근사 복원 IIR/FIR QMF 필터뱅크에서 지연요소 변화에 따른 특성에 관한 연구

A Study on the Characteristics of Delay Parameter Change in Approximately Reconstruction IIR/FIR QMF Filter Banks

This paper shows a novel and simple IIR/FIR QMF(quadrature mirror filter) filter banks, mixed IIR and FIR structure. Here, FIR filters used for phase compensation. In this paper, we introduced analysis and synthesis filter banks, which used FIR linear phase filters and all pass filters. In result, phase response of analysis and synthesis filter banks become approximately linear characteristic. Simultaneously, a liasing distortion can be completely canceled.