Patent ID: 7593474

Claim:
A digital broadcast receiver configured to receive a signal from a digital transmitter, wherein the digital transmitter comprises a known data exchanger inserting known data at a certain position in data, an interleaver interleaving the data including the known data, a trellis encoder trellis encoding the interleaved data including the known data having a specified length of bytes to an 8-level symbol at a rate of ⅔, and a modulator performing a VSB modulation of the trellis encoded data, the digital broadcast receiver comprising: a demodulator performing a VSB demodulation of the received, modulated signal, the signal having the trellis encoded symbol corresponding to the known data having the specified length of bytes; and an equalizer removing an interference of the demodulated signal according to the trellis encoded symbol corresponding to the known data, wherein the known data is a predefined sequence known between the digital transmitter and the digital broadcast receiver.