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:
Aug. 16, 2022
Filed:
Jul. 17, 2019
Google Llc, Mountain View, CA (US);
Alexandre Loiko, Mountain View, CA (US);
Marcus Wirebrand, Huddinge, SE;
Samuel Martin Zackrisson, Mountain View, CA (US);
Ivo Creusen, Stockholm, CA;
Mans Gustaf Sebastian Ullberg, Mountain View, CA (US);
Alessio Bazzica, Järfälla, SE;
Daniel Johansson, Mountain View, CA (US);
Google LLC, Mountain View, CA (US);
Abstract
A method () includes receiving a microphone audio signal () and a playout audio signal (), and determining a frequency representation () of the microphone audio signal and a frequency representation of the playout audio signal. For each frequency representation, the method also includes determining features () based on the frequency representation. Each feature corresponds to a pair of frequencies () of the frequency representation and a period of time between the pair of frequencies. The method also includes determining that a match () occurs between a first feature based on the frequency representation of the microphone audio signal and a second feature based on the frequency representation of the playout audio signal, and determining that a delay value () between the first feature and the second feature corresponds to an echo within the microphone audio signal.