Black box variational inference allows researchers to easily prototype and evaluate an array of models. Recent advances allow such algorithms to scale to high dimensions. However, a central question remains: How to specify an expressive variational distribution that maintains efficient computation? To address this, we develop hierarchical variational models (HVMs). HVMs augment a variational approximation with a prior on its parameters, which allows it to capture complex structure for both discrete and continuous latent variables. The algorithm we develop is black box, can be used for any HVM, and has the same computational efficiency as the original approximation. We study HVMs on a variety of deep discrete latent variable models. HVMs generalize other expressive variational distributions and maintains higher fidelity to the posterior.
Hierarchical Variational Models
R. Ranganath,Dustin Tran,D. Blei
Published 2015 in International Conference on Machine Learning
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- Publication year
2015
- Venue
International Conference on Machine Learning
- Publication date
2015-11-07
- Fields of study
Mathematics, Computer Science
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