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A Method of Combining Multiple Probabilistic Classifiers through Soft
Competition on Different Feature Sets
A novel method is proposed for combining multiple probabilistic classifiers
on different feature sets. In order to achieve the improved classification
performance, a generalized finite mixture model is proposed as a linear
combination scheme and implemented based on radial basis function networks.
In the linear combination scheme, soft competition on different feature sets is
adopted as an automatic feature rank mechanism so that different feature sets
can be always simultaneously used in an optimal way to determine linear
combination weights. For training the linear combination scheme, a
learning algorithm is developed based on Expectation-Maximization (EM)
algorithm. The proposed method has been applied to a typical real world
problem, viz. speaker identification, in which different feature sets often
need consideration simultaneously for robustness. Simulation results show
that the proposed method yields good performance in speaker identification.
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