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. 04, 1990
Filed:
Feb. 25, 1988
Mitsubishi Denki Kabushiki Kaisha, Chiyoda, JP;
Abstract
A filtering circuit separates from the composite color television signal both the luminance and chrominance signals that includes a delay circuit for delaying the composite color video signal. A first filter is also provided which is responsive to the video signal and the delayed video signal and extracts a chrominance signal corresponding to a frequency component of a color subcarrier in a vertical direction. A second filter is used which is responsive to at least the delayed video signal and extracts a chrominance signal corresponding to a frequency component of the color subcarrier in a horizontal direction. Lastly, a third filter is utilized which is responsive to the video signal and the delayed video signal and extracts a chrominance signal corresponding to a frequency component of the color subcarrier in both the vertical and horizontal direction. This filter circuit then determines, in response to the video signal and the delayed video signal, a correlation in a televised picture in the vertical and horizontal directions, respectively. In accordance with this determination, a switching circuit selects one of the chrominance signals extracted, respectively, by the first to third filters as an output.