Memory Tech and Toshiba have announced that they've developed a new version of the TWIN format. By utilizing a three-layer structure, the new TWIN disc supports 30GB of HD DVD content and 4.7GB of standard DVD content.
The newly announced disc is the latest addition to the DVD TWIN format, discs that support both DVD and HD DVD content and that are fully compatible with both formats. The new disc boosts capacity and expands versatility with a three-layer structure offering support for two HD DVD layers and one DVD layer or two DVD layers and one HD DVD layer. Memory-Tech and Toshiba will propose the new disc to the HD DVD Forum, the industry body that defines DVD standards.

In a two-layer HD DVD configuration, the new TWIN disc has a 30GB HD DVD capacity, plus 4.7GB of standard DVD capacity. Configured to maximize standard DVD content, the disc can support 8.5GB on two layers, plus 15GB of HD DVD content on the third layer. DVD content can be played back on a standard DVD player, while HD DVD players can play back both formats.
Memorytech and Toshiba still need to have the new TWIN disc approved by the HD DVD Forum. Once it is, they plan to introduce the new format to content providers. More information on the new TWIN disc can be found here.