About 99% of movies form HD DVD or BD have black bars on a 16:9 tv and are not full screen. Why is it that most of the same movies on HBO HD, Showtime HD or Starz HD are transmitted on the full 16:9 screen? No black bars. Which aspect ratio would fill a 16:9 screen. I don't like the black bars on my screen. I thought that HD would cover the whole screen.