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Lukáš Machlica and Zbyněk Zajíc : Factor Analysis and Nuisance Attribute Projection Revisited . Interspeech 2012, p. 1570-1573, Curran Associates, Inc., 2012.

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In the paper Factor Analysis (FA) and Nuisance Attribute Projection (NAP) are reviewed, analyzed and compared. Since nowadays FA become a part of most state-of-the-art recognition systems (used e.g. in the concept of i-vectors or PLDA models) it is of relevance to examine different insights into the problem. NAP was chosen as a counterpart to FA as an advanced PCA like method often utilized in speaker recognition systems along with FA. It is demonstrated how can be both FA and NAP expressed as solutions of Least Squares (LS), the consequences of the LS formulation are discussed, and it is shown in what extent do solutions of NAP and FA overlap.

Detail of publication

Title: Factor Analysis and Nuisance Attribute Projection Revisited
Author: Lukáš Machlica ; Zbyněk Zajíc
Language: English
Date of publication: 9 Sep 2012
Year: 2012
Type of publication: Papers in proceedings of reviewed conferences
Title of journal or book: Interspeech 2012
Page: 1570 - 1573
ISBN: 978-1-62276-759-5
Publisher: Curran Associates, Inc.
Date: 9 Sep 2012 - 13 Sep 2012
/ 2013-09-06 14:05:01 /


NAP, FA, PCA, least squares


 author = {Luk\'{a}\v{s} Machlica and Zbyn\v{e}k Zaj\'{i}c},
 title = {Factor Analysis and Nuisance Attribute Projection Revisited},
 year = {2012},
 publisher = {Curran Associates, Inc.},
 journal = {Interspeech 2012},
 pages = {1570-1573},
 ISBN = {978-1-62276-759-5},
 url = {},