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To: coopie who wrote (24854)	11/5/1997 8:53:00 AM
From: BillyG	Read Replies (1) \| Respond to of 50808

Pioneer Bases DVD-R/W Drive on DVD-R Spec November 5, 1997 (TOKYO) -- Pioneer Electronic Corp. developed a rewritable DVD (DVD-R/W) drive that can record and replay DVD-R information. Details of the technology were announced in a post session of the Joint Magneto-Optical Recording International Symposium and International Symposium on Optical Memory (Joint MORIS/ISOM '97) held in Yamagata from Oct. 27-31, 1997. Pioneer said the drive still are under development, so it could only show a single-sided storage capacity of 3.95GB. Pioneer also explained that the DVD-RW it aims to develop will have a single-sided storage capacity of 4.7GB. Pioneer already submitted a product proposal based on this technology to the DVD Forum. Its new devices will be able to replay DVD-ROM, DVD-Video and DVD-R, and DVD-RAM still is under consideration. Materials for a phase-change disk also have been developed. The difference for a reflective rate between a marked and unmarked place at recording has been enhanced more than 20 percent, the company said. To form a mark at the recording, the setting for the laser pulse, times supplied on a disk and power, were modified. The modification solves cross-erase and cross-talk problems during replay, the company said. Related stories: Pioneer to Unveil Third Optical Disk Specification Toshiba Makes 15GB DVD With New Laser (Nikkei Electronics)