Patent ID: 8145979

Claim:
A digital television (DTV) receiving system for processing digital broadcast data, the DTV receiving system comprising: a tuner for receiving a broadcast signal comprising a data group, the data group having first and second data regions, the first data region including a plurality of data segments, the second data region including a plurality of data segments, the first data region having enhanced data, known data sequences, and signaling information, and the second data region having main data and enhanced data, wherein a total number of enhanced data bytes in an ith segment in the second data region is different from a total number of enhanced data bytes in an (i+1)th segment in the second data region; a demodulator for demodulating the broadcast signal; an equalizer for compensating channel distortion of the broadcast signal using the known data sequences; a first decoder for first decoding the channel-distortion-compensated broadcast signal; and a second decoder for second decoding the first-decoded broadcast signal.