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:
Apr. 07, 2009
Filed:
Apr. 13, 2004
Alexis P. Bernard, Palisades, CA (US);
Yifan Gong, Plano, TX (US);
Alexis P. Bernard, Palisades, CA (US);
Yifan Gong, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method for performing time and frequency Signal-to-Noise Ratio (SNR) dependent weighting in speech recognition is described that includes for each period t estimating the SNR to get time and frequency SNR information η; calculating the time and frequency weighting to get γ; performing the back and forth weighted time varying DCT transformation matrix computation MGMto get T; providing the transformation matrix Tand the original MFCC feature othat contains the information about the SNR to a recognizer including the Viterbi decoding; and performing weighted Viterbi recognition b(o).