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:
Nov. 27, 2007
Filed:
Apr. 11, 2002
Shingo Shimazaki, Kanagawa, JP;
Taku Kihara, Kanagawa, JP;
Shingo Shimazaki, Kanagawa, JP;
Taku Kihara, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An edge enhancement circuit uses bandpass filters to separate an original video signal into low-, middle- and high-frequency band edge components which will be supplied to waveform shaping circuits. Each of the waveform shaping circuits detects an amplitude peak level of the edge component, generates a gain coefficient based on the peak level, and multiplies the original video signal by the gain coefficient. The results of multiplication are added together to generate a final detail signal. Thus, the edge enhancement circuit amplifies the amplitude of the edge component having a frequency approximate to the spatial frequency of the video signal to provide an edge enhancement based on a frequency characteristic corresponding to the spatial frequency of the video signal.