定点分析：已知一个语音信号，数据采样频率为100Hz，试分别绘制N＝128点DFT的幅频图和N＝1024点DFT幅频图。
Fixed-point analysis: a voice signal is known, the data sampling frequency is 100Hz, try drawing N = 128 points, respectively, DFT amplitude-frequency diagram and N = 1024-point DFT amplitude-frequency diagram. (2009-12-23, Visual C++, 1KB, 下载17次)