Voice encryption method for GSM handset with anti longterm prediction rule pulse excitation compression coding

Abstract

The invention relates to one anti-long time prediction rules impulse excitation compression codes global cell phone language coding method, which comprises the following steps: connecting cell phone language coding and decoding modules for coding computation to realize decoding function between A / D module and decoding module, wherein, the said decoding and coding module is one digital signal minimum system hardware module and the DSP process module is to process language signals coding computation; the power module is connected to power interface of DSP process module.

Description

technical field [0001] The invention relates to an end-to-end voice encryption method for a Global Communications (GSM) mobile phone. It is based on the anti-long-term predictive regular pulse excitation (RPE-LTP) compression coding voice encryption and decryption algorithm, and uses the digital signal processing (DSP) chip TMS320C5402 as the basic platform. It is an end-to-end secure communication method for wireless network terminals. Background technique [0002] With the rapid development of mobile communication technology, especially the wide application of GSM system in the world, the security requirements of GSM mobile phone communication are increasing day by day, and users' requirements for mobile phone security communication are also getting higher and higher. Although there is a relatively complete set of mobile phone security communication specifications and technologies in the standard GSM system, because only wireless channel encryption technology is used, it c...

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Problems solved by technology

However, this type of technology also has obvious defects: First, the delay problem caused by establishing an IP connection and using an automatic retransmission mechanism cannot be overcome. Among them, the connection delay can reach 20-30 seconds, and the processing delay is 0.5- 1 second, so it seriously affects the call effect

Second, this type of technology is based on GSM data channels, so there are interoperability problems when passing through different operators and international networks, and cross-network cannot be interconnected

Third, it does not support the existing GSM value-added services, such as existing phone cards and some other value-added services of the mobile network cannot be used at both ends of the data channel

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