GIGAMEDIA, co-operative postproduction in film and TV

© IRT/NNM Markus Berg 16 May 01

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GIGAMEDIA, co-operative postproduction in film and TV

Terena Networking Conference 2001

Markus Berg, Dipl.-Ing.

Institut für Rundfunktechnik GmbH


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Agenda

• Introduction

• Why ATM?

• Tests and experiences with ATM networks for broadcast/production applications

• GIGAMEDIA applications

• Conclusions


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Acknowledgement

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


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Project partners

• Das Werk - Munich

• GMD, Forschungszentrum Informationstechnik (FOKUS) - Berlin

• Heinrich-Hertz-Institut - Berlin

• IRT, Institut für Rundfunktechnik GmbH - Munich


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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.


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ATM Network Connectivity

GTB Berlin - München

BRAIN Berlin

EANTC

MNet München

LRZ

HHI

GMD FOKUS

Das Werk

IRT

MM

SM

Adlershof

SM


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Why ATM?


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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


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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


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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


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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


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SDI over ATM


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Tests and experiences with ATM networks for

broadcast/production applications


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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


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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


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SYSTEMS 2000

Multiservice Broadband Networks for Broadcasters

270 Mbit/s

UniversityErlangen

MPEG 240 Mbit/s

SDIATM

Adapter

SDIATM

Adapter

Hospitals

Movie/TVProduction

MunichCitynet

MPEG 240 Mbit/s

German Research Network

DFN

MPEG 240 Mbit/s

MPEG 240 Mbit/s

TechnicalUniversityMunich

40 Mbit/s

SDIATM

Adapter

SDIATM

Adapter Campus Freimann

CampusUni-TV

StudioIRT

Institut für Rundfunktechnik


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SYSTEMS 2000


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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


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IBC 2000


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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)


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ATM over EUROVISION

D1

D5

IRT

ARD STERNFFM

EUROVISION NET

EBUGENEVA

MPEG 4:2:2Coder

ATMTestsystem

ATM Switch

ATM Switch

MOD/DEM(34 Mbit/s)

MOD/DEM(34 Mbit/s)

ATM Switch

MPEG 4:2:2

V A

V A

STM-1

STM-1 STM-1

34 Mbit/s

34 Mbit/s

STM-1

Provider Layer

Broadcaster Layer

ATM Layer

FFM

FileServer

STM-1 STM-1

SMA SMA

MOD/DEM(2 Mbit/s)

MOD/DEM(2 Mbit/s)

2 Mbit/s

2 Mbit/s

ATMTestsystem

FileServer

STM-1 STM-1


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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).


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GIGAMEDIA applications


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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


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Production house

(HHI)

Client

(GMD)

Post-production house

(IRT)

Recorder

ATM<-> SDI ATM<-> SDI GTBGTB

Recorder

Post-production

Video-Server Video-ServerVideo-Server

Off-lineForm.-Conv.

.

MPEG-4 RT-Decoder

Storage & distribution

Control & video conferenceControl & video conferenceControl & video conference

MPEG-4 RT-Encoder

remotevideo switch


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Production house

(HHI)

Client

(GMD)

Post-production house

(IRT)Shoot film (TV)

Store on recorder

GTBATM<-> SDI Transmit video (SDI)

& video conference

ATM<-> SDI Receive video (SDI)& video conference

Post-production of video

GTB GTBMPEG-4 RT-encode & streaming & view

MPEG-4 reception,RT-decode &view

Off-line formats conversion

GTBATM<-> SDI Receive video (SDI)

& video conference

ATM<-> SDI Transmit video (SDI)& video conference

video conference (discussion of production)

video conference (discussion of production)

GTB GTBFile transfer File reception

Transfer to storage media & distribution

GTB GTBvideo conference (discussion of production)

MPEG-4 reception,RT-decode &view


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Distributed post processing

GTB

HHI

SDI

ATM

D5-Recorder

SDI

ATM

IRT

das werk

D1-Recorder

SDI

ATM

Video server


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Video streaming and Remote Viewing

GTB Video Server,

GMD Video Client,

HHI

Video Client, IRT


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Video Server and Joint Viewing

GTB Video Server,

GMD

Video Client, GMD

Video Client, HHI

Control

Videoconference


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Adaptive Streaming

reserved

elastic

hybrid

hybrid adaptive


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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


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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)


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Thank you!

• This presentation was created with additional contributions from

– H. Hofmann (IRT)– R. Schäfer (HHI)– J. Tiemann (GMD FOKUS)


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Contact

Markus Berg

Institut für Rundfunktechnik GmbH

Floriansmühlstr. 60

80939 München

Tel.: +49 89 / 32399 – 279 E-Mail: [email protected]

Fax: +49 89 / 32399 - 351 web: http://www.irt.de

GIGAMEDIA, co-operative postproduction in film and TV

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