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:
Jul. 15, 2025
Filed:
Jun. 08, 2022
Amazon Technologies, Inc., Seattle, WA (US);
Aditya Sharadchandra Joshi, Sunnyvale, CA (US);
AMAZON TECHNOLOGIES, INC., Seattle, WA (US);
Abstract
Devices and techniques are generally described for wake word suppression using variable step size of an acoustic echo cancellation (AEC) unit. A reference signal representing an audio stream may be sent to an acoustic echo cancellation (AEC) unit. A microphone may receive an input audio signal and send the input audio signal to the AEC unit. The AEC unit may determine a first set of variable step size (Vss) values over the first time period. Vss values may define a rate at which the AEC unit determines a transfer function between the reference signal and the first input audio signal. A wake-word may be detected during the first time period. A determination may be made that the wake-word is part of the audio output by the loudspeaker based at least in part on the first set of Vss values.