To minimize transmission bandwidth in speech based communication systems such as telephone systems, narrowband representation of the signal is generally used. This band-limited signal can able to represent the vowel sounds without much distortion, but it is not suitable for representing consonant sounds, mostly fricative consonants ( th /, sh/, / Isl /, xl/ ch, /, etc). Artificial Band Extensio...

The objective of spectral analysis is to resolve and extract relevant features from experimental data in an optimal fashion. In continuous-wave (cw) electron spin resonance (ESR) spectroscopy, both g values a paramagnetic center hyperfine splitting (A) caused by its interaction with neighboring magnetic nuclei molecule provide important structural electronic information. However, the presence g...

One of the most intuitive representations a waveform is achieved through time-frequency analysis, which depicts how frequency components wave evolve over time. Time-frequency representations, such as spectrogram, are well-known for allowing full-field characterization signal in terms amplitude and phase. However, present methods to capture spectrogram only suited either relatively slow (&lt...

BACKGROUND Areas with high frequency activity within the atrium are thought to be 'drivers' of the rhythm in patients with atrial fibrillation (AF) and ablation of these areas seems to be an effective therapy in eliminating DF gradient and restoring sinus rhythm. Clinical groups have applied the traditional FFT-based approach to generate the three-dimensional dominant frequency (3D DF) maps dur...

During the last two decades, the number of spectral bands in optical remote sensing technology kept growing steadily going from multispectral (MS) to hyperspectral (HS) data sets. HS images employ hundreds of contiguous spectral bands to capture and process spectral information over a range of wavelenghts, compared to the tens of discrete spectral bands used in MS images (Chang, 2003). This inc...