Well I know that this zone isnt reproduced on a TV about 10% of the whole picture.
I'm not enlarging the zone I'm resizing the movie on a black frame. So I'm making the movie smaller on a black frame 720x576 (DVD size). That way I'm able to see the whole picture but my question is : would it make it sharper?
If you are reducing it down in size and having a black frame border...it may appear sharper (apparent sharpness) but it certainly does not gain any detail by doing so.