3．　　用VC编程浮点程序实现对语音信号的按帧滤波。

1）　　在主程序中读取FIR DF系数文件。

2）　　在主程序中按帧读取语音样点文件，每帧180点。

3）　　设计浮点滤波子程序，供主程序调用。

4）　　保存滤波结果数据到文件中。

5）　　用cooledit试听滤波后的语音信号。

-3. VC programming with floating-point program to realize the speech signal by frame filtering. 1) In the main program file to read FIR DF coefficient. 2) The main program reads the voice samples according to the frame files, 180 points per frame. 3) floating-point filter design routines for the main program calls. 4) save the filtered data to the file. 5) Listen with cooledit voice signal after filtering.