EUROSPEECH '95 Fourth European Conference on Speech Communication and Technology Madrid, Spain September 18-21, 1995

A Multipulse-Deconvolution Codec for Wideband Speech

V. Abreu-Sernandez, D. Docampo-Amoedo

Dept. de Tecnologias de las Comunicaciones, ETSI Telecommunication, Universidad de Vigo, Vigo, Spain

The wideband speech coder proposed in this paper is based on a MultiPulse scheme developed in our Department [1] in 1992. The first wideband MP version is a full-band scheme which makes forward linear prediction analysis every frame of 16 ms. The adaptive codebook search and the spiky deconvolution algorithm are carried out every 2 ms. Five different bit rates can be assigned from 16 kbps to 33 kbps. Employing the objective segmental SNR measure, the obtained quality is lower than the quality of the standard G.722 at 64 kbps. However, the subjective quality evaluated using MOS tests and Paired Comparison tests is comparable to the standard. We also evaluate a two-bands structure in which each subband is coded with a MP-Deconvolution scheme.

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Bibliographic reference.  Abreu-Sernandez, V. / Docampo-Amoedo, D. (1995): "A multipulse-deconvolution codec for wideband speech", In EUROSPEECH-1995, 49-52.