Full duplex underwater acoustic digital voice communication demonstration device and method

A technology of digital speech and demonstration device, applied in speech analysis, electrical components, transmission systems, etc., can solve the problems of blank, can not be directly applied to science and technology museums, exhibitions, etc., to achieve high intelligibility, easy debugging and maintenance, Inexpensive effect

Active Publication Date: 2021-01-15
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although underwater acoustic communication technology has achieved rapid development, for example, the "Jiaolong" can transmit information such as voice, image, data, text and commands in the deep sea environment, the maximum communication distance is 8-10km, and the maximum transmission rate is 10 kbit / s (Zhu Min. Acoustic System of Jiaolong Manned Submersible, Acoustic Technology, 2013,32(6):1-4), however, in the Ocean Science and Technology Museum, exhibits related to underwater acoustic communication are almost blank
Existing underwater acoustic communicators cannot be directly applied to exhibitions in science and technology museums due to reasons such as volume, price, speed and interactivity

Method used

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  • Full duplex underwater acoustic digital voice communication demonstration device and method
  • Full duplex underwater acoustic digital voice communication demonstration device and method
  • Full duplex underwater acoustic digital voice communication demonstration device and method

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Embodiment 1

[0037] Embodiment 1: The device described in this embodiment is divided into communication parties A and B, and the distribution is denoted as U 1 and U 2 , U 1 and U 2 The status is exactly the same, and both can send and receive voice signals independently. The bandwidth of the underwater acoustic transducer is 20 ~ 30kHz, divided into B 1 and B 2 Two subbands, B 1 The frequency range of the sub-band is 20~25kHz, B 2 The frequency range of the sub-band is 25-30kHz. u 1 and U 2 The hardware and software structures are basically the same, the difference is that U 1 with B 1 Sub-band to send voice data, use B 2 The sub-band receives voice data; U 2 On the contrary, use B 2 Sub-band to send voice data, use B 1 The subbands receive voice data. Such as figure 1 As shown, U 1 and U 2 The hardware system mainly includes microphone, earphone, WT2000 vocoder, TMS320 C6748 DSP, preamp filter, A / D converter, D / A converter and underwater acoustic transducer. In additio...

Embodiment 2

[0042] Embodiment 2: The hardware structure of the second embodiment of the underwater acoustic digital voice communication demonstration device is basically the same as that of the first embodiment, except that the WT2000 vocoder is replaced by the WT600F vocoder. The WT600F vocoder is a low-rate vocoder chip, such as Figure 5 shown. WT600F vocoder has built-in voice codec software, no need for external memory, can realize voice compression and synthesis at the same time, synthesize and output higher-quality voice at a rate of 600bps. The WT600F vocoder provides a UART interface, through which the user can read and write voice coded data. The data format read and written by the WT600F vocoder is shown in Table 1. In Table 1, the 5th to 9th bytes and the high 5 in the 10th byte are speech coded data, and the remaining bytes are frame header, command symbol, length and CRC check, etc., so the valid speech coded data is 45 bits.

[0043] Table 1 WT600F vocoder frame structur...

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Abstract

The invention discloses a full duplex underwater acoustic digital voice communication demonstration device and method, and relates to underwater acoustic digital voice communication. The device comprises a communication party A and a communication party B which are marked as U1 and U2 and have the same hardware structure. The U1/U2 hardware system comprises a voice input and output device, a vocoder, a peripheral circuit of the vocoder, an embedded CPU, peripheral equipment of the embedded CPU, an amplifying and filtering circuit, a power conversion circuit, an acoustoelectric conversion device, a control panel and a tablet personal computer. The U1/U2 hardware system further comprises a MCU and related circuits thereof, an electric leakage protection circuit, a bubble generator, an acoustoelectric conversion device lifting device, an acoustic baffle, a water tank and an operation platform. The acoustic conversion device comprises four underwater acoustic transducers or two underwateracoustic transducers and two hydrophones. The bandwidth of the underwater acoustic transducer comprises a B1 sub-band and a B2 sub-band. A real-time full duplex underwater voice communication functionis realized. Received and synthesized voice is high in intelligibility, naturalness and sharpness, good in interaction, small in size, low in price, upgradable and easy to debug.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic digital voice communication, in particular to a full-duplex underwater acoustic digital voice communication demonstration device and a method thereof. Background technique [0002] With the gradual depletion of land resources, the development of oceans has become increasingly urgent. In recent years, the country has invested more and more in the fields of marine research, exploration and development, and the corresponding marine economy has also grown. More and more universities and research institutions at home and abroad have begun to engage in marine research, and have achieved a series of major scientific research achievements. For example, in 2012, the deep-water submersible "Jiaolong" independently developed by my country reached a maximum dive depth of 7062m in the Mariana Trench. , creating the deepest diving record of an operational manned submersible (Xu Fengnan, Zhang Haiyan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/02G10L19/20
CPCG10L19/20H04B13/02
Inventor 刘胜兴赵振华
Owner XIAMEN UNIV
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