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:
Dec. 06, 1988
Filed:
Dec. 02, 1986
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a judgement circuit for an adaptive filter for use in a color television system, sample values of a composite video signal are obtained by sampling the composite video signal at a predetermined sampling frequency in synchronism with a horizontal scanning frequency in such a manner that the corresponding sample points are arranged in a grating on the screen. A horizontal filter receives the sample values corresponding to a first sample point and a second and a third sample points positioned at the left of and at the right of the first sample point. A vertical filter receives the sample values corresponding to the first sample point and a fourth and a fifth sample points positioned over and under the first sample point. The variation of the signal in the vertical direction and the variation of the signal in the vertical direction are detected, and are compared. One of the output of the horizontal filter and the output of the vertical filter is selected in accordance with the result of the comparison.