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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad de Carabobo
2000
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| Online Access: | https://www.redalyc.org/articulo.oa?id=70770108 |
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Table of Contents:
- Determinación de la extensión del vibrato en frecuencia basado en los parámetros LPC (codificación de predicción lineal) Jose A. Diaz A. Antonio Arroyo Howard B. Rothman Ingeniería Many time domain signals can be modeled as a sum of sinusoids whose main parameters are amplitude and frequency. The frequency can be obtained from the Linear Predictive Coding (LPC) parameters by the pole location in the Z domain. Although intuition dictates that the amplitude could also be obtained from the LPC parameters, there appears to be no information available that would allow its computation. The purpose of this research is to investigate the relationship between the LPC parameters and the amplitude of a wave in the time domain. In order to accomplish this, the magnitude spectrum obtained using the LPC method was plotted against the FFT magnitude spectrum of vibrato samples. They were then compared, and several parameters of the LPC spectrum were changed until both spectra matched. From the matched spectrum, the wave amplitude was obtained. This new method was then used in an application to determine the time varying amplitude of the vibrato wave. This served two purposes: first, to verify the accuracy of the method, and second, to show the usefulness of the time domain parameters. The results show that there is a direct relationship between the LPC parameters and the amplitude of a wave in the time domain 2000 artículo científico 1316-6832 https://www.redalyc.org/articulo.oa?id=70770108 en http://www.redalyc.org/revista.oa?id=707 Revista INGENIERÍA UC application/pdf Universidad de Carabobo Revista INGENIERÍA UC (República Bolivariana de Venezuela) Num.1 Vol.7