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arXiv · 2508.18701

Attention2Probability: Attention-Driven Terminology Probability Estimation for Robust Speech-to-Text System

Yanfan Du·Jun Zhang·Bin Wang·Jin Qiu·Lu Huang·Yuan Ge·Xiaoqian Liu·Tong Xiao·Jingbo Zhu
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Abstract

Recent advances in speech large language models (SLMs) have improved speech recognition and translation in general domains, but accurately generating domain-specific terms or neologisms remains challenging. To address this, we propose Attention2Probability: attention-driven terminology probability estimation for robust speech-to-text system, which is lightweight, flexible, and accurate. Attention2Probability converts cross-attention weights between speech and terminology into presence probabilities, and it further employs curriculum learning to enhance retrieval accuracy. Furthermore, to tackle the lack of data for speech-to-text tasks with terminology intervention, we create and release a new speech dataset with terminology to support future research in this area. Experimental results show that Attention2Probability significantly outperforms the VectorDB method on our test set. Specifically, its maximum recall rates reach 92.57% for Chinese and 86.83% for English. This high recall is achieved with a latency of only 8.71ms per query. Intervening in SLMs' recognition and translation tasks using Attention2Probability-retrieved terms improves terminology accuracy by 6-17%, while revealing that the current utilization of terminology by SLMs has limitations.

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Yanfan Du, Jun Zhang, Bin Wang, Jin Qiu, Lu Huang, Yuan Ge, Xiaoqian Liu, Tong Xiao, Jingbo Zhu. 2025-08-26. Attention2Probability: Attention-Driven Terminology Probability Estimation for Robust Speech-to-Text System. https://arxiv.org/abs/2508.18701

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