7. Hidden Markov Models (Parte 2) (pdf, it, 413 KB, 4/28/10)
7. Hidden Markov Models (Parte 2) (pdf, it, 413 KB, 4/28/10)
7. Hidden Markov Models (Parte 2) (pdf, it, 413 KB, 4/28/10)
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Some open issues/research trends<br />
1. Model selection<br />
– how many states?<br />
– which topology?<br />
2. Extending standard models<br />
– modifying dependencies or components<br />
3. Injecting discriminative skills into HMM<br />
The general problem: generative vs<br />
discriminative modelling<br />
Generative: one model for<br />
each class/group (e.g. HMM)<br />
generative are better in<br />
describing classes<br />
Discriminative: just model how<br />
to separate classes (e.g. SVM)<br />
discriminative are better in<br />
solving the problem<br />
74<br />
75<br />
14
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