| 摘要 |
One set of syndromes is calculated (102) from a first data string from among a plurality thereof including at least 2t+1 symbols as a parity string, and coefficients of an error locator polynomial are calculated (103) from the one set of the syndromes. Whether or not a correction is successful is judged (104) by using the coefficients of the error locator polynomial and the same calculation is performed for a second data string if a correction failure is judged. Contrarily, if a correction success is judged, an error of the first data string is corrected (105) by using the aforementioned set of the syndromes and the coefficients of the error locator polynomial.
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