Digital Image and Sound Processing (2008/2009)

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Course code
4S00047
Credits
10
Coordinator
Vittorio Murino
Teaching is organised as follows:
Unit Credits Academic sector Period Academic staff
Laboratorio Immagini 1 INF/01-INFORMATICS 2° Q Vittorio Murino
Immagini 4 INF/01-INFORMATICS 2° Q Vittorio Murino
Laboratorio Suoni 1 INF/01-INFORMATICS 1° Q Federico Fontana
Suoni 4 INF/01-INFORMATICS 1° Q Federico Fontana

Learning outcomes

Module: Sound
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The class gives the basic theoretical fundamentals and some methods for the generation and processing of sound.
Sound processing is important for designing multimedia systems. The auditory channel is always open and able to discriminate or integrate acoustic events. Vice versa, the visual system is suited for detecting and organizing spatial information. This gives importance to audio-visual communication in contemporary computer science.
After a short introduction to psycho-acoustics, the main techniques for analyzing, processing, and synthesizing sounds by computer are presented.
The course gives the tools and fundamental techniques for understanding and manipulating sounds for the purpose of creating interfaces, compressing and transmitting information, analyzing scenes, etc. .

Module: Laboratory Sound
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An experimental complement of the theoretical lectures on sound generation and processing.


Module: Images
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Module: Laboratory Images
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An experimental complement of the theoretical lectures on image processing.

Syllabus

Module: Sound
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* Elements of psychoacoustics and auditory perception
* Discretization of continuous-time signals and systems
* Transforms: Laplace, Fourier, Zeta
* Digital filters: first and second-order filters. Allpass filters. Complementary filters. Filter banks. Frequency warping.
* Sound synthesis: classic techniques, physical models (hints).
* Digital audio effects: processing in time and frequency. Sound spatialization and reverberation.
* Sound analysis (hints)

The course coordinates with the following module on Images. In the first module we work on one-dimensional signals (sounds), while in the second we work on two-dimensional signals (images).

Module: Laboratory Sound
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The lab activities are done with softwares such as MATLAB or Octave.


Module: Images
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* Image acquisition: mathematical models, sampling and quantization
* Image Transforms: Fourier
* Filtering: histograms, noise modeling and reduction, punctual and local operators, geometri operators, low-, band-, and high-pass filters, optimal filters, nonlinear filters.
* Extraction and characterization of edges.
* Extraction and characterization of regions.

Module: Laboratory Images
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The lab activities are done using softwares like MATLAB or Octave.


In total, in the two periods we give 64 hours of front lectures and 24 hours of laboratory.

Assessment methods and criteria

Module: Sound
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A written test for each module, where questions aim at verifying the understanding of theoretical concepts and the mastering of the mathematical and computer tools.
Students that are exceptionally motivated can develop a project and defend it, after negotiation with the teacher.

Module: Laboratory Sound
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The Laboratory exam is not distinct fron the exam of the base course.


Module: Images
-------
A written test for each module, where questions aim at verifying the understanding of theoretical concepts and the mastering of the mathematical and computer tools.
Students that are exceptionally motivated can develop a project and defend it, after negotiation with the teacher.

Module: Laboratory Images
-------
The Laboratory exam is included as an exercise inside the exam of the base course.

Reference books
Author Title Publisher Year ISBN Note
Davide Rocchesso Introduction to Sound Processing (http://www.mondo-estremo.com/) Mondo Estremo 2003 8890112611

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