Topological ordering of function words in hierarchical phrase-based translation

  • Authors:
  • Hendra Setiawan;Min-Yen Kan;Haizhou Li;Philip Resnik

  • Affiliations:
  • University of Maryland Institute for Advanced Computer Studies;National University of Singapore;Institute for Infocomm Research, Singapore;University of Maryland Institute for Advanced Computer Studies

  • Venue:
  • ACL '09 Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP: Volume 1 - Volume 1
  • Year:
  • 2009

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Abstract

Hierarchical phrase-based models are attractive because they provide a consistent framework within which to characterize both local and long-distance reorderings, but they also make it difficult to distinguish many implausible reorderings from those that are linguistically plausible. Rather than appealing to annotation-driven syntactic modeling, we address this problem by observing the influential role of function words in determining syntactic structure, and introducing soft constraints on function word relationships as part of a standard log-linear hierarchical phrase-based model. Experimentation on Chinese-English and Arabic-English translation demonstrates that the approach yields significant gains in performance.