Here's a decent video that shows a setup of a ADJ AV6
System. I'm not necessarily endorsing the product however the concepts are pretty much universal. Every panel is a little different. Some are low
profile with no handles or displays while others have
LED Displays,
foot steps and rigging points for you to climb on. But the basic idea is pretty much there.
Media Servers can be vastly different in their setup from a PC running something like Resolume
Arena to a Green Hippo Hippotizer but in essence it's just the source of the video.
you than have the
processor or controller that maps the walls, these can be stand alone units (should be in my opinion) or some are built into the media servers such as C3's custom solutions.
Pixel size in a very general statement refers to the resolution of the video. Most walls I use,
pixel size doesn't matter because I
send 720p to the wall. The more pixels the higher the resolution, the sharper the
image, and the more expensive. Personally unless there's a lot of text being displayed or it's a small wall that you have close to your audience I think it's a waste, again that's my opinion and I get a lot of flak for that. I come from the perspective that I don't want to count eye lashes on
IMAG.
A couple good books:
Media Design and Technology for Live Entertainment: Essential Tools for Video Presentation 1st Edition by Davin Gaddy
https://www.amazon.com/dp/1138216216/?tag=controlbooth-20
Media Servers for Lighting Programmers: A Comprehensive Guide to Working with Digital Lighting 1st Edition by Vickie Claiborne
https://www.amazon.com/dp/041572189X/?tag=controlbooth-20
As far as books on video production goes, you might want to conciser going to a nearby public universities
book store.
I have found some of the stuff written by the instructors to incredibly valuable however they don't sell them outside of the facility.
I do agree that nothing beats
practical experience, so if you have some free time, try volunteering for setup at a concert. Even if you don't stay for the concert or don't particularly care for the music, the hands on experience is worth it.
https://loopevents.org/volunteer-now/
https://www.premierproductions.com/volunteer
or contact the production company of whatever tour you want to help out with.
Some local event and rental companies will also allow you to volunteer if you're willing to sign a hold harmless waiver.