Short-time Wavelet Analysis of Analytic Residuals for Real-time Spectral Modelling
نویسندگان
چکیده
This paper describes an approach to using compactly supported spline wavelets to model the residual signal in a real-time (frameby-frame) spectral modelling system. The outputs of the model are time-varying parameters (gain, centre frequency and bandwidth) for filters which can be used in a subtractive resynthesis system.
منابع مشابه
Some New Methods for Prediction of Time Series by Wavelets
Extended Abstract. Forecasting is one of the most important purposes of time series analysis. For many years, classical methods were used for this aim. But these methods do not give good performance results for real time series due to non-linearity and non-stationarity of these data sets. On one hand, most of real world time series data display a time-varying second order structure. On th...
متن کاملInvestigation of the Relations between Crude Oil Prices and Real Effective Exchange Rate (REER) in Iran using Phase-Angle Analysis
Abstract: This paper discusses two topics. At first, it uses continuous wavelet (Morlet) transform, coherency, and phase angle analysis to study the effect of mean volatility in OPEC Crude Oil prices, WTI crude oil prices, Brent Crude oil prices and Iran’s crude oil prices on The Iran’s REER. To this end, the monthly data of the variables for years 2003 to 2012 is used. Coherency analysis rev...
متن کاملAmplitude, Phase and Frequency Estimation based on the Analytic Representation of Power System Signals
Power Quality problems have a significant impact in electrical power systems. Therefore, real-time techniques to detect and quantify these problems are getting much attention. This paper proposes a new approach based on the real wavelet transform of the analytic representation of distorted power signals. To generate the analytic signal, two methods are given. The first method is based on Fast F...
متن کاملA Real Time Adaptive Multiresolution Adaptive Wiener Filter Based On Adaptive Neuro-Fuzzy Inference System And Fuzzy evaluation
In this paper, a real-time denoising filter based on modelling of stable hybrid models is presented. Thehybrid models are composed of the shearlet filter and the adaptive Wiener filter in different forms.The optimization of various models is accomplished by the genetic algorithm. Next, regarding thesignificant relationship between Optimal models and input images, changing the structure of Optim...
متن کاملSensorless Speed Measurement of AC Machines Using Analytic Wavelet Transform
A new method for sensorless speed estimation of ac machines, using the analytic wavelet transform of the stator current signal, is proposed for a direct torque control drive. A comparison with results obtained using the short-time Fourier transform is included. The proposed method can be implemented in real time on a digital signal processor. The time–frequency resolution obtained and the compu...
متن کامل