CCD-type color video camera with gamma correction

Details CCD-type color video camera with gamma correction CCD-type color video camera with gamma correction

1993-09-14

1994-11-01

Powell, Mark R.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348674, H04N 5202, H04N 969

Patent

active

053610946

ABSTRACT:
A video signal processing circuit of a CCD-type color video camera includes a gamma-correcting circuit section, a delay circuit section, a chrominance signal processor and a luminance signal processor. Accordingly, the circuit is configured such that gamma-compensation processing is performed before the separation of the luminance and chrominance signals, and a DC fluctuation due to the gamma-compensation processing is compensated in the luminance signal processor. Thus, horizontal noise caused by the gamma correction can be eliminated, which not only improves picture quality but also enables a reduction in chip size.

REFERENCES:
patent: 5068718 (1991-11-01), Iwabe et al.
patent: 5253046 (1993-10-01), Shiraishi

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