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. 19, 2009
Filed:
Jul. 21, 2006
Anil N. Patel, Coral Springs, FL (US);
Satish K. Sreenivas Rao, Bangalore, IN;
Krishna Kishore A., Nellore, IN;
Charan M. N., Bangalore, IN;
Anil N. Patel, Coral Springs, FL (US);
Satish K. Sreenivas Rao, Bangalore, IN;
Krishna Kishore A., Nellore, IN;
Charan M. N., Bangalore, IN;
Motorola, Inc., Schaumburg, IL (US);
Abstract
A system () and method () for near-end detection of voice () in speakerphone mode is provided. The method can include determining () a convergence of an adaptive filter (), determining () a dissimilarity between an autocorrelation () of an echo estimate () and an autocorrelation () of a microphone signal () if the adaptive filter has converged, computing () a weighting factor () based on the dissimilarity, applying the weighting factor to a voice activity level () to produce a weighted voice activity level (), comparing () the weighted voice activity level to a constant threshold, and performing () a muting operation in accordance with the comparing for providing half-duplex communication.