Title :
Implementation of MELP vocoder using lifting wavelet transform
Author :
Aoki, Naofumi ; Ifukube, Tohru ; Takaya, Kunio
Author_Institution :
Res. Inst. for Electron. Sci., Hokkaido Univ., Sapporo, Japan
Abstract :
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
Keywords :
linear predictive coding; speech coding; speech intelligibility; speech synthesis; transform coding; vocoders; wavelet transforms; MELP vocoder; glottal waveform generation; lifting wavelet transform; mixed excitation linear prediction; subband division; synthesized speech; voice quality; voiced speech; Acoustic pulses; Degradation; Filtering; Frequency; Linear predictive coding; Signal synthesis; Speech enhancement; Speech synthesis; Vocoders; Wavelet transforms;
Conference_Titel :
TENCON 99. Proceedings of the IEEE Region 10 Conference
Conference_Location :
Cheju Island
Print_ISBN :
0-7803-5739-6
DOI :
10.1109/TENCON.1999.818383
