Image pickup device with digital signal processing for reducing

Details Image pickup device with digital signal processing for reducing Image pickup device with digital signal processing for reducing

1994-03-02

1997-08-19

Hsia, Sherrie

Television

Camera, system and detail

Combined image signal generator and general image signal...

348256, H04N 520

Patent

active

056593589

ABSTRACT:
An image pickup device comprises variable gain control circuits 11-13 and 23-25 for respective channels of digital color signals and luminance signals to control the gains by a gain control signal SG. Since the gains are variable in the digital signal channels, the deterioration of the image quality is reduced. The number of input bits of the variable gain control circuits is larger than the number of output bits to minimize the deterioration of the signal due to the loss of digits in coefficient circuits in the variable gain control circuits.

REFERENCES:
patent: 4345270 (1982-08-01), Nagumo
patent: 4620222 (1986-10-01), Baba
patent: 5293225 (1994-03-01), Nishiyama

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