采用分级滤波的方法，这种方法降低了滤波器对级数的要求，减小硬件开销。

USES hierarchical filtering method, this method reduces the filter to request, decrease of the series hardware overhead.

youdao

采用分级滤波的方法，这种方法降低了滤波器对级数的要求，减小硬件开销。

USES hierarchical filtering method, this method reduces the filter to request, decrease of the series hardware overhead.

youdao