EVS XT4K - Network Transfers; Xnet Transfers

4.4. Network Transfers
4.4.1. XNet Transfers
Rule
This section provides figures on transfer speeds for jobs processed by the XNet (SDTI)
network.
The section presents data in tables including the following parameters:
1. Field Rate: field frequency used, or number of video fields transferred per second.
2. Video Bitrate: codec bitrate set by the user in the Codec section of the Server tab in
the Multicam Configuration window.
3. RT Transfers: maximum number of simultaneous transfers of A/V data that can be
processed for the given frame rate and video bitrate through the SDTI network.
Calculation formula: Maximum SDTI bandwidth / actual block-based
bandwidth = real-time transfers
When A/V data is transferred through the XNet network, you should take into account the
following maximum bandwidths on an SDTI 3 Gbps network:
• 240 MB/s for transfers between EVS server having only H3XP H3XP-S boards.
Example in HD
How many real time transfers can I do over an XNet network if I work with Apple ProRes
422 at 120Mbps in PAL?
Calculation: Maximum SDTI bandwidth / Actual bandwidth = real time transfers
240 MB/s / 16.6 MB/s = 14.4 real time transfers for SDTI3Gbps
This is the maximum real-time transfers the network connection can support.
Example in UHD-4K
How many real time transfers can I do over an XNet network if I work with XAVC-Intra 4K
at 500Mbps in PAL?
Calculation: Maximum SDTI bandwidth / Actual Bandwidth = real time transfers
240 MB/s / 66.6 MB/s = 3.6 real time transfers for SDTI3Gbps.
This is the maximum real-time transfers the network connection can support.
It is obviously also necessary that the XT4K where the material is stored has enough local
disk bandwidth to feed the network accesses, on top of its own local channels (see Max.
RT Channels).
TECHNICAL REFERENCE MANUAL XT4K Server 15.2
4. Software Specifications 23