End-to-End Speech Recognition Contextualization with Large Language Models

• URL: http://arxiv.org/abs/2309.10917v1
• Date: Tue, 19 Sep 2023 20:28:57 GMT
• Title: End-to-End Speech Recognition Contextualization with Large Language Models
• Authors: Egor Lakomkin, Chunyang Wu, Yassir Fathullah, Ozlem Kalinli, Michael L. Seltzer, Christian Fuegen
• Abstract summary: We introduce a novel method for contextualizing speech recognition models incorporating Large Language Models (LLMs) We provide audio features, along with optional text tokens for context, to train the system to complete transcriptions in a decoder-only fashion. Our empirical results demonstrate a significant improvement in performance, with a 6% WER reduction when additional textual context is provided.
• Score: 25.198480789044346
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In recent years, Large Language Models (LLMs) have garnered significant attention from the research community due to their exceptional performance and generalization capabilities. In this paper, we introduce a novel method for contextualizing speech recognition models incorporating LLMs. Our approach casts speech recognition as a mixed-modal language modeling task based on a pretrained LLM. We provide audio features, along with optional text tokens for context, to train the system to complete transcriptions in a decoder-only fashion. As a result, the system is implicitly incentivized to learn how to leverage unstructured contextual information during training. Our empirical results demonstrate a significant improvement in performance, with a 6% WER reduction when additional textual context is provided. Moreover, we find that our method performs competitively and improve by 7.5% WER overall and 17% WER on rare words against a baseline contextualized RNN-T system that has been trained on more than twenty five times larger speech dataset. Overall, we demonstrate that by only adding a handful number of trainable parameters via adapters, we can unlock contextualized speech recognition capability for the pretrained LLM while keeping the same text-only input functionality.

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