A CD-ROM drive is now a standard feature in all computers. Make sure you're getting at least a 40X CD-ROM read speed. An additional consideration these days would be whether you want read-write capability - many computers now come with CD-RW drives. DVD-ROM drives are also being bundled in desktops. Even better, some come with DVD-RW drives which will save you the cost of buying a separate DVD writer later on.
July 7, 2008, Tokyo, Japan – Pioneer Corporation has succeeded in develo
ping a 16-layerread-only optical disc with a capacity of 400 gigabytes for the first time in the world*1. Itsper-layer capacity is 25 gigabytes, which is the same as that of a Blu-ray Disc (BD). Thismultilayer technology will also be applicable to multilayer recordable discs. Thisdevelopment has bolstered Pioneer’s confidence in the feasibility of a large-capacity opticaldisc, which is expected to become necessary in the near future.For multilayer optical discs, it has been difficult to obtain clear signals from each recordinglayer 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 canreduce crosstalk from adjacent layers, resulting in a 16-layer optical disc that can playbackhigh-quality signals from every layer.As for the read-out system, Pioneer achieved stability in the playback of recorded signals byemploying a wide-range spherical aberration compensator and light-receiving element thatcan 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, arethe same as those for the existing BD discs, it is possible to maintain compatibility betweenthe new 16-layer optical disc and the BD discs.The 16-layer optical disc technology, capable of storing much more data than theconventional discs on one disc, will greatly reduce the number of discs to be used andtherefore contribute to the conservation of resources.Pioneer will present the details of this research at the International Symposium on OpticalMemory and Optical Data Storage 2008 (ISOM/ODS2008 ) to be held in Hawaii from July13.
ping a 16-layerread-only optical disc with a capacity of 400 gigabytes for the first time in the world*1. Itsper-layer capacity is 25 gigabytes, which is the same as that of a Blu-ray Disc (BD). Thismultilayer technology will also be applicable to multilayer recordable discs. Thisdevelopment has bolstered Pioneer’s confidence in the feasibility of a large-capacity opticaldisc, which is expected to become necessary in the near future.For multilayer optical discs, it has been difficult to obtain clear signals from each recordinglayer 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 canreduce crosstalk from adjacent layers, resulting in a 16-layer optical disc that can playbackhigh-quality signals from every layer.As for the read-out system, Pioneer achieved stability in the playback of recorded signals byemploying a wide-range spherical aberration compensator and light-receiving element thatcan 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, arethe same as those for the existing BD discs, it is possible to maintain compatibility betweenthe new 16-layer optical disc and the BD discs.The 16-layer optical disc technology, capable of storing much more data than theconventional discs on one disc, will greatly reduce the number of discs to be used andtherefore contribute to the conservation of resources.Pioneer will present the details of this research at the International Symposium on OpticalMemory and Optical Data Storage 2008 (ISOM/ODS2008 ) to be held in Hawaii from July13.
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