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. 21, 2006
Filed:
Oct. 30, 2002
Daniel J. Marchok, Buchanan, MI (US);
Richard C. Younce, Wakarusa, IN (US);
Charles W. K. Gritton, Sterling, VA (US);
Ravi Chandran, South Bend, IN (US);
Daniel J. Marchok, Buchanan, MI (US);
Richard C. Younce, Wakarusa, IN (US);
Charles W. K. Gritton, Sterling, VA (US);
Ravi Chandran, South Bend, IN (US);
Tellabs Operations, Inc., Lisle, IL (US);
Abstract
Methods and apparatus for processing a received voice signal from a variable-delay network by a communications system that has at least one echo canceller. An echo canceller determines delay characteristics that are associated with the received voice signal and correspondingly modifies echo cancellation processing. In a variation of the embodiment of the invention, a first echo canceller sends silence descriptor information to a second echo canceller. The second echo canceller reconstructs a voice signal based upon the silence descriptor information and excitation vector information.