100GB BD-Rs at CEATEC 2007

[radagast]

Prototypes of TDK's new BD-R discs capable of recording at the 6x speed, reading of 100GB BD-Rs as well as new laser diodes for 8x BD-R recording were exhibited at CEATEC 2007.

TDK's 100 Quad-layer BD-R

TDK showcased a new BD-Rs at its booth, featuring four layers and capacities of 100GB.

Instead of phase-change or a dye layer, TDK has applied a Cu/Si bilayer as a recording medium for the new discs. Under the impact of the laser pulse while disc recording, the two layers will mix, thus creating a recorded mark having a reflectivity that differs markedly from its non-irradiated environment. TDK claims that the new disc features good overall optical characteristics and that the introduced jitter is low enough (<6.5%) to allow for safe recording at 6x. Note that the physical limit for the BD-R recording speed is the 12x, mainly defined by the maximum rotational speed of the disc (10800 rpm).

Recording at 6x means that 25GB of data will be stored on a BD-R disc in less than 16 minutes.

Although the Blu-Ray Disc Association has not yet included the 6x recording speed for Blu-Ray, TDK said that the new 6x BD-R media is at the final stage of their engineering development.

Multi-layer BD-R reproduction by Hitachi

At the same event, Hitachi showcased a prototype optical disc device capable of reading 4-layer Blu-Ray discs (100GB). Hitachi said, that developing this technology required a drive capable of detecting which layer to read. The company has not specified how the pickup lens actually detects the readout layer, but reportedly explored a wide variety of methods including a very basic way, in which the pickup lens finds a targeted layer by scanning each layer in order of shorter distance from the optical head.

Multi-layer discs are harder to read since the information is stored on stacked recording layers, limiting the amplitude of the reflective/penetrable signal required for reading/recording. As a result, the laser light that reaches the photo detector of a reader for example, is very weak to allow for accurate retrieving of the stored data.

For future devices that read multi-layered Blu-Ray discs, the Japanese company examines the possibility to use an optical system that is able to amplify the read-back signal of a optical disc, allowing the efficient reproduction. To solve this issue, Hitachi technology allows for recovering and amplifying the weak optical signal that includes the data information in the reading process of a multi-layer optical disc. Hitachi said that the technology amplifies the reading signal by 10 times. As a result, up to 4~8 layers can be read/recorded, which means that a disc with a capacity of 100~200 GB can become a reality when using a purple/blue wavelength.

Hitachi said that it will be able to commercialize the new optical technology in 2009.

Panasonic Laser Diode For 8x BD Recording

Panasonic showcased the basic components of a future 8x Blu-Ray burner, including a 405nm, 250 mW Blue laser diode capable of offering recordings on Blu-Ray media at 8x. The company said that an 8x Blu-Ray burner is under development followed by a 12x one in the future.

http://www.cdrinfo.com/Sections/News...x?NewsId=21537

[w_tanoto]

this morning hitachi's 100gb. now, tdk

[radagast]

Originally Posted by w_tanoto

this morning hitachi's 100gb. now, tdk

TL51 is a day late and 49GB short.

[Dave]

Originally Posted by radagast

TL51 is a day late and 49GB short.

ROFL LMAO WTF LOL OMG STFU BBQ

[Papi4baby]

Originally Posted by radagast

TL51 is a day late and 49GB short.

LMAO

[kaliraver]

Owned!

[smiley]

The world of blu just keeps getting better

[phloyd]

It will be interesting to see if they release a pressed version of the 100GB disc (and compatibility etc).

TL51 is supposed to be a pressed disc, right? These are recordable discs.

TL51 can't be recordable since they can hardly record to a SL at 1x on HD DVD...

[w_tanoto]

Originally Posted by phloyd

It will be interesting to see if they release a pressed version of the 100GB disc (and compatibility etc).

TL51 is supposed to be a pressed disc, right? These are recordable discs.

TL51 can't be recordable since they can hardly record to a SL at 1x on HD DVD...

and they don't even have RW. how can one call that complete format, and bd incomplete format??

[pro-bassoonist]

Originally Posted by phloyd

It will be interesting to see if they release a pressed version of the 100GB disc (and compatibility etc).

The article clearly explains the flexibility of this new technology as well as HITACHI's plans to commercialize it in 2009.

Pro-B

[swifty7]

but it will pointless if current 1st and 2nd gen BD players are not able to read them same as TL51 with current 1st, 2nd and 3rd gen hd-dvd players but at least in the their case there is a possibility.

[domerdel]

we have to wait til 2009 to get 100gb? i thought that was for the 200 gb disc (currently in lab)?

[nails]

Originally Posted by domerdel

we have to wait til 2009 to get 100gb? i thought that was for the 200 gb disc (currently in lab)?

200gb disk was just created as a prototype and announced so people could have a general idea how powerful the blu-ray format is. However I'm pretty sure you would have to purchase a new player to read something with that many layers.

HD-DVD announces 50gb HD-DVD disks for release in 2008, and now two blu-ray supporters announce 100gb as if they were trying to say "that was a cute gesture" to the HD-DVD community.

HAHA.. This war is so much fun, it is the highlight of my days.

[lch]

Originally Posted by nails

HD-DVD announces 50gb HD-DVD disks for release in 2008

did hd-dvd put any release date for their 'sci-fi' tl51 ?

[w_tanoto]

I hope BDA will finalise this disc soon, well at least preliminary specs first.

[w_tanoto]

Originally Posted by nails

HD-DVD announces 50gb HD-DVD disks for release in 2008

and remember TL51 is ROM only, aka can't write/store data, while this bd100 can. the difference is only a year. maybe they launch late 2008, and we have 100gb early 2009

[Sonny]

mmmmm 100gig BD's we just need a filmware upgrade,I love it.....sorry little guy(hd-DVD)

[radagast]

Originally Posted by Sonny

mmmmm 100gig BD's we just need a filmware upgrade,I love it.....sorry little guy(hd-DVD)

hd-dvd is such a "toy" format.

[jermwhl]

Originally Posted by swifty7

but it will pointless if current 1st and 2nd gen BD players are not able to read them same as TL51 with current 1st, 2nd and 3rd gen hd-dvd players but at least in the their case there is a possibility.

BD 100's will be able to be read from current players with a firmware upgrade. Hitachi has stated this already. They haven't fully gotten all the bugs out yet, but will soon. The BD-200's they are confident will also be able to be read with a firmware upgrade, though they haven't 100% verified this.

[swifty7]

of course they're going to say it will be compatible with current gen players with a FW upgrade, they want to make early adopters feel good about their purchase.