The significance of features derived from complex analytic domain representation of speech, for different applications, is investigated. Frequency domain linear prediction (FDLP) coefficients are derived from analytic magnitude and instantaneous frequency (IF) coefficients are derived from analytic phase of speech signals. Minimal pair ABX (MP-ABX) tasks are used to analyse different features a...

An approach is presented to solve the problem of spatial shift wrapping associated with spatial shift estimation-based fringe pattern profilometry (FPP). This problem arises as the result of fringe reuses (that is, use of fringes with periodic light intensity variance), and the spatial shift can only be identified without ambiguity within the range of a fringe width. It is demonstrated that the...

The most common way to define instantaneous amplitude, phase and frequency of a real signal is to use its analytic signal. One of the main advantages of this procedure is that it establishes a one-to-one relationship between any real signal and the pair of functions defining its instantaneous amplitude and phase. However, there are some problems in its physical interpretation but it is shown th...

This paper deals with mechanical fault diagnosis in three-phase induction machines from stator current measurements. According to machine models, mechanical faults lead to amplitude and/or phase modulations of the measured stator current with possibly time varying carrier frequency. The modulation diagnosis requires a univocal definition of the instantaneous phase and amplitude. This is perform...

The paper presents a Web Portal for measurement application based on GRID Service as an innovative solution to provide researchers with a “collection” of measurement algorithms characterized by huge computational burden. In its current version, the portal allows the execution of two different algorithms (i.e. estimation of spectral density power and instantaneous frequency). Other functionaliti...

The phase unwrapping problem is always solved in the hypothesis that the variation rate of the phase function to be reconstructed is not too high, i.e. the phase fringes are not too dense, for significant large areas. There exist cases where this assumption is not true and the classical phase unwrapping approaches fail. For example, Synthetic Aperture Radar (SAR) differential interferometric me...

INTRODUCTION.The RATIO DETECTOR uses a double-tuned transformer to convert the instantaneous frequency variations of the fm input signal to instantaneous amplitude.AM version is shown at A to make it a CWSSB receiver, change the detector to a. 4An FM ratio detector of the type mentioned in the text. It is similar to the.Ratio detector or discriminator was widely used for FM demodulation within ...

The number of research studies have shown that the fault in the stator or rotor generally show sideband frequencies around the mains frequency (50Hz) and it higher harmonics in the spectrum of the Motor Current Signature Analysis (MCSA). However in the present experimental studies such observations have not seen, but any fault either in the stator or the rotor may distort the sinusoidal respons...

Although phase shifts (PS) are frequently used to acquire colored surfaces of static objects, especially when acquisition time is not critical, the periodic nature of relative (wrapped) PS maps makes it necessary to deal with the issue of phase unwrapping. Consequently, multiple phase shifts (MPS) have been widely used as an alternative, but this usually involves a large number of different PS ...