METHODS AND SYSTEMS FOR DECODING DATA

摘要

PROBLEM TO BE SOLVED: To provide methods for decoding a coded bit stream.SOLUTION: A method includes the steps of: receiving a coded bit stream that is encoded using a Non Return to Zero Inverted (NRZI) code and a 17 Parity Preserve/Prohibit (17PP) code; determining a 17PP modulated bit stream on the basis of the coded bit stream using a first selected decoding method; and generating a plurality of decisions by processing the 17PP modulated bit stream using a second selected decoding method. The received coded bit stream comprises a plurality of coded bits, and the plurality of decisions are estimates of a plurality of source bits in source information.