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On the Asymptotic Mean Square Error Optimality of Diffusion Probabilistic Models
March 6, 2024, 5:42 a.m. | Benedikt Fesl, Benedikt B\"ock, Florian Strasser, Michael Baur, Michael Joham, Wolfgang Utschick
cs.LG updates on arXiv.org arxiv.org
Abstract: Diffusion probabilistic models (DPMs) have recently shown great potential for denoising tasks. Despite their practical utility, there is a notable gap in their theoretical understanding. This paper contributes novel theoretical insights by rigorously proving the asymptotic convergence of a specific DPM denoising strategy to the mean square error (MSE)-optimal conditional mean estimator (CME) over a large number of diffusion steps. The studied DPM-based denoiser shares the training procedure of DPMs but distinguishes itself by forwarding …
abstract arxiv convergence cs.lg denoising diffusion error gap insights mean novel paper practical square stat.ml strategy tasks type understanding utility
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