Contrast and brightness control whereby both are based on the de

Details Contrast and brightness control whereby both are based on the de Contrast and brightness control whereby both are based on the de

1993-11-23

1995-04-11

Groody, James J.

Television

Image signal processing circuitry specific to television

Gray scale transformation

348689, 348691, 348698, H04N 972, H04N 964, H04N 968

Patent

active

054063361

ABSTRACT:
A circuit arrangement for processing an input video signal (V) is described, which video signal has a fixed black level (SP), a given white peak value (WW) as well as a black peak value (SW) dependent on the picture contents (during tb), in which a correct display of the blackest and brightest parts of the picture contents of the video signal (V) is rendered possible without many components and without interference. To this end the circuit arrangement includes

REFERENCES:
patent: 3947631 (1976-03-01), Rhee et al.
patent: 3970777 (1976-07-01), Bradford et al.
patent: 4204229 (1980-05-01), Heuze
patent: 4369466 (1983-01-01), Matsuzaki et al.

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