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. 31, 1993
Filed:
Aug. 26, 1991
Hans-Juergen Desor, Gundelfingen, DE;
Deutsche ITT Industries GmbH, Freiburg, DE;
Abstract
An arrangement and method for reducing the noise component of a television picture chrominance signal, using a vertical digital filter. A noise-reduced reference signal is formed from the chrominance signals of vertically preceding lines. A difference signal is derived, wherein the noise-reduced reference signal, entering into the calculation of the difference signal, is created by the recursive signal processing operations of the digital filter. The transversal signal-processing operations of the digital filter affects the reduction of the noise component. The difference signal, before passing through the recursive and transversal signal-processing operations, is applied to a limiter. The limiter introduces an amplitude-dependent attenuation to obtain a modified difference signal. The modified difference signal enters into the recursive and transversal signal-processing operations instead of the original difference signal.