摘要
双音多频 DTMF(Dual Tone Multi- Frequency)信号是音频电话中的拔号信号 ,将 DTMF信号的检测集成到含有数字信号处理器 (DSP)的系统中 ,是一项较有价值的实际课题 .本文给出在 TI公司浮点 DSP芯片 C6 711中的实现方案 ,通过 2 0个并行的哥兹柔信号滤波器成成功地使双音多频信号检测变得准确、迅速和简单 .
DTMF(the Dual Tone Multi-Frequency) is the dialing signal most used in the new generation of telephone.It is a worthy engineering application to gather DTMF detection to the Digital Signal Processor system.This report looks at the use of a Texas Instrumentsw C6711 floating poing DSP to implement Gorertzel algorithms and DTMF detection.DTMF detection is performed using 20 parallel Goertzel filters,which makes the detecting accurately,quickly and simplely.
出处
《数学理论与应用》
2004年第4期29-31,共3页
Mathematical Theory and Applications
