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A METHOD AND APPARATUS FOR EQUALIZING A SIGNAL CONTAINING HIGH DEFINITION TELEVISION INFORMATION IN THE PRESENCE OF CO-CHANNEL NTSC INTERFERENCE EMPLOYS AN EQUALIZER (22) HAVING FEED FORWARD AND DECISION FEEDBACK FILTERS. A COMB FILTER (20) IS INSERTED AHEAD OF THE QUALIZER WHEN NTSC CO-CHANNEL INTERFERENCE IS PRESENT. A SELECTED TAP OF THE DECISION FEEDBACK FILTER (26) IS SET TO A ZERO VALUE WHEN THE SIGNAL IS BEING EQUALIZED DURING AN INTITIAL BLIND OPERATING MODE. THE DECISION FEEDBACK FILTER TAPS ARE UPDATED AFTERWARDS, IN A DECISION-DIRECTED OPERATING MODE.(FIGURE 1).
MYPI200213752001-04-162002-04-15Method for equalizing a vsb high defination television signal in the presence of co-channel interference
MY129429A
(en)