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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Model selection problem 2:<br />
selecting the best topology<br />
• Problem: forcing the absence or the<br />
presence of connections<br />
• Typical ad-hoc solutions<br />
– ergodic HMM (no contraints)<br />
– left to right HMM (for speech)<br />
– circular HMM (for shape recogn<strong>it</strong>ion)<br />
standard ergodic HMM<br />
circular HMM [Arica,Yarman-Vural<br />
ICPR00]<br />
62<br />
Left to right HMM<br />
[Jelinek, Proc. IEEE 1976]<br />
63<br />
8
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