What video codecs does the HD DVD-Video format support?
Even a single hour of high definition video can occupy hundreds of gigabytes of space. To allow a serviceable amount of material to fit on a single HD DVD-Video disc, video is compressed using one of three codecs: MPEG-2, MPEG-4 AVC or VC-1. Though the choice of scheme is made while encoding the source material, before or while authoring the disc, every HD DVD-Video playback device is designed to decode all three codecs (see chart).