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. 10, 1990
Filed:
Dec. 16, 1988
John L Judge, Hillsboro, OR (US);
Magni Systems, Inc., Beaverton, OR (US);
Abstract
A method of sampling a color video signal arranged as a sequence of color frames provides identification of a selected one of the color frames. In a preferred embodiment, the method is directed to sampling a PAL-type color video signal in which each color frame includes multiple video image scan lines that have phase characteristics in one of two polarities. Samples of the color video signal are acquired during preselected first and second successive video image scan lines within one of the color frames in the sequence. The polarities of the samples are then identified to determine whether they correspond to the polarities of analogous video image scan lines during the selected color frame. The selected color frame is identified whenever the polarities of the sampled and the analogous video image scan lines are the same.