In Broadcast - November 2021 - 38

38
www.inbroadcast.com | Vol: 11 - Issue 11 | November 2021
InStudio
VAR Basics: The Architecture and
Geography of VAR Solutions
- Pros and Cons
T
By Igor Vitiorets, CTO, Slomo TV...
he VAR system for football
has both technical and human
components. The technical component
includes cameras, servers with controls,
monitors, equipment in the RRA area,
and a Referee Intercom system. This
equipment is handled by engineers and
is used by replay operators and VAR
referees on one side, and referees on
the pitch on the other. All this forms
the VAR complex.
The video assistance to the referees
on the pitch is provided from a
specialized dedicated location or Video
Operation Room (VOR). So where
should this " heart " of football videorefereeing
be located?
It all depends on the cost and the
geographical aspects. There are two
main cases: local usage, when VAR
equipment and VOR room are located
at the arena, and centralized solution
(VAR center). Let's talk about the
pros and cons of the different VAR
solutions. We will focus on solutions
that use broadcast cameras.
VAR center
At the first glance, it seems to be
the simplest and most logical solution.
The whole complex is located in one
geographically advantageous place.
VAR center allows covering the
whole competition with a reasonably
small number of servers (the number
of parallel matches in the tournament
+ one spare) and does not require staff
travel. VAR referees and operators
are
geographically
separated
pressure
on
from
the game itself, which reduces the
psychological
them.
It is also possible to train referees
and operators on real matches by
connecting signals to multiple VORs.
They can practice and fine-tune their
skills without affecting the game.
With the obvious benefits, the
implementation of such a project
involves a number of serious issues.
Challenges
The main and central task is the
transmission of video signals from
the cameras at the arena to the VAR
center and the return communication
channel between the referees on the
pitch and the VOR room, as well as
the signal to a monitor in the Referee
Review Area (RRA).
While video calls are a standard
feature inherent in any smartphone,
it is not that simple. In football, the
identification of the offside position
is in the category of moments subject
to video review. When analyzing these
situations, it is necessary to determine
the exact position of objects at the
same moment in time on different
cameras.
This requires the video
streams from the cameras to be
synchronized. If non-synchronous
cameras are used, standard Internet
video streaming systems make
it
impossible to synchronize frames
from different cameras in the VAR
center. Things are better when using
synchronous cameras, but if there is
a desync, we cannot synchronize the
streams on the receiving side.
The Internet connection must have
low ping, which means you have
to
use
broadcast-grade
to
provide
equipment
to transmit video and have wide
bandwidth
acceptable
quality (approx. 150-200 Mbps for a
single HD channel).
You also need a backup system
because if the Internet connection is
lost, the video material is not recorded
by the VAR server.
Pros: Savings on equipment, space,
people, travel and transportation
costs. All signals come to one place.
Ability to conduct training at real
matches and organize video walls with
signals from several matches.
Cons: High operational
expenses
of reliable Internet connection with
low ping and large bandwidth, as well
as expensive equipment to ensure
high image quality. Difficulty with the
communication channel and video to
the RRA monitor, synchronization of
video streams.
The implementation of such projects
requires a lot of effort, financial and
human resources.
Local usage -
stationary and mobile systems
In this case, the entire VAR complex
is located at the stadium. There are
two approaches - stationary or mobile
solution.
Stationary solution
This is the most reliable and simplest
in terms of implementation. A special
room is allocated in the arena, which
permanently houses the equipment
and a full-featured workplaces for the
VAR team.
Pros: Reliability and ease of
implementation. Independence from
video streaming, no need for the
video transmission equipment and
expensive dedicated Internet-lines; no
connection losses.
Cons: Equipment needs to be
installed in each stadium. Additional
costs for servers and VOR facilities.
Possible psychological pressure on the
VAR team.
Mobile solution -
VAR Vans and portable sets
Mobile units have all the advantages
of a stationary solution, and at the
same time allows you to transport VAR
equipment between stadiums.
When the lines and cables from the
cameras to the location of the VAR
system are already routed, you just
need to connect to them. If it is not
possible the routing of cables before
every match requires a lot of manual
work and increases the likelihood of
problems
Some Federations and Leagues use a
VAR Van with all the necessary
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In Broadcast - November 2021

Table of Contents for the Digital Edition of In Broadcast - November 2021

Contents
In Broadcast - November 2021 - Intro
In Broadcast - November 2021 - Cover1
In Broadcast - November 2021 - Cover2
In Broadcast - November 2021 - Contents
In Broadcast - November 2021 - 4
In Broadcast - November 2021 - 5
In Broadcast - November 2021 - 6
In Broadcast - November 2021 - 7
In Broadcast - November 2021 - 8
In Broadcast - November 2021 - 9
In Broadcast - November 2021 - 10
In Broadcast - November 2021 - 11
In Broadcast - November 2021 - 12
In Broadcast - November 2021 - 13
In Broadcast - November 2021 - 14
In Broadcast - November 2021 - 15
In Broadcast - November 2021 - 16
In Broadcast - November 2021 - 17
In Broadcast - November 2021 - 18
In Broadcast - November 2021 - 19
In Broadcast - November 2021 - 20
In Broadcast - November 2021 - 21
In Broadcast - November 2021 - 22
In Broadcast - November 2021 - 23
In Broadcast - November 2021 - 24
In Broadcast - November 2021 - 25
In Broadcast - November 2021 - 26
In Broadcast - November 2021 - 27
In Broadcast - November 2021 - 28
In Broadcast - November 2021 - 29
In Broadcast - November 2021 - 30
In Broadcast - November 2021 - 31
In Broadcast - November 2021 - 32
In Broadcast - November 2021 - 33
In Broadcast - November 2021 - 34
In Broadcast - November 2021 - 35
In Broadcast - November 2021 - 36
In Broadcast - November 2021 - 37
In Broadcast - November 2021 - 38
In Broadcast - November 2021 - 39
In Broadcast - November 2021 - 40
In Broadcast - November 2021 - 41
In Broadcast - November 2021 - 42
In Broadcast - November 2021 - 43
In Broadcast - November 2021 - 44
In Broadcast - November 2021 - 45
In Broadcast - November 2021 - 46
In Broadcast - November 2021 - 47
In Broadcast - November 2021 - 48
In Broadcast - November 2021 - 49
In Broadcast - November 2021 - 50
In Broadcast - November 2021 - 51
In Broadcast - November 2021 - 52
In Broadcast - November 2021 - 53
In Broadcast - November 2021 - 54
In Broadcast - November 2021 - 55
In Broadcast - November 2021 - 56
In Broadcast - November 2021 - 57
In Broadcast - November 2021 - 58
In Broadcast - November 2021 - 59
In Broadcast - November 2021 - 60
In Broadcast - November 2021 - 61
In Broadcast - November 2021 - 62
In Broadcast - November 2021 - 63
In Broadcast - November 2021 - 64
In Broadcast - November 2021 - 65
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In Broadcast - November 2021 - 67
In Broadcast - November 2021 - 68
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In Broadcast - November 2021 - 70
In Broadcast - November 2021 - 71
In Broadcast - November 2021 - 72
In Broadcast - November 2021 - 73
In Broadcast - November 2021 - 74
In Broadcast - November 2021 - Cover3
In Broadcast - November 2021 - Cover4
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http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_cabsat2018
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http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201712
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http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOWNYexpo2017
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201709
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_inshowguide2017
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201708
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201707
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201705
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOW2017
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201704
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_cabsat2017
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201703
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http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201701
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_INREVIEW2016
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201612
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201611
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOWNYexpo
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_20110708_DEMO
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201610
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_inshowguide2016
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