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. 03, 1999
Filed:
Feb. 10, 1997
Sonke Struck, Neu Wulmstorf, DE;
Ole Steinfatt, Buchholz, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
For activating or deactivating the comb filter function with pixel precision, a comb filter arrangement including a delay circuit (3) and a first matching circuit (1) having at least two storage cells, these circuits receive a picture signal, having a sequence of individual pixels applied to the comb filter arrangement. The output signals of the delay circuit and the first matching circuit are superposed by a superposition stage (4) supplying a filtered picture signal from its output. The matching circuit (1) is implemented in such a way that it gives the picture signal applied thereto substantially the same amplitude variations as the delay circuit (3), and that the difference between the delay of the output signals from the delay circuit (3) and the matching circuit (1) corresponds to a nominal value. The comb filter arrangement further includes a second matching circuit (2) and a switching circuit (6), the unfiltered picture signal being applied to the input of the second matching circuit (2) which gives the picture signal substantially the same amplitude variations and delays as the first matching circuit (1), and the switching circuit, for switching the comb filter function on and off, alternately deactivating either the second matching circuit (2) or the delay circuit (3).