Post-editing in Automatic Speech Recognition (ASR) entails automatically correcting common and systematic errors produced by the ASR system. The outputs of an ASR system are largely prone to phonetic and spelling errors. In this paper, we propose to use a powerful pre-trained sequence-to-sequence model, BART, further adaptively trained to serve as a denoising model, to correct errors of such types. The adaptive training is performed on an augmented dataset obtained by synthetically inducing errors as well as by incorporating actual errors from an existing ASR system. We also propose a simple approach to rescore the outputs using word level alignments. Experimental results on accented speech data demonstrate that our strategy effectively rectifies a significant number of ASR errors and produces improved WER results when compared against a competitive baseline.

该研究使用预训练序列到序列模型BART，并对其进行自适应训练来对自动语音识别中的发音和拼写错误进行纠正，并采用词级对齐的简单方法重新评分。实验结果表明，该策略在口音语音数据上有效地矫正了大量ASR错误，并在与基准系统的比较中产生了改进的WER结果。然而，在印地语语法错误纠正任务中，该模型捕捉更广泛上下文的能力受到限制。

使用序列到序列模型进行自动语音识别的误差校正