The organisation, which controls the DVD format, has also approved the mandatory use of the Apple-favoured AAC for audio tracks stored in the DVD-ROM partition of future DVD Audio discs.
Approval of HD DVD 1.0 follows the approval last November of version 0.9 of the spec. The specification covers the physical construction of an HD-DVD, either as a 15GB single-layer disc or a 30GB dual-layer product. An early version of HD-DVD-RW was approved last February.
Approval of the spec. paves the way for disc makers and drive suppliers to build products around the technology. The Forum has already begun promoting the format to such companies. HD-DVD provides a higher capacity that DVD by the use of a blue laser. The optical systems shorter wavelength (405nm to DVD’s 650nm) essentially means the laser can read smaller pits on the discs surface. Smaller pits mean a greater pits in a given area and thus a higher data capacity.
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