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Method for encrypting voice based on GSM voice channel transmission

A voice channel, voice technology

Inactive Publication Date: 2010-06-30
成都三零瑞通移动通信有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for transmitting encrypted voice based on the GSM voice channel, aiming to solve the problem that the traditional encrypted voice transmission technology needs to perform 3 times of vocoding and decoding on the voice data during the transmission process, so that the transmission rate cannot meet the high requirements. The problem of quality voice security communication requirements

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  • Method for encrypting voice based on GSM voice channel transmission
  • Method for encrypting voice based on GSM voice channel transmission
  • Method for encrypting voice based on GSM voice channel transmission

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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] figure 2 The flow of the method for transmitting voice based on the GSM voice channel provided by an embodiment of the present invention is shown.

[0021] At the GSM sending end, the A / D-converted voice data is encoded by a vocoder to obtain an encoded data stream, which is encrypted by a voice encryption module, and the encrypted data stream is then subjected to voice-like modulation. Compared with the traditional method, in the embodiment of the present invention, the voice-like modulation is not to directly modulate the encrypted voice signal into an audio signal, but to modulate it in...

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Abstract

The invention provides a method for encrypting voice based on the GSM voice channel transmission, which is applicable to the field of mobile communication. Through directly modulating encrypted voice data into voice-like coding signals conforming to the acoustic code coding format in the voice-like modulation process of the GSM sending end, the method can reduce once encoding and decoding of an acoustic code device. Even in the IP network, the signal transmission speed obtained by the method can meet the requirement of high quality voice secrecy communication.

Description

technical field [0001] The invention belongs to the field of mobile communication, in particular to a method for transmitting encrypted voice based on a GSM voice channel. Background technique [0002] From the point of view of transmitting user information, the GSM system provides three ways, namely voice mode (CSV), short message mode (SMS) and data mode (CSD or GPRS). There are two ways to realize confidential voice communication on the GSM network. One is to directly transmit the vocoded voice on the data channel through the data mode, and the other is to modulate the vocoded data stream into a voice-like signal through the voice mode, and then transmit it on the GSM network. upload. Existing GSM data channels include GPRS and CSD. The former belongs to low-speed packet domain transmission, and QOS cannot be guaranteed when used for voice data transmission, and the latter has gradually withdrawn from practical applications. As the basic application of the GSM network, ...

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Application Information

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IPC IPC(8): H04W12/02G10L19/00H04L27/20
Inventor 虞忠辉周治中谢辉左光磊
Owner 成都三零瑞通移动通信有限公司
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