Journal of Applied Sciences ›› 2001, Vol. 19 ›› Issue (1): 29-32.
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SHI Xiao-xing, WANG Tai-jun, HE Zhen-ya
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Abstract: In this paper, we investigate the learning algorithm of the second order HMM (HMM2), which includes the forward variable algorithm, backward variable algorithm, Viterbi algorithm and Baum-Welch algorithm. Meanwhile, we study the relationship between the HMM2 and the first order HMM (HMM1), and find that for any HMM2 there always exists a HMM1 which is equal to the HMM2. We propose and prove the equivalent theorem of the HMM2 and HMM1.
Key words: the second order HMM (HMM2), learning algorithm, the first order HMM (HMM1)
CLC Number:
TN912.34
SHI Xiao-xing, WANG Tai-jun, HE Zhen-ya. The Learning Algorithm of the Second Order HMM and Its Relationship with the First Order HMM[J]. Journal of Applied Sciences, 2001, 19(1): 29-32.
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