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Conference Papers Year : 2006

A CELP-Wavelet scalable wideband speech coder

Mickaël de Meuleneire
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Dominique Pastor


This paper presents a scalable wideband speech codec working at bitrates ranging from 8 to 32 kbit/s. The core layer is the ITU-T G. 729 at 8 kbit/s. A first enhancement layer is a bandwidth extension algorithm requiring 2 kbit/s to widen the G. 729 narrow band output speech. The difference between the wideband original and reconstructed signal is transformed in the time-frequency domain by a full wavelet decomposition. The resulting coefficients are quantized by an embedded quantizer at 22 kbit/s. Listening tests show the relevance of such a scheme when compared to a pure wavelet packet decomposition. In addition, listening tests suggest that the proposed codec is equivalent to the ITU-T G. 722 at 48 kbit/s for speech signals.


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hal-02136891 , version 1 (22-05-2019)



Mickaël de Meuleneire, Hervé Taddei, Olivier de Zelicourt, Dominique Pastor. A CELP-Wavelet scalable wideband speech coder. ICASSP'06 : IEEE International Conference on Acoustics, Speech and Signal Processing, May 2006, Toulouse, France. pp.1-1 -, ⟨10.1109/ICASSP.2006.1660116⟩. ⟨hal-02136891⟩
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