Updated 2010.12.01.
Why Does My HDTV Have Poor SD Picture Quality?
1. Your HDTV may be a lot larger than your old TV, so it's a bit like putting a magnifying glass to a newspaper. For example, a 50" HDTV is roughly 4 times as large as a 27" TV. Don't sit too close to the TV - recommended minimum viewing distance for SD is roughly 2 times screen size (diagonal measurement).
2. Your HDTV shows a lot more detail than an SDTV and you're seeing all the "poor signal qualities".
3...
FAQ - Why Does My HDTV Have Poor SD Picture Quality? (Mostly for History)
Why Does My HDTV Have Poor SD Picture Quality?
1. Your HDTV may be a lot larger than your old TV, so it's a bit like putting a magnifying glass to a newspaper. For example, a 50" HDTV is roughly 4 times as large as a 27" TV. Don't sit too close to the TV - recommended minimum viewing distance for SD is roughly 2 times screen size (diagonal measurement).
2. Your HDTV shows a lot more detail than an SDTV and you're seeing all the "poor signal qualities".
3...
FAQ - Why Does My HDTV Have Poor SD Picture Quality? (Mostly for History)