Video, just like voice data in VoIP systems, is a very demanding data stream and will immediately expose a weakness in the network. The network must be capable of supporting multiple video, audio and data streams in a reliable, synchronized manner, without disruption. When delay, packet loss, and jitter reach thresholds where the video is impacted visually, the usefulness of that video drops to zero. It is important to understand the complexities of video in IP data networks so that these factors can be mitigated.
Networks that are designed to move NDI video streams should be thought of as being primarily utilized for video. IP networks are by their very nature “best effort delivery” systems and were originally developed for the transport of data. Data services, by contrast to video, can function happily with packet retransmissions, lost packets, and even packets arriving out of order. Video streams, while still data, are much more rigid in their requirements.