basics course outline, discussion about the course material, reference books, papers, assignments,...
TRANSCRIPT
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Basics
• Course Outline, Discussion about the course material, reference books, papers, assignments, course projects, software packages, etc.
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Introductory Material
• Introductory Remarks about Wavelets, Wavelet-based Signal Processing
• Review of historical trend in signal analysis: From Fourier transform to short-time FT, Gabor transform to wavelet transform
• Why wavelets: comments about some of the main features of wavelets
• Illustration of some of the commonly used wavelets• Illustrative examples of wavelets in signal analysis, some
illustrative demos• Application areas of wavelets
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Introduction
• 3. Background material in signal processing and signal decomposition – Fourier transform(FT), Discrete-time Fourier
transform(DTFT) and discrete-Fourier Transform(DFT), complex exponential bases functions
– Main stages in signal decomposition: analysis, coding and manipulation, and synthesis (signal reconstruction) stage
– Wavelets as bases for signal/ function decomposition•
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Introduction
• Wavelet function: definition and conditions of a function to be a wavelet function– Examples of wavelets function– Examples of different types of wavelet functions– Parameterization of wavelet functions, Shift and
scale in a wavelet function– Two alternatives values for translation and scale
parameters, continuous or discrete( integer) values– Interpretation of scale as a parameter for
frequency
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Introduction, Wavelet Transform
• Wavelet Transform of a given L2 Norm function, definition– Physical interpretation of a wavelet transform, Correlation
of a function with a given analyzing wavelet function– Two alternative wavelet transform, Continuous Wavelet
Transform( CWT), Discrete Wavelet Transform( DWT)– Definition of dyadic wavelet transform, other alternative
wavelet transform structure– Representation of a function in wavelet domain, two
dimensional space of wavelet parameters
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Inverse Wavelet Transform
• Inverse wavelet transform from wavelet coefficients,
• Uniqueness of an Inverse Transform
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Vector and Function Space• Mathematics of function expansion/signal decomposition and
wavelets– Linear Function space, definition and properties– Dimension of a space, finite and infinite dimensional spaces, examples– Basis in a space, linear independent or orthogonal basis set– Nonuniqueness of basis set of given space– Inner product space, Banach and Hilbert spaces, completeness in a
space, properties of inner product– Linear function space, orthogonal, biorthogonal and Riesz bases– Construction of orthogonal/biorthogonal functions from a given
wavelet function( mother function by sequential changes in wavelet scale and translation parameters
• Frames and redundant signal expansion