Title :
Oversampled filter banks: optimal noise shaping, design freedom, and noise analysis
Author :
Bolcskei, Helmut ; Hlawatsch, Franz
Author_Institution :
INTHFT, Vienna Univ. of Technol., Austria
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;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.599570
