Cannot this scaling and line doubling be perfectly done by a computer? I've been told it is possible. I don't understand about computers or electronics. I only want to get the best image for a projector and I've been told that a computer is the best choice to scale a DVD source ( or any other ) to the resolution of the projector. Can anyboy explain me what Â¨scaleÂ¨or Â¨doubling imageÂ¨is? Thank you.