Spectral Learning of Mixture of Hidden Markov Models
Spectral Learning of Mixture of Hidden Markov Models
复制标题
隐马尔可夫模型混合的谱学习
DOI:
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发表时间:
2014
期刊:
影响因子:
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通讯作者:
Paris Smaragdis
中科院分区:
文献类型:
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作者:
Cem Subakan;Johannes Traa;Paris Smaragdis
In this paper, we propose a learning approach for the Mixture of Hidden Markov Models (MHMM) based on the Method of Moments (MoM). Computational advantages of MoM make MHMM learning amenable for large data sets. It is not possible to directly learn an MHMM with existing learning approaches, mainly due to a permutation ambiguity in the estimation process. We show that it is possible to resolve this ambiguity using the spectral properties of a global transition matrix even in the presence of estimation noise. We demonstrate the validity of our approach on synthetic and real data.