Luminance clipper with color subcarrier filter to prevent clippi

Details Luminance clipper with color subcarrier filter to prevent clippi Luminance clipper with color subcarrier filter to prevent clippi

1985-04-02

1986-12-09

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21R, H04N 977, H04N 516

Patent

active

046283480

ABSTRACT:
A baseband color video signal processor includes a selective transistor clipper for holding luminance components to a maximum level. The base of the transistor is operated at a first voltage below the desired maximum level. A tuned circuit, tuned to the frequency of the chrominance subcarrier, is connected in its emitter-collector path of the transistor for isolating it from chrominance components in the color video signal.

REFERENCES:
patent: 3290433 (1966-12-01), De France et al.
patent: 3760094 (1973-09-01), Skerlos
patent: 3980815 (1976-09-01), Kaneko
patent: 4484216 (1984-11-01), Rumland

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