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Sony's 50GB Blu-ray Discs Or Mitsubishi's 30GB dual-layer HD DVD media?	By Anca Rusu, Technology Editor 17th of August 2006, 08:21 GMT Adjust text size:


After the launch of Mitsubishi's 30GB dual-layer HD DVD media, Sony hits the market with its high capacity 50GB dual layer Blu-ray Disc recordable (write-once) media with AccuCORE technology. As you may already know, Sony is the main backer of the famous Blu-ray standard, but the release on the retail market of its discs comes as a surprise, because the Blu-ray Alliance has been facing for quite a long time a component shortage of the laser diode. Sony's patented technology - the AccuCORE - has been recently introduced in the production process and it is aimed at diminishing the deterioration of the discs determined by scratches, data/image corruption or the fluctuation that occurs when the disc is spinning. "The arrival of 50GB Blu-ray Disc media is an important milestone in the evolution of this new format," said Mike Lucas, director of marketing for Sony Electronics' Media and Application Solutions Division. "The capacity represents more than four hours of HD quality video, at a 24 Mbps transfer rate, allowing users to take full advantage of Sony's Blu-ray Disc burners and VAIO desktop and notebook computers." Sony's 50GB dual layer recordable disc is already available for purchase at a suggested price of about $48. Mitsubishi's 30GB dual-layer HD DVD discs, on the other hand, are also available and they have been showcased just after Toshiba launched the world's first consumer PVR to support HD DVD-R. The company's representatives said that the single-sided HD DVD-R DL can store up to 150 minutes of HD content encoded at a 24Mbps playback rate. Moreover, it seems that the special high-sensitivity dye permits an enhanced recording process which can be applied on both the near-side and inner storage layers.

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