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An Overview of Statistical Pattern Recognition Techniques for Speaker Verification



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An Overview of Statistical Pattern Recognition Techniques for Speaker Verification Amin Fazel Student Member IEEE and Shantanu Chakrabartty Senior Member IEEE Michigan State University Abstract Even though the subject of speaker verification has been investigated for several decades now numerous challenges and new opportunities in robust recognition techniques are still being explored In this overview paper we first provide a brief introduction to statistical pattern recognition techniques that are commonly used in speaker verification This includes an overview of some of the basic functional units a speech acquisition and speech feature extraction b speaker modeling and c classification The second part of the paper will present some the commonly used techniques which make real world speaker verification systems robust in degradation due to the presence of ambient noise channel variations aging effects and availability of limited training samples The paper will conclude with discussions on some classical and emerging applications of speaker verification systems along with future trends and research opportunities 1 Introduction Speaker verification is a popular biometric identification technique 1 used for authenticating and monitoring human subjects using their speech signal The method is attractive for two main reasons a it does not require direct contact with the individual thus avoiding the hurdle of perceived invasiveness inherent in many biometric systems like iris and finger print recognition systems b it does not require deployment of specialized signal transducers as microphones are now ubiquitous on most portable devices cellular phones PDAs and laptops According to The Biometric Industry Report Forecasts and Analysis 2006 the market for speaker verification systems is expected to grow to approximately 100 million 2 and this is also evident from the large number of business ventures who are actively supporting product development in speaker verification



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