How does CD-i Full Motion Video work?
When the term FMV, or Full Motion Video is used, it often refers to the display of MPEG Digital Video. Altough a CD-i player is capable of various full screen animation options and partial screen motion video, it can be extended with a Digital Video cartridge. In some players, this Digital Video cartridge is already built-in. Digital Video is considered a must-have extension to CD-i, and is described as an option in chapter 9 of the Green Book. CD-i Digital Video is based on the MPEG-1 standard, which is now extensively used in a wide variety of applications, but it was initally developed mainly for CD-i. This standard allows CD-i to display full resolution (384×280) moving video images in either 24, 25 or 30 frames per second. The video is not interlaced, like with MPEG-2 used in DVD-Video. Video-quality is roughly comparable to standard VHS. CD-i’s standard ADPCM audio features can be used in conjuction with MPEG video, but this is very unlikely since the Digital Video cartridge also
