毕业设计&课设-DTMF代表双音多频，是一种通过电话线使用语音频带的电信信号系统。.zip

# Dual-Tone-Multi-Frequency-DTMF-Decoder ## Overview * DTMF stands for Dual Tone Multiple Frequency, it's a telecommunication signaling system using voice-frequency band over telephone lines. * It is also known as Touch-Tone. * Every button in the keyboard, when pressed will generate a superimposed sine wave of multiple frequencies. * Each number will possess different tone basedon the frequency it generates. * This Touch-Tone service for telephone keyboard has gradually replaced the use of Rotary dial and has become the industry standard for Landline and Mobile devices. * Originally DTMF was decoded using filter banks but now Digital Signal Processing is the predominant technology. * We have implemented ## Implementation * We’ve implemented DTMF using software as well as hardware. * Moroever, we’ve implemented basic filters to simulate and analyze logic of how DTMF works. * Software part is implemented in MATLAB using ‘The Goertzel Algorithm’ and hardware is onbreadboard using resistors and capacitors. * For more information refer to [Report.pdf](Report.pdf).