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:
Mar. 20, 1985
Akira Hirota, Chigasaki, JP;
Takuya Tsushima, Ayase, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A video signal reproducing apparatus comprises a reproducing circuit for reproducing from a recording medium a pre-recorded video signal having field correlation and having a predetermined band, and a noise reduction circuit supplied with a reproduced video signal from the reproducing circuit for essentially reducing noise included within the reproduced video signal. The noise reduction circuit comprises first and second subtracting circuits supplied with the reproduced video signal from the reproducing circuit, a one-field delay circuit for delaying an output of the first subtracting circuit by a predetermined time period and for supplying a delayed signal to the second subtracting circuit, which predetermined time period is equal to one field or a time period which is a natural number multiple of one horizontal scanning period and is extremely close to one field, and a limiter for amplitude-limiting an output of the second subtracting circuit and for supplying an amplitude limited signal to the first subtracting circuit. The output of the first subtracting circuit is obtained as an output of the noise reduction circuit. The one-field delay circuit has a transmission band which is narrower than a band of the reproduced video signal.