Patent ID: 7739574
Filing Date: 2010-06-15
Classification: H03M,H04L,H04N

Abstract:
1. A DTV transmitter for coding main and enhanced data for transmission, the DTV transmitter comprising: a pre-processor for pre-processing the enhanced data by coding the enhanced data for forward error correction (FEC) and expanding the FEC-coded enhanced data; a data formatter for generating enhanced data packets including the pre-processed enhanced data; a first multiplexer for multiplexing the enhanced data packets with main data packets including the main data; an RS encoder for RS-coding the multiplexed main and enhanced data packets; a data interleaver for interleaving the RS-coded main and enhanced data packets and outputting a group of interleaved data packets having a data region including a plurality of consecutive enhanced data packets, wherein a plurality of known data sequences are regularly spaced in the data region; and a trellis encoder for trellis-encoding the interleaved data packets, the trellis encoder being initialized when a beginning of each known data sequence is input from the data interleaver; an initialization controller for generating initialization data required to initialize one or more memories included in the trellis encoder; and a second multiplexer for outputting the initialization data to the trellis encoder when the beginning of each known data sequence is input to the trellis encoder.