CN1007670B - Frror correcting method for optical data recording card - Google Patents
Frror correcting method for optical data recording cardInfo
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- CN1007670B CN1007670B CN 85101774 CN85101774A CN1007670B CN 1007670 B CN1007670 B CN 1007670B CN 85101774 CN85101774 CN 85101774 CN 85101774 A CN85101774 A CN 85101774A CN 1007670 B CN1007670 B CN 1007670B
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Abstract
The present invention relates to an error correcting method for optical data recording cards. Because code words in each code block are respectively delayed in sequence in directions parallel and perpendicular to a recording slot in an optical data recording card and checking code words of error correcting codes are added to information data, a system not only can reliably correct random errors, but also can reliably correct burst errors caused by straight line scratches generated in directions parallel and perpendicular to the card recording slot, namely that the present invention can reliably regenerate information data recorded on the optical card.
Description
The present invention relates to a kind of error correction method of optical data recording card, relate to a kind of error correction method of antiburst error more precisely.
The invention still further relates to a kind of optical recording card record with optical record medium and device that reproduces of making, this optical recording card is by many data recording grooves parallel to each other, form with pit figure (pitpattern) is stored the information data signal that is recorded, so that available optical means is read.
Recently, in such as memory cards such as bank card, credit card, authenticating cards, Optical Networking sheet or optical data note recording card have been developed by the use optical data recording medium as data carrier.Fig. 9 has shown the example of an optical data recording card.Just on the workplace 101 of rectangular card, form a strip region 102 with the card parallel longitudinal with optical data recording medium.In this strip region 102, arrange to have many perpendicular to card longitudinally, and at the track T vertical parallel to each other of card.And then as Figure 10 represents on each track T, go up information signal with the form of so-called bit group record, so that available optical means is read.In Figure 10, together single track T is formed by synchronizing signal part 103 and data division 104, and these two parts of synchronizing signal and data all are that the form with the bit group P that is equivalent to digital signal is recorded on this two part of track T with optical means.
Be recorded in the information on the per pass track in the zone 102 of optical data recording card 100, read by a kind of optical reading device with basic structure shown in Figure 11.In Figure 11, optical recording card 100 owing to be subjected to present main drive shaft that motor 105 drives and pinching of pinch roll 107 and along the longitudinal (direction of arrow A) be fed.A branch of illumination light by light source 111 emissions is irradiated at least one trace record groove T that is arranging in the card strip region 102 by a condenser lens 112.The light that is reflected, promptly track reads light and can be mapped on the optical sensor 114 by object lens 113.Usually a light emitting diode is used as light source 111, yet also can uses a lamp.The linear composite sensing element (photoelectric cell) that optical sensor 114 adopts such as the charge-coupled device (CCD) linear transducer.Project the map on the sensor element, read according to the method for electron scanning.The signal that optical sensor 114 sends (track read output signal) is admitted to controlling of sampling circuit 122 by an amplifier 121.The signal level of sensor element is 122 samplings of controlling of sampling circuit and control thus, sends into the binary circuit 124 that is made of a level Discr. through low-pass filter 123 then.Binary circuit 124 is exported one with the suitable digital signal of bit group P on the track T.This digital signal is admitted to a clock regeneration circuit 125 and a data regenerative loop 126.The clock signal that clock regeneration circuit 125 produces is admitted to the input end of clock of data regenerator 126, then through output terminal 127 outputs.The data-signal that data regenerator 126 produces is from 128 outputs of a lead-out terminal.
In optical data recording card 101,, be stained with dust, the situation that still exists some to make a mistake if be stained with on the card though reliability of recording data generally is high.Routinely, by with one group of CRC(CRC) code data joins one track and detects mistake as a code character or by the dual data that write.Yet, be subjected to scratching indentation on the direction of these methods or perpendicular recording groove parallel and cause under the situation that burst error takes place there is not the effect of error correction at (card).This is to be inserted into card box because work as card, or the monthly ticket box time, or when card stitches insertion by the card insertion of card sensing equipment, card is easy at vertically (perpendicular to track) or the laterally straight scuffing indentation of (being parallel to the track direction) generation, produce at the cut straight owing to these under situation of burst error, it is impossible thinking to produce again correct information data.
Consider these problems, therefore an object of the present invention is a kind of error correction method will be provided, can produce correct information data again and a kind of strong error correcting capability that has will be provided by this method, even can correct because the burst error optical data recording card that the straight line cut on the parallel or vertical card track direction causes.
Another object of the present invention provides a kind of optical recording card record with optical record medium and device that reproduces of making, this optical recording card is by many data recording grooves parallel to each other, form with the pit figure is stored the information data signal that is recorded, so that available optical means is read.
As follows according to the present invention: in a kind of optical recording card in the method characteristics of error correction on the optical recording card, forming the track of multitrace seismogram data on its workplace and on direction, be arranged in parallel perpendicular to track, the bit that each track is read by the available optical means of a row constitutes, these bits are according to digital data record, (1) information data that will write down is divided into some code characters, and these code characters have the number of sharing to the code word of a track; (2) form the check word of first error correcting code, and its information data that is added to each code character is got on; (3) each code word is postponed two or more a plurality of word successively in the direction that is parallel to track, and is being postponed successively together perpendicular to the direction of track or multitrace seismogram groove more; And (4) carry out encoding process by this way, promptly when a code word that will write down arrived an end of this track and back to back code word will be returned and postpone, codeword delay was to realize in the phase place arrangement that is parallel on the track direction by changing code word.
In this error correction method, because encoding process is by in turn postponing each code word and carry out being parallel and perpendicular on the track direction, so just may stably correct a mistake and produce information data again with high reliability, even also can equally correct in the burst error that the cut that is parallel and perpendicular to the track direction causes, certain random error that let alone takes place.
A kind of error correction method on optical data recording card that proposes according to the present invention, because the code word of each code character is delayed respectively successively being parallel and perpendicular on the direction of track, also because added based on check word (or parity word) such as Reed-Solomon (Reed-Solomon) sign indicating number, so it not only can correct random error reliably, and can correct because the burst error that the cut on parallel and vertical card track direction causes so just can produce information data again with high fiduciary level.
According to a kind of optical recording card record with optical record medium and device that reproduces of making of the present invention, it is characterized in that comprising:
One is used to produce the information data source that will be recorded in the described information data information on each described data recording groove;
Be used to show the device of first and second error correcting codes;
A code device comprises: produce check code word according to described first error correcting code, and described check code word is added to first scrambler on the output signal of described information data source; The output signal of described first scrambler is carried out the first encoding process circuit of first encoding process; Produce check code word according to described second error correcting code, and described check code word is added to second scrambler on the output signal of the described first encoding process circuit; And the second encoding process circuit of the output signal of described second scrambler being carried out second encoding process; The described first encoding process circuit comprises the device of arranging code word, make each code word postpone two code words along data recording groove direction, and along direction delay K bar track perpendicular to the data recording groove, wherein K is an integer, when the described code word that arrives data recording groove end will be around to the other end, and when being delayed, described code word is placed on its phase place moves past the code word number of a code word from the initial code number of words of code character position, then each code word is postponed two code words along data recording groove direction, the described second encoding process circuit comprises the device that is used to arrange each code word, make each code word postpone two code words along this data recording groove direction, and the edge is perpendicular to this data recording groove, and opposite direction postpones K bar track during with described first encoding process, wherein K is an integer, when the code word that arrives data recording groove end will be around to the other end, and when being delayed, described code word is placed on its phase place moves past the position of the code word number of a code word, then each code word is postponed two code words along data recording groove direction from the initial code number of words of code character;
A reader that is used for described optical recording card; And
A code translator, comprise the second decoding treatment circuit, be used for the output signal execution of described reader is handled corresponding to second decoding of described second encoding process, second code translator is used for the output signal execution of the described second decoding treatment circuit is handled corresponding to second error check of the described second error check sign indicating number; The first decoding treatment circuit is used for the output signal execution of described second code translator is handled corresponding to first decoding of described first encoding process; And first code translator, be used for the output signal of the described first decoding treatment circuit carried out corresponding to first error check of the described first error check sign indicating number and handle; The described first and second encoding process circuit comprise first random access memory, are used to store by adding check code word carried out the data that the error check sign indicating number is handled, and are used for second random access memory of encoding process; First ROM (read-only memory) is used to produce the write address that writes described second random access memory; And first counter device, be used to described first random access memory and described first ROM (read-only memory) to produce and read the address; The described first and second decoding treatment circuits comprise the 3rd random access memory that is used to store sense data; Be used to decipher the 4th random access memory of processing; Be used to second ROM (read-only memory) that writes described the 4th random access memory and produce write address; And be used to and read from described the 3rd random access memory and described second ROM (read-only memory) and produce second counter device of reading the address.
Fig. 1-6 represents first kind of embodiment of the present invention; Fig. 1 is with the chart of helping explain first step encoding process process; Fig. 2 is with the chart of helping explain the second step encoding process process; Fig. 3 is the schematic diagram of a scrambler; Fig. 4 has represented the calcspar and the encoding process circuit of scrambler among Fig. 3; Fig. 5 is the principle calcspar of code translator; Fig. 6 has represented the principle calcspar of decoding treatment circuit among Fig. 5; Fig. 7 and Fig. 8 represent second kind of embodiment of the present invention; Fig. 8 is the principle calcspar of code translator; Fig. 9 is the planimetric map of optical data recording card; Figure 10 is the figure that specifies of one track; Figure 11 represents an example of optical pick-up device.
The optimum embodiment of the optical data recording card error correction method that the present invention is proposed describes below with reference to accompanying drawings.This embodiment of the present invention is illustrated among Figure 10, has a segment sync signal part 103 and one piece of data part 104 on independent one track T.The number of codewords of data division is 24 words of per pass; Arrange to have 16 information data words and 8 (each system is 4 words) parity check word (or error correction word) that belong to 2 systems in these 24 words.
Fig. 1-6 represents first kind of embodiment of the present invention.In this scheme, the information data that will write down is divided into every group of code character that comprises 16 code words.Each code word that makes n code group information data is W
0, n, W
1, n, W
2, n ... W
15, n is with first group of error correcting code, such as with Reed-Solomon (Reed-Solomon) sign indicating number C
2(20,16) are 4 odd even code words or 4 check code word P on basis
2, n, Q
2, n, R
2, n, S
2, n is added on these 16 code words.Then by as shown in Figure 1 the first time interleaving treatment or 20 words of encoding process after to this addition be for further processing.
In Fig. 1, ordinate is represented the ordinal number of code word; Horizontal ordinate is represented the ordinal number of code character.The corresponding direction parallel of ordinate with track, direction that horizontal ordinate is corresponding vertical with track or card vertical.
With regard to initial n code character, these 20 word (W
0, n is to W
1, n, P
2, n is to S
2, n) arrange by this way, being parallel to the direction of track (vertical direction of figure), in turn postpone 2 code words, in turn postpone a code character (one track) in direction (horizontal direction of figure) perpendicular to track.And, when when 20 code words that are parallel to track direction (vertical direction) arrangement are returned, should be by changing the arrangement of phase delay code word, so that the data in a code character can not overlap each other.That is to say, because during arranging data, postpone 2 code words in the track direction, so code word W
10, n will leave the arrangement of 20 code words in the track direction, and returns.Code word W
10, n is arranged at the position of first code word, and counts code word of skew from zero code word (ordinal number that code character is initial).Code word then postpones 2 code words successively in the track direction.As in delay perpendicular to the direction (horizontal direction among the figure) of track, by this quadrat method arranging data, the code word in initial code character, can be not overlapping in according to the second step encoding process (being described in the back) at same track.That is to say code word W
10, first code word when n(returns) and should be arranged in (n+13) code character, this is from first code word W of same code character
0, n has postponed 13 code characters.Code word then is arranged to postpone a code character in the direction of perpendicular recording groove successively.
Table 1 be illustrated in compile for the first time 20 code word W being arranged in after handling in n the code character '
0, n is to W '
19, the relation between 20 code words in n and the initial code character.
W in table 1
X, ySubscript X represent the sequence number (before first time encoding process) of initial code word; Subscript Y represents the code character sequence number; Symbol D represents each code word delay unit of (horizontal direction) on perpendicular to the track direction, postpones unit and is divided into 1 code character, 2 code characters and K code character (K a: integer).Fig. 1 has represented that the D of delay unit is the situation of 1 code character (code character of D=).D is that the situation of 2 code characters (D=2 code character) is described will explain second kind of embodiment afterwards the time.
By the way reach, because the number of the track T in the strip region on the optical data recording card of showing among Fig. 9 102 is limited, so it is necessary carrying out code character delay processing, when arriving last trace record groove of zone 102 vertical sides in the code word that is postponed successively perpendicular to the track direction, code word should be returned to the opposite side in zone 102.And (for example: in the scope about 50 code characters), the code word of delay should be returned along the direction perpendicular to track having predetermined code character number.
Next step is with second error correcting code, such as with Reed-Solomon (Reed-Solomon) sign indicating number C
1(24,20) are four check word P on basis
1, n, Q
1, n, R
1, n, S
1, n be added to 20 data code word W of each code character '
0, n is to W '
19, on the n.Then as shown in Figure 2 24 code words are carried out interleaving treatment or the encoding process second time.
In Fig. 2, it is the same that the relation between ordinate and the horizontal ordinate coexists among Fig. 1.With W '
0, n is to W '
19, n, P
1, n is to S
1, 24 code words of n postpone two code words being parallel to the direction of track (vertical direction), perpendicular to the direction (horizontal direction) of track and with the opposite direction of the encoding process first time on, postpone a code character (track).When between these 24 code words along track direction (vertical direction) when returning, the phase place of track direction should be delayed so that the data of same code character do not overlap each other.That is to say, because code word is arranged to postpone two code words in the track direction, so the 13rd code word (be R in this embodiment, return along the direction of track by the scope that n) exceeds the 24th Number character.The 13rd Number character (routine R in this case
1, n) being arranged on the position of 1 Number character, its phase place is from the initial code word W of this code character
0, moved the code word that a code word follows on No. zero position of n and postponed 2 code words successively in the track direction.And, with Reed-Solomon (Reed_Solomon) sign indicating number C
1(24,20) are the check word P on basis
1, n is to S
1, n is arranged at the track both sides along the track direction.Therefore, P, n, W '
0, n is to W '
9, n, Q
1, n inserts with the interval of two code words in No. 0 to No. 22 the code word scope, and with R
1, n, W '
10, n is to W '
19, n, S
1, n inserts with the interval of two code words in No. 1 to No. 23 the code word scope.Consider that in the displacement perpendicular to the track direction, the sequence number of code character is according to P
1, n, W '
0, n is to W '
9, n, Q
1, n, R
1, n, W '
10, n is to W '
19, n, S
1, the order of n is by a then minimizing.Work as P
1, when n is arranged in the n code character, S
1, n places (n-23) code character.
Table 2 has been showed and has been arranged in 24 code word W in this group of n code character (track) through the second time after the encoding process "
0, n is to W "
23, n and the relation between 24 code words before the encoding process for the second time.
In table 2, W '
X, ySubscript x represent the sequence number (before second time encoding process) of initial code word; Subscript y represents the code character sequence number; Symbol D is illustrated in the delay unit perpendicular to each code word of track direction (horizontal direction), and it is divided into-1 code character, and-2 code characters reach-a K code character (K a: integer).
Fig. 2 has showed that the D of delay unit is the situation of-1 code character (D=-1 code character).D is that the situation of-2 code characters illustrates will explain second kind of embodiment afterwards the time.
24 words, for example W of a code character that obtains like this "
0, n is to W "
23, n is known as so-called truncated data, notes on the data division 104 of the one-channel record groove of optical data recording card 100.Code word W in this case "
0, n, W "
1, n or W "
22, n, W
23, n is equivalent to the check word P that second error correcting code is arranged in track direction (vertical direction among Fig. 2) two ends
1R
1Or Q
1S
1
Fig. 3 is a calcspar of carrying out the scrambler of above-mentioned processing, and to each code character, the information source 11 that produces coding information data produces the data-signal that each code character comprises 16 code words, and this signal is admitted to C
2Code coder 12 is therein as the Reed-Solomon (Reed-Solomon) of first error correcting code sign indicating number C
2Four check words of (20,16) are (as P
2, n, Q
2, n, R
2, n, S
2, n) be added on the signal, form the data that a kind of each code character comprises 20 code words.C
2The data that code coder 12 comes out are admitted to first kind of encoding process loop 13 carrying out as in encoding process illustrated in fig. 1, and the loop output every group data that comprise 20 code words listed as table 1 thus, and it is sent into a C
1Code coder 14 adds the RS code C as second error correcting code therein
1Four check word (routine P of (24,20)
1, n, Q
1, n, R
1, n, S
1, n) form a kind of every group of data that 24 code words are arranged.From C
1The data that code coder 14 comes out are admitted to the second encoding process loop 15, carrying out as encoding process illustrated in fig. 2, and thus circuit through lead-out terminal 16 outputs as listed every group of table 2 comprise 24 code words (routine W "
0, n is to W "
23, data n).The so-called truncated data that is obtained by lead-out terminal 16 just is recorded on the per pass track T of strip region 102 of optical data recording card 100.And, at the moment, every group of data of lead-out terminal 16 outputs should be recorded on the data division 104 of one track, synchronization signal data is recorded on the synchronizing signal part 103 of track T.
Here, the C that shows among Fig. 3
2 Code coder 12, encoding process circuit 13 or C
1Code coder 14 and encoding process circuit 15 in fact all are to adopt as shown in Figure 4 stochastic storing mnemon (RAM) 21,22 and read-only memory cell (ROM) 23 to constitute.That is to say, the data that input terminal 24 is sent into and is stored among the RAM21 are handled, so that add check word according to the Error Correction of Coding program, thus, C above-mentioned
2(20,16) or C
1(24,20) error correcting code is added on each code character.This Error Correction of Coding program is realized by a digital signal processor (not drawing among the figure).By the counter 26 of the clock start signal of input end of clock 25, the address signal of RAM21 and ROM23 is read in output.According to these address signals, the data of reading from RAM21 and the check word data of error correcting code are sent to next step the encoding process RAM22.According to the address signal of counter 26, call over the address date that ROM23 takes place in the address, and control the data that write RAM22 with this.Promptly write the input data successively according to coded program shown in Fig. 1 or Fig. 2.In other words, the design memory that can regard Fig. 1 or Fig. 2 as encoding process RAM22.For example, used a RAM22 with a plurality of code characters (for example, about 50 code characters) capacity in the RAM that carries out encoding process shown in Figure 1, wherein each code character all comprises 20 code words.If data code word W of input
0, during n, just write RAM22, if enter code word W with address (n code character, the 0th Number character)
1, n, just ((n+1) code character, second Number character) writes in the address, and so on.Code word writes the address with Fig. 1 unanimity like this.Next step, when reading, each code word data W of each code character '
0, n is to W '
19, n reads on address (n code character, the 0th Number character to the 19 Number characters) successively, so that can carry out the data of encoding process for the first time according to the explanation of Fig. 1 from output terminal 27 outputs.Encoding process can be carried out similarly for the second time, also can data be write encoding process RAM and pass through control address and sense data according to the encoding process order according to the order of address in addition.
Fig. 5 has showed a kind of code translator, and it is used for the data of playback record on optical data recording card 100.The data-signal (by the output terminal in Figure 11 128) of the card read equipment output of being represented by Figure 11 is admitted to decoding scheme 32.Circuit 32 is with the encoding operation inverted running of representing among Fig. 2 second time.For example with 24 code word data W of each code character "
0, n is to W "
23, n sends into this circuit 32, it will export the data W of every group of 20 code words '
0, n is to W '
19, n and based on the input data four check code word data P
1, n, Q
1, n, R
1, n, S
1, n.24 code word data of this of each code character are admitted to C
1Code decoder 33 is therein according to 4 check word P of each code character
1, n is to S
1, n, to these 20 code word data W '
0, n is to W '
19, n carries out correction process.20 code word data of correcting of each code character are admitted to decoding treatment circuit 34 and carry out therein with the opposite operation of encoding operation for the first time.For example: 16 information code digital data W of each code character
0, n is to W
15, n and four check code word data P
2, n, Q
2, n, R
2, n, S
2, n can obtain thus.These data are admitted to a C
2Code decoder 35, therein, according to four check code word P of each code character
2, n is to S
2, n carries out error correction to 16 information code digital data.These correct information datas (every group of 16 words) are by output terminal 36 outputs.
The for example available form as shown in Figure 6 of the decoding treatment circuit of showing among Fig. 5 32 and 34 constitutes.Sent into RAM42 and be stored in wherein data by input end 41, read successively according to the address signal of counter 44, and counter 44 is by the clock start signal of input end of clock 43 inputs, the data of reading are admitted to encoding process RAM45.In addition, the count output signal with counter 44 offers the address terminal that ROM46 takes place in the address.According to the address of reading successively from ROM46, control writes the data address among the decoding processing RAM45.As mentioned above, in the time will writing RAM45 according to the program opposite with encoding process, processing also just can be deciphered by the order of this address sense data successively in the address of control appointment.Order by the address writes data decoding processing RAM45 and reads the address according to the decoding handling procedure by control, and sense data also is feasible.
With reference to Fig. 7 and Fig. 8 second kind of embodiment of the present invention can be described.In this scheme, the first time of first kind of scheme is in the encoding process, the D of delay unit perpendicular to the track direction is decided to be 2 code characters, and in second time encoding process, is decided to be-2 code characters perpendicular to the delay unit of track direction.
Fig. 7 has showed that a kind of scrambler is used for obtaining so-called truncated data signal, and these signals have the form that writes down of suiting on the optical recording card.Carrying out the Error Correction of Coding program, to obtain the truncated data process as follows.In Fig. 7, with 16 information code digital data W in each code character
0, n, W
1, n, W
2, n ... W
15, n offers the input end of scrambler.In first scrambler 51, will be as Reed-Solomon (Reed-Solomon) the sign indicating number C of first error correcting code
2Four check code word P of (20,16)
2, n, Q
2, n, R
2, n, S
2, n is added to 16 code word data W
0, n is to W
15, on the n.These 16 information data code word W
0, n is to W
15, n and four check code word P
2, n is to S
2, n is admitted to the first encoding process circuit and interleaving coder 52, carries out therein with similar interleaving treatment of Fig. 1 or encoding process.Yet, be 2 trace record grooves at the D of delay unit perpendicular to the track direction.Be attached to numeral on each deferred mount 53 in the interleaving coder 52 and specified the delay degree of data in the code character unit respectively, at each code word data, for example W ' of interleaver 52 outputs
0, n, W '
1, nW '
2, n ... W '
19, be that the situation of 2 code characters is corresponding perpendicular to the D of delay unit of track direction in the relation between each word of n and original input data and the table 1.Next step will be as the Reed-Solomon C(24 of second group of error correcting code, 20 in second scrambler 54) four check word P
1, n, Q
1, n, R
1, n, S
1, n is added on 20 code word data of interleaver 52.24 code word data of this of each code character are admitted to the second encoding process loop or interleaver 55.Carry out interleaving treatment or encoding process with Fig. 2 similar (yet D=-2 code character) interleaver 55.Each code word data W of interleaver 55 outputs "
0, n is to W "
23, the relation between each enter code word data of n and interleaver 55 is that the situation of-2 code words is corresponding with D in the table 2.Further, in the deferred mount 56 of interleaver 55 numeral of appointment in code character (or track) unit the input data delay degree.
As described above, can on the data division 104 of the track T of optical recording card 100, obtain so-called truncated data signal by interleaver 55 from the data-signal that is recorded.
Next step, Fig. 8 has showed a kind of code translator, is used for producing again on the optical recording card record data.24 code word data W with each code character of the optical pick-up device output terminal 128 shown in Figure 11 "
0, n is to W "
23, n offers the input end of this code translator.24 code word data of this of each code character are admitted to decoding treatment circuit or anti-interleaver 61, therein, carry out with the opposite processing procedure of the interleaver 55 of scrambler.After this, data are admitted to C
1Code decoder 63 is to carry out correction process and to export the data that each code character has 20 code words.20 code word data W of this of each code character '
0, n is to W "
19, n is sent to the decoding treatment circuit on the interleaver 64.Carry out therein with the opposite operation of the interleaver 52 of scrambler.After this, data are sent into C
2Code decoder 66 to be carrying out correction process, after the interweaving and finish correction process of two systems, and the information data signal W of 16 code words that each code character is initial
0, n is to W
15, n is output.In addition, the information in the deferred mount 62,63 in each anti-interleaver 61,64 has indicated in code character the delay degree of data in (or track) unit.
The present invention is not subjected to placing restrictions on of above-mentioned embodiment, and is parallel or perpendicular to each delay degree on the track direction in first encoding process, do not need with second encoding process in, parallel or perpendicular to each the delay degree unanimity on the track direction.And, also can freely determine the number of the check code word of the number of codewords of each code character or error correcting code.
Claims (1)
1, a kind of usefulness is so that have the optical recording card record of optical record medium and the device that reproduces, this optical recording card is by many data recording grooves parallel to each other, form with the pit figure is stored the information data signal that is recorded, so that available optical means is read, this device is characterised in that and comprises:
One is used to produce the information data source that will be recorded in the described information data signal on each described data recording groove;
Be used to show the device of first and second error correcting codes;
A code device comprises: produce check code word according to described first error correcting code, and described check code word is added to first scrambler on the output signal of described information data source; The output signal of described first scrambler is carried out the first encoding process circuit of first encoding process; Produce check code word according to described second error correcting code, and described check code word is added to second scrambler on the output signal of the described first encoding process circuit; And the second encoding process circuit of the output signal of described second scrambler being carried out second encoding process; The described first encoding process circuit comprises the device of arranging code word, make each code word postpone two code words along data recording groove direction, and along direction delay K bar track perpendicular to the data recording groove, wherein K is an integer, when the described code word that arrives data recording groove end will be around to the other end, and when being delayed, described code word is placed on its phase place moves past the code word number of a code word from the initial code number of words of code character position, then each code word is postponed two code words along data recording groove direction, the described second encoding process circuit comprises the device that is used to arrange each code word, make each code word postpone two code words along this data recording groove direction, and the edge is perpendicular to this data recording groove, and opposite direction postpones K bar track during with described first encoding process, wherein K is an integer, when the code word that arrives data recording groove end will be around to the other end, and when being delayed, described code word is placed on its phase place moves past the position of the code word number of a code word, then each code word is postponed two code words along data recording groove direction from the initial code number of words of code character;
A reader that is used for described optical recording card; And
A code translator comprises the second decoding treatment circuit, is used for the output signal execution of described reader is handled corresponding to second decoding of described second encoding process; Second code translator is used for the output signal execution of the described second decoding treatment circuit is handled corresponding to second error check of the described second error check sign indicating number; The first decoding treatment circuit is used for the output signal execution of described second code translator is handled corresponding to first decoding of described first encoding process; And first code translator, be used for the output signal of the described first decoding treatment circuit carried out corresponding to first error check of the described first error check sign indicating number and handle; The described first and second encoding process circuit comprise first random access memory, are used to store the data of having carried out the processing of error check sign indicating number by adding check code word; Second random access memory that is used for encoding process; First ROM (read-only memory) is used to produce the write address that writes described second random access memory; And first counter device, be used to described first random access memory and described first ROM (read-only memory) to produce and read the address; The described first and second decoding treatment circuits comprise the 3rd random access memory that is used to store sense data; Be used to decipher the 4th random access memory of processing; Be used to second ROM (read-only memory) that writes described the 4th random access memory and produce write address; And be used to and read from described the 3rd random access memory and described second ROM (read-only memory) and produce second counter device of reading the address.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85101774 CN1007670B (en) | 1985-04-01 | 1985-04-01 | Frror correcting method for optical data recording card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85101774 CN1007670B (en) | 1985-04-01 | 1985-04-01 | Frror correcting method for optical data recording card |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85101774A CN85101774A (en) | 1987-01-31 |
| CN1007670B true CN1007670B (en) | 1990-04-18 |
Family
ID=4792047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85101774 Expired CN1007670B (en) | 1985-04-01 | 1985-04-01 | Frror correcting method for optical data recording card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1007670B (en) |
-
1985
- 1985-04-01 CN CN 85101774 patent/CN1007670B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85101774A (en) | 1987-01-31 |
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