| 摘要 |
Reliability of data is improved by increasing the length of burst error correction of recorded data. Instead of the conventional error correcting codes produced in a sector, error correcting code interleaved among sectors is generated. Otherwise, double codes are formed by decreasing parity number of the conventional error correcting codes produced in the sector and adding error correcting code interleaved among the sectors instead. The length of burst error correction of recorded data is increased by interleaving error correction code among the sectors. Further, the efficiency of use of disk can be improved since parity sector is not used and, in addition to this, the speed of processing can be improved since there is no need to read out unnecessary sectors during correction.
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