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.
Digital underwater acoustic voice communications
Digitale, akustische Unterwasser-Sprachkommunikation
IEEE Journal of Oceanic Engineering ; 21 , 2 ; 181-192
1996
12 Seiten, 27 Quellen
Article (Journal)
English
Digitalübertragung , Unterwasserschall , Unterwassernachrichtentechnik , Codierer-Decodierer , DSP (digitaler Signalprozessor) , Schallsender , Schallempfänger , Blockschaltbild , Übertrager , Pulsphasenmodulation , Sprachcodierung , Sprachsynthese , Entscheidungsfindung , Algorithmus , Schallsignal , Signalerkennung , Digitalmodulation , Pulsmodulation , Sprachkommunikation , digitaler Signalprozessor
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