21 search results - page 1 / 5 » Sparse decompositions in "incoherent" dictionaries |
ICASSP
2009
IEEE
13 years 11 months ago
2009
IEEE
Sparse Decomposition (SD) of a signal on an overcomplete dictionary has recently attracted a lot of interest in signal processing and statistics, because of its potential applicat...
ICIP
2003
IEEE
14 years 6 months ago
2003
IEEE
The purpose of this paper is to generalize a result by Donoho, Huo, Elad and Bruckstein on sparse representations of signals/images in a union of two orthonormal bases. We conside...
ICASSP
2010
IEEE
13 years 5 months ago
2010
IEEE
This paper addresses an innovative approach to informed enhancement of damaged sound. It uses sparse approximations with a learned dictionary of atoms modeling the main components...
IJON
2002
13 years 4 months ago
2002
It was discovered recently that sparse decomposition by signal dictionaries results in dramatic improvement of the qualities of blind source separation. We exploit sparse decompos...
ICA
2007
Springer
13 years 11 months ago
2007
Springer
In underdetermined blind source separation problems, it is common practice to exploit the underlying sparsity of the sources for demixing. In this work, we propose two sparse decom...