DNN-based phase estimation for online speech enhancement

This paper presents a DNN-based phase reconstruction algorithm for online speech enhancement. Although various online phase reconstruction algorithms have been proposed, many of them rely on the structure of the clean amplitude. This restricts their performance in speech enhancement applications, where only noisy observations are available. In contrast, our proposed method directly estimates the clean phase from the noisy observation. Several aspects of phase reconstruction and their effects on speech enhancement are also investigated and discussed. Experimental results confirm that our method performs better than conventional online phase reconstruction methods for speech enhancement in all experimental settings.