Patent ID: 7903758

Claim:
A digital television (DTV) receiving system for processing digital broadcast data, the DTV receiving system comprising: a tuner for receiving a broadcast signal including a data group, the data group comprising enhanced data, known data sequences, and signaling information, wherein at least two of the known data sequences are spaced 16 segments apart, wherein an ith segment in the data group has main data and M consecutive enhanced data bytes, an (i+1)th segment in the data group has main data and L consecutive enhanced data bytes, and an (i+2)th segment in the data group has main data and K consecutive enhanced data bytes, and wherein M<L<K; a demodulator for demodulating the broadcast signal; an equalizer for compensating a channel distortion of the demodulated broadcast signal using at least one of the known data sequences; an inner decoder for inner decoding the equalized broadcast signal; and an outer decoder for outer decoding the inner-decoded broadcast signal.