More details on Sony DVD-RAM..................
Did you realize that disks recorded on a DVD-RAM drive will not play back on a DVD-ROM drive? Is this true?
japanbiztech.com
Sony, Philips Propose Rewritable DVD Format
<Picture>TOKYO -- A new rewritable digital video disc format, which is not compatible with the international standard for DVD-RAM, has been proposed by Sony Corp. of Japan, Philips Electronics N.V. of the Netherlands and Hewlett-Packard Co. of the United States.
Their new format will be unveiled Aug. 20 at a Kobe, Japan, meeting of ECMA, a European industry association for standardization. It is said to be a phase-change optical disk capable of storing 3 GB of data on each side.
The new format is one of many viable candidates for 12cm rewritable DVDs, which include DVD-RAM, ASMO from Imation Corp. of the United States, and MMVF from NEC Corp. The new format could indicate a rough road ahead for the DVD-RAM format still supported by Tosa Corp., Hitachi Ltd. and Matsu shita Electric Industrial Co., Ltd.
The proposed rewritable DVD format will use the track-wobbling method, employed for the CD-R format, to record address and clock signals. And the new format only uses grooves to store data.
Like DVD-RAM, a disk recorded under the trio's new format cannot be played back on the currently available DVD-ROM drive or DVD player.
However, with some minor modifications DVD-ROM drives will be able to read data from the new rewritable DVD.
No shipping dates have been disclosed.
Sony announced its 3GB phase-change optical disk format at the International Symposium on Optical Memory and Optical Data Storage in July 1996.
Sony has since argued in favor of the groove-record format, saying the rand/groove record format eventually employed by DVD-RAM is difficult to control.
Sony's format includes a track pitch of 0.78 microns and the EFM-Plus encoding method.
Philips announced a phase-change optical disk capable of recording 3GB at the Optical Data Storage Topical Meeting in April 1997.
(Nikkei Electronics)
Nikkei Electronics - 08/14/97 |
