Title :
Improving frame-bound-ratio for frames generated by oversampled filter banks
Author :
Chai, Li ; Zhang, Jingxin ; Zhang, Cishen ; Mosca, Edoardo
Author_Institution :
Dept. of Autom. Control, Wuhan Sci. & Technol. Univ., Wuhan
fDate :
March 31 2008-April 4 2008
Abstract :
This paper presents a simple method to improve the frame-bounds-ratio of perfect reconstruction (PR) oversampled filter banks (FBs) by adjusting the gain of each subband filter. For a given analysis PRFB, a finite convex optimization algorithm is presented to redesign the subband gains such that the frame-bounds-ratio of the FB is minimized. The algorithm also provides an effective way to compute the frame bounds. Examples show the effectiveness of the presented method.
Keywords :
channel bank filters; optimisation; signal reconstruction; signal sampling; finite convex optimization algorithm; frame-bound-ratio; oversampled filter banks; perfect reconstruction; subband filter; Algorithm design and analysis; Approximation algorithms; Automatic generation control; Filter bank; Finite impulse response filter; Frequency; IIR filters; Signal analysis; Signal processing algorithms; Systems engineering and theory; Oversampled filter banks; convex optimization; frame bounds; linear matrix inequality;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1483-3
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2008.4518412
