I know HD is all the rave at the moment but i want to clear a few things up.
You will not get HD off a standard TV signal, standard SKY or NTL receiver or a standard DVD player for that matter. Some HDTVs come with built-in tuners, while others do not. The tuner converts the signal into something that your TV can recognize. HDTVs that do not come with a tuner are commonly called "HDTV Ready." A HDTV without a tuner is worthless.There was a big legal fight between Consumer Electronics Association (CEA) and the FCC about including tuners in all HDTVs. The FCC wanted tuners to be included, while the CEA did not. FCC reasoned that the including tuners would increase adoption of HDTV. The CEA said that tuners are only for people who want to receive signals via antenna and is worthless for people who want to use external HD tuners like SKY's HD receiver. Another reason that the CEA argued against including tuners into HDTVs is that it would drive up the costs of manufacturing the HDTV. It looks like the FCC won, and as of July 2004 HDTVs with screens of 36 inches or more must be sold with a tuner included. Smaller sizes will be phased in over the next three years.
There are a few different levels of HD. These are 480p 720p 1080i and 1080p.The "p" means progressive and "i" mean interlaced. In both resolutions, every second has 60 frames of video. Progressive resolution puts 60 full frames on the screen every second. Interlaced resolution puts 30 frames of only odd lines and then 30 frames of only even lines up every second. Which resolution is better? Beauty is in the eye of the beholder, and future battles may be fought over this question. Some people like the slightly more "stable" picture of 720p, while others prefer the greater resolution of 1080i. The best way to figure this out is to run down to your local TV store and see for yourself. With newer HDTV's now supporting 1080p we are now entering the realm of expensive but incredibly clear resolutions.
How can i get true HDTV? Unfortunately were not as advanced as places like america and japan so our options are slightly limited and expensive. Here they are:
Pioneers PDP-5000EX 50" Plasma that supports 1080p - £5779.95
Sky HD- £299(for the box) + £10 per month extra subscription
Samsung BD-P1000 Blu-ray Player- £394
or you could kill 2 birds with one stone
Microsoft Xbox360 with HD-DVD player (released Nov 17th) approx £300 for premium
Im not an expert but i have done some research so if you have any questions or you disagree post here, i will help as much as possible.