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arXiv · 2203.09163

Modeling Dual Read/Write Paths for Simultaneous Machine Translation

Shaolei Zhang·Yang Feng
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Abstract

Simultaneous machine translation (SiMT) outputs translation while reading source sentence and hence requires a policy to decide whether to wait for the next source word (READ) or generate a target word (WRITE), the actions of which form a read/write path. Although the read/write path is essential to SiMT performance, no direct supervision is given to the path in the existing methods. In this paper, we propose a method of dual-path SiMT which introduces duality constraints to direct the read/write path. According to duality constraints, the read/write path in source-to-target and target-to-source SiMT models can be mapped to each other. As a result, the two SiMT models can be optimized jointly by forcing their read/write paths to satisfy the mapping. Experiments on En-Vi and De-En tasks show that our method can outperform strong baselines under all latency.

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Shaolei Zhang, Yang Feng. 2022-03-22. Modeling Dual Read/Write Paths for Simultaneous Machine Translation. https://arxiv.org/abs/2203.09163

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