A CELP-Based Speech-Model Process

  • M. Reza Serafat
Part of the Applied and Numerical Harmonic Analysis book series (ANHA)


A new Speech-Model Process (SMP) is proposed as a test signal for speech processing applications to avoid several shortcomings (e.g., speaker dependencies) of using natural speech as a test signal. The generation procedure for this SMP, which is based on a modified CELP-structure, is presented. The controlling part of this SMP involves several Markov chains to adapt the time-varying properties of the process to those of natural speech. Furthermore, we show that this signal can also be used as a suitable test signal for telephone speech-applications, if we limit it to the telephone frequency-band.


Probability Density Function Natural Speech Gain Term Stochastic Excitation Gain Vector 
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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • M. Reza Serafat
    • 1
  1. 1.Institute for Network & System TheoryUniversity KielGermany

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