这是用三角窗设计的FIR低通滤波器，来消除音乐信号的噪声-This is the triangular window design FIR low-pass filter to eliminate the noise signal Music

使用IS-95 FIR滤波器从白噪声中滤得低通噪声,使用matlab2007b编写-Using the IS-95 FIR filter obtained from the white noise in the low-pass noise filter