Thursday, November 27, 2014
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Twitter Tracks Apps Installed On Your Device, Introduces Offers
Ubisoft Apologizes For Assassin's Creed Unity Issues, Offers Free Game
Europe Wants Right-to-be Forgotten to Go Globally
Far Cry 4 Game Available For Free With Purchase of 840 EVO SSD
UK Music Industry Seeks For New Tax on CD Copying
Samsung's DeepSort Sorting Engine Prevails In Benchmarks
Sony Plans E-Paper Watch: report
HP Reports Fiscal 2014 Full-Year and Fourth Quarter Results
Active Discussions
Hi All!
cdrw trouble
CDR for car Sat Nav
DVD/DL for Optiarc 7191S at 8X
Copied dvd's say blank in computer only
Made video, won't play back easily
New Features In Firefox 33
updated tests for dvd and cd burners
 Home > News > Optical Storage > Double ...
Last 7 Days News : SU MO TU WE TH FR SA All News

Thursday, March 30, 2006
Double Layer DVD+RW Media Closer to Production


With the finalization of the Basic Format Specifications for the Dual Layer DVD+RW discs, the first media should be expected later this year.

The DVD+RW Alliance announced the establishment of the "DVD+RW DL" format almost two years ago. Philips released the DVD+RW part 2: Dual Layer, volume 1; DVD+RW 8.5 Gbytes, Basic Format Specifications, version 1.0, earlier this month.

The recording speed for DVD+RW DL recording is not expected to reach the current speed available for single layer DVD+R, due to the high power requirements for dual layer recording. The 2.4x is the debut speed for dual recording, expected to reach 4X in one year. Initial media will be write-once, while 8cm discs are also included in the specifications, offering 2.66GB available space per layer.

The DVD+RW DL media use two phase-change layers. The first semi-transparent layer should be formed in a way that it would balance transparency characteristics with efficient laser beam absorption just like it is the case with single layer recordable DVDs.

High transparency could be achieved by using a thinner recording layer, but this would result in a drop of laser absorption, which is insufficient to form and erase marks (recording signal patterns).

In addition, to maintain compatibility with current DVD players, the discs should feature a reflectivity of minimum 18%, a value technically difficult to achieve. Thus, the DVD+RW DL discs will possibly feature a lower reflectivity. In that case, a firmware upgrade in the existing DVD players/writers would be essential to maintain compatibility.

The first DVD+RW DL media are expected to appear in the market later this year, although Philips has not made any official announcement yet.

Japanese JVC has also announced it has made progress in developing double layer DVD-RW media. The DVD-RW DL format was approved by the DVD Forum last February.


Previous
Next
Watch TV on the Go        All News        Patent System Questionned in eBay Case
New Date for DaTARIUS' Blue Days     Optical Storage News      New Technology to Track Pirated Material

Get RSS feed Easy Print E-Mail this Message

Related News
Dual Layer DVD Re-writable Formats On the Way
Double Layer Rewritable DVD Officially Announced
JVC Announces Availability of First Dual Layer DVD-RW Discs
Rewritable DVD+RW Double Layer Format to Be Finalized by Year-End

Most Popular News
 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2014 - All rights reserved -
Privacy policy - Contact Us .