Patent ID: 8473807

Claim:
A broadcast transmitter comprising: a randomizer for randomizing enhanced data; a first encoder for Reed Solomon (RS) encoding and Cyclic Redundancy Check (CRC) encoding the randomized enhanced data; a block processor for encoding the RS-CRC encoded enhanced data at a coding rate of 1/H, wherein H is greater than 1; a group formatting unit for forming a data group including the encoded enhanced data and de-interleaving data of the data group, wherein the formed data group further includes main data place holders, known data sequences, trellis initialization data, MPEG header place holders, and RS parity data place holders; a packet formatter for removing the RS parity data place holders and the main data place holders from the data group in which data are deinterleaved and replacing the MPEG header place holders in the data group, in which data are deinterleaved, with MPEG headers, thereby outputting enhanced data packets; a first multiplexer for multiplexing the enhanced data packets with main data packets including main data; a second encoder for adding RS parity data to the multiplexed enhanced and main data packets by RS encoding the main data packets of the multiplexed enhanced and main data packets with a systematic RS encoding scheme and RS encoding the enhanced data packets of the multiplexed enhanced and main data packets with a non-systematic RS encoding scheme; and an interleaver for interleaving data of the RS-encoded enhanced and main data packets.