Syntax-based language models for statistical machine translation

Eugene Charniak, Kevin Knight, Kenji Yamada


Abstract
We present a syntax-based language model for use in noisy-channel machine translation. In particular, a language model based upon that described in (Cha01) is combined with the syntax based translation-model described in (YK01). The resulting system was used to translate 347 sentences from Chinese to English and compared with the results of an IBM-model-4-based system, as well as that of (YK02), all trained on the same data. The translations were sorted into four groups: good/bad syntax crossed with good/bad meaning. While the total number of translations that preserved meaning were the same for (YK02) and the syntax-based system (and both higher than the IBM-model-4-based system), the syntax based system had 45% more translations that also had good syntax than did (YK02) (and approximately 70% more than IBM Model 4). The number of translations that did not preserve meaning, but at least had good grammar, also increased, though to less avail.
Anthology ID:
2003.mtsummit-papers.6
Volume:
Proceedings of Machine Translation Summit IX: Papers
Month:
September 23-27
Year:
2003
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New Orleans, USA
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MTSummit
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URL:
https://aclanthology.org/2003.mtsummit-papers.6
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Cite (ACL):
Eugene Charniak, Kevin Knight, and Kenji Yamada. 2003. Syntax-based language models for statistical machine translation. In Proceedings of Machine Translation Summit IX: Papers, New Orleans, USA.
Cite (Informal):
Syntax-based language models for statistical machine translation (Charniak et al., MTSummit 2003)
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