JPS58150180A - System for reproducing magnetic data - Google Patents

Abstract

PURPOSE:To enable reproduction of records when a data error after started editing and detected a start code or stop code once data bits was temporarily stored in a storage section, by stopping editing and returning to the next bit data of the detected start code or stop code to restart trial editing and to check the succeeding records to be normal. CONSTITUTION:Editing is started after data are stroed in a storage section by moving a head forward or backward on magnetic stripes. The editing is normal when, for example, a stop code is detected after a start code which represents all ''1'' or a start code is detected after a stop code, but, a remained previous start code, etc., if any, reasonably causes discontinuity of data and data error. In this case, the editing is stopped and again started trial editing after returning to the next bit data of the start code, and, by detecting normal codes and stop codes to revive records on magnetic stripes which have been disposed as faulty records, and to improve the reproduction ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention This invention is a method for storing bit data on an aX stripe read by relative movement of a medium or a head on which a magnetic stripe is attached during the outward and return passes. This is a method for reproducing fly data.

(Conventional technology and problems Conventionally, the magnetic stripe data is divided into 100,000 units by the P head during the return trip.) The correct format is used. - is determined and reproduced. 罽Illfalse)~←) indicates the state in this case. 1iij Move the magnetic stripe 1 in the direction of the arrow in Fig. I ■, data 01...
Stop code (no, Chetsuta code (2) is detected 1,
This data can contain parity errors and format errors in single digit units. tjQ-(a)o In the event of an abnormality, the process ends if the data marked with an x is NG as a result of the parity check.

As described above, the conventional method does not store the 9-day I bits to be read, but performs a checker on a digit-by-digit basis. Generally, in the case of 4IJL of magnetic stripe, JI! !
! The previous data will not be deleted when updating, and will remain when updating the next Opi.
It can be detected at birth with approximately 1gA.

In this case, for example, the occurrence of -1 is detected after the remaining start code is detected. However, in this case, if the remaining start signal portion is removed, the next normal start code and data bit should be detected.

However, as mentioned above, the method of performing chettuta on a digit-by-digit basis without memorizing the data bits does not solve this problem.

(2) Purpose of the present invention The purpose of the present invention is to provide a magnetic data reproducing method that detects a start code previously remaining on a magnetic stripe and enables reproduction if the subsequent recording is normal even if the start code remains in the magnetic stripe. It is.

(4-shot @O configuration) The magnetic data 4gi method of Hontaka is a rounding method that achieves the above purpose, and the magnetic stripe is applied to the magnetic stripe by approximately 4 times in the outward or backward direction of the sensitive body or head on which the magnetic stripe is affixed. In the eta data reproduction method h that reproduces the above bit data, -1 bit data is stored fsK After the storage is completed,
- After starting the prefecture, the start code or stop code is detected, and after 9, if a data error) occurs, the IIA collection is terminated, It is considered to be boring if you try to complete the return page collection four times.

(〜Departure@O Example 3i128m (a)〜(4 is a general description of the present departure 111O■
Please visit.

tj5 ml (a) () When the head 09 moves back and forth over the magnetic stripe, the O data is stored in the memory, and the mourning ceremony, Ial&, is performed.

Edited by the same I! As shown in m (@), if you look at 9 from 5Klll memory, the start code Oi & stop hakama which shows all 1, 1 friend detects the s I-) sign after the stop sign, and if it is a circle, it is normal (OK). In h) and (d), as mentioned above, if there is a residual start signal of the hook, discontinuity of the fiber data occurs, so a data error jl(NO) occurs.

ζ046 ends a# &, performs 4 trials of the start code O next bit data, and detects a normal start code and stop code. &! By making the best use of the sickle, the Kama and the 4th Marago Association are raised.

Figure JII5 shows the configuration of the embodiment of the present invention iS! -It is a song.

At 1iid1g, head 2 moves over magnetic stripe 1.
moves under the control of the head 111 circuit 5, reads the data from the head 2, and sends it to the pit size WR diagram 1# via the amplifier 3.
I4, and judges whether the bits are @1" or "0" and whether the bit data is present or invalid. Address set by the head control circuit 5 (Al# As e...)
The address control circuit 6) accesses the memory s7, and the li! of the judgment V# circuit 4 is accessed. Stores 9 data pins (1, 0) with whether the system is valid or invalid. After the head has finished moving in one direction, that is, after the storage in the storage unit 7 has finished, the fa collection is started.

In the m thread, data is input to the shift register 8 in units of 1 bit data from the first address in the storage section 7.

Then, the parallel outputs of 7 registers/8 registers are passed through a data validity check circuit 11 to a start code detection circuit 12 and a checker code calculation circuit 15. Stop code detection-, connection 14.
The check code calculation result comparison circuit 15 is inputted to the fill data storage 1114. In the start code detection circuit 12, the parallel output O pit data is valid, and these are used as the start code for a while, and at 9 o'clock, the Issho code is stored by the 7v tug 70 twig 18.

Well, the address at this time is stored in the starting suit address memory 17. 4E) NGil Emperor 0 place has a start suit wit address Meminegae 17) Start code address O is Ili! and input it to the address control circuit 4. Tsurig 70g 180g force■ by Le A
The pit data of the ND9 is checked by the 4-bit counter 10 and converted into 4-bit digit units by the check code calculation circuit 1s and the stop code detection circuit 14.
．． Chetsuta code calculation method comparison round 15 is manually performed. The checker code arithmetic circuit 13 performs a rounding operation to create a checkerboard. Stop code detection circuit 1
In 4, determine whether it is a stop code or not and repeat 7 rip 7 vx tsug (j'J') 1? Then I remembered 0
Detects that Yanagi data is counted by check code. This is a check together with the T/*-de of the output of the Chetsuta calculation circuit 150;
Enter , and check whether the digit following the stop; - code matches the check code calculation result. If the circles match, it's OK; if it doesn't match, it's NG. When the effect occurs, is it a gate? Send it to Omiban 1llt Jeong 20 via '. The result judgment circuit 20 receives pNG from the address control 1gl path 6 at the end address when there is no data in the system. This ll! If the output of the l button sentry section 20 is NG, the above-mentioned output 0 is returned.

Blind 9, the data in valid digit units of the data validity check circuit 11 is expanded and stored in the data storage s16, and the result is 4111.
It is used when the disconnection lI20 is OK.

In Ishiwaom's work, if the correct format is played and the correct format is played, Chetsuta code calculation M! Comparison of lI-
The output of error 15 is OK''e and ends.

When an NG occurs, if a start code is detected before the NG occurs, the address next to the start code O detection address in the storage unit 7 (Df-1-1% etc. 1lIJl
Try l& again. If the start code is not machine #A1, continue to detect the start code.

The above procedure is repeated until the end address of the memory s7 becomes NG#completed or OKNcompleted.

If the data communication at the end address trench does not end OK, the previous Ia is also used for the head O recovery.
o Carry out a consultation.

(＠From -〇effect more than i1! III As mentioned above, according to the superposition-, even if the data of the magnetic stripe j Since 4 cliffs are possible, it is possible to increase the 4-year rate.Since the 19-bit data is stored in the memory unit and then stored in Ichigame Shichigyo, Since the meat on the head O transfer is different on the outbound and return trips, 4piti-oigia brothel is possible, and 4I
It is effective for improving the efficiency of jiII & field O.

Example, head transfer IIIJ format data four! If the cut is Start, Data, J) Tsubutu, Chetsuta;-T, the same method can be used even if the 4#, 1m Hawk, Takechu Day, I7 format is different.

[Brief explanation of the drawing]

slLlgl(a) to (・) are general explanations and illustrations of conventional examples,
Figure 2 (&) - (The figure is an abbreviated diagram of the O-ridge of the present invention, and Figure 3 is a configuration #i@ diagram of an embodiment of overlapping.) In the figure, 1 is a magnetic stripe, 2 is a head, i Hiro amplifier, 4 wire bit judgment &
gi path, 5 is the head 11 circuit, 6 is the address control circuit, 7 is the storage section, 8 is the shift register, ? ,? 'amND
10 is a 4-bit check circuit, 11 is a data validity check circuit, 12 is a start code detection circuit, 13 is a check code calculation circuit, 14 is a stop code detection circuit,
15 is a check; - code operation result comparison circuit; 16 is a data storage section; 17 is a static code aware address memory; 18, 1? is a flip 7-tup, 2g is #! ll Shows the V# section. Patent agent Fujitsu Ltd. Kinsha's representative agent Bencher 1) Yoshishige Saka Figure 1 5. . (b) to O, g) (I) L2)---111111, I
B5) Figure 2

Claims (1)

[Claims] A head for a medium to which a magnetic stripe is attached. On the outward journey, in the magnetic data reproduction method that reproduces the bit data on the p reading stripe by the relative movement of v The encoder detects a stop code, and after that, data v4p is generated and if it is good, it finishes editing, detects a start code or stop code, returns to the 9th order bit data, and reattempts pne collection. Characteristic magnetic data - reproduction method.