Patent ID: 7813445
Filing Date: 2010-10-12
Classification: H03M,H04N

Abstract:
1. A digital television (DTV) transmitter for processing digital broadcast data, the DTV transmitter comprising: a signal generator for generating a first data group comprising first, second and third regions, the second region being positioned between the first and third regions, the first and third regions including main data, RS parity data but no enhanced data, the second region including enhanced data coded with a first coding rate, enhanced data coded with a second coding rate that is different from the first coding rate, a plurality of known data sequences, signaling information and RS parity data but no main data; an interleaver for interleaving the first data group to generate a second data group, the second data group comprising fourth, fifth and sixth regions, the fifth region being positioned between the fourth and sixth regions, the fifth region including enhanced data encoded with one of first and second coding rates, a plurality of known data sequences, signaling information, and RS parity data but no main data, the fourth region including main data, RS parity data, and enhanced data, wherein enhanced data in at least one segment in the fourth region are coded with the first coding rate and enhanced data in at least one segment in the fourth region are coded with the second coding rate that is different from the first coding rate; a trellis encoder for trellis encoding the second data group; and a modulator for modulating a broadcast signal including the trellis encoded second data group for data transmission.