Abstract:

　　　The characteristic of wireless transmission for mine is that it has big loss during transmission, short transmission distance, narrow transmission channel, big noise, limited transmission ability and low SNR(Signal Noise Ratio) of speech signal. Through analysis of the mine speech signal and noise signal, and based on the speech compression, this paper proposes a model for mine wireless voice signal compression. Using the real time communication system dynamic simulation software-Systemview to simulate the model of compression scheme and verify the feasibility of compression scheme. Test results show that: compression scheme can meet the design requirements when the speech signal frequency is in the range of 800-3000Hz and the sampling frequency is 4 to 6 times as the maximum frequency of speech signal.

Key words: mine wireless communication, speech signal, speech compression scheme, Systemview