AV Production Desk

AV Production Desk

Monday, 30 July 2012

WYSIWIS - Mobile Video Conferencing


Mobile VC, will it ever catch on?

It will, and all because of seven magic letters. They are WYSIWIS and they mean What You See Is What I See.

This is where a remote team can view what the person at the far end can actually see. In healthcare this can be a trauma team in the hospital viewing what the medics at the scene are viewing to enable early assessments and a better chance of survival, in the industrial workplace this can be a control room operator looking at what the operative on site is looking at and making a better decision as a result.

It is not a case of how we communicate, but why we communicate that determines the best method. A telephone is an improvement on a telegraph because you have true duplex communication without delays, and for most of the time this is all we need. If you think about two people sat in a room talking they don't need to look at each other for the conversation to happen. They only need to see each other when emotion is involved such as during a decision making process (that's a whole different subject) and this is where VC for group meetings is beneficial, it is often why people travel to meet each other face to face. However if all you need to do is order a pizza you don't need to see the other person for the system to work.

Mobile VC has very limited usage if it is been simply promoted so that people can see the person at the other end, most of the time there is no need. Where mobile VC comes into its own is where people need to see what the person on the other end can see. A subtle difference, but a very important one.

Mobile is going to expand the VC market significantly, but only when people fully appreciate WHY it is used.


Tuesday, 12 June 2012

Control Systems

Why would I want one?

AV systems can be as simple as a projector; screen and laptop connection plate but often they involve multiple sources from computers, visual presenters, video conference systems and the like. Associated with these are things such as audio feeds, device controls and switching systems.
In the home environment the selection of sources and control of levels or channel selection is usually taken care of in the TV or with a receiver amplifier. In the AV world there are often quite a few devices in the signal chain that the user never needs to see, but still need to be in the correct state or at the right setting for things to work. This is where the control systems comes into play. Basically the term control system is used to describe the user interface and the ‘brain’ that talks to all the devices.

A simple control system may include a wall plate with buttons for system power, source selection and level controls. Advanced control systems usually include some form of touch screen and links to many devices, often over IP networks for remote administration and monitoring by technicians.

So why would you want one? Basically the aim is to simplify the user experience. It doesn’t really matter how complex a system is, if the user experience is intuitive and the system does what the user expects it to do when they expect it to happen the world is a happy place!

Many people overlook the fact that the purpose of almost any environment equipped with an AV system is to allow users to do something, and that something is often a lot more important than the technology. A teacher may want to show a computer presentation, a sales manager may need to show a spreadsheet or a board of directors my need to have a video conference with an investor. None of these people care much about the technology, however expensive; they just want to get on with what they expected to do. That is why we have control systems, they allow all the complicated things to be hidden behind a simple interface so that people can get on with the task at hand.

As a wise woman once said to me “if I need an instruction book it’s too complicated”, I agree.


examples of AMX Crestron Extron and Neets user interfaces
Typical User Interfaces for Control Systems

Saturday, 9 June 2012

Welcome to the Blog
 
AV System Design - Buying Guides - Product Reviews - Technical Insight

A warm welcome to everyone who has taken time out to visit this blog. Over the course of the next few months, and probably years, I will be adding information on all things Audio Visual. Having spent over half my life in the AV industry (I'm in my forties, what happened!) it's about time I shared some of my experiences, dispelled a few myths and provided a resource for everyone looking at deploying AV systems.
Like everything in life it's not complicated if you know what you're doing. The same rules apply to AV systems, but all too often the truth is hidden behind hype, sales brochures and sometimes even blatant "mistruths". I'm not here on a crusade but I might start a bit of lively debate along the way!
I'm based in the UK but can also be found in Europe, Asia or Canada depending on who is paying the bills.
Thanks for reading, please enjoy.

I do other stuff too!
When I'm not thinking about AV control systems, user interfaces, signal paths and echo cancellation I like to spend my time bouncing off snow covered mountains in Canada waiting for the heli-taxi to turn up. As a CASI-ACMS snowboard instructor I sometimes get to play in the white stuff with my wife and friends.

Must stop before the taxi, not after it!




Rich.