Video special effect generator

Details Video special effect generator Video special effect generator

H - Electricity

04

N

350/53

H04N 5/262 (2006.01)

Patent

CA 1114494

A B S T R A C T A video special effect generator for producing a wiped effect between two video signals uses presettable counters to define the boundary between the wiped and the wiping picture portions. The counter is clocked with pulses synchronised with the horizontal or vertical synchronising signal, depending on whether the picture is being wiped horizontally or vertically, is loaded with a preset count during each horizontal or vertical period as appropriate and produces a signal defining the boundary of the wipe when it overflows. Arrangements for both horizontal and vertical wiping are disclosed; the vertical presettable counter may be used to load the horizontal presettable counter to achieve diagonal wiping of the picture.

303651

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