Digital television special effect waveform generator

Details Digital television special effect waveform generator Digital television special effect waveform generator

1982-09-20

1985-05-28

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, H04N 522, H04N 9535

Patent

active

045203989

ABSTRACT:
A digital television special effect waveform generator produces a gate signal used for composing two video signals as a special effect, provided with a waveform having a soft width in which these two video signals are gradually alternated, according to the direct digital calculation of digital data consisting of a stating address, a central address and an aspect ratio of the waveform. As a result, a special effect waveform for smoothly alternating two video signals can be easily obtained with a comparatively simple digital circuit configuration prevented from the injurious influence of noise.

REFERENCES:
patent: 4266242 (1981-05-01), McCoy
patent: 4409618 (1983-10-01), Inaba et al.

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