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:
Apr. 07, 2026
Filed:
Mar. 17, 2023
Amazon Technologies, Inc., Seattle, WA (US);
Mohamed Mansour, Cupertino, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
A system configured to perform noise suppression using subspace processing. For example, a device may estimate a multichannel noise subspace and use the estimated noise subspace to perform noise suppression while preserving coherence between microphones, enabling further processing (e.g., beamforming, SSL processing). The device may estimate the noise subspace during non-speech activity to determine a set of principal noise components in each frequency band. In some examples, the device may perform time-varying principal component analysis (PCA) processing to adaptively estimate the noise subspace. For example, the device may determine a noise matrix, estimate the noise subspace using dominant eigenvectors of the noise matrix, project the input noisy observations onto the null space of noise to determine a noise estimate and perform noise suppression. To reduce signal distortion, the device may use a signal quality metric as a proxy for speech detection and vary an amount of noise suppression accordingly.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile