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:
Feb. 24, 2015
Filed:
Nov. 14, 2011
Jes Thyssen, San Juan Capistrano, CA (US);
Huaiyu Zeng, Red Bank, NJ (US);
Juin-hwey Chen, Irvine, CA (US);
Nelson Sollenberger, Farmingdale, NJ (US);
Xianxian Zhang, San Diego, CA (US);
Jes Thyssen, San Juan Capistrano, CA (US);
Huaiyu Zeng, Red Bank, NJ (US);
Juin-Hwey Chen, Irvine, CA (US);
Nelson Sollenberger, Farmingdale, NJ (US);
Xianxian Zhang, San Diego, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Multi-channel noise suppression systems and methods are described that omit the traditional delay-and-sum fixed beamformer in devices that include a primary speech microphone and at least one noise reference microphone with the desired speech being in the near-field of the device. The multi-channel noise suppression systems and methods use a blocking matrix (BM) to remove desired speech in the input speech signal received by the noise reference microphone to get a 'cleaner' background noise component. Then, an adaptive noise canceler (ANC) is used to remove the background noise in the input speech signal received by the primary speech microphone based on the 'cleaner' background noise component to achieve noise suppression. The filters implemented by the BM and ANC are derived using closed-form solutions that require calculation of time-varying statistics of complex frequency domain signals in the noise suppression system.