Thursday, September 20, 2018
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
AR Headset Prevalence is Still a Few Years Out
Alibaba and Intel Cloud Deliver Joint Computing Platform for AI Inference at the Edge
GoPro Launches New Hero 7 Black, Silver and White Cameras
Xiaomi Launches the Mi 8 Lite And Mi 8 Pro Smartphones in China
Airbnb to Comply with European Commission Demands, Facebook and Twitter Need to Do More
Pioneer Unveils New Flagship UDP-LX800 UHD BD Player
Nvidia Said to Chose TSMC Over Samsung For GPU Production
Japanese Cryptocurrency Exchange Zaif Hacked
Active Discussions
Which of these DVD media are the best, most durable?
How to back up a PS2 DL game
Copy a protected DVD?
roxio issues with xp pro
Help make DVDInfoPro better with dvdinfomantis!!!
menu making
Optiarc AD-7260S review
cdrw trouble
 Home > News > Optical Storage > New Sig...
Last 7 Days News : SU MO TU WE TH FR SA All News

Monday, January 04, 2010
New Signal Quality Evaluation Method for 33.4GB/Layer BDs Unveiled


Sony and Panasonic have revealed a new data evaluation technique that could lead to Blu-ray discs holding up to 33.4GBs per layer for a total storage count of 66.8GBs.

A paper submitted at the International Symposium on Optical Memory 09 (ISOM 09) held last October in Nagasaki, Japan, described a new method of evaluating Blu-ray Disc media quality even at the higher capacity of 33.4 GB per layer. The new method is likely to accelerate development of discs offering even more storage space.

J. Shiraishi, S. Kobayashi (Sony Japan) and H. Miyashita, Y. Hino (Panasonic, Japan) developed a new signal evaluation method called i-MLSE (Maximum Likelihood Sequence Estimation) evaluation index. The method is considered as an apropriate one for the evaluation of the signal of a 33.4 GB BD-R disc, which is using the partial response maximum likelihood (PRML) signal processing method. The nature of the PRML method, which assumes inter-symbol interference, has made it difficult to rely in jitter measurements for the evaluation of the quality of a BD-R disc.

The two key characteristics of the i-MLSE is that is shows a strong correlation with the Symbol Error Rate (SER), in read/write at 33.4 GB using PRML. The SER value indicates the reported when a BD-R disc is read, meaning that it is a sazfe way to evaluate the quality of a recorded BD-R disc. As the Tech-On web site indicates, "i-MLSE exhibits the same relationship to signal quality as conventional jitter." In other words, it will be relatively simple to estimate the read error rate from the i-MLSE, just as can be done now with jitter.

i-MLSE continue to use the existing Blu-ray optics: a blue-violet laser diode with a 405 nm wavelength, and an object lens with a numeric aperture (NA) of 0.85. However, the report notes that processing hardware within certain Blu-ray drives may need to be tweaked as the improvements associated with i-MLSE are reliant on boosted performance in real time.

i-MLSE could allow both Blu-ray readers and burners to deal with up to a third more capacity, while Hollywood distributors could pack their releases with longer movies and more related content.

Although neither submitted to nor approved by the official Blu-ray Disc Association, Sony is expected to formally table i-MLSE for possible inclusion to the existing Blu-ray standard.

Many other optical storage technologies have been also presented at ISOM 09. was given to Takashi Nishihara, Akio Tsuchino, Yuko Tomekawa, Hideo Kusada, Rie Kojima, Noboru Yamada (Panasonic, Japan) for their paper entitled "First Proposal of 100 GB Rewritable Triple-layer Optical Disk using a GeTe-rich GeSbTe Film and a New Dielectric Film with a High Refractive Index". According to the paper, the recording-capacity of 33.4GB/layer and the triple-layer structure of a disc were enabled by a high-contrast GeSbTe film and a TiO2-based film, respectively. A sufficiently low SER, <1E-4, was confirmed for every layer at the data-rate of 72Mbps, according to the authors.

The 'Best Technical Paper Award' had been received by Nobuki Yamaoka, Shigenori Murakami, Yukihiro Sugawara, Seiro Ohshima, Toshihiko Takishita, Fumihiko Yokogawa (Pioneer, Japan) for their work on the "Thermal Recording for 200GB SIL Disc Mastering". The authors chose a dielectric as the recording material of the thermal recording. They confirmed that 200GB density data could be recorded with this material. The recorded pit shape was sharp enough to allow for read and write procedures, according to the scientists.

Panasonic also proposed a new adaptive write strategy to obtain high quality signal for recording density of 33.4GB/layer onto high transparent recording layer, and realized a 100GB capacity of a rewritable triple-layer disc.


Previous
Next
3D Display Revenues Forecast to Reach $22B by 2018        All News        Samsung Announces New Netbooks
Mainstream Adoption of 3D in the Home Moves One Step Closer     Optical Storage News      Blu-ray Disc Association Announces Final 3D Specification

Get RSS feed Easy Print E-Mail this Message

Related News
Pioneer Unveils New Flagship UDP-LX800 UHD BD Player
Redbox Launches 4K Ultra HD Rentals in Six Markets
DVDFab UHD Creator 4K UHD Authoring Software Released
CES: Blu-ray Disc Association Starts Licensing of 8k/4K Broadcast Recordable Blu-ray Format
CES: Sony Presents New OLED TVs, Audio Products, Robot Car Image Sensors
Panasonic Debuts HDR10+ OLED TVs, Ultra HD Blu-ray Players and New Technics Turntables at CES
New Pioneer BDR-XD07 External Blu-ray Burners Connect Directly to Android Smartphones
LG UP970 Ultra HD Blu-ray Player Supports Dolby Vision High Dynamic Range, Hi-Res Audio, Streaming and Dolby Atmos
One-Blue Launches Licensing Program for Ultra HD Blu-ray Disc Products
Panasonic DMP-UB30 Ultra HD Blu-ray Player Debuts in Japan
AACS 2.0 Could Be Cracked As 4K UHD Blu-Ray Torrent File Appears Online
One-Blue Calls For Ultra HD Blu-ray Patents

Most Popular News
 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2018 - All rights reserved -
Privacy policy - Contact Us .