The Difference Between HDTV, EDTV, and SDTV

HDTV in Plain English: "The consumer electronics industry has done a remarkable job spreading confusion about video in general, and HDTV in particular. Time was when you could go to the store and just buy a TV with confidence. You could choose a big one or a little one depending on your room size and budget. But those days are gone. Now we've got DTV, SDTV, EDTV, HDTV, RPTV, DVI, DLP, LCD, LCOS, plasma, progressive scan, component video, S-video, composite video, etc. With all the alphabet soup, it seems only video engineers can buy a projector or TV and know what they are doing. "