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:
Jan. 05, 1993
Filed:
May. 09, 1991
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 37 ; 358 36 ; 358166 ;
Abstract
Disclosed is a noise reduction circuit in which a YC-separated luminance signal and a YC-separated chromaticity signal are separately processed for noise reduction. In the noise reduction circuit, delay elements incorporated in a YC separation circuit are also used as delay elements in a contour correction circuit so as to attain the desired purpose of noise reduction in both the luminance signal and the chromaticity signal and also the desired purpose of contour correction. Thus, both the noise reduction and the contour correction can be achieved by the noise reduction circuit which is simple in structure and inexpensive.