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. 29, 2017
Filed:
Dec. 18, 2012
Applicant:
Motorola Solutions, Inc, Schaumburg, IL (US);
Inventors:
Yi Gao, Sichuan, CN;
Lu-Ming Chen, Sichuan, CN;
William M Kushner, Arlington Heights, IL (US);
Yu Liu, Sichuan, CN;
Li Xiao, Sichuan, CN;
Assignee:
MOTOROLA SOLUTIONS, INC., Chicago, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 7/015 (2006.01); G10L 21/0208 (2013.01); G10L 21/0232 (2013.01); H04M 9/08 (2006.01);
U.S. Cl.
CPC ...
H04B 7/015 (2013.01); G10L 21/0208 (2013.01); G10L 21/0232 (2013.01); G10L 2021/02082 (2013.01); H04M 9/082 (2013.01);
Abstract
Embodiments of an acoustic feedback suppressor determine the energy in each of a plurality of frequency bands of frames of an audio signal. The energy in each of the plurality of frequency bands is compared to characteristic of human voice to determine that a present frame contains content that is not likely human voice and exhibits a characteristic of feedback. Upon determining that feedback is occurring, an adaptive gain reduction is applied to the band in which feedback is suspected to be occurring.