On the use of the derivative of pole trajectories of the LPC analysis parameter sequence as an alternative to delta parameters

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Título:	On the use of the derivative of pole trajectories of the LPC analysis parameter sequence as an alternative to delta parameters
Autor/a:	Freitag, Fèlix; Monte Moreno, Enrique; Hernando Pericás, Francisco Javier
Otros autores:	Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors; Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CNDS - Xarxes de Computadors i Sistemes Distribuïts; Universitat Politècnica de Catalunya. VEU - Grup de Tractament de la Parla
Abstract:	In this paper a new approach for modelling time variations in the speech spectra is presented. We propose to approximate the trajectories of the frequency and amplitude of the poles of the LPC spectra with exponential functions. The obtained time constants of the exponential functions are incorporated in the observation vector and used for recognition in an HMM based recognition system. The performance of the new parameters is tested using a database of connected digits. The recognition rates obtained with the new parameters are compared to results obtained with delta parameters.
Abstract:	Peer Reviewed
Materia(s):	-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Speech processing systems -Processament de la parla
Derechos:	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Tipo de documento:	Artículo - Versión publicada Objeto de conferencia
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