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:
Feb. 22, 2022
Filed:
Sep. 17, 2019
Applicant:
Amazon Technologies, Inc., Seattle, WA (US);
Inventors:
Srivatsan Kandadai, San Jose, CA (US);
Amit Singh Chhetri, Sunnyvale, CA (US);
Assignee:
Amazon Technologies, Inc., Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 3/23 (2006.01); G01S 13/50 (2006.01); G01S 13/58 (2006.01); H03H 21/00 (2006.01); H04M 9/08 (2006.01);
U.S. Cl.
CPC ...
H04B 3/231 (2013.01); G01S 13/505 (2013.01); G01S 13/583 (2013.01); H03H 21/0043 (2013.01); H04M 9/082 (2013.01); H03H 2021/0061 (2013.01);
Abstract
A device capable of autonomous motion includes a residual echo suppressor for suppressing echoes caused by an output reference signal. When the device outputs audio while moving with a velocity, it may receive echoes that are Doppler-shifted due to the motion. The residual echo suppressor generates estimated residual error data based on phase-shifted reference data to account for and suppress the Doppler-shifted echoes.