Multimedia communications (2011/2012)

Course code
Name of lecturer
Gloria Menegaz
Gloria Menegaz
Number of ECTS credits allocated
Other available courses
Academic sector
Language of instruction
II semestre dal Mar 1, 2012 al Jun 15, 2012.

Lesson timetable

II semestre
Day Time Type Place Note
Wednesday 11:30 AM - 1:30 PM lesson Lecture Hall B  
Thursday 4:30 PM - 5:30 PM lesson Lecture Hall I  
Friday 9:30 AM - 11:30 AM lesson Laboratory Alfa  

Learning outcomes

The course deals with the wavelet transform and its applications in image and signal processing. The WT can be considered as a generalization of the Fourier transform to the time/frequency (or time/scale) analysis domain. Accordingly, it allows to overcome some of the main limitations of the FT as the analysis of transient signals that can be characterized with precisely in both the time and the frequency spaces at the same time. Multiresolution analysis is particularly suitable for natural and biological signals, feature extraction for pattern recognition, denoising and image coding.


The course will be complemented by lab sessions aiming at acquiring the practical instruments that are needed in this framework as well as to solve some basic problems. This will be performed using the Matlab Wavelet toolbox.


- A wavelet tour of signal processing, Stephane Mallat, Academic Press (principale riferimento seguito nel corso)
- Wavelets and subband coding, Vetterli and Kovacevic, Prentice Hall


1) Fundamentals of signal and image processing
- Fourier transform in 1D and 2D
- Windowed FT

2) Wavelets and pyramids
- Introduction to the WT
- Wavelet basis
- Wavelet families
- Fast discrete wavelet transform (DWT)
- 2D discrete wavelet transform
- lifting-steps implementation
- Advanced concepts
- Applicatins

3) Advanced coding systems
- Entropy, information, entropy coding
- Wavelet-based coding
- JPEG2000

4) Wavelets in biomedicine

Assessment methods and criteria


The exam consists of two parts.
The first part will concern the first part of the program (up to the 2D DWT included).
The second part can be one of the three following options:
a) Oral on the second part of the course
b) A seminar on as assigned topic
c) A project

Type of exam: oral or written, depending on the number of candidates.


An evaluation of the Lab activities will be performed during the classes. For those who don't take part to the lab sessions the evaluation will be performed during the exam.

Teaching aids