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Practical implementation of an efficient forward-backward algorithm for an explicit-duration hidden Markov model

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2 Author(s)
Shun-zheng Yu ; Dept. of Electr. & Commun. Eng., Sun Yat-Sen Univ., Guangzhou, China ; Kobayashi, Hisashi

This correspondence addresses several practical problems in implementing a forward-backward (FB) algorithm for an explicit-duration hidden Markov model. First, the FB variables are redefined in terms of posterior probabilities to avoid possible underflows that may occur in practice. Then, a forward recursion is used that is symmetric to the backward one and can reduce the number of logic gates required to implement on a field-programmable gate-array (FPGA) chip.

Published in:

Signal Processing, IEEE Transactions on  (Volume:54 ,  Issue: 5 )

Date of Publication:

May 2006

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