Title: Multi-functional digital encrypting telephone
Application Number: 200610041168 Application Date: 2006.08.09
Publication Number: 1909574 Publication Date: 2007.02.07
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H04M1/68;H04K1/02
Applicant(s) Name: Nanjing University of Aeronautics Address:
Inventor(s) Name: Yuan Jiabin;Gao Yuan
Attorney & Agent: shen genshui
Abstract:
    The invention relates to a multifunctional digit encrypt telephone, which comprises a filter circuit, the first A/D-D/A converter, a coder/decoder, the second A/D-D/A converter, one power amplifier, a liquid crystal display module, DSP, a control panel, and a modulator/demodulator. The invention has the advantages that: a, it uses data encrypt technique to increase the security of telephone communication; b, it processes the sonic data of AMBE coder with one stat data compressor, to minimize the entropy abundance of sonic data, to reduce the code rate in sonic communication; c, it has special key identification system; d, it uses digit modulation and digit transmission techniques, to realize network access function of telephone, and the user can use network device to communicate with microphones via dialing number.
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