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. 19, 2014
Filed:
Apr. 04, 2011
Asif I. Mohammad, San Diego, CA (US);
Kwokleung Chan, San Diego, CA (US);
Ian Ernan Liu, San Diego, CA (US);
Erik Visser, San Diego, CA (US);
Dinesh Ramakrishnan, San Diego, CA (US);
Asif I. Mohammad, San Diego, CA (US);
Kwokleung Chan, San Diego, CA (US);
Ian Ernan Liu, San Diego, CA (US);
Erik Visser, San Diego, CA (US);
Dinesh Ramakrishnan, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A method for echo cancellation and noise suppression is disclosed. Linear echo cancellation (LEC) is performed for a primary microphone channel on an entire frequency band or in a range of frequencies where echo is audible. LEC is performed on one or more secondary microphone channels only on a lower frequency range over which spatial processing is effective. The microphone channels are spatially processed over the lower frequency range after LEC. Non-linear noise suppression post-processing is performed on the entire frequency band. Echo post-processing is performed on the entire frequency band.