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15August

Revolutionary Lecturing Technology

By Abrie du Plooy

Revolutionary Lecturing Technology
Never again will a lecturer or presenter have to turn their backs to their audience. We all remember how learning and presenting methods developed from chalkboards to projection, laser pointer

Posted in AV News

04July

Why you should never transport LCD screens horizontally

By Abrie du Plooy

Why you should never transport LCD screens horizontally
As the product manager for ProSpectre Professional Displays at Electrosonic and during the many years prior to, working with other brands, I have witnessed on numerous occasions how LCD screens are transported horizontally and not vertically.

Even though there are big upward facing arrow markings on the packaging to indicate the correct handling, it is often ignored.

Posted in AV News

04July

Basics of video and various types of display technologies

By Abrie du Plooy

Basics of video and various types of display technologies

The earliest colour CRT (Cathode Ray Tubes) televisions used technology where primary-coloured electrons were fired at a phosphor coated surface. The charged electrons would energize the phosphor which then emitted the desired colour.

These days, with digital signals and much more signal information, pixels are created by using various different technologies in order to display an image. 

Posted in AV News

04July

Video Conferencing in the ‘20s

By Abrie du Plooy

Video Conferencing in the ‘20s

The term Video Conferencing has been a scary word to consumers for many years and more often than not, even the odd technician. Conventional systems required quite a few individual pieces of hardware, operating in concert to provide a functional solution.

These components would be; a hardware codec to handle all the processing, PTZ (Pan Tilt Zoom) camera to capture video, boundary or ceiling microphones to record voice, an amplifier and speakers to reproduce the incoming audio, an echo-cancellation system for users not to hear themselves, single or dual display screens for the actual video

Posted in AV News

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