Input video processor for color television cameras

Details Input video processor for color television cameras Input video processor for color television cameras

1980-04-11

1982-01-19

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358163, 358174, H04N 9535

Patent

active

043120148

ABSTRACT:
An input video processor utilizes the characteristics of a modulator having two differential pairs of transistors with respective gain control terminals, in combination with a switch. The processor performs four distinct functions utilizing the same basic modulator; it provides blanking the video signal from the preamplifier to provide a clean pulse for clamping at a later stage; it clamps the output during black level firmly to ground potential to allow subsequent blanking; it allows the manipulation of the master gain of the three channels in a color television while independently adjusting the gain of the channels, while further maintaining absolute tracking between channels; and it provides an independent gain control input for a white shading control voltage input to perform white shading corrections.

REFERENCES:
patent: 3600511 (1971-08-01), Cooksey
patent: 3651255 (1972-03-01), Kubota
patent: 4104678 (1978-08-01), Van Roessel
patent: 4148069 (1979-04-01), Smiley
patent: 4240103 (1980-12-01), Poetsch

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