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. 12, 2002
Filed:
Aug. 12, 1999
Mansour Tahernezhaadi, Naperville, IL (US);
Michael J. Kirk, Mount Prospect, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
In a communication system ( ), a first echo return loss through communication system ( ) associated with a first call connection between a caller ( ) and a first caller ( ) is estimated. A second echo return loss associated with a second call connection between caller ( ) and a second caller ( ) is estimated. The call connection may be switching from the first call connection to the second call connection after estimating the first echo return loss, and from the second call connection to the first call connection after estimating the second echo return loss. Echo generated in the first call connection is cancelled based on at least the first echo return loss by an echo canceller in communication system ( ) after switching from the second call connection to the first call connection.