Patent ID: 7797607
Filing Date: 2010-09-14
Classification: H03M,H04N

Abstract:
1. A digital television (DTV) transmitter for processing main 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 multiplexing the enhanced data packets with main data packets including the main data; a Reed-Solomon (RS) encoder for RS-coding the multiplexed main and enhanced data packets, the RS encoder adding systematic RS parity data to the main data packets and adding non-systematic RS parity data to the enhanced data packets; a data interleaver for interleaving the RS-coded main and enhanced data packets, wherein the non-systematic RS parity data are placed at predetermined positions within the interleaved enhanced data packets; and a trellis encoder for trellis-encoding the interleaved main and enhanced data packets, wherein the trellis encoder is initialized at each start of a plurality of known data sequences, and wherein the interleaved enhanced data packets include enhanced data encoded with a coding rate of 1/L, wherein L is greater than 1.