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This work proposes evidence using zero frequency filtering (ZFF) that gives an approximate measure of vocal tract constriction in terms of the low frequency component present in the speech signal. The vocal tract is completely closed in the case of voice bars and nasals and is wide open for low vowels. Intermediate cases are for high vowels, semivowels, laterals, voiced fricatives and other sounds...
This work proposes a modified zero frequency filtering (ZFF) method for epoch extraction from emotional speech. Epochs refers the instants of maximum excitation of the vocal tract. In the conventional ZFF method, the epochs are estimated by trend removing the output of the zero frequency resonator (ZFR) using the window length equal to the average pitch period of the utterance. Use of this fixed window...
The objective of this work is to develop and study the robustness of the zero frequency resonator (ZFR) based method for extraction of the fundamental frequency (F0) of speech signals. The proposed ZFR method for estimating F0 consists of zero frequency filtering of the Hilbert envelope (HE) of the linear prediction (LP) residual of speech signal, followed by short-term spectrum analysis of the filtered...
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