Video signal processing circuit

Details Video signal processing circuit Video signal processing circuit

1980-08-13

1983-09-06

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358172, H04N 516

Patent

active

044032544

ABSTRACT:
A video signal processing circuit is disclosed which has a wave-forming circuit for setting the level of an input video signal to a predetermined first D.C. level, which is higher than the pedestal level of the input video signal, at least during the blanking period of the input video signal, and producing a wave-formed signal; a peak-hold circuit for detecting and holding the level of the darkest peak of the wave-formed signal and producing a peak-hold output signal; and a black level control circuit controlled by the peak-hold output signal for controlling the D.C. level of the input video signal so that the darkest level of the input video signal coincides with a predetermined second D.C. level.

REFERENCES:
patent: 3947631 (1976-03-01), Rhee
patent: 3985954 (1976-10-01), Kuniyoshi
patent: 4110787 (1978-08-01), Parker
Automatic Black Level Set, Blanchard, RCA Technical Notes, Dec. 19, 1975, TN No. 1137.

Affiliated with

Also associated with

Rating

Video signal processing circuit 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 signal processing circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal processing circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1594808