Recently, end-to-end (E2E) automatic speech recognition (ASR) models have made great strides and exhibit excellent performance in general speech recognition. However, there remain several challenging scenarios that E2E models are not competent in, such as code-switching and named entity recognition (NER). Data augmentation is a common and effective practice for these two scenarios. However, the current data augmentation methods mainly rely on audio splicing and text-to-speech (TTS) models, which might result in discontinuous, unrealistic, and less diversified speech. To mitigate these potential issues, we propose a novel data augmentation method by applying the text-based speech editing model. The augmented speech from speech editing systems is more coherent and diversified, also more akin to real speech. The experimental results on code-switching and NER tasks show that our proposed method can significantly outperform the audio splicing and neural TTS based data augmentation systems.

本文提出了一种基于文本的语音编辑模型的数据增强方法，以改善端到端自动语音识别模型在 code-switching 和命名实体识别方面的效果。实验结果表明，相对于音频拼接和神经 TTS 数据增强系统，本文提出的方法显著地提高了识别水平。

基于语音编辑的数据增强技术，提升语音识别中的语码切换和命名实体识别准确度