Title :
Estimating singularities with reassigned distributions
Author :
Chassande-Mottin, Eric ; Auge, François ; Flandrin, Patrick
Author_Institution :
Albert Einstein Inst., Max Planck Inst. fur Gravitationsphysik, Gohm, Germany
Abstract :
Sharply localized time-frequency and time-scale distributions can be obtained by means of a nonlinear technique referred to as reassignment. The basics of reassignment are recalled in the case of both spectrograms and scalograms (i.e., short-time Fourier and wavelet-based energy densities, respectively), with emphasis on their usefulness for characterizing isolated Holder singularities as well as oscillating singularities
Keywords :
Fourier transforms; parameter estimation; signal processing; spectral analysis; statistical analysis; time-frequency analysis; wavelet transforms; isolated Holder singularities; localized time-frequency distribution; localized time-scale distribution; nonlinear technique; nonstationary signals; oscillating singularities; reassigned distributions; scalograms; short-time Fourier density; singularities estimation; spectrograms; time-frequency analysis; wavelet-based energy density; Distributed computing; Energy resolution; Fourier transforms; Interference; Kernel; Smoothing methods; Spectrogram; Time frequency analysis; Wavelet analysis; Wavelet transforms;
Conference_Titel :
Signal Processing Proceedings, 2000. WCCC-ICSP 2000. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-5747-7
DOI :
10.1109/ICOSP.2000.894510
