DLNA TECHNOLOGY TECHNICAL SEMINAR ON

Presented byMABEL CHRISTINA.A(1ck10cs017)

Dept of computer science & engineering

Under the guidance of prof.Lakshmi bai G Asst Prof, Dept of CS&E

AGENDA

INTRODUCTION

WHAT IS DLNA?

WHY DLNA?

DLNA ARCHITECTURE a) pull type

b) push type

INTER-OPERABILITY AMONG VENDOR PRODUCTS

DLNA DEVICE CLASSES

CONCLUSION

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Introduction DLNA is an acronym for Digital Living Network

Alliance. Established by Sony in June 2003. Interoperability guidelines for sharing digital media. Example use cases include:

i. Send

ii. Push

iii. Find and Play or “Play to…”

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Use Cases

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Figure 1a) Traditionally, displaying a video or photo from a mobile phone on a TV involves such a tedious and time-consuming process that consumers rarely attempt it.

Figure 1b) The value proposition of DLNA is seamless and effortless sharing of content, enabling consumers to send a copy of a video or photo directly to the TV in a single step.

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What is DLNA?

DLNA is a standard based on UPnP model.

Main goal is to attach all devices to each other over a network.

UPnP is set of protocols for devices to discover each other’s presence on a network.

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Why DLNA? Interconnecting of devices over a network.

Three main pools of electronic goods that prevail in today's world are

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Contd…

Consumers wish to inter-operate in these 3 zones

  

1) consumer electronics

2) computing industry and

3) mobile devices.

They provide a seamless environment for sharing and growing new digital media and content services.

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Contd…

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DLNA System Architecture

Pull-type architecture

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DLNA Pull-type architecture is suitable for desktop devices.

The Pull-type Model has a

(1).Digital Media Player (DMP) which receives user commands through a user interface (Pull-UI).

(2).The control server browses the Content Directory Service (CDS) for the user’s query.

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(3).Digital Media Server (DMS) detects the URL of the target content and passes on to Transport client.

(4).The Transport client in DMP uses this URL to retrieve the target content from the transport server in DMS.

(5).The play engine in DMP receives the content and renders it on a display.

(6).Note that there is no user interface in the DMS.

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Push-type architecture

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The Push-type architecture is suitable for handheld mobile

devices.

This model has a

(1)Digital Media Renderer (DMR) is adopted as the player. It has no user interface.

(2)The Play engine is controllable from outside.

(3)Push controller is added into the DMS which provides push controlling functions (i.e. a user interface and a player control function). 14

Inter-operability among vendor products

The devices and software of DLNA devices should be interoperable.

Vendors and manufacturer has to obey some of standards.

The building blocks in order to achieve interoperability are:

Networking and connectivityDevice discoveryCommon media format and streaming protocolsQoS

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DLNA Device Classes

Home network devices

Digital Media Server(DMS)

Digital Media Player(DMP)

Digital Media Renderer(DMR)

Digital Media Controller(DMC

Digital Media Printer(DMPr)

Mobile Digital Media Server (M-DMS)

Mobile Digital MediaPlayer (M-

DMP)

Mobile Digital MediaDownloader (M-

DMD)

Mobile Digital MediaUploader(M-

DMU)

Mobile Digital MediaController (M-

DMC)

Mobile Interoperability Unit

(MIU)

Mobile Network Connectivity Function

(M-NCF)

Mobile Handheld Devices

Home Interoperability Devices

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Home Network Devices consist of:

1) Digital Media Server (DMS)

2) Digital Media Player (DMP)

3) Digital Media Renderer (DMR)

4) Digital Media Controller (DMC)

5) Digital Media Printer (DMPr)

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Mobile Hand-held Devices category includes devices for server, controller and player, with similar functionality as in the Home Network Devices category.

Additionally, the class contains:

1) Mobile Digital Media Uploader (M-DMU)

2) Mobile Digital Media Downloader (M-DMD)

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Home Interoperability Devices consists of:

1) Media Interoperability Unit (MIU)

2) Mobile Network Connectivity Function (M-NCF)

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Digital Rights Management (DRM)

Content must be protected from unauthorized copying and use.

Today, there are several DRM technologies available to device designers and content providers.

For example: (1)authentication

(2)authorization

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companies

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Conclusion DLNA provides interconnecting of devices at home or

office.

It operates within a range of 50 to 75 meters.

The best aspect of DLNA is that it allows products

from different manufacturers to talk to each other.

With DLNA all leading companies are tied in a

technological knot; there is interdependence, yet

independence with their own products.

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REFERENCES [1] DLNA www.dlna.org[2] UPnP www.upnp.org[3] DLNA Overview and Vision White Paper, 2007

http://www.dlna.org/en/industry/about/dlna_white_paper_2006.pdf

[4] DNS Based Service Discovery: Zero Configuration Networking, 2007 http://www.zeroconf.org/

[5] Home Phone-line Networking Alliance http://www.homepna.org

[6] Approaches to Home Connectivity, Marko Berg, Helsinki University of Technology marko.berg@iki.fi

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THANK YOU!

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