Patent ID: 8176375
Filing Date: 2012-05-08
Classification: H03M,H04L,H04N

Abstract:
1. A digital television (DTV) transmitter for processing main data and enhanced data for transmission, the DTV transmitter comprising: a pre-coder for pre-coding the enhanced data for forward error correction (FEC); a data formatter for generating enhanced data packets including the pre-coded enhanced data; a multiplexer for generating multiplexed data packets by multiplexing the enhanced data packets with main data packets including the main data; a randomizer for randomizing data in the multiplexed data packets; a Reed-Solomon (RS) encoder for systematic RS-coding the main data packets in the multiplexed data packets and non-systematic RS-coding the enhanced data packets in the multiplexed data packets; a data interleaver for interleaving the systematic RS-coded main data packets and the non-systematic RS-coded enhanced data packets and outputting a data group having first, second and third regions, wherein the second region is located between the first and third regions, wherein the second region includes known data sequences and the enhanced data packets, and wherein the first and third region include the enhanced data packets and the main data packets; and a trellis encoder for trellis-encoding data in the data group, wherein the trellis encoder provides data for trellis initialization when a beginning of each of the known data sequences is output from the data interleaver, and wherein one or more memory units included in the trellis encoder are initialized with the data for trellis initialization.