EVS XT4K - Internal Bandwidth

4.3.3. Internal Bandwidth
General Description
This section helps you select the most appropriate bitrate for the native codec(s) on the
EVS server, on the basis of the internal bandwidth, the channel configuration, and the
calculated number of real-time channels at the EVS server level.
The section therefore presents tables including the following parameters:
1. Video Bitrate: codec bitrate set by the user in the Codec section of the Server tab in
the Multicam Configuration window.
2. Fields/Block: numbers of video fields that can be stored in one disk block of 8MB,
taking into account 8 audio track, in 1080i and UHD-4K.
3. Actual Bandwidth: actual disk/network bandwidth required for the real-time record or
real-time playback of one video stream and its associated audio tracks.
4. Max. RT Channels: maximum number of video channels (real-time record or real-time
playback) that one EVS server can support for a given frame rate and bitrate.
Since an XT4K server can have a maximum of 12 local video channels, any value
higher than 12 means that these additional real-time accesses can be used for
transfers over the XNet (SDTI) network.
The RT Channels calculation is based on the use of Seagate disks of 900 GB (10K8)
configured in 5+1 raids. Such disks are able to write 400 MB/s.
16 4. Software Specifications
EVS Broadcast Equipment SA Issue 15.2.A- June 2017