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Articles 61 - 61 of 61
Full-Text Articles in Signal Processing
Formant Estimation From Dctc's Using A Feedforward Neural Network, Shubhangi U. Kelkar
Formant Estimation From Dctc's Using A Feedforward Neural Network, Shubhangi U. Kelkar
Electrical & Computer Engineering Theses & Dissertations
Formants are the natural frequencies of the human vocal tract. Existing methods for estimating formants from speech signals are computationally complex and subject to errors for certain type of speech sounds. This thesis describes a method for estimating vowel formant frequencies from Discrete Cosine Transform Coefficients (DCTC's), a form of cepstral coefficients, using a feedforward neural network with back-propagation training. Experimental results are based on a large multispeaker data base. The results are obtained for both a linear transformation and a feedforward neural network with a nonlinear hidden layer. In general, the neural network transformation is superior to the linear …