Patent ID: 7921352

Claim:
A method of processing digital broadcast data in a broadcast receiver, the method comprising: receiving a broadcast signal including main data, enhanced data and known data; compensating channel distortion of the received broadcast signal using the received known data; inner decoding the channel-distortion compensated broadcast signal; and outer decoding the inner-decoded broadcast signal, wherein the received broadcast signal results from: pre-coding original enhanced data for forward error correction (FEC), generating enhanced data packets including the pre-coded original enhanced data, multiplexing the enhanced data packets with main data packets including original main data, Reed-Solomon (RS)-coding the multiplexed main and enhanced data packets, wherein the main data packets are RS-coded with a systematic RS encoding scheme and the enhanced data packets are RS-coded with a non-systematic RS encoding scheme, and wherein 47th, 48th, 49th, 50th and 51st bytes in at least one of the RS-coded enhanced data packets are non-systematic parity data, interleaving data in the RS-coded main and enhanced data packets, and trellis-encoding, by a trellis encoder, the interleaved data, the trellis encoder being initialized at a beginning of the known data.