At my job we have internal TV screens, with content airing throughout the entire company. This is a fairly new way of internal communications marketing. My group does several projects per month where we make JPGs to be viewed on these screens.
I am however noticing that, the photos especially, look really bad compared to what I see on my mac, no matter how I save these files out.
Does anyone have an idea of how to best export the files?
Should I use a specific NTSC profile or not use JPGs at all? Are PNG/Targa/BMP files better?
sRGB is the correct color profile to use, but there are things you need to do in creating the images if they're going to video. Staying within broadcast standards are the safest way to go, but that's an expensive setup to work with.
For a simple, practical workflow, do this:
Set your black floor to RGB 25/25/25. Don't go below that.
Set your white ceiling to 235/235/235 and don't exceed in any channel.
Set your histogram display to show color channels in color, and use that to check your layout before you save the production file.
That should keep everything within safe limits.