Transcript QUTE`98 Workshop

MPEG-4 Approach to QoS
Reinhard Baier, GMD FOKUS, DT
Guido Franceschini, CSELT, IT
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
What’s MPEG-4?
• ISO/IEC 14496 - Information Technology Generic Coding of Audio-Visual Object
• 14496-1: Systems
• 14496-2: Visual
• 14496-3: Audio
• 14496-4: Conformance
• 14496-5: Reference Software
• 14496-6: DMIF
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
MPEG-4 - A scene
voice
AV presentation
video object
2D background
3D furniture
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
MPEG-4 - A scene description
scene
person
voice
2D background
video
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
furniture
globe
desk
audiovisual
presentation
What’s DMIF?
• Delivery Multimedia Information Framework
• DMIF is part 6 of MPEG-4
• DMIF specifies the Delivery Layer of MPEG-4
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
Why DMIF?
• too many delivery technologies, each with its
own peculiarities
• no consolidated solution for real time
multimedia streaming at certain QoS
• different APIs for different environments
(Local Files, Broadcast sources, Interactive
servers through a variety of transports)
• difficulties for network operators in defining
meaningful billing policies (e.g. the “flat”
Internet)
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
DMIF goals
• Favour the development of multimedia
application with QoS requirements
• Hide the delivery technology details to the
DMIF User
• Make optimal usage of network resources,
given application QoS constraints
• Allow Network Operators to monitor
resources being consumed in a single
session, to allow meaningful billing policies
• Ensure interoperability between end-systems
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
The DMIF approach
D M I F
The multimedia content delivery integration framework
The Broadcast Technology
The Interactive
Network Technology
Internet,
ATM,
etc.
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
Cable,
Satellite,
etc.
The Disk Technology
CD,
DVD,
etc.
The generic MPEG-4 architecture
media related
Compression Layer
ESI
Systems Layer
DAI
delivery related
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
Delivery Layer
DMIF communication architecture (1)
Broadcast
source
Local
Local
Storage
App
Network
DAI
Remote
App
DAI
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
DMIF communication architecture (2)
DMIF Filter
Local DMIF
for Broadcast
Local
App
DAI
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
Remote
DMIF
(emulated)
Remote App.
(emulated)
Broadcast
source
DMIF Filter
DMIF communication architecture (3)
Local
App
Local DMIF
for Local
Files
DAI
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
Remote
DMIF
(emulated)
Remote App.
(emulated)
Local
Storage
DMIF Filter
DMIF communication architecture (4)
Local
App
Local DMIF
for Broadcast
Remote DMIF
(emulated)
Remote App.
(emulated)
Local DMIF
for Local Files
Remote DMIF
(emulated)
Remote App.
(emulated)
Local DMIF
for Remote srv
DAI
Sig
map
DNI
Remote
App
Remote DMIF
(Real)
DNI
Heidelberg, 14-15 October 1998
Local
Storage
Network
Sig
map
QUTE’98 Workshop
Broadcast
source
DAI
DMIF URLs
• Still under debate
• Requirements are:
– to represent the location of a Service
– to localize the Service on a variety of
delivery technologies, including local files,
MPEG-2 broadcast, IP and ATM networks
– to represent any kind of address
– to identify the control protocol to be used
(including Intelligent Networks ?)
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
QoS in DMIF
• QoS “media” metrics: used by the application
when requesting a channel
• QoS “transport” metrics: a generic network
centric translation of the above
• QoS “network” (specific) metrics: the final set
of metrics used in the native network
signaling
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
Advantages for Developers
• they may write the application just once; then,
by simply plugging in more DMIF instances
and by feeding the application with different
URLs, the application would run on other
delivery technologies.
• they can begin to invest in commercial
multimedia applications with the assurance
that their investment will not be made
obsolete by new delivery technologies.
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
Advantages for Network Operators
• the model allows for meaningful and flexible
billing policies in presence of QoS
• it also enables the effective exploitation of
Intelligent Networks, by plugging in an
appropriate and proprietary DMIF instance
QUTE’98 Workshop
Heidelberg, 14-15 October 1998
Conclusion
• The DMIF model would benefit many players
of the multimedia industry, and provides
solutions for yet unsolved issues like:
– meaningful billing policies
– permanence of multimedia application in
the presence of new delivery technologies
– QoS management.
QUTE’98 Workshop
Heidelberg, 14-15 October 1998