Using ASR-Generated Text for Spoken Language Modeling

Nicolas Hervé, Valentin Pelloin, Benoit Favre, Franck Dary, Antoine LAURENT, Sylvain Meignier, laurent besacier

Keywords: ASR, language modeling, spoken language, Flaubert, Bert, speech, oral

TL;DR: We use very large amount of automatically transcribed speech data to train language models and we show on two downstream tasks (classification of TV shows and syntactic parsing of speech) that ASR-Generated text can be useful for spoken LM.

Abstract:

This papers aims at improving spoken language modeling (LM) using very large amount of automatically transcribed speech. We leverage the INA (French National Audiovisual Institute) collection and obtain 19GB of text after applying ASR on 350,000 hours of diverse TV shows. From this, spoken language models are trained either by fine-tuning an existing LM (FlauBERT) or through training a LM from scratch.
The new models (FlauBERT-Oral) will be shared with the community and are evaluated not only in terms of word prediction accuracy but also for two downstream tasks : classification of TV shows and syntactic parsing of speech. Experimental results show that FlauBERT-Oral is better than its initial FlauBERT version demonstrating that, despite its inherent noisy nature, ASR-Generated text can be useful to improve spoken language modeling.