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Speech & natural language publications September 1, 2014

A Deep Neural Network Speaker Verification System Targeting Microphone Speech

Mitchell McLaren

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Lei, Y., Ferrer, L., McLaren, M., & Scheffer, N. (2014). A deep neural network speaker verification system targeting microphone speech. In Fifteenth annual conference of the international speech communication association.

Abstract

We recently proposed the use of deep neural networks (DNN) in place of Gaussian Mixture models (GMM) in the i-vector extraction process for speaker recognition.  We have shown significant accuracy improvements on the 2012 NIST speaker recognition evaluation (SRE) telephone conditions.  This paper explores how this framework can be effectively used on the microphone speech conditions of the 2012 NIST SRE.  In this new framework, the verification performance greatly depends on the data used for training the DNN. We show that training the DNN using both telephone and microphone speech data can yield significant improvements.  An in-depth analysis of the influence of telephone speech data on the microphone conditions is also shown for both the DNN and GMM systems.  We conclude by showing that the the GMM system is always outperformed by the DNN system on the telephone-only and microphone-only conditions, and that the new DNN / i-vector framework can be successfully used providing a good match in the training data.

Index Terms: Deep neural networks, Microphone data, Speaker recognition, i-vectors

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