Video mixing apparatus

Details Video mixing apparatus Video mixing apparatus

1995-12-07

1998-10-20

Peng, John K.

Television

Image signal processing circuitry specific to television

Special effects

348585, 348590, 348591, 348586, 348587, 348593, 348594, H04N 5272, H04N 5273

Patent

active

058254331

ABSTRACT:
A video mixing apparatus for mixing a first video signal and a second video signal in accordance with a first key signal and a second key signal. The video mixing apparatus includes a key signal mixer for receiving the first and second key signals and generating and outputting a third key signal and a fourth key signal, wherein a level K.sub.1 of the first key signal, a level K.sub.2 of the second key signal, a level K.sub.p of the third key signal, and a level K.sub.m of the fourth key signal satisfy the relationships:

REFERENCES:
patent: 4851912 (1989-07-01), Jackson et al.
patent: 5305107 (1994-04-01), Gale et al.
patent: 5353068 (1994-10-01), Moriwake
patent: 5428401 (1995-06-01), Hinson
Y. Oda, "Key Process Technique In Postproduction", Jul. 1994, (8 pages).
European Search Report dated Feb. 4, 1997.

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