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. 19, 2026
Filed:
Dec. 05, 2022
Amazon Technologies, Inc., Seattle, WA (US);
Karim Helwani, Mountain View, CA (US);
Erfan Soltanmohammadi, Silver Spring, MD (US);
Michael Mark Goodwin, Scotts Valley, CA (US);
Arvindh Krishnaswamy, Palo Alto, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
Far-end audio samples may be received corresponding to far-end audio that is output from one or more audio output components. Near-end audio samples may be received corresponding to near-end audio that is captured by one or more audio input components. A plurality of acoustic path estimates and a plurality of clock skew estimates may be calculated in an alternating order, using a state-space model, based at least in part on the far-end audio samples and the near-end audio samples. A first acoustic path estimate and a first clock skew estimate may be used to calculate a second acoustic path estimate. A first portion of the far-end audio may be filtered with the second acoustic path estimate to generate a replica of echo in the first portion of the far-end audio. The replica of the echo may be removed from a corresponding second portion of the near-end audio.