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:
Sep. 26, 2017
Filed:
Sep. 19, 2016
Applicant:
Continental Automotive Systems, Inc., Auburn Hills, MI (US);
Inventors:
Guillaume Lamy, Chicago, IL (US);
Jianming Song, Barrington, IL (US);
Assignee:
Continental Automotive Systems, Inc., Auburn Hills, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10L 21/00 (2013.01); G10L 21/0232 (2013.01); G10L 25/84 (2013.01); G10L 15/00 (2013.01); H04B 15/00 (2006.01); H04R 29/00 (2006.01);
U.S. Cl.
CPC ...
G10L 21/0232 (2013.01); G10L 25/84 (2013.01);
Abstract
Acoustic noise in an audio signal is reduced by calculating a speech probability presence (SPP) factor using minimum mean square error (MMSE). The SPP factor, which has a value typically ranging between zero and one, is modified or warped responsive to a value obtained from the evaluation of a sigmoid function, the shape of which is determined by a signal-to-noise ratio (SNR), which is obtained by an evaluation of the signal energy and noise energy output from a microphone over time.