This is a broadcast quality format requiring DVD, fast CD-ROM or hard drives for playback.. Fast CPU speeds are alkso required, or a hardware accelerator. MPEG-2 is used for commercial DVDs and most direct to home satellite services (e.g. Sky digital). Standard MPEG-2 is full frame rate (25 fps) and full screen resolution (720 x 576 pixels). The image aspect ratio (4:3, 16:9 or 21:9) is acheived by specifying the horizontal pixel scale factor (e.g. 1.0666 for 4:3).