Learning from Large Corpora

• Hand-coded Approaches Limited

  • Corpus + Automatic Training
  • Face Recognition, Speech Recognition, Part-of-Speech Tagging (Sung & Poggio 1995, Rabiner & Juang 1993, Brill et al. 1991)

• Cautionary Note: “Big” problem

Successes

Task Features Influences Training Data Results

ASR 625 3 Phones 5000 sentences 95%

Part-of-Speech 60 Tags 2 POS 1.5 million words 97%

WSD 74,000 senses 100+ words ??? ???

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