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. 06, 2012
Filed:
Apr. 16, 2007
Markus Buck, Biberach, DE;
Tim Haulick, Blaubeuren, DE;
Martin Roessler, Ulm, DE;
Gerhard Uwe Schmidt, Ulm, DE;
Markus Buck, Biberach, DE;
Tim Haulick, Blaubeuren, DE;
Martin Roessler, Ulm, DE;
Gerhard Uwe Schmidt, Ulm, DE;
Nuance Communications, Inc., Burlington, MA (US);
Abstract
An echo compensation system may remove undesirable audio signals. The echo compensation system may utilize adaptive filters to remove echoes and undesirable signals received by a microphone. The echo compensation system may inhibit adaptation of an adaptive filter when left and right channel audio signals are highly correlated. In a two-channel system, inhibiting adaptation of one of two adaptive filters may reduce computational power requirements, while still removing undesirable signals. In a four-channel system, inhibiting adaptation of all but one of the four adaptive filters may reduce computational power requirements by a greater percentage.