Title
Learning to Refine Source Representations for Neural Machine Translation.
Abstract
Neural machine translation (NMT) models generally adopt an encoder-decoder architecture for modeling the entire translation process. The encoder summarizes the representation of input sentence from scratch, which is potentially a problem if the sentence is ambiguous. When translating a text, humans often create an initial understanding of the source sentence and then incrementally refine it along the translation on the target side. Starting from this intuition, we propose a novel encoder-refiner-decoder framework, which dynamically refines the source representations based on the generated target-side information at each decoding step. Since the refining operations are time-consuming, we propose a strategy, leveraging the power of reinforcement learning models, to decide when to refine at specific decoding steps. Experimental results on both Chinese-English and English-German translation tasks show that the proposed approach significantly and consistently improves translation performance over the standard encoder-decoder framework. Furthermore, when refining strategy is applied, results still show reasonable improvement over the baseline without much decrease in decoding speed.
Year
Venue
DocType
2018
arXiv: Computation and Language
Journal
Volume
Citations 
PageRank 
abs/1812.10230
0
0.34
References 
Authors
16
6
Name
Order
Citations
PageRank
xinwei geng101.01
Longyue Wang27218.24
Xing Wang35810.07
Bing Qin4107672.82
Ting Liu52735232.31
Zhaopeng Tu651839.95