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- W1986381804 abstract "Tree-based clustering is an effective method for sharing the state of an HMM in which clustering is applied to a set of context-dependent models with the phoneme context as the splitting condition. In past papers, the method has been restricted to the single Gaussian HMM. The single Gaussian HMM, however, is insufficient for representing the acoustic features, and an adequate topology (sharing of HMM state) will not necessarily be realized. Furthermore, in order to arrive at a state-sharing model with the desired number of mixtures, the process of doubling the number of mixtures and the embedded training must be iterated after the tree-based clustering, which increases the time for training. Consequently, this paper proposes a method in which the tree-based clustering algorithm for the single Gaussian HMM is extended to the clustering of the mixed Gaussian HMM. The proposed method reduces the training time to approximately one-third that of the conventional method of handling the single Gaussian HMM. A recognition experiment using a phone typewriter and a recognition experiment for continuous word demonstrate that the recognition rate is improved by one to two points. © 2002 Wiley Periodicals, Inc. Syst Comp Jpn, 33(4): 40–49, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/scj.1118" @default.
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- W1986381804 date "2002-03-13" @default.
- W1986381804 modified "2023-09-25" @default.
- W1986381804 title "Tree-based clustering for gaussian mixture HMMs" @default.
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- W1986381804 doi "https://doi.org/10.1002/scj.1118" @default.
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