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:
May. 25, 2010
Filed:
Feb. 16, 2004
Jian Wu, Hong Kong, CN;
James G. Droppo, Duvall, WA (US);
LI Deng, Sammamish, WA (US);
Alejandro Acero, Bellevue, WA (US);
Jian Wu, Hong Kong, CN;
James G. Droppo, Duvall, WA (US);
Li Deng, Sammamish, WA (US);
Alejandro Acero, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A method and apparatus identify a clean speech signal from a noisy speech signal. To do this, a clean speech value and a noise value are estimated from the noisy speech signal. The clean speech value and the noise value are then used to define a gain on a filter. The noisy speech signal is applied to the filter to produce the clean speech signal. Under some embodiments, the noise value and the clean speech value are used in both the numerator and the denominator of the filter gain, with the numerator being guaranteed to be positive.