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Technical Seminar on

By

CHETHAN J

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Introduction

DLNA is an acronym for Digital Living

Network Alliance. It is a capability in a

device allowing it to talk to other devices

with another DLNA device.

It interconnects electronic devices within

a zone.

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What is DLNA?

DLNA is a standard based on UPnP model, whoseprimitive goal was to attach all devices directly tocomputer.

With a view to interconnect devices seamlessly,DLNA was brought to light. DLNA represents thecontent negotiation and sharing portion.

At a customary level, a DLNA device works like anyother device by discovering other DLNA-enabled

hosts. But its competence doesnt stop there. TheDLNA device goes on to learn other devicescapabilities.

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Why DLNA?

Three main pools of electronic goods

that prevail in today's world are

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Why DLNA? Contd

Consumers wish to inter-operate in these 3zones

Digital Living Network Alliance (DLNA) is across-industry organization of leading operatorsof these 3 islands - consumer electronics,computing industry and mobile devices.

They provide a seamless environment forsharing and growing new digital media andcontent services.

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Contd

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UPnP Origin of DLNA

DLNA in its primitive form originated fromUPnP Universal Plug and Play

UPnP works on these basic schemes: Addressing

Discovery

Description

Control

notification

Event

Presentation

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Technical view of a DLNA network

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All of this requires three basic components - a player, a server and a

stream of data that are all compatible with each other.

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Networking and connectivityWith the network addresses getting depleted, IPv6 protocol emerged, animproved version of IPv4.

Advantages of using IP in digital home network:

IP allows applications running over different media to communicatetransparently.

IP can connect every device in the home to the Internet. Since IP isthe protocol of the Internet, any device in the digital home can bepotentially connected to any other Internet-connected device in theworld.

IP connectivity is inexpensive. Because it is ubiquitous, economies ofscale and competition combine to make physical mediaimplementations of IP available at lower cost than other technologies.

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DLNA System Architecture Pull-type UI

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DLNA System Architecture Push-type UI

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Discovery

Discovery includes device and servicediscovery.

This takes into account -

Discovering the presence and capabilities ofother devices in the connected network.

Control and interconnect with the discovereddevices.

The Service protocol used in DLNA isSSDP - Simple Service Discoveryprotocol.

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Common media formats and

streaming protocolsTable 1. DLNA Media formats for Home Devices

Media Formats Required Formats Set Optional Formats Set

Imaging JPEG GIF, TIFF, PNG

Audio LPCM (2 channel)MP3, WMA9, AC-3, AAC,

ATRAC3plus

Video MPEG2 MPEG1, MPEG4, WMV9

Table 2. DLNA Media formats for Mobile/Handheld Devices

Media Formats Required Formats Set Optional Formats Set

Imaging JPEG GIF, TIFF, PNG

Audio MP3 and MPEG4 AAC LC

MPEG4 (HE AAC, AAC LTP, BSAC),

AMR, ATRAC3plus, G.726, WMA,

LPCM

Video MPEG4 AVC (AAC LC Assoc Audio)

VC1, H.263, MPEG4 part 2, MPEG2,

MPEG4 AVC (BSAC or other for

Assoc. Audio)

Protocols define the mode of transfer. DLNA uses HTTP as its protocol for

streaming.

t t

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nter-opera ty amongvendor products

There must be a common standard amongthe products for the operation and DLNApublishes guidelines for inter-operability.

Quality of Service (QOS)

Quality of service is the ability to providedifferent priority to different applications,users, or data flows, or to guarantee acertain level of performance to a data flow.

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Authentication &

Authorisation

Authentication is the mechanism whereby

systems may securely identify their users.

Authentication systems provide an answer to thequestions:

Who is the user?

Is the user really who he/she represents himself to be?

Authorization, by contrast, is the mechanism by

which a system determines what level of access a

particular authenticated user should have to

secured resources controlled by the system.

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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 devicedesigners and content providers.

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Use Cases

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Conclusion

With growing demand for consumer goods, there is an equalrise in crave for interconnecting devices, be at home or office.DLNA is THE way to achieve is.

The best aspect of DLNA is that it allows products from differentmanufacturers to talk to each other.

With DLNA all leading CE companies are tied in a technologicalknot; there is interdependence, yet independence with their ownproducts.

In the near future, digital homes will contain intelligent platforms

which will manage and distribute rich digital content torendering devices such as televisions and wireless monitorsfrom devices such as digital cameras, camcorders andmultimedia mobile phones.

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Questions?

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Thank You !