MPEG-1 was initially designed to deliver near broadcast quality video though a standard speed CD-ROM. Playback of MPEG-1 video requires either a software decoder coupled with a high-end machine, or a hardware decoder. MPEG-2 is the broacast quality video found on DVD's. It requires a hardware decoder (e.g.; a DVD-ROM) for playback. For more information visit the Motion Picture Expert Group at www.crs4.it/~luigi/MPEG.