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:
Jun. 11, 2013
Filed:
Jan. 08, 2010
Kwan Truong, Alpharetta, GA (US);
Peter Chu, Lexington, MA (US);
Michael Pocino, Marietta, GA (US);
John Allen, Dripping Springs, TX (US);
Kwan Truong, Alpharetta, GA (US);
Peter Chu, Lexington, MA (US);
Michael Pocino, Marietta, GA (US);
John Allen, Dripping Springs, TX (US);
Polycom, Inc., San Jose, CA (US);
Abstract
A multimedia conferencing system includes a loud speaker system, one or more microphones for receiving a local audio signal and a remote audio signal, a state machine and an echo canceller that operates in conjunction with two reference signals to remove substantially all of a feedback signal component in the local audio signal that results from reinforcing and playing the local audio signal over the loud speaker system. The state machine operates to detect that only the local audio is active, and if so controls the operation of the echo canceller such that only the feedback component of the local audio signal is removed and the local audio signal is not suppressed.