# Understanding the Probabilistic Latent Component Analysis Framework

Probabilistic Component Latent Analysis (PLCA) is a statistical modeling method for feature extraction from non-negative data. It has been fruitfully applied to various research fields of information retrieval. However, the EM-solved optimization problem coming with the parameter estimation of PLCA-based models has never been properly posed and justified. We then propose in this short paper to re-define the theoretical framework of this problem, with the motivation of making it clearer to understand, and more admissible for further developments of PLCA-based computational systems.

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**Affiliations:**

^{1}LPMA, UAC,

^{2}LPMA

**Category:**Statistics - Methodology

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