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In this thesis, new wavelet-based techniques have been developed for the
extraction of features from speech signals for the purpose of automatic speech
recognition (ASR). One of the advantages of the wavelet transform over the short
time Fourier transform (STFT) is its capability to process non-stationary signals.
Since speech signals are not strictly stationary the wavelet transform is a better
choice for time-frequency transformation of these signals. In addition it has
compactly supported basis functions, thereby reducing the amount of
computation as opposed to STFT where an overlapping window is needed. [Continues.
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