Oversampled filter banks: optimal noise shaping, design freedom, and noise analysis

Author

Bolcskei, Helmut ; Hlawatsch, Franz

Author_Institution

INTHFT, Vienna Univ. of Technol., Austria

Volume

3

fYear

1997

fDate

21-24 Apr 1997

Firstpage

2453

Abstract

We show that oversampled filter banks (FBs) offer more design freedom and less noise sensitivity than critically sampled FBs. We provide a parameterization of all synthesis FBs satisfying perfect reconstruction for a given oversampled analysis and we derive bounds and expressions for the variance of the reconstruction error due to noisy subband signals. Finally we introduce noise shaping in oversampled FBs and calculate the optimal noise shaping system

Keywords

band-pass filters; digital filters; error analysis; noise; signal reconstruction; signal sampling; signal synthesis; bounds; critically sampled filter banks; filter bank design; noise analysis; noise sensitivity; noisy subband signals; optimal noise shaping system; oversampled analysis; oversampled filter banks; perfect reconstruction; reconstruction error variance; synthesis filter banks; Analysis of variance; Channel bank filters; Filter bank; Frequency domain analysis; Iron; Noise reduction; Noise shaping; Signal analysis; Signal synthesis;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on

Conference_Location

Munich

ISSN

1520-6149

Print_ISBN

0-8186-7919-0

Type

conf

DOI

10.1109/ICASSP.1997.599570

Filename

599570