CN101872636B - Flaw block judging device and method for optical discs - Google Patents
Flaw block judging device and method for optical discs Download PDFInfo
- Publication number
- CN101872636B CN101872636B CN2009101321367A CN200910132136A CN101872636B CN 101872636 B CN101872636 B CN 101872636B CN 2009101321367 A CN2009101321367 A CN 2009101321367A CN 200910132136 A CN200910132136 A CN 200910132136A CN 101872636 B CN101872636 B CN 101872636B
- Authority
- CN
- China
- Prior art keywords
- block
- error
- amount
- position signal
- burning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The invention relates to a flaw block judging device and method for optical discs. The method comprises the following steps of: receiving programming data and command and storing the programming data in a memory by a processor; forming the programming data to an encoded digital signal through an EEC (error correction code) correcting code, then forming a modulated quantity position signal through a modulator and storing the modulated quantity position signal in the memory; controlling the reading head to burn or reading the modulated quantity position signal by the processor, comparing the errors before and after burning the modulated quantity position signal by using a comparison unit and directly judging the flaw block state to high or low error and decoding the medium errors, and judging the flaw block state according to the decoded result.
Description
Technical field
Relevant a kind of flaw block judging device of the present invention and method, especially about CD-ROM drive in the time can repeating burning discs burning data, whether the checking burning data mistake, to judge the device and method of flaw block.
Background technology
Discs often is subjected to factors such as dust, spot, scratch, workmanship, material degradation or burning quality, causes the data mark of subregion impaired, forms flaw block.Data can't normally read as being burned onto flaw block.Discs provides mechanisms of defect management, and the address and the backup of login flaw block are in order to avoid cause the damage of storage data.
As shown in Figure 1, for TaiWan, China is announced I302300 patent case prior art, disclose the flow process of disk defect block decision method.At first, read the data mark of burning in discs at step P1.Enter step P2, utilize error-correcting code (Error Correct Code is called for short the ECC correcting code), carry out the decoding of data mark.Enter step P3 again, does checking have decoding error to produce? if do not produce decoding error, then enter step P4, directly be judged to be non-flaw block.If the generation decoding error then enters step P5, utilize the ECC correcting code to carry out the correction of decoding error.Then enter step P6, check whether decoding error is proofreaied and correct successfully? if proofread and correct successfully, then enter step P4, be judged to be non-flaw block, if decoding error is not proofreaied and correct success, then enter step P7, be judged to be flaw block, by the address of mechanisms of defect management login flaw block, and the burning backup.
Aforementioned prior art is by determining the place of flaw block in advance, though can avoid data burning at flaw block.But no matter the impaired degree in each zone of discs, prior art is proofreaied and correct, to determine flaw block without exception to all block that produces decoding error.Because the correction of decoding error need expend many times, will seriously reduce CD-ROM drive and carry out usefulness.Other has TaiWan, China to disclose the prior art of No. 200638413 patent case, discloses the amount of error according to the ECC correction code decoder, judges the method for flaw block.Utilize the threshold value of setting amount of error, the decoding error amount is lower than threshold value, directly be judged to be non-flaw block.And the decoding error amount is higher than threshold value, and directly be judged to be flaw block, save correction time, to improve CD-ROM drive usefulness.
Yet the decoding error amount threshold value of this decision procedure is difficult to accurate setting.Threshold value is established too low many flaw blocks that then cause, and not only reduces the effective storage volume of discs, and needs burning data again, increases recordable time.Threshold value establish too high then easily with data burning at flaw block, and can't read the data of storage.In addition, aforementioned prior art reading of data block also needs through the ECC correction code decoder, could judge flaw block according to the decoding error amount, not only can increase recordable time equally, and the amount of error of ECC correction code decoder, may be the mistake of codec format, be not the mistake that the data mark reads, and can't directly represent defect level.Therefore, known optical disc sheet flaw block decision method still has problem to need to be resolved hurrily on the process of judging.
Summary of the invention
The object of the present invention is to provide a kind of disk defect block decision maker, directly compare former modulation voltage position signal before regeneration modulation voltage position signal and the burning by comparing unit, the amount of error of generation is as the benchmark of judging flaw block, with raising burning usefulness.
Another object of the present invention is to provide a kind of disk defect block decision method, utilize comparison, directly obtain the block defect condition, to quicken to judge flaw block without modulation voltage position signal before and after the decoding burning.
A further object of the present invention is to provide a kind of disk defect block decision method, be divided into high, medium and low three classes by amount of error with block, to high amount of error, directly judge flaw block, low amount of error then directly is judged to be non-flaw block, and for the correction of decoding again of middle amount of error, and according to its actual decoded results as judgement, improve and judge accuracy.
In order to reach the purpose of aforementioned invention, disk defect block decision maker of the present invention receives burning data and order by processor, and burning data is stored in storer.Burning data is formed coded digital signal through the ECC correcting code, form former modulation voltage position signal through modulating device again, deposit back storer.Processor is controlled the read head burning or is read modulation voltage position signal, utilizes the comparing unit comparison amount of making mistake, and judges flaw block according to amount of error.
A kind of disk defect block decision method of the present invention at first reads the block of burning, forms regeneration modulation voltage position signal; Former modulation voltage position signal before comparison regeneration modulation voltage position signal and the burning is with the person's of not being inconsistent miscount amount; Check that amount of error is low amount of error, middle amount of error or high amount of error, low amount of error directly is judged to be non-flaw block, and high amount of error directly is judged to be flaw block, then carries out decoding for middle amount of error, decode and successfully be judged to be non-flaw block, the decoding failure then is judged to be flaw block.
Description of drawings
Fig. 1 is the process flow diagram of prior art disk defect block decision method.
Fig. 2 is the calcspar of disk defect block decision maker of the present invention.
Fig. 3 is the process flow diagram of first embodiment of the invention disk defect block decision method.
Fig. 4 is the process flow diagram of second embodiment of the invention disk defect block decision method.
[main element label declaration]
10 CD-ROM drives
11 processors
12 storeies
13 ECC correcting codes
14 modulating devices
15 read heads
16 comparing units
17 coded digital signals
18 modulation voltage position signals
19 discs
Embodiment
Relevant the present invention is for reaching above-mentioned purpose, and technological means that is adopted and effect thereof are lifted preferred embodiment now, and cooperate graphic be illustrated as follows.
Please refer to Fig. 2, be CD-ROM drive 10 calcspars of utilization disk defect block decision maker of the present invention.CD-ROM drive 10 comprises processor 11, storer 12, ECC correcting code 13, modulating device 14, read head 15 and comparing unit 16.Mainly receive the burning data and the order of main frame, burning data is stored in the storer 12 by processor 11.Utilize ECC correcting code 13 again, the coded digital signal 17 with burning data coding formation ECC correcting code 13 specific formats is temporarily stored in the storer 12.Then utilize modulating device 14, used 8-14 sign indicating number modulating device (the Eight-Fourteen Modulation of DVD discs for example, be called for short EFM), with the modulation voltage position signal 18 of the temporary longer unit of coded digital signal 17 mixed insertion special codes formation, deposit back storer 12 again as the former modulation voltage position signal 18 before the burning.Read head 15 is read the former modulation voltage position signal 18 in the storer 12 then, and utilizes the data mark of the different unit interval length of 3T-11T, forms a plurality of unit data blocks (Sector), and burning is on discs 19.
During the whether correct reading of data of checking burning, read the data mark of discs, form the modulation voltage position signal 18 of regeneration, be temporarily stored in storer 12 by processor 11 control read heads 15.Disk defect block decision maker of the present invention, before regeneration modulation voltage position signal 18 is without 13 decodings of ECC correcting code, utilizing comparing unit 16, is unit with the block, and the modulation voltage position signal 18 of directly will regenerating compares with the former former modulation voltage position signal 18 that is stored in back storer 12.Be as the criterion with former modulation voltage position signal 18, the data mark signal person of not being inconsistent of comparison regeneration modulation voltage position signal 18 is a mistake, and the accumulative total amount of error, with the amount of error of each block regeneration modulation voltage position signal 18 of quick acquisition.Because this amount of error is directly represented the situation of burning failure, the number of each block amount of error is as the quality of representing discs 19 place block.Therefore, whether processor 11 of the present invention is the index of defective with the amount of error of signal 18 comparisons in modulation voltage position before and after the burning as the assessment data block.
Therefore, disk defect block decision maker of the present invention, can pass through comparing unit, direct regeneration modulation voltage position signal with the reading of data mark, compare with the former modulation voltage position signal that stores before the burning, do not need correcting code, obtain the amount of error that comparison is not inconsistent fast via ECC, as judging flaw block, to improve burning CD ROM usefulness.
Disk defect block decision method of the present invention, it is regeneration modulation voltage position signal 18 with the reading of data block, compare former modulation voltage position signal, the amount of error that is produced is divided into high, normal, basic three classes, and the damage of representative data block is serious, medium or slight extent respectively.Block for high amount of error, just the data mark damages more serious block, because of amount of error many, generally the meeting via the ECC correcting code causes the decoding failure, can't finish reading of data, or expend too much decoding correction time, and classify the block that needn't carry out the ECC correcting code again as, directly be judged to be flaw block.And for the block of hanging down amount of error, just the data mark damages slighter block, because of amount of error is few, all can successfully decodes through the ECC correcting code and to finish reading of data, also classify the block that to carry out the ECC correcting code again as, directly be judged to be non-flaw block.
Owing to the block of middle amount of error, mostly be and mix and as classifying flaw block entirely as, will reduce the storage volume of discs, and as classifying non-flaw block as entirely, will cause afterwards can't reading of data through the block of success of ECC correction code decoder or decoding failure.Disk defect block decision method of the present invention, be via carrying out the ECC correcting code with the block of middle amount of error, the result who decodes successfully or fail according to reality again, whether the decision data block is flaw block, the block of amount of error is judged by mistake in can avoiding.
As shown in Figure 3, be the flow process of first embodiment of the invention disk defect block decision method.The present invention judges that whether the burning data block is that the step-by-step procedures of disk defect block is as follows: at first at step R1, begin to judge flaw block.Enter step R2, read the block of burning on the discs, form regeneration modulation voltage position signal.Enter step R3 again, former modulation voltage position signal fusing before the modulation voltage of will regenerating position signal and the burning.At step R4, be as the criterion with former modulation voltage position signal, check the regeneration modulation voltage position signal person of not being inconsistent, form rub-out signal and miscount amount.Then enter step R5,, amount of error is sorted in low amount of error, middle amount of error or high amount of error according to the number of amount of error.
To the block of slight damage, enter step R6, be categorized as low amount of error.Enter step R7 again, directly the decision data block is non-flaw block, does not carry out the ECC correcting code.To the badly damaged block, enter step R8, be categorized as high amount of error.Enter step R9 again, directly the decision data block is a flaw block, does not carry out the ECC correcting code.To the block of medium damage, enter step R10, be categorized as middle amount of error.Enter step R11 again, directly carry out the ECC correcting code, judge the flaw block state according to the result who decodes successfully or fail.Step R7, step R9 and step R11 judge finish after, enter step R12 at last, finish to judge.
As shown in Figure 4, be the flow process of second embodiment of the invention disk defect block decision method.Present embodiment for practice of the present invention in the checking burning data block correct process of burning whether, step-by-step procedures is as follows: at first at step S1, CD-ROM drive receives Host Command checking institute burning data, and whether burning is correct.Enter step S2, read the desired burning data block of checking, form regeneration modulation voltage position signal.Enter step S3 again, former modulation voltage position signal fusing before the modulation voltage of will regenerating position signal and the burning.At step S4, be as the criterion with former modulation voltage position signal, check the regeneration modulation voltage position signal person of not being inconsistent, form rub-out signal and miscount amount.Then enter step S5,, be categorized into three class block such as low amount of error, middle amount of error and high amount of error according to the number of amount of error.
Then, enter step S6 and check that the classification among the step S5 is the block of middle amount of error? if the block of amount of error in non-, then enter step S7, do not carry out the ECC correction code decoder, direct height according to the amount of error classification, judge the flaw block state according to setting, promptly low amount of error directly is judged to be non-flaw block, and high amount of error directly is judged to be flaw block.If the block of amount of error in being categorized as, then enter step S8, the block of middle amount of error is carried out the ECC correction code decoder, enter step S9 again and check whether decoding successful? according to decoded results, if decode successfully, just enter step S10 and be judged to be non-flaw block, if the decoding failure just enters step S11 and is judged to be flaw block.Step S7, step S10 or step S11 judge finish after, do does entering step S12 check and verify desired burning data and reads and finish? do not finish if read as yet, be back to step S2 and continue to read burning data, finish if read, then enter step S13, finish program verification.
Therefore, disk defect block decision method of the present invention just can utilize the modulation voltage position signal of burning front and back without decoding, compares, and directly obtains the shown defect level of block amount of error, quickens to judge flaw block.And be divided into three classes by amount of error with data, to high amount of error, directly judge flaw block, low amount of error then directly is judged to be non-flaw block, and proofread and correct for the decoding that middle amount of error is taken time again, result according to reality is decoded successfully or failed correctly judges flaw block, reaches to improve the purpose of judging accuracy.
The above person, only in order to convenient explanation preferred embodiment of the present invention, scope of the present invention is not limited to these preferred embodiments, and is all according to any change that the present invention did, and in not breaking away under the spirit of the present invention, all belongs to the scope of claim of the present invention.
Claims (9)
1. disk defect block decision maker comprises:
Processor receives burning data and order;
Storer stores this burning data;
ECC correcting code device is with the coded digital signal of this burning data coding formation specific format in the storer;
Modulating device forms former modulation voltage position signal with this coded digital signal, and is stored in storer;
Read head is subject to processing device control, and this former modulation voltage position signal of burning becomes the data mark of unit data block, or reads this data mark one-tenth regeneration modulation voltage position signal; And
Comparing unit, this regeneration modulation voltage position signal of comparing this block and this former modulation voltage position signal, generation amount of error;
Wherein, this processor judges according to the amount of error of this comparing unit comparison whether this block is flaw block.
2. disk defect block decision maker according to claim 1, wherein this coded digital signal is temporarily stored in this storer.
3. disk defect block decision maker according to claim 1, wherein this regeneration modulation voltage position signal that reads is temporarily stored in this storer.
4. disk defect block decision maker according to claim 1, wherein this modulating device is a 8-14 sign indicating number modulating device.
5. disk defect block decision method, its step comprises:
(1) reads the block of burning, form regeneration modulation voltage position signal;
(2) former modulation voltage position signal before comparison regeneration modulation voltage position signal and the burning is with the person's of not being inconsistent miscount amount;
(3) check that amount of error is low amount of error, middle amount of error or high amount of error,,, judge the flaw block state according to the result who decodes successfully or fail if then carry out decoding for middle amount of error if be that high and low amount of error is then directly judged the flaw block state according to setting.
6. disk defect block decision method according to claim 5, wherein this step (3) directly judges then that this block is a flaw block if amount of error judges directly then that for low amount of error this block is non-flaw block if amount of error is high amount of error.
7. disk defect block decision method according to claim 5, after wherein amount of error is carried out decoding in this step (3), check the success of decoding? if decode successfully, the decision data block is non-flaw block, and the decision data block is a flaw block if decoding is failed then.
8. disk defect block decision method according to claim 5, wherein this step (3) is carried out is decoded as the ECC correcting code.
9. disk defect block decision method according to claim 5, wherein whether burning is correct for checking burning data block for this decision method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101321367A CN101872636B (en) | 2009-04-21 | 2009-04-21 | Flaw block judging device and method for optical discs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101321367A CN101872636B (en) | 2009-04-21 | 2009-04-21 | Flaw block judging device and method for optical discs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101872636A CN101872636A (en) | 2010-10-27 |
| CN101872636B true CN101872636B (en) | 2011-10-26 |
Family
ID=42997436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101321367A Expired - Fee Related CN101872636B (en) | 2009-04-21 | 2009-04-21 | Flaw block judging device and method for optical discs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101872636B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268767B (en) * | 2013-05-08 | 2015-09-23 | 广东欧珀移动通信有限公司 | The height control of laser pick-up unit of optical of optical disc player |
| CN111984291B (en) * | 2020-08-12 | 2024-05-24 | 深圳创维－Rgb电子有限公司 | Data burning method, device, terminal and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6175459B1 (en) * | 1997-12-01 | 2001-01-16 | Fujitsu Limited | Magnetic disk drive with a disk medium defect detector and read channel IC used in the drive |
| CN1815615A (en) * | 2004-12-07 | 2006-08-09 | 三星电子株式会社 | Device and method for confirming defect area on optical media |
-
2009
- 2009-04-21 CN CN2009101321367A patent/CN101872636B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6175459B1 (en) * | 1997-12-01 | 2001-01-16 | Fujitsu Limited | Magnetic disk drive with a disk medium defect detector and read channel IC used in the drive |
| CN1815615A (en) * | 2004-12-07 | 2006-08-09 | 三星电子株式会社 | Device and method for confirming defect area on optical media |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-339738A 2005.12.08 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101872636A (en) | 2010-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2007110587A (en) | METHOD AND DEVICE FOR MONITORING DEFECTS IN RECORDING MEDIA AND RECORDING MEDIA WITH DEFECT CONTROL OBTAINED USING THIS METHOD | |
| CN100412979C (en) | Method and apparatus for error code correction | |
| US20050175323A1 (en) | Data recording method and data recording device | |
| US5471351A (en) | Method and apparatus of verifying accurate writing through comparisons of written and read data | |
| CN101872636B (en) | Flaw block judging device and method for optical discs | |
| US20100238779A1 (en) | Device and method for determining defect sector on optical disc | |
| CN101165799A (en) | Defect detection system and method | |
| CN101609705B (en) | Apparatus and method for writing code data into storage medium | |
| TWI302300B (en) | Apparatus and method for defect management of optical disks | |
| JP2001351341A (en) | Confirmation method for deficiency management area information of optical disk at the time of initialization to be verified and testing device therefor | |
| US7145852B2 (en) | Method and apparatus for decoding encoded data around a linking area on an optical storage medium | |
| US6738943B1 (en) | Apparatus and method for counting errors in an optical compact disc storage system | |
| KR100566554B1 (en) | A codeword for use in digital optical media and a method of generation thereof | |
| JP2000132903A (en) | Apparatus and method for correcting data error | |
| JPH1050005A (en) | Method for managing defect on optical disk and device therefor | |
| JP2589378B2 (en) | Magneto-optical disk processing unit | |
| JP2615980B2 (en) | Magneto-optical disk drive | |
| US20090259891A1 (en) | Defect detection apparatus for optical disc and method thereof | |
| CN1855274B (en) | Disk defect managing device and method | |
| KR100246478B1 (en) | Apparatus for defect management area list generating and method of the same | |
| JP2001118340A (en) | Device and method for recording and reproduction and recording medium | |
| US7881167B1 (en) | Systems and methods of shock recovery in writable optical disc systems | |
| CN102750965B (en) | Reading method and driving circuit | |
| WO2007000707A2 (en) | A method and system for protecting data stored on an optical disc | |
| CN100380499C (en) | Method for collecting broadcast data file in single control chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111026 Termination date: 20120421 |