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arXiv · 2104.03538

MetricGAN+: An Improved Version of MetricGAN for Speech Enhancement

Szu-Wei Fu·Cheng Yu·Tsun-An Hsieh·Peter Plantinga·Mirco Ravanelli·Xugang Lu·Yu Tsao
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Abstract

The discrepancy between the cost function used for training a speech enhancement model and human auditory perception usually makes the quality of enhanced speech unsatisfactory. Objective evaluation metrics which consider human perception can hence serve as a bridge to reduce the gap. Our previously proposed MetricGAN was designed to optimize objective metrics by connecting the metric with a discriminator. Because only the scores of the target evaluation functions are needed during training, the metrics can even be non-differentiable. In this study, we propose a MetricGAN+ in which three training techniques incorporating domain-knowledge of speech processing are proposed. With these techniques, experimental results on the VoiceBank-DEMAND dataset show that MetricGAN+ can increase PESQ score by 0.3 compared to the previous MetricGAN and achieve state-of-the-art results (PESQ score = 3.15).

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Szu-Wei Fu, Cheng Yu, Tsun-An Hsieh, Peter Plantinga, Mirco Ravanelli, Xugang Lu, Yu Tsao. 2021-04-08. MetricGAN+: An Improved Version of MetricGAN for Speech Enhancement. https://arxiv.org/abs/2104.03538

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