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. 26, 2021
Filed:
Mar. 28, 2019
Applicant:
Amazon Technologies, Inc., Seattle, WA (US);
Inventors:
Anshuman Ganguly, Cambridge, MA (US);
Srivatsan Kandadai, San Jose, CA (US);
Wontak Kim, Watertown, MA (US);
Assignee:
Amazon Technologies, Inc., Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10L 25/84 (2013.01); H04R 3/00 (2006.01); H04R 1/40 (2006.01); G10L 15/22 (2006.01);
U.S. Cl.
CPC ...
G10L 25/84 (2013.01); G10L 15/22 (2013.01); H04R 1/406 (2013.01); H04R 3/005 (2013.01);
Abstract
A voice-controlled device includes a beamformer for determining audio data corresponding to one or more directions and a beam selector for selecting in which direction a source of target audio lies. The device determines magnitude spectrums for each beam and for each frequency bin in each beam for each frame of audio data. The device determines frame-by-frame changes in the magnitude and filters the changes to smooth them. The device selects the beam having the greatest smoothed change in magnitude as corresponding to speech.