Agreement-Based Joint Training for Bidirectional Attention-Based Neural Machine Translation

Yong Cheng,Shiqi Shen,Zhongjun He,W. He,Hua Wu,Maosong Sun,Yang Liu

Published 2015 in International Joint Conference on Artificial Intelligence

ABSTRACT

The attentional mechanism has proven to be effective in improving end-to-end neural machine translation. However, due to the intricate structural divergence between natural languages, unidirectional attention-based models might only capture partial aspects of attentional regularities. We propose agreement-based joint training for bidirectional attention-based end-to-end neural machine translation. Instead of training source-to-target and target-to-source translation models independently, our approach encourages the two complementary models to agree on word alignment matrices on the same training data. Experiments on Chinese-English and English-French translation tasks show that agreement-based joint training significantly improves both alignment and translation quality over independent training.

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