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. 21, 1987
Filed:
Oct. 24, 1985
Robert A Wargo, Ringoes, NJ (US);
RCA Corporation, Princeton, NJ (US);
Abstract
A hanging dot detector for a video signal processor including a comb filter is disclosed. The respective phases of the signals in the band of frequencies normally containing color representative information of both the comb filtered chrominance and luminance signals are detected. The magnitude of the changes of the respective comb filtered luminance and chrominance phase angle signals over a given time period are compared. A control signal is generated in response to the comparison of the changes over the period of time of the respective phases. A signal coupling unit couples the comb filtered luminance signal to the luminance processing channel. In response to the control signal, the signal coupling means alters the frequency composition of the comb filtered luminance signal so as to eliminate the color representative information. A further embodiment is disclosed to process a complementary-color vertical transition condition.