Multimedia Service System & DAVIC’s Approach

1998. 2. 13.

Jae-Woo Yang

ETRI

Contents

• Trends

• DAVIC specifications

• DAVIC’s second step

Myths of Convergence

• Telecommunications and broadcasting services

• PC and TV

Technology visions

Impact oftechnology

Time

Popular technology visions often overestimate near-term prospects...

But they underestimate long-term developments.

Technology costs less, content costs more

Cost of media production

Data processingData storage

BandwidthCost

Time

Mass Media

Percent Penetration of U.S. Households

1935 1945 1955 1965 1975 1985 1995 2005

1020

3040

5060

7080

90100

Television

Telephone

RadioVCR

Audio CD PlayersVideo-Game Consoles

CD-ROMsOnline Households

Digital DBS

CableTelevision

NEWSPAPERS ON THE WWW

• Advantages

– no delays due to printing & distribution

– possible to update contents

– hot links to related information on other sites

– immediate access to searchable archives

• Disadvantages

– expensive technology barrier

– downloading delays

– awkward to use & not really portable

– dependent on client “pulling” content

BROADCASTING

• Advantages– ease of use– immediacy– low cost per user

• Disadvantages– linear– ephemeral– no interactivity– no way to filter content to suit individual needs

DIGITAL BROADCASTING

Digital broadcasting permits: • broadcasting of multimedia services

– text (e.g. super-teletext based on HTML pages)

– still pictures

• data broadcasting

– real-time information, software

• Many broadcasters are attracted by these opportunities, either to offer programme-related services or to offer commercial services

DIGITAL AUDIO BROADCASTING (DAB)

• The data capacity of a DAB channel is 1.2 Mbit/s, but <10% will be available for non-audio services

• A 64 kbit/s channel can deliver:

– 28.8 MB in 1 hour

– 1 MB in 2 minutes

• A 28.8 kbit/s modem used to access Internet services usually delivers far less than 28.8 kbit/s

• Data services delivered via DAB will achieve continuous throughput at the nominal data rate (I.e. 64 kbit/s = 64 kbit/s)

PUSH SERVICES ON INTERNET

• “Push” services delivered over the Internet, such as Pointcast, allow users to specify their interests: – news items about specific subjects– share prices for a particular company– a football team– weather in certain cities

• The user’s computer periodically checks if any relevant new information is available, and downloads it for display

PUSH TECHNOLOGY

Essential elements of push technology

• Content delivered without user intervention

• Content filtering defined by client

Push technology is not new

• news agencies have supplied customised news for years using teleprinters

Users will be attracted by high quality content

– established media brands, such as newspapers and broadcasters

PUSH = BROADCASTING?

“Push” technology is:– similar to broadcasting in that many users receive

the same information simultaneously– different to broadcasting in that users only receive

their “narrowcast” information• Works best with “persistent” connections to the

Internet, rather than dial-up connections• Storage at the receiving terminal is essential

0.01

0.1

1

10

1990 1992 1994 1996 1998

Year

Retail costper MB(UK £)

Factor of 2 every18 months

HARD DRIVES

Factor of 2 every10 months

DAB & PUSH TECHNOLOGY

• DAB offers a persistent connection at 64 kbit/s• DAB + push technology = “a wireless newspaper”

– always the latest edition– up-dated continuously– tailored to your needs

• DAB cards in lap-top PCs could enable

“a wireless newspaper on the move”

PC vs. TV

They may not always share the same tool.

Richnessof

media

Flexibility/Interactivity

futureDigital TV

Home PC

High-Quality,Realtime

Moderate-Quality,Non-Realtime

Shared-Service.Non-Interactive

Personal-Service,Interactive

Internet Access

EDB IDB

VOD(IMM)

SVB

Local storage basedVOD

Local storage based VOD

NotationItalic font : possible newwork items.

Now

Market Area 1

Market Area 2

not fully compatibleHigh-Speed Data Services

Home Network

Best-effort video over the Internet

QOS-guaranteed streamed-AV service over IP

DAVIC isDAVIC is

• Int’l organization to specify global common specs related to:

• Digital AV Services• Systems and components to provide required

functions

OrganizationOrganization

M em bersh ip and N om in ia tion F inance and Aud it

S ta teg ic P lann ing S tandards Adv isor

C hie f O perating O fficer

App lica tions System s In tegra tion

Security Subsystem s

In form ation R epresenta tion Pysica l Layer

M anagem ent C om m ittee

Board o f D irectors

StructureStructure

• GA, BD, MC, TC

• Geographical balance• Asia, Europe, America

• Industrial balance• Telecom, Consumer, Computer, Broadcasting

What DAVIC has done?What DAVIC has done?

• End-to-end solution for VoD system a.k.a. remote VCR.

• Enhanced broadcast system is adopted in Europe.

• Provides Cable modem, MMDS, LMDS specs.• DAVIC specs to be ISO/IEC standards.• Solves some of conflicting global standards s

uch as AAL1 vs. 5, MPEG-2 vs. Dolby.

What happened to VoD service?

What happened to VoD service?

• Model is built and tested.– S1, S2, S3, S4, S5

• Inter-operability test was carried out.• Current product

– USA: A0 interface -

Bell South/Zenith/Divicom– Philips: Enhanced Broadcast– Korea: Interop test & trial

Why they have chosen DAVIC?

• Don’t want to be bound to the proprietary solutions

from left to right...

ContentProvider

DeliverySystem

DeliverySystem

UserSystem

ServiceProvider

Control/ SignalingUser data A/V and associated data Channel

Network Specific (SAAL,

LAPD etc.)

UNI Signaling

PresentationClient-

Network Signal

Network Specific (AAL 1, AAL 5, etc.)

MPEG 2 Systems

Application

Session

Transport

Network

Data link

Physical

Transport Stream

Video_PES packet

data_PES packet

MPEG2 Video Decoder

MPEG Audio Decoder

JPEG Decoder

etc.

Application

Control data / User data

Network Specific (jitter removal etc.)

Network Specific (AAL5,

X.25 etc.)

Access Control

Network Specific

Network Specific (ATM, QPSK, QAM, VSB etc.)

Audio_PES packet

DSM-CC PES packet

and from top to bottom...

System Reference ModelSystem Reference Model

A9

Principal ServiceInterface

Application ServiceInterface

Session and TransportService Interface

Network ServiceInterface

Physical Interface

A1A11 A10

SPS-SCSDeliverySystem

CPS-SPSDeliverySystem

ContentProviderSystem(CPS)

ServiceProviderSystem(SPS)

ServiceConsumer

System(SCS)

Region J

Service Consumer Model (STB)

Service Consumer Model (STB)

DeliverySystem Settop Box (STB)

A9 A1A0

NetworkInterface

Unit(NIU)

Product Entity

Application Entity

Environment Entity

Connectivity Entity

Human orMachineService

Consumer

Principal ServiceInterface

Application ServiceInterface

Session and TransportService Interface

Network ServiceInterface

RP3

RP5

RP7

RP2

Service Consumer System

PeripheralMedia

NetworkMedium/Media

Physical Interface

ServiceProviderSystem

Settop Unit (STU)

Application Program Interface (API)

DAVIC - A complete system

MPEGATM Forum

MHEG

DSM-CC

OMG

VESA

DVB

ITU NMF

IETFANSI

ETSI

ODA IMA

OMFW3C

ISO/IEC

DVB

Monterey Meeting SummaryMonterey Meeting SummaryMonterey Meeting SummaryMonterey Meeting Summary

• 1.3 published.

• CFP11 is issued

Vision - what is expected as a new set of specs?

Vision - what is expected as a new set of specs?

What is DAVIC’s role for IP-based system solution?

What is DAVIC’s role for IP-based system solution?

• System solution– IETF concerns only upper layers

• DAVIC has inter-industry members which is essential for developing emerging Multimedia system

DAVIC CFP 11

• A complete end to end system specification for – Digital Audio Visual broadcast over IP-

based networks– Delivery of Interactive Multimedia over IP-

based networks– Interactive Multimedia services based on

local storage

and

– Integration of DAVIC defined content and Internet content

– Integration of communicative services, real-time packetised audio and speech with IP in an DAVIC environment

– Integration of access network content distribution in an DAVIC environment

– Content Contribution Networks

Invite proposals are from

• content creators, packagers, programmers, server manufacturers, delivery media and service organisations, terminal device manufacturers, software vendors, integrators, governmental and regulatory organisations, standards bodies, research and academic organisations, industry consortia and any individual or organisation

• whose interest covers the topic of integrating Internet Protocol (IP) domain technologies into an end-to-end system, particularly in the audio-visual domain.

Proponents

• Proponents need not be members of DAVIC and their proposal may be derived from other domains where IP domain technologies are of key importance.

• Proponents may attend the Milan meeting and make a presentation of their proposal.

Digital A/V Broadcast over IP-based networks

• IP-based systems are an important new mechanism for delivering digital broadcast A/V information.

• This and other innovative systems could support continuous public TV/radio (“TV anywhere”), personal broadcasting or electronic program/service guides.

Delivery of Interactive Multimedia over IP

• Two-way IP based transport systems support interactive multimedia applications such as access to Internet services, VoD, tele-shopping, information and entertainment services, multi-party communicative services and gaming.

• Comprehensive specifications integrating end-to-end interactive multimedia IP-based systems have not yet been developed.

Interactive Multimedia Services Based on In-home Storage

• The cost of storage media, such as RAM and hard disk, is rapidly decreasing (e.g., for hard disks the cost/bit is halving every twelve months). Replaceable and recordable digital media such DVD and DVHS are also becoming available.

• Local storage in the home can ease delivery bandwidth limitations and latency constraints.

Interactive Multimedia Services Based on In-home Storage (II)

• Examples of applications that may benefit from home storage include – VOD– multicast VOD– personalised news services– software distribution– targeted advertising

• This presents exciting opportunities for new A/V and multimedia services.

Integration of DAVIC and Internet Content

• The Internet URL provides a mechanism to link content at different locations. An analogous mechanism could provide linkages to content with a temporal property. Such links may be valid only for a specific time interval. This mechanism would offer a new ability to relate digital A/V content, and to relate Internet and DAVIC content.

Integration of DAVIC and Internet Content (II)

• Examples of such links may be advertising links from TV programs to related web pages, program trailers (a TV program pointing to a future program), and web pages referencing TV content.

• DAVIC is requesting proposals for technologies to provide and manage such reference and linking capabilities.

Speech and Audio Services over IP

• Universally accessible and interoperable speech and audio services using IP will provide major improvements in person to person communication. Therefore, DAVIC seeks IP compatible interoperable tools for speech and audio to provide peer to peer communication services.

• DAVIC also seeks to develop comprehensive specifications integrating end-to-end IP-based systems.

Content Distribution From the Home

• One of the features of the Internet is the ability of an individual user to make available, or publish, non-commercial and original audio-visual and data content to other users. This capability would greatly facilitate intra-family and small group communications.

• DAVIC is requesting proposals to integrate an equivalent capability into the DAVIC specification.

Content Contribution Network Systems

• DAVIC requests contributions for technologies to support an end-to-end system for the wide area distribution of content from a source server to other remote servers. The systems are considered for both realtime (streaming-type) and non-realtime (store-and-forward-type) content transfer.

Related topics

• User and Market Requirements• End to End Application Requirements• Physical Layer Technologies• End-to-End Network and End User Signalling

Protocols• System Management Protocols and Integration• Digital Media and Application Environment

Specifications• End-to-End Security Technologies

Conclusions - actions to be taken

Conclusions - actions to be taken

• Digital Broadcast• IMM systems• IPRs• System solutions• Pre and post meetings

• exchange system knowledge• joint development of specs

• Joint experiments