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Conference Papers Year : 1997

Speech synthesis using phase vocoder techniques


A new light is thrown on the Portnoff [1] speech signal timescale modification algorithm. It is shown in particular that the Portnoff algorithm easily accommodates expansion factors bigger than 2 without causing reverberation nor chorusing. The modified Portnoff algorithm, which draws on spectral modification techniques due to Seneff [2], has been tested on several speech signals. The quality of the synthesized signal is totally satisfactory even for big expansion factors. The article gives a brief summary of the Portnoff algorithm and spells out the modifications introduced. It is shown that the phase unwrapping procedure constitutes a crucial point of the algorithm.
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hal-00835319 , version 1 (18-06-2013)


  • HAL Id : hal-00835319 , version 1


Joseph Di Martino. Speech synthesis using phase vocoder techniques. EUROSPEECH - Fifth European Conference on Speech Communication and Technology - 1997, Sep 1997, Rhodes, Greece. ⟨hal-00835319⟩
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