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Time-Domain Speech Enhancement for Robust Automatic Speech Recognition

2022-10-24 15:13:22
Yufeng Yang, Ashutosh Pandey, DeLiang Wang

Abstract

It has been shown that the intelligibility of noisy speech can be improved by speech enhancement algorithms. However, speech enhancement has not been established as an effective front-end for robust automatic speech recognition (ASR) in comparison with an ASR model trained on noisy speech directly. The divide between speech enhancement and ASR impedes the progress of robust ASR systems especially as speech enhancement has made big strides in recent years. In this work, we focus on eliminating such divide with an ARN (attentive recurrent network) based time-domain enhancement model. The proposed system fully decouples speech enhancement and an acoustic model trained only on clean speech. Results on the CHiME-2 corpus show that ARN enhanced speech translates to improved ASR results. The proposed system achieves $6.28\%$ average word error rate, outperforming the previous best by $19.3\%$.

Abstract (translated)

URL

https://arxiv.org/abs/2210.13318

PDF

https://arxiv.org/pdf/2210.13318.pdf


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