Title :
An Analytic Wavelet Transform With a Flexible Time-Frequency Covering
Author_Institution :
Electron. & Commun. Eng., Istanbul Tech. Univ., Istanbul, Turkey
Abstract :
We develop a rational-dilation wavelet transform for which the dilation factor, the Q-factor and the redundancy can be easily specified. The introduced transform contains Hilbert transform pairs of atoms, therefore it is also suitable for oscillatory signal processing. The transform may be modified to obtain a tight chirplet frame for discrete-time signals. A fast implementation, that makes use of an equivalent filter bank, makes the transform suitable for long signals. Examples on natural signals are provided to demonstrate the utility of the transform.
Keywords :
Hilbert transforms; Q-factor; channel bank filters; discrete time filters; signal processing; time-frequency analysis; wavelet transforms; Hilbert transform; Q-factor; analytic rational-dilation wavelet transform; dilation factor; discrete-time signal; equivalent filter bank; flexible time-frequency covering; oscillatory signal processing; redundancy; tight chirplet frame; Atomic clocks; Q factor; Redundancy; Time frequency analysis; Wavelet analysis; Wavelet transforms; Analytic wavelet frame; chirplet; pitch-shifting; rational dilation; rational sampling factor;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2012.2232655