New Derivation for Gaussian Mixture Model Parameter Estimation: MM Based Approach
Signal Processing
2020-01-10 v1
Abstract
In this letter, we revisit the problem of maximum likelihood estimation (MLE) of parameters of Gaussian Mixture Model (GMM) and show a new derivation for its parameters. The new derivation, unlike the classical approach employing the technique of expectation-maximization (EM), is straightforward and doesn't invoke any hidden or latent variables and calculation of the conditional density function. The new derivation is based on the approach of minorization-maximization and involves finding a tighter lower bound of the log-likelihood criterion. The update steps of the parameters, obtained via the new derivation, are same as the update steps obtained via the classical EM algorithm.
Cite
@article{arxiv.2001.02923,
title = {New Derivation for Gaussian Mixture Model Parameter Estimation: MM Based Approach},
author = {Nitesh Sahu and Prabhu Babu},
journal= {arXiv preprint arXiv:2001.02923},
year = {2020}
}