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Integrated models of signal and background with application to speaker identification in noise

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3 Author(s)
Rose, R.C. ; Speech Res. Dept., AT&T Bell Labs., Murray Hill, NJ, USA ; Hofstetter, E.M. ; Reynolds, D.A.

Discusses the problem of robust parametric model estimation and classification in noisy acoustic environments. Characterization and modeling of the external noise sources in these environments is in itself an important issue in noise compensation. The techniques described provide a mechanism for integrating parametric models of the acoustic background with the signal model so that noise compensation is tightly coupled with signal model training and classification. Prior information about the acoustic background process is provided using a maximum likelihood parameter estimation procedure that integrates an a priori model of the acoustic background with the signal model. An experimental study is presented on the application of this approach to text-independent speaker identification in noisy acoustic environments. Considerable improvement in speaker classification performance was obtained for classifying unlabeled sections of conversational speech utterances from a 16-speaker population under cross-environment training and testing conditions

Published in:

Speech and Audio Processing, IEEE Transactions on  (Volume:2 ,  Issue: 2 )

Date of Publication:

Apr 1994

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