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Rewritable DVD+RW Double Layer Format to Be Finalized by Year-End; Technical Feasibility Double Layer DVD+RW DL Proven.


TOKYO -- The DVD+RW Alliance An industry consortium devoted to promoting rewritable and write-once DVD standards. Founded in 1997 by HP, Philips, Sony and others, it developed the DVD+RW specification as an evolution of the CD-RW format. , a voluntary association of industry-leading personal computer, optical storage and consumer electronics manufacturers that support the Plus format for DVD DVD: see digital versatile disc.
DVD
 in full digital video disc or digital versatile disc

Type of optical disc. The DVD represents the second generation of compact-disc (CD) technology.
 recording, has announced that it has started discussions for a new rewritable double layer DVD+RW DL A DVD+RW DL is a rewritable optical disc with storage capacity of 8.5 GB. DVD+RW DL discs employ two rewritable dye layers.

In March 2006, the DVD+RW Alliance approved DVD+RW part 2: Dual Layer, volume 1; DVD+RW 8.5 Gbytes, Basic Format Specifications, version 1.
 standard that will be finalized by year end. Using a double layer DVD+RW DL disc a consumer can write and re-write up to 8.5 Gbytes of information or up to 4 hours of DVD quality time-shifting recording onto a single 12 cm disc.

"8.5 GB Double layer DVD recording is quite popular amongst PC users and is now standard on any new DVD writer A DVD drive that records/writes onto any combination of DVD-R, DVD+R, DVD-RW and DVD+RW media. Contrast with a DVD-ROM drive that only reads discs. See DVD and DVD burner. ," said Frank Simonis, Chair of the DVD+RW Alliance Product Promotions Group and Strategic Marketing Director for Philips Optical Storage. "Rewritable double layer DVD+RW DL will give consumers the extra recording time for consumer video recording and especially the 8cm discs for DVD camcorders."

During the ISOM/ODS conference Hawaii (July 2005), Philips Research presented its recent achievements in rewriteable double layer DVD+RW DL recording. Good performance was presented for recording at 2.4x as well as 4x recording speeds; for both layers low jitter A flicker or fluctuation in a transmission signal or display image. The term is used in several ways, but it always refers to some offset of time and space from the norm. For example, in a network transmission, jitter would be a bit arriving either ahead or behind a standard clock cycle  and high modulation values were achieved. Effective reflection of the media is around 5-7 %. In order to read this low reflective media Opaque materials such as a printed page or photograph that are scanned by shining light onto them, which is then reflected back to the sensors in order to record the image. Contrast with transparent media. , these discs will only be readable in DVD players/recorder that are designed to be compatible.

Based on the expertise of successfully standardizing the 'write-once' recordable double layer DVD+R DL in 2004 and the new technology innovations in rewritable 'phase change' technology in the past half year, the DVD+RW Alliance, together with consumer electronics and PC drive manufacturers, will shape the new DVD+RW DL standard. Moreover, on September 29 the DVD+RW Alliance will update these consumer electronics and PC drive manufacturers on the proposed details of the rewritable double layer standard during a technical seminar in Tokyo.

About DVD+R/+RW

Today the DVD+R/+RW format is capable of recording up to 8.5 gigabytes of digital video, images or data. This equates to the storage capacity of up to eleven CD discs and the potential to store thousands of digital photographs or approximately four hours of digital video. The primary benefit of DVD+R/+RW is its two-way compatibility, meaning that DVD+R (DVD+Recordable) A write-once (read only) version of the DVD+RW optical disc from the DVD+RW Alliance. DVD+Rs hold up to 4.7GB of data per side and can be read by DVD-Video players and computer DVD-ROM drives. A DVD+R DL disc is a "dual layer" DVD+R that holds a total of 8.5GB. , DVD+R DL and DVD+RW (DVD+Read Write) A rewritable (re-recordable) DVD disc for both movies and data from the DVD+RW Alliance. DVD+RW media can be read on DVD-Video players and computer DVD-ROM drives.  media can be played in most DVD video players and DVD-ROM DVD-ROM: see digital versatile disc.


A read-only DVD disc used to permanently store data files. DVD-ROM discs are widely used to distribute large software applications that exceed the capacity of a CD-ROM disc.
 drives tested.

About The DVD+RW Alliance

The DVD+RW Alliance is a voluntary group of industry-leading personal computer, optical storage and consumer electronics manufacturers. The companies promote the universally compatible, rewritable DVD+R/+RW format that enables true convergence between personal computing and consumer electronics products. Over 70 companies have formally joined DVD+RW Alliance to support DVD+R/+RW technology. Further details about the DVD+RW Alliance and member companies can be found at http://www.dvdrw.com. Product or service names mentioned herein are the trademarks of their respective owners.
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Copyright 2005, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Publication:Business Wire
Date:Sep 2, 2005
Words:497
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