FAST SPARSE SUBBAND DECOMPOSITION USING FIRSP (ThuPmPO1)

Author(s) : Mike Davies (QMUL, UK) Laurent Daudet (Laboratoire d'Acoustique Musicale, France)

Abstract : This paper presents a new fast algorithm for generating sparse signal approximations within an overcomplete subband representation. While the current paper concentrates on sparsifying the Modulated Complex Lapped Transform the theory is applicable to representations composed of a general union of orthonormal bases. We illustrate our method on an audio signal and demonstrate the coding gain of such representations.

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