Flicker preventing circuit

Details Flicker preventing circuit Flicker preventing circuit

1981-08-31

1983-10-25

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358140, H04N 514

Patent

active

044122519

ABSTRACT:
A flicker preventing circuit for a television receiver is disclosed which includes a first delay line for delaying an input video signal by one horizontal sweep period and producing a first delayed signal, a second delay line for delaying the input video signal by two horizontal periods and producing a second delayed signal, a switching circuit for selecting either the input video signal or the second delayed signal, the switching circuit being switched alternately according to which of the even and odd interlaced fields, respectively, is being displayed, an adder for adding the output signal from the switching circuit and the first delayed signal each other, and a level changing circuit for changing the level of either the input video signal or the second delayed signal relative to the level of the first delayed signal.

REFERENCES:
patent: 4300162 (1981-11-01), Robers

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