Zero knowledge hidden Markov model inference

J. M. Schwier, R. R. Brooks, C. Griffin, S. Bukkapatnam

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Hidden Markov models (HMMs) are widely used in pattern recognition. HMM construction requires an initial model structure that is used as a starting point to estimate the model's parameters. To construct a HMM without a priori knowledge of the structure, we use an approach developed by Crutchfield and Shalizi that requires only a sequence of observations and a maximum data window size. Values of the maximum data window size that are too small result in incorrect models being constructed. Values that are too large reduce the number of data samples that can be considered and exponentially increase the algorithm's computational complexity. In this paper, we present a method for automatically inferring this parameter directly from training data as part of the model construction process. We present theoretical and experimental results that confirm the utility of the proposed extension.

Original languageEnglish (US)
Pages (from-to)1273-1280
Number of pages8
JournalPattern Recognition Letters
Issue number14
StatePublished - Oct 15 2009

All Science Journal Classification (ASJC) codes

  • Software
  • Signal Processing
  • Computer Vision and Pattern Recognition
  • Artificial Intelligence


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