Implementation of MELP vocoder using lifting wavelet transform
N. Aoki, Tohru Ifukube, Kunio Takaya · 2003
This paper describes an implementation of MELP (mixed excitation linear prediction) vocoder. Subband division required for implementing the MELP vocoder was performed by the lifting wavelet transform. A new method to generate an appropriate glottal waveform was devised. In addition, three kinds of fluctuations observed in the steady parts of voiced speech were incorporated to enhance the naturalness of synthesized speech.