Papers › Impact of representation matching with neural machine translation
Impact of representation matching with neural machine translation
HeeSeung Jung, Kangil Kim, Jong-Hun Shin, Seung-Hoon Na, SangKeun Jung, Sangmin Woo
Most neural machine translation models are implemented as a conditional language model framework composed of encoder and decoder models. This framework learns complex and long-distant dependencies, but its deep structure causes inefficiency in training. Matching vector representations of source and target sentences improves the inefficiency by shortening the depth from parameters to costs and generalizes NMTs with different perspective to cross-entropy loss. In this paper, we propose matching methods to derive the cost based on constant word embedding vectors of source and target sentences. To find the best method, we analyze impact of the methods with varying structures, distance metrics, and model capacity in a French to English translation task. An optimally configured method is applied to English from and to French, Spanish, and German translation tasks. In the tasks, the method showed performance improvement by 3.23 BLEU in maximum, 0.71 in average. We evaluated the robustness of this method to various embedding distributions and models as conventional gated structures and transformer network, and empirical results showed that it has higher chance to improve performance in those variety.
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