低时延两通道PR FIR滤波器组的设计

Design of Two-Band PR FIR Filter Banks with Low Delay

在两通道提升结构滤波器组的基础上 ,提出了一种新的低时延两通道完全重建 (PR) FIR滤波器组的设计方法 .该方法将两个非线性相位函数作为提升函数 ,并定义误差函数为提升函数理想频率响应与实际频率响应之差 .逼近过程采用了实虚部相联合的

Based on the lifting scheme, a new design algorithm is proposed for two band PR FIR filter banks with low delay. In this new method, the lifting functions are selected as non linear phase functions and the error is defined as the difference between the ideal frequency response and the actual response of the liting functions. During the design of lifting functions, the jointed approximation between real part and imaginary part is exploited.