Patent ID: 7590187

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 to an 8-level symbol at a rate of ⅔, and initializing a memory of the trellis encoder to a predetermined value in a predetermined position of the interleaved known data, 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, the known data being processed by the initialized trellis encoder of the transmitter; 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.