Research on an Embedded Ultra-Low-Bit-Rate Speech Coding Algorithm

Abstract:

Ultra-low-bit-rate speech coding algorithm was in great demand for many fields such as underwater speech communications. Underwater speech communication for middle-long distance has the characteristics of narrow bandwidth as well as low transmission rate, which makes the underwater speech communication much difficult. Ultra-low-bit-rate speech coding algorithm plays an important role on this occasion. More over, it will be more flexible for the underwater speech communication system if the speech coding algorithm has an embedded structure. The paper introduced the principle of an embedded speech coding algorithm with dual rates at both 300bps and 400bps based on the enhanced mixed excitation linear prediction model. The results show that this embedded ultra-low-bit-rate speech coding algorithm has satisfactory quality under both DRT and MOS test.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 1951-1954
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.1951
• Online since: July 2014
• Authors: Ye Li*, Yan Hong Fan, Fei Yuan, Xiao Mei Xu
• Keywords: Embedded Structure, Enhanced Mixed Excitation Linear Prediction, Speech Coding Algorithm, Ultra-Low-Bit-Rate

References

[1] Bryan Woodward, Hayri Sari. Digital underwater acoustic voice communications [J]. IEEE Journal of Oceanic Engineering. 1996: 21(2) : 181-192.

DOI: 10.1109/48.486793

[2] Hayri Sari, Bryan Woodward. Underwater voice communications using a modulated laser beam[J]. OCEANS'98. 1998(2)：1183-1188.

DOI: 10.1109/oceans.1998.724422

[3] GUO Z Y，Chen Y，JIA N，et al. Study and implementation of underwater digital voice communication system [J]. Acta Acustica. 2008：33(5): 409-418.

[4] SANG E F，YE S. Source coding robustness for underwater speech communication[J]. Journal Of Harbin Engineering University. 2002: 23(5): 20-23.

[5] Supplee L M，Cohn R P，Collura J S，et al. Melp. The new federal standard at 2400 bps[C]. IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP-1997. Munich, Germany: IEEE Press. 1997: (2): 1591-1594.

DOI: 10.1109/icassp.1997.596257

[6] Wang T, Koishida K, Cuperman V et al. A 1200/2400 bps coding suite based on MELP [C]. Speech Coding, 2002, IEEE Workshop Proceedings. (2002).

DOI: 10.1109/scw.2002.1215734

[7] NATO STANAG 4591 ANNEX M Ratification Draft 1. MELPe variation for 600 bit/s NATO narrow band voice coder[M]. The Hague: NATO, (2003).

DOI: 10.1109/icassp.2006.1660114

[8] LI Ye, FAN Y H, HAO Q Y, GUO Q. High quality speech Coder at 300bps[J]. Audio Engineering. 2010: 34(12): 51-53.