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28 March 2024
 
  » arxiv » 1203.0038

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Inference in Hidden Markov Models with Explicit State Duration Distributions
Michael Dewar ; Chris Wiggins ; Frank Wood ;
Date 29 Feb 2012
AbstractIn this letter we borrow from the inference techniques developed for unbounded state-cardinality (nonparametric) variants of the HMM and use them to develop a tuning-parameter free, black-box inference procedure for Explicit-state-duration hidden Markov models (EDHMM). EDHMMs are HMMs that have latent states consisting of both discrete state-indicator and discrete state-duration random variables. In contrast to the implicit geometric state duration distribution possessed by the standard HMM, EDHMMs allow the direct parameterisation and estimation of per-state duration distributions. As most duration distributions are defined over the positive integers, truncation or other approximations are usually required to perform EDHMM inference.
Source arXiv, 1203.0038
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