High Definition
This is the new revolution in TV broadcasting, delivering ultra-clear pictures to your home. Or it will do when fully rolled out in the not-too-distant future. Better make sure you're ready for it!
What is High Definition?
High Definition TV (HDTV) creates images that are up to four times clearer, better, brighter than we are used to. HD images are delivered by having up to twice the number of vertical scanning lines per frame than normal TV - 1080 instead of 576.
When?
High Definition broadcasting is still at the trial stage, but TV companies are already using it - recording programmes in it, if not actually broadcasting in it. It will become increasingly prevalent, as more customers switch to TVs that can receive HD images.
Can I get HD on my TV?
Not unless you have bought a TV that is built to specifications called 'HD-ready'. These days, most large TVs are manufactured as HD-ready, but check that this is specified. Note that you will only get the benefit of HDTV on televisions with a relatively large visible screen size of 26" (26 inches) or larger. If you have a normal, non-HD-ready TV, you will be able to receive HDTV broadcasts, but they won't look any different to ordinary TV pictures. You have to have an HD-ready TV to get the benefit of High Definition broadcasts.
Satellite and cable only
Initially, HDTV will only be available through satellite and cable services. Freeview digital TV is not yet geared to deliver HDTV, but this is likely to change in the near future, as digital TV takes over from analogue (between 2008 and 2012). See the separate article Digital, Satellite and Cable.
