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:
Jan. 24, 2006
Filed:
Nov. 15, 2001
Hagai Attias, Seattle, WA (US);
John Carlton Platt, Bellevue, WA (US);
LI Deng, Redmond, WA (US);
Alejandro Acero, Bellevue, WA (US);
Hagai Attias, Seattle, WA (US);
John Carlton Platt, Bellevue, WA (US);
Li Deng, Redmond, WA (US);
Alejandro Acero, Bellevue, WA (US);
Microsoft Corportion, Redmond, WA (US);
Abstract
A probability distribution for speech model parameters, such as auto-regression parameters, is used to identify a distribution of denoised values from a noisy signal. Under one embodiment, the probability distributions of the speech model parameters and the denoised values are adjusted to improve a variational inference so that the variational inference better approximates the joint probability of the speech model parameters and the denoised values given a noisy signal. In some embodiments, this improvement is performed during an expectation step in an expectation-maximization algorithm. The statistical model can also be used to identify an average spectrum for the clean signal and this average spectrum may be provided to a speech recognizer instead of the estimate of the clean signal.