State inference in variational bayesian nonlinear state-space models

  • Authors:
  • Tapani Raiko;Matti Tornio;Antti Honkela;Juha Karhunen

  • Affiliations:
  • Neural Networks Research Centre, Helsinki University of Technology, HUT, Espoo, Finland;Neural Networks Research Centre, Helsinki University of Technology, HUT, Espoo, Finland;Neural Networks Research Centre, Helsinki University of Technology, HUT, Espoo, Finland;Neural Networks Research Centre, Helsinki University of Technology, HUT, Espoo, Finland

  • Venue:
  • ICA'06 Proceedings of the 6th international conference on Independent Component Analysis and Blind Signal Separation
  • Year:
  • 2006

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Abstract

Nonlinear source separation can be performed by inferring the state of a nonlinear state-space model. We study and improve the inference algorithm in the variational Bayesian blind source separation model introduced by Valpola and Karhunen in 2002. As comparison methods we use extensions of the Kalman filter that are widely used inference methods in tracking and control theory. The results in stability, speed, and accuracy favour our method especially in difficult inference problems.