5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

Speech Recognition in Noisy Environment Using Weighted Projection-Based Likelihood Measure

Won-Ho Shin (1), Weon-Goo Kim (2), Chungyong Lee (1), Il-Whan Cha (1)

(1) Dept. of Electronic Eng., Yonsei Univ., Korea
(2) Dept. of Electrical Eng., Kunsan Univ., Korea

This paper investigates a projection-based likelihood measure that improves speech recognition performance in noisy environment. The projection-based likelihood measure is modified to give the weighting and projection effect and to reduce computational complexity. It is evaluated in sub-model based word recognition using semi-continuous hidden Markov model with speaker independent mode. Experimental results using proposed measure are reported for several performance factors: additive noise and noisy channel environment, various noise signals, and combination with other compensation method. In various noisy environments, performance improvements were achieved compared to the previously existing methods.

Full Paper

Bibliographic reference.  Shin, Won-Ho / Kim, Weon-Goo / Lee, Chungyong / Cha, Il-Whan (1998): "Speech recognition in noisy environment using weighted projection-based likelihood measure", In ICSLP-1998, paper 0434.