Implementation and Design of Underwater Duplex Speech Communication System Based on Vector Hydrophone

Hua Chao Cui; An Bang Zhao; Bin Zhou; Kun Ping Sun; Yan Cui

doi:10.4028/www.scientific.net/AMM.336-338.1939

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 336-338Implementation and Design of Underwater Duplex...

Implementation and Design of Underwater Duplex Speech Communication System Based on Vector Hydrophone

Abstract:

This paper realizes 1.2kbps Mixed Excitation Linear Prediction (MELP) speech compression algorithm through multi-frame joint and Vector Quantization technology. In order to adapt to underwater acoustic channel, we apply the Orthogonal Frequency Division Modulation (OFDM) to modulate the source bits, together with synchronization, channel estimation and RS error correcting code technology. The hardware platform of this system relies on TMS320DM642 and AIC23. Moreover, we introduce single vector hydrophone to restrain the local source. The system finished duplex speech signal acquisition and transmission and tank test results prove that the synthesized speech is clear and understandable and it has a stable performance.

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Periodical:

Applied Mechanics and Materials (Volumes 336-338)

Pages:

1939-1944

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.336-338.1939

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Online since:

July 2013

Authors:

Hua Chao Cui, An Bang Zhao, Bin Zhou, Kun Ping Sun, Yan Cui

Keywords:

DM642, MELP, Orthogonal Frequency Division Multiplexing (OFDM), Speech Communication, Vector Hydrophone

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References

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