Television installation comprising a circuit arrangement for the

Details Television installation comprising a circuit arrangement for the Television installation comprising a circuit arrangement for the

1983-02-03

1985-04-02

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358168, 364414, 378 99, H04N 718

Patent

active

045090742

ABSTRACT:
A television installation comprising a circuit arrangement for amplification alteration or variation of the video signal in dependence upon its current mean value as compared to a reference mean value. A television camera and monitor are provided, and the current video signal is intermediately stored in an image memory. A mean value is formed in a mean value circuit. This value is compared in relation to a reference value of a reference circuit. A factor is supplied in the form of an output signal of a division stage to a multiplication stage in which the factor is multiplied with the video signal contained in the image memory. The video signal is thereby standardized to a reference value.

REFERENCES:
patent: 4013833 (1977-03-01), Zimmerman
patent: 4375068 (1983-02-01), McBride
patent: 4473843 (1984-09-01), Bishop

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