Thank you for confirming.
On dvd, that is normal, because movies are in a different format and always will have those bars. You can adjust it differently but that either cuts off part of the picture or stretches it and then things look out of proportion.
For the satellite,
Grab the box remote and look for a button that says ZOOM, ASPECT, WIDE, RATIO, SIZE, etc
You may need to press this several times to cycle through the different options,
and you may have to make a similar adjustment on the tv as well, until you get them both to a desired setting
typically you'd want the box set on 16:9 or Wide
and you'd want the tv set on Normal or 16:9
It can take a bit of fiddling to get them both matched up, but you should have a button for this function on both the tv remote and on the box remote, and will have to use both