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| ELEN0002-1 | Introduction to Audio and Video Techniques
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| Duration : | 30h Th, 30h Pr |
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| Number of credits : |
| Master in Electrical Engineering, in-depth approach, 1st year | | First semester | | 5 |
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| Master of science in computer science and engineering, in-depth approach, 2nd year | | First semester | | 5 |
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| Master in Computer science, Research Focus, 2nd year | | First semester | | 6 |
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| Master en ingénieur civil électricien, à finalité spécialisée en technologies durables en automobile, 1st year | | First semester | | 5 |
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| Master in Electrical Engineering, specialized approach, 1st year | | First semester | | 5 |
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| Lecturer : | Jean‑Jacques Embrechts |
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Language(s) of instruction :
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| French language |
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Course contents :
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| Course description :
This course addresses the basic principles of the methods and techniques used in audio and video. It mainly emphasizes the signals and their properties, both in audio and video, both in the analog and digital domains. For the audio signal, the devices used for recording and play back are particularly described. Finally, the techniques for audio and video compression are presented.
Contents :
- Fundamentals of acoustics and the audio signal,
- Microphones and loudspeakers,
- Principles of digital audio (introducing the compact disc)
- The video signal (analog and digital)
- Audio and video compression (MPEG). |
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Learning outcomes of the course :
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| At the end of the course, it is intended that the student will be able to:
- identify the principal properties of audio signals in the time and frequency domains,
- determine, analyse and synthesize the frequency response of the condenser microphone as a function of its elements,
- determine, analyse and synthesize the frequency response of the eletrodynamic loudspeaker as a function of its elements,
- measure the principal properties of a loudspeaker in an anechoic room,
- understand the different steps to transform an analog audio signal into a digital signal and vice versa,
- determine the equations that model a simple audio digital system and analyse its behaviour (both through mathematics and listening). For example, in 2010-11, an artificial reverberator,
- identify and measure the principal properties of video signals in the time and frequency domains,
- understand how to digitize a video signal,
- understand the principles of audio and video compression. |
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Prerequisites and co-requisites/ Recommended optional programme components :
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| This course is designed for undergraduate students in engineering. In particular, the following matters must have been learned:
- Control and analysis of systems,
- Fundamentals of signal processing . |
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Planned learning activities and teaching methods :
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| First of all, this course is organised in modules, each of them consisting in a general presentation ex cathedra. Some modules are followed by applications and exercices with the teacher.
Two laboratory measurement sessions are planned, one for the audio signals (and loudspeakers) and the other for video signals. Four groups of students are created and their presence is mandatory. These laboratory sessions are only organised once per academic year.
Finally, it is intended to dedicate one session to a "fresh topic" in audio and video that will be presented by an external expert (depending on the availability).
It is recommended that the students actively participate to the general presentation by answering questions and formulate critics. Also during the exercices, the students must be equipped with a calculator.
It is also recommended to read and understand the theory and exercices of the previous lesson before assisting to the next one. Additional exercices will also be proposed: it is strongly recommended that the students try to solve them by themselves and ask the teacher to evaluate their solution. |
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Mode of delivery (face-to-face ; distance-learning) :
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| Face-to-face learning, except during the laboratory sessions which are supervised by an authorized assistant. |
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Recommended or required readings :
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| The students must have the following book (available at the students' Centrale des Cours):
(in french)
- Introduction aux techniques audio et vidéo(J.J. Embrechts 2011).
The five chapters are also available on-line (see hereafter).
Some further (non mandatory) readings are also suggested in this book. |
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Assessment methods and criteria :
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| A written examination is organised in january. The student will answer to questions concerning the theoretical matters and exercises that have been exposed during the presentations ex-cathedra and the laboratory sessions.
No document can be consulted during this examination, unless otherwise stated (it is recommended to be equipped with an electronic calculator).
The two laboratory reports are part of the evaluation. The student who did not participate to the two laboratory sessions will receive a quotation of zero for this evaluation.
An oral examination is organised during the second session of examination (in august or september). The conditions of this examination are the same as in january, except that the laboratory reports are no longer considered for the evaluation. |
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Organizational remarks :
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| The course is organised during the autumn semester.
Site: Montefiore Institute B28. |
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Contacts :
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| J.J. Embrechts |
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| Items online : |
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| Introduction to audio and video techniques |
(in french)
Introduction aux techniques audio et vidéo |
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