have already been delivering for toptier sports environments – including fixed port networks, AV networks in stadiums, press rooms, production equipment, IP ST2110-based stadiums or show control systems, amongst others.” Germany’ s Bundesliga, meanwhile, relies on a fibre-optic network operated by Sportcast, a subsidiary of the league, with regional provider NetCologne supporting the connectivity to its central hub. In Scotland, BT provides the highcapacity network that supports VAR operations for the Scottish Premiership, connecting all top-flight grounds to a central operations centre.
CREDIT: MIKE HEWITT / STAFF
NETWORKS
The synchronisation challenge and the broader tech stack Beyond raw bandwidth and resilience, the network must support a sophisticated and perfectly synchronised ecosystem of data sources. Professional VAR systems predominantly rely on cameras with uncompressed Serial Digital Interface( SDI) outputs to avoid the latency and visual artefacts introduced by IP camera compression. In addition, the‘ smart’ football adds another layer of data, with an integrated Inertial Measurement Unit( IMU) capturing the ball’ s motion 500 times per second to provide the exact“ kick point” for offside decisions.
Ensuring every camera, microphone and sensor feed is perfectly time-aligned is a significant industry-wide challenge. According to Andy, it needs robust metadata from the point of acquisition, a standard that is still evolving.“ As an industry we’ ve got more work to do there to get that fully standardised,” he says.
The drive for technological perfection is a response to undeniable market demand. Neil Swarbrick, the former head of VAR for the Premier League, defended the VAR system by saying it’ s“ here to stay” and that fans need to“ just live with it, just grow with it”. He has further highlighted that decision accuracy has improved and that VAR is an evolving process.
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