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arXiv · 1706.05565

Towards Neural Phrase-based Machine Translation

Po-Sen Huang·Chong Wang·Sitao Huang·Dengyong Zhou·Li Deng
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Abstract

In this paper, we present Neural Phrase-based Machine Translation (NPMT). Our method explicitly models the phrase structures in output sequences using Sleep-WAke Networks (SWAN), a recently proposed segmentation-based sequence modeling method. To mitigate the monotonic alignment requirement of SWAN, we introduce a new layer to perform (soft) local reordering of input sequences. Different from existing neural machine translation (NMT) approaches, NPMT does not use attention-based decoding mechanisms. Instead, it directly outputs phrases in a sequential order and can decode in linear time. Our experiments show that NPMT achieves superior performances on IWSLT 2014 German-English/English-German and IWSLT 2015 English-Vietnamese machine translation tasks compared with strong NMT baselines. We also observe that our method produces meaningful phrases in output languages.

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Po-Sen Huang, Chong Wang, Sitao Huang, Dengyong Zhou, Li Deng. 2017-06-17. Towards Neural Phrase-based Machine Translation. https://arxiv.org/abs/1706.05565

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