Papers › Investigating Training Objectives for Generative Speech Enhancement

Investigating Training Objectives for Generative Speech Enhancement

16 Sep 2024arXiv:2409.10753archive 2025-07-28

Julius Richter, Danilo de Oliveira, Timo Gerkmann

Generative speech enhancement has recently shown promising advancements in improving speech quality in noisy environments. Multiple diffusion-based frameworks exist, each employing distinct training objectives and learning techniques. This paper aims to explain the differences between these frameworks by focusing our investigation on score-based generative models and the Schr\"odinger bridge. We conduct a series of comprehensive experiments to compare their performance and highlight differing training behaviors. Furthermore, we propose a novel perceptual loss function tailored for the Schr\"odinger bridge framework, demonstrating enhanced performance and improved perceptual quality of the enhanced speech signals. All experimental code and pre-trained models are publicly available to facilitate further research and development in this domain.

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