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 Mar 30, 2005 - 02:00 PM - by Michael
* What the heck is SDTV?

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PC Games/Hardware/Microsoft
DesignTechnica's got a talkback today taking users through the "middle road" of TV resolutions: what the heck is SDTV?

What is SDTV? For starters, it?s a necessary euphemism. To the founding fathers of DTV, looking to name a lower-resolution format, ?standard definition? sounded more appetizing than ?low definition? or ?sour-milk definition.?

Nonetheless, SDTV is very much a part of the ATSC?s official DTV specs. It?s a format with 480 vertical pixels, and 640-704 horizontal pixels (the latter for widescreen.) It can use either interlaced scanning, which delivers each frame as a pair of gap-toothed fields, or progressive scanning, which delivers computer-monitor-like full frames.
If you've ever wondered what the difference in all those "lower" resolutions is, this is a great time to learn.

Especially this little nugget:

Actually, under the definition commonly accepted by the Consumer Electronics Association, and therefore most DTV makers, SDTV uses interlaced scanning, while EDTV (enhanced-definition television) uses progressive scanning. Using that parlance, progressive-scan DVD (480p) is an EDTV signal source, while regular interlaced DVD (480i) is SDTV.

HDTV, simply put, delivers more pixels. The 1080i format (used by tube-based rear-projectors as well as CBS and NBC) provides 1080 by 1920 pixels with interlaced scanning, while 720p (a player in LCD and plasma displays?and at Fox and ABC) provides 720 by 1280 with progressive scanning.
Okay, that does it.

I need a DVD player that does 720p already.


 

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