Abstract
In the analysis-synthesis coding of speech signals, realization of the high quality in the low bit rate coding depends on the extraction of its characteristic parameters in the pre-processing. The precise extraction of the fundamental frequency, one of the parameters of the source information, guarantees the quality in the speech synthesis. But its extraction is difficult because of the influence of the consonant, non-periodicity of vocal cords vibration, wide range of the fundamental frequency, etc..In this paper, we will propose a new fundamental frequency extraction with the criterion based on its harmonics structure and low bit rate speech coding system using the Wavelet transform.
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