ITU-TSG16 ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003 Multimedia Services from Narrowband to Broadband Simão

ITU-TITU-TSG16SG16

ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003

Multimedia Servicesfrom Narrowband to Broadband

Simão Ferraz de Campos NetoCounsellor – ITU-T Study Group 16Multimedia Services, Systems and

Terminals

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Contents

o About ITU-T SG 16o Multimedia serviceso Summaries: access & media componentso Narrowband serviceso Broadband services

Additional slideso MediaCom 2004 Projecto Media Coding

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About Study Group 16

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ITU-T Study Group 16

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

Terminalso e-business and e-commerce

(www.itu.int/ITU-T/studygroups/com16)

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ITU-T Study Group 16 Structure

Study Group 16Multimedia Services Systems & Terminals

Pierre-André Probst

Working Party 1Modems and

Facsimile Terminals

Mitsuji Matsumoto

Working Party 2Multimedia

Platforms and Interworking

Sakae Okubo

Working Party 3Media Coding

John Magill

Working Party 4Multimedia Framework

John Magill (acting)

ITU-TSBCounsellor

Simão Ferraz deCampos Neto

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Multimedia Services…

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Development of MM Applications & Services

Factors:•Users needs•Market Trend•System Design•Architecture•Interoperable

Common Multimedia Parts, e.g., Coding (G,H,T-series), Security (X-series), Directory (X-series)

Integration or Assembling of

Multimedia Parts(Terminal Design; J,H-Series)

Users

Media (CS, PS, Cable)Wired/Wireless

(ITU and non-ITU)

Recommendations for Applications &Services (F,T series)Interoperability

Numbering,Charging Specs.(E-series)

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Services in the Multimedia Contexto 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 serviceso Users view versus technologists view

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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 serviceso Superset of monomedia serviceso 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 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

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How hungry an application?

2

1

0.5

Up

stre

am M

bit

/s

0.5 1 2 264Downstream (Mbit/s)

Broadcast & Interactive TV

Voice (PSTN)

Video conferencingInternet access

&Peer-to-peerapplications

e-commerce

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MM Service Descriptions

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-pictureso Quality level for media components: {-1, 0, 1, 2, 3, 4}

Service definition and requirements are available in the F-series. F.700 contains the umbrella definitions:

Integration of media components from the user’s point-of-view

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MM Service Descriptions (2)

F.70x: network-independent definitionsF.702 (F.MCV)-Multimedia conference servicesF.703 (F.MCS)-MM conversational services

Network-specific definitionsF.731- N-ISDN MM conference servicesF.732- B-ISDN MM conference services

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Access components:a brief summary

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Access methodso 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 rateso Fiber:

• Backbone (traditional)• To the curb (dreamnewer developments)

o Wireless:• Satellite, microwave• 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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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

o G.994.1, G.996.1 and G.997.1 for tests, management and handshake

o ADSL next slide

ITU-T Recommendations on DSL

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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)

ITU-T Recommendations on ADSL

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Recs. Bit rate Content Date

G.955 140 Mbit/s Single channelPDHLong. Compat.

1984

G.957 STM-16 Single channelSDHtransv. Compat.

1998

G.691 STM-4 up toSTM-256

Single channelTransv compat.Terminal OAs

1994-2000

Optical access standards (1)

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G.692 622 Mbit/s – 10 Gbit/s(STM-4 to STM-16)

WDM 4 to 32 chLong. Compat.Line amplifiersmono/bidirect.

1996 / 1998

G.959.1 2.5 and 10 Gbit/s

Up to 16 channels WDM

Pre-OTNSingle /WDMTransv Compat.Term. OAsId Interfaces

2000

G.693 10 – 40 Gbit/s(STM-64 to STM-256)

Single channelTransv. Compat.Intra office

2001

G.694.1G.694.2

≥ 80 Ch/10 Gbit/sUp to 18 Ch/2.5 Gbit/s

Dense WDM Coarse WDM

2002

Optical access standards (2)

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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 Audioo Videoo Still-imageo 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’so G.726 ADPCM coding (32; 40, 24 & 16 kbit/s) 1988o G.727 Embedded ADPCM coding (40-16 kbit/s) 1990o G.728 LD-CELP coding (16; 40, 11.8 &9.6 kbit/s)

1992o G.723.1 Dual-rate coding (5.3 & 6.3 kbit/s) 1995o G.729 CS-ACELP coding (8; 12.8 & 6.4 kbit/s) 1996-

98o 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 MPEG

Ongoing (JVT)

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Tempete CIF 30Hz

25

26

27

28

29

3031

32

33

34

35

36

37

38

0 500 1000 1500 2000 2500 3000 3500

Bit-rate [kbit/s]

Qu

alit

yY

-PS

NR

[d

B]

MPEG-2H.263

MPEG-4

JVT/H.26L

Comparison of H.264 to existing standards(high bit rates broadcasting)

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Media Coding: Still Image

o Still image (B/W & color) is used in 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)

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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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Multimedia terminals & systems

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) • 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• …

Integration of media components from the equipment/protocol point-of-view

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Functional model for H.324 Terminal

NetworkInterface

Audio Coding (e.g. G.723.1)

Video Coding (e.g. H.261, H.263)

Data Coding (T.120; V.14, LAPM)

System Control (H.245,SRP/LAPM)

Call Control (National standards; V.250)

MM Mux & Sync(Fixed network: H.223;

Mobile: H.223 Annexes A-D)User

Interface

PSTN multimedia terminals

• Will not scale towards bandwidth-hungry applications due to basic limitation of the network capacity

• Conferencing-centric

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ISDN multimedia terminals

Functional model for H.320 N-ISDN Terminal

NetworkInterface

Video Coding (H.261)

Audio Coding (G.711)

System Control (H.242)

Call Control (Q.931)

MM Mux & Sync

(H.221)

Data Coding (T.120)

UserInterface

• Will not economically scale towards bandwidth-hungry applications


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Functional model for H.323 Terminal

NetworkInterface

Audio Coding (e.g. G.711, G.729)


User Data Coding (T.120)


Call Control (H.225.0, Q.931)

MM Mux & Sync

(H.225.0)

UserInterface

Packet-based multimedia terminals

• Scales well towards bandwidth-hungry applications, depending on capacity of the underlying networks


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Interoperability amongst MM terminals

H.324 H.310

H.320H.323

Audio/Video

User data

User data

User data

User data

Audio/Video

Audio/Video

Audio/Video

Mux

QoS

RTP/Non-QoS

H.223

H.225.0

H.222.0H.222.1

H.221

Call Control (H.245)

Call Control (H.242/H.243)



H.223 Anx.A-D

Fixed

Mob

ile

Scope for H.246

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Broadband multimedia services

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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 9o IP Cablecom refers to standards for IP

cable communicationso IP Cablecom defines architecture and

interface specificationso It builds on J.83 / J.112 cable modem

transport o Initial market driver IP Cablecom for has

been IP telephonyo Flexibility for cable providers to offer new

services market deregulations

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Sample applications for ITU-T Cablecom

o Residential/Business IP Telephonyo Voice over IPo Video IP telephonyo Voice/data/video unified messagingo Enhanced conferencing and media

serviceso Entertainment Services

• Real-time multiplayer interactive gaming

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IP Cablecom architecture

AN Access NodeCM Cable ModemHFC Hybrid Fiber Coax NetworkMTA Multimedia Terminal AdapterPSTN Public Switched Tel. Network

Embedded MTA

PSTN

PSTNGateway

CallManagement

Servers

CMMTA

Back OfficeServers

Managed IPNetwork

AN

CM

HFC

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IP Cablecom Recommendations for interoperability intra-zone and with PSTN

ArchitectureJ.160 Architecture

SignalingJ.162 Network Call SignalingJ.165 IPCablecom SignalingJ.171 Trunk Gateway Control Protocol

Quality of ServiceJ.163 Dynamic QoS

Media/CodecsJ.161 Audio Codec Reqs.

Operating Support SystemJ.164 Event MessagingJ.166 MIB FrameworkJ.167 MTA ProvisioningJ.168 MTA MIBJ.169 NCS MIB

SecurityJ.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

ArchitectureFor further study

Signaling For further study

Operating Support SystemJ.164 Event Messaging

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Broadband MM over the local loop:Full service VDSL specifications

o Work under the FS-VDSL Focus Group (whose parent Study Group is SG 16)

o Video-centric services using the local loopo Opportunity for network operators to compete

with Cable network providerso Not ITU-T Recommendations (yet)o Assumes high rate availability at customer’s

premises: combination of fiber & VDSLo Current architecture is ATM-based (PPPoA), IP

extensions foreseen (PPPoE)

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FS-VDSL Architecture

Digital Broadcast Network

Interactive A/V

Network

Internet Service Provider

Voice Services

(IP, PSTN)

VDSL

Voice Services

(PSTN/ISDN) Digital Customer PremiseDistribution Network

Video onDemand

Broadcast TV

InternetServices

User premises

Local Loop &

Transmission Multiplexing & Delivery over optical

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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• Part 3: Customer Premises Equipment• Part 4: Physical Layer Specification for

Interoperable VDSL Systems• Part 5: OAM&P aspects for FS-VDSL Services

H.FSV -Arch

H.FSV-OAMP

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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

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Thank you for your attention!

For further contact, please feel free to contact:

Simão Ferraz de Campos NetoCounsellor, ITU-T Study Group 16

[email protected]

Tel: +41-22-730-6805Fax: +41-22-730-4345

http://www.itu.int/ITU-T

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AdditionalSlides

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MediaCom 2004An ITU-T Study Group 16 Project

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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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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.

MediaCom 2004: Objectives

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One of the main goals of the MediaCom2004 Project is to reduce need for higher layer Gateway functionality

Mobile NetworkIP NetworkCS Network

Telephony, FAX,VPS/VCS, Webcasting,

Multimedia

Telephony, FAX,VPS/VCS, Webcasting,

Multimedia

Gateway Gateway

MediaCom 2004: Goal

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USERSPRODUCTION

- TELEPHONE

- PC

- BROADCASTING

DATABASE

- FILMS

- BANK

- ……

SERVER 2 INTERACTIVE

NON

SERVER 1 INTERACTIVE

NETWORKS

INTERFACE

INTERFACE

- FIBRE

- CABLE

- TERRESTRIAL N.

- SATELLITE N.

RX

TX

RX

TX

RX

TX

...

P U

SERVER

ITU-R Study Group 6

Diagram of Interactivity in an Era of Convergence

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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

MediaCom2004 - Timelines

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Seeking to work with:o Other ITU-T Study Groupso ITU-R Study Groupso IETFo ISO/IECo Regional bodies, e.g. ETSIo Industry & other bodies as required

MediaCom 2004 Interactions

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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 Committeeo Aligned ‘Questions’ in Study Group 16o Database of multimedia related standards

MediaCom2004 Work Strategy

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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

MediaCom 2004 Framework in SG16

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o High level committee: role of the SC is to address coordination issues at high level and determine issues to be coordinated by the relevant technical groups.

o A tool to help coordination across all SDOs working on MM communication standards

o Address multilateral issueso Co-operation through discussion to provide

customer oriented solutiono Members: SGs ITU-T, SGs ITU-R, IETF,

MPEG, ETSI, W3C, ….

MediaCom 2004 Steering Committee (SC)

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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

MediaCom 2004 – Continued activities

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MediaCom 2004Highlights from the first workshop (IP-Networking and MediaCom 2004)

o Transition towards NGNo E-Commerce/E-businesso MM service evolutiono Convergence/Interactive broadcasto Service billing/accountingo IP VPNo MM mobilityo MM access platform

for more details, please consult the final report of the WS (SG 16 ITU-T website).

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o Service and network architectureo Security and privacyo MM quality of serviceo Broadband delivery and in-home distributiono Interactivity in Broadcastingo Voice/video coding and signal processing


MediaCom 2004 Highlights from the second workshop

(MM Convergence)

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o NGN standardisation needed to support new services on a large scale (new SG 13 Project)

o Network operators and service providers expect high profit but deployment may be slow on technical and regulatory grounds.

o Open interfaces and interconnection are key, interop with legacy systems needed for incumbents

o New broadband services provision underway (Hikari)o IP-based MM communication is not yet well accepted for

broadcasting applications (connectionless model). Work needed to overcome restrictions.


MediaCom 2004 Highlights from the third workshop:

(IP/Optical)

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Working Party 1 Modems and Facsimile Terminals

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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-to- end connection of V-series DCEs over IP-networks

Status report of SG 16 activities:Modems and Facsimile (1)

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Modem-over-IP context

IP Network

Gateway

Telephone

Modem

Fax

Fax

Modem

1 2 3

4 5 6

7 8 9

* 8 #

VoIP terminal

Modem Bank

Server Modems

SD

Central Office

SD

Central Office

Gateway

New Rec V.150.1: procedures for the end-to- end connection of V-series DCEs over IP-networks

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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

Status report of SG 16 activities:Modems and Facsimile (2)

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Some details on modem standards: V.34o 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.34V.32bisV.32V.22bisV.22• Uses other V-series recommendations for specific

functions such as V.8, V.8bis (startup), V.42 (error correction), etc.

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Some details on modem standards: V.90o V.90, PSTN modem with digital upstream up to 56

kbit/s and analogue downstream up to 33.6 kbit/s • 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.34V.32bisetc

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Some details on modem standards: V.92o 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

call-waiting events or outgoing call requests• Fallback to V.90V.34etc

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Fax-related Recommendations

o T.4, Standardization of Group 3 facsimile terminals for document transmission

o T.35, Procedure for the allocation of ITU-T defined codes for non-standard facilities

o T.37, Procedures for the transfer of facsimile data via store-and-forward on the Internet

o T.38, Procedures for real-time Group 3 facsimile communication over IP networks

o 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)

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Working Party 2 Multimedia Terminals and Systems

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Multimedia terminals & systems

o H.320: Communications over N-ISDNo H.310: Communications over B-ISDNo 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 Interworkingo H.248[.x]: Interworking between H.323 packet-

based networks and the PSTN

Integration of media components from the equipment/protocol point-of-view

ITU-TITU-TSG16SG16


ISDN multimedia terminals

Example: Functional model for H.320 N-ISDN Terminal

NetworkInterface

Video Coding (H.261)

Audio Coding (G.711)


Call Control (Q.931)

MM Mux & Sync

(H.221)

Data Coding (T.120)

UserInterface

ITU-TITU-TSG16SG16


Example: Functional model for H.323 Terminal

NetworkInterface

Audio Coding (e.g. G.711, G.729)


User Data Coding (T.120)


Call Control (H.225.0, Q.931)

MM Mux & Sync

(H.225.0)

UserInterface

Packet-based multimedia terminals

ITU-TITU-TSG16SG16


Example: Functional model for H.324 Terminal

NetworkInterface

Audio Coding (e.g. G.723.1)


Data Coding (T.120; V.14, LAPM)

System Control (H.245,SRP/LAPM)

Call Control (National standards; V.250)

MM Mux & Sync(Fixed network: H.223;

Mobile: H.223 Annexes A-D)User

Interface

PSTN multimedia terminals

ITU-TITU-TSG16SG16


Interoperability amongst MM terminals

H.324 H.310

H.320H.323

Audio/Video

User data

User data

User data

User data

Audio/Video

Audio/Video

Audio/Video

Mux

QoS

RTP/Non-QoS

H.223

H.225.0

H.222.0H.222.1

H.221


Call Control (H.242/H.243)



H.223 Anx.A-D

Fixed

Mob

ile

Scope for H.246

ITU-TITU-TSG16SG16


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):• Hybrid security profile to Rec H.235 on Security and

Encryption• Mobile security (Rec H.510)• Security for Emergency Telecommunications and

Disaster Relief (ETS)

Status report of SG 16 activities: WP2 (1)

ITU-TITU-TSG16SG16


H.235 - “H.323 Security”Security Protocol Architecture

AV Applications

Audio

G.711G.722G.723.1G.729

Video

H.261H.263

Encryption

RTCP

H.225.0Terminal

to Gatekeeper

Signaling

(RAS)

Terminal Control and ManagementData

Applications

SecurityCapabilities

SecurityCapabilities

T.124

T.125

Unreliable Transport / UDP, IPX Reliable Transport / TCP, SPX

Network Layer / IP / IPSec

Link Layer /......

Physical Layer / .....

T.123

Scope of H.323 Scope of H.235

TLS/SSL

Multimedia Applications, User Interface

TLS/SSL

Authenti-cation

RTP

Scope of T.120

H.225.0Call

Signaling

(Q.931)

H.245SystemControl

ITU-TITU-TSG16SG16


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-TITU-TSG16SG16


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-TITU-TSG16SG16


Working Party 3 Media Coding

ITU-TITU-TSG16SG16


o Media coding (Q E/16):• Media coding involves four aspects: Audio, Video, Still-

image & 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)

Status report of SG 16 activities:Media coding

ITU-TITU-TSG16SG16


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”

Status report of SG 16 activities: WP3JVT-Project (1)

ITU-TITU-TSG16SG16


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

Status report of SG 16 activities: WP3 JVT-Project (2)

ITU-TITU-TSG16SG16


27

28

29

30

31

32

33

34

35

36

37

38

39

0 50 100 150 200 250

Bit-rate [kbit/s]

Foreman QCIF 10HzQ

ual

ity

Y-P

SN

R [

dB

]

MPEG-2H.263

MPEG-4

JVT/H.26L

Comparison of H.264 to existing standards(low bit rates videoconferencing)

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Tempete CIF 30Hz

25

26

27

28

29

3031

32

33

34

35

36

37

38

0 500 1000 1500 2000 2500 3000 3500

Bit-rate [kbit/s]

Qu

alit

yY

-PS

NR

[d

B]

MPEG-2H.263

MPEG-4

JVT/H.26L

Comparison of H.264 to existing standards(high bit rates broadcasting)

ITU-TITU-TSG16SG16


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,…

o Software tools (Q 10/16):• maintenance existing coding standards• extension of the ITU-T SW tool library

Status report of SG 16 activities: WP3audio coding

ITU-TITU-TSG16SG16


Working Party 4 Multimedia framework

ITU-TITU-TSG16SG16


o Telecommunications for Disaster Relief (Q.I/16):• Support for emergency communications in disaster

recovery operations• ETS trends: CSIP, TelephonyMM, NationalGlobal • 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

Status report of SG 16 activities:MM Framework

ITU-TITU-TSG16SG16


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 VDSLo 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; Part 1 will be come a Supplement (H-Series)

o See www.itu.int/ITU-T/studygroups/com16/fs-vdsl

ITU-TITU-TSG16SG16


Organisation of FS-VDSL Focus Group work

Rev

iew

DRMExpertGroup

ArchitectureExpertGroup

Key:Responsible for creating published document

Advises working groups

Published documents

VDSLWorking

Group

System ArchitectureWorking Group

OAMWorking Group

CPEWorking Group

OperatorGroup

Contributionsto VDSL Standards

System ArchitectureSpecification

OAMSpecification

CPESpecification

Physical Layer Specification for

Interoperable VDSL Systems

OperatorRequirements

ITU-TITU-TSG16SG16


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.

Conclusions – MediaCom 2004

ITU-TITU-TSG16SG16


Media Coding Supplemental Slides

ITU-TITU-TSG16SG16


Telephony-band Speech Coding Families

Channel

Formant

Homomorphic

LPC

MBE

Parametric(Vocoding)

WaveformCoding

PCM

DPCM

ADPCM

DM

ADM

CSVD

HybridCoding

APC

RELP

MPLPC

CELP

SELP

SBC

ATC

Sinusoidal

Harmonic

Phase

ITU-TITU-TSG16SG16


Telephony-band Speech Coding Families

1 2 4 8 16 32 64

Vocoding

Waveform Coding

Hybrid Coding

LPC10e

MBE

CELP

APC

MPLPC

ATC

RELP

DPCMADPCM

LogPCM

Quality

Bit rate (kbit/s)

ITU-TITU-TSG16SG16


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-TITU-TSG16SG16


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 CELP

ITU-TITU-TSG16SG16


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)• IS136-410 12.2 kbit/s US1 (1999)

ITU-TITU-TSG16SG16


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 JPEG2000: 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.

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-TITU-TSG16SG16


Still Image Coding Summary (2)

Planned new common texts: o T.800: Part 1, JPEG 2000 Image Coding System: Core

Coding Systemo T.801: Part 2, JPEG 2000 Image Coding System:

Extensionso T.802: Part 3, Motion JPEG 2000o T.803: Part 4, Conformance Testingo T.804: Part 5, Reference Softwareo T.805: Part 6, Compound Image File Formato T.806: Part 7, Technical Report: Guideline of minimum

support function of Part-1

ITU-TITU-TSG16SG16


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-TITU-TSG16SG16


ITU-T Video Coding(continued)

o H.263: Video Coding for Low Bit Rate Communication• 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 MPEG-4/Video

• Rich set of features for many applications• Very wide range of bit rates and possible

applications

ITU-TITU-TSG16SG16


Non-ITU-T Video Codingo MPEG-1/Video (ISO/IEC 11172-2)

• The first video coding standard using half-pel motion compensation

• Typical bit rates 1-2 Mbits/so MPEG-4/Visual (ISO/IEC 14496-2) [DivX]

• The first video coding standard defining arbitrary object shapes

• Many creative features for synthetic and synthetic-natural 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

Documents

ITU-TSG16 ITU/BDT Arab Regional Workshop on DSL Services and Applications – Cairo, 4-6 March 2003 Multimedia Services from Narrowband to Broadband Simão