改进Goertzel算法的DTMF信号检测的仿真与应用

Simulation and Application of DTMF Signal Detection Using Modified Goertzel Algorithm

采用Scilab仿真了DTMF信号的产生与Goertzel算法检测拨号的过程及随机噪声和话音信号对DTMF拨号检测的影响,并分析了产生误识别拨号的原因。给出了应用DSP技术的DTMF拨号检测的步骤、方法、改进措施和结果。

The Scilab is used to simulate the process of generating DTMF（Dual Tone Multi Frequency） signals and detecting the dialing signals by means of Goertzel algorithm as well as the effects of the random noise and speech signals on the detection of the DTMF dialing. In addition, the reason of the false detection is analyzed. Then the DSP application of DTMF dialing detection is provided with the steps, the methods, the improvements and the results.