Hierarchical latent variable model estimation device, hierarchical latent variable model estimation method, and recording medium
a latent variable and model estimation technology, applied in the field of hierarchical latent variable model estimation device, hierarchical latent variable model estimation method, recording medium, can solve the problems of reducing the marginal likelihood approximation accuracy, algorithm has a problem of extremely high computational complexity, and it is practically impossible to determine the type of observation probability by these two methods
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exemplary embodiment 1
[0053]FIG. 1 is a block diagram showing a structure example of Exemplary Embodiment 1 of a hierarchical latent variable model estimation device according to the present invention. A hierarchical latent variable model estimation device 100 in this exemplary embodiment includes a data input device 101, a hierarchical latent structure setting unit 102, an initialization unit 103, a hierarchical latent variable variational probability computation unit 104, a component optimization unit 105, a gating function optimization unit 106, an optimality determination unit 107, an optimal model selection unit 108, and a model estimation result output device 109.
[0054]The hierarchical latent variable model estimation device 100, upon input of input data 111, optimizes the hierarchical latent structure and the type of observation probability for the input data 111, and outputs the result of optimization as a model estimation result 112.
[0055]FIG. 2 is a block diagram showing a structure example of ...
exemplary embodiment 2
[0105]FIG. 7 is a block diagram showing a structure example of Exemplary Embodiment 2 of a hierarchical latent variable model estimation device according to the present invention. The same structures as those in Exemplary Embodiment 1 are given the same reference signs as in FIG. 1, and their description is omitted. A hierarchical latent variable model estimation device 200 in this exemplary embodiment differs from the hierarchical latent variable model estimation device 100 only in that a hierarchical latent structure optimization unit 201 is connected and the optimal model selection unit 108 is not connected.
[0106]In Exemplary Embodiment 1, the hierarchical latent variable model estimation device 100 optimizes the model of gating functions and components for the hierarchical latent structure candidate, and selects the hierarchical latent structure for optimizing the optimization criterion A. In the hierarchical latent variable model estimation device 200 in this exemplary embodime...
exemplary embodiment 3
[0127]The following describes Exemplary Embodiment 3 of a hierarchical latent variable model estimation device according to the present invention. The hierarchical latent variable model estimation device in this exemplary embodiment differs from the hierarchical latent variable model estimation device 200 only in that the gating function optimization unit 106 is replaced by a gating function optimization unit 113.
[0128]FIG. 11 is a block diagram showing a structure example of the gating function optimization unit 113 in Exemplary Embodiment 3. The gating function optimization unit 113 includes an effective branch node selection unit 113-1 and a branch parameter optimization parallel processing unit 113-2.
[0129]The effective branch node selection unit 113-1 selects only effective branch nodes from the hierarchical latent structure. In detail, through the use of the model 104-5 estimated by the component optimization unit 105, the effective branch node selection unit 113-1 selects onl...
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Abstract
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