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:
Aug. 23, 1988
Filed:
Sep. 09, 1986
Hidetoshi Ozaki, Tokyo, JP;
Victor Company of Japan, Yokohama, JP;
Abstract
A carrier chrominance signal processing circuit for use in an apparatus such as a video tape recorder is based upon a feedback comb filter for enhancing the S/N ratio of the playback carrier chrominance signal, and circuits for detecting vertical coherence in a playback luminance signal and carrier chrominance signal respectively. Loop feedback within the feedback comb filter is controlled in accordance with a plurality of specific combinations of conditions of vertical coherence and vertical non-coherence of the carrier chrominance signal and luminance signal, such as to minimize vertical color blurring being produced by the operation of the feedback comb filter while effectively suppressing noise components in the playback carrier chrominance signal.