State-of-the-Art Performance in Text-Independent Speaker Verification Through Open-Source Software

Authors:
B. G.B. Fauve;D. Matrouf;N. Scheffer;J. -F. Bonastre;J. S.D. Mason
Affiliations:
Swansea Univ., Swansea;-;-;-;-
Venue:
IEEE Transactions on Audio, Speech, and Language Processing
Year:
2007

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Abstract

This paper illustrates an evolution in state-of-the-art speaker verification by highlighting the contribution from newly developed techniques. Starting from a baseline system based on Gaussian mixture models that reached state-of-the-art performances during the NIST'04 SRE, final systems with new intersession compensation techniques show a relative gain of around 50%. This work highlights that a key element in recent improvements is still the classical maximum a posteriori (MAP) adaptation, while the latest compensation methods have a crucial impact on overall performances. Nuisance attribute projection (NAP) and factor analysis (FA) are examined and shown to provide significant improvements. For FA, a new symmetrical scoring (SFA) approach is proposed. We also show further improvement with an original combination between a support vector machine and SFA. This work is undertaken through the open-source ALIZE toolkit.