Digital chromakey apparatus

Details Digital chromakey apparatus Digital chromakey apparatus

1982-07-08

1984-12-11

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 9535

Patent

active

044881690

ABSTRACT:
In a digital chromakey apparatus, a digital key signal is generated in response to specified chroma information of first digital video signal designating a foreground scene and the first digital video signal is switched into second digital video signal designating a background scene in accordance with level of the digital key signal. According to this invention, the digital key signal is adjusted or compensated in level at portions of leading and trailing edges thereof so as to expand or compress the area of chromakey.

REFERENCES:
patent: 4386363 (1983-05-01), Morrison
patent: 4389664 (1983-06-01), Robitzsch
patent: 4396939 (1983-08-01), Kitahama
patent: 4408221 (1983-10-01), McCoy

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