Journal
ELECTRONICS LETTERS
Volume 40, Issue 17, Pages 1055-1056Publisher
IEE-INST ELEC ENG
DOI: 10.1049/el:20045235
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A soft decision algorithm for wavelet decomposition, in which a probability measure is assigned to each frequency band bearing energy, is presented. This soft decision algorithm is used as an approximate estimator of power spectral density. A staircase approximation of power spectral density (PSD) is obtained by plotting the 2 probabilities after an m-stage decomposition. Different wavelet filters are used for estimating the PSD of a speech segment. The type of the wavelet filter used can be selected as a compromise between accuracy and complexity.
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