This paper presents an Enhanced analysis-by-synthesis (AbS) Waveform Interpolative (EWI) speech coder at 4 kbps. The system incorporates novel features such as: AbS quantization of the slowly evolving waveform (SEW), AbS vector quantization (VQ) of the dispersion phase, a special pitch search for transitions, and switched-predictive analysis-by-synthesis gain VQ. Subjective quality tests indicate that it exceeds MPEG-4 at 4 kbps and of G.723.1 at 5.3 kbps, and it is slightly better than G.723.1 at 6.3 kbps.
Cite as: Gottesman, O., Gersho, A. (1999) Enhanced analysis-by-synthesis waveform interpolative coding at 4 KBPS. Proc. 6th European Conference on Speech Communication and Technology (Eurospeech 1999), 1443-1446, doi: 10.21437/Eurospeech.1999-327
@inproceedings{gottesman99_eurospeech,
author={Oded Gottesman and Allen Gersho},
title={{Enhanced analysis-by-synthesis waveform interpolative coding at 4 KBPS}},
year=1999,
booktitle={Proc. 6th European Conference on Speech Communication and Technology (Eurospeech 1999)},
pages={1443--1446},
doi={10.21437/Eurospeech.1999-327}
}