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:
Aug. 17, 2010
Filed:
Dec. 30, 2005
Applicants:
Alan V. Mccree, Acton, MA (US);
Takahiro Unno, Richardson, TX (US);
Thierry Le Gall, Guipavas, FR;
Sebastien Guiriec, Cagnes sur Mer, FR;
Inventors:
Alan V. McCree, Acton, MA (US);
Takahiro Unno, Richardson, TX (US);
Thierry Le Gall, Guipavas, FR;
Sebastien Guiriec, Cagnes sur Mer, FR;
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M 9/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
Hands-free phones with echo cancellation using dual filters, one fast adapting filter and one slow adapting filter; the choice of filters includes switching with hysteresis from recent performance, and the fast adapting filter has step size control to limit relative filter update energy and the slow adapting filter limits filter divergence.