Dalia El Badawy

Relative group sparsity for non-negative matrix factorization with application to on-the-fly audio source separation

We consider dictionary-based signal decompositions with group sparsity, a variant of structured sparsity. We point out that the group sparsity-inducing constraint alone may not be sufficient in some cases when we know that some bigger groups or so-called supergroups cannot vanish completely. To deal…