Chroma keying selector system

Details Chroma keying selector system Chroma keying selector system

1978-08-30

1980-01-08

Griffin, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 522

Patent

active

041830458

ABSTRACT:
A remotely controlled chroma keyer is provided which is responsive to the red, green and blue signals from a video source such as a color camera for providing color difference signals. A signal processing system using quadrant multipliers is used for summing and differencing these color difference signals which when applied to a non-additive mixer select a particular color. The color selection is determined by control voltages applied to the multipliers.

REFERENCES:
patent: 3560638 (1971-02-01), Skrydstrup et al.
patent: 3678182 (1972-07-01), Boxman et al.
patent: 3959813 (1976-05-01), Legler
patent: 4051520 (1977-09-01), Davidse et al.

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