8
Per Stream Bandwidth Utilization
To eectively plan a network, it is necessary to understand how bandwidth on that network will be utilized. By rst
understanding how much bandwidth each stream on each switch will utilize, it becomes easy to see how bandwidth
across the system will be utilized.
OmniStream Pro and R-Type products support AES 128 scrambling of their video and audio streams, enabling
protection of content across the IP link.
The bandwidth penalty for using scrambling is negligible and does not noticeably increase the overall bandwidth
utilization of the system.
OmniStream Pro products support redundancy of video and audio streams, allowing for decoders to automatically
detect stream failures and switch to backups.
For encoder bandwidth utilization per port, add the calculated bandwidth utilization for each session congured for
the port in question together.
For decoder bandwidth utilization per port, the calculation must be done dierently depending on the redundancy
mode used.
• Join when active – In this mode, only the active stream is subscribed, so total bandwidth utilization is the sum of
either primary or backup, using whichever stream’s utilization is higher so that worst case is calculated. Take care
to ensure that if it is possible for both HDMI’s input streams can ow on the same port, that this is included in the
calculation. For example:
»IP input 1 – 450 Mbps, ETH1, primary video for HDMI 1
»IP input 2 – 450 Mbps, ETH1, primary video for HDMI 2
»IP input 3 – 450 Mbps, ETH2, backup video for HDMI 1
»IP input 4 – 450 Mbps, ETH2, backup video for HDMI 2
»In this case, it should be gured that bandwidth per port is calculated as 900 Mbps, but the unit (both ports)
will not exceed 900 Mbps.
• Join always – As both primary and backup streams are always subscribed, the total bandwidth utilization is the
sum of all streams congured for the port in question.
Scrambling
Redundancy (OmniStream Pro Only)
