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:
Jun. 06, 2023
Filed:
Jun. 29, 2021
Amazon Technologies, Inc., Seattle, WA (US);
Carlos Renato Nakagawa, San Jose, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
Techniques for improving microphone noise detection and suppression are provided. A method for detecting wind noise corresponding to microphone signals may include determining a phase of a complex coherence of the microphone signals. The phase may be used to determine a presence of wind near the microphones. A derivative of the phase may be used to determine a presence of speech near the microphones. Further, a method for suppressing noise caused by the wind may include determining a gain based on a cross power spectrum of the microphone signals and applying the gain to the microphone signals. The method for suppressing the noise may also include attenuating the microphone signals using a post filter. Based on detection of the wind, microphones which are more exposed to the wind may not be used to process the speech whereas microphones less exposed to the wind may be used to process the speech.