Abstract
In some situations the quality of the signals involved in a speaker verification trial is not as good as needed to take a reliable decision. In this work, we use Bayesian networks to model the relations between the speaker verification score, a set of speech quality measures and the trial reliability. We use this model to detect and discard unreliable trials. We present results on the NIST SRE2010 dataset artificially degraded with different types and levels of additive noise and reverberation. We show that a speaker verification system, that is well calibrated for clean speech, produces an unacceptable actual DCF on the degraded dataset. We show how this method can be used to reduce the actual DCF to values lower than 1. We compare results using different quality measures and Bayesian network configurations.
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Villalba, J., Lleida, E., Ortega, A., Miguel, A. (2012). Reliability Estimation of the Speaker Verification Decisions Using Bayesian Networks to Combine Information from Multiple Speech Quality Measures. In: Torre Toledano, D., et al. Advances in Speech and Language Technologies for Iberian Languages. Communications in Computer and Information Science, vol 328. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35292-8_1
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DOI: https://doi.org/10.1007/978-3-642-35292-8_1
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