| 摘要 |
<p>Error correction method and device which allows two hard errors, or one hard error aligned with one soft error to be always corrected and fifty per cent of the error conditions comprising one hard error aligned with one soft error to be corrected. In write mode it consists in re-writing the words, the error syndrome of which indicates that a two-bit error is present with an inverted polarity. The N-bit error syndrome is chosen in such a way that a single bit error in a word stored with its true polarity is indicated by an odd number n1 of bits at "1" and in a word stored with its inverted polarity by an odd number n2 of bits at "1", n1 and n2 being different and n1 + n2 being equal to N and a two-bit error is indicated by an error syndrome having an even number of bits at "1" said number being different from N or 0.</p> |
