Second-order Hidden Markov Models and Its Application to Computatonal Linguistics
DU Shi-ping, Hai Li · Journal of Sichuan University · 2004
Describe the structure of modified Hidden Markov Models(HMM) on condition that observation noise is not independent of the Markov chain, and research the Baum-Welch algorithm of modified HMM and derive the update parametric estimation equations for modified HMM based on traditional HMM.