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arXiv 2201.02550cs.CLcs.SDeess.AS

Textual Data Augmentation for Arabic-English Code-Switching Speech Recognition

KANARI AI(卡纳里人工智能公司);Johns Hopkins University(约翰斯·霍普金斯大学);Qatar Computing Research Institute(卡塔尔计算研究所)

Amir Hussein, Shammur Absar Chowdhury, Ahmed Abdelali, Najim Dehak, Ahmed Ali, Sanjeev Khudanpur

英文摘要:

The pervasiveness of intra-utterance code-switching (CS) in spoken content requires that speech recognition (ASR) systems handle mixed language. Designing a CS-ASR system has many challenges, mainly due to data scarcity, grammatical structure complexity, and domain mismatch. The most common method for addressing CS is to train an ASR system with the available transcribed CS speech, along with monolingual data. In this work, we propose a zero-shot learning methodology for CS-ASR by augmenting the monolingual data with artificially generating CS text. We based our approach on random lexical replacements and Equivalence Constraint (EC) while exploiting aligned translation pairs to generate random and grammatically valid CS content. Our empirical results show a 65.5% relative reduction in language model perplexity, and 7.7% in ASR WER on two ecologically valid CS test sets. The human evaluation of the generated text using EC suggests that more than 80% is of adequate quality.

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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