Hierarchical phrase-based model has two main problems. Firstly, without any semantic
guidance, large numbers of redundant rules are extracted. Secondly, it cannot efficiently
capture long reordering. This paper proposes a novel approach to exploiting case frame in
hierarchical phrase-based model in both rule extraction and decoding. Case frame is
developed by case grammar theory, and it captures sentence structure and assigns
components with different case information. Our case frame constraints system holds the …

… Case Frame Constraints for Hierarchical Phrase-based Translation Japanese-Chinese
as an example … • Case frame is useful to reduce redundant hierarchical phrase rules, and
to ensure the linguistic derivation …