lan digital audio

Greg Van DyneDecember 4, 2007

AgendaIntroductionTechnical OverviewProtocols DemonstrationFuture TrendsReferences

IntroductionLocal Area Networks (LANs)

Small geographic areaShared resourcesWired – IEEE 802.3Wireless (Wi-Fi) – IEEE 802.11

Introduction Cont.MP3 Marketing exploding

Expected to reach 286 million by 2010 (Cadden, 2006).

Technology advances – more features gain edge

ScenarioLarge collection of digital music and want to

share it with roommates and be able to share with each other.

Want to play music with stereo system in living room

Running wire is undesired.

Network Attached Storage (NAS)Data easily shared

over LAN.

AirTunesApple’s Airport

ExpressCreate/join wireless

networkIntegrated into iTunes.Digital audio streamed

to remote speakers.Compresses audio

stream on the fly using Apple’s Lossless Compression and encrypts data streams

DLNADigital Living Network AllianceInternational, cross-industry collaboration.Seamless interoperability between network

of PCs and consumer electronics.

Layout

Airport Express Setup Guide

ProtocolsDHCP – Dynamic Host Configuration Protocol

Assign IP addresses to devicesTCP/IP – Transmission Control

Protocol/Internet ProtocolUDP – User Datagram Protocol

Future TrendsHigher data rates (802.11 N)Wi-Fi enabled MP3 playersOther vendors join market

ReferencesCadden, C. (2006) “MP3 Player Market to Reach

286 Million Units by 2010.” In-Stat.com. Retrieved Nov. 23, 2007. http://www.instat.com/press.asp?ID=1648&sku=I

N0603155ID.Snell, J. (2004) “How AirTunes Works”

Macworld.com. Retrieved Nov. 23, 2007. http://www.macworld.com/weblogs/editors/archi

ves/000212.php.Wikipedia. (2007) “Digital Living Network

Alliance.” http://en.wikipedia.org/wiki/Digital_Living_Network _Alliance