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. 05, 2015
Filed:
May. 03, 2010
Applicants:
Mohamed Krini, Ulm, DE;
Gerhard Schmidt, Ulm, DE;
Inventors:
Mohamed Krini, Ulm, DE;
Gerhard Schmidt, Ulm, DE;
Assignee:
Nuance Communications, Inc., Burlington, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10L 19/09 (2013.01); G10L 25/90 (2013.01); G10L 21/0216 (2013.01);
U.S. Cl.
CPC ...
G10L 25/90 (2013.01); G10L 2021/02168 (2013.01);
Abstract
The invention provides a method for estimating a fundamental frequency of a speech signal comprising the steps of receiving a signal spectrum of the speech signal, filtering the signal spectrum to obtain a refined signal spectrum, determining a cross-power spectral density using the refined signal spectrum and the signal spectrum, transforming the cross-power spectral density into the time domain to obtain a cross-correlation function, and estimating the fundamental frequency of the speech signal based on the cross-correlation function.