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:
Feb. 05, 1991
Filed:
Jun. 19, 1989
Hidemitsu Nikoh, Tokyo, JP;
Munenori Kobayashi, Tokyo, JP;
NEC Corporation, , JP;
Abstract
In a digital video signal compensation circuit, a high frequency component of a digital video signal is obtained in a high-pass filter, and the high frequency component is compared in a comparator with a threshold signal, thereby determining whether the high frequency component is an edge component or a noise component. Where the high frequency component is the edge component, the high frequency component is added in an adder to the digital video signal, and where the high frequency component is a noise component, the high frequency component is subtracted in the adder from the digital video signal in accordance with the sign conversion of the high frequency component. Therefore, only one adder is provided in the digital video signal compensation circuit. That is, it is not necessary that an adder and a subtracter are provided therein.