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:
Sep. 30, 2008
Filed:
Feb. 22, 2005
Masahiro Nako, Yokohama, JP;
Yasutaka Tsuru, Kamakura, JP;
Ryo Hasegawa, Yokohama, JP;
Katsunobu Kimura, Yokohama, JP;
Hiroshi Aoki, Yokohama, JP;
Masahiro Nako, Yokohama, JP;
Yasutaka Tsuru, Kamakura, JP;
Ryo Hasegawa, Yokohama, JP;
Katsunobu Kimura, Yokohama, JP;
Hiroshi Aoki, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A picture quality correction circuit is provided which performs contour correction by grasping features of an input video signal accurately. The correction circuit has a filter circuit for extracting contour components in an inputted video signal, a contour component nonlinear processor for changing amplitudes of the contour components extracted by the filter circuit, an adder for adding outputs of the contour component nonlinear processor and the input video signal, a histogram detection circuit for detecting a histogram of the contour components extracted by the filter circuit, and a control circuit for controlling contour emphasis quantities for the contour component nonlinear processor in accordance with the results of detection by the histogram detection circuit.