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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 (Dual Tone Multi-Frequency) signals are dial signals in audio telephones. The integration of DTMF signal detection into a system containing a digital signal processor (DSP) is a valuable practical issue This article presents an implementation of TI ’s floating - point DSP chip C6 711, which successfully makes DTMF signal detection accurate, fast and easy with 20 Gyrosignal filters in parallel.