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:
Aug. 07, 2012
Filed:
Feb. 08, 2008
James C. Frauenthal, Colts Neck, NJ (US);
Michael A. Ramalho, Sarasota, FL (US);
Gary Skrabutenas, Palo Alto, CA (US);
Herbert Wildfeuer, Santa Barbara, CA (US);
James C. Frauenthal, Colts Neck, NJ (US);
Michael A. Ramalho, Sarasota, FL (US);
Gary Skrabutenas, Palo Alto, CA (US);
Herbert Wildfeuer, Santa Barbara, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
An echo canceller apparatus comprises a receive side attenuator coupled in a receive side signal path that is configured to couple from a conference call bridge to a caller; a convolution processor coupled to the receive side signal path at a convolution processor pick-off point; a double-talk detector coupled to the receive side signal path and to a sending side signal path that is configured to couple from the caller to the conference call bridge; and logic coupled to the receive side attenuator which when executed is responsive to a double-talk condition detected by the double-talk detector and operable to determine a level of echo canceled by the convolution processor, to determine an additional amount of attenuation to introduce, and to activate the receive side attenuator to introduce the additional attenuation.