the Input i use the normal one i don't the name, maybe cable/antenna.
Some channels are STD, some 480i, some 720P and a few channels are 1080p and 1080i.
1080p and 1080i has a good quality image but samsung still doing better, i don't know why, but this is happening.
The subdivision that i leave already have time warner, so i just plug the tv directly , i don't have the DVR.
But I don't have this problem with my samsung 32" that i got it in 2007 this why i think the tv...