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We propose a novel feature mapping approach that is robust to channel mismatch, additive noise and to some extent, non-linear effects attributed to handset transducers. These adverse effects can distort the short-term distribution of the speech features. Some methods have addressed this issue by conditioning the variance of the distribution, but not to the(More)
Speech contains valuable information regarding the traits of speakers. This paper investigates two aspects of this information. The first is automatic detection of non-native speakers and their native language on relatively large data sets. We present several experiments which show how our system outperforms the best published results on both the Fisher(More)
Voice biometrics for user authentication is a task in which the object is to perform convenient, robust and secure authentication of speakers. In this work we investigate the use of state-of-the-art text-independent and text-dependent speaker verification technology for user authentication. We evaluate four different authentication conditions: speaker(More)
Gaussian mixture models (QMM) have become one of the standard acoustic approaches for Language Detection. These models are typically incorporated to produce a log-likelihood ratio (LLR) verification statistic. In this framework, the intersession variability within each language becomes an adverse factor degrading the accuracy. To address this problem, we(More)
The effect of utterance length on the estimation of the likelihood of a speaker has previously seen a brief treatment in past works. In many speaker recognition evaluations, the utterances were typically configured to have a relatively consistent length. This paper investigates the effect of varying enrollment and test utterance lengths on the score(More)
A low-resource, text-independent speaker verification (SV) system with an efficient voice model compression technique is described, including its implementation exclusively with integer arithmetic. We describe and discuss the individual algorithmic steps, the integer implementation issues and its error analysis. Performance of the system is evaluated on(More)
This paper investigates the use of microphone arrays in hands-free speaker recognition systems. Hands-free operation is preferable in many potential speaker recognition applications, however obtaining acceptable performance with a single distant microphone is problematic in real noise conditions. A possible solution to this problem is the use of microphone(More)
The performance of a typical speaker verification system degrades significantly in reverberant environments. This degradation is partly due to the conventional feature extraction/compensation techniques that use analysis windows which are much shorter than typical room impulse responses. In this paper, we present a feature extraction technique which(More)