Neural Machine Translation Decoding with Terminology Constraints

Eva Hasler, Adrià de Gispert, Gonzalo Iglesias, Bill Byrne


Abstract
Despite the impressive quality improvements yielded by neural machine translation (NMT) systems, controlling their translation output to adhere to user-provided terminology constraints remains an open problem. We describe our approach to constrained neural decoding based on finite-state machines and multi-stack decoding which supports target-side constraints as well as constraints with corresponding aligned input text spans. We demonstrate the performance of our framework on multiple translation tasks and motivate the need for constrained decoding with attentions as a means of reducing misplacement and duplication when translating user constraints.
Anthology ID:
N18-2081
Volume:
Proceedings of the 2018 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 2 (Short Papers)
Month:
June
Year:
2018
Address:
New Orleans, Louisiana
Venue:
NAACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
506–512
Language:
URL:
https://www.aclweb.org/anthology/N18-2081
DOI:
10.18653/v1/N18-2081
Bib Export formats:
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PDF:
http://aclanthology.lst.uni-saarland.de/N18-2081.pdf