Self-Supervised Learning-Based Source Separation for Meeting Data

Yuang Li; Xianrui Zheng; Philip C. Woodland

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arXiv · 2304.00871

Self-Supervised Learning-Based Source Separation for Meeting Data

Yuang Li·Xianrui Zheng·Philip C. Woodland

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Abstract

Source separation can improve automatic speech recognition (ASR) under multi-party meeting scenarios by extracting single-speaker signals from overlapped speech. Despite the success of self-supervised learning models in single-channel source separation, most studies have focused on simulated setups. In this paper, seven SSL models were compared on both simulated and real-world corpora. Then, we propose to integrate the best-performing model WavLM into an automatic transcription system through a novel iterative source selection method. To improve real-world performance, time-domain unsupervised mixture invariant training was adapted to the time-frequency domain. Experiments showed that in the transcription system when source separation was inserted before an ASR model fine-tuned on separated speech, absolute reductions of 1.9% and 1.5% in concatenated minimum-permutation word error rate for an unknown number of speakers (cpWER-us) were observed on the AMI dev and test sets.

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BibTeX RIS

Yuang Li, Xianrui Zheng, Philip C. Woodland. 2023-04-03. Self-Supervised Learning-Based Source Separation for Meeting Data. https://arxiv.org/abs/2304.00871

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