Information theoretic approach based on entropy for classification of bioacoustics signals

Ng, Chee Han and Sithi V. Muniandy and Jedol Dayou and Ho, Chong Mun and Abdul Hamid Ahmad and Mohd Noh Dalimin (2010) Information theoretic approach based on entropy for classification of bioacoustics signals. In: Progress of Physics Research in Malaysia (PERFIK2009), 7-9 December 2009, Melaka, Malaysia.

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A new hybrid method for automated frog sound identification by incorporating entropy and spectral centroid concept is proposed. Entropy has important physical implications as the amount of "disorder" of a system. This study explores the use of various definitions of entropies such as the Shannon entropy, Kolmogorov-Rényi entropy and Tsallis entropy as measure of information contents or complexity for the purpose of the pattern recognition of bioacoustics signal. Each of these definitions of entropies characterizes different aspects of the signal. The entropies are combined with other standard pattern recognition tools such as the Fourier spectral analysis to form a hybrid spectral-entropic classification scheme. The efficiency of the system is tested using a database of sound syllables are obtained from a number of species of Microhylidae frogs. Nonparametric k-NN classifier is used to recognize the frog species based on the spectral-entropic features. The result showed that the k-NN classifier based on the selected features is able to identify the species of the frogs with relativity good accuracy compared to features relying on spectral contents alone. The robustness of the developed system is also tested for different noise levels. © 2010 American Institute of Physics.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords: Entropy, k-NN classifier, Pattern recognition, Spectral centroid
Subjects: Q Science > QL Zoology > QL1-991 Zoology > QL605-739.8 Chordates. Vertebrates > QL640-669.3 Reptiles and amphibians
Q Science > QC Physics > QC1-999 Physics > QC221-246 Acoustics. Sound
Divisions: SCHOOL > School of Science and Technology
Depositing User: ADMIN ADMIN
Date Deposited: 10 Mar 2011 15:02
Last Modified: 30 Dec 2014 09:27

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