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. 27, 2001
Filed:
Jul. 01, 1999
Katsunobu Kimura, Chigasaki, JP;
Takaaki Matono, Yokohama, JP;
Haruki Takata, Yokohama, JP;
Tatsuo Nagata, Fujisawa, JP;
Masato Sugiyama, Yokohama, JP;
Yasutaka Tsuru, Yokohama, JP;
Koichi Sudo, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A noise reduction signal processing apparatus for reducing noises accurately, such as for use in a display apparatus for displaying a video signal, has a median filter (,) which receives the video signal, and which executes a filter processing on the inputted video signal and outputs a reference signal; a subtracter (,) which is connected with the median filter (,), and which outputs a difference signal that indicates a difference between a reference signal outputted from the median filter (,) and the video signal; a minimum value detection circuit (,) which outputs the difference signal from the subtracter (,) or a limitation value, whichever is smaller, as a minimum value signal; and an adder (,) which adds a noise reduction signal obtained on the basis of the minimum value signal output from the minimum value detection circuit (,) and the video signal.