Keying methods for digital video

Details Keying methods for digital video Keying methods for digital video

1991-04-09

1991-12-03

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 975

Patent

active

050703978

ABSTRACT:
A digital video key signal generator for digital video special effects uses two cascaded programmable lookup tables. One table is addressed by the two chroma component signals and the second table is addressed by the luma signal and the output of the first table. The generator is particularly suitable for use with CCIR Rec. 601 digital signals, and can be used for a wide variety of compositing functions, using luma keys, chroma keys, combinations thereof, and multiple chroma keys simultaneously.

REFERENCES:
patent: 4051520 (1977-09-01), Davidse
patent: 4394680 (1983-07-01), Watanabe
patent: 4500919 (1985-02-01), Schreiber
patent: 4533937 (1985-08-01), Yamamoto

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