Transcript Multimedia services: from narrowband to - ITU

Multimedia Services
from Narrowband to Broadband
Simão Ferraz de Campos Neto
Counsellor – ITU-T Study Group 16
Multimedia Services, Systems and Terminals
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Contents
o About ITU-T SG 16
o Multimedia services
o Summaries: access & media components
o Narrowband services
o Broadband services
Additional slides
o MediaCom 2004 Project
o Media Coding
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
About Study Group 16
ITU-T
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
ITU-T Study Group 16
(www.itu.int/ITU-T/studygroups/com16)
Responsible for studies relating to:
o multimedia service definition and
multimedia systems, including the
associated terminals, modems,
protocols and signal processing.
Lead Study Group on
o Multimedia Services, Systems and
Terminals
o e-business and e-commerce
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
ITU-T Study Group 16 Structure
ITU-TSB
Counsellor
Simão Ferraz de
Campos Neto
Working Party 1
Modems and
Facsimile Terminals
Mitsuji Matsumoto
Study Group 16
Multimedia Services Systems & Terminals
Pierre-André Probst
Working Party 2
Multimedia
Platforms and
Interworking
Sakae Okubo
Working Party 3
Media Coding
John Magill
Working Party 4
Multimedia
Framework
John Magill (acting)
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Multimedia Services…
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Development of MM Applications & Services
Users
Recommendations
for Applications &
Services (F,T series)
Interoperability
Factors:
•Users needs
•Market Trend
•System Design
•Architecture
•Interoperable
Numbering,
Charging Specs.
(E-series)
Integration or
Assembling of
Multimedia Parts
Common Multimedia
Parts, e.g.,
Coding (G,H,T-series),
Security (X-series),
Directory (X-series)
(Terminal Design; J,H-Series)
Media (CS, PS, Cable)
Wired/Wireless
(ITU and non-ITU)
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Services in the Multimedia Context
o Two paradigms
• Telecommunications perspective
• Broadcasting perspective
o Telecoms perspective:
• Interactive applications, videoconferencing
o Broadcasting:
• Video delivery (e.g. commercial television)
o Convergence: IT / Telecoms / Broadcasting
• Interactive broadcasting
• Telecom service providers providing entertainment
services
ITU-T o Users view versus technologists view
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Where do we come from?
o Telephony service
• Voice (including audio-conferencing) 
• Extended services (call waiting, transfer, diversion,
hold, pickup, etc  SS7-based)
• Premium rate services
(“pay-as-you-go”  E.155)
o Voiceband data
• “Low” speed data (V-series: V.34, V.90, V.92)
• “Low” speed Internet access
• Fax (4.8 – 33.3 kbit/s)
• Low bit rate multimedia video-conferencing 
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Where to? Multimedia services
o Superset of monomedia services
o Coordinated delivery of more than one media:
• Audiovisual content (fallback to audio-only)
• Audiovisual plus whiteboard
• Delivery of video services
• Duo / triple play: voice / data / video
o Capabilities limited by access capacity BUT
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not all applications need all bandwidth available
o Taxonomy of media will help understand viability
of different types of aggregation to implement a
service
o Evolution: multimedia over narrowband channels
to broadband channels
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
How hungry an application?
Upstream Mbit/s
2
Internet access
&
Peer-to-peer
applications
Voice (PSTN)
1
0.5
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Video conferencing
Broadcast &
Interactive TV
e-commerce
0.5 1
2
4
26
Downstream (Mbit/s)
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MM Service Descriptions
Integration of media components from the user’s point-of-view
Service definition and requirements are available in the F-series.
F.700 contains the umbrella definitions:
o Definition of several MM tasks:
• Conferencing (multipoint, bi-directional, real-time)
• Conversation (point-to-point, bi-directional, real-time)
• Distribution (point-to-multipoint, unidirectional)
• Sending (point-to-point distribution, Tx controlled, UD; info
pushing)
• Receiving (point-to-point distribution, Rx controlled, UD; info
retrieval)
• Collecting (multipoint-to-point distrib., UD, Rx controlled; info
polling)
o Media components: audio, video, text, graphics, data
and still-pictures
ITU-T o Quality level for media components: {-1, 0, 1, 2, 3, 4}
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MM Service Descriptions (2)
F.70x: network-independent definitions
F.702 (F.MCV)-Multimedia conference services
F.703 (F.MCS)-MM conversational services
Network-specific definitions
F.731- N-ISDN MM conference services
F.732- B-ISDN MM conference services
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Access components:
a brief summary
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Access methods
o Copper:
• “Strict” PSTN (dial-up): the majority
• ADSL: up- and down-stream offerings vary
depending of the network provider & line
conditions. Standard limits on 1.5 Mbit/s
• ADSL+, ADSL2: recent improvements in the
techniques, higher bit rates
• VDSL: higher bit rates
o Fiber:
• Backbone (traditional)
• To the curb (dreamnewer developments)
o Wireless:
• Satellite, microwave
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• WiFi & extensions
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Most recent modem standards
o V.34, Two-wire PSTN modem for rates of up to
33.6 kbit/s; 1996-10
o V.90, PSTN modem with digital upstream up to
56 kbit/s and analogue downstream up to 33.6
kbit/s; 1998-09
o V.91, Four-wire version of V.90 allowing fully
digital up and downstream; 1999-05; 2001-07
o V.92, Enhancements to Recommendation V.90;
Geneva, 2000-11; 2001-07; 2002-03
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ITU-T Recommendations on DSL
o G.995.1 – Overview of Digital Subscriber Line
(DSL) Recommendations
o G.991.1 (HDSL) – High-bit rate Digital
Subscriber Line (HDSL) transmission system
on metallic local lines
o G.991.2 (G.SHDSL) – Single-pair High bit rate
speed Digital Subscriber Line
o G.993.1 (G.VDSL) – Very high bit-rate Digital
Subscriber Line
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o G.994.1, G.996.1 and G.997.1 for tests,
management and handshake
o ADSL  next slide
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ITU-T Recommendations on ADSL
o G.992.1 (G.DMT) – Asymmetrical Digital
Subscriber Line (ADSL) Transceivers
o G.992.2 (G.LITE) – Splitterless Asymmetrical
Digital Subscriber Line (ADSL) Transceivers
o G.992.3 – Asymmetric digital subscriber line
transceivers - 2 (ADSL2.DMT)
o G.992.4 – Splitterless asymmetric digital
subscriber line transceivers - 2 (ADSL2.LITE)
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Optical access standards (1)
Recs.
Bit rate
Content
Date
G.955
140 Mbit/s
Single channel
PDH
Long. Compat.
1984
G.957
STM-16
Single channel 1998
SDH
transv. Compat.
G.691
STM-4 up to
STM-256
Single channel 1994-2000
Transv compat.
Terminal OAs
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Optical access standards (2)
G.692
622 Mbit/s – 10 Gbit/s
(STM-4 to STM-16)
WDM 4 to 32 ch
Long. Compat.
Line amplifiers
mono/bidirect.
1996 / 1998
G.959.1
2.5 and 10 Gbit/s
Pre-OTN
Single /WDM
Transv Compat.
Term. OAs
Id Interfaces
2000
Up to 16 channels
WDM
G.693
10 – 40 Gbit/s
(STM-64 to STM-256)
Single channel
Transv. Compat.
Intra office
2001
G.694.1
G.694.2
≥ 80 Ch/10 Gbit/s
Up to 18 Ch/2.5 Gbit/s
Dense WDM
Coarse WDM
2002
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Media components
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Data
o T.120-T.140,T.17x provide definitions for
data exchange and control in MM
conferencing applications. For example:
• T.120 defines data protocols for multipoint
multimedia conferencing (Annex C
describes a light version of T.120). E.g.
White-board applications.
• T.140 adds text conversation (“chat” e.g.
for hearing-impaired people)
• T.17x: MHEG for information retrieval
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Media Coding
Four aspects:
o Audio
o Video
o Still-image
o Other media coding
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Media Coding: Audio
o Three “classic” quality tiers: audio,
wideband speech, and telephony speech.
o ITU-T focus on interactive
communications, hence mainly produced
wideband and telephony speech
compression standards (F.700’s A0 and
A1 Quality Levels).
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Media Coding: A2/A3 Audio
o A2 coding for broadcast applications J.41
(logarithmic PCM compression, 15kHz, 384kb/s)
1988
o A2&A3 Audio coding: ISO MPEG
• MPEG2/Audio (e.g. MP3)
• MPEG4/Audio
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Media Coding: A1 Audio
A1: Wideband speech coders (50-7000Hz)
o J.42 11-bit logarithmic PCM compression
(192 kbit/s) 1988
o G.722 Split-band ADPCM Coding of 7 kHz
speech (64,56&48 kbit/s) 1988
o G.722.1 Transform coding (32&24 kbit/s) 1999
o G.722.2 Coding of 7 kHz speech at around 16
kbit/s (5.5-24 kbit/s) 2002
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Media Coding: A0 Audio
A0: Telephony speech coders (300-3400 Hz)
o G.711 PCM coding (64 kbit/s) late 60’s
o G.726 ADPCM coding (32; 40, 24 & 16 kbit/s) 1988
o G.727 Embedded ADPCM coding (40-16 kbit/s) 1990
o G.728 LD-CELP coding (16; 40, 11.8 &9.6 kbit/s) 1992
o G.723.1 Dual-rate coding (5.3 & 6.3 kbit/s) 1995
o G.729 CS-ACELP coding (8; 12.8 & 6.4 kbit/s) 1996-98
o G.VBR Variable bitrate speech coding
New!
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Media Coding: Video
o ITU standards:
• H.261  Video Codec for N-ISDN
• H.262 = MPEG2/Video (“Common text”)
• H.263 and Annexes  IP, wireless, and
N-ISDN
• H.264 (ex-H.26L): successor to H.263,
work being done teamed up with
Ongoing (JVT)
MPEG
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Comparison of H.264 to existing standards
(high bit rates broadcasting)
Quality
Y-PSNR [dB]
Tempete CIF 30Hz
38
37
36
35
34
33
32
31
30
29
28
27
26
25
JVT/H.26L
MPEG-4
MPEG-2
H.263
0
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500
1000
1500
2000
2500
3000
3500
Bit-rate [kbit/s]
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Media Coding: Still Image
o Still image (B/W & color) is used in
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facsimile services, in Internet applications,
digital photography, etc.
o Standards work performed by a
“Collaborative ITU|ISO/IEC Team”
working under ISO/IEC SC29 rules and
organization
o ITU has “common-text” for JPEG/JBIG
(T.80 series); soon-to-be JPEG2000
(T.800 series)
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Other media coding
Currently not performed in ITU-T:
o Character coding (ISO/IEC SC2 activity)
o Speech synthesis (text-to-speech)
o Speech recognition (new developments)
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Narrowband multimedia services
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Multimedia terminals & systems
Integration of media components from the equipment/protocol point-of-view
o H.324: Communications using circuit-switched
services (fixed and mobile, including 3GPP) 
o H.320: Communications over N-ISDN 
o H.310: Communications over B-ISDN 
o H.323: Communications over packet networks
(mainly IP, mainly voice) 
ITU-T
SG16
• H.450.x: Supplementary services for H.323 systems
• H.246: Multimedia Terminal Interworking
• H.248[.x]: Interworking between H.323 packet-based
networks and the PSTN
• H.235: Security for H.323 systems
• …
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
PSTN multimedia terminals
Functional model for H.324 Terminal
Audio Coding (e.g. G.723.1)
Video Coding (e.g. H.261, H.263)
User
Interface
Data Coding (T.120; V.14, LAPM)
MM Mux & Sync
(Fixed network: H.223;
Mobile: H.223 Annexes A-D)
Network
Interface
System Control (H.245,SRP/LAPM)
Call Control (National standards; V.250)
•
•
Will not scale towards bandwidth-hungry applications due
to basic limitation of the network capacity
Conferencing-centric
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
ISDN multimedia terminals
Functional model for H.320 N-ISDN Terminal
Audio Coding (G.711)
Video Coding (H.261)
User
Interface
Data Coding (T.120)
MM Mux &
Sync
(H.221)
Network
Interface
System Control (H.242)
Call Control (Q.931)
•
•
Will not economically scale towards bandwidth-hungry
applications
Conferencing-centric
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Packet-based multimedia terminals
Functional model for H.323 Terminal
Audio Coding (e.g. G.711, G.729)
Video Coding (e.g. H.261, H.263)
User
Interface
User Data Coding (T.120)
MM Mux &
Sync
(H.225.0)
Network
Interface
System Control (H.245)
Call Control (H.225.0, Q.931)
•
•
Scales well towards bandwidth-hungry applications,
depending on capacity of the underlying networks
Conferencing-centric
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Interoperability amongst MM terminals
H.324
H.310
User data
User data
Audio/Video
Audio/Video
Call Control
(H.245)
Mobile
Fixed
H.223
H.223
Anx.A-D
H.225.0
RTP/
Non-QoS
QoS
User data
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Call Control
(H.245)
H.221
User data
Audio/Video
Audio/Video
H.323
Mux
H.222.0
H.222.1
Call Control
(H.242/H.243)
Call Control
(H.245)
H.320
Scope
for H.246
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Broadband multimedia services
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Two broadband perspectives
o Convergence from broadcasting
perspective:
• IP Cablecom Architecture
o Convergence from telecom perspective
• Full-service VDSL Architecture
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Broadband MM over cable:
ITU-T Cablecom
o Project managed by ITU-T Study Group 9
o IP Cablecom refers to standards for IP cable
o
o
o
o
communications
IP Cablecom defines architecture and interface
specifications
It builds on J.83 / J.112 cable modem transport
Initial market driver IP Cablecom for has been IP
telephony
Flexibility for cable providers to offer new
services  market deregulations
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Sample applications for ITU-T Cablecom
o Residential/Business IP Telephony
o Voice over IP
o Video IP telephony
o Voice/data/video unified messaging
o Enhanced conferencing and media services
o Entertainment Services
• Real-time multiplayer interactive gaming
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
IP Cablecom architecture
AN
Call
Management
Servers
CM
HFC
PSTN
Gateway
Managed IP
Network
PSTN
MTA CM
Embedded MTA
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AN Access Node
CM Cable Modem
HFC Hybrid Fiber Coax Network
MTA Multimedia Terminal Adapter
PSTN Public Switched Tel. Network
Back Office
Servers
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
IP Cablecom Recommendations for
interoperability intra-zone and with PSTN
Architecture
J.160 Architecture
Signaling
J.162 Network Call Signaling
J.165 IPCablecom Signaling
J.171 Trunk Gateway Control
Protocol
Quality of Service
J.163 Dynamic QoS
Media/Codecs
J.161 Audio Codec Reqs.
Operating Support System
J.164 Event Messaging
J.166 MIB Framework
J.167 MTA Provisioning
J.168 MTA MIB
J.169 NCS MIB
Security
J.170 Security
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IPCablecom Recs. for interoperability
interzone and inter-domain directly over
managed IP backbones
Quality of Service
J.174 Inter-domain QoS
Security
J.170 Security
Signaling
For further study
Operating Support System
J.164 Event Messaging
Architecture
For further study
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Broadband MM over the local loop:
Full service VDSL specifications
o Work under the FS-VDSL Focus Group
o
o
o
o
o
(whose parent Study Group is SG 16)
Video-centric services using the local loop
Opportunity for network operators to compete with
Cable network providers
Not ITU-T Recommendations (yet)
Assumes high rate availability at customer’s
premises: combination of fiber & VDSL
Current architecture is ATM-based (PPPoA), IP
extensions foreseen (PPPoE)
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
FS-VDSL Architecture
Broadcast
TV
Voice
Services
(PSTN/ISDN)
Video on
Demand
Internet
Services
Digital Customer Premise
Distribution Network
User premises
VDSL
Multiplexing & Delivery over optical
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Digital
Broadcast
Network
Interactive
A/V
Network
Internet
Service
Provider
Local Loop
&
Transmission
Voice
Services
(IP, PSTN)
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Full Service VDSL Technical Specifications
o Focus Group Technical Specification
(http://www.itu.int/ITU-T/studygroups/com16/fs-vdsl)
•
•
•
•
Part 1: Operator requirements
Part 2: System Architecture
H.FSV
Part 3: Customer Premises Equipment
-Arch
Part 4: Physical Layer Specification for
Interoperable VDSL Systems
• Part 5: OAM&P aspects for FS-VDSL Services
H.FSV-OAMP
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Conclusions
o Network / infrastructure evolution will allow
introduction of richer services
o Convergence of services and applications from
IT, Telecom & Broadcasting industries
o Services that can be introduced are a function of
the bandwidth available: taxonomy of the
applications
o Evolution:
• monomedia, narrowband services to
• multimedia, narrowband to
• multimedia, broadband
ITU-T
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Thank you for your attention!
For further contact, please feel free to contact:
Simão Ferraz de Campos Neto
Counsellor, ITU-T Study Group 16
[email protected]
Tel: +41-22-730-6805
Fax: +41-22-730-4345
http://www.itu.int/ITU-T
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Additional
Slides
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004
An ITU-T Study Group 16 Project
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004 Context
Created in recognition of:
o the rapid growth in digital, wireless, and IP networks;
o the convergence of technologies e.g. broadcasting,
communications, information technology, etc.;
o that multimedia topics are addressed in many SDOs;
o the growth in multimedia services and applications;
o the need to study performance, interworking,
interfaces etc. for user satisfaction.
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004: Objectives
The objective of the MediaCom2004 Project in SG 16 is
to create a framework for the harmonized and
coordinated development of multimedia communication
standardization for use across all ITU-T and ITU-R
Study Groups, and in close cooperation with other
regional and international SDOs and industry forums.
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004: Goal
One of the main goals of the MediaCom2004
Project is to reduce need for higher layer
Gateway functionality
Telephony, FAX,
VPS/VCS, Webcasting,
Multimedia
CS Network
Mobile
Network
IP Network
Gateway
Gateway
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Diagram of Interactivity in an
Era of Convergence
ITU-R Study Group 6
PRODUCTION
- TELEPHONE
- PC
- BROADCASTING
DATABASE
- FILMS
- BANK
- ……
SERVER
SERVER 1
I
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R
A
C
T
I
V
E
SERVER 2
I
N
T
E
N R
O A
N C
T
I
V
E
USERS
NETWORKS
RX
TX
I
N
T
E
R
F
A
C
E
P
- FIBRE
- CABLE
- TERRESTRIAL N.
- SATELLITE N.
I
N
T
E
R
F
A
C
E
U
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RX
TX
...
RX
TX
MediaCom2004 - Timelines
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SG16
o Scope and plan drafted 1999/2000; approved at WTSA 2000
o Recent workshops
• IP Networking/MediaCom 2004 (Geneva, April 2001)
• MM in the 21st Century (Brazil, June 2001)
• MM Convergence (Geneva, March 2002)
• Security (Seoul/Korea, May 2002)
• IP/Optical (Chitose, July 2002)
• Satellites in IP & Multimedia (December 2002)
o Steering Committee meetings:
• 23 April 2001
• 14 March 2002
o Project updating:
• SG16 meeting, Brazil, May 2001
• SG16 meeting, Geneva, February & October 2002
o Next review:
• Other ITU-T Workshops (Emergency Telecoms, E-health)
• Next SG 16 meetings
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004 Interactions
Seeking to work with:
o Other ITU-T Study Groups
o ITU-R Study Groups
o IETF
o ISO/IEC
o Regional bodies, e.g. ETSI
o Industry & other bodies as required
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ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom2004 Work Strategy
ITU-T
SG16
o Seven Framework Study Areas (FSA)
• (A/16) Project MediaCom 2004
• (B/16) MM Architecture
• (C/16) MM Applications and Services
• (D/16) Interoperability of MM Systems and Services
• (E/16) Media Coding
• (F/16) QoS & E-to-E performance in MM Systems
• (G/16) Security of MM Systems and Services
• (H/16) Accessibility (total comm. concept)
• (I/16) Telecommunications for disaster relief
o MediaCom 2004 Steering Committee
o Aligned ‘Questions’ in Study Group 16
o Database of multimedia related standards
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004 Framework in SG16
MEDIACOM 2004 (Q.A/16)
Generic Questions B/16 to I/16
Framework Standardisation Areas (FSA)
Equipment and system questions
1/16 to 15/16
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004 Steering Committee (SC)
o High level committee: role of the SC is to
o
o
o
o
address coordination issues at high level and
determine issues to be coordinated by the
relevant technical groups.
A tool to help coordination across all SDOs
working on MM communication standards
Address multilateral issues
Co-operation through discussion to provide
customer oriented solution
Members: SGs ITU-T, SGs ITU-R, IETF,
MPEG, ETSI, W3C, ….
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004 – Continued activities
o Permanent review of the project (see SG16
page at itu.int/ITU-T/studygroups/com16)
o Coordination is in general performed at working
level
o Workshops represent an excellent opportunity
to improve the communications among the
different entities involved in the development of
MM standards
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004
Highlights from the first workshop
(IP-Networking and MediaCom 2004)
o Transition towards NGN
o E-Commerce/E-business
o MM service evolution
o Convergence/Interactive broadcast
o Service billing/accounting
o IP VPN
o MM mobility
o MM access platform
ITU-T
SG16
 for more details, please consult the final report of the WS
(SG 16 ITU-T website).
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004
Highlights from the second workshop
(MM Convergence)
o Service and network architecture
o Security and privacy
o MM quality of service
o Broadband delivery and in-home distribution
o Interactivity in Broadcasting
o Voice/video coding and signal processing
 for more details, please consult the final report of the WS
(SG 16 ITU-T website).
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
MediaCom 2004
Highlights from the third workshop:
(IP/Optical)
o NGN standardisation needed to support new services on a large
o
o
o
o
scale (new SG 13 Project)
Network operators and service providers expect high profit but
deployment may be slow on technical and regulatory grounds.
Open interfaces and interconnection are key, interop with legacy
systems needed for incumbents
New broadband services provision underway (Hikari)
IP-based MM communication is not yet well accepted for
broadcasting applications (connectionless model). Work needed
to overcome restrictions.
 for more details, please consult the final report of the WS
ITU-T
SG16
(SG 16 ITU-T website).
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Working Party 1
Modems and Facsimile Terminals
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities:
Modems and Facsimile (1)
o Accessibility (Q H/16):
• Text telephony (Rec V.18): extension to include text
telephony for mobile users
• Text telephony over IP
o PCM Modems (Q 11/16):
• New Rec V.150.1 (ex V.MoIP): procedures for the end-toend connection of V-series DCEs over IP-networks
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Modem-over-IP context
ITU-T
SG16
New Rec V.150.1: procedures for the end-to- end connection
of V-series DCEs over IP-networks
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities:
Modems and Facsimile (2)
o DCE-DCE protocols for PSTN and ISDN (Q 12/16):
• Amendments to Rec V.42
(possible consequences of V.150.1)
o DTE-DCE interface protocols (Q 13/16):
• Revision of Rec V.250
(possible consequences of V.150.1)
o Facsimile Terminals (G3 and G4) (Q 14/16):
• Revisions to several Recs of the T-series in support of
color fax & improved TIFF spec
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Some details on modem standards: V.34
o V.34, Two-wire PSTN modem for rates of up to 33.6 kbit/s;
1996-10
• 28800, 26400, 24000, 21600, 19200, 16800, 14400, 9600,
7200, 4800,
2400 bits/s
• Between 3429-2400 bit/s
• Synchronous, with the usual fallback:
V.34V.32bisV.32V.22bisV.22
• Uses other V-series recommendations for specific functions
such as V.8, V.8bis (startup), V.42 (error correction), etc.
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Some details on modem standards: V.90
o V.90, PSTN modem with digital upstream up to 56 kbit/s
and analogue downstream up to 33.6 kbit/s
ITU-T
SG16
• Full duplex operation on the PSTN with echo cancellation
• Downstream: PCM modulation at a symbol rate of 8000 and
synchronous channel data signalling rates from 28kbit/s to 56
kbit/s in discrete increments
• Upstream: (analogue) V.34 modulation; synchronous channel
data signalling rates from 4.8 kbit/s to 28.8 kbit/s with optional
support for 31.2 and 33.6 kbit/s
• Data signalling rates close to the maximum possible by use of
adaptive (training) techniques
• exchange of rate sequences during start-up to establish the
data signalling rate
• Modem start-up or selection: V.8 & V.8-bis (optionally)
• Fallback mode to full-duplex V.34V.32bisetc
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Some details on modem standards: V.92
o V.92, Enhancements to Recommendation V.90; Geneva,
2000-11; 2001-07; 2002-03
• Supports the V.90 features (see preceding slide)
• Similar to the downstream mode, negotiates V.34 modulation
upstream if a connection will not support PCM modulation
upstream
• Exchange of rate sequences during start-up to establish the
data signalling rate
• Reduced start-up time on recognized connections
• Support of modem-on-hold procedures in response to callwaiting events or outgoing call requests
• Fallback to V.90V.34etc
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Fax-related Recommendations
o T.4, Standardization of Group 3 facsimile terminals for
o
o
o
o
document transmission
T.35, Procedure for the allocation of ITU-T defined codes
for non-standard facilities
T.37, Procedures for the transfer of facsimile data via
store-and-forward on the Internet
T.38, Procedures for real-time Group 3 facsimile
communication over IP networks
Other support recommendations:
• T.42 (continuous tone), T.43 (grey scale & color coding in
fax), T.44 (mixed raster content), T.45 (run-length color
encoding)
• T.5 (testing method for G3 PSTN fax)
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Working Party 2
Multimedia Terminals and Systems
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Multimedia terminals & systems
Integration of media components from the equipment/protocol point-of-view
o H.320: Communications over N-ISDN
o H.310: Communications over B-ISDN
o H.323: Communications over packet networks
(mainly IP)
o H.324: Communications using circuit-switched
services (fixed and mobile, including 3GPP)
o H.246: Multimedia Terminal Interworking
o H.248[.x]: Interworking between H.323 packet-based
networks and the PSTN
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
ISDN multimedia terminals
Example: Functional model for H.320 N-ISDN Terminal
Audio Coding (G.711)
Video Coding (H.261)
User
Interface
Data Coding (T.120)
MM Mux &
Sync
(H.221)
Network
Interface
System Control (H.242)
Call Control (Q.931)
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Packet-based multimedia terminals
Example: Functional model for H.323 Terminal
Audio Coding (e.g. G.711, G.729)
Video Coding (e.g. H.261, H.263)
User
Interface
User Data Coding (T.120)
MM Mux &
Sync
(H.225.0)
Network
Interface
System Control (H.245)
Call Control (H.225.0, Q.931)
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
PSTN multimedia terminals
Example: Functional model for H.324 Terminal
Audio Coding (e.g. G.723.1)
Video Coding (e.g. H.261, H.263)
User
Interface
Data Coding (T.120; V.14, LAPM)
MM Mux & Sync
(Fixed network: H.223;
Mobile: H.223 Annexes A-D)
Network
Interface
System Control (H.245,SRP/LAPM)
Call Control (National standards; V.250)
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Interoperability amongst MM terminals
H.324
H.310
User data
User data
Audio/Video
Audio/Video
Call Control
(H.245)
Mobile
Fixed
H.223
H.223
Anx.A-D
H.225.0
RTP/
Non-QoS
QoS
User data
ITU-T
SG16
Call Control
(H.245)
H.221
User data
Audio/Video
Audio/Video
H.323
Mux
H.222.0
H.222.1
Call Control
(H.242/H.243)
Call Control
(H.245)
H.320
Scope
for H.246
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities: WP2 (1)
o Interoperability of MM systems and services (Q D/16):
• Roadmap for interoperability studies
o QoS and E-to-E performance in MM-Systems (Q F/16):
•
•
•
•
QoS Architecture (H.qos.arch)
MM QoS service classification (H.mmclass)
Call processing performance in MM systems (H.mmcp)
Controlling service priority (H.priority)
o Security of MM systems and services (Q G/16):
ITU-T
SG16
• Hybrid security profile to Rec H.235 on Security and
Encryption
• Mobile security (Rec H.510)
• Security for Emergency Telecommunications and
Disaster Relief (ETS)
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
H.235 - “H.323 Security”
Security Protocol Architecture
Multimedia Applications, User Interface
AV
Applications
Audio
Video
G.711
G.722
G.723.1
G.729
H.261
H.263
H.225.0
Terminal
to
Gatekeeper
Signaling
Encryption
RTP
Authentication
Data
Applications
Terminal Control and Management
(RAS)
RTCP
H.225.0
Call
Signaling
(Q.931)
Security
Capabilities
TLS/SSL
Unreliable Transport / UDP, IPX
H.245
System
Control
Security
Capabilities
T.124
T.125
TLS/SSL
Reliable Transport / TCP, SPX
Network Layer / IP / IPSec
T.123
Link Layer /......
Physical Layer / .....
ITU-T
SG16
Scope of H.323
Scope of H.235
Scope of T.120
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities: WP2 (2)
o MM-Systems, terminals and data conferencing (Q 1/16):
• Revision to Recs T.120, H.222.0, H.320, H.324
o MM over packet based networks (H.323 systems) (Q 2/16):
• Further development of H.323 (QoS, Internet protocols,
modem relay)
• Further development to H.460 (use of generic extensive
framework)
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities: WP2 (3)
o Infrastructure and interoperability for MM over packet based
networks (Q 3/16):
• Media gateway decomposition Rec. H.248.1: packages add
new functionality
o Video and data conf. using IP-supported services (Q 4/16):
• Integration of video and data, interoperability
o Mobility (Q 5/16):
• H.5xx series
• Mobility protocols and procedures
• Terminal mobility
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Working Party 3
Media Coding
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities:
Media coding
o Media coding (Q E/16):
• Media coding involves four aspects: Audio, Video, Stillimage & possibly other media coding (eg character coding)
• Umbrella question for Media Coding coordination
• Completion of JPEG T.800, T.801, T.803, T.804 (future work
done in ISO/IEC JPEG)
o Advanced video coding (Q 6/16):
• New generation of video coding standards for all
applications (Joint Video Team SG16/MPEG)
 ITU-T H.264 | MPEG4 Part 10 (Advanced Video Coding)
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities: WP3
JVT-Project (1)

New ITU-T Q.6/SG16 (VCEG - Video Coding Experts Group)
standardization activity for video compression

August 1999: 1st test model (TML-1)

December 2001: Formation of the Joint Video Team (JVT)
between VCEG and MPEG to finalize H.264 as a joint project:
JVT Coding (similar to MPEG-2/H.262)

February 2002: WD-2 (11 th test model: TML-11)

Schedule:
•
December 2002: Last major feature adoptions
•
February 2003: Final approval of H.264 “Advanced Video
Coding”
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities: WP3
JVT-Project (2)
 Simple syntax specification
• Targeting simple and clean solutions
• Avoiding any excessive quantity of optional features or profile
configurations
 Improved Coding Efficiency
• Average bit rate reduction of 50% given fixed fidelity
compared to any other standard
 Improved Network Friendliness
• Issues examined in H.263 and MPEG-4 are further improved
• Major targets are mobile networks and Internet
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Comparison of H.264 to existing standards
(low bit rates  videoconferencing)
Foreman QCIF 10Hz
39
Quality
Y-PSNR [dB]
38
37
36
35
JVT/H.26L
MPEG-4
MPEG-2
H.263
34
33
32
31
30
29
28
27
0
ITU-T
SG16
50
100
150
200
250
Bit-rate [kbit/s]
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Comparison of H.264 to existing standards
(high bit rates broadcasting)
Quality
Y-PSNR [dB]
Tempete CIF 30Hz
38
37
36
35
34
33
32
31
30
29
28
27
26
25
JVT/H.26L
MPEG-4
MPEG-2
H.263
0
ITU-T
SG16
500
1000
1500
2000
2500
3000
3500
Bit-rate [kbit/s]
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities: WP3
audio coding
o Wideband coding (Q 7/16):
• wideband speech coding at around 16 kbit/s
o 4 kbit/s speech coding (Q 8/16):
• procedure to continue under discussion
o Variable bitrate coding of speech signals (Q 9/16):
• work plan under discussion
• applications: 3G, VoIP, PSTN, PCME, DCME,…
ITU-T
SG16
o Software tools (Q 10/16):
• maintenance existing coding standards
• extension of the ITU-T SW tool library
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Working Party 4
Multimedia framework
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Status report of SG 16 activities:
MM Framework
o Telecommunications for Disaster Relief (Q.I/16):
• Support for emergency communications in disaster recovery
operations
• ETS trends: CSIP, TelephonyMM, NationalGlobal
• Q.I/16 endorsed by TSAG (SG2/SG16 responsibility?)
• Workshop in Geneva, 17-19 February 2003
(see http://www.itu.int/ITU-T/worksem/ets)
o Focus Group on FS-VDSL:
• Transfer of Full Service VDSL Forum activities to a Focus
Group of SG 16 in accordance with Rec A.7
• Adopt the FS-VDSL specifications
• Upgrading to ITU-T Recs foreseen in May 2003
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Focus Group on Full-Service VDSL
o New working strategy to cooperate with Fora/Consortia &
complement the work of ITU-T Study Groups
o A.7: establishment of an arms-length organization of ITU-T
o Aim: enable Triple Play using VDSL
o Five-part specification:
•
•
•
•
•
Part 1: Operator requirements
Part 2: System Architecture
Part 3: Customer Premises Equipment
Part 4: PHY for Interoperable VDSL Systems
Part 5: OAM & P aspects for FS-VDSL Services
o Parts 2+3 & 5 will be transformed into Recommendations;
ITU-T
SG16
Part 1 will be come a Supplement (H-Series)
o See www.itu.int/ITU-T/studygroups/com16/fs-vdsl
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Review
Organisation of FS-VDSL Focus Group work
CPE
Specification
CPE
Working Group
DRM
Expert
Group
System Architecture
Specification
System Architecture
Working Group
Operator
Requirements
Operator
Group
OAM
Specification
OAM
Working Group
VDSL
Working
Group
Architecture
Expert
Group
Key:
Responsible for creating
published document
Advises working groups
Contributions
to VDSL Standards
Physical Layer
Specification for
Interoperable VDSL
Systems
Published documents
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Conclusions – MediaCom 2004
o Coordination and harmonisation for development of standards
supporting converging services, IT/Telecommunications &
Broadcasting is under way and urgently needed
o MEDIACOM 2004 of SG16 is the umbrella for this activity in the
field of services and applications
o In SG 16, work is progressing in services, emergency telecoms,
telematic terminals, modems, MM Terminals (including IP
telephony), and media coding
o Exploring new innovative ways to work and increase the value
to the membership
o The workshops represent an excellent opportunity to better
understand the MM work and to coordinate the work among the
different players.
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Media Coding
Supplemental Slides
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Telephony-band
Speech Coding Families
Parametric
(Vocoding)
Waveform
Coding
Channel
PCM
Hybrid
Coding
Formant
DPCM
Homomorphic
ADPCM
LPC
DM
APC
SBC
RELP
ATC
MPLPC
Sinusoidal
CELP
Harmonic
SELP
Phase
MBE
ITU-T
SG16
ADM
CSVD
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Telephony-band
Speech Coding Families
Quality
Hybrid Coding
APC
ATC
MPLPC
RELP
DPCM
ADPCM
Log
PCM
CELP
Waveform Coding
MBE
LPC10e
Vocoding
1
2
4
8
16
32
64
Bit rate (kbit/s)
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
A2/A3 Non-ITU Standards
o MPEG2/Audio: audio coding > 64 kbit/s (1992)
o MPEG4/Audio: audio + speech coding at bit
rates between 64 and 2 kbit/s (1998)
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
A0-A1 Non-ITU Standards
o ETSI/3GPP:
•
•
•
•
•
•
13 kbit/s RPE-LTP (Full rate GSM, 1988)
6.5 kbit/s VSELP (Half-rate GSM, 1993)
12.2 kbit/s EFR (Enhanced full-rate GSM, 1996)
12.2 - 4.75 kbit/s AMR (Adaptive Multi Rate, 1999)
6.6 - 23.85 kbit/s AMR-WB (Wideband AMR, 2001)
AMR-WB+  ongoing work
o ARIB (Japan):
• Full-rate PDC (Personal Digital Communication) 6.7 kbit/s
VSELP
• Half-rate PDC 3.45 kbit/s Pitch Synchronous Innovation
ITU-T
SG16
CELP
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
A0-A1 Non-ITU Standards (cont’d)
o US TIA (ANSI)
• CDMA / 3GPP2
• IS96 8,4,2 kbit/s QCELP (Qualcomm CELP, 1992)
• IS127 8.55, 4, 0.8 kbit/s EVRC (Enhanced Var. Rate
Codec, 1996)
• IS733 13.3, 6.2, 2.7, 1 kbit/s VRC (Variable Rate Codec,
1998)
• CDMA2000 9.6,4,2.4,0.8 kbit/s SMV (Selectable Mode
Vocoder, SMV, 2002)
• Wideband SMV  ongoing work (target: end 2003)
• TDMA
• IS54 7.95 kbit/s VSELP (Vector-Sum Excitation
Lin.Pred., 1990)
• IS641 7.4 kbit/s ACELP (Algebraic CELP, 1997)
• PCS1800 (GSM upbanded to 1800 MHz)
ITU-T
SG16
• IS136-410 12.2 kbit/s US1 (1999)
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Still Image Coding Summary (1)
o Umbrella: T.80 [1992]
o JPEG:
T.81 (Part I), lossy and loss-less [1992]; T.83
(Compliance testing) [1994]; T.85 (Extensions, defs & testing)
[1996]; T.85 Corr.1 [1999]; T.86 Registration of JPEG Profiles
[1998]; T.87 (Baseline) Lossless and near-lossless compression
of continuous-tone still images [1998]
o
T.800, Core Coding System [2002]; T.803
Conformance Testing [2002] ; T.804 Reference Software [2002]
(other parts of the JPEG2000 standard will be ISO/IEC-only
texts.
JPEG2000:
o JBIG: T.82, loss-less [1993]; T.82 Corr.1 [1995]; T.85 JBIG for
fax terminals; T.85 Amd.1 [1996], 2 [1997]; T.85 Corr.1 [1997];
T.88 Lossy/lossless coding of bi-level images [2000]; T.89
Application profiles for Recommendation T.88 [2000]
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Still Image Coding Summary (2)
Planned new common texts:
o T.800: Part 1, JPEG 2000 Image Coding System: Core
o
o
o
o
o
o
Coding System
T.801: Part 2, JPEG 2000 Image Coding System:
Extensions
T.802: Part 3, Motion JPEG 2000
T.803: Part 4, Conformance Testing
T.804: Part 5, Reference Software
T.805: Part 6, Compound Image File Format
T.806: Part 7, Technical Report: Guideline of minimum
support function of Part-1
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
ITU-T Video Coding
o H.261: Video Codec for A/V services at p x 64 kbit/s
• The first practical video coding standard (1990)
• Used today in (ISDN) video conferencing systems
• Bit rates commonly 40 kbit/s to 2 Mbit/s
o H.262: Same as MPEG-2/Video (ISO/IEC 13818-2)
• Commonly used for entertainment-quality video applications
• The first practical standard for interlaced video
• Used in digital cable, digital broadcast, satellite, DVD, etc.
• Bit rates commonly 4-20 Mbit/s
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
ITU-T Video Coding
(continued)
o H.263: Video Coding for Low Bit Rate
Communication
ITU-T
SG16
• Significantly improved video coding compression
performance (especially at very low rates, but also at
higher rates as well)
• The first error and packet loss resilient video coding
standard
• Used in Internet protocol, wireless, and ISDN video
conferencing terminals (H.323, H.324, 3GPP, etc.)
• “Baseline” core mode interoperable with MPEG4/Video
• Rich set of features for many applications
• Very wide range of bit rates and possible applications
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003
Non-ITU-T Video Coding
o MPEG-1/Video (ISO/IEC 11172-2)
• The first video coding standard using half-pel motion
compensation
• Typical bit rates 1-2 Mbits/s
o MPEG-4/Visual (ISO/IEC 14496-2) [DivX]
• The first video coding standard defining arbitrary
object shapes
• Many creative features for synthetic and syntheticnatural hybrid content
• Contains essentially all features of all prior standard
codec designs
• Interoperable with ITU-T H.263 “baseline”
• Very wide range of bit rates and possible applications
ITU-T
SG16
ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003