Audio signals such as music are known to exhibit distinct and sparse time-frequency
patterns. In particular, the short-time Fourier/Gabor transform is widely used for sparsely …

We introduce a new penalty function that promotes signals composed of a small number of
active groups, where within each group, only a few high magnitude coefficients are nonzero …

Natural audio signals are known to be highly structured. Incorporating knowledge about this
inherent structure helps to improve audio restoration algorithms. In this article audio …

Due to the strong background noise and the acquisition system noise, the useful
characteristics are often difficult to be detected. To solve this problem, sparse coding …

This paper considers the denoising problem from the viewpoint of sparse atomic
representation. A general framework of time-frequency soft-thresholding is proposed which …