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Remote underwater acoustic voice communication system and communication method thereof

A voice communication, long-distance technology, applied in voice analysis, transmission systems, electrical components, etc., can solve problems such as inability to establish effective connections, achieve a narrow effective listening range, reduce the total amount of code streams, and improve the effect of the problem

Inactive Publication Date: 2011-11-23
SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
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  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to overcome the problem that the existing underwater acoustic communication system often fails to establish an effective connection during long-distance communication, the present invention provides a reliable long-distance underwater acoustic voice communication system, and also provides a communication method

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  • Remote underwater acoustic voice communication system and communication method thereof
  • Remote underwater acoustic voice communication system and communication method thereof
  • Remote underwater acoustic voice communication system and communication method thereof

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Embodiment Construction

[0027] The focus of the present invention lies in the segmentation of the voice signal, that is to say, it is divided into a silent segment and a voice segment, and only the voice segment is coded and transmitted.

[0028] The hardware architecture that the present invention relies on is the now known long-distance underwater acoustic digital voice communication terminal, see Figure 5 , its basic structure is that its terminal contains a high-speed digital signal processor, as attached Figure 5 The TMS320Vc5509A of TI Company shown in the figure, the dotted box in the figure is the processor, the processor is connected to the underwater acoustic transducer to establish an underwater acoustic channel with other long-distance underwater acoustic digital voice communication terminals, and the processor is also connected to the An audio acquisition device and an A / D sampling circuit are provided to obtain digital audio signals, and an audio output device and a D / A conversion cir...

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Abstract

The invention discloses a remote underwater acoustic voice communication system and a communication method thereof. According to the invention, through a scheme that distinguishing an audio signal as a mute segment and a voice segment, and carrying out coding transmission only on the voice segment, code stream amount is reduced, channel occupancy rate is low, transmission reliability of the underwater acoustic channel which is a narrowband transmission channel is enhanced to establish effective connection. In addition, since the bandwidth is narrow, effective interception range is narrow, and effective interception prevention in a communication process is improved.

Description

technical field [0001] The invention relates to a long-distance underwater acoustic voice communication system and a communication method. Background technique [0002] Different from the air wireless communication system, the underwater acoustic channel is a complex time-space-frequency multipath channel, the channel condition is very bad, and the Doppler effect and multipath delay effect of the underwater acoustic channel are much greater than that of the general terrestrial wireless communication system. Communication channel, so underwater real-time underwater acoustic communication is one of the hot and difficult topics of current research. It is extremely difficult to transmit real-time voice streams at a high rate in an underwater acoustic channel, especially in long-distance transmissions. Compared with wired communications, the rate of underwater communication is very low, because underwater communication uses sound waves instead of radio waves . In recent years, ...

Claims

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Application Information

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IPC IPC(8): H04B13/02G10L19/00G10L19/008
Inventor 李晔姜竞赛樊燕红郝秋贇马晓凤
Owner SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN