Surveillance Video Wall Guide

By: Brian Rhodes, Published on Oct 01, 2013

Relic, Eye Candy, or Critical? All three labels may describe surveillance videowalls - vast arrays of monitors used to display hundreds of camera outputs and other security information. They provide an efficient way to display video for large groups of people. However, the numbers of end users adopting traditional video walls is shrinking. Are they finding smarter ways to display video, or are they giving up a critical tool? In this note, we take a look at videowalls and find out.

Traditional Videowall Design

The design of videowalls changed significantly when cameras moved to IP from analog. In the analog heyday of videowalls, the sheer amount of videowall hardware was staggering - matrix switches, loop output pickups, controller cards, and joysticks were all necessary - even before considering the CRT displays. Analog videowall systems were big efforts in manually integration, where dipswitch configuration and jumper blocks took the place of 'modern' software based systems.

With the development of networked video, videowall systems have also migrated. Modern systems have simplified hardware designs - often consisting of three major components:

  • Video wall Controller Servers, with software
  • An array or bank of Display Panels
  • Cabling, usually DVI-I/D format

Controllers: These server-like boxes contain the hardware/software used to drive video to display monitors. Unlike earlier generations of equipment composed of hundreds of different devices, switches, and power supplies, a 'modern' video wall system looks much like a VMS installation. However, rather than accepting inputs from many cameras, a digital video wall delivers outputs to many displays. The backside of a controller closely resembles a server - containing ethernet ports, serial connectors, and many video output ports:

Supported Inputs: Videowall Controllers accept inputs from a broad variety of devices and systems, including:

Many videowall systems include digital encoders and video reprocessors onboard in order to display video streams from SCADA systems, Industrial Control platforms, GIS platforms, access control, etc.

Controller Performance: Like a VMS server, a videowall controller is sized based on video throughput. Final configuration of a videowall system depends on the type and number of streams to be displayed. In general, controller hardware aims to display megapixel resolutions at full frame rates with no artifacts or quality loss. For a large bank of display monitors, the performance of a purpose built videowall controller exceeds a handful of workstation computers dedicated for the same purpose.

Get Notified of Video Surveillance Breaking News
Get Notified of Video Surveillance Breaking News

Displays: While using standard consumer-grade HDTVs is common for videowalls, videowall manufacturers recommend using purpose-built displays. In addition to having a thin bezel (or frame), the display components are designed with a higher MTBF than standard consumer displays. Videowalls are designed to operate 24/7/365 without experiencing burn-in or losing color fidelity. The image below shows a videowall display panel - note the display glass extends to the edge of the panel, allowing for an uninterrupted picture to span more than one panel:

VMS Displays Good Enough for Most Users

Since many do not need display walls to span across panels, users frequently forego purchasing a specific subsystem, and use VMS software [link no longer available] and aftermarket video cards to display outputs on multiple monitors.

A VMS-based videowall may not have the deep configuration features of a traditional videowall, but the core and most critical functions are present. Especially with maps becoming a prevalent feature within VMSes, and added integration of companion security systems (access control, fire/burglar alarms), the ability to organize the information within a single interface over a modest number of screens is 'good enough' for many users:

However, VMS based solutions cannot always replace traditional systems. Especially when non-standard video inputs need to be displayed, when the video wall is larger than a few panels, or if hundreds of cameras need to be displayed at once, then a traditional video wall system is required simply based on the limited resources of workstation hardware.

Sign of the Times

Because a traditional videowall represents more hardware, special displays, and specialty configuration labor, it is several times more costly than using a VMS based solution with consumer displays.

The effect of VMS based solutions is so pronounced on the video wall business, few traditional manufacturers claim surveillance as a core market. This impact has been catalyzed with the transition of video surveillance displays from CRT TV-style monitors to large consumer-grade display panels. Even when traditional videowalls provide a better performing result, the willingness to purchase extra equipment is low, and many opt for a less expensive VMS based solution.

Are Videowalls Critical?

Aside from the changes in how videowalls are designed, their usefulness for modern surveillance has been questioned. Unlike analog systems that do not take advantage of networked workstations, it no longer is cost prohibitive to bring video directly to an operator's desk. Being able to stream video from multiple cameras to several users at once is neither difficult nor expensive with a networked video system.

In our informal LinkedIn poll, a majority of responses [link no longer available] describe that videowalls are 'seldom' to 'never' part of their system designs, and several end users admit the main benefit to having a videowall is that 'it looks cool' and 'makes the shareholders happy during walk-through', but having the system may not enhance overall security effectiveness.

Niche: Command Centers

Videowalls continue to have strong demand in specialized applications, including public safety, transportation, casinos, and law enforcement/military applications. In general, these applications are large scale and represent big projects built to support many operators.

DIY options

In general, using a prebuilt videowall controller will cost $10,000 - $15,000 more than building your own out of a workstation and aftermarket videocards. Additionally, thin bezel videowall display panels will cost 30% to 100% more than equivalent consumer-grade displays.

Considering that the total videowall price represents the salary of several full-time guards, unless a security operation considers communal visibility of video critical to monitoring and response, the added cost of a videowall may have a hard time being justified.

Comments (6) : Members only. Login. or Join.

Related Reports

ONVIF Video Surveillance Tutorial on Jan 29, 2019
ONVIF is well known within the surveillance industry as an interface to connect IP cameras and VMS systems. However, new users may find it...
2020 Camera Book Released on Jan 10, 2020
This is the best, most comprehensive security camera training in the world, based on our unprecedented testing. Now, all IPVM PRO Members can get...
2020 IP Networking Book Released on Jan 06, 2020
The new IP Networking Book 2020 is a 280 page in-depth guide that teaches you how IT and telecom technologies impact modern security systems,...
Dahua Intercom Tested on Feb 07, 2019
Video intercoms are a growing market with video surveillance manufacturers expanding into this niche. IPVM is continuing its series of video...
ONVIF Favorability Results 2019 on Mar 15, 2019
In the past decade, ONVIF has grown from a reaction to the outside Cisco-lead PSIA challenge, to being the de facto video surveillance standard...
Manufacturer Favorability Guide 2019 on Jun 12, 2019
The 259 page PDF guide may be downloaded inside by all IPVM members. It includes our manufacturer favorability rankings and individual...
Exacq Remote Cloud Access Tested on Jun 20, 2019
Remote cloud access has been missing from most VMSes (including Exacq and Milestone). Now, Exacq, after releasing Cloud Drive Storage earlier in...
Network Optix / Hanwha Cloud Access Tested on Jul 02, 2019
Remote cloud access is becoming a bigger differentiator, as cybersecurity issues underscore the problems of port forwarding and many integrators...
ZK Teco Atlas Access Control Tested on Aug 20, 2019
Who needs access specialists? China-based ZKTeco claims its newest access panel 'makes it very easy for anyone to learn and install access control...
Camera Calculator V3.1 Release Improves User Experience on Oct 17, 2019
IPVM has released a new version of our Camera Calculator, V3.1, with significant user experience improvements, a new development plan, and an...

Most Recent Industry Reports

Every VMS Will Become a VSaaS on Feb 21, 2020
VMS is ending. Soon every VMS will be a VSaaS. Competitive dynamics will be redrawn. What does this mean? VMS Historically...
Video Surveillance 101 Course - Last Chance on Feb 20, 2020
This is the last chance to join IPVM's first Video Surveillance 101 course, designed to help those new to the industry to quickly understand the...
Vulnerability Directory For Access Credentials on Feb 20, 2020
Knowing which access credentials are insecure can be difficult to see, especially because most look and feel the same. Even insecure 125 kHz...
AI/Smart Camera Tutorial on Feb 20, 2020
Cameras with video analytics, sometimes called 'Smart' camera or 'AI' cameras, etc. are one of the most promising growth areas of video...
China Manufacturer Suffers Coronavirus Scare on Feb 20, 2020
Uniview suffered a significant health scare last week after one of its employees reported a fever and initially tested positive for coronavirus....
Cheap Camera Problems at Night on Feb 19, 2020
Cheap cameras generally have problems at night, despite the common perception that integrated IR makes cameras mostly the same, according to new...
Milestone Launches Multiple Cloud Solutions on Feb 18, 2020
Milestone is going to the cloud, becoming one of the last prominent VMSes to do so. Milestone is clearly late but how competitive do these new...
Video Surveillance Architecture 101 on Feb 18, 2020
Video surveillance can be designed and deployed in a number of ways. This 101 examines the most common options and architectures used in...
UK Stands Behind Hikvision But Controversy Continues on Feb 18, 2020
Hikvision is exhibiting at a UK government conference for law enforcement, provoking controversy from the press, politicians, and activists due to...
IronYun AI Analytics Tested on Feb 17, 2020
Taiwan startup IronYun has raised tens of millions for its "mission to be the leading Artificial Intelligence, big data video software as a service...