Improving IBM Word Alignment Model 1

@inproceedings{Moore2004ImprovingIW,
  title={Improving IBM Word Alignment Model 1},
  author={R. Moore},
  booktitle={ACL},
  year={2004}
}
  • R. Moore
  • Published in ACL 2004
  • Computer Science
  • We investigate a number of simple methods for improving the word-alignment accuracy of IBM Model 1. We demonstrate reduction in alignment error rate of approximately 30% resulting from (1) giving extra weight to the probability of alignment to the null word, (2) smoothing probability estimates for rare words, and (3) using a simple heuristic estimation method to initialize, or replace, EM training of model parameters. 
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