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Fusing Wav2vec2.0 and BERT into End-to-end Model for Low-resource Speech Recognition

2021-01-17 16:12:44
Cheng Yi, Shiyu Zhou, Bo Xu

Abstract

Self-supervised acoustic pre-training has achieved impressive results on low-resource speech recognition tasks. It indicates that the pretrain-and-finetune paradigm is a promising direction. In this work, we propose an end-to-end model for the low-resource speech recognition, which fuses a pre-trained audio encoder (wav2vec2.0) and a pre-trained text decoder (BERT). The two modules are connected by a linear attention mechanism without parameters. A fully connected layer is introduced for hidden mapping between speech and language modalities. Besides, we design an effective fine-tuning strategy to preserve and utilize the text context modeling ability of the pre-trained decoder. Armed with this strategy, our model exhibits distinct faster convergence and better performance. Our model achieves approaching recognition performance in CALLHOME corpus (15h) as the SOTA pipeline modeling.

Abstract (translated)

URL

https://arxiv.org/abs/2101.06699

PDF

https://arxiv.org/pdf/2101.06699.pdf


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