Westinghouse Lcd I Have A Westinghouse LCD TV And The Screen Does Not Fill Up The Entire TV Screen, Help Please?

I have a Westinghouse LCD TV and the screen does not fill up the entire TV screen, help please? - westinghouse lcd

In the menu on the TV screen, there are three options, Standard, not to fill the screen. Then there's padding, it does not fill the screen, stretching and distorting the image and zooming in excess. I have a cable box that had only one cable from the wall. So, when I am on my Xbox 360, it does not fill the screen. I lost the box, but I'm pretty sure that its 23-inch TV