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
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[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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Abstract
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