Phonetically optimized speaker modeling for robust speaker recognition

International Journal
2009-09-01 14:23
Authors : Bong-Jin Lee, Jeung-Yoon Choi, Hong-Goo Kang

Year : 2009

Publisher / Conference : The Journal of the Acoustical Society of America

Volume : 126, issue 3

This paper proposes an efficient method to improve speaker recognition performance by dynamically controlling the ratio of phoneme class information. It utilizes the fact that each phoneme contains different amounts of speaker discriminative information that can be measured by mutual information. After classifying phonemes into five classes, the optimal ratio of each class in both training and testing processes is adjusted using a non-linear optimization technique, i.e., the Nelder–Mead method. Speaker identification results verify that the proposed method achieves 18% improvement in terms of error rate compared to a baseline system.
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