The RWTH Aachen University Filtering System for the WMT 2018 Parallel Corpus Filtering Task

Nick Rossenbach, Jan Rosendahl, Yunsu Kim, Miguel Graça, Aman Gokrani, Hermann Ney

Abstract
This paper describes the submission of RWTH Aachen University for the De→En parallel corpus filtering task of the EMNLP 2018 Third Conference on Machine Translation (WMT 2018). We use several rule-based, heuristic methods to preselect sentence pairs. These sentence pairs are scored with count-based and neural systems as language and translation models. In addition to single sentence-pair scoring, we further implement a simple redundancy removing heuristic. Our best performing corpus filtering system relies on recurrent neural language models and translation models based on the transformer architecture. A model trained on 10M randomly sampled tokens reaches a performance of 9.2% BLEU on newstest2018. Using our filtering and ranking techniques we achieve 34.8% BLEU.
Anthology ID:
W18-6487
Volume:
Proceedings of the Third Conference on Machine Translation: Shared Task Papers
Month:
October
Year:
2018
Address:
Belgium, Brussels
Editors:
Ondřej Bojar, Rajen Chatterjee, Christian Federmann, Mark Fishel, Yvette Graham, Barry Haddow, Matthias Huck, Antonio Jimeno Yepes, Philipp Koehn, Christof Monz, Matteo Negri, Aurélie Névéol, Mariana Neves, Matt Post, Lucia Specia, Marco Turchi, Karin Verspoor
Venue:
WMT
SIG:
SIGMT
Publisher:
Association for Computational Linguistics
Note:
Pages:
946–954
Language:
URL:
https://aclanthology.org/W18-6487
DOI:
10.18653/v1/W18-6487
Bibkey:
Cite (ACL):
Nick Rossenbach, Jan Rosendahl, Yunsu Kim, Miguel Graça, Aman Gokrani, and Hermann Ney. 2018. The RWTH Aachen University Filtering System for the WMT 2018 Parallel Corpus Filtering Task. In Proceedings of the Third Conference on Machine Translation: Shared Task Papers, pages 946–954, Belgium, Brussels. Association for Computational Linguistics.
Cite (Informal):
The RWTH Aachen University Filtering System for the WMT 2018 Parallel Corpus Filtering Task (Rossenbach et al., WMT 2018)
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PDF:
https://preview.aclanthology.org/nschneid-patch-5/W18-6487.pdf
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