A large scale ranker-based system for search query spelling correction

  • Authors:
  • Jianfeng Gao;Xiaolong Li;Daniel Micol;Chris Quirk;Xu Sun

  • Affiliations:
  • Microsoft Research, Redmond;Microsoft Corporation;Microsoft Corporation;Microsoft Research, Redmond;University of Tokyo

  • Venue:
  • COLING '10 Proceedings of the 23rd International Conference on Computational Linguistics
  • Year:
  • 2010

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Abstract

This paper makes three significant extensions to a noisy channel speller designed for standard written text to target the challenging domain of search queries. First, the noisy channel model is subsumed by a more general ranker, which allows a variety of features to be easily incorporated. Second, a distributed infrastructure is proposed for training and applying Web scale n-gram language models. Third, a new phrase-based error model is presented. This model places a probability distribution over transformations between multi-word phrases, and is estimated using large amounts of query-correction pairs derived from search logs. Experiments show that each of these extensions leads to significant improvements over the state-of-the-art baseline methods.