Image switching apparatus for producing special video effects

Details Image switching apparatus for producing special video effects Image switching apparatus for producing special video effects

1991-11-15

1993-04-27

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358181, 358183, 358 22, H04N 5262, H04N 5268, H04N 974

Patent

active

052067297

ABSTRACT:
Image switching apparatus for selecting first or second video signals to be broadcasted, displayed or recorded, thereby producing special video effects. The output of a random noise generator is filtered by a filtering device having a variable filter characteristic that is controlled by an adjustable filter control signal. The filtered random noise signal is compared with a reference level that changes with respect to time, and the output of the comparator controls a switch to select one or the other of the video signals, depending upon whether the filtered random noise signal exceeds the changing reference level, thus producing special image switching effects.

REFERENCES:
patent: 4811104 (1989-03-01), Kawabe
patent: 5051828 (1991-09-01), Chaplin

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