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KMID : 0917520000070040003
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Journal of Speech Sciences
2000 Volume.7 No. 4 p.3 ~ p.10
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A Reliable Pitch Determination Algorithm (PDA) Based on Dyadic Wavelet Transform (DyWT)
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Kim, Namhoon
Kang, Yongsung/Ko, Hanseok
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Abstract
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This paper presents a time-based Pitch Determination Algorithm (PDA) for the reliable estimation of Pitch Period (PP) in speech signals. Based on the Dyadic Wavelet Transform (DyWT), the preposed PDA detects the presence of Glottal Closure Instants (GCI) and uses the information to determine the pitch period. We also examine the problem of conventional PDAs based on DyWT; their performance is compared with the proposition of this paper. The effectiveness of the proposed method is tested with real speech signals containing a transition between the voice and the unvoiced interval where the energy of the voiced signal is unsteady. The result shows that the proposed method provides good performance in estimating both the unsteady GCI positions as well as the steady parts.
Keyword : GCI, Pitch period, U/V detection, Dyadic wavelet transform
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KEYWORD
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