本文研究的方法是通过VC编程实现用声卡对信号的调制解调。
The research method is using VC programming to realize the modulation and demodulation of the signal by audio-card.
在MATLAB环境中可以通过多种编程方法驱动声卡，实现对语音信号的采集和回放。
In the MATLAB environment through various programming method can realize sound card, driver to speech signal acquisition and playback.
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