Sixth European Conference on Speech Communication and Technology
(EUROSPEECH'99)

Budapest, Hungary
September 5-9, 1999

The Dependence of Feature Vectors Under Adverse Noise

Woei-Chyang Shieh, Sen-Chia Chang

E000/CCL, Industrial Technology Research Institute, Chutung, Hsinchu, Taiwan

The performance degradation of automatic speech recognition system due to acoustic mismatch in training and testing environment is a severe problem for practical use of speech recognizer [1]. In this paper, we explore the effects of noise on individual speech feature vector statistics, and several feature normalization methods are used to compensate environment influence on feature vectors. We try to find out what kind of normalization is most effective and which feature vectors should be normalized in order to achieve robust features under adverse noise.


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Bibliographic reference.  Shieh, Woei-Chyang / Chang, Sen-Chia (1999): "The dependence of feature vectors under adverse noise", In EUROSPEECH'99, 2395-2398.