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:
Sep. 15, 1987
Filed:
Oct. 01, 1985
Kirk A Law, East Windsor, NJ (US);
Leopold A Harwood, Bridgewater, NJ (US);
RCA Corporation, Princeton, NJ (US);
Abstract
A vertical transition processor for a comb filter detects the presence of a complementary-color vertical transition. A detector is provided for detecting if the color subcarrier on adjacent lines has the same phase angle and amplitude. This indicates the presence of a complementary-color vertical transition. If a complementary-color vertical transition is detected, then the comb filtered luminance and chrominance signals are selectively coupled to the luminance and chrominance processing channels so that the chrominance processing channel receives primarily color information and the color information is excluded from the luminance processing channel. This counteracts the adverse effects of the complementary-color vertical transition.