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Hybrid-SD : A new hybrid evaluation metric for automatic speech recognition tasks

2022-11-03 11:23:36
Zitha Sasindran, Harsha Yelchuri, Supreeth Rao, T. V. Prabhakar
arXiv_CL
               
Abstract

Many studies have examined the shortcomings of word error rate (WER) as an evaluation metric for automatic speech recognition (ASR) systems, particularly when used for spoken language understanding tasks such as intent recognition and dialogue systems. In this paper, we propose Hybrid-SD ($\text{H}_{\text{SD}}$), a new hybrid evaluation metric for ASR systems that takes into account both semantic correctness and error rate. To generate sentence dissimilarity scores (SD), we built a fast and lightweight SNanoBERT model using distillation techniques. Our experiments show that the SNanoBERT model is 25.9x smaller and 38.8x faster than SRoBERTa while achieving comparable results on well-known benchmarks. Hence, making it suitable for deploying with ASR models on edge devices. We also show that $\text{H}_{\text{SD}}$ correlates more strongly with downstream tasks such as intent recognition and named-entity recognition (NER).

Abstract (translated)

URL

https://arxiv.org/abs/2211.01722

PDF

https://arxiv.org/pdf/2211.01722.pdf

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