Digital chromakey apparatus

Details Digital chromakey apparatus Digital chromakey apparatus

H - Electricity

04

N

350/41

H04N 9/04 (2006.01) H04N 9/75 (2006.01)

Patent

CA 1187166

ABSTRACT OF THE DISCLOSURE In a digital chromakey apparatus, a digital key signal is generated in response to specified chroma infrmation 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.

406778

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