Dual layer technology for DVD-R.

on October 3, 2003, Pioneer announced the technical development of a recordable disc that has the same physical parameters as a single-sided dual-layer DVD-ROM. It has a capacity of 8.5GB and a recording layer in the same position as DVD-ROM, and also has the same physical characteristics as DVD-ROM after recording, including jitter values. Because it is made to operate in the same recording mode as DVD-R, it enables high compatibility and recording and playback from a single side.

It allows continuous video recording and playback of approximately four hours in standar