What is HDTV?

There is a lot of confusion and even more misconception when the subject of High definition is raised.

This might be that there are actually a few factors that constitute true high definition and there are 4 main key elements to be aware of that contribute to getting it. There is the contrast ratio, colour saturation and accuracy - so processing speeds are important, and finally resolution.

These 4 elements constitute the optimum in viewing capabilities for TV screens and this can only be achieved using the correct monitor with all 4 capabilities.

For example to have an HD television screen does not mean the signal being viewed is HD quality, nor that if HD channels are being passed through analogue cable to an HD ready screen does it mean an HD quality picture is being viewed.

Typical native resolutions include 1080p and 720p so, on the flip side no matter what resolution the source is sending out from the DVD player or set top box if the incoming source has more pixels than that of the displays native resolution capability you will be getting the visible detail and sharpness being sent out.

Ideally the incoming signal matches the native resolution of the display and this is sent over HDMI cabling so no scaling occurs as the TV should be set to the required aspect ratio or native ratio mode.

There are Audiovideo receivers that can be installed between source and screen that upscale signals to 1080p should the source not match the screens capabilities and although not true HD does make up for the lack of pixels normally lacking with marked improved results.

Much like a bandwidth speed can be 10mb at 150mbps but if the connection is poor or the router out of date you will only get internet speeds up to the slowest part of the connection as a whole.  

Samsung Series 9

Full HDTVs with built-in freesat

Enjoy free HD channels from the BBC and ITV on the ultimate HD BRAVIA® LCD TVs. BRAVIA integrated digital TVs have an in-built DVB-S2 tuner so you can get freesat channels without the need for set-top boxes or cables. BRAVIA freesat TVs are packed with the latest HD picture technology too so you can watch free satellite HD TV as it’s meant to be.

The freesat range and Sony Internet TV – the ultimate subscription-free TV

The Sony W5810, NX803 and Z5800 with built-in freesat you can access over 140 free TV and radio channels, including over 70 hours a week of free HDTV. Freesat is available in most homes which means it is a simple way to switch over to digital TV. As Freesat is satellite based you’ll also be able to receive more HDTV channels as they become available.

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