New DVD-RW drives up to 19GBs in one disc!

Nestor · Post by **Nestor** » Tue Apr 13, 2004 6:56 pm

I friend of mine, that works as a media supplyer told me new DVD-RW drives that can record up to 19GBs are in their way... They will record in a special way, using different layer deepness. Very interesting and amzing too, this truly is a HD in a simple small disc.

bosone · Post by **bosone** » Wed Apr 14, 2004 2:00 am

if you are interested, they will use a laser tuned in the blue range, which will be made with a material called "gallium nitride", the same that is used in the novel blue and white led on cell phones and PCs.
i did my PhD thesis of that material!! (not on laser, although!)

Nestor · Post by **Nestor** » Wed Apr 14, 2004 9:33 am

Very interesting. If you have any links of new drives that already support it, please post. I have searched with no success. Cheers.

kensuguro · Post by **kensuguro** » Wed Apr 14, 2004 9:47 am

sounds good. It's about time people came up with ways to back up serious amounts of data. Finally, I may have a way to back up my 200gig disk. One of my 200gig disks already died. (the backup one which wasn't used)

firubbi · Post by **firubbi** » Wed Apr 14, 2004 9:57 am

amazing news. please give us a link if you have.
thanks

braincell · Post by **braincell** » Wed Apr 14, 2004 10:03 am

<font size=-1>[ This Message was edited by: braincell on 2004-04-14 13:40 ]</font>

Nestor · Post by **Nestor** » Wed Apr 14, 2004 10:21 am

On 2004-04-14 11:03, braincell wrote:
You can already do this. Drive Image allows you to span disks to any size you want. Using the compression option you might be able to save 200 gigs on 2 CDs.

On 2004-04-14 10:47, kensuguro wrote:
sounds good. It's about time people came up with ways to back up serious amounts of data. Finally, I may have a way to back up my 200gig disk. One of my 200gig disks already died. (the backup one which wasn't used)

Are you kidding? What is it exactly that can compress to such an extent?

Nestor · Post by **Nestor** » Wed Apr 14, 2004 10:22 am

BTW: There is a Sony DVD drive (very expensive) that can record up to 25 GBs, targeted to film producers

bosone · Post by **bosone** » Wed Apr 14, 2004 10:35 am

this is a doc i downloaded during my PhD. just do a google search for some other info!

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Large Capacity Optical Disc Video Recording Format "Blu-ray Disc" Established
The Blu-ray Disc using blue-violet laser achieves over 2-hour digital high definition video recording on a 12cm diameter CD/DVD size phase change optical disc

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Tokyo Japan, February 19, 2002: Nine leading companies today announced that they have jointly established the basic specifications for a next generation large capacity optical disc video recording format called "Blu-ray Disc". The Blu-ray Disc enables the recording, rewriting and play back of up to 27 gigabytes (GB) of data on a single sided single layer 12cm CD/DVD size disc using a 405nm blue-violet laser. The companies that established the basic specifications for the Blu-ray Disc are: Hitachi Ltd., LG Electronics Inc., Matsushita Electric Industrial Co., Ltd., Pioneer Corporation, Royal Philips Electronics, Samsung Electronics Co. Ltd., Sharp Corporation, Sony Corporation, and Thomson Multimedia.
In addition to actively promoting the new format throughout the Industry, the nine companies listed above plan to begin licensing the new format as soon as specifications are completed. Licensing is expected to start around spring 2002.

By employing a short wavelength blue violet laser, the Blu-ray Disc successfully minimizes its beam spot size by making the numerical aperture (NA) on a field lens that converges the laser 0.85. In addition, by using a disc structure with a 0.1mm optical transmittance protection layer, the Blu-ray Disc diminishes aberration caused by disc tilt. This also allows for disc better readout and an increased recording density. The Blu-ray Disc's tracking pitch is reduced to 0.32um, almost half of that of a regular DVD, achieving up to 27 GB high-density recording on a single sided disc.
Because the Blu-ray Disc utilizes global standard "MPEG-2 Transport Stream" compression technology highly compatible with digital broadcasting for video recording, a wide range of content can be recorded. It is possible for the Blu-ray Disc to record digital high definition broadcasting while maintaining high quality and other data simultaneously with video data if they are received together. In addition, the adoption of a unique ID written on a Blu-ray Disc realizes high quality copyright protection functions.

The Blu-ray Disc is a technology platform that can store sound and video while maintaining high quality and also access the stored content in an easy-to-use way. This will be important in the coming broadband era as content distribution becomes increasingly diversified. The nine companies involved in the announcement will respectively develop products that take full advantage of Blu-ray Disc's large capacity and high-speed data transfer rate. They are also aiming to further enhance the appeal of the new format through developing a larger capacity, such as over 30GB on a single sided single layer disc and over 50GB on a single sided double layer disc. Adoption of the Blu-ray Disc in a variety of applications including PC data storage and high definition video software is being considered.

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"Blu-ray Disc" Key Characteristics
1) Large recording capacity up to 27GB:
By adopting a 405nm blue-violet semiconductor laser, with a 0.85NA field lens and a 0.1mm optical transmittance protection disc layer structure, it can record up to 27GB video data on a single sided 12cm phase change disc. It can record over 2 hours of digital high definition video and more than 13 hours of standard TV broadcasting (VHS/standard definition picture quality, 3.8Mbps)

2) High-speed data transfer rate 36Mbps:
It is possible for the Blu-ray Disc to record digital high definition broadcasts or high definition images from a digital video camera while maintaining the original picture quality. In addition, by fully utilizing an optical disc's random accessing functions, it is possible to easily edit video data captured on a video camera or play back pre-recorded video on the disc while simultaneously recording images being broadcast on TV.

3) Easy to use disc cartridge:
An easy to use optical disc cartridge protects the optical disc's recording and playback phase from dust and fingerprints.
Main Specifications
Recording capacity: 23.3GB/25GB/27GB
Laser wavelength: 405nm (blue-violet laser)
Lens numerical aperture (NA): 0.85
Data transfer rate: 36Mbps
Disc diameter: 120mm
Disc thickness: 1.2mm (optical transmittance
protection layer: 0.1mm)
Recording format: Phase change recording
Tracking format: Groove recording
Tracking pitch: 0.32um
Shortest pit length: 0.160/0.149/0.138um
Recording phase density: 16.8/18.0/19.5Gbit/inch2
Video recording format: MPEG2 video
Audio recording format: AC3, MPEG1, Layer2, etc.
Video and audio multiplexing format: MPEG2 transport stream
Cartridge dimension: Approximately 129 x 131 x 7mm

darkrezin · Post by **darkrezin** » Wed Apr 14, 2004 10:50 am

I think that by the time these come out and the discs become affordable, hard drive sizes will have increased even more!