Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-03-14
1989-12-12
Grody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358181, 358185, H04N 522
Patent
active
048871591
ABSTRACT:
Video effects apparatus comprises a pattern generator for generating a mix control signal which, when used to control the combination of first and second input video signals to provide an output video signal, defines the geometrical shape in a composite output scene of a transition between a first component scene represented by the first input video signal and a second component scene represented by the second video signal. The pattern generator responds to a size control signal by causing the mix control signal to vary in a manner such that the area of the composite output video scene that is occupied by the first component scene changes relative to the area of the second component scene while the geometrical shape of the transition between the component scenes remains the same. A shadow generator generates a signal which adjusts the visual characteristics of the second component scene synchronously with the variation of the control signal.
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Gray Francis I.
Grody James J.
Powell Mark P.
Smith-Hill John
The Grass Valley Group Inc.
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