Multimedia Service System & DAVIC’s Approach

1. Multimedia Service System & DAVIC’s Approach 1998. 2. 13. Jae-Woo Yang ETRI

2. Contents • Trends • DAVIC specifications • DAVIC’s second step

3. Myths of Convergence • Telecommunications and broadcasting services • PC and TV

4. Technology visions But they underestimate long-term developments. Popular technology visions often overestimate near-term prospects... Impact of technology Time

5. a a a Technology costs less, content costs more Cost of media production Cost Bandwidth Data processing Data storage Time

6. Mass Media Percent Penetration of U.S. Households 100 90 Radio 80 VCR 70 60 Audio CD Players 50 Video-Game Consoles 40 Cable Online Households Television Telephone 30 CD-ROMs 20 Digital DBS Television 10 1935 1945 1955 1965 1975 1985 1995 2005

7. NEWSPAPERS ON THE WWW • Advantages • no delays due to printing & distribution • possible to update contents • hot links to related information on other sites • immediate access to searchable archives • Disadvantages • expensive technology barrier • downloading delays • awkward to use & not really portable • dependent on client “pulling” content

8. BROADCASTING • Advantages • ease of use • immediacy • low cost per user • Disadvantages • linear • ephemeral • no interactivity • no way to filter content to suit individual needs

9. DIGITAL BROADCASTING Digital broadcasting permits: • broadcasting of multimedia services • text (e.g. super-teletext based on HTML pages) • still pictures • data broadcasting • real-time information, software • Many broadcasters are attracted by these opportunities, either to offer programme-related services or to offer commercial services

10. DIGITAL AUDIO BROADCASTING (DAB) • The data capacity of a DAB channel is 1.2 Mbit/s, but <10% will be available for non-audio services • A 64 kbit/s channel can deliver: • 28.8 MB in 1 hour • 1 MB in 2 minutes • A 28.8 kbit/s modem used to access Internet services usually delivers far less than 28.8 kbit/s • Data services delivered via DAB will achieve continuous throughput at the nominal data rate (I.e. 64 kbit/s = 64 kbit/s)

11. PUSH SERVICES ON INTERNET • “Push” services delivered over the Internet, such as Pointcast, allow users to specify their interests: • news items about specific subjects • share prices for a particular company • a football team • weather in certain cities • The user’s computer periodically checks if any relevant new information is available, and downloads it for display

12. PUSH TECHNOLOGY Essential elements of push technology • Content delivered without user intervention • Content filtering defined by client Push technology is not new • news agencies have supplied customised news for years using teleprinters Users will be attracted by high quality content • established media brands, such as newspapers and broadcasters

13. PUSH = BROADCASTING? “Push” technology is: • similar to broadcasting in that many users receive the same information simultaneously • different to broadcasting in that users only receive their “narrowcast” information • Works best with “persistent” connections to the Internet, rather than dial-up connections • Storage at the receiving terminal is essential

14. HARD DRIVES Factor of 2 every 18 months Factor of 2 every 10 months

15. DAB & PUSH TECHNOLOGY • DAB offers a persistent connection at 64 kbit/s • DAB + push technology = “a wireless newspaper” • always the latest edition • up-dated continuously • tailored to your needs • DAB cards in lap-top PCs could enable “a wireless newspaper on the move”

16. PC vs. TV VOD (IMM) They may not always share the same tool. High-Quality, Realtime Market Area 1 Local storage based VOD Digital TV QOS-guaranteed streamed-AV service over IP SVB future IDB EDB Richness of media Local storage based VOD Home Network not fully compatible Now High-Speed Data Services Internet Access Notation Italic font : possible new work items. Best-effort video over the Internet Moderate-Quality, Non-Realtime Home PC Market Area 2 Shared-Service. Non-Interactive Personal-Service, Interactive Flexibility/Interactivity

17. DAVIC is • Int’l organization to specify global common specs related to: • Digital AV Services • Systems and components to provide required functions

18. Organization

19. Structure • GA, BD, MC, TC • Geographical balance • Asia, Europe, America • Industrial balance • Telecom, Consumer, Computer, Broadcasting

20. What DAVIC has done? • End-to-end solution for VoD system a.k.a. remote VCR. • Enhanced broadcast system is adopted in Europe. • Provides Cable modem, MMDS, LMDS specs. • DAVIC specs to be ISO/IEC standards. • Solves some of conflicting global standards such as AAL1 vs. 5, MPEG-2 vs. Dolby.

21. What happened to VoD service? • Model is built and tested. • S1, S2, S3, S4, S5 • Inter-operability test was carried out. • Current product • USA: A0 interface - Bell South/Zenith/Divicom • Philips: Enhanced Broadcast • Korea: Interop test & trial

22. Why they have chosen DAVIC? • Don’t want to be bound to the proprietary solutions

24. Control/ Signaling A/V and associated data Channel User data Access Application Control Application JPEG Control data Presentation MPEG MPEG2 Decoder / User data Audio Decoder Video Decoder etc. Client- Network Signal Video_PES data_PES Audio_PES Session DSM-CC packet packet packet PES packet Transport Stream Transport MPEG 2 Systems Network Specific (jitter removal etc.) UNI Network Network Signaling Specific Network Network Specific Specific Data link Network Specific (SAAL, (AAL5, (AAL 1, AAL 5, etc.) LAPD etc.) X.25 etc.) Network Specific Physical (ATM, QPSK, QAM, VSB etc.) and from top to bottom...

25. System Reference Model

26. Service Consumer Model (STB)

27. DAVIC - A complete system ATM Forum MPEG ETSI DSM-CC VESA DVB ANSI IMA ODA IETF ISO/IEC MHEG DVB OMG OMF W3C ITU NMF

28. Monterey Meeting Summary • 1.3 published. • CFP11 is issued

29. Vision - what is expected as a new set of specs?

30. What is DAVIC’s role for IP-based system solution? • System solution • IETF concerns only upper layers • DAVIC has inter-industry members which is essential for developing emerging Multimedia system

31. DAVIC CFP 11 • A complete end to end system specification for • Digital Audio Visual broadcast over IP-based networks • Delivery of Interactive Multimedia over IP-based networks • Interactive Multimedia services based on local storage

32. and • Integration of DAVIC defined content and Internet content • Integration of communicative services, real-time packetised audio and speech with IP in an DAVIC environment • Integration of access network content distribution in an DAVIC environment • Content Contribution Networks

33. Invite proposals are from • content creators, packagers, programmers, server manufacturers, delivery media and service organisations, terminal device manufacturers, software vendors, integrators, governmental and regulatory organisations, standards bodies, research and academic organisations, industry consortia and any individual or organisation • whose interest covers the topic of integrating Internet Protocol (IP) domain technologies into an end-to-end system, particularly in the audio-visual domain.

34. Proponents • Proponents need not be members of DAVIC and their proposal may be derived from other domains where IP domain technologies are of key importance. • Proponents may attend the Milan meeting and make a presentation of their proposal.

35. Digital A/V Broadcast over IP-based networks • IP-based systems are an important new mechanism for delivering digital broadcast A/V information. • This and other innovative systems could support continuous public TV/radio (“TV anywhere”), personal broadcasting or electronic program/service guides.

36. Delivery of Interactive Multimedia over IP • Two-way IP based transport systems support interactive multimedia applications such as access to Internet services, VoD, tele-shopping, information and entertainment services, multi-party communicative services and gaming. • Comprehensive specifications integrating end-to-end interactive multimedia IP-based systems have not yet been developed.

37. Interactive Multimedia Services Based on In-home Storage • The cost of storage media, such as RAM and hard disk, is rapidly decreasing (e.g., for hard disks the cost/bit is halving every twelve months). Replaceable and recordable digital media such DVD and DVHS are also becoming available. • Local storage in the home can ease delivery bandwidth limitations and latency constraints.

38. Interactive Multimedia Services Based on In-home Storage (II) • Examples of applications that may benefit from home storage include • VOD • multicast VOD • personalised news services • software distribution • targeted advertising • This presents exciting opportunities for new A/V and multimedia services.

39. Integration of DAVIC and Internet Content • The Internet URL provides a mechanism to link content at different locations. An analogous mechanism could provide linkages to content with a temporal property. Such links may be valid only for a specific time interval. This mechanism would offer a new ability to relate digital A/V content, and to relate Internet and DAVIC content.

40. Integration of DAVIC and Internet Content (II) • Examples of such links may be advertising links from TV programs to related web pages, program trailers (a TV program pointing to a future program), and web pages referencing TV content. • DAVIC is requesting proposals for technologies to provide and manage such reference and linking capabilities.

41. Speech and Audio Services over IP • Universally accessible and interoperable speech and audio services using IP will provide major improvements in person to person communication. Therefore, DAVIC seeks IP compatible interoperable tools for speech and audio to provide peer to peer communication services. • DAVIC also seeks to develop comprehensive specifications integrating end-to-end IP-based systems.

42. Content Distribution From the Home • One of the features of the Internet is the ability of an individual user to make available, or publish, non-commercial and original audio-visual and data content to other users. This capability would greatly facilitate intra-family and small group communications. • DAVIC is requesting proposals to integrate an equivalent capability into the DAVIC specification.

43. Content Contribution Network Systems • DAVIC requests contributions for technologies to support an end-to-end system for the wide area distribution of content from a source server to other remote servers. The systems are considered for both realtime (streaming-type) and non-realtime (store-and-forward-type) content transfer.

44. Related topics • User and Market Requirements • End to End Application Requirements • Physical Layer Technologies • End-to-End Network and End User Signalling Protocols • System Management Protocols and Integration • Digital Media and Application Environment Specifications • End-to-End Security Technologies

45. Conclusions - actions to be taken • Digital Broadcast • IMM systems • IPRs • System solutions • Pre and post meetings • exchange system knowledge • joint development of specs • Joint experiments