Title :
A new type of perfect-reconstruction QMF banks
Author :
Chen, Sau-Gee ; Kao, Min-Chi ; Chen, Sy-Ping
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A new type of perfect-reconstruction QMF system is proposed. The filter system is based on half-band filters so that it has lower complexity and group delay than the known QMF systems, with a comparable performance. It is shown that the new PR QMF system achieves zero phase distortion and zero amplitude distortion, in addition to producing alias-free outputs. A filter optimization technique is also proposed for its prototype low pass filter. For realization, its polyphase architecture is derived, which has a very simple structure.
Keywords :
band-pass filters; computational complexity; filtering theory; low-pass filters; optimisation; quadrature mirror filters; signal reconstruction; QMF banks; alias-free outputs; analysis filter; complexity; group delay; half-band filters; low pass filter; optimization technique; perfect reconstruction filter banks; polyphase architecture; synthesis filter; zero amplitude distortion; zero phase distortion; Adaptive filters; Delay effects; Filter bank; Filtering; Lattices; Low pass filters; Nonlinear distortion; Phase distortion; Prototypes; Speech coding;
Conference_Titel :
Signals, Systems and Computers, 1996. Conference Record of the Thirtieth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-8186-7646-9
DOI :
10.1109/ACSSC.1996.599165
