I am pretty sure that you cannot get a true High Def picture using a Coax, but I just got done installing a Samsung 23 inch LCD and I can't seem to see the difference. My Dad had Comcast come out and install the HD Box, and they connected it using a Coax. Well, I told my dad that you can only recieve a true HD picture with Components or DVD(or HDMI). He disagreed, and we argued. So went out and bought a component and set it up through the TV menu. I am at this point baffled because I can't see a noticable difference. What am I missing here, am I wrong???