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:
May. 29, 2012
Filed:
Jul. 06, 2007
Tsuyoki Nishikawa, Osaka, JP;
Takeo Kanamori, Osaka, JP;
Koichiro Mizushima, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A multichannel echo canceller according to the present invention includes an echo cancellation section which receives loudspeaker input signals sp, spincluding a second acoustic signal to be respectively inputted to a plurality of loudspeakersprovided in a first location and detection signals m, mdetected by a plurality of microphonesprovided in the first location; separates a first acoustic signal and a second acoustic signal, which are included in the detection signals m, m, by performing signal processing based on an independent component analysis; cancels as an echo the second acoustic signal, which is included in the detection signals m, m, by outputting only the separated first acoustic signal to a plurality of loudspeakersprovided in a second location.