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:
Jul. 31, 1979
Filed:
Dec. 21, 1976
Norio Ebihara, Yokohama, JP;
Kaichi Tatsuzawa, Yokohama, JP;
Sony Corporation, Tokyo, JP;
Abstract
A method of and apparatus for reducing the noise of an input signal, such as a composite video signal. An orthogonal transform of the input signal is derived, this orthogonal transform having n transformed signal components. At least some of these signal components are suppressed if their respective signal levels are less than a threshold level. Preferably, the n transformed signal components correspond to different portions of the input signal; and those components representing the higher frequency portions are suppressed if their signal levels are less than the threshold level. Following this signal suppression, the n transformed signal components are reconverted into substantially the input signal, less the suppressed components.