Key signal generating apparatus for digital chromakey system

Details Key signal generating apparatus for digital chromakey system Key signal generating apparatus for digital chromakey system

1982-09-09

1985-08-06

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

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H04N 9535

Patent

active

045339376

ABSTRACT:
A key signal generating apparatus for a digital chromakey system for generating a key signal in accordance with the difference between a reference hue corresponding to a back color data and a hue of an input video data in U-V chroma signal coordinates, in which the gain of key signal is determined by quadratic curve groups in the U-V chroma signal coordinates.

REFERENCES:
patent: 4389664 (1983-06-01), Robitzch
patent: 4394680 (1983-07-01), Watanabe
International Broadcast Engineer, vol. 11, No. 173, Sep. 1980.

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