Content deleted Content added
Tag: Reverted |
→top: Altered template type. |
||
| (20 intermediate revisions by 15 users not shown) | |||
Line 2:
[[File:Channel 1 Israel DSC0193.jpg|thumb|A video wall in television studio]]
A '''video wall''' is a special [[multi-monitor]] setup that consists of multiple [[computer monitor]]s, [[video projector]]s, or [[television set]]s tiled together contiguously or overlapped in order to form one large screen. Typical display technologies include [[Liquid crystal display|LCD panels]], [[LED displays|Direct View LED arrays]], blended projection screens, [[Laser-powered phosphor display|Laser Phosphor Displays]], and [[Rear-projection television|rear projection cubes]]. [[Jumbotron]] technology was also previously used. [[Diamond Vision]] was historically similar to Jumbotron in that they both used [[cathode-ray tube]] (CRT) technology, but with slight differences between the two. Early Diamond vision displays used separate flood gun CRTs, one per subpixel. Later Diamond vision displays and all Jumbotrons used field-replaceable modules containing several flood gun CRTs each, one per subpixel, that had common connections shared across all CRTs in a module; the module was connected through a single weather-sealed connector.<ref>{{cite web | url=https://www.mitsubishielectric.com/sites/news/2018/pdf/0308.pdf | title=Mitsubishi Electric Receives IEEE Milestone for Outdoor Large-Scale Color Display System | access-date=2023-12-28}}</ref><ref>{{Cite
Screens specifically designed for use in video walls usually have narrow [[wikt:bezel#Noun|bezels]] in order to minimize the gap between active display areas, and are built with long-term serviceability in mind.<ref name=pixell>{{Cite web |url=http://www.pixell.com/what_is_a_vw.htm |title=What is a Video Wall? |access-date=2011-01-31}}</ref> Such screens often contain the hardware necessary to stack similar screens together, along with connections to [[Daisy chain (electrical engineering)|daisy chain]] power, video, and command signals between screens.<ref>{{Cite web |url=http://www.pixell.com/margay_ii.htm |title=Clarity Margay II Specifications |access-date=2011-01-31}}</ref> A command signal may, for example, power all screens in the video wall on or off, or calibrate the brightness of a single screen after bulb replacement (in Projection-based screens).
Line 18 ⟶ 10:
Video walls are sometimes found in [[control room]]s, [[stadium]]s, and other large public venues. Examples include the video wall in [[Oakland International Airport|Oakland International Airport's]] [[baggage claim]],<ref>{{cite news|url=http://www.oaklandairport.com/pdf/travel_planner/september_october_2006.pdf|title=Terminal 2 Baggage Claim Building Opens In July|date=2006|work=Oakland International Travel Planner|access-date=2017-12-05|publisher=[[Port of Oakland]]|pages=12|quote=An 8-foot by 21-foot video wall featuring finished works by local artists commissioned by the Port of Oakland}}</ref> where patrons are expected to observe the display at long distances, and the 100 screen video wall at [[McCarran International Airport]], which serves as an advertising platform for the 40 million passengers passing through airport annually.<ref>{{cite web |url=https://www.cinemassive.com/video-wall-solutions/digital-signage-video-wall/case-studies/las-vegas-100-screen-video-wall/ |title=Las Vegas Airport 100 Screen Video Wall | publisher=CineMassive | access-date=2015-05-14}}</ref> Video walls can also benefit smaller venues when patrons may view the screens both up close and at a distance, respectively necessitating both high pixel density and large size. For example, the 100-inch video wall located in the main lobby of the [[Lafayette Library and Learning Center]] has enough size for the distant passerby to view photos while also providing the nearby observer enough resolution to read about upcoming events.<ref>{{Cite web |url=http://www.lafayettelib.org/library/mediaWall.html |title=Living Media Wall |access-date=2011-01-31}}</ref>
Simple video walls can be driven from [[multi-monitor]] video cards, however more complex arrangements may require specialized video processors, specifically designed to manage and drive large video walls.<ref name=pixell/> Software-based video wall technology that uses ordinary PCs, displays and networking equipment can also be used for video wall deployments.<ref name=informationweek>{{Cite web |url=http://www.informationweek.com/news/hardware/peripherals/showArticle.jhtml?articleID=212902015 |title=Startup of the Week: Hiperwall }}</ref><ref>[https://digitaldirectoryexpress.com/ Digitaldirectoryexpress]</ref>
The largest video wall as of 2013
Video walls are not limited to a single purpose but are now being used in dozens of different applications.
==Controllers==
[[Image:LivingMediaWall.jpeg|thumb|Rear projection displays with narrow mullions.]]
Line 43 ⟶ 36:
The integrated video wall scalers are often limited to matrix grid layouts (e.g., 2x2, 3x3, 4x4, etc.) of identical displays. Here the aspect ratio remains the same but the source-image is scaled across the number of displays in the matrix. More advanced controllers enable grid layouts of any configuration (e.g., 1x5, 2x8, etc.) where the aspect ratio of the video wall can be very different from that of individual displays. Others enable displays to be placed anywhere within the canvas, but are limited to portrait or landscape orientation. [[Artistic video wall|The most advanced video wall controllers enable full artistic control of the displays]], enabling a heterogeneous mix of different displays as well as 360deg multi-angle rotation of any individual display within the video wall canvas.
===Multiple
Advanced video wall controllers will allow you to output multiple sources to groups of displays within the video wall and change these zones at will even during live playback.
The more basic scalers only allow you to output a single source to the entire video wall.
Line 50 ⟶ 43:
Some video wall controllers can reside in the server room and communicate with their "graphics cards" over the network. This configuration offers advantages in terms of flexibility. Often this is achieved via a traditional video wall controller (with multiple graphics cards) in the server room with a "sender" device attached to each graphics output and a "receiver" attached to each display. These sender/receiver devices are either via Cat5e/Cat6 cable extension or via a more flexible and powerful "video over IP" that can be routed through traditional network switches. Even more advanced is a pure network video wall where the server does not require any video cards and communicates directly over the network with the receiver devices.<ref name=digitalsignagetoday>{{Cite web |url=http://www.digitalsignagetoday.com/articles/rise-of-the-network-video-wall/ |title=Rise of the Network Video Wall |date=2 June 2015 }}</ref>
Windows-based Network video walls are the most common in the market and will allow a much better functionality.<ref name=ravpub2017>{{Cite web|url=https://www.ravepubs.com/rave-video/ise-2017-monitorsanywhere-shows-off-network-video-walls/|title=ISE 2017: MonitorsAnyWhere Shows Off Network Video Walls
A network configuration allows video walls to be synchronized with individual digital signs. This means that video walls of different sizes and configurations, as well as individual digital displays
Line 64 ⟶ 57:
==See also==
{{commonscat|Video walls}}
* [[Multi-image]]
* [[Multi-monitor]]
Line 73 ⟶ 67:
[[Category:Multi-monitor]]
[[Category:
[[Category:Video hardware]]
[[Category:User interfaces]]
| |||