Patent ID: 7839950
Filing Date: 2010-11-23
Classification: H04N

Abstract:
1. A digital television (DTV) transmitting system for processing digital broadcast data, the DTV transmitting system comprising: a Reed-Solomon (RS) frame encoder for generating an RS frame by adding RS parity data at bottom ends of columns of an RS frame payload and by adding Cyclic Redundancy Check (CRC) data at right ends of rows of the RS frame payload, the RS frame payload including enhanced data; a block processor for encoding the data included in the RS frame with a coding rate of 1/H, where H is greater than 1; a group formatting unit for mapping a portion of the data encoded with the coding rate of 1/H into a data group, adding known data sequences, signaling information and trellis initialization data to the data group, and deinterleaving the data group; an interleaver for interleaving the deinterleaved data group, wherein an ith segment in the interleaved data group has main data and M consecutive enhanced data bytes, an (i+1)th segment in the interleaved data group has main data and L consecutive enhanced data bytes, and an (i+2)th segment in the interleaved data group has main data and K consecutive enhanced data bytes, wherein M<L<K, wherein at least two of the known data sequences are spaced 16 segments apart, and wherein the trellis initialization data are positioned prior to each of the known data sequences; a trellis encoder for trellis encoding the interleaved data group, wherein the trellis encoder is initialized when the trellis initialization data are input to the trellis encoder; and a modulator for modulating a broadcast signal including the trellis-encoded data group.