I found a nice (albeit incomplete) glossary of audio-video terms at AfterDawn.com which explained the stuff I see when HDTV is discussed. It's even better when you combine that with The Difference Between HDTV, EDTV, and SDTV by Evan Powell, ProjectorCentral, October 2, 2003
Here are the common HDTV (High Definition Television) resolutions:
1080i : 1920x1080 interlaced
720i : 1280x720 interlaced
720p : 1280x720 progressive
EDTV (Enhanced Definition Television)
480p (aka 525p) : 640 x 480 progressive
SDTV (Standard Definition Television .. aka the stuff we all grew up with)
480i (aka 525i) : 640x480 interlaced
While I'm thinking about it, I am commonly amused at how marketing stumbles when they go for the next technology leap. I'm surprised there wasn't a Super Definition TV in the list. And what will come after HDTV? Probably UDTV (ultra definition TV) then SUTV (super ultra definition) then ... (queue sound of Gene Bob being dragged away in a straight jacket).
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