There are four types of HDTV, although it normally comes down to choose between two, Plasma and LCD. LCD HDTVs are energy and light-efficient. Most of the LCD HDTVs are demonstrating deeper black levels and more interestingly have wider viewing angles and more rapidly response times. On the other hand, Plasma HDTVs are outstanding when it comes to displaying vibrant blacks and soaked colors, as well as precluding motion haze, even though they generally devour more energy, can go through from screen burn-in and can replicate more light.
One of the modes to make a good HDTV comparison is to know the distinction between an HDTV that is Full HD and merely HD Ready. A Full High Definition HDTV is one that has a tuner, which means it is able to get High Definition signals on its own and showing them in full resolution on the screen. In contrast, an HD Ready HDTV is not able to display High Definition signals in full resolution, which can minimize the picture quality. It also does not appear with a tuner so it cannot receive HD signals except you purchase one individually. There are two main types of HDTV tuners, set-top-boxes or external and tuner cards or internal, both of them are very easy to find.
Resolution is also a significant feature when making a HDTV comparison, the most general of which are 720p and 1080p. 1920x1080p is the best available native resolution of 1080p HDTVs. This, ultimately, means that one will get excellent images on his screen, but only if his source is also 1080p, even if, which is at present narrow to Blue-Ray discs and some video games. The best satellite TV providers are beginning to make the transition to broadcasting in only HD; both 720p and 1080p. As a result, 720p HDTVs are even a good choice.
You will be seeing black bars at the top and bottom of the screen when watching a 4:3 show on a widescreen HDTV. One will see black bars at the sides, unless he draws out the image and deform it in the process. You have to mull over what you generally watch, expect to see some black bars from time to time to decide between a 16:9 or 4:3 HDTV.