4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

A Codebook Adaptation Algorithm for SCHMM Using Formant Distribution

Tae Young Yang (1), Won Ho Shin (1), Weon Goo Kim (2), Dae Hee Youn (1)

(1) ASSP Lab. Dept. of Electronics Eng. Yonsei Univ., Seoul, Korea
(2) Dept. of Electronical Eng. Kunsan National Univ., Chonbook, Korea

This paper describes a codebook adaptation process improving the performance of speaker adaptation. The proposed method is performed prior to Bayesian speaker adaptation method using the formant distribution of adaptation data. The reference codebook is adapted to represent the formant distribution of a new speaker. The average recognition rate of Bayesian adaptation is improved from 91.4% to 95.1% using the proposed method. The proposed method is effective particularly when there exists a large mismatch between the reference codebook and a target speaker in feature space. In this cases the average recognition rate is 95.0% while 89.9% is obtained when only Bayesian adaptation is performed.

Full Paper

Bibliographic reference.  Yang, Tae Young / Shin, Won Ho / Kim, Weon Goo / Youn, Dae Hee (1996): "A codebook adaptation algorithm for SCHMM using formant distribution", In ICSLP-1996, 1085-1088.