Video signal clamping device

Details Video signal clamping device Video signal clamping device

2005-06-09

2008-12-02

Yenke, Brian P (Department: 2622)

Television

Image signal processing circuitry specific to television

A/d converters

C348S695000, C348S697000

Reexamination Certificate

active

07460177

ABSTRACT:
A signal processing device of the present invention includes: an input unit which inputs an analog video signal; an A/D converter which converts the analog video signal to a digital video signal; a detecting unit which detects a level in a predetermined period of the digital video signal output from the A/D converter; a difference output unit which detects a difference between the level detected by the detecting unit and a desired value; a modulating unit which performs sigma-delta modulation on an output from the difference output unit; and a clamping unit which performs a clamping process on the analog video signal input by the input unit based on an output from the modulating unit and which outputs the clamped analog video signal to the A/D converter.

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patent: 10042281 (2002-03-01), None
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