Anti vocoder compressed end-to-end voice encryption device and method

A voice encryption and vocoder technology, which is applied in voice analysis, security devices, selection devices, etc., can solve the problems of voice encryption methods, such as the patent has not been queried, the delay is too large, and the phone card package cannot be used.

Inactive Publication Date: 2007-08-29
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

However, the data channel encrypted voice transmission has the following disadvantages: a) the problem of excessive delay caused by establishing a connection and using an automatic retransmission mechanism cannot be overcome; b) there is a problem of interoperability of the data channel between mobile networks in various regions; c ) The data channel method needs to open data services in the operator, and the existing phone card packages and other services cannot be used at both ends
A new speech encryption method for anti-vocoder compression of speech channels has not yet found any published patents

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  • Anti vocoder compressed end-to-end voice encryption device and method
  • Anti vocoder compressed end-to-end voice encryption device and method

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Embodiment Construction

[0045] In order to further illustrate the above-mentioned purpose, technical solution and effect of the present invention, the present invention will be described in detail below through examples in conjunction with the above-mentioned figures.

[0046]A one-way encryption process of the anti-vocoder compression end-to-end voice encryption device is composed of a sending end encryption module and a receiving end decryption module. They are respectively combined with the mobile phone at the sending end and the mobile phone at the receiving end to realize the encryption and decryption process of the one-way communication voice. Two-way voice encryption needs to add a decryption module on the mobile phone at the sending end of the secure call and an encryption module at the mobile phone at the receiving end. The encryption module at the sending end is composed of a low code rate compression module, an encryption module, an orthogonal multi-carrier modulation module, a carrier gen...

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Abstract

Being related to end-to-end safety comm area in global mobile comm system, concretely the invention is related to end-to-end speech sound encryption unit and method of anti vocoder compression realized on traditional voice channel of GSM mobile comm system. The encryption unit is composed of encryption module at sending end and decryption module at receiving end. The encryption module at sending end includes compression module in low code rate (CMLCR) 4, an encryption module, orthogonal multicarrier modulation module (OMMM) 6, first carrier wave generator module (CWGM), first key management negotiation module (KMNM) 8, and first sync module. Decryption module at receiving end includes OMMM 14, second CWGM, decryption module, CMLCR 17, KMNM 18, and second sync module. Through GSM speech sound channel, the invention carries out end-to-end speech sound encryption transmission. Advantages are low time delay, high security, and flexible and convenient.

Description

technical field [0001] The present invention relates to the field of end-to-end secure communication in the Global System of Mobile Communication (GSM, Global System of Mobile communication), in particular to an end-to-end voice compression-resistant vocoder implemented on the traditional voice channel of the GSM mobile communication system Encryption device and method. Background technique [0002] GSM is a cellular mobile communication standard based on time-division multiple access mode formulated by the International Telecommunication Union Standardization Organization. It can provide services such as voice, data, short message and wireless Internet access. It was first applied in Europe and my country and achieved great success. At present, China's GSM network has covered most of the cities and towns in the country, and has become an important means of communication for all walks of life in the national economy. [0003] With the rapid development of the GSM network, a...

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Application Information

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IPC IPC(8): H04Q7/32H04B1/38H04M1/68H04W12/02G10L19/14H04L27/26
Inventor 陈立全胡爱群徐青郭琦
Owner SOUTHEAST UNIV
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