EUROSPEECH 2001 Scandinavia
7th European Conference on Speech Communication and Technology

Aalborg, Denmark
September 3-7, 2001


Analysis of Speaker Variability

Chao Huang (1), Tao Chen (2), Stan Li (1), Eric Chang (1), Jianlai Zhou (1)

(1) Microsoft Research China, China
(2) Tsinghua Univ., China

Analysis and modeling of speaker variability, such as gender, accent, age, speech rate, and phones realizations, are important issues in speech recognition. It is known that existing feature representations describing speaker variations can be of very high dimension. In this paper, we introduce two powerful multivariate statistical analysis methods, namely, principal component analysis (PCA) and independent component analysis (ICA), as tools for analysis of such variability and extraction of low dimensional feature representation. Our findings are the following: (1) the first two principal components correspond to the gender and accent, respectively. The result that the second component corresponding to the accent has never been reported before, to the best of our knowledge. (2) It is shown that ICA based features yield better classification performance than PCA ones. Using 2-dimensional ICA representation, we achieved about 6.1% and 13.3% error rate in gender and accent classification, respectively, for 980 speakers.

Full Paper

Bibliographic reference.  Huang, Chao / Chen, Tao / Li, Stan / Chang, Eric / Zhou, Jianlai (2001): "Analysis of speaker variability", In EUROSPEECH-2001, 1377-1380.