Gamma correction circuit which selects one of a plurality of gam

Details Gamma correction circuit which selects one of a plurality of gam Gamma correction circuit which selects one of a plurality of gam

1994-09-09

1996-01-02

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Gray scale transformation

348254, H04N 5202, H04N 969

Patent

active

054813174

ABSTRACT:
A gamma correction circuit includes a plurality of gamma function forming circuits, each of which modifies an input signal to provide different gamma correction signals. The input signal level is compared with a predetermined signal level, and based on the comparison one of the different gamma correction signals is selected as an output signal of the gamma correction circuit.

REFERENCES:
patent: 3752905 (1973-08-01), Schneider
patent: 4805013 (1989-02-01), Dei et al.
patent: 4931864 (1990-06-01), Kawamura et al.
patent: 4962433 (1990-10-01), Matsushima
patent: 5070405 (1991-12-01), Ejima et al.
patent: 5089890 (1992-02-01), Takayama
patent: 5132796 (1992-07-01), Topper et al.
patent: 5175621 (1992-12-01), Maesato

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