Originally Posted by ddimberio
Nick also told me that the 1280x720p setting may very well give me a better picture than the 1920x1080i - but I guess I'll be the judge of that as soon as I can get a 1080i image (via new software) to the display from the Anthem. Does that make sense to you guys? Why would the 720p maybe look better than the 1080i?
A 1080p display that only accepts a 1080i input has to "de-interlace" the 1080i into 1080p. Generally speaking, such TVs do this using a simple method that is not all that great. Now you are unlikely to notice any glaring problems because the resolution is so high that the artifacts are much smaller than is the case, for example, when standard TV at 480i is poorly de-interlaced into 480p. But the artifacts still exist.
The Anthem uses a much more sophisticated method of de-interlacing. Thus if you send 720p to your TV the TV will not have to de-interlace it since the Anthem has already done that, although it WILL have to "scale" it up to 1080p. So the issue is whether the quality of your TV's scaling is good enough that it is better to send it 720p to avoid any potential problems in its de-interlacing.
It's really hard to tell in advance which will work better for you. Such TVs are usually optimized in other ways for a 1080i signal since that's how they are most commonly judged by buyers in stores. In other words, if the engineers have to cut corners somewhere to keep the price down they will damage the way other resolutions are handled before they damage 1080i input. So that might turn the tide all by itself to preferring 1080i.
Your best bet is probably to go to the appropriate display forum here and find a thread for your TV, or just start a new thread and see if any of the people there have experience with your TV. Mention that you are feeding the TV with a top quality de-interlacing and scaling solution -- the Gennum VXP stuff in the Anthem -- so the real issue is which signal your TV will handle better.
And of course once you get your Anthem fixed, you can just try it yourself. Be sure you calibrate your TV separately for 720p and for 1080i as the "best" settings may differ between them and you can't really judge quality unless you know both ways are calibrated the same way.