The MeMAD Submission to the IWSLT 2018 Speech Translation Task

Umut Sulubacak, Jörg Tiedemann, Aku Rouhe, Stig-ArneGrönroos, Mikko Kurimo


Abstract
This paper describes the MeMAD project entry to the IWSLT Speech Translation Shared Task, addressing the translation of English audio into German text. Between the pipeline and end-to-end model tracks, we participated only in the former, with three contrastive systems. We tried also the latter, but were not able to finish our end-to-end model in time. All of our systems start by transcribing the audio into text through an automatic speech recognition (ASR) model trained on the TED-LIUM English Speech Recognition Corpus (TED-LIUM). Afterwards, we feed the transcripts into English-German text-based neural machine translation (NMT) models. Our systems employ three different translation models trained on separate training sets compiled from the English-German part of the TED Speech Translation Corpus (TED-TRANS) and the OPENSUBTITLES2018 section of the OPUS collection. In this paper, we also describe the experiments leading up to our final systems. Our experiments indicate that using OPENSUBTITLES2018 in training significantly improves translation performance. We also experimented with various preand postprocessing routines for the NMT module, but we did not have much success with these. Our best-scoring system attains a BLEU score of 16.45 on the test set for this year’s task.
Anthology ID:
2018.iwslt-1.13
Volume:
Proceedings of the 15th International Conference on Spoken Language Translation
Month:
October 29-30
Year:
2018
Address:
Brussels
Editors:
Marco Turchi, Jan Niehues, Marcello Frederico
Venue:
IWSLT
SIG:
SIGSLT
Publisher:
International Conference on Spoken Language Translation
Note:
Pages:
89–94
Language:
URL:
https://aclanthology.org/2018.iwslt-1.13
DOI:
Bibkey:
Cite (ACL):
Umut Sulubacak, Jörg Tiedemann, Aku Rouhe, Stig-ArneGrönroos, and Mikko Kurimo. 2018. The MeMAD Submission to the IWSLT 2018 Speech Translation Task. In Proceedings of the 15th International Conference on Spoken Language Translation, pages 89–94, Brussels. International Conference on Spoken Language Translation.
Cite (Informal):
The MeMAD Submission to the IWSLT 2018 Speech Translation Task (Sulubacak et al., IWSLT 2018)
Copy Citation:
PDF:
https://aclanthology.org/2018.iwslt-1.13.pdf
Data
TED-LIUM