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arXiv 2111.08400cs.CLcs.SDeess.AS
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汉语语音识别中语义和语音的综合后校正

Integrated Semantic and Phonetic Post-correction for Chinese Speech Recognition

E.SUN Financial Holding Co., Ltd.(玉山金融控股股份有限公司);National Kaohsiung Normal University(国立高雄师范大学)

Yi-Chang Chen, Chun-Yen Cheng, Chien-An Chen, Ming-Chieh Sung, Yi-Ren Yeh

摘要:

由于自然语言处理的最新进展,一些工作已经将BERT的预训练的掩蔽语言模型(MLM)应用于语音识别的后校正。然而,现有的预训练模型只考虑语义校正,而忽略了单词的语音特征。由于同音异义词错误在汉语自动语音识别中相当普遍,因此仅基于语义的后纠正会降低识别性能。在本文中,我们提出了一种新的方法,共同利用上下文表示和语音信息之间的错误和它的替代候选人,以减轻出错率的中文ASR。我们在真实世界语音识别数据集上的实验结果表明,我们提出的方法具有明显低于基线模型,其中使用预训练的BERT MLM作为校正器。

英文摘要:

Due to the recent advances of natural language processing, several works have applied the pre-trained masked language model (MLM) of BERT to the post-correction of speech recognition. However, existing pre-trained models only consider the semantic correction while the phonetic features of words is neglected. The semantic-only post-correction will consequently decrease the performance since homophonic errors are fairly common in Chinese ASR. In this paper, we proposed a novel approach to collectively exploit the contextualized representation and the phonetic information between the error and its replacing candidates to alleviate the error rate of Chinese ASR. Our experiment results on real world speech recognition datasets showed that our proposed method has evidently lower CER than the baseline model, which utilized a pre-trained BERT MLM as the corrector.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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