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:
Mar. 03, 2009
Filed:
Jun. 11, 2003
Shuji Yano, Osaka, JP;
Takeshi Hamasaki, Osaka, JP;
Shuji Yano, Osaka, JP;
Takeshi Hamasaki, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A conventional three-dimensional noise reducing device is defective in that after-image degradation increases when effective noise reduction is performed on a signal whose noise level has been increased by signal amplification. The following are provided: an AGC circuitamplifying a video signal; a high frequency coring circuitsplitting the video signal amplified by the AGC circuitinto a plurality of bands in accordance with the spatial frequency thereof, reducing the level of a higher frequency component of the video signal based on a comparison between a first characteristic parameter based on the factor of amplification of the amplifying means and the level of the higher frequency component, and synthesizing the reduced higher frequency component and a component of another band with each other; a subtracterextracting the difference signal between the output of the high frequency coring circuitand a predetermined reference signal; a nonlinear processing circuitreducing the level of the difference signal based on a comparison between the level of the difference signal and a predetermined second characteristic parameter; and a subtractersubtracting the output of the nonlinear processing circuit from the video signal.