GIGAMEDIA, co-operative postproduction in film and TV

1. GIGAMEDIA, co-operative postproduction in film and TV Terena Networking Conference 2001 Markus Berg, Dipl.-Ing. Institut für Rundfunktechnik GmbH

2. Agenda • Introduction • Why ATM? • Tests and experiences with ATM networks for broadcast/production applications • GIGAMEDIA applications • Conclusions

3. Acknowledgement The GIGAMEDIA project has been partially funded by the German Federal Ministry of Education and Research under contract No. TK602-NT109.2.

4. Project partners • Das Werk - Munich • GMD, Forschungszentrum Informationstechnik (FOKUS) - Berlin • Heinrich-Hertz-Institut - Berlin • IRT, Institut für Rundfunktechnik GmbH - Munich

5. Overview • The goal of the project is to examine applications and network structures for co-operative postproduction of TV and film in the Gigabit testbed infrastructure of the DFN (Deutsches Forschungs-Netz). • Applications and network infrastructure to enhance multimedia services over the DFN Gigabit testbed (GTB) are realised and used for the distributed production environment of the project partners.

6. ATM Network Connectivity

7. Why ATM?

8. Requirements for TV/film production networks • extremely low jitter/wander • low latency • no transmission interruptions • extremely low bit error and cell loss ratio • point-to-point and point-to-multipoint connections • easy management for the complete production network including adapters • high speed file transfer between video/audio servers • high availability

9. ATM • ATM guarantees the negotiated bandwidth by establishing and confirming connections with the wanted attributes • ATM keeps jitter in tight and predictable limits • ATM provides low latency for the transport • ATM will be used as backbone technology for critical broadcast and production applications  best solution for the QoS needed for distributed production

10. IP • originally IP was a “best-effort” service for robust transfer of data packets from source to destination • overprovisioning of bandwidth (“throw with bandwidth on it ”) does not really help if multimedia content will be handled at large scale • meanwhile some additional protocols are developed or under discussion like RSVP, Diffserv, etc. enabling the definition and signalling of service classes (CoS) • MPLS, a new approach for traffic engineering does not guarantee QoS • IP streams may be given priority in concurrence with others, but there is again the problem of missing bandwidth in the same priority class the IP QoS problem is not yet solved for critical broadcast/production streaming applications

11. Transmission of uncompressed digital video over ATM • loss less (transparent) transmission of a digital video stream (270 Mbit/s, highest quality) • low latency (<300 µs), no video/audio compression • applications: • distributed production • near delay free interviews • high quality telemedicine • telerobotic

12. SDI over ATM

13. Tests and experiences with ATM networks for broadcast/production applications

14. SYSTEMS 2000 • multi service network platform for broadcast applications • dark fibre Wide Area Connection between IRT (Munich-Freimann) and the fair (Munich-Riem) • WDM using 3 wavelengths, 2x ATM STM-4, 1x ATM STM-1 • demonstration of different broadcast applications: • transmission of an uncompressed digital video stream (270 Mbit/s) „SDI over ATM“ including Live-Interviews and video inputs from IRT‘s TV studio

15. SYSTEMS 2000 • distribution and contribution of TV programmes (MPEG-2 4:2:2) over the same ATM link with guaranteed Quality of Service • high speed file transfer with the ATP protocol (native ATM-application) with bit rates > 160 Mbit/s • ATM-encryption • storage Area Network (SAN), server connection via ATM-WAN using Fibre Channel and/or SCSI • video- and audio streaming (Windows Media Encoder and Real Encoder) • remote management of the IRT ATM network from the fair

16. SYSTEMS 2000

17. SYSTEMS 2000

18. IBC 2000 • ATM-Wide Area Network (WAN) (622 Mbit/s) between Munich (IRT) and the IBC booth in Amsterdam • demonstration of distributed production, post-production as well as distribution and contribution of TV programmes on a single network infrastructure • applications similar to SYSTEMS 2000

19. IBC 2000

20. ATM over EUROVISION • included LAN and WAN networks (combination of terrestrial SDH and the EUROVISION satellite network of the EBU) using ATM • unidirectional distribution of TV programmes (34 Mbit/s ATM) • multiplexing of several TV programmes into one ATM connection • video/audio file transfer on a bi-directional E1 (ATM) with high round-trip delays (about 0.5 sec) • ATM and codec management on bi-directional E1 (ATM)

21. ATM over EUROVISION

22. Results • Easy set-up of the ATM connection (management system located at IRT) • The full functionality of the ATM based transmission of multiplexed TV programmes via MPEG 4:2:2 codecs with direct ATM interfacing and on a unidirectional E3 satellite link in combination with WAN and LAN networks was demonstrated and proofed. • The fast file transfer together with the ATM management on a bi-directional E1 connection on combined LAN, WAN and satellite links and codecs was demonstrated and proofed (even with round-trip delays exceeding 0.5 seconds, both the interworking of the file servers and the management connections were save without any problems).

23. GIGAMEDIA applications

24. Example: Distributed production of commercials • production of commercials to be shown on plasma screens in super markets • production house cooperates with post production house to share resources • all partners including the client use the same network (GTB) • real-time video transmission between the two production partners (270 Mbit/s, SDI) over ATM • video file transfer (the produced clip) between video servers at every location • preview of the material by the client (MPEG-4, low bit rate) • video conference between the producers and the client during production

25. Production house (HHI) Post-production house (IRT) Client (GMD) GTB GTB Recorder Recorder ATM<-> SDI ATM<-> SDI remote video switch . Storage & distribution Off-line Form.-Conv. Post-production MPEG-4 RT- Encoder MPEG-4 RT-Decoder Control & video conference Control & video conference Control & video conference Video-Server Video-Server Video-Server

26. Production house (HHI) Post-production house (IRT) Client (GMD) Shoot film (TV) Store on recorder ATM<-> SDI Transmit video (SDI) & video conference ATM<-> SDI Receive video (SDI) & video conference GTB GTB GTB GTB GTB GTB GTB GTB Post-production of video Transmit video (SDI) & video conference ATM<-> SDI Receive video (SDI) & video conference ATM<-> SDI MPEG-4 RT-encode & streaming & view MPEG-4 reception, RT-decode & view MPEG-4 reception, RT-decode & view video conference (discussion of production) video conference (discussion of production) video conference (discussion of production) Off-line formats conversion File transfer File reception Transfer to storage media & distribution

27. Video server D5-Recorder IRT SDI SDI ATM ATM HHI GTB D1-Recorder SDI ATM das werk Distributed post processing

28. Video streaming and Remote Viewing

29. Video Server and Joint Viewing

30. Adaptive Streaming

31. Conclusions • distributed production of film/TV needs high speed networks with guaranteed QoS (ATM), • GIGAMEDIA has built up such an infrastructure including video conferences and preview of the produced material in MPEG-4 at low bit rates • the transmission of uncompressed digital video over ATM is the key application • GIGAMEDIA develops remote control for SDI equipment over the network

32. Conclusions (2) • today, ATM is the only technology that fulfils the rigid requirements of professional broadcast applications for production and post production • at this time, IP cannot provide solutions for critical broadcast real-time applications, but for some applications (low bit rate streaming, file transfer) IP is inevitable • adaptive streaming is a good (and cheap) alternative for reserved data transmission (non real-time)

33. Thank you! • This presentation was created with additional contributions from • H. Hofmann (IRT) • R. Schäfer (HHI) • J. Tiemann (GMD FOKUS)

34. Contact Markus Berg Institut für Rundfunktechnik GmbH Floriansmühlstr. 60 80939 München Tel.: +49 89 / 32399 – 279 E-Mail: berg@irt.de Fax: +49 89 / 32399 - 351 web: http://www.irt.de