Stephane Mallat's A Wavelet Tour of Signal Processing, Second Edition (Wavelet PDF

By Stephane Mallat

ISBN-10: 0080520839

ISBN-13: 9780080520834

ISBN-10: 012466606X

ISBN-13: 9780124666061

This e-book is meant to function a useful reference for somebody fascinated by the appliance of wavelets to sign processing. It has advanced from fabric used to coach "wavelet sign processing" classes in electric engineering departments at Massachusetts Institute of know-how and Tel Aviv college, in addition to utilized arithmetic departments on the Courant Institute of recent York collage and ?‰colePolytechnique in Paris. Key positive aspects* offers a wide viewpoint at the rules and purposes of temporary sign processing with wavelets* Emphasizes intuitive knowing, whereas offering the mathematical foundations and outline of speedy algorithms* a variety of examples of actual functions to noise elimination, deconvolution, audio and photo compression, singularity and part detection,multifractal research, and time-varying frequency measurements* Algorithms and numerical examples are applied in Wavelab, that is a Matlab toolbox freely on hand over the web* content material is out there on a number of point of complexity, counting on the person reader's needsNew to the second one version* Optical circulate calculation and video compression algorithms* snapshot types with bounded edition services* Bayes and Minimax theories for sign estimation* 2 hundred pages rewritten and so much illustrations redrawn* extra difficulties and subject matters for a graduate path in wavelet sign processing, in engineering and utilized arithmetic

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Extra info for A Wavelet Tour of Signal Processing, Second Edition (Wavelet Analysis & Its Applications)

Example text

Problems of level 3 are often at the interface of research and can provide topics for deeper projects. The book begins with Chapters 2 and 3, which review the Fourier transform properties and elementary discrete signal processing. They provide the necessary background for readers with no signal processing experience. Fundamental properties of local time-frequency transforms are presented in Chapter 4. The wavelet and windowed Fourier transforms are introduced and compared. The measurement of instantaneous frequencies is used to illustrate the limitations of their time-frequency resolution.

0. -0. FIGURE 2. I Gibbs oscillations created by low-pass filters with cut-off frequencies that decrease from left to right. 61) " Hence f ~(t) = f c , h ~ ( t ) + [ f ( t + ) - f(to)]u*h~(t-to). 13) that fc * h~(t) converges uniformly to fc(t) in a neighborhood of to. The following proposition shows that this is not true for u * h~, which creates Gibbs oscillations. 2 (GIBBS) For any ~ > O, ~toosinx dx. 63) Proof 2. 29), is h~(t) = sin((t)/(Trt). Hence 7-) f0 +~176 sin~(t- 7-) ::(t- ~) d~ -::(t- ~) d~.

Since [Lf(t)l <_ f+oo [ h ( u ) l l f ( t - u ) l d u < _ s u p l f ( u ) l cx) u E1R f+~ Ih(u)ldu, oo it is sufficient that f_+~ Ih(u)ldu < + ~ . One can verify that this condition is also necessary if h is a function. We thus say that h is stable if it is integrable. 1 An amplification and delay system is defined by L f (t) -- A f (t - 7). The impulse response of this filter is h(t) -- A 6 ( t - 7). 2 A uniform averaging of f over intervals of size T is calculated by 1 ft+r/2 ~ , I t - T / 2 f(u)du.

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A Wavelet Tour of Signal Processing, Second Edition (Wavelet Analysis & Its Applications) by Stephane Mallat


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