Automatic Construction of Discourse Corpora for Dialogue Translation

Citation

Wang L, Zhang X, Tu Z, Liu Q & Way A (2016) Automatic Construction of Discourse Corpora for Dialogue Translation. In: Calzolari N, Choukri K, Declerck T T, Goggi S, Grobelnik M, Maegaard B, Mariani J, Mazo H, Moreno A, Odijk J & Piperidis S (eds.) LREC 2016, Tenth International Conference on Language Resources and Evaluation Proceedings. LREC 2016, Tenth International Conference on Language Resources and Evaluation, Portorož, Slovenia, 23.05.2016-28.05.2016. Paris: European Language Resources Association, pp. 2748-2754. http://www.lrec-conf.org/proceedings/lrec2016/pdf/790_Paper.pdf

Abstract
In this paper, a novel approach is proposed to automatically construct parallel discourse corpus for dialogue machine translation. Firstly, the parallel subtitle data and its corresponding monolingual movie script data are crawled and collected from Internet. Then tags such as speaker and discourse boundary from the script data are projected to its subtitle data via an information retrieval approach in order to map monolingual discourse to bilingual texts. We not only evaluate the mapping results, but also integrate speaker information into the translation. Experiments show our proposed method can achieve 81.79% and 98.64% accuracy on speaker and dialogue boundary annotation, and speaker-based language model adaptation can obtain around 0.5 BLEU points improvement in translation qualities. Finally, we publicly release around 100K parallel discourse data with manual speaker and dialogue boundary annotation.

Keywords
Discourse Corpus; Dialogue; Machine Translation; Information Retrieval; Movie Script; Movie Subtitle