Video signal defect replacement circuitry

Details Video signal defect replacement circuitry Video signal defect replacement circuitry

1981-06-22

1983-01-11

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 37, 358166, 358167, 358314, H04N 9535, H04N 521

Patent

active

043684831

ABSTRACT:
A video defect compensator is provided which develops a replacement or substitution video signal for use during a defect in the signal normally being displayed. The substitution signal is generated by averaging four picture points in the vicinity of the displayed picture point, two from the television line preceding the line currently being displayed and two from the television line succeeding the line currently being displayed. The four picture points are made available by utilizing a 2H delay line and wherein the line currently displayed is delayed by one TV line. Two signals temporally displayed by one color subcarrier period and delayed from the current signal by 1H are summed. Two signals temporally displaced by one color subcarrier period and preceding the currently displayed signal by 1H are also summed. The two sets of summed signals are then combined and divided by four to produce a replacement signal which is the average of four picture points.

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patent: 4140923 (1979-02-01), Herrmann
patent: 4250521 (1981-02-01), Wright
patent: 4272785 (1981-06-01), Fuhrer

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