11 citations · 19 across the 4 of their papers we have counts for
4 papers
Weighted Thresholding and Nonlinear Approximation
Emil Solsbæk Ottosen, Morten Nielsen
We present a new method for performing nonlinear approximation with redundant dictionaries. The method constructs an term approximation of the signal by thresholding with respe…
Nonlinear approximation with nonstationary Gabor frames
Emil Solsbæk Ottosen, Morten Nielsen
We consider sparseness properties of adaptive time-frequency representations obtained using nonstationary Gabor frames (NSGFs). NSGFs generalize classical Gabor frames by allowing…
A Phase Vocoder based on Nonstationary Gabor Frames
Emil Solsbæk Ottosen, Monika Dörfler
We propose a new algorithm for time stretching music signals based on the theory of nonstationary Gabor frames (NSGFs). The algorithm extends the techniques of the classical phase…
A Characterization of Sparse Nonstationary Gabor Expansions
Emil Solsbæk Ottosen, Morten Nielsen
We investigate the problem of constructing sparse time-frequency representations with flexible frequency resolution, studying the theory of nonstationary Gabor frames in the framew…