Abstract
Wavelet theory is emerging as one of the prevalent tool in signal and image processing applications. However, the most suitable mother wavelet for these applications is still a relative question mark amongst researchers. Selection of best mother wavelet through parameterization leads to better findings for the analysis in comparison to random selection. The objective of this article is to compare the performance of the existing members of mother wavelets and to select the most suitable mother wavelet for accurate infant cry classification. Optimal wavelet is found using three different criteria namely the degree of similarity of mother wavelets, regularity of mother wavelets and accuracy of correct recognition during classification processes. Recorded normal and pathological infant cry signals are decomposed into five levels using wavelet packet transform. Energy and entropy features are extracted at different sub bands of cry signals and their effectiveness are tested with four supervised neural network architectures. Findings of this study expound that, the Finite impulse response based approximation of Meyer is the best wavelet candidate for accurate infant cry classification analysis.
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Acknowledgments
The Baby Chillanto Data Base is a property of the Instituto Nacional de Astrofisica Optica y Electronica –CONACYT, Mexico. We like to thank Dr. Carlos A. Reyes-Garcia, Dr. Emilio Arch-Tirado and his INR-Mexico group, and Dr. Edgar M. Garcia-Tamayo for their dedication of the collection of the Infant Cry data base. The authors would like to thank Dr. Carlos Alberto Reyes-Garcia, Researcher, CCC-Inaoep, Mexico for providing infant cry database. All authors declare that they have no financial or any commercial conflicts of interest.
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Saraswathy, J., Hariharan, M., Nadarajaw, T. et al. Optimal selection of mother wavelet for accurate infant cry classification. Australas Phys Eng Sci Med 37, 439–456 (2014). https://doi.org/10.1007/s13246-014-0264-y
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DOI: https://doi.org/10.1007/s13246-014-0264-y