Broadcast Engineering - February 2009 - (Page 32)

Feature VIDEO ROUTING Ethernet Video to net coder 224.0.0.1 It’s worth saying a word or two about Ethernet, which has become Video to net coder 224.0.0.2 the dominant network technology in the IT computing world. Gigabit Video to net coder 224.0.0.3 Ethernet provides the bandwidth required for handling video, and its Video to net coder 224.0.0.4 widespread adoption means that Net to video coder 224.0.0.1 costs are continually falling. Ethernet does not define any de- Figure 4. A 4 x 4 crosspoint router with equivalent routing Net to video coder 224.0.0.3 vice-to-device timing or flow con- on a multicast network trol mechanisms, as network devices Net to video coder 224.0.0.1 transmit data packets asynchronously to one another. The delays between deliver the quality of service required ber of the IP set Net to video coder 224.0.0.2 network nodes are a function of the for video distribution. However, so- that provides network loading and the devices in lutions are provided by protocols packet orderthe network, such as switches and higher up in the ISO Open Systems ing and timing information relating hubs. So if network traffic exceeds the Interconnection (OSI) model. to the source data being carried in bandwidth of a network device and Common examples are Trans- the packet, allowing a solution to be data is lost, Ethernet does not provide mission Control Protocol (TCP), engineered around the limitations of any retry mechanisms. which provides acknowledge and re- Ethernet. The variable network latency and try mechanisms to ensure successful All of this makes networks a vilack of guaranteed data delivery transmission of data, and Rate Con- able option for the distribution of Obor_Zeus 7/25/08 12:19 PM Page 1 seem to suggest that Ethernet cannot trol Protocol (RCP). RCP is a mem- video, and there are technologies that If you could create the perfect service desk and asset management software, your life would be much simpler. Lucky for you we’re into simple. Anytime, anywhere. That’s the beauty of our 100% web-based service desk and asset management system. Made by broadcasters for broadcasters, Zeus allows an infinite number of users to access the site from any Internet connection at anytime. Isn’t that simple? 32 broadcastengineeringworld.com | February 2009 http://www.broadcastengineeringworld.com

Table of Contents Feed for the Digital Edition of Broadcast Engineering - February 2009

Broadcast Engineering - February 2009 Contents Viewing the Slowdown in 3-D Examine Workflows Tapeless Technology Digital Audio 24p and 25p Judder Video Routing: A Look at What's Next Managing AFD The Right Connections Solid State Logic's AWS 900+ SE and More... Advertisers Index

Broadcast Engineering - February 2009

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