Patent ID: 8301985

Claim:
A digital television (DTV) transmitter for processing broadcast data, the DTV transmitter comprising: a randomizer for randomizing enhanced data; a Reed Solomon (RS) frame encoder for performing at least one of error correction encoding and error detection encoding on the randomized enhanced data; a block processor for encoding the encoded enhanced data at a coding rate of 1/L, wherein L is greater than 1; a group formatting unit for mapping the enhanced data encoded at the coding rate of 1/L to at least one region of a data group including a plurality of regions, the data group further including a plurality of known data sequences; a data deinterleaver for deinterleaving the data group; a packet formatter for adding data of the deinterleaved data group to MPEG header data, thereby outputting enhanced data packets; an RS encoder for RS encoding the enhanced data packets in order to insert non-systematic RS parity data in the enhanced data packets, wherein the non-systematic RS parity data are inserted in predetermined positions within the enhanced data packets; a data interleaver for interleaving the RS encoded enhanced data packets; and a trellis encoder for trellis-encoding data of the interleaved enhanced data packets, wherein memories of the trellis encoder are initialized by initialization data at a start of at least one known data sequence, wherein the initialization data are determined according to values of the memories.