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Latent variable model estimation apparatus, and method
US9043261B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9043261-B2 |
| Application number | US-201213614997-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 13, 2012 |
| Priority date | May 31, 2012 |
| Publication date | May 26, 2015 |
| Grant date | May 26, 2015 |
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Abstract
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To provide a latent variable model estimation apparatus capable of implementing the model selection at high speed even if the number of model candidates increases exponentially as the latent state number and the kind of the observation probability increase. A variational probability calculating unit 71 calculates a variational probability by maximizing a reference value that is defined as a lower bound of an approximation amount, in which Laplace approximation of a marginalized log likelihood function is performed with respect to an estimator for a complete variable. A model estimation unit 72 estimates an optimum latent variable model by estimating the kind and a parameter of the observation probability with respect to each latent state. A convergence determination unit 73 determines whether a reference value, which is used by the variational probability calculating unit 71 to calculate the variational probability, converges.
First claim
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What is claimed is: 1. A latent variable model estimation apparatus comprising: a variational probability calculating unit implemented at least by a hardware including a processor and that calculates a variational probability by maximizing a reference value, the reference value being defined as a lower bound of an approximation amount in which Laplace approximation of a marginalized log likelihood function is performed with respect to an estimator for a complete variable; a mode…
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- What does patent US9043261B2 cover?
- To provide a latent variable model estimation apparatus capable of implementing the model selection at high speed even if the number of model candidates increases exponentially as the latent state number and the kind of the observation probability increase. A variational probability calculating unit 71 calculates a variational probability by maximizing a reference value that is defined as a l…
- Who is the assignee on this patent?
- Fujimaki Ryohei, Morinaga Satoshi, Nec Corp
- What technology area does this patent fall under?
- Primary CPC classification G06F17/18. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 26 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).