Low rate equivalent speech water sound communication technique

Abstract

The invention relates to a low-rate equivalent voice underwater sound communication technique, which comprises the following steps: firstly, voices are converted to massages through voice recognition, then the massages are converted to abbreviated entry code strings through a converting entry stock and an information code converting and matching algorism, wherein each of the entry codes is corresponding to a multimedia voice record one by one of the entry code in a multimedia information database, the entry code strings are sent to an underwater sound channel through an underwater communication device, the sending and the receiving parts have the same converting entry code stock and the same multimedia information database, and the receiving end decodes the received entry code strings into corresponding letters and plays information thereof, such as voice and the like. The technique can obviously reduce requirements of the transmission rate of underwater sound messages and voice communication, the receiving end further can realize the clear real-time playing of information which comprises the massages, the voice and even images, and can obviously reduce the difficulty of the designing technique of the underwater sound communication system and further can improve the reliability and the communication secrecy of the system.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic communication, in particular to a low-rate equivalent voice underwater acoustic technology. Background technique [0002] The underwater acoustic channel is a complex time-varying, space-varying, and frequency-varying random multi-path transmission channel, which has severely limited bandwidth, large propagation loss, high environmental noise, serious multi-path effect, and narrow channel bandwidth. Low carrier frequency, large transmission delay expansion, severe signal fluctuations and fading, etc., make wired communication or voice communication technology that is easy to implement in the field of air radio communication, but it is very difficult to implement in the field of underwater acoustic communication. [0003] At present, domestic and foreign researchers' research on underwater acoustic voice communication mainly focuses on the audio signal after A / D sampling, then removes r...

AI Technical Summary

Problems solved by technology

[0005] The patent for invention with the application number 200410039406.7 discloses a communication method for implementing voice coding communication and common language classification coding on the telephone. Voice communication requirements for arbitrarily compiling communication information; the invention patent with application number 94100577.1 discloses a text input encoding and search index method using Chinese pinyin code mapping thesaurus, which realizes code input word internal code output, application number is 200610057552.1 The patent for invention disclosed a method of querying road conditions and other information from the called party by dialing input codes. The patent for invention with application number 200510001914.0 discloses a multilingual voice exchange device, which can convert Chinese voice input through a voice recognition system. Voice output in other languages, the invention patent with the application number 02114751.5 discloses a method for querying multimedia information of global tourist attractions by inputting uniformly compiled codes. The server returns the multimedia information of the corresponding attractions. The invention patent with application number 02127005.8 discloses a Chinese word segmentation method for Chinese text processing. The invention patent with application number 01123418.0 discloses a dynamic Chinese language based on a large-scale natural speech library. speech synthesis technology

[0006] Above-mentioned these technologies all have their respective advantages, but its deficiency is; 1, all fail to solve the information coding problem of large compression ratio effectively

2. None of them can solve the problem of low-rate voice communication, especially the equivalent voice communication suitable for underwater acoustic channels

3. None of them can solve the problem of equivalent simultaneous transmission of text and voice with short code strings

4. None of them can solve the problem that the two parties in the underwater acoustic communication use voice or text input, but the other party can listen to the text and its voice information

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