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. 22, 2011
Filed:
Dec. 14, 2004
Gerhard Uwe Schmidt, Ulm, DE;
Tim Haulick, Blaubeuren, DE;
Clarence Chu, Vancouver, CA;
David Giesbrecht, Vancouver, CA;
Gerhard Uwe Schmidt, Ulm, DE;
Tim Haulick, Blaubeuren, DE;
Clarence Chu, Vancouver, CA;
David Giesbrecht, Vancouver, CA;
Nuance Communications, Inc., Burlington, MA (US);
Abstract
A system for limiting a received audio signal in a communication system is provided. The receive audio signal is limited prior to being played over a loudspeaker to insure that the loudspeaker output will not be clipped when picked up by a nearby microphone associated with the communication system. By preventing clipping of the loudspeaker output at the microphone, the transfer function of the loudspeaker-enclosure-microphone system remains linear, facilitating accurate echo cancellation in the communication system.