The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 1983
Filed:
Jul. 30, 1981
Anthony Troiano, Princeton Junction, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
Apparatus is described for automatically depeaking the luminance signal of a television receiver under high noise conditions to improve the subjective appearance of reproduced images. Noise accompanying the luminance signal is sensed by bandpass filtering the signal and applying the filtered signal to a detector via a sampling circuit. The sampling circuit is enabled only during the horizontal blanking interval of the luminance signal to reject the active video portions of the luminance signal. The detector is of the pulse averaging type wherein pulses representative of peaks of the sampled signal above a threshold level are generated and averaged to produce a smoothed control signal that is principally representative of the noise and substantially independent of luminance signal transitions which occur during the sampling interval. The control signal is applied to a peaking control circuit in the receiver in a sense to vary the luminance signal peaking inversely with changes in the noise level whereby the luminance signal is automatically depeaked under high noise conditions.