This paper presents some improvements to the mixed Harmonic and Stochastic eXcitation (HSX) algorithm in the context of low bit rate speech coding (around 2.4 kbit/s). The dominant issue is the modeling of the excitation signal in order to improve the quality of the synthesized speech signal without increasing neither the bit rate nor the complexity. The pitch tracking algorithm is revised in order to increase the robustness and to reduce the complexity. The voicing analysis algorithm is also refined. Informal listening of the synthesized speech at 2.4 kbitls shows a significant improvement.
Cite as: Matmti, R., Jelinek, M., Adoul, J.-P. (1997) Low bit rate speech coding using an improved HSX model. Proc. 5th European Conference on Speech Communication and Technology (Eurospeech 1997), 1287-1290, doi: 10.21437/Eurospeech.1997-194
@inproceedings{matmti97_eurospeech,
author={Ridha Matmti and Milan Jelinek and Jean-Pierre Adoul},
title={{Low bit rate speech coding using an improved HSX model}},
year=1997,
booktitle={Proc. 5th European Conference on Speech Communication and Technology (Eurospeech 1997)},
pages={1287--1290},
doi={10.21437/Eurospeech.1997-194}
}