Dvb x for delivering services
Download
1 / 28

DVB-x for delivering services - PowerPoint PPT Presentation


  • 89 Views
  • Uploaded on
  • Presentation posted in: General

DVB-x for delivering services. Mika Grundström mika.grundstrom@nokia.com tel. 03-272 5894. Outline. Introduction Services DVB-x specifications MPEG over DVB-x Delivering data (IP) services Conclusions. Introduction. DVB project ETSI specified standards

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha

Download Presentation

DVB-x for delivering services

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


DVB-x for delivering services

Mika Grundström

mika.grundstrom@nokia.com

tel. 03-272 5894


Outline

  • Introduction

  • Services

  • DVB-x specifications

  • MPEG over DVB-x

  • Delivering data (IP) services

  • Conclusions


Introduction

  • DVB project

  • ETSI specified standards

  • Delivery of video services but...

  • Broadcast is :

    • video

    • audio

    • data


Services

  • Traditional service:

    • Broadcast video (MPEG-2 TS)

  • Newer services:

    • Enhanced/interactive television

    • VoD

    • KoD

    • MoD

    • Internet access


The use of DVB containers


DVB Broadcast Channels

  • There are number of broadcast channels:

    • DVB-S : Satellite

    • DVB-T : Terrestrial

    • DVB-C : Cable

  • Traditionally the use have been video broadcasting

  • In the future also data

  • Economical and massive bandwidth pipe for citizen’s Internet access


DVB-x standards

  • DVB-S

    • Satellite service and on-going

    • Video and data (uni-directionality)

  • DVB-C

    • Cable service, on-going

    • Video and Internet access (bi-directionality)

  • DVB-T

    • Terrestrial service , analog switch off

    • Broadcast video (regulatory issues)


DVB used in the world


DVB-S

  • Mature broadcast video service via satellite

  • Bit rate varies max 40 Mbps

  • Continental scope

  • Internet access and data services

  • Requires out-of-band return channel


DVB-C

  • Developing broadcast video service

  • Big potential in Internet access offering

  • Bit rates about 34 Mbps

  • Requires network update in many cases


DVB-T

  • Trial phase, three transmitters

  • Bandwidth capacity 20-32 Mbps

  • Mobile reception possible

  • Unidirectional

  • Data services limited (regulations)


DVB-T radio


MPEG over DVB

  • Traditionally MPEG-2 TS over DVB-x

  • Broadcast service

  • Other services - MPEG-2 TS is framing

  • How about Video over IP over MPEG-2 TS over DVB-x?

  • Multiplexing dilemma


Packetisation


MPEG over DVB

  • Problem with the service provider

  • Duplicated service infrastructure

  • Content management problem

  • Service Information (SI) needed

    • User and Program information

    • Automatic tuning to TS

  • DVB Multimedia Home Platform (Java based)

    • Service creation


Providing data services

  • Sharing downstream large bandwidth

  • Requires return channel

  • Routing problem

  • Spectrum allocation management

  • Location based services


DVB-S data reception


Data Broadcasting

  • DVB defined encapsulation

  • Multiprotocol encapsulation over MPEG-2 TS

  • Does not define a complete system model

  • Network operator has an option with the use of different technologies

  • Linking the Internet (bi-directional) and broadcast (unidirectional) channels is a challenge

    • routing issues

    • TCP acknowledgements

    • HTTP and other protocol support


Data packetisation options


DVB data encapsulation options

Application

Service

Adaptation

Service

Adaptation

Service

Adaptation

Service

Adaptation

Datagram IP

Service

Specific

Multiprotocol

Encapsulation

Data Streaming

DSM-CC

Private Data

Data Piping

PES

Section

MPEG-2 Transport Stream


MAC address structure


DVB data broadcast system


Data delivery using multicast in DVB


demux & descra.

Data delivery to portable device

Optional MpegTS

DVB broadcast network

Multicast data

Mux & Scrambling

Feed sender

server

(router)

Broadcast

subnet

IGMP

Internet

Broadcast control &

management station

uHTTP

uHTTP

UDP

UDP

IP

IP

IP

IGMP

DVB mpe

X

X

DVB mpe

mux & scrambling

MPEG TS

MPEG TS

MPEG TS

DVB

DVB

DVB

DVB phy

phy

phy

phy


Protocol issues

  • Service Announcement Protocol

    • Simple protocol for informing of multicast sessions

  • Service Description Protocol

    • Describes multimedia session properties

  • Uni-directional Link Routing

    • Routing over broadcast links

    • Currently not applicable

  • Unidirectional Hyper Text Transfer Protocol

    • Robust protocol to transfer HTTP

    • retransmissions and error correction


Conclusions

  • DVB Broadcast channels are cost-effective way providing Fast Internet Access

  • Content packaging is in key role

  • Mobile reception using DVB-T increases the number of users and possible applications

  • Technical solutions exist

  • Maturity to be achieved

  • Large scale deployment can be started today


ad
  • Login