Video processing amplifier providing black level correction

Details Video processing amplifier providing black level correction Video processing amplifier providing black level correction

1976-11-17

1977-12-27

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 518

Patent

active

040657906

ABSTRACT:
An improved video processing amplifier includes means for correcting for any black level distortion present in a composite video signal input for restoring the black level to a substantially undistorted video signal black level. The composite blanking and sync signals are removed from the composite video signal input prior to black level distortion correction and restoration. A window signal positionable in a central area of the associated video picture producable from the composite video signal input is provided to accomplish black level distortion correction and restoration, with this window signal being used to key a keyed clamp DC restoration circuit ON during the central area of the associated video picture information. Image enhancement is provided in the resultant output composite video signal in a single transistor state. In addition, both white and black peak level clipping is provided in a common clipping amplifier stage based on the saturation characteristics thereof.

REFERENCES:
patent: 3819859 (1974-06-01), Borsuk et al.

Affiliated with

Also associated with

Rating

Video processing amplifier providing black level correction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Video processing amplifier providing black level correction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video processing amplifier providing black level correction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1042027