Networks
The network between the user and the video server is often the hardest part to get right. Most networks currently work on a contention basis where all users compete for bandwidth. This is fine for applications like email and file transfer where the user often does not care if there is a slight delay while the network is used by another user.
In the case of moving images and sound it is vital that all the data arrives in the right order and quickly enough to allow the images or sound to be played back without a break. To deliver this quality of service is difficult, especially where users are distant from the video server and crossing networks from different suppliers. To enable the highest probability of successful delivery look to designing a network which spreads the load where possible and provide enough capacity to ensure that congestion does not impact the delivery.
The JANET Video Technology Advisory Service will be able to provide guidance on network design for video.
Further information on the new Super Janet 4 network
Further information:
Frequently Asked Questions
These Technology notes were originated by the British Universities Film and Video Council and last updated in 2005 (© BUFVC 2005).
Please ensure you have up-to-date information before you begin any critical work.
