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Digital underwater acoustic voice communications
Woodward, B.; Sari, H.;
Oceanic Engineering, IEEE Journal of
Volume 21,
Issue 2,
April 1996
Page(s):181
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192
Abstract:
This paper describes the design of an underwater acoustic diver communication system controlled by a digital signal processor. The speech signal transmission rate is compressed by using linear predictive coding (LPC) and the extracted parameters are transmitted through the water to a synchronized receiver by employing digital pulse position modulation (DPPM). The pulse position in each time frame is estimated by an energy detection and decision algorithm which enables the received LPC parameters to be recovered and used to synthesize the speech signal
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