Patent ID: 6721917
Filing Date: 2004-04-13
Classification: H03M

Abstract:
A method for optical disk decoding, for decoding an error correction code (ECC) block, the method comprising the steps of:(a) determining whether it is to perform outer code decoding first: if not, proceeding to step (b); or if so, proceeding to step (d); (b) performing inner code decoding and EDC checking; (c) determining whether one of the following is true: (1) error correction is complete; (2) the number of errors is over the limitation of error correction so that the error-correcting operation cannot be performed; or (3) the decoding operations are performed for a number of times but the correction is not complete: if so, proceeding to step (f); or if not, proceeding to step (d); (d) performing outer code decoding; (e) determining whether one of the following is true: (1) the error correction is complete; (2) the number of errors is over the limitation of error correction so that the error-correcting operation cannot be performed; or (3) the decoding operations are performed for a number of times but the correction is not complete: if so, proceeding to step (f) or if not, proceeding to step (b); (f) performing descrambling; and (g) performing EDC checking.