Entzerrervorrichtung mit schneller Aktualisierung der Filterkoeffizienten

摘要

An improved equalization apparatus includes updating circuit for generating, in response to the received television signal and the error signal, a set of updated filter coefficients as the set of the filter coefficients for the equalizer filter, which comprises: a shift register for storing and shifting a data sample to provide a set of the data samples; a multiplier for multiplying a error signal with the set of the data samples to provide a set of error weighted data samples; a scaling circuit (33), in response to a blind mode signal, for scaling down the set of error weighted data samples with a first scale value in order to generate a first set of scaled error weighted data samples and, in response to a decision mode signal, for scaling down the set of error weighted data samples with a second scale value to generate a second set of scaled error weighted data samples; an adder for adding the first or the second set of scaled error weighted data samples to a set of previous filter coefficients in order to produce a set of updated filter coefficients as an output of the updating circuit; and a FIFO buffer for storing the set of updated filter coefficients as the set of previous filter coefficients for the adder.