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The Influence of a Filter Shape in Telephone-Based Recognition Module Using PLP Parameterization

  • Josef Psutka
  • Luděk Müller
  • Josef V. Psutka
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2166)

Abstract

This paper concerns an influence of a filter shape and a benefit of the Hertz-Bark transformation to the word error rate (WER) obtained in a telephone-based speech recognition application working with the Perceptually-based Linear Predictive (PLP) parameterization. Five various shapes of filters (rectangular, narrow and wide trapezium, triangular and the classical PLP filter shape [1]) were compared and an effect of a nonlinear frequency transformation between Hertz and generalized Bark axis was explored. Experiments with 100 speakers and with the vocabulary size of 475 words were performed. During all experiments only the zero-gram language model was used to see better an influence of particular variables to changes of the WER.

Keywords

Speech Recognition Recognition Accuracy Critical Band Word Error Rate Recognition Experiment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Hermansky, H.: Perceptual linear predictive (PLP) analysis of speech. J. Acoust. Soc. Amer., 87, (1990), pp.1738–1752.CrossRefGoogle Scholar
  2. 2.
    Hermansky, H.: Should recognisers have ears? Speech Communication, 25, (1998), pp.3–27.CrossRefGoogle Scholar
  3. 3.
    Müller, L., Psutka, J., Šmídl, L.: Design of Speech Recognition Engine.-In: Text, Speech and Dialogue. The 3rd International Workshop on TSD’2000. Berlin, Heidelberg, Springer-Verlag 2000. pp.259–264.Google Scholar
  4. 4.
    Psutka, J., Müller, L., Psutka, J.V.: Comparison of MFCC and PLP Parameterisations in the Speaker Independent Continuous Speech Recognition Task. (prepared for EUROSPEECH2001).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Josef Psutka
    • 1
  • Luděk Müller
    • 1
  • Josef V. Psutka
    • 1
  1. 1.Department of CyberneticsUniversity of West BohemiaPlzeňCzech Republic

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