When is the Dolby made?



Hey! I might be stupid, but I just to be honest. I never got that idea of the Dolby thing.

If I want to make a film whetever with Dolby Digital or Dolby Surround what do I need to do. Is there anything I have to do in the shooting process (except high quality sound like DAT, MiniDisc or XLR2Camera), or will I do the whole Dolby process in post? Of course I know there is different between Surround and just digital, but beyond the aspects of all this...what is really the dolby thing about? Its just a proove of sound quality into the film right? So what do I need to do when I want Dolby in my films? There is lots of rules and regulations for this right, pluss al the tech.

Hope for an answer :D and thanks!