Methods and systems for decoding data

摘要

A method 300 of decoding is presented. The method 300 includes the steps of receiving 302 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 304 a 17PP modulated bit stream based upon the coded bit stream using a first selected decoding method, and generating 306 a plurality of decisions by processing the 17PP modulated bit stream using a second selected decoding method, wherein 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 a source information.