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:
Jan. 16, 1996
Filed:
Aug. 01, 1994
Kazunari Yamaguchi, Settsu, JP;
Atsuhisa Kageyama, Ibaraki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A noise reducing apparatus includes a delay device for delaying a first video signal by one horizontal period. Also included is a first subtracter for subtracting the output of the delay device from an input video signal and a limiter for clipping the output of the first subtracter at a designated level. A variable coefficient-multiplier is also provided for multiplying the output of the limiter by a variable coefficient k where 0<k<1. A second subtracter subtracts the output of the variable coefficient multiplier from the input video signal and an adder adds the output of the first subtracter and the output of the limiter. A coefficient multiplier is also provided for multiplying the output of the adder by a fixed value 0.5. A third subtracter subtracts the output of the coefficient multiplier from the input video signal and a correlation detector provides a signal to control the coefficient value of the variable coefficient multiplier in response to the output of the first subtracter.