Magnetic card decoding and error-correcting method

An error correction method and magnetic card technology, which is applied in the field of decoding and error correction of magnetic cards, can solve the problems of low success rate and poor accuracy of swiping cards

Active Publication Date: 2013-02-13
SHENZHEN XINGUODU PAYMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, existing magnetic cards have the defects of low success rate of card swiping and poor accuracy.

Method used

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  • Magnetic card decoding and error-correcting method
  • Magnetic card decoding and error-correcting method
  • Magnetic card decoding and error-correcting method

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Embodiment Construction

[0018] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0019] The invention discloses a decoding and error correction method for a magnetic card, such as figure 1 As shown, the method includes the following steps:

[0020] S10, storing the pulse width value corresponding to the magnetic signal pulse in each track;

[0021] S11, calculating a digital phase-locked loop synchronized with the original signal according to the magnetic signal;

[0022] S12, in the same data cycle, determine whether there is a pulse jump, if yes, execute step S14, if not, execute step S13;

[0023] S13, the data decoded by this bit is 0;

[0024] S14, whether the ratio y of the next pulse width to the current pulse width satisfies: 0.7<y<1.3, if yes, execute step S15, if not, execute step S16;

[0025] S15, the data decoded by this bit is 1;

[0026] S16, the data marked by this bit is 2;

[0027] S17, judging whether...

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PUM

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Abstract

The invention discloses a magnetic card decoding and error-correcting method which comprises the steps of S10, storing a pulse width value corresponding to a magnetic signal pulse in every magnetic track; S11, calculating a digital phase-locked loop synchronous with original signals according to magnetic signals; S12, in the same data cycle, determining whether pulse hoping happens, if pulse hoping happens, executing S14, otherwise executing S13; S13, enabling data of decoding a bit to be 0; S14, determining whether the ratio y of the next pulse to the current pulse width meets the formula 0.7<y<1.3, if the ratio y meets the formula, executing S15, otherwise executing S16; S15, enabling data of decoding a bit to be 1; S16, enabling data of labeling a bit to be 2; S17, determining whether the data are the last of the magnetic signal pulse, if the data are the last, executing S18, otherwise returning to S12; S18, determining the initial and the last of the data according to the encoding rule of magnetic track data; and S19, setting data labeled as 2 into 1 or 0 through odd-even check and longitudinal redundancy check (LRC). The magnetic card decoding and error-correcting method can increase success rate and accuracy of magnetic card identification.

Description

technical field [0001] The invention relates to the technical field of magnetic card identification, in particular to a decoding and error correction method for magnetic cards. Background technique [0002] With the rapid development of finance, securities, commerce and other fields, magnetic cards have been widely used as identity authentication and identification tools. At present, the magnetic cards on the market are made of plastic cards and magnetic strips attached to the surface. The magnetic strips are formed by attaching some tiny ferromagnetic materials to similar plastic tapes. Substances that can still retain magnetism later. Using magnetic particle attachment technology, by changing the polarity of the magnetic particles attached to the magnetic strip at different frequencies, the recording of logical data "0" and "1" is realized, and then it can be recorded on the magnetic strip by encoding the binary data all kinds of information. [0003] What is recorded o...

Claims

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Application Information

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IPC IPC(8): G06K7/00H03M13/15
Inventor 熊中仕欧阳伟权
Owner SHENZHEN XINGUODU PAYMENT TECH CO LTD
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