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:
May. 26, 2009
Filed:
Jun. 11, 2005
Adil Benyassine, Irvine, CA (US);
Nick J. Lavrov, Mission Viejo, CA (US);
Adil Benyassine, Irvine, CA (US);
Nick J. Lavrov, Mission Viejo, CA (US);
Mindspeed Technologies, Inc., Newport Beach, CA (US);
Abstract
There is provided a method of detecting an infinite echo return loss (ERL) in an echo cancellation system while in a finite ERL mode. The method comprises determining a running mean attenuation by the echo cancellation system, determining a ratio of an echo signal to a near-end noise ratio (ENR), defining an infinite ERL threshold (TH) as a function of the ENR, and switching to an infinite ERL mode as a function of the running mean attenuation and the TH. The running mean attenuation can be enhanced echo return loss (ERLE), and the higher the ENR the higher the THand the lower the ENR the lower the TH. The switching can further be a function of an energy distribution, where the switching switches to the infinite ERL mode based on a non-localized energy distribution over an echo path delay for a predetermined period of time.