Passban, Peyman, Liu, Qun ORCID: 0000-0002-7000-1792 and Way, Andy ORCID: 0000-0001-5736-5930 (2018) Improving character-based decoding using target-side morphological information for neural machine translation. In: 16th Annual Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies. (NAACL 2018), 1-6 June 2018, New Orleans, LA, USA.
Abstract
Recently, neural machine translation
(NMT) has emerged as a powerful alternative to conventional statistical approaches.
However, its performance drops considerably in the presence of morphologically
rich languages (MRLs). Neural engines
usually fail to tackle the large vocabulary
and high out-of-vocabulary (OOV) word
rate of MRLs. Therefore, it is not suitable
to exploit existing word-based models
to translate this set of languages. In this
paper, we propose an extension to the
state-of-the-art model of Chung et al.
(2016), which works at the character level
and boosts the decoder with target-side
morphological information. In our architecture, an additional morphology table
is plugged into the model. Each time the
decoder samples from a target vocabulary,
the table sends auxiliary signals from the
most relevant affixes in order to enrich the
decoder’s current state and constrain it to
provide better predictions. We evaluated
our model to translate English into German, Russian, and Turkish as three MRLs
and observed significant improvements.
Metadata
Item Type: | Conference or Workshop Item (Paper) |
---|---|
Event Type: | Conference |
Refereed: | Yes |
Subjects: | Computer Science > Machine translating |
DCU Faculties and Centres: | DCU Faculties and Schools > Faculty of Engineering and Computing > School of Computing Research Institutes and Centres > ADAPT |
Published in: | Proceedings of the 2018 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (Long Papers). 1. Association for Computational Linguistics. |
Publisher: | Association for Computational Linguistics |
Official URL: | http://dx.doi.org/10.18653/v1/N18-1006 |
Copyright Information: | © 2018 Association for Computational Linguistics |
Use License: | This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License |
Funders: | ADAPT Centre for Digital Content Technology which is funded under the SFI Research Centres Programme (Grant 13/RC/2106) and is co-funded under the European Regional Development Fund. |
ID Code: | 23347 |
Deposited On: | 22 May 2019 15:09 by Thomas Murtagh . Last Modified 22 May 2019 15:09 |
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