Speech modelling using cepstral-time feature matrices in hidden Markov models

S. V. Vaseghi, P. N. Conner, B. P. Milner

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9 Citations (Scopus)


Conventional HMMs assume that speech spectral vectors are uncorrelated. The use of information on the temporal evolution of spectral features, within each state, can improve recognition accuracy and produce a more robust recognition system. The authors present experimental results on improvements in speech recognition using cepstral-time matrix units. Experimental evaluation using a spoken digit data base and a spoken alphabet data base, indicates that the use of cepstral-time matrix features in noisy conditions can provide an improvement in recognition of as much as 20% in comparison to a conventional spectral vector comprising of cepstral, delta cepstral and delta-delta cepstral features.
Original languageEnglish
Pages (from-to)317-320
Number of pages4
JournalIEE Proceedings I: Communications, Speech and Vision
Issue number5
Publication statusPublished - Oct 1993

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