Top

New Device Reads Both HD DVD and Blu-ray Disc Media

One of the differences between the HD DVD and Blu-ray Disc formats is the discs' structure. Although both formats use the same laser wavelength (405nm), Sony's format modifies the structure of the disc to achieve a higher value of numerical aperture, which allows Blu-ray Disc to store up to 25GB on the same area a HD DVD disc can store 15GB.

As a result, Blu-ray Disc is incompatible with HD DVD and DVD media because instead of having a 12mm thick disc made of a 0.6 mm disc with 0.6 mm protective coating on top (as in DVD media), Blu-ray Disc is made of a 1.1 mm disc covered by a 0.1mm protective layer.

Read Full Story >>
news.teamxbox.com
The story is too old to be commented.
BLACKSTYX4120d ago

the beginning of the end

FreeMonk4119d ago

Well does that mean then if Sony's Blu Ray disc protective layer is only 0.1mm compared to HD-DVD's 0.6mm layer, your more likely to damage your Blu Ray discs??

I've had problems with DVD discs sometimes that I bought from the shop that wasn't connected to the inside box and had a little scratch on and didn't want to play, so surely Blu-Ray is going to be worse!!

Have Sony dropped yet another bollock?

DG4119d ago

BR uses a different type of coating that is more durable.