Analysing Soft Syntax Features and Heuristics for Hierarchical Phrase Based Machine Translation
David Vilar, D. L. Stein, Hermann Ney · 2008
Similar to phrase-based machine translation, hier-archical systems produce a large proportion of phrases, most of which are supposedly junk and useless for the actual translation. For the hierarchical case, however, the amount of extracted rules is an order of magni-tude bigger. In this paper, we investigate several soft constraints in the extraction of hierarchical phrases and whether these help as additional scores in the decoding to prune unneeded phrases. We show the methods that help best. 1.