EVS XT-3, Руководство по техническому обслуживанию оборудования

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4.4.2. Gigabit Ethernet Transfers
General Description
This section provides empirical figures on real-time transfers for backup and restore jobs
processed by the GbE network. The GbE bandwidth however relies on the customer
network behavior, which depends on external conditions, and partly on the EVS servers.
Warning
The observations and data focus on steady rates: the transfer performances
with small clips will be lower as they generate a lot of starts and ends of
sessions.
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 GbE network.
Calculation formula:
Maximum GbE bandwidth / actual block-based
bandwidth = real-time transfers
4. Transfer Speed: transfer speed for a single transfer expressed in faster than-real time
speed. The calculation formula is the same with a reference GbE bandwidth that is
slightly smaller.
Note
With the 1GbE ports of the Gigabit-H3X board, the transfer speed in real-time for
a single A/V stream is 10% lower compared to the number of real-time transfers.
This discrepancy does not exist with the 1GbE ports of the 10GbE board.
34 4. Software Specifications
EVS Broadcast Equipment SA Issue 12.05.C - November 2014