Patent ID: 6643331
Filing Date: 2003-11-04
Classification: H03M,H04L

Abstract:
A coding and modulation method for digital data, comprising:receiving an input sequence of data bits; encoding sad input sequence to generate a first encoded sequence of data bits; interleaving said input sequence to create an interleaved sequence of data bits; encoding said interleaved sequence of data bits to generate a second encoded sequence of data bits; and modulating a sequence of data sets each including at least one of a data bit derived from said input sequence, a first parity bit derived from said first encoded sequence and a second parity bit derived from said second encoded sequence, wherein during an earlier period each of a plurality of said data sets includes at least one said data bit and one said first parity bit but does not include any said second parity bits, and during a later period each of a plurality of said data sets includes at least one said second parity bit.