Originally Posted by hdtvbostonma
It seems that 720p broadcasts, for the most part, look better than 1080i.
FOX & ESPN (720p) look better than CBS (1080i).
Interesting, thanks for sharing. At least in my particular situation, my observations have led me to believe the exact opposite. When I watch an NFL game on CBS HD, for example, the picture quality looks stunning to me. It's crystal clear, "three-dimensional," if you will, with minimal edge artifacts. It's a nice, tight picture that makes me weep with joy every time I see it.
However, when I watch Monday Night Football (or tonight's bowl games) on ABC HD, I'm seeing some pretty distracting scaling/deinterlacing artifacts (I'm assuming that's what they are). Still shots look fine for the most part, but even slight motion reveals thick stair-stepping along edges or lines that follow certain angles. "Stair-stepping" may not be quite the right description for what I'm seeing, since it often appears as if edges are being revealed though a slightly offset series of horizontal bars -- hence my assumption that I'm seeing a poor job of scaling (and deinterlacing?) the 720p signal. It's extremely obvious when viewing wide shots of the football field, where certain yard lines are clean and others are not.
I've tried it both ways and got the same results: Forcing the 8300HD to convert to 1080i before sending to the display, and then allowing the 5078 to receive the 720p signal and do its own conversion.
1) Is anyone else seeing the same thing?
2) Is anyone reasonably clear on exactly how the 68/78/88 series sets are converting from 720p to 1080i/p? Is it dropping resolution to 540p first (oh how I hope not, but that's almost what it looks like), then doubling to 1080p? I'm sure the math is not fun, but I would love to know what it's really doing.
3) If both the display and the cable box are unable to do a better job of scaling up from 720p to 1080i, is my only option for improvement to pony up for an external scaler?
I'm sending Time Warner through an SA8300HD -- set to deliver all signals at 1080i -- via component to my HLR-5078. Set is using Movie picture mode, DNIe is turned off, gamma is set to 0, all other SM options have been left untouched. By the way, the problem was just as evident before I made my SM changes. I've self-calibrated as best I could with DVE, and other than the above issue, I'm very happy with the PQ of my Sammy.
Thanks for any insight.