HD Technology

HD Video Technology

HD Video (High Definition) is the single most important development in the audiovisual world since black and white television moved over to colour in 1967. Once people see just how good true HD is they will not settle for anything less – it’s truly amazing!

It is therefore vital that any business investment for integrated audiovisual systems should allow for this technology; either at the outset or with a view for it to be added retrospectively as funds allow.  HD systems need an infrastructure capable of delivering digital signals and high bandwidth and since HD is by default WIDESCREEN, any projectors and projector screens should adopt this format (gone are the days where the old standard 4:3 aspect ratio screens should be installed, but for some reason we still see new ones appearing in some installations - much to our surprise). Further, as HD becomes the norm for the living room, so it will be expected more and more within the business environment.

AvexiA provide the following HD solutions and services:

  • HD Video Conferencing - Learn More
  • HD Plasma Screens (Professional and Consumer Grades) - Learn More
  • HD LCD Screens (Professional and Consumer Grades) - Learn More
  • HD Projectors - Learn More
  • 4K Projectors (Essentially 4x HD projectors inside ONE projector)
  • HD Signal Distribution (analogue and digital)
  • HD Signal Switching
  • HD Video Streaming and Archiving - Learn More
  • HD TV Distribution
  • Blue Ray DVD Players
  • HD Video Production - Learn More
  • HD Equipment Hire - Learn More


What is 'True HD' or 'Full HD' and what are the main connection types for the new HD digital signals?

'True HD' (sometimes also called 'Full HD') digital display devices have the ability to display a ‘native’ resolution of; 1920 x 1080 pixels in a ‘progressive’ format (hence the term often seen: 1080P). These 'true HD' displays must also be compliant with HDCP signals (High Definition Content Protection). The most common form of connector is HDMI (generally for non 'professional' products), this allows HD digital video, audio and control to pass through a single connector, DVI (used mainly for professional products) and DisplayPort. DVI does not facilitate audio and control. However, both HDMI and DVI use the same format (TMDS) and can therefore be linked to each other. DisplayPort video signals are not compatible with DVI or HDMI although both can pass through a DisplayPort connector. HD-SDI is also available for HD signal distribution but mainly on broadcast equipment. It should be noted that 'professional' HD video products will often use a resolution higher than 1920 x 1080P (1920 x 1200P being the most common), this is for compatibility with modern PC graphics cards.