Patent ID: 8565354

Claim:
A digital broadcasting receiver, comprising: a receiver to receive input data comprising normal data, supplementary data, a field sync and a segment sync, the supplementary data comprising known data which is different from the field sync and the segment sync and is a predefined pattern already known between a digital broadcasting transmitter and the digital broadcasting receiver; a demodulator to demodulate the input data; a known data detector to detect a location of the known data from the demodulated data; and an equalizer to equalize the demodulated data using the known data, wherein the supplementary data comprising the known data is deinterleaved at the digital broadcasting transmitter and is trellis-encoded at a trellis encoder of the digital broadcasting transmitter such that internal memories of the trellis encoder are initialized at a beginning point of the known data, wherein the supplementary data is processed at the digital broadcasting transmitter to be more robust against error than the normal data, and wherein the input data is first RS-encoded to add a parity and is second RS-encoded to regenerate a parity according to data altered by the initialization of the internal memories so that the parity is replaced with the regenerated parity.