Method of and arrangement for inserting a background signal into

Details Method of and arrangement for inserting a background signal into Method of and arrangement for inserting a background signal into

1992-12-07

1995-01-10

Groody, James J.

Television

Image signal processing circuitry specific to television

Special effects

348591, 348595, H04N 974

Patent

active

053811844

ABSTRACT:
In a method of and an arrangement for inserting a background signal into parts of a foreground signal fixed by a predetermined key color, in which a control signal is derived from the foreground signal, this control signal assuming a first value when the foreground signal represents a color in the region of the key color and a second value when the foreground signal represents a different color, and in which the control signal has a transition range between the two values, a difference, influenced by the control signal, between the vector of the background signal and the vector of a signal representing the key color is vectorially added to the foreground signal.

REFERENCES:
patent: 4409611 (1983-10-01), Vlahos
patent: 4667221 (1987-05-01), Cawley
patent: 4811084 (1989-03-01), Belmares-Sarabia
patent: 4949165 (1990-08-01), Reimann
patent: 5249039 (1993-09-01), Chaplin
patent: 5301016 (1994-04-01), Gehrmann

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