Patent ID: 6816548
Filing Date: 2004-11-09
Classification: H04N

Abstract:
A system for processing a received Vestigial Sideband (VSB) modulated signal containing high definition video information represented by a VSB constellation of symbols and subject to exhibiting unwanted perturbations, comprising:a demodulator responsive to said received VSB modulated signal for producing a baseband demodulated signal; and an adaptive equalizer having an input for receiving said baseband demodulated signal and an output at which an equalized baseband signal is produced, said adaptive equalizer including (a) an adaptive feed forward filter (FFF) for equalizing said demodulated signal, said FFF exhibiting (1) linear, non-decision directed blind operation in a first operating mode, and (2) decision-directed operation in a subsequent second operating mode; and (b) an adaptive decision feedback filter (DFF) for equalizing said demodulated signal, said DFF exhibiting (1) linear, non-decision directed blind operation in said first operating mode, and (2) non-linear decision-directed operation in said second operating mode.