goertzel算法解码DTMF信号程序-algorithm for decoding DTMF signals goertzel program

分别使用goertzel和fft对dtmf语音信号进行识别-using goertzel algorithm and fft to build a detector separately

清华大学信号处理课程实验，内容是Goertzel 算法，FFT算法实验以及对比-Tsinghua signal processing course experiment, the content is Goertzel algorithm, FFT algorithm and comparative experiments