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. 26, 1988
Filed:
Apr. 01, 1986
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358167 ; 358 36 ;
Abstract
A video signal processing apparatus incorporates a 1H or 2H delay circuit, wherein H is a horizontal synchronization period. The output of the delay circuit is fed back to the input thereof so as to average the noise, thus raising the signal S/N ratio. The feedback line includes a nonlinear processing circuit which has a small gain when the signal input has a low vertical correlation, whereby the signal S/N ratio is improved without causing the delay of the color signal in the vertical direction nor the deteriorated resolution of the luminance signal.