Patent ID: 6470473
Filing Date: 2002-10-22
Classification: G11B,H03M

Abstract:
A data decoding processing system for decoding data which is obtained by adding two error correcting code series to a scrambled data added with error detection codes, the data decoding processing system being so configured to generate syndromes of a first series from said data, to perform an error correction of said data on the basis of the generated syndromes of said first series, to store said syndromes of said first series after the error correction, to generate and store syndromes of a second series from the error corrected data and simultaneously to descramble the error corrected data so as to store the descrambled data, to perform an error detecting code calculation for the descrambled data so as to store the result of said error detecting code calculation, and thereafter on the basis of the stored syndromes of said second series and the stored syndromes of said first series, alternately to perform the error correction of the descrambled data and to revise the stored syndromes of said second series or the stored syndromes of said first series, to revise the stored result of said error detecting code calculation.