| Toshiba Announces World's First SD-Read Only Drive for Computers SD Comes of Age with Next-Generation High Density Optical Disc Drive
7 November, 1995
The drive is designed to fully conform to the SD format, including its back-to-back bonding of 0.6mm-thick five-inch discs and a single-sided capacity seven times larger than that of a CD-ROM disc. The data transfer rate of the new drive is 1,350 kilobyte per second, equals to that of a CD-ROM drives with a 9-times rotational speed -- a speed yet to be achieved. An additional plus for computer users is that they can enjoy the SD's high-quality moving picture image and high quality sound by installing an MEPG-2 decoder board and a Dolby AC-3 decoder board in their computers.
The development of the SD-ROM drive was achieved by the integration of Toshiba's state-of-the-art technologies for high density optical discs, including a new pick-up head, LSIs for SD systems and a low-noise short-wave semiconductor laser diode. The newly-developed optical pick-up achieves backward compatibility through incorporation of two lenses: one is for SDs, while the other allows users to continue to use their audio CDs and CD-ROM software.
Large capacity SD-ROM discs will encourage advanced software for entertainment and education. It will make full use of moving images and sound with a quality that far exceeds that of current CD-ROMs. The SD-ROM can also be utilized for home shopping via electronic catalogues, and other businesses that are emerging with the increasing development of mulitmedia applications.
The drive will be shown at COMDEX/Fall, due to start on November 13 in Las Vegas, U.S.A.
Main specifications of the SD-ROM drive
Note: Dolby is a trademark of Dolby Laboratories Licensing Corp.
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