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. 20, 2016
Filed:
Dec. 25, 2013
Nec Corporation, Minato-ku, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
Provided are a noise reduction system that highly precisely estimates noise contained in an input signal and highly precisely reduces the noise contained in the input signal using the estimated noise, a speech detection system, a speech recognition system, a noise reduction method, and a noise reduction program. The noise reduction system includes: a first noise estimating unit () that estimates a stationary noise component contained in a first input signal; a first noise reduction unit () that reduces the stationary noise component from the first input signal; a second noise estimating unit () that re-estimates a stationary noise component contained in the first input signal; a third noise estimating unit () that estimates a second non-stationary noise component including a sum of a stationary noise component and a non-stationary noise component contained in the first input signal; an estimated noise combining unit () that estimates a stationary noise component and a second non-stationary noise component contained in the first input signal; and a second noise reduction unit () that reduces the stationary noise component and the second non-stationary noise component contained in the first input signal.