Macsimum News: TDK says it’s achieved a capacity of 200GB that will double the capacity of their current 100GB Blu-ray prototype. One 200GB disc could store approximately 18 hours of high definition video.
The initial Blu-ray Disc standard allows for 25GB single layer Blu-ray Discs and 50GB dual layer Blu-ray Discs. However, a recent signal processing innovation stretches the physical limits of optical media, realizing 33.3GB capacity for each of the disc’s six layers. As with the 100GB disc, and other Blu-ray Disc media, TDK’s 200GB blue laser disc is single-sided.
The company’s 100GB prototype disc uses four 25GB layers to reach 100GB capacity. For the 200GB technology development, TDK has stretched the physical margins of the Blu-ray Disc format, enabling a disc to store up to 33.3GB per layer while staying within the tolerances of the BD playback specifications, according to Bruce Youmans, vice president of product research & development.
A single-layer Blu-ray Disc can hold 25GB, which can be used to record over two hours of HDTV or more than 13 hours of standard-definition TV. There are also dual-layer versions of the discs that can hold 50GB.
TDK has already begun shipment of its single-layer 25GB recordable and rewritable media in the first quarter of 2006. 50GB discs, which are dual layer, have now just begun shipping, retaililng at €35 for a write-once, and €45 for a re-writeable disc.
More at CD Freaks.com