1. Utilization of Digital Television Technologies for E-learning LADL Conference 1st LOGOS Open Workshop 20 September 2007 Budapest Dr. Sándor Bozóki, András Gnandt, György Sogrik Antenna Hungária Corp.

2. LADL 2007 Utilization of Digital Television Technologies for E-learning E-learning infrastructure based on digital television networks planned in the framework of the LOGOS project

3. LADL 2007 Utilization of Digital Television Technologies for E-learning DVB Data Broadcast Configuration - enables delivery of e-learning material as files and packages

4. LADL 2007 Utilization of Digital Television Technologies for E-learning MHP based interactive television MHP is an open standard API, standards for interactive television. MHP works across all DVB transmission technologies (DVB-S, DVB-T, DVB-C, IPTV). MHP has a core based around a Java virtual machine – DVB-J. The innovation will result in MHP applications which run as fast as native ones. MHP-based iTV technology enables e- learning applications accesible for all digital TV subscribers

5. LADL 2007 Utilization of Digital Television Technologies for E-learning MHP API Resources are provided to MHP transparently Portability: no direct addressing of resources, System software provides an abstract view Application Manager manages the lifecycle of applications API is the interface between applications and System software

6. LADL 2007 Utilization of Digital Television Technologies for E-learning MHP versions MHP 1.0: Broadcast applications; Data via IP; Satellite, Cable and Terrestrial support (commercially introduced) MHP 1.1: Applications via IP; Smartcard support; VOD support; DVB-HTML support (commercially introduced e.g. in Austria) MHP 1.2: DVB-IPTV profile; non-DVB IPTV profile (commercially not available yet) The latest versions allow for more sophisticated e-learning applications

7. LADL 2007 Utilization of Digital Television Technologies for E-learning MHP profiles Enhanced Broadcast Profile –local interactivity, using remote control to interact with broadcast applications –No return channel Interactive Broadcast Profile –IP over the return channel – TCP, UDP –DNS forward resolving protocols Internet Access profile –HTTP 1.0 with persistent connection support and not using Keep-Alive when talking with proxies that doesn’t understand Connection –HTTPS IPTV Profile –RTSP –IP Service discovery (checks the signalling of services, no request to do this more frequently than once per day) The Internet access through television enables web-like e-learning experience (but, of course, the processing and presentation capabilities are still lower than in case of PC’s)

8. LADL 2007 Utilization of Digital Television Technologies for E-learning MHP profiles considered for e-learning Enhanced Broadcast ProfileInteractive Profile Standalone learningAvailable, however only according to the broadcast schedule Course limitations: *Mainly movie *Some text and pictures, at the same time with the broadcast *Self-checking (test with Java) Records cannot be created about the students’ test results Self-educated learning Available, however only according to the broadcast schedule Course limitations: *Mainly movie *Some text and pictures, at the same time with the broadcast *Self-checking with interactive test Records can be created about the students based on their test results (can help enhancing the course) Self-educated learning Collaborative learning (Instructor-led, facilitated, etc.) Not available with pure MHP, because there is no communication among the students, nor with the facilitator. Not available with pure MHP, because there is no communication among the students. Communication with the facilitator is possible through the return channel.

9. LADL 2007 Utilization of Digital Television Technologies for E-learning MHP in broadcasting services Typical applications: –EPG –Information services (superteletext, running banners) –Applications synchronized to the TV programs, like voting, games, (questioning tests for LOGOS) etc. –Electronic commerce and secure transactions The methodology of the development and the basic components of the above applications can be reused for iTV-based e-learning applications

10. LADL 2007 Utilization of Digital Television Technologies for E-learning MHP based interactive television head-end system which can serve the delivery of e-learning applications

11. LADL 2007 Utilization of Digital Television Technologies for E-learning MHP content formats essential for e-learning Picture formats: –JPEG –GIF –PNG –MPEG-2 I-frame Text formats: –Monomedia text with UTF-8 character encoding –DVB-HTML - optional

12. LADL 2007 Utilization of Digital Television Technologies for E-learning MHP capabilities for e-learning Dynamic HTML pages using scripts and return channel Interactivity with defining actions for the remote control Sending back information via return channel

13. LADL 2007 Utilization of Digital Television Technologies for E-learning Return channel technologies PSTN/ISDN, ADSL, GSM, GPRS – most common return channels for DVB services. DVB-RCT (Return Channel Terrestrial) – due to lack of frequency, it is not available on the market. DVB-RCS (Return Channel Satellite) – terminals capable of two-way satellite communication are still rather expensive.

14. LADL 2007 Utilization of Digital Television Technologies for E-learning IPTV infrastructure for e-learning

15. LADL 2007 Utilization of Digital Television Technologies for E-learning Set-top-box capabilities System Content formats and services supported by the set-top-boxes and handsets on the market VideoAudioInteractive applicationSupported services (AV decoding, presentation, VOD, PVR storage) DVB-TMPEG-2/H.264MPEG-1 Layer 2/AC-3 MHPAV decoding, NVOD (Near Video On Demand), PPV, EPG, STXT (SuperTeleteXT), voting, chat, shopping, banking DVB-SMPEG-2/H.264MPEG-1 Layer 2/AC-3 MHP DVB-CMPEG-2/H.264MPEG-1 Layer 2/AC-3 MHP DVB-HH.264AAC/AAC+/eAACHTML (HyperText Markup Language) AV decoding, PPV (Pay Per View), NVOD IPTVMPEG- 2/H.264/WMT9 MPEG-1 Layer-2/MPEG-1 Layer-3 (MP3)/AC-3 ANT Fresco (sometimes Espial, Opera and Internet Explorer 6) offering HTML 4 and JavaScript. A/V decoding, NVOD, PPV, EPG, TSTV (Time Shifted Television), STXT, voting, chat, shopping, banking, VOD

16. LADL 2007 Utilization of Digital Television Technologies for E-learning Conclusions We have designed and integrated a DTV content delivery platform in the framework of the LOGOS project. The limitations of DTV comparable to PC must be taken into account when developing e-learning applications. Content distribution via broadcast to many users is more cost-effective than via telecommunication channels. Content delivery platform should be assessed with real t-learning content during the tests planned for the next phase of the LOGOS project.

17. LADL 2007 Utilization of Digital Television Technologies for E-learning Thank you for your kind attention! András Gnandt Antenna Hungaria Co. http://www.ahrt.hu gnandta@ahrt.hu