对称滤波器 meaning in English

balanced filter
balancedfilter
symmetrical filter

In addition , according to the characteristics of wavelet packet transform and that of conjugate quadrature filter bank , we bring forward the ameliorated arithmetic of wavelet packet . the amplitude of time - varying harmonics can be measured accurately through the ameliorated arithmetic
另外我们结合小波包分解和正交镜像对称滤波器的特点，提出了小波包的改进算法，利用该算法可对时变谐波信号的幅值进行比较精确的分析。