Saturday, October 10, 2015
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
3Q15 Hard Disk Drive Shipments Report
Japanese Fund may Invest In Sharp: report
ASUS Upgrades Its ROG Gaming Lineup
ITC Says Samsung Did Not infringe Nvidia's Patents
ARCHOS and Sikur Ensure Your Privacy with GranitePhone
Firefox To Switch Away From Plugins
Apple Removes Apps From Online Store
PC Shipments Kept Falling In 3Q
Active Discussions
How to back up a PS2 DL game
Copy a protected DVD?
roxio issues with xp pro
How to burn a backup copy of The Frozen Throne
Help make DVDInfoPro better with dvdinfomantis!!!
Copied dvd's say blank in computer only
menu making
Optiarc AD-7260S review
 Home > News > Optical Storage > Researc...
Last 7 Days News : SU MO TU WE TH FR SA All News

Monday, October 23, 2006
Researchers Burn BD-Rs at 12x

Researchers announced at ISOM 2006 important new developments involving high-speed recording on Blu-Ray media, presenting recordings on Blu-Ray discs at speeds as high as the 12x.

Philips researchers (R. G. J. A. Hesen, J. H. G. Jaegers, A. P. G. E. Janssen, J.Rijpers, P. R. V. Sonneville, J. J. H. B. Schleipen (Philips Research, Netherlands)) discussed their 10x and 12x recording experiments on Cu:Si-based BD-R discs.

Pushing the recording speeds further is not an easy task and requires developments in both hardware and materials. Disc physical parameters are also a limiting factor for the maximum attainable writing speed, including a high noise level during recording as well as vibration. But the most important factor is the maximum allowed spinning speed of an optical disc. For 12cm discs (CD/DVD), spinning an optical disc at 10,800rpm has been proven as the realistic upper bound for half-height drives. A 12cm BD disc rotates between 1955 and 821rpm (inner to outer diameter) at 1X speed, so simple calculations result to the fact that the 12X (CAV) is expected to be the upper limit (ceiling) for BD devices on a PC. This is a simple theoretical approach and of course, reaching the 12x CAV writing speed also depend on the developments on the chemicals used for the disc and the performance/accuracy of the moving parts (hardware) used in a BD recorder.

Philips showcased that the 7x (4-7x CAV) as well as at the 10x and 12x recording speeds on BD-R media has already been achieved. The BD-R media used for the experiments was not featuring a phase-change or a dye layer, but instead a Cu/Si bilayer was applied. TDK was the first to propose the use of Cu and Si as a recording medium in a write-once Blu-Ray disc. Under the impact of a laser power the two layers mix, thus creating a recording mark having a reflectivity that differs markedly from its non-irradiated environment. But the actual challenge here is to define the thickness of each layer (element) that will give the best results (reflectivity e.t.c) for an optimized writing strategy.

Philips scientists claim that their experiments with the their Cu/Si media were successful and that they achieved adequate a recording quality (jitter below 7%).

So as long as both blank discs and component designs can keep up, a full BD-R (SL) disc may be eventually written in approximately 11 minutes in case of rewritables and multilayered discs. In practice, the upper limit might prove to be as low as 7x, due to their complicated structure and their high spinning speed at such high speeds. But Philips said that it expects that the implications of high speed recording on servo bandwidths and system margins will be solved soon.

BitTorrent Partners with Global CE Manufacturers        All News        Philips Achieves 75 GByte of Data on 12cm Disc
Technicolor New AVC Encoding Application For Next-Generation DVD Compression and Authoring     Optical Storage News      Philips Achieves 75 GByte of Data on 12cm Disc

Get RSS feed Easy Print E-Mail this Message

Related News
U.K. Physical Media Market To Keep Falling In Q3 2015
Sharp Showcases Ultra HD Blu-ray Recorder, 8K TV at CEATEC 2015
Siri Meets Philips Hue
Panasonic DMR-UBZ1 Is The World's First BD Recorder With Ultra HD Blu-ray Playback Capability
Philips Hue Lightstrip Plus Will Paint A Whole Room
IFA: Philips Brings Quantum Dot Monitors to Europe
Licensing Ultra HD Blu-ray Format To Start This Month
Philips 27 Full HD Quantum Dot Monitor monitor Promises Perfect RGB Coverage
Blu-ray Disc Association Completes Ultra HD Blu-ray Specification
Philips Hue Go Lets You Take The Light With You
DIGISTOR Releases New Professional Grade Blu-ray Recordable Media
Blu-ray Players Could Install Malware

Most Popular News
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2015 - All rights reserved -
Privacy policy - Contact Us .