Comparative characteristics of the bases of wavelets to represent the speech signals
Journal Title: Вісник НТУУ КПІ. Серія Радіотехніка, Радіоапаратобудування - Year 2011, Vol 0, Issue 45
Abstract
Wavelets allow us to delineate both a low frequency signal characteristics, and high-frequency components. This property is a significant advantage in problems of speech signal processing in comparison with the windowed Fourier transform, where, by varying the width of the window to choose the scale at which you want to highlight features in the signal. Discrete wavelet transform called the representation of signals in the form of a generalized Fourier series in the system of basic functions that arise from some source wavelet due to shift operations in time and change the time scale. The dependence of the relative error of approximation ofthe upper frequency spectrum, normalized to the scalefor two types of signals: the wavelet function and the Haar wavelet "Mexican hat".
Authors and Affiliations
A. Styskun
Keywords
Related Articles
- EP ID EP309253
- DOI 10.20535/RADAP.2011.45.46-51
- Views 73
- Downloads 0
The investigation of dual frequency microstrip antenna
Paper presents the calculated characteristics of the dual frequency microstrip antenna working in C- and L-bands. Results were obtained by finite-difference time domain method. Dual frequency antenna consists of perforat...
Electromagnetic waves scattering by parabolic lattices of dielectric resonators
Calculation results scattering of plane electromagnetic waves on a parabolic and plane lattices of dielectric resonators in the open space were presented. Every resonator of lattice excited on main azimuthally symmetric...
Mathematical model of frequency steering process for reactive load current
A simulation mathematical model for the frequency control current reactive load was proposed and studied in order to develop a managed source of the magnetic field. An equivalent circuit of a magnetic field source as rea...
Finite element modeling in impedance tomography
The accurate modeling of finite element for solving of direct and inverse task are built.
Radiation non-multiply harmonics in nonlinear junction detector
In the theoretically investigated experimentally detected the effect of negative differential resistance on the current-voltage characteristics OF the diode structures with the impact of powerful MICROWAVE radiation. Pro...