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:
Dec. 08, 2009
Filed:
Oct. 21, 2004
Applicants:
Dieter Schulz, Ottawa, CA;
Graham Thompson, Kanata, CA;
Charn Leung (David) Lo, Ottawa, CA;
Rafik Goubran, Ottawa, CA;
Inventors:
Dieter Schulz, Ottawa, CA;
Graham Thompson, Kanata, CA;
Charn Leung (David) Lo, Ottawa, CA;
Rafik Goubran, Ottawa, CA;
Assignee:
Mitel Networks Corporation, Ottawa, Ontario, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method is provided for discriminating between the case of a single talker with an acoustic reflection and the case of two talkers, regardless of their power levels. The method is implemented in real time by performing a cross-correlation between pairs of average power signals originating from pairs of beamformers. A detection decision is then made based on the value of the cross correlation and its lag.