Patent ID: 6697098
Filing Date: 2004-02-24
Classification: H04L,H04N

Abstract:
In a system for processing a received Vestigial Sideband (VSB) modulated datastream containing high definition video data represented by a VSB symbol constellation and subject to exhibiting co-channel interference, said data having a data frame format constituted by a succession of data frames comprising a field sync component prefacing a plurality of data segments, said apparatus comprising:means responsive to said received datastream for producing a demodulated datastream; means for filtering said demodulated datastream to produce a filtered demodulated datastream; means for providing a reference signal; means for filtering said reference signal to produce a filtered reference signal; an NTSC interference detector having an input network, and an output coupled to a signal processing path; and means for providing said demodulated datastream, said reference signal, said filtered demodulated datastream and said filtered reference signal to said input network; wherein said demodulated datastream and said filtered demodulated datastream applied to said input network contain symbol data which is oversampled at a multiple of the symbol rate of said received datastream.