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arxiv 2505.23515 v1 pith:33KZTKGK submitted 2025-05-29 eess.AS cs.LGeess.SP

DeepFilterGAN: A Full-band Real-time Speech Enhancement System with GAN-based Stochastic Regeneration

classification eess.AS cs.LGeess.SP
keywords systemreal-timespeechenhancementmodelspredictiveregenerationstochastic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this work, we propose a full-band real-time speech enhancement system with GAN-based stochastic regeneration. Predictive models focus on estimating the mean of the target distribution, whereas generative models aim to learn the full distribution. This behavior of predictive models may lead to over-suppression, i.e. the removal of speech content. In the literature, it was shown that combining a predictive model with a generative one within the stochastic regeneration framework can reduce the distortion in the output. We use this framework to obtain a real-time speech enhancement system. With 3.58M parameters and a low latency, our system is designed for real-time streaming with a lightweight architecture. Experiments show that our system improves over the first stage in terms of NISQA-MOS metric. Finally, through an ablation study, we show the importance of noisy conditioning in our system. We participated in 2025 Urgent Challenge with our model and later made further improvements.

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  1. A Comparison of Generative and Discriminative Methods for Speech Enhancement: Robustness, Complexity, and Hallucination

    eess.AS 2026-06 unverdicted novelty 3.0

    Comparative analysis of generative versus discriminative speech enhancement models shows differences in robustness to noise, model complexity, convergence, and hallucination measured via word error rate and phoneme si...