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:
Aug. 30, 1988
Filed:
Sep. 02, 1986
Applicant:
Inventor:
Yutaka Ichinoi, Yokohama, JP;
Assignee:
Victor Company of Japan, Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358167 ; 358340 ;
Abstract
To suppress noise included in a video signal, the noise level is detected by a noise level detecting circuit which operates only within blanking period; and the noise level is suppressed through control of a gain control circuit in accordance with an output signal from the noise level detecting circuit. The gain control circuit may be a voltage controlled variable gain amplifier interposed between a limiter and a subtractor of an in-line noise supressing circuit. A vertical correlation noise canceller may also be combined so that a gain control circuit interposed between a limiter and a subtractor is also controlled.