Originally Posted by Clark Burk
What is the setting to use for 1:1 pixel mapping with no change to the source aspect ratio?
There isn't one for all sources, unless your source devices are set correctly.
"FULL" will take whatever signal it gets and fill the screen with it. This is great for 16:9 sources (including anamorphic DVDs), but stretches 4:3 horizontally.
"JUST" and "H-FILL" always distort, so you never want to use those. Both take just the 4:3 portion of the signal as the "source", with "JUST" doing a non-linear version of "FULL". "H-FILL" is the same as "FULL" if the source is 4:3, which is why it isn't available unless the source is 16:9.
"4:3" would be needed if you have a 4:3 input signal, which means that devices like cable boxes would have to be set to send 4:3 when on an SD channel. It adds sidebars to all sources (for 16:9 sources, the sidebars cover part of the picture) and zooms a very tiny bit to remove the junk at the top/bottom. If your devices always send a 16:9 signal with sidebars for SD, you wouldn't ever need
this one, although you might want it for the junk removal.
"ZOOM" is only useful for non-anamorphic DVDs or letterboxed SD content. It takes the 16:9 area out of the 4:3 area of the source and zooms it. It can end up looking pretty bad, so avoiding such sources is a better choice.
So, set your devices to send 16:9, and set the TV to "FULL", and then you only have to change to "ZOOM" for letterboxed SD material, or maybe "4:3" to mask junk at the top.
Originally Posted by mvc753
You seem to be referring to how the various aspect settings handle 4:3 content. I'm referring to how they handle native 16:9 1080i and 1080p content. JUST takes 16:9 content and stretches it rather than displaying it properly.
That's because they are all designed to deal with 4:3 content on a 16:9 screen (or in a 16:9 signal), as you can see from my descriptions above.
Also note that the TV remembers the "Aspect Adjustment" for each combination of inputs and source signal type. So, if you have your STB set to output "native", you can set "FULL" when on an HD channel and "4:3" for an SD channel, and it will remember it, so you never have to set them again for whatever input your STB is connected to.