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

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

3. 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’

4. 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

5. Digital Television Systems
Dr. Nikolaos Desypris

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

7. (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

8. 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

9. 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

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

11. IPTV & programming iTV applications
Dr. Vassilis Tsetsos ;

12. 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

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

14. 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)

15. 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)

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