2024-03-29T12:11:11Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00013073
2023-01-16T03:59:57Z
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Linear Discriminant Analysis Using a Generalized Mean of Class Covariances and Its Application to Speech Recognition
SAKAI, Makoto
KITAOKA, Norihide
NAKAGAWA, Seiichi
open access
Copyright (C) 2008 IEICE
speech recognition
feature extraction
multidimensional signal processing
To precisely model the time dependency of features is one of the important issues for speech recognition. Segmental unit input HMM with a dimensionality reduction method has been widely used to address this issue. Linear discriminant analysis (LDA) and heteroscedastic extensions, e.g., heteroscedastic linear discriminant analysis (HLDA) or heteroscedastic discriminant analysis (HDA), are popular approaches to reduce dimensionality. However, it is difficult to find one particular criterion suitable for any kind of data set in carrying out dimensionality reduction while preserving discriminative information. In this paper, we propose a new framework which we call power linear discriminant analysis (PLDA). PLDA can be used to describe various criteria including LDA, HLDA, and HDA with one control parameter. In addition, we provide an efficient selection method using a control parameter without training HMMs nor testing recognition performance on a development data set. Experimental results show that the PLDA is more effective than conventional methods for various data sets.
Institute of Electronics, Information and Communication Engineers
2008-03-01
eng
journal article
VoR
http://hdl.handle.net/2237/14967
https://nagoya.repo.nii.ac.jp/records/13073
http://www.ieice.org/jpn/trans_online/index.html
0916-8532
IEICE transactions on information and systems
E91-D
3
478
487
https://nagoya.repo.nii.ac.jp/record/13073/files/394.pdf
application/pdf
430.3 kB
2018-02-20