USING EQUALIZED DATA FOR FILTER SELECTION IN HDTV RECEIVER

摘要

A digital television receiver includes a filter for minimizing NTSC interference with a received signal (IN) having a constant symbol rate. An equalizer (54) has two one-symbol delays for each tap. A filtered a nd a non-filtered version of the received signal are applied to a multiplexer (56) at the input of the equalizer, which is operated at twice the symbol rate. The outputs of the multipliers in the equalizer are combined and applied to a demultiplexer (80). The filtered and non- filtered equalized signals are compared and a selection as to which of the filtered or non-filtered received signals is to be processed is made based upon the comparison.