Digital video effect system comrising only one memory of a...

Details Digital video effect system comrising only one memory of a... Digital video effect system comrising only one memory of a...

H - Electricity

04

N

350/53

H04N 9/74 (2006.01) H04N 5/262 (2006.01)

Patent

CA 1137622

Abstract of the Disclosure In a digital video effect system, only one one-frame RAM produces a mixed and phase-locked signal for n individually synchronised input television signals when read by horizontal and vertical address signals derived from a reference timing signal in synchronism with horizontal and vertical synchronizing pulses included therein. Digital video signals and vertical address signals derived from n or (n - 1) input television signal or signals are written in n or (n - 1) four-line RAM by horizontal address signals derived also therefrom and read by horizontal address signals derived either from the timing signal or one of the n input television signals. Thus horizontally phase-locked digital video signals are written in the one-frame RAM by the last-mentioned horizontal address signals and likewise horizontally phase-locked vertical address signals.

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