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Explaining the Attention Mechanism of End-to-End Speech Recognition Using Decision Trees

2021-10-08 03:36:09
Yuanchao Wang, Wenji Du, Chenghao Cai, Yanyan Xu

Abstract

The attention mechanism has largely improved the performance of end-to-end speech recognition systems. However, the underlying behaviours of attention is not yet clearer. In this study, we use decision trees to explain how the attention mechanism impact itself in speech recognition. The results indicate that attention levels are largely impacted by their previous states rather than the encoder and decoder patterns. Additionally, the default attention mechanism seems to put more weights on closer states, but behaves poorly on modelling long-term dependencies of attention states.

Abstract (translated)

URL

https://arxiv.org/abs/2110.03879

PDF

https://arxiv.org/pdf/2110.03879.pdf


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