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arXiv · 2512.10382

Investigating training objective for flow matching-based speech enhancement

Liusha Yang·Ziru Ge·Gui Zhang·Junan Zhang·Zhizheng Wu
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Abstract

Speech enhancement(SE) aims to recover clean speech from noisy recordings. Although generative approaches such as score matching and Schrodinger bridge have shown strong effectiveness, they are often computationally expensive. Flow matching offers a more efficient alternative by directly learning a velocity field that maps noise to data. In this work, we present a systematic study of flow matching for SE under three training objectives: velocity prediction, $x_1$ prediction, and preconditioned $x_1$ prediction. We analyze their impact on training dynamics and overall performance. Moreover, by introducing perceptual(PESQ) and signal-based(SI-SDR) objectives, we further enhance convergence efficiency and speech quality, yielding substantial improvements across evaluation metrics.

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Liusha Yang, Ziru Ge, Gui Zhang, Junan Zhang, Zhizheng Wu. 2025-12-11. Investigating training objective for flow matching-based speech enhancement. https://arxiv.org/abs/2512.10382

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