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Using Post-Classifiers to Enhance Fusion of Low- and High-Level Speaker Recognition

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2 Author(s)
Solewicz, Y.A. ; Bar-Ilan Univ., Ramat-Gan ; Koppel, M.

This paper proposes a method for automatic correction of bias in speaker recognition systems, especially fusion-based systems. The method is based on a post-classifier which learns the relative performance obtained by the constituent systems in key trials, given the training and testing conditions in which they occurred. These conditions generally reflect train/test mismatch in factors such as channel, noise, speaker stress, etc. Results obtained with several state-of-the-art systems showed up to 20% decrease in EER compared to ordinary fusion in the NIST'05 Speaker Recognition Evaluation.

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Audio, Speech, and Language Processing, IEEE Transactions on  (Volume:15 ,  Issue: 7 )