Comparative study of speaker verification techniques based on vector quantization, sphericity models and dynamic time warping∗

Three simple speaker verification techniques based on vector quantization, sphericity models and dynamic time warping, respectively, are developed and tested using the same experimental protocol. Two types of feature vectors, the linear prediction derived cepstral coefficients and the melfrequency cepstral coefficients are considered. The efficiency of the combination of the type of acoustic analysis and the verification technique is quantitatively measured through the achieved equal error rate.