ISCA Archive Eurospeech 1993
ISCA Archive Eurospeech 1993

Impact of dimensionality and correlation of observation vectors in HMM-based speech recognition

Xue Wang, Louis F. M. ten Bosch, Louis C. W. Pols

The dimensionality and correlation between acoustic observation vectors and between the components within the vectors are investigated in terms of their impact on the performance of HMM (hidden Markov model)-based speech recognition. The dimensionality and correlation are manipulated with principal component analysis and linear discrimination analysis, on either a continuous density or a discrete density HMM system.

Keywords: HMM, Speech Recognition, PCA, LDA, VQ