144 search results - page 2 / 29 » Sparsity in time-frequency representations |
ICA
2010
Springer
13 years 6 months ago
2010
Springer
Wiener filtering is one of the most widely used methods in audio source separation. It is often applied on time-frequency representations of signals, such as the short-time Fourier...
EJASP
2010
12 years 11 months ago
2010
We adopt the concept of channel diagonalization to time-frequency signal expansions obtained by DFT filter banks. As a generalization of the frequency domain channel representatio...
KDD
2012
ACM
11 years 7 months ago
2012
ACM
This paper introduces a novel image decomposition approach for an ensemble of correlated images, using low-rank and sparsity constraints. Each image is decomposed as a combination...
ICIP
2003
IEEE
14 years 6 months ago
2003
IEEE
Overcomplete transforms, like the Dual-Tree Complex Wavelet Transform, offer more flexible signal representations than critically-sampled transforms, due to their properties of sh...
ACL
2009
13 years 2 months ago
2009
Supervised sequence-labeling systems in natural language processing often suffer from data sparsity because they use word types as features in their prediction tasks. Consequently...