What is a hybrid disc?
All DVD’s contain 3 zones: the video zone, audio zone and ROM zone. A DVD-V uses most of the disc for the video zone, a DVD-A uses most of it for audio, and the ROM zone is used for data just like a CD-ROM. A hybrid disc is one that contains the same program (although encoded differently) on both the video and audio zones. The ROM zone may be added to either type of disc (or used alone) for access to data when used on a computer.