Estimation of spectral envelope in frequency domain allows to avoid some problems of the Linear Prediction (LP) algorithms for voiced speech. We present a low complexity method of spectral envelope estimation from harmonics for low rate coding. The method consists in computing harmonic amplitude spectrum using pitch-synchronous DFT with length depending on voicing, modifying this spectrum outsi...

Sparse reconstruction methods have been used extensively for source localization over uniform linear arrays and circular arrays. In this paper a sparse reconstruction method for speech source localization using partial dictionaries over a spherical microphone array is proposed. The source localization method proposed in this work addresses two important research issues. It formulates the source...

Measurement of magnetic field is one of critical parameters for Fast ignition in inertial confinement fusion research. Not only that the field inside plasma affects the transport of fast electrons generated in intense laser pulse-plasma interactions, but also that measurement of the field is one of good tools for investigation the current of fast electrons, resulting in estimation of conversion...

The paper describes a method for estimation of the orientation of 3D objects without point correspondence information. It is based on decomposition of the object onto a basis of spherical harmonics. Tensors are obtained, and their normalization provides the orientation of the object. Theoretical and experimental results show that the approach is more accurate than the classical method based on ...

In this paper we present a new method for pitch estimation using a system based on phase-locked-loop devices. Three main blocks define our system. The aim of the first one is to make an harmonic decomposition of the speech signal. This stage is implemented using a band-pass filter bank and phase-lockedloops cascaded to the output of each filter. A second block enhances the harmonic correspondin...

ARTICLE INFO ABSTRACT ARTICLE HISTORY: Received 23 October 2013 Revised 11 December 2013 Accepted 20 December 2013 Pulse-width modulated (PWM) adjustable frequency drives (AFDs) are extensively used in industries for control of induction motors. It has led to significant advantages in terms of the performance, size, and efficiency but the output voltage waveform no longer remains sinusoidal. He...

The nonlinearity parameter is frequently measured as a sensitive indicator in damaged material characterization or tissue harmonic imaging. Several previous studies have employed the plane wave solution, and ignored the effects of beam diffraction when measuring the non-linearity parameter . This paper presents a multiGaussian beam approach to explicitly derive diffraction corrections for fund...