Title :
Fast sparse subband decomposition using FIRSP
Author :
Davies, Mike ; Daudet, Laurent
Author_Institution :
DSP & Multimedia Group, Queen Mary, Univ. of London, London, UK
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;
Conference_Titel :
Signal Processing Conference, 2004 12th European
Conference_Location :
Vienna
Print_ISBN :
978-320-0001-65-7
