People were impressed when Konami and Kojima Productions managed to fill up an entire dual-layered 50GB Blu-ray disc with Metal Gear Solid 4. But 50GB discs? That's so passé. Pioneer has just developed a sixteen-layer Blu-ray disc that holds 400GB of data (!). With this kind of disc, your PS3 hard drive could be copied five times over, just for the heck of it.

Unfortunately, this impressive tech will not be compatible with your current PS3. [Update: There is some debate over this fact. Some are claiming current BD lasers will be able to read these discs. More info should be revealed next week.] However, the specifications used to manufacture these 400GB discs will allow any future reader that supports these discs to be backwards-compatible with older Blu-ray discs. We can already see the future: Final Fantasy XV on PS4, with over 2 weeks of cutscenes.

July 7, 2008, Tokyo, Japan - Pioneer Corporation has succeeded in developing a 16-layer read-only optical disc with a capacity of 400 gigabytes for the first time in the world*1. Its per-layer capacity is 25 gigabytes, which is the same as that of a Blu-ray Disc (BD). This multilayer technology will also be applicable to multilayer recordable discs. This development has bolstered Pioneer's confidence in the feasibility of a large-capacity optical disc, which is expected to become necessary in the near future.

For multilayer optical discs, it has been difficult to obtain clear signals from each recording layer in a stable manner due to crosstalk from adjacent layers and transmission loss. Utilizing the optical disc production technology that it has developed in the DVD field, Pioneer solved these problems by, among other things, using a disc structure that can reduce crosstalk from adjacent layers, resulting in a 16-layer optical disc that can playback high-quality signals from every layer.

As for the read-out system, Pioneer achieved stability in the playback of recorded signals by employing a wide-range spherical aberration compensator and light-receiving element that can read out weak signals at a high signal-to-noise ratio in the optical pick-up mechanism. Since the optical specifications of the objective lens, such as NA (Numerical Aperture)*2, are the same as those for the existing BD discs, it is possible to maintain compatibility between the new 16-layer optical disc and the BD discs.

The 16-layer optical disc technology, capable of storing much more data than the conventional discs on one disc, will greatly reduce the number of discs to be used and therefore contribute to the conservation of resources.

Pioneer will present the details of this research at the International Symposium on Optical Memory and Optical Data Storage 2008 (ISOM/ODS2008) to be held in Hawaii from July 13.
Notes
*1: According to Pioneer survey, as of July 7, 2008.
*2: NA: The higher numerical aperture of the objective lens, the smaller diameter of the beam spot focused on a disc surface.

Das hatte seine Gründe, die nicht auf seinen Beitrag selbst zurückzuführen sind. Die betroffene Person wird wissen, worum es geht.

Scheinst ja erstaunlich gut Bescheid zu wissen über andere;)