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:
Apr. 20, 2004
Filed:
May. 12, 2000
Applicant:
Inventor:
Gad Azriel, Holon, IL;
Assignee:
3Com Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 3/20 ;
U.S. Cl.
CPC ...
H04B 3/20 ;
Abstract
An apparatus for and a method of remote echo cancellation in a packet based telephony system. Echo cancellation algorithms normally performed on the local end of a connection, are performed instead by the remote end of the connection. Alternatively, the echo cancellation algorithms are performed for both the local and remote ends of a connection on a remote device. In the former case, the remote endpoint estimates the echo function of the local endpoint using audio and timing synchronization data corresponding to the actual audio played at the local endpoint. Using this information, the remote endpoint is able to accurately perform echo cancellation.