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Improving Speech Recognition for Indic Languages using Language Model

2022-03-30 18:22:12
Ankur Dhuriya, Harveen Singh Chadha, Anirudh Gupta, Priyanshi Shah, Neeraj Chhimwal, Rishabh Gaur, Vivek Raghavan
arXiv_CL
           
Abstract

We study the effect of applying a language model (LM) on the output of Automatic Speech Recognition (ASR) systems for Indic languages. We fine-tune wav2vec $2.0$ models for $18$ Indic languages and adjust the results with language models trained on text derived from a variety of sources. Our findings demonstrate that the average Character Error Rate (CER) decreases by over $28$ \% and the average Word Error Rate (WER) decreases by about $36$ \% after decoding with LM. We show that a large LM may not provide a substantial improvement as compared to a diverse one. We also demonstrate that high quality transcriptions can be obtained on domain-specific data without retraining the ASR model and show results on biomedical domain.

Abstract (translated)

URL

https://arxiv.org/abs/2203.16595

PDF

https://arxiv.org/pdf/2203.16595.pdf

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