Digital Television Dr. Nikos Desypris, ndessipris@yahoo.com Dr. Vassilis Tsetsos, btsetsos@mobics.gr Oct. 2017 Postgraduate course University of Athens

Course Outline Digital Television System (N. Dessipris, 6 weeks) IPTV & programming iTV applications (V. Tsetsos, 6 weeks) Group assignments (1 week)

Course brief description Pre-requisites: Basic concepts of digital processing and IP protocols desirable, but not necessary Presents concepts and applications related to commercial Television Systems Provides information on image processing and the human visual system Covers digital terrestrial, cable, satellite TV and IPTV. Half of the course is devoted to IPTV, including IPTV services and technologies Course evaluation mainly through ‘assignments’

Convergence From analogue TV and data transmission as distinct parallel paths, to complete disappearance of distinction between data and television! For historical and practical reasons, in this course digital TV and IPTV are presented separately I

Digital Television Systems Dr. Nikolaos Desypris ndessipris@yahoo.com; nikos.dessipris@iccs.gr

Digital Television System Design Video Standards: signals, formats The capturing system Digital Video Encoding (MPEG series) Digital video transmission Digital video reception

(sampling and quantisation - lossy) DTV block diagram Scene (3D Image, Time & Audio) Human Observer CAMERA Analogue sensor + A/D converter (sampling and quantisation - lossy) D/A converter Video adapter Compression (lossy) Decompression TRANSMISSION (Terrestrial, Satellite, Cable, IPTV) Receiver

Other DTV topics (1 of 3) Brief History of TV From B/W to colour analogue TV and now on DTV Light and the Electromagnetic Spectrum The Human Visual System Description & Limitations Digital Images and Digital Image Processing

Other DTV topics (2 of 3) Imaging Sensors Sampling and Quantization How analogue video and audio becomes digital The Nyquist theorem Signals and frequencies (harmonics) Fourier Transform FT & Power Spectrum Signal Presentation in Time and Frequency domains: Discrete FT (DFT) & Inverse DFT (IDFT) ; Discrete Cosine Transform (DCT) & Inverse DCT (IDCT) ; DCT and TV coding

Other DTV topics (3 of 3) DTV world wide systems

IPTV & programming iTV applications Dr. Vassilis Tsetsos email: btsetsos@mobics.gr ;

IPTV and DTV Network Architecture IPTV & key protocols: IP Multicast, Internet Group Management Protocol – IGMP (integral part of IP mulitcast, used on IPv4 networks) MPEG-DASH (Dynamic Adaptive Streaming of HTTP – similar to Apple’s HTTP Live Streaming -HLS) DTV Network Architecture Overall network Receiver

DTV Standards DTV Standards Their evolution Current status DVB (Digital Video Broadcasting) HbbTV (Hybrid Broadcast Broadband TV)

Programming iTV Applications Programming iTV Applications Part 1: MHP (Multimedia Home Platform) Basics of a MHP Application MHP Application Demo (code structure and high-level review) Programming iTV Applications Part 2: Smart TV Basics of a Smart TV Application Smart TV Application Demo (code structure and high-level review)

Other topics DTV Metadata, Value Added Services & Advertising Introduction to metadata TVAnytime MPEG-7 Advertising models Business models Other value added services UX issues Research topics Protocols: DLNA (Digital Living Network Alliance), UPnP (Universal Plug and Play, a set of networking protocols)

Assignments Exam exercise: 1 or 2 person teams Report based on literature or Programming project Presentation at the end of the course