Patent ID: 8472481
Filing Date: 2013-06-25
Classification: H04H,H04L

Abstract:
1. A method of processing digital broadcast data in a digital television (DTV) transmitter, the method comprising: coding first enhanced data for forward error correction (FEC) at a first coding rate; coding second enhanced data for forward error correction (FEC) at a second coding rate; block processing the coded first and second enhanced data by specific code rates, wherein the specific code rates are ½ or ¼; forming data groups including the block processed first and second enhanced data and inserting place-holders for MPEG headers and place-holders for non-systematic Reed-Solomon (RS) parity into the data groups, wherein at least one of the data groups includes first, second and third regions, wherein the second region includes known data sequences; deinterleaving data in the data groups; removing the place-holders for non-systematic Reed-Solomon (RS) parity and replacing the place-holders for MPEG headers with MPEG headers to generate enhanced data packets including the deinterleaved data; multiplexing the generated enhanced data packets and main data packets including main data to output multiplexed data packets; RS-coding the main data in the multiplexed data packets by a systematic RS encoding scheme; RS-coding the enhanced data in the multiplexed data packets, by a non-systematic RS encoding scheme; interleaving data in the multiplexed data packets in a data interleaver; and trellis encoding the interleaved data in a trellis encoder, wherein a memory in the trellis encoder is initialized prior to each of the known data sequences.