参考: The Scientist and Engineer’s Guide to Digital Signal Processing Multimedia Signal Processing: Theory and Applications in Speech, Music and Communications Classification 欲知细节,先识大体,看看数字滤波器都有哪些种类吧
参考: 双二阶滤波器 本文中的例子和代码放在Github First,什么是双二阶滤波器?wiki上是这么说的:二阶、递归、线性,含有两个极点和两个零点,“双二阶”的名字来源于它的传递函数是两个二次多项式的比值。 In signal processing, a digital biquad filter is a second order recursive linear filter,