A new type of perfect-reconstruction QMF banks

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 ampli...

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Bibliographic Details
Main Authors: Sau-Gee Chen, Min-Chi Kao, Sy-Ping Chen
Format: Conference Proceeding
Language:English
Subjects:
Adaptive filters
Delay effects
Filter bank
Filtering
Lattices
Low pass filters
Nonlinear distortion
Phase distortion
Prototypes
Speech coding
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Description
Summary: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.
ISSN:1058-6393
2576-2303
DOI:10.1109/ACSSC.1996.599165