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:
Dec. 20, 1988
Filed:
Feb. 12, 1988
Masaji Yoshida, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
In a noise reducing circuit for a video signal comprising a first subtractor (2), a delay line (3), a second subtractor (4), a non-linear circuit (7) having a full-wave rectification circuit (7b) and a gain control circuit (7a), the gain control circuit (7a) controls a gain such that an output signal level derived from the non-linear circuit (7) increases in accordance with the increase in an output signal from the full-wave rectification circuit (7b) when the output signal level of the second subtractor (4) is within a determined extent, and that the output signal level derived from the non-linear circuit (7) decreases in accordance with the increase in the output signal from the full-wave rectification circuit (7b) when the output signal level of the second subtractor (4) is out of the determined extent.