  Speech enhancement aims to improve the quality of speech signals in terms of
quality and intelligibility, and speech editing refers to the process of
editing the speech according to specific user needs. In this paper, we propose
a Unified Speech Enhancement and Editing (uSee) model with conditional
diffusion models to handle various tasks at the same time in a generative
manner. Specifically, by providing multiple types of conditions including
self-supervised learning embeddings and proper text prompts to the score-based
diffusion model, we can enable controllable generation of the unified speech
enhancement and editing model to perform corresponding actions on the source
speech. Our experiments show that our proposed uSee model can achieve superior
performance in both speech denoising and dereverberation compared to other
related generative speech enhancement models, and can perform speech editing
given desired environmental sound text description, signal-to-noise ratios
(SNR), and room impulse responses (RIR). Demos of the generated speech are
available at https://muqiaoy.github.io/usee.
