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. 27, 2005
Filed:
Oct. 12, 2001
Applicants:
Levent Demirekler, Columbia, MD (US);
Aleksandar Purkovic, Potomac, MD (US);
Inventors:
Levent Demirekler, Columbia, MD (US);
Aleksandar Purkovic, Potomac, MD (US);
Assignee:
Nortel Networks Limited, , CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M001/00 ;
U.S. Cl.
CPC ...
Abstract
An apparatus and method for echo cancellation that detects and tracks the active regions of the echo channel impulse response rather than the entire echo channel impulse response and uses this sparse model to cancel the echo component of the received signal. Two sets of filter coefficients are used, one to remove and track the active regions and one to detect the active regions.
Demirekler, Levent. (2005). Apparatus and method for echo cancellation (U.S. Patent No. 6980646). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6980646
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile