DocumentCode
699256
Title
Fast sparse subband decomposition using FIRSP
Author
Davies, Mike ; Daudet, Laurent
Author_Institution
DSP & Multimedia Group, Queen Mary, Univ. of London, London, UK
fYear
2004
fDate
6-10 Sept. 2004
Firstpage
1665
Lastpage
1668
Abstract
This paper presents a new fast algorithm for generating sparse signal approximations within an overcomplete subband representation. While the current paper concentrates on sparsifying the Modulated Complex Lapped Transform the theory is applicable to representations composed of a general union of orthonormal bases. We illustrate our method on an audio signal and demonstrate the coding gain of such representations.
Keywords
iterative methods; matrix decomposition; signal representation; sparse matrices; wavelet transforms; FIRSP; audio signal; fast iteratively reweighted sparsifier; fast sparse subband decomposition; modulated complex lapped transform; overcomplete subband representation; sparse signal representation; Abstracts; Approximation methods; Equations; Quantization (signal); Silicon compounds; Single photon emission computed tomography;
fLanguage
English
Publisher
ieee
Conference_Titel
Signal Processing Conference, 2004 12th European
Conference_Location
Vienna
Print_ISBN
978-320-0001-65-7
Type
conf
Filename
7079786
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