Audio Features - Intelligent Audio Analysis - page 89

A number of further measures and search functions exist, and one can also add
additional combinations or alterations of features throughout search, usually by ran-
dom injection or genetic algorithms to limit the search space [ 93 , 105 - 107 ].
If one aims at mere compression of the feature space in the sense of a reduction
rather than selection, i.e., the original feature space still needs to be extracted, PCA,
LDA or similar can be employed (cf. [ 108 ]).
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