Modality Confidence Aware Training for Robust End-to-End Spoken Language Understanding

August 14, 2023

Abstract

End-to-end (E2E) spoken language understanding (SLU) systems that generate a semantic parse from speech have become more promising recently. This approach uses a single model that utilizes audio and text representations from pre-trained speech recognition models (ASR), and outperforms traditional pipeline SLU systems in on-device streaming scenarios. However, E2E SLU systems still show weakness when text representation quality is low due to ASR transcription errors. To overcome this issue, we propose a novel E2E SLU system that enhances robustness to ASR errors by fusing audio and text representations based on the estimated modality confidence of ASR hypotheses. We introduce two novel techniques: 1) an effective method to encode the quality of ASR hypotheses and 2) an effective approach to integrate them into E2E SLU models. We show accuracy improvements on STOP dataset and share the analysis to demonstrate the effectiveness of our approach.

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AUTHORS

Written by

Suyoun Kim

Akshat Shrivastava

Duc Le

Ju Lin

Ozlem Kalinli

Mike Seltzer

Publisher

Interspeech

Research Topics

Natural Language Processing (NLP)

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