Pioneer has created a new multi-layered Blu-ray disc with a capacity of 400GB.
This read-only disc has 16 layers and holds 25GB per layer like the current single layer 25GB disc and the dual-layer 50GB Blu-ray disc.
The new multi-layer technology can also be used on rewritable discs.
The only thing that remains to be known is if these new discs can be read by current Blu-ray players. And if not will a firmware update allow current player to this.
Pioneer has stated that it will present the details of this new disc at the International Symposium on Optical Memory and Optical Data Storage 2008 which takes place July 13 in Hawaii. Hopefully any compatibility questions will be answered then.
Pioneers press release is below.
Tokyo, July 7, 2008 - (JCN Newswire) - 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*. 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)**, 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.
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