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:
Jul. 19, 2005
Filed:
May. 31, 2002
Mansour Tahernezhaadi, Naperville, IL (US);
Mansour Tahernezhaadi, Naperville, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method for providing echo cancellation between a first and second communication unit detects an echo condition () between first and second communication units. In addition, the method includes detecting whether a decoded near end audio packet contains a suitable level of background noise to be used as a background noise packet. If so, the current near end encoded audio packet is stored () in a buffer (), such as a circular buffer. Previous near end encoded audio packets () that are also determined to have a suitable level of background noise based on their decoded corresponding counterparts are also stored in the circular buffer. When an echo condition is detected with respect to a current near end encoded audio packet, the method includes substituting a previous near end encoded audio packet stored in the buffer as the next encoded audio packet for transmission ().