|Politecnico di Torino|
|Academic Year 2007/08|
Processing and trasmission of multimedia information
Master of science-level of the Bologna process in Computer Engineering - Torino
Objectives of the course
In this course students will gain a basic understanding of the principles behind coding, compression and transmission of multimedia signals over IP networks.
In the first part, the course will describe the main application scenarios and it will define the most important parameters for Quality of Service (QoS).
Principles of digital coding of text, speech, audio, images, and video will be discussed along with the main techniques for multimedia compression, including references to the most widespread international standards.
The course will also deal with problems related to transmission robustness introducing the concepts of layered coding, forward-error correction, and rate adaptive solutions.
In the second part, after a brief introduction to transmission protocols (UDP, RTP, RTSP), the course will look also into the most important proposals, currently under discussion, for the introduction of quality of service guarantees in IP networks.
Particular interest will be given to the Integrated Services (IntServ) and Differentiated Services (DiffServ) models, and to the MultiProtocol Label Switching (MPLS) technique.
The course will end with the analysis of QoS routing and policing.
Introduction and objectives
Quality of Service for multimedia communications
- Delay variations (jitter)
- Packet losses
- Interactive bidirectional services (IP telephony, videoconferencing)
- Live broadcast services
- On-demand services
- Introduction to compression
- Lossy and lossless compression techniques
- Speech signals (LPC, CELP, sub-band)
- Audio (MP3, AAC)
- Images (JPEG, JPEG-2000)
- Video (MPEG, MPEG2, MPEG4)
- Layered coding
- Forward error correction
- Rate-adaptive techniques
Multimedia transmission protocols
- RTP and RTCP
- RTSP (Real-Time Streaming Protocol)
The Integrate Services Model
- QoS Specification
- Admission control, negotiation and renegotiation
- Advance service reservation
- Traffic policing
- Resource reservation protocols: RSVP.
The Differentiated Services Model
- Service classification: Assured Service, Expedited Forwarding
- Service level agreement, service allocation and resource allocation
- Traffic policing and scheduling
- Case Study: Design of a DiffServ network
QoS routing, MultiProtocol Label Switching
Programma definitivo per l'A.A.2010/11