| 摘要 |
An error correction method for successively correcting burst errors which may occur in product-coded data while the data is successively transmitted along its row (or column) direction. 1-symbol errors are detected and corrected by a C2 parity provided to correct data errors of the product-coded data in its column (or row) direction, the C2 parity being capable of detecting and correcting 1-symbol errors and effecting an erasure correction on up to 2-symbol errors. When it is detected that a burst error has occurred, which cannot be corrected by a C1 parity provided to correct data errors in the row (or column) direction, and such burst error extends over 3 rows (or columns) (i-1,i,i+1), inherent 2-symbol errors within such burst error are detected from 3-symbol errors which are located in columns (or rows) before and after the columns (or rows) at which 1-symbol errors have been detected and corrected by the C2 parity with reference to detection information of the burst error detected by the C1 parity. Erasure correction is then effected on such 2-symbol errors thus detected. |
