italian version

Aims :

The course aims to present the more important protocols of the modern telecommunications networks. Particular attention is focused on multimedia services. Furthermore the newest audio/video encoding standard will be dealed and the networks planning criteria based on traffic parameters and quality of services evaluations are treated.

Topics :

Videocommmunication systems. Images perception. Vision physiological foundations. Fixed and in motion images. Structure of a videocommunication system. Quality and image characteristics. Video formats. ITU-T CIF and QCIF formats. Bit rates and video quality. Video coding concepts. Source encoding. The source encoder. Rappresentation. Quantization and enthropic encoding.
Motion Compensation (MC). Standards for fixed images. JPEG: coding of fixed images. JPEG 2000. The standards of video coding. Short history of the standardization. H.261, MPEG-1, MPEG-2, MPEG-4. The videotelephonic service. The H.263 standard. H.263+. Sintax stratification. Image (Picture Layer). Group of blocks (GOB Layer). Macroblock (Macroblock Layer). Block (Block Layer). Reduction of the temporal redundancy. Motion Compensation. Motion estimation. Differential coding of the motion vectors. Reduction of the spatial redundancy. H.264/MPEG4 AVC standard. H.264: technical description. Bitstream format. Images format. Subdivision of the images in slices, jams and submacroblocks. Structure of the H.264 codec. Main innovation of H.264 on the motion estimation. ITU-T H.323 protocol. Videotelephony and videoconferencing on LAN: problematic of QoS.
Audio (G.711, G.722, G.723, G.728, G.729) and video (H.261, H.263, H.264) coding recommendations. Signalling and control: H.245. Data packaging and synchronization: H.225.0.
Laboratory: Analysis and synthesis of audio/video codecs. Player applications. Objective and subjective methods for audio and video quality estimation. PSNR. Alternative methods.

Textbooks :

William K. Pratt, Digital image processing, Wiley-Interscience, New York,2003.
William Stallings, Cryptography and network security, Prentice Hall,Upper Saddle River, New Jersey, 2003.
William Stallings, High-speed networks: TCP/IP and ATM design principles, Prentice Hall, Upper Saddle River, New Jersey, 2003.
William Stallings, High-speed networks and internets: performance and quality of services, Prentice Hall, Upper Saddle River, New Jersey, 2003.

Exam :

The final exam is a colloquium. In the course of such examination is optional the presentation of individual laboratory plans.

Tutorial Session :

Monday: 9.30-13.30, 15.00-18.00.