M-band perfect-reconstruction linear-phase filter banks

Author

Xie, X.M. ; Chan, S.C. ; Yuk, T.I.

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ., China

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

583

Lastpage

586

Abstract

This paper studies the design of M-channel perfect-reconstruction (PR) linear-phase (LP) filter banks (FBs) with M=2^k using a tree-structured FB. It is based on a observation of Fliege(1995) that the length of the analysis filters is decreased by a factor of two when the depth of the tree is increased by one, while its transition bandwidth is increased by the same factor. A lattice-based 2-channel LP FB is chosen because the frequency responses of the lowpass and highpass analysis (synthesis) filters can be designed to be closely symmetric to the other around π/2. By properly selecting the filter length, transition bandwidth. and stopband attenuation of the 2-channel PR LP FBs at each level of the tree structure, it is possible to design uniform PR LP FB with excellent frequency characteristic and much lower system delay

Keywords

channel bank filters; digital filters; frequency response; lattice filters; linear phase filters; low-pass filters; network synthesis; signal reconstruction; M-band perfect-reconstruction filter banks; analysis filter length; analysis filters; filter banks design; frequency response; highpass filters; lattice-based 2-channel filter bank; linear-phase filter banks; lowpass filters; stopband attenuation; synthesis filters; system delay; transition bandwidth; tree depth; tree structure; tree-structured filter banks; Attenuation; Bandwidth; Channel bank filters; Delay systems; Filter bank; Frequency synthesizers; Image reconstruction; Signal processing; Signal synthesis; Tree data structures;

fLanguage

English

Publisher

ieee

Conference_Titel

Statistical Signal Processing, 2001. Proceedings of the 11th IEEE Signal Processing Workshop on

Print_ISBN

0-7803-7011-2

Type

conf

DOI

10.1109/SSP.2001.955354

Filename

955354