Video special effects generator

Details Video special effects generator Video special effects generator

1976-08-20

1978-10-17

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358182, 358183, 358185, H04N 522

Patent

active

041212533

ABSTRACT:
An analog video special effects generator capable of producing unusual special effects such as a five-pointed star, a heart, a keyhole and a binocular shaped pattern in addition to standard patterns such as horizontal and vertical wipes. The special effects are achieved by utilizing ramp generators to generate bi-directional ramp signals and modulus circuits for taking the absolute values of the ramp signals in order to generate complex waveforms. Switching and combining circuits are utilized to combine the complex waveforms from various ones of the modulus circuits to generate the switching waveforms necessary to produce the unusual patterns.

REFERENCES:
patent: 3728479 (1973-04-01), Srinivasan

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