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:
Oct. 27, 2015
Filed:
Apr. 24, 2014
Applicant:
Amazon Technologies, Inc., Reno, NV (US);
Inventors:
Robert Ayrapetian, Morgan Hill, CA (US);
Arnaud Jean-Louis Charton, Livermore, CA (US);
Yuwen Su, Cupertino, CA (US);
Assignee:
Amazon Technologies, Inc., Seattle, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M 3/00 (2006.01); H04L 25/03 (2006.01); H04B 3/23 (2006.01); H04M 9/08 (2006.01);
U.S. Cl.
CPC ...
H04M 3/002 (2013.01); H04B 3/23 (2013.01); H04L 2025/03687 (2013.01); H04M 9/082 (2013.01);
Abstract
Features are disclosed for estimating a noise level using a variable step size. An acoustic echo canceller (AEC) may be configured to perform echo cancellation. The acoustic echo canceller may determine an estimated echo using a playback signal. The acoustic echo canceller also may determine an estimated error using the estimated echo and a microphone signal. A variable step size may be determined using the estimated error and the microphone signal. Noise reduction may be performed using the variable step size.