Ultra High Defination TV

4k is the new big thing in display tech, and it's coming to a big screen living room TV near you.

Today's 1920 x 1080 resolution Full HD TVs present us with an image of around 2 megapixels, but this new generation of screens delivers an 8 megapixel image from hi-res cameras.

With new Ultra HD 4K TVs arriving this year from the big TV brands, it will soon become a format for both broadcast TV and Blu-ray.

Technically speaking, 4K denotes a very specific display resolution of 4096 x 2160. This is the resolution of all 4K recordings, though many people use 4K to refer to any display resolution that has roughly 4000 horizontal pixels.

Ultra HD TVs have a resolution slightly lower than that - 3840 x 2160. That's exactly four times higher than the full HD resolution of 1920 x 1080.

Many current movie cameras already film above 4K resolutions, for example the RED Epic which can film at a 5K resolution of 5120 x 2700 and the Sony F65 which films at 8192 x 4320 (8K).