All my TV’s pre-HDTV worked 20 years plus. Last night our first HDTV faded, in making sense of what to replace it with I copied this info, which most are ignorant including myself. Seems we consumers are being fleeced by the confusion.
HDTV formats as adopted by the Advanced Television Systems Committee (ATSC), based on 720p, 1080i, and 1080p, using refresh rates that vary between 24Hz and 60Hz. The basic difference between these HDTV formats is mainly one of image resolution.
The only commercially available 1080p content comes in the form of high-definition discs from Blu-ray and the few satellite TV services.
There is little chance broadcasters will jump to 1080p any time soon due to bandwidth limitations.
The only way to enjoy true 1080p HDTV commercially available content apart from hooking a PC to your HDTV set is a Blu-ray disc.
1080i and 720p
Because our TV world is based around 60Hz, and because there’s a limit to how much resolution could be transmitted over the air (because of bandwidth and MPEG compression), the two main HDTV resolutions are 1080i and 720p.
720p is 1,280×720 pixels, running at 60 frames per second (fps). This is the format used by ABC, Fox, ESPN ( fast motion looks better at 60fps).
The 1080i designation is 1,920×1,080 pixels, running at 30 frames per second. This is what CBS, NBC, and just about every other broadcaster uses.