Automatic Detection of Domain Shifts in Speech Enhancement Systems Using Confidence-Based Metrics

Introducing a domain shift, such as a change in language or environment, to a well-trained speech enhancement system can cause severe performance degradation. Most current research assumes that a domain shift has already been detected and focuses on either supervised or unsupervised domain adaptation techniques. Here, we address the problem of automatically detecting when a domain shift has occurred. We present a domain shift detection method based on monitoring the confidence of a network that predicts the quality of enhanced speech. The experimental results show that our method can effectively detect a domain mismatch between the training and test sets.