Patent ID: 8094727

Claim:
A digital television (DTV) transmitter comprising: a first randomizer for randomizing enhanced data; a Reed-Solomon (RS) frame encoder for generating an RS frame by adding RS parity data and cyclic redundancy check (CRC) data to the randomized enhanced data; a group formatting unit for mapping a portion of data in the RS frame into a data group and adding known data sequences, RS parity data place holders, main data place holders and MPEG header data place holders to the data group; a deinterleaver for deinterleaving the data group; a packet formatter for: removing the RS parity data place holders and the main data place holders in the deinterleaved data group, replacing the MPEG header data place holders in the deinterleaved data group with MPEG header data, and outputting enhanced data packets; a multiplexer for multiplexing the enhanced data packets with main data packets including main data to generate multiplexed enhanced data packets and multiplexed main data packets; a second randomizer for randomizing the multiplexed main data packets and the MPEG header data in the multiplexed enhanced data packets; a Reed-Solomon (RS) encoder for RS encoding the multiplexed enhanced data packets comprising the randomized MPEG header data with a non-systematic RS encoding scheme and RS encoding the randomized multiplexed main data packets with a systematic RS encoding scheme; an interleaver for interleaving data of the RS-encoded data packets; and a trellis encoder for trellis encoding the interleaved data.