Speaker-independent recognition of isolated digits using a weighted cepstral distance
Yoh’ichi Tohkura · The Journal of the Acoustical Society of America · 1985
The cepstral distance has been one of the most efficient spectral distance measures in speech and speaker recognition [S. Furui, IEEE Trans. Acoust. Speech Signal Process. ASSP-29, 254–272 (1981)]. A new weighted cepstral distance measure using LPC derived cepstrum coefficient variability was tested in a speaker-independent English digit recognition system using standard DTW alignment techniques [L. R. Rubiner, S. E. Levinson, A. E. Rosenberg, and J. G. Wilpon, IEEE Trans. Acoust. Speech Signal Process. ASSP-27, 134–141 (1979)]. The results show a recognition accuracy of > 99% for the digits [K. L. Shipley. A. E. Rosenberg, and D. E. Bock, J. Acoust. Soc. Am. Suppl. 1 72, S80 (1982)]. Recognition results using the same data base and the log likelihood LPC distance are about 97.4%. Hence there is a large improvement in performance with the new weighted cepstral distance.