In the hopes of keeping rival Blu-ray at bay, Toshiba, developer of HD-DVD, has announced its 51GB capacity HD DVD. Blu-Ray has long been regarded as the technically superior disc with a 50GB capacity. Previous HD DVD discs only held 15GB or 30GB of data. The extra capacity is accomplished through a 3rd layer. It remains to be scene if the “3rd layer��? will increase cost and production time significantly.