Best of Both Worlds: Making High Accuracy Non-incremental Transformer-based Disfluency Detection Incremental

Morteza Rohanian, Julian Hough


Abstract
While Transformer-based text classifiers pre-trained on large volumes of text have yielded significant improvements on a wide range of computational linguistics tasks, their implementations have been unsuitable for live incremental processing thus far, operating only on the level of complete sentence inputs. We address the challenge of introducing methods for word-by-word left-to-right incremental processing to Transformers such as BERT, models without an intrinsic sense of linear order. We modify the training method and live decoding of non-incremental models to detect speech disfluencies with minimum latency and without pre-segmentation of dialogue acts. We experiment with several decoding methods to predict the rightward context of the word currently being processed using a GPT-2 language model and apply a BERT-based disfluency detector to sequences, including predicted words. We show our method of incrementalising Transformers maintains most of their high non-incremental performance while operating strictly incrementally. We also evaluate our models’ incremental performance to establish the trade-off between incremental performance and final performance, using different prediction strategies. We apply our system to incremental speech recognition results as they arrive into a live system and achieve state-of-the-art results in this setting.
Anthology ID:
2021.acl-long.286
Volume:
Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers)
Month:
August
Year:
2021
Address:
Online
Venues:
ACL | IJCNLP
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
3693–3703
Language:
URL:
https://aclanthology.org/2021.acl-long.286
DOI:
10.18653/v1/2021.acl-long.286
Bibkey:
Cite (ACL):
Morteza Rohanian and Julian Hough. 2021. Best of Both Worlds: Making High Accuracy Non-incremental Transformer-based Disfluency Detection Incremental. In Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers), pages 3693–3703, Online. Association for Computational Linguistics.
Cite (Informal):
Best of Both Worlds: Making High Accuracy Non-incremental Transformer-based Disfluency Detection Incremental (Rohanian & Hough, ACL-IJCNLP 2021)
Copy Citation:
PDF:
https://aclanthology.org/2021.acl-long.286.pdf
Video:
 https://aclanthology.org/2021.acl-long.286.mp4