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. 04, 2010
Filed:
May. 12, 2005
Carlo Murgia, Aliso Viejo, CA (US);
Jeffrey D. Klein, Irvine, CA (US);
Adil Benyassine, Irvine, CA (US);
Eyal Shlomot, Long Beach, CA (US);
Yang Gao, Mission Viejo, CA (US);
Carlo Murgia, Aliso Viejo, CA (US);
Jeffrey D. Klein, Irvine, CA (US);
Adil Benyassine, Irvine, CA (US);
Eyal Shlomot, Long Beach, CA (US);
Yang Gao, Mission Viejo, CA (US);
Mindspeed Technologies, Inc., Newport Beach, CA (US);
Abstract
A method of masking a residual echo signal by an echo canceller is provided. The method comprises receiving a far-end signal, adjusting filter coefficients of an adaptive filter in response to the far-end signal, generating an echo model signal based on the far-end signal using the adaptive filter, receiving a near-end signal, subtracting the echo model signal from the near-end signal to generate an output signal, defining a spectral mask based on the near-end signal, wherein the spectral mask is indicative of near-end spectral peaks and near-end spectral valleys, de-emphasizing the output signal in spectral regions of the near-end spectral peaks, and emphasizing the output signal in spectral regions of the near-end spectral valleys, wherein the de-emphasizing occurs during filter coefficients determination for the adaptive filter. A weighted filter may perform the de-emphasizing and the emphasizing operations, where the weighted filter uses medium term spectral characteristics of the near-end signal.