Blind Audio Bandwidth Extension: A Diffusion-Based Zero-Shot Approach. (arXiv:2306.01433v2 [eess.AS] UPDATED)

Audio bandwidth extension involves the realistic reconstruction of
high-frequency spectra from bandlimited observations. In cases where the
lowpass degradation is unknown, such as in restoring historical audio
recordings, this becomes a blind problem. This paper introduces a novel method
called BABE (Blind Audio Bandwidth Extension) that addresses the blind problem
in a zero-shot setting, leveraging the generative priors of a pre-trained
unconditional diffusion model. During the inference process, BABE utilizes a
generalized version of diffusion posterior sampling, where the degradation …

arxiv audio audio recordings bandwidth blind cases diffusion eess.as extension novel paper zero-shot