| 摘要 |
PURPOSE:To suppress the probability of erroneous correction to a low value by stopping the correction even when there is a solution at a location not in existence in the code word in the solution of an error location polynomial sigma(x)=0 and the number of the order of sigma(x) and the number of the solutions of sigma(x)=0 differ. CONSTITUTION:First syndrome is calculated and the decoding system is made different depending on the number of errors. Let an integer having the relation of t'<t be t', and in the case of the relation of K<=t', t'-multiple error correction processing is applied, and when the relation of K>=t'+1 exists, the t-multiple error correction processing is applied. In the case of a small t'-multiple of error, the correction by an exclusive processor is applied in real time and in the case of the error of t'+1 or over and (t) or below, the error is corrected in non-real time by using the software of a conventional microprocessor. It is impossible to separate the case of the number of errors K being K<=t' and K>=t'+1 completely, but even in the case of K>=t'+1, the error is possibly processed by the t'-multiple error correction corresponding to the case with K<=t'.
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