Inversion Transduction Grammar for Joint Phrasal Translation Modeling

  title={Inversion Transduction Grammar for Joint Phrasal Translation Modeling},
  author={Colin Cherry and Dekang Lin},
We present a phrasal inversion transduction grammar as an alternative to joint phrasal translation models. This syntactic model is similar to its flatstring phrasal predecessors, but admits polynomial-time algorithms for Viterbi alignment and EM training. We demonstrate that the consistency constraints that allow flat phrasal models to scale also help ITG algorithms, producing an 80-times faster inside-outside algorithm. We also show that the phrasal translation tables produced by the ITG are… CONTINUE READING

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