Patent ID: 8243849

Claim:
A transmitter for transmitting main and enhanced data, the transmitter comprising: a first encoder for encoding the enhanced data for forward error correction (FEC); a packet formatter for forming enhanced data packets including the encoded enhanced data and a plurality of known data sequences; a second encoder for Reed Solomon (RS)-coding data in the enhanced data packets, the second encoder adding non-systematic RS parity data to the enhanced data packets; a data interleaver for interleaving the RS-coded data; a trellis encoder for trellis-encoding the interleaved data, wherein the trellis encoder includes a plurality of memories that are initialized by initialization data at a start of each of the plurality of known data sequences; a non-systematic RS encoder for generating new parity data based on the initialization data and outputting the generated new parity data; a first multiplexer for selecting the interleaved data output from the data interleaver or the generated new parity data output from the non-systematic RS encoder and providing the selected data to the trellis encoder; and a second multiplexer for multiplexing the trellis-encoded data with frame sync data and segment sync data.