Paper: Two-Neighbor Orientation Model with Cross-Boundary Global Contexts

ACL ID P13-1124
Title Two-Neighbor Orientation Model with Cross-Boundary Global Contexts
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 2013
Authors

Long distance reordering remains one of the greatest challenges in statistical ma- chine translation research as the key con- textual information may well be beyond the confine of translation units. In this paper, we propose Two-Neighbor Orien- tation (TNO) model that jointly models the orientation decisions between anchors and two neighboring multi-unit chunks which may cross phrase or rule bound- aries. We explicitly model the longest span of such chunks, referred to as Max- imal Orientation Span, to serve as a global parameter that constrains under- lying local decisions. We integrate our proposed model into a state-of-the-art string-to-dependency translation system and demonstrate the efficacy of our pro- posal in a large-scale Chinese-to-English translation task. On NIST MT08 set, our...