The All phase Digital filter (APDF) is a new type of linear phase filter.

全相位数字滤波器(APDF)是一种新型的线性相位滤波器。

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Secondly, to find the suited application, the characteristics of APDF based on IDCT/DCT are discussed. Zero-phase and sub-band filtering with complementary are two characters of APDF.

在全相位滤波器设计理论的基础上，本文证明了基于IDCT/DCT域的APDF有零相位特性和子带互补特性。

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