Improving discrimination of confusable words using the divergence measure

Philipos Loizou, Andreas Spanias

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


This paper describes the use of the divergence measure as a criterion for finding a transformation matrix which will map the original speech observations onto a subspace with more discriminative ability than the original. A gradient-based algorithm is also proposed to compute the transformation matrix efficiently. The subspace approach is used as a preprocessing step in a hidden Markov model (HMM) based system to enhance discrimination of acoustically similar pairs of words. This approach is compared with standard linear discriminant analysis (LDA) techniques and shown to yield as much as 4.5% improvement. The subspace approach is also applied successfully to a more general recognition problem, i.e., discrimination of K confusable words, using the average divergence measure.

Original languageEnglish (US)
Pages (from-to)1106-1111
Number of pages6
JournalJournal of the Acoustical Society of America
Issue number2
StatePublished - Feb 1997

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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