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Phase retrieval with Bregman divergences: Application to audio signal recovery (2011.12818v1)
Published 25 Nov 2020 in cs.SD and eess.AS
Abstract: Phase retrieval aims to recover a signal from magnitude or power spectra measurements. It is often addressed by considering a minimization problem involving a quadratic cost function. We propose a different formulation based on Bregman divergences, which encompass divergences that are appropriate for audio signal processing applications. We derive a fast gradient algorithm to solve this problem.