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. 04, 2023
Filed:
Oct. 05, 2021
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.