中文说明： 掌握 IIR 数字滤波器的直接I 型、II 型、级联型、并联型结构的特点和表示方法；FIR数字滤波器的直接型、级联型、频率抽样型以及快速卷积的结构特点和表示方法；线性相位，FIR 滤波器的结构和特点；全通滤波器、梳状滤波器的特点和表示方法。
English Description：
Master of IIR digital filter of the direct type I, type II, cascade, parallel structure characteristics and representation; FIR digital filter of the direct type, cascade type, frequency sampling and fast convolution structure characteristics and representation method; linear phase, structure and characteristics of the FIR filter; allpass filter and comb filter characteristics and representation method.