What is a dual-layer disc ?
Dual layer DVD technology is commonly called DVD9 to indicate its approximate 9-GB storage capacity. Hollywood has been producing major motion pictures on stamped dual layer DVD discs for years. Dual layer DVD recordable discs offer up to four hours of high quality MPEG-2 video, or up to 8.5 GBytes of data on a single-sided disc with two individual recordable layers. With dual layer DVD recording, consumers can create longer home movies and even consolidate many home movie projects onto a single disc. 8.5 GB of uncompressed DVD disc space provides large storage and back up media for computer applications. You can pack up to 12 CDs or more than 6,000 floppy disks worth of information onto a single dual layer DVD disc. The DVD specifications require that compliant players and drives read dual-layer discs. Some discs are capable of “seamless layer change” which means that there is no noticable pause or break when the laser reads video materials continuing from one layer to another at the
