A maximum entropy approach to combining word alignments

TitleA maximum entropy approach to combining word alignments
Publication TypeConference Papers
Year of Publication2006
AuthorsAyan N F, Dorr BJ
Conference NameProceedings of the main conference on Human Language Technology Conference of the North American Chapter of the Association of Computational Linguistics
Date Published2006///
PublisherAssociation for Computational Linguistics
Conference LocationStroudsburg, PA, USA

This paper presents a new approach to combining outputs of existing word alignment systems. Each alignment link is represented with a set of feature functions extracted from linguistic features and input alignments. These features are used as the basis of alignment decisions made by a maximum entropy approach. The learning method has been evaluated on three language pairs, yielding significant improvements over input alignments and three heuristic combination methods. The impact of word alignment on MT quality is investigated, using a phrase-based MT system.