A fast, reliable, yet inexpensive automatic speaker verification system based on the Texas Instruments TMS32020 digital signal processor (DSP) is described. This system uses a novel speaker verification algorithm which operates in 75% of real time and requires two to three seconds of unconstrained speech to perform accurate authentication. Experimental results on a population of 90 speakers are also given. The rule implemented in the final prototype uses a sequential strategy to arrive at the authentication decision. Hence, the users of the system are required to speak until a decision with high confidence is announced.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Attili et al. (2003) studied this question.