Patent ID: 8498364
Filing Date: 2013-07-30
Classification: H04L

Abstract:
1. A digital broadcasting receiver, comprising: a demodulator to demodulate input data comprising normal data and supplementary data in at least one filed, the supplementary data having been processed at a digital broadcasting transmitter to be more robust against error than the normal data, and comprising known data which is a signal pattern previously known between the digital broadcasting transmitter and the digital broadcast receiver; a known data output part to detect a location of the known data in the demodulated supplementary data; and an equalizer to equalize the supplementary data using the known data, wherein the known data is distinct from a segment sync and a field sync which are included in the at least one field, wherein the supplementary data comprising the known data is deinterleaved at the digital broadcasting transmitter, and trellis encoded at a Trellis encoder of the digital broadcasting transmitter such that the internal memories of the Trellis encoder are initialized at a beginning point of the known data, and wherein the known data is altered at the digital broadcasting transmitter according to the initialization of the internal memories of the Trellis encoder and used to regenerate a parity of the supplementary data of the input data so that a previous parity of the supplementary data of the input data is replaced with the regenerated parity.