Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1979-07-18
1981-02-03
Murray, Richard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358171, H04N 520
Patent
active
042492084
ABSTRACT:
A gamma correction circuit for a video signal which is simple to be integrated in a semiconductor body and which has a minimum of adjusting points in a simple adjusting procedure. The signal whose gamma is to be corrected is applied to a linear and to a non-linear amplifier circuit, a pulse having a determined amplitude being added in line blanking periods. The amplifier output signals whose black level is fixed are applied to a signal comparison circuit for the pulse amplitudes and a differential signal is fed back to the input of the non-linear amplifier circuit. The signal whose gamma is to be corrected is formed from the amplifier output signals via a potentiometer.
REFERENCES:
patent: 3845326 (1974-10-01), Godden
Haenen Henricus W. G.
Hesselmann Gerardus J. M.
Needs Howard C.
Briody Thomas A.
Goodman Edward W.
Murray Richard
Streeter William J.
U.S. Philips Corporation
LandOfFree
Gamma correction circuit for a video signal and television camer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gamma correction circuit for a video signal and television camer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma correction circuit for a video signal and television camer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-553501