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. 18, 2014
Filed:
Dec. 08, 2006
Applicants:
Dieter Schulz, Dunrobin, CA;
Yonghua Fang, Ottawa, CA;
Renee Johnston, Dunrobin, CA;
Mirjana Popovic, Ottawa, CA;
Inventors:
Dieter Schulz, Dunrobin, CA;
Yonghua Fang, Ottawa, CA;
Renee Johnston, Dunrobin, CA;
Mirjana Popovic, Ottawa, CA;
Assignee:
Mitel Networks Corporation, Ottawa, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M 9/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An echo canceling system has an adaptive filter connected to an echo source, for canceling echo from an echo path. A fixed echo conditioning filter is connected in series with the adaptive filter, intermediate the echo source and the adaptive filter. The fixed echo conditioning filter cancels the constant part of the echo path using a measured impulse response of the echo path.