Method of generating chromaticity point-dependent switching info

Details Method of generating chromaticity point-dependent switching info Method of generating chromaticity point-dependent switching info

1975-03-24

1977-08-02

Griffin, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 522

Patent

active

040400867

ABSTRACT:
A chroma-keyer is for a coded color video signal without decoding to color signals taking place. The chrominance signals component is filtered from the coded color video signal and added to a combination of gating stages switching in accordance with an adjusted chromaticity point and a color synchronization signal, which, after adjustable Schmitt triggers and flip flops, provides an output switching signal for chroma-keying.

REFERENCES:
patent: RE28021 (1874-05-01), Boxman et al.
patent: 3392231 (1968-07-01), Schonfelder
patent: 3560638 (1971-02-01), Skrydstrup et al.
patent: 3778542 (1973-12-01), Hanseman

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