Patent ID: 7756011
Filing Date: 2010-07-13
Classification: H04N

Abstract:
1. A digital television (DTV) transmitter for coding main and enhanced data, 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 data; a data formatter for generating one or more groups of enhanced data packets, at least one enhanced data packet including the pre-processed enhanced data and known data, which is known by transmitting and receiving sides in advance, wherein the data formatter adds a transmission parameter including group information into each of the one or more groups of enhanced data packets, the group information not known by the receiving side until the transmission parameter is transmitted by the transmitting side; a packet multiplexer for multiplexing the one or more groups of enhanced data packets with at least one main data packet including the main data; and a trellis encoder, having at least one memory, for trellis-encoding the multiplexed one or more groups of enhanced data packets and the at least one main data packet, wherein the trellis encoder initializes the at least one memory at a position where the known data starts.