14, and are evenly distributed in 0.7
*(index power) 44 and 1.3
*(index power) 42.For instance, to represent the power of laser be 0.7 to index value 0
*(index power) 44; It is 1.3 that index value 14 is represented the power of laser
*(index power) 42; And index value 7 to represent the power of laser be exactly index performance number 40.This compact disc burning device is write the record test according to these 15 power ranks, to find out the position at target power 46 places.When the action that writes CD-RW discsCD-RW is during according to target power 46 operation, high frequency and the high-frequency signals HF with ideal symmetrical amplitude produce thereupon.General high-frequency signals has first amplitude (upper amplitude) A1 greater than zero the time, and having second amplitude (loweramplitude) A2 less than zero the time, amplitude measurement parameters β=(A1-A2)/(A1+A2) be is used for the relative size of comparison A1 and A2.When first amplitude A 1 of high-frequency signals HF just in time equals its second amplitude A 2 (that is β=0), then find the target power 46 of laser.
With Fig. 3 is example, and hypothetical target power 46 is between the laser power of the laser power of index value 8 and index value 9.The compact disc burning device just writes test data with these 15 power ranks.When the laser power with index value 8 write test data, second amplitude A 2 of high-frequency signals can be greater than its corresponding first amplitude A 1 (that is β＜0).On the other hand, when index of reference value 9 laser powers write test data, first amplitude A 1 of high-frequency signals can be greater than its corresponding second amplitude A 2 (that is β＞0).Therefore, write test result by analyzing these two, it is between the laser power of the laser power of index value 8 and index value 9 that the compact disc burning device just can calculate target power.Also can utilize the interpolation method to find out laser power when β=0 accurately to obtain target power 46.
Whenever utilizing known bearing calibration when obtaining target power 46, all need write test data with 15 power ranks.Yet CD-RW discsCD-RW 10 is damaged by high power laser light in writing the process of test data possibly.For example, hypothetical target power 46 is far below index power 40, and write surface that test data just might damage CD-RW discsCD-RW 10 as if the laser power with index value 15 this moment, because the laser power of index value 15 surpasses the scope that CD-RW discsCD-RW 10 can bear.This example shows, in the process of capability correction, even also has not the ghost of a chance data are write at the compact disc burning device and records to the program area 20 of CD-RW discsCD-RW 10 CD-RW discsCD-RW 10 and just damaged.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of target power bearing calibration that is used for the CD-RW discsCD-RW of optical system, to solve the above problems.
CD-RW discsCD-RW is provided with a capability correction zone among the present invention, be provided with a count block and a test section in this capability correction zone, be provided with a plurality of counting units in this count block, be provided with in this test section (test block) between a plurality of test sections, corresponding to a counting unit, be to be used for writing the record test data between each test section between each test section.This method includes according to an index power and produces a plurality of first power ranks, and the wherein said first power rank is between based on several the power ranks that are evenly distributed in the scope of index power; Select the lower N of power rank the second power rank in these first power ranks; According to these second power ranks, test data is write record between these test sections; Data in reading between this test section are to produce corresponding data signals and former first parameter of a plurality of correspondence; Use interpolation method or process of heterodyning to produce a target power of estimating according to first parameter; Produce a plurality of the 3rd power ranks according to this target power of estimating, wherein said the 3rd power rank is between based on several power ranks in the scope of the target power estimated; According to these the 3rd power ranks, test data is write record between these test sections; Data in reading between this test section are to produce corresponding data signals and second parameter of a plurality of correspondences; According to this target power of estimating, these first parameters and these second parameter generating, one target powers.
The invention has the advantages that the target power bearing calibration is to utilize the second power rank that test data is write record between the test section,, therefore can avoid testing laser to produce excessive power and damage CD-RW discsCD-RW because the second power rank is lower than index power rank.
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.
Description of drawings
But Fig. 1 is the synoptic diagram of known write-once type CD-RW discsCD-RW.
Fig. 2 is the process flow diagram of known target capability correction method.
The synoptic diagram of employed measured power of Fig. 3 displayed map 2 methods and target power.
Fig. 4 is the process flow diagram of target power bearing calibration of the present invention.
The synoptic diagram of Fig. 5 and employed measured power of Fig. 6 displayed map four methods and target power.
Embodiment
Target power bearing calibration of the present invention provides the compact disc burning device a kind of method that is better than the known power correction.The CD-RW discsCD-RW of introducing in background of invention is applicable in the present embodiment, similarly so repeat no more in this.
In the present embodiment, the compact disc burning device at first must be from the introducing district 18 in the CD-RW discsCD-RW 10 (lead-in area) reading of data, index power then is to read in the firmware database that is stored in the compact disc burning device, and the compact disc burning device produces a plurality of moderate measured power ranks immediately.In order to prevent that CD-RW discsCD-RW 10 from suffering damage because of too high laser power, the present invention utilizes an Improvement type target power bearing calibration to prevent that CD-RW discsCD-RW is damaged.
Please refer to Fig. 4 to Fig. 6.Fig. 4 is the process flow diagram of target power bearing calibration of the present invention.The synoptic diagram of Fig. 5 and employed measured power of Fig. 6 displayed map 4 methods and target power.As known correction method, target power correction method of the present invention is also used 15 power ranks when writing test data, so that try to achieve target power 96.Yet correction method of the present invention is not to carry out this 15 tests simultaneously.On the contrary, only utilize the in advance test of N lower power level, see whether target power 96 is positioned at this narrower scope.The step of target power correction method of the present invention show as after.
Step 50: introduce district 18 certainly and read index power (indicated power) 80;
Step 52: obtain between 1.3
*(index power) 82 and 0.7
*15 power ranks that are evenly distributed between (the index power) 84, and choose N lower power level, finish a test and write the record program;
Step 54: assess above-mentioned 15 power ranks and write the record result, according to the result who writes record and use interpolation method and process of heterodyning to try to achieve a target power (estimated optimal power) 86 of estimating;
Step 56: utilize remaining 15-N power rank to contain 0.8
*The target power of estimating 94 and 1.2
*The target power of estimating 92; And utilize these remaining 15-N power rank to finish test and write the record program;
Step 58: assess a remaining 15-N power level and else write the record performance;
Step 60: judge whether target power 96 drops on 0.8
*The target power of estimating 94 and 1.2
*In target power 92 scopes of estimating, if carry out step 62; If not, then carry out step 64;
Step 62: be used as Writing power with target power 96 and data write in the planning region of recording to the CD-RW discsCD-RW 10 20;
Step 64: judge whether this target power 96 is higher than 1.3
*The target power of estimating 92 is if carry out step 66; If not, carry out step 68;
Step 66: reduce the minimum measured power value that writes, just 0.7
* Index power 84, and the power rank that this reduced is set at new index power, carry out step 52;
Step 68: increase the highest measured power value that writes, just 1.3
* Index power 82, and the power rank that this increased is set at new index power, carry out step 52.
For energy above-mentioned process flow diagram more than you know, just be used as the target power correction method that example illustrates the present invention with figure five and figure six.As shown in Figure 5, when from the introducing district 18 of CD-RW discsCD-RW 10 or when reading an index power 80 from the firmware database of compact disc burning device, 15 between 0.7
*(index power) 84 and 1.3
*The power rank of (index power) 82 produces immediately.In the middle of these 15 power ranks, choose N lower power level and finish test and write the action of data to CD-RW discsCD-RW 10.In Fig. 5, N=4.For the purpose of insurance more, 4 selected power ranks necessarily all will be lower than index power 80, so just can guarantee when testing when writing data to CD-RW discsCD-RW the unlikely too high and damage CD-RW discsCD-RW 10 of laser power.
Next step writes data between the test section that is arranged in capability correction district 14 with these 4 lower power level.Identical with known method, all can corresponding measure a β value between each test section, according to these β values that occurs first, just can try to achieve the target power 86 of estimation again by interpolation method or process of heterodyning.
As shown in Figure 6, form one between 0.8 with the target power of estimating 86
*The target power of estimating 94 and 1.2
*The afterpower rank group of the target power of estimating 92.Because 4 in 15 power ranks were before tested, this afterpower group only comprises 11 power ranks, from index value 0B to index value 10B.Next, data are write record between the test section that is arranged in capability correction district 14, and calculate each β value simultaneously with these remaining power ranks.Same according to these β values that occurs for the second time, just can try to achieve target power 96 by interpolation method or process of heterodyning again.
Shown in the step 60 in Fig. 4 process flow diagram, if target power 96 does not drop on 0.8
*The target power of estimating 94 and 1.2
*In the scope of the target power of estimating 92, then can adjust index power 80 synchronously.For instance, if target power 96 greater than 1.2
*The target power of estimating 92, resetting index power so is one to 0.8
*The value that the target power estimated 94 is littler.More after the New Set power, the target power correction program is got back to step 52 again at overline, and index power at this moment is an index power that was updated.
Shown in the step 62 in Fig. 4 process flow diagram, if target power 96 drops on 0.8 just at the right time
*The target power of estimating 94 and 1.2
*In the scope of the target power of estimating 92, the target power correction program just is through with, and just according to target power 96 data is write and recorded to the program area 20 of CD-RW discsCD-RW 10.
Target power correction method of the present invention is not only applicable to the capability correction of readable formula CD-RW discsCD-RW, other any kind of laser discs, and for example: CD-RW, DVD-R, DVD-RW, DVD+RW or the like also are suitable for.With known art, target power correction method of the present invention adopts two stage test processs to decide target power when writing disk.Its Alpha test process is utilized N the power rank also lower than index power.Because only utilize the power rank be lower than index power, so that CD-RW discsCD-RW is subjected to the chance that high power laser light damages is very little.What is more, the result of Alpha test process more can import subordinate phase in the hope of an accurate target power value.Therefore, the invention provides a kind of process that safety and method are accurately finished optical power calibrating that has concurrently.
Certainly, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used 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 modification of the above embodiment.
Claims (17)
1. target power bearing calibration that is used for the CD-RW discsCD-RW of an optical system, this CD-RW discsCD-RW is provided with a capability correction zone, is provided with a count block and a test section in this capability correction zone; Being provided with a plurality of counting units in this count block, being provided with in this test section between a plurality of test sections, corresponding to a counting unit, is to be used for writing the record test data between each test section between each test section; This method includes:
Produce a plurality of first power ranks according to an index power, the wherein said first power rank is between based on several the power ranks that are evenly distributed in the scope of index power;
In these first power ranks, select the lower N of power rank the second power rank;
According to these second power ranks, test data is write record between these test sections;
Data in reading between this test section are to produce corresponding data signals and first parameter of a plurality of correspondences;
Use interpolation method or process of heterodyning to produce a target power of estimating according to first parameter;
Produce a plurality of the 3rd power ranks according to this target power of estimating, wherein said the 3rd power rank is between based on several power ranks in the scope of the target power estimated;
According to these the 3rd power ranks, test data is write record between these test sections;
Data in reading between this test section are to produce corresponding data signals and second parameter of a plurality of correspondences;
According to this target power of estimating, these first parameters and these second parameter generating, one target powers.
2. the method for claim 1 is characterized in that, the wherein said first power rank is between 1.3
*Index power and 0.7
*15 power ranks that are evenly distributed between the index power.
3. method as claimed in claim 2 is characterized in that, wherein said the 3rd power rank is between 0.8
*The target power of estimating and 1.2
*15-N between the target power of estimating power rank.
4. the method for claim 1 is characterized in that, the power of these second power rank correspondences is less than this index power.
5. the method for claim 1 is characterized in that, this index power train is stored in one of this CD-RW discsCD-RW and introduces the district, and this method includes in addition: read this index power by this introducing district.
6. the method for claim 1 is characterized in that, this index power is stored in the firmware database of a compact disc burning device, and this method includes in addition: by reading this index power in this firmware database.
7. the method for claim 1 is characterized in that, these first parameters and these second system of parameters calculate according to the amplitude of corresponding data signal.
8. method as claimed in claim 3 is characterized in that, also includes: if the power rank of this target power does not drop on 0.8
*The target power of estimating and 1.2
*In the scope between the target power of estimating, then adjust the power rank of this target power, and according to this this index power of adjusted power grade renewal.
9. method as claimed in claim 8 is characterized in that, when adjusting the power rank of this target power, is that index power is appointed as the power rank lower than power rank minimum in the 3rd power rank.
10. method as claimed in claim 8 is characterized in that, when adjusting the power rank of this target power, is that index power is appointed as than the higher power rank of power rank the highest in the 3rd power rank.
11. the method for claim 1 is characterized in that, record employed power during a program area to this CD-RW discsCD-RW is write with data by this target power system.
12. the method for claim 1 is characterized in that, this CD-RW discsCD-RW is a CD-R CD-RW discsCD-RW.
13. the method for claim 1 is characterized in that, this CD-RW discsCD-RW is a DVD-R CD-RW discsCD-RW.
14. the method for claim 1 is characterized in that, this CD-RW discsCD-RW is erasable.
15. the method for claim 1 is characterized in that, this CD-RW discsCD-RW is a CD-RW CD-RW discsCD-RW.
16. the method for claim 1 is characterized in that, this CD-RW discsCD-RW is a DVD-RW CD-RW discsCD-RW.
17. the method for claim 1 is characterized in that, this CD-RW discsCD-RW is a DVD+RW CD-RW discsCD-RW.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02105480 CN1227654C (en) | 2002-04-02 | 2002-04-02 | Method for correcting optimum writing capability of CD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02105480 CN1227654C (en) | 2002-04-02 | 2002-04-02 | Method for correcting optimum writing capability of CD |
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|---|---|
| CN1448920A CN1448920A (en) | 2003-10-15 |
| CN1227654C true CN1227654C (en) | 2005-11-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7920447B2 (en) | 2007-06-13 | 2011-04-05 | Mediatek Inc. | Method and system for calibrating an optimized power |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005216422A (en) * | 2004-01-30 | 2005-08-11 | Sanyo Electric Co Ltd | Optical recording/reproducing device |
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2002
- 2002-04-02 CN CN 02105480 patent/CN1227654C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7920447B2 (en) | 2007-06-13 | 2011-04-05 | Mediatek Inc. | Method and system for calibrating an optimized power |
| CN101335024B (en) * | 2007-06-13 | 2011-08-17 | 联发科技股份有限公司 | Method and system for calibrating an optimized power |
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| Publication number | Publication date |
|---|---|
| CN1448920A (en) | 2003-10-15 |
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