CN1298180A - CD machine data error corrector - Google Patents
CD machine data error corrector Download PDFInfo
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- CN1298180A CN1298180A CN 99125531 CN99125531A CN1298180A CN 1298180 A CN1298180 A CN 1298180A CN 99125531 CN99125531 CN 99125531 CN 99125531 A CN99125531 A CN 99125531A CN 1298180 A CN1298180 A CN 1298180A
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Abstract
In the CD decoder structure comprising serially connected phase lock loop, sync signal detector, demodifier, cross code decoder and data filler, one error classifier and one error flag generator are set between the cross code decoder and data filler. The error classifier analyzes errors in data and triggers the error flag generator based on the analysis result, and the error flag generator produces control signal to trigger the filler to repair. In case of serious errors in the data on CD, the CD may be repaired through error analysis and repair and the data may be recombined to approach the initial state.
Description
The present invention relates to the repair apparatus in a kind of instrument field Digital Data Processing Equipment, particularly relate to a kind of CD machine data error corrector.It mainly is a kind of for improving analysis ability and the data repair efficiency not good shortcoming of compact disc decoder device for a large amount of wrong clumps wrong (Burst Error), but and be the type that a kind of look-ahead analysis makes mistake, produce extra repairing flag signal controlling signal then respectively according to the difference of type, reach preferable data and repair or fill up effect, making data reassemble into kenel near source book, and order changes by mistake the unlikely excessive deterioration of rate (MISCORRECTION RATE).
The difference of laser disc pressed-disc technique and producer differ for the laser disc product quality requirement now, and therefore various wrong generations are arranged sometimes.It generally is the mistake of random error (random error) and the big block of clump wrong (burst error) with fault discrimination.This mistake can moderately be corrected or be corrected by the interleaved code demoder in the compact disc decoder device (CIRC DECODER), below promptly roughly just existing traditional compact disc decoder device make a presentation.
Seeing also shown in Figure 7ly, is the calcspar of existing traditional compact disc decoder device, and the NRZI data of reading from laser disc is except the PCM data RFDATA that is converted to 16 bits, also in regular turn by a phase-locked loop 91 (DATA SLICER ﹠amp; RECOVERY), sync signal detector 92 (SYNCHRONOUS PATTERN DETECTION), 14 change the demodulator 93 (14-8DEMODULATOR) of 8 bits, interleaved code demoder 94 (CIRC DECODER), and data fills up device 95 (DATACONCEALMENT), just sends decoded actual data at last.Because the data that writes on the CD-RW discsCD-RW has been considered the problem of error correction, data is staggered mode arranges, and discontinuous serial shape is convenient in the subsequent regeneration decoding process to reach, corrigendum according to this or correction.So the interleaved code demoder 94 in aforementioned circuit (CIRC DECODER) is for to include outside the demoder of release of an interleave sign indicating number, also can detect wrong position and the quantity that takes place simultaneously, and can in time be corrected or be corrected by built-in corrector in the lump, be reached the effect of recovery data.And for interleaved code demoder thus 94 corrigendum in good time or the data that correct, then fill up in the device 95 by triggering repairing flag flag signal a to data of next stage, carry out the operation that data is repaired or filled up to notify this data to fill up device 95, this data is filled up device 95 and is carried out " interpolation " for the data zone of desiring to repair and (interpolation) handle, also be this position that lacks data insert one equal before and after " the false data " of mean value of amplitude of data, to reach the so-called effect of repairing or filling up.
Aforesaid data is filled up the kenel that device 95 inserts false data, for only being arranged, the wrong fashion of a small amount of can accept, and for the clump wrong (burst error) of big boxed area, the data in the middle bulk zone shown in Fig. 5 A disappears without reason and forms a defect area (Defect), and two waveforms shown in Fig. 6 A are improper staggered and form under two kinds of different wrong kenels of clump of an ecotone (Interrupt), aforementioned existing traditional interpolation processing mode, all directly averaging value interpolation according to the front and back data handles, like this when the defective in the big zone of Fig. 5 A is handled, insert one quite wide and remain on horizontal line a little more than datum line.This measure causes output waveform unusual, when the staggered situation of the waveform in the big zone of Fig. 6 A is handled, then is converted to the mean value waveform of two waveforms in these zone errors, and this kind processing mode is also non-suitably.Because the overlapping staggered mistake of this kind two waveforms, the general data mistake that few part is only arranged, aforementioned existing traditional mode is not considered various situations and is all revised with interpolation method, then cause the rate that changes by mistake (misscorrection rate) in this whole zone significantly to raise, cause the probability of correcting mistakes to heighten, so existing traditional compact disc decoder is constructed situation not good to the repairing ability of clump mistake (Burst Error) problem and that cause the rate that changes by mistake to worsen easily, truly has necessity of being improved.This shows that above-mentioned existing compact disc decoder device still has many defectives, and the assistant officer waits to be improved.
Because the defective that above-mentioned existing compact disc decoder device exists, the inventor actively study innovation based on abundant practical experience and professional knowledge, through constantly studying, design, and after studying sample and improvement repeatedly, creates the present invention finally.
Fundamental purpose of the present invention is, overcome the defective that existing compact disc decoder device exists, and provide a kind of CD machine data error corrector of new structure, it is mainly filled up in interleaved code demoder and data set up one clump of misclassification device and one clump of wrong flag generator between the device, can be classified to wrong kenel by this clump misclassification device, then according to this sorting result, make the wrong flag generator of clump send the wrong flag signal of repairing of clump of different kenels, reach wrong data is carried out more suitable repairing or filled up, to reassemble near the kenel of source book and to prevent that the rate of changing by mistake from excessively worsening.
Of the present invention time a purpose is, a kind of CD machine data error corrector is provided, make this clump misclassification device by being constituted with comparer and logic gate, when taking place by judgement outer code error flag (outer-codeerror), the continuity whether this inner code error flag (inner-code error) takes place and take place analyzes the wrong type of clump.
Another object of the present invention is to, a kind of CD machine data error corrector is provided, make the wrong flag generator of this clump for constituting with the counter or the memory body of tabling look-up, and when clump misclassification device is sent into different type signals, send the wrong flag of clump of different types and repair signal, and can carry out repairing in various degree or fill up data.
Another purpose of the present invention is, a kind of CD machine data error corrector is provided, make the wrong flag generator of this clump carry out the repairing of " trapezoidal " curve, form a kind of repair efficiency of recombinating out that reaches near source book to the wrong zone of clump that is regarded as defective (defect).
A further object of the present invention is, a kind of CD machine data error corrector is provided, make the wrong flag generator of this clump carry out the repairing of " triangle " curve for the wrong zone of clump to be considered as interlocking (interrupt), with the repairing method that increases progressively Yu successively decrease, be divided into two sections of front and back with this repairing method for making interlaced area, preceding half section source book of continuing to use leading portion, the second half section is continued to use the source book of back segment, also can reach the effect of recombinating out, and can prevent to change by mistake rate and worsen near source book.
The objective of the invention is to realize by following technical scheme.A kind of CD machine data error corrector according to the present invention's proposition, with the phase-locked loop, the sync signal detector, demodulator, interleaved code demoder and data are filled up device and are connected in series formation compact disc decoder structure in regular turn, it is characterized in that it has: one clump of misclassification device, it is arranged on interleaved code demoder output, constitute with comparer and logic gate, the input end of comparer is connected with the inner code error flag signal output end of aforementioned interleaved code demoder, and comparer is exported the selection signal for the serial connection logic gate, and the input end of logic gate is connected with the outer code error flag signal of interleaved code demoder; One clump of wrong flag generator, this generator constitutes with the memory body of tabling look-up, and its input end is connected with the selection signal output end of clump misclassification device, and the repairing flag input end that the output terminal of clump wrong flag generator is with aforesaid data is filled up device is connected.
Purpose of the present invention can also further realize by following technical measures.Aforesaid CD machine data error corrector, the wrong flag generator of wherein said clump is made of counter.
The present invention compared with prior art has tangible advantage and good effect.By above technical scheme as can be known, the present invention fills up in interleaved code demoder and data to set up one clump of misclassification device and one clump of wrong flag generator between the device, can be classified to wrong kenel by this clump misclassification device, then according to this sorting result, make the wrong flag generator of clump send the wrong flag signal of repairing of clump of different kenels, can reach wrong data is carried out more suitable repairing or filled up, to reassemble near the kenel of source book and can prevent that the rate of changing by mistake from excessively worsening; Wherein, this clump misclassification device is by being constituted with comparer and logic gate, and when taking place by judgement outer code error flag, the continuity whether this inner code error flag takes place and take place analyzes the wrong type of clump; The wrong flag generator of this clump is for constituting with counter or the memory body of tabling look-up, and when clump misclassification device is sent into different type signals, sends the wrong flag of clump of different types and repair signal, and can data be carried out repairing in various degree or filled up; The wrong flag generator of this clump carries out the repairing of step curve to the wrong zone of clump that is regarded as defective, can form a kind of repair efficiency of recombinating out near source book that reaches; Moreover the wrong flag generator of this clump is for carrying out the repairing of triangle curve to the wrong zone of clump that is considered as interlocking, with the repairing method that increases progressively Yu successively decrease, be divided into two sections of front and back with this repairing method for making interlaced area, preceding half section source book of continuing to use leading portion, second half section is continued to use the source book of back segment, also can reach the effect of recombinating out, and can prevent to change by mistake rate and worsen near source book.
In sum, the present invention mainly is a kind of can being in the data on the CD-RW discsCD-RW under the situation of gross error, can analyze and carries out different repairings according to the type of mistake, makes data reassemble into error corrector near source book.Fill up in interleaved code demoder (CIRC DECODER) and data one clump of misclassification device and one clump of wrong flag generator are set between the device (DATA CONCEALMENT), this clump misclassification device is for to carry out the analysis of type of error to data, and then the result that foundation is analyzed triggers the wrong flag generator of clump, produce for triggering this and fill up the controlling signal that device is repaired, make this fill up device and carry out the data repairing work according to the output state of the wrong flag generator of clump.It can improve the compact disc decoder device for wrong analysis ability and the not good shortcoming of data repair efficiency of a large amount of wrong clumps, but and the type that look-ahead analysis makes mistake, produce extra repairing flag signal controlling signal then respectively according to the difference of type, reach preferable data and repair or fill up effect, making data reassemble into kenel, and can make the unlikely excessive deterioration of the rate of changing by mistake near source book.No matter it structurally or bigger improvement is all arranged on the function, and have large improvement technically, and produced handy and practical effect, and have the effect of enhancement really, thereby be suitable for practicality more, really is a new and innovative, progressive, practical new design.
Concrete structure of the present invention is provided in detail by following examples and accompanying drawing thereof.
Fig. 1 is the calcspar of compact disc decoder device of the present invention.
Fig. 2 is a schematic internal view of the present invention.
Fig. 3 is an inside and outside sign indicating number decoding sequence distribution schematic diagram of the present invention.
Fig. 4 is an action flow chart of the present invention.
Fig. 5 A is the waveform synoptic diagram of deficiency clump mistake.
Fig. 5 B is the synoptic diagram of deficiency clump mistake and decoding sequence.
Fig. 5 C is the repairing curve map of deficiency clump mistake of the present invention.
Fig. 5 D is the repairing sequential chart of deficiency clump mistake of the present invention.
Fig. 6 A is the wrong waveform synoptic diagram of staggered clump.
Fig. 6 B is the synoptic diagram of staggered clump mistake and decoding sequence.
Fig. 6 C is the wrong repairing curve map of staggered clump of the present invention.
Fig. 6 D is the wrong repairing sequential chart of staggered clump of the present invention.
Fig. 7 is the calcspar that has traditional compact disc decoder device now.
Below in conjunction with accompanying drawing and preferred embodiment, to its concrete structure of CD machine data error corrector, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
See also shown in Figure 1, CD machine data error corrector of the present invention, it mainly is that interleaved code demoder 94 in existing traditional compact disc decoder device and data are filled up and be provided with one clump of misclassification device 10 and one clump of wrong flag generator 20 between the device 95, repair accordingly to reach according to dissimilar clump mistakes, obtain preferable repair efficiency, and can prevent the unlikely deterioration of the rate of changing by mistake.Its inside as shown in Figure 2, this clump misclassification device 10 inside with comparer 12,13 with 14,15 compositions of door, the wrong flag generator 20 of clump can be made of the counter or the memory body of tabling look-up.The input end of the comparer 12,13 of clump misclassification device 10 is connected with a wrong flag counter 11, this counter is arranged in existing traditional interleaved code demoder 94, and wrong flag counter 11 is connected with an inner code error flag (inner-code error) signal.So, can add up the quantity that the ISN flags make a mistake by wrong flag counter 11, and deliver in the comparer 12,13 of aforementioned clump misclassification device 10, whether 12 detectings of one comparer continuous inner code error takes place, and another comparer 13 has judged whether that then inner code error takes place.Two comparers 12,13 output is warp and door 14 respectively, 15 and send the selection signal A that represents defective (DEFECT) or staggered (INTERRUPT), B is to the wrong flag generator 20 of clump, this clump misclassification device 10 is more exported has one for the trigger signals C (TRIGGER) that triggers the wrong flag generator 20 of this clump, be under the triggering state at this trigger signals C, the wrong flag generator 20 of clump can be sent the different wrong flag signals of repairing of clump of pattern of repairing according to selecting signal A or B to the end drawing below or door 21, or the other end of door 21 is for receiving original repairing flag signal, fill up in the device 95 by this or the door 21 existing data that are fed through the compact disc decoder device again, make it carry out extra repairing and handle, to reassemble into kenel near source book to data.And aforementioned being positioned at clump misclassification device 10 be connected with outer code error flag (outer-codeerror flag) signal with another input end door 14,15, makes this clump misclassification device 10 only just move when outer code error.
Clump misclassification device 10 of the present invention is mainly the state with reference to ISN flag (inner-code flag), tells the wrong type of clump according to this, below describes for the kenel summary to the laser disc coding.See also shown in the decoding sequence synoptic diagram of the inside and outside sign indicating number of Fig. 3 laser disc of the present invention, because the laser disc data is for forming the characteristic that can correct and reduce, all be the multi-layer coding kenel, its ground floor coding promptly is referred to as " ISN " (inner-code), this ISN is vertical adjacent arrangement and forms, and the second layer is laterally and adjacent from top to bottom arrangement, is called " outer sign indicating number " (outer-code).One ISN flag (inner-codeflag) is arranged simultaneously, and each bit in this flag is represented the data correctness of each ISN section respectively, if corresponding ISN flag is 0, and for code data in representing is correct, if 1, then represent the wrong generation of ISN.The present invention promptly uses the situation that this ISN flag takes place to differentiate the wrong type of clump according to this, and then the processing of being correlated with.The present invention can cooperate and consult shown in Fig. 4 action flow chart of the present invention the classification and the processing mode of clump mistake.The decoding process of sign indicating number (outer-code) outside in this drawing, only showing, and the decoding process of ISN (inner-code) only moves for the decoding of carrying out ISN and carries out ISN and correct under corrigible state.If can't correct, then send inner code error flag signal.Because this partly is not an emphasis of the present invention, so will not illustrate in this omission.And in the motion flow of outer-decoder, at first carry out the decoding of outer sign indicating number, when if outer yard correction failure takes place, promptly enter the flow process of drawing below, if the accumulated quantity of judging inner code error is more than or equal to (looking different require and also can be made as different quantity) under 4 the state, promptly be considered as taking place " deficiency clump mistake ", carry out " deficiency repairing " so trigger the wrong flag generator of clump, and send corresponding clump mistake and repair flag, fill up device 95 with the data of notifying Fig. 1 and repair processing accordingly, if judge that the accumulative total numerical value of inner code error equals zero or allow quantity less than maximum correction of outer sign indicating number, promptly be considered as taking place " staggered clump is wrong ", then the wrong flag generator of order clump carries out " staggered repairing ", and wrong flag to the data of Fig. 1 of repairing of clump of dynamically sending another kind of pattern fills up in the device 95, repairs and handles to carry out the wrong data of staggered clump.If not belong to aforementioned two kinds of situations, can carry out data according to existing traditional mode and correct, and make the repairing flag equal zero, that is: notify follow-up data to fill up device 95 data that need not to carry out and repair.
With the motion flow of aforementioned Fig. 4 as can be known, the present invention then analyzes the type that the clump mistake takes place according to this, and individually handles according to the difference of type again when outer sign indicating number taking place correct failure according to the accumulated quantity of inner code error.The present invention reaches according to the wrong type that takes place and carries out suitable repairing and handle for produce the different wrong flag signals of repairing of clump of repairing curves by one clump of wrong flag generator, recombinating out near the kenel of source book, and avoids changing by mistake rate and worsens.
Below describe in detail at the wrong and staggered clump of deficiency clump wrong basic kenel and repairing method of the present invention.See also shown in Fig. 5 A and Fig. 6 A, represent the wrong summary pattern of the wrong and staggered clump of deficiency clump respectively, when showing, shown in Fig. 5 B and Fig. 6 B with decoding sequence (decode sequence).Represent in the example of deficiency clump mistake that at Fig. 5 B the zone line of decoding sequence produces big block mistake; In the wrong example of the staggered clump of the expression of Fig. 6 B, all be considered as whole mistakes in the second half section zone in monoblock zone.Middle section at Fig. 5 B is mistake, and the ISN flag of each file of respective regions (inner-code flag) also is under the situation of continuous mistake, promptly be considered as described above taking place " deficiency clump mistake ", and in legend, can find a phenomenon: when sign indicating number is exported outside carrying out, be to carry out the output of each sequence data with the angle of inclination shown in the dotted line shown in drawing.Shown in this figure, first sequence of S0 sequence only in the end a character fall into this zone errors, last 2 characters of S1 sequence make a mistake.Class is advanced according to this, and at S22～S24 sequence place, then changes only preceding half core dumped into, and the second half section is correct.So should summarize and this take place when wrong, the mistake in the leading portion of zone errors and latter end position is and increases progressively or successively decrease.Therefore, the repairing that the present invention adopts the trapezoidal repairing curve shown in Fig. 5 C to carry out data is handled, and S0 is the sequence address of the wrong beginning of expression, and Sn is the wrong sequence location that finishes of expression, the length of by-level line is then decided on wrong number, and its relevant timing waveform is shown in Fig. 5 D.Because the length of complete sequence is very long, so divide into multistage, each section from top to bottom is that the sign indicating number frame is numbered promptly in regular turn: sequence, character numbering, and the wrong flag of repairing of the clump that the present invention produced.By the wrong state of repairing flag of clump as can be known, in regular turn to 23 characters of S0,22～23 characters of S1,21～23 characters of S2 carry out the repairing of incremental, then carry out the repairing of whole character 0-23 at the S23 place, and to the last 24 sequences are then changed into and are successively decreased.0～3 character as the Sn-3 of drawing, 0～2 character of Sn-2,0～1 character of Sn-1, and the 0 character place of Sn is the repairing processing of descending gradually, and this repairing method can have the effect of complete complementation with the wrong kenel of earlier figures 5B, when bringing into play the effect that best repair efficiency also can prevent the unlikely deterioration of the rate of changing by mistake.
Under the relation for the shown generation of Fig. 6 A and Fig. 6 B " staggered clump is wrong ", because the ISN flag of each file of the location of the generation clump mistake in Fig. 6 B does not indicate under the mistake, can judge the partly overlapping mistake of two waveforms about belonging to, be not complete mistake.Therefore, the present invention adopts the mode of the leading portion data of believing last waveform respectively and the back segment data of believing back one waveform to adapt to, the curve of its repairing is repaired curve for using as the triangle of Fig. 6 C, be example with 24 sequences among this figure, so only need to the elasticity change according to need of 24 series processing, vertex of a triangle is positioned at the point midway of whole sequence, shown in the sequential chart of Fig. 6 D, be similar to the aforesaid data that increases progressively and successively decrease and repair kenel, form a kind of leading portion data leading portion and repairing method that keeps back segment data back segment of keeping, reach the correctness that as far as possible keeps data and recombinate out, also have the effect that prevents the improper deterioration of the rate of changing by mistake equally near the effect of source book.
Aforementioned related description is for ease of clearly demonstrating, and only is that one is implemented situation, so the appropriateness adjustment of the parameter that will be correlated with and Rule of judgment should belong to scope of the present invention actually.Of the present invention focusing on can refilter the wrong problem of clump, classification, and conclude, and the data of carrying out character resolution pattern according to the wrong type of clump is repaired processing, make its original appearance that can keep data as best one can and prevent that correct data from revised undeservedly, obtain to reassemble near the effect of source book and prevent to change by mistake rate and worsen.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (2)
1, a kind of CD machine data error corrector is filled up device with phase-locked loop, sync signal detector, demodulator, interleaved code demoder and data and is connected in series formation compact disc decoder structure in regular turn, it is characterized in that it has:
One clump of misclassification device, it is arranged on the output of interleaved code demoder, constitute with comparer and logic gate, the input end of comparer is connected with the inner code error flag signal output end of aforementioned interleaved code demoder, and comparer is exported the selection signal for the serial connection logic gate, and the input end of logic gate is connected with the outer code error flag signal of interleaved code demoder;
One clump of wrong flag generator, this generator constitutes with the memory body of tabling look-up, and its input end is connected with the selection signal output end of clump misclassification device, and the repairing flag input end that the output terminal of clump wrong flag generator is with aforesaid data is filled up device is connected.
2, CD machine data error corrector according to claim 1 is characterized in that the wrong flag generator of described clump is made of counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99125531 CN1124605C (en) | 1999-12-02 | 1999-12-02 | CD machine data error corrector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99125531 CN1124605C (en) | 1999-12-02 | 1999-12-02 | CD machine data error corrector |
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| Publication Number | Publication Date |
|---|---|
| CN1298180A true CN1298180A (en) | 2001-06-06 |
| CN1124605C CN1124605C (en) | 2003-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 99125531 Expired - Fee Related CN1124605C (en) | 1999-12-02 | 1999-12-02 | CD machine data error corrector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114494B (en) * | 2005-10-21 | 2011-11-16 | 联发科技股份有限公司 | Error analysis method and optical disk replay device |
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1999
- 1999-12-02 CN CN 99125531 patent/CN1124605C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114494B (en) * | 2005-10-21 | 2011-11-16 | 联发科技股份有限公司 | Error analysis method and optical disk replay device |
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| CN1124605C (en) | 2003-10-15 |
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Granted publication date: 20031015 Termination date: 20131202 |