公开(公告)号：JP2002100127A

公开(公告)日：2002-04-05

申请号：JP2001206336

申请日：2001-07-06

Applicant: IBM

Inventor： MARTIN OLERIANO HASUN ,  RICHARD MICHAEL H NE ,  ARUBINDO MOTEIBUHAI PEITO ,  TAMURA TETSUYA ,  BARRY MARSHALL TOREIJI

IPC: G06F11/10 ,  G06F12/16 ,  G11B20/18 ,  H03M13/15 ,  H03M13/45

Abstract: PROBLEM TO BE SOLVED: To provide a decoding method and system which lessen the complicatedness of a maximum likelihood decoding method and the waiting time for results without significantly affecting performance and without losing bit reliability information. SOLUTION: A software error correction algebra decoder and an associated method derive an error position and value by using the degrees of erasure reliability. More specifically, the degrees of the signal reliability from the maximum likelihood(ML) decoder and the parity check success/failure from an internal modulation code symbol are iteratively combined in such a manner that an error erasure rate is maximized. The software error correction (ECC) algebra decoder and the associated method decode a Reed-Solomon code by using the information on the binary code and detector side. The Reed-Solomon code is optimized for the purpose of use on an erasure channel. A threshold regulation algorithm modifies an erasure candidate in accordance with the detector error filter output and modulation code restriction success/failure information.