Patent ID: 8438464

Claim:
A method for processing enhanced data in a transmitter, the method comprising: pre-coding the enhanced data by coding the enhanced data for forward error correction (FEC); generating enhanced data packets including the pre-coded enhanced data; Reed Solomon-coding (RS-coding) the pre-coded enhanced data in the enhanced data packets by a non-systematic RS coding scheme; interleaving the RS-coded enhanced data; generating new parity data based on initialization data for trellis initialization; outputting the generated new parity data; and trellis-encoding the interleaved enhanced data based on 2-bit symbols at a trellis encoder, wherein a memory in the trellis encoder is initialized at a start of a known data sequence, wherein when the trellis encoder is in an initialization mode, the trellis encoder uses data coming from an internal state within the trellis encoder, and wherein the trellis encoder provides modified input data for trellis initialization to a non-systematic RS encoder, wherein the non-systematic RS encoder re-calculates RS parity data for the trellis initialization.