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Blue Ray - The Future of DVD???

Discussion in 'DVD±R for advanced users' started by Oriphus, Jun 8, 2003.

  1. Oriphus

    Oriphus Senior member

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    Just to let you all know about the potential of Blue Ray. In its current form, it is unlikely to take over from the DVD, but there is potential. It is a case enclosed system, a bit like RAM, but uses a Blue Laser opposed to a Red one. Blue lasers are thinner allowing more on the disk. The following is not written by me, but copied from the Matsushita (Panasonic) website:

    Nine leading companies 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.

    [bold]Confused? Read on....[/bold]

    [bold]Blue Ray Disc Key Characteristics:[/bold]

    [bold]1)[/bold] 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)

    [bold]2)[/bold] 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.

    [bold]3)[/bold] 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.

    [bold]Here is a Specification List of the Blue Ray System:[/bold]

    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


    Hope iv been a help people!

    [bold]dRD, is this in right forum for you and relevant? Again, i did check before releasing![/bold]
     
  2. Tosca

    Tosca Guest

    Pshaw!
     
  3. Oriphus

    Oriphus Senior member

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    Im not quite sure what
    actually means, but i take from it that you disagree. Good, but do more than say one word. Give reasons for your opinion - thats what the forums for!!
     
  4. Tosca

    Tosca Guest

    I say again!

    Pshaw!

    27gigs!? = new hardware = three years from now before it is affordable...

    I say yet again! Pshaw!
     
  5. Oriphus

    Oriphus Senior member

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    You can get a Blue Ray system now for £2000. Thats expensive, but i think 3years is a bit of a long time, dont you think?
    Current expectations is to have Blue Ray operating as a commercial unit by end 2004. Thats just one year. In two years they expect it to be a commercially viable entity to the consumer as well as enterprise. June 2005, mark my words, DVD will be changing. The DVD-Forum are already looking at the possiblities of Blue Ray. If they accept it as a replacement for DVD R, then we will see the changes.

    However, not to worry anyone who intends to stay with the DVD-R system as any new replacement for DVD-R will be backward compatible with that format.

    Come on Tosca, you call that an opinion.
    Do you even know what your talking about? Maybe your in the wrong forum, the one below is for the less knowledgeble ;-) lol
     
  6. newbie81

    newbie81 Guest

    just my 2 cents:
    blu-ray sounds great, but i do not think the general public will adopt this format as quickly as DVD/DVD-R. People have invested in DVD/DVD-R tech, players, receivers with players built in etc; thinking DVD is the future. No one likes to be told they were wrong, or that they just wasted their $. Besides, the price of buying blank blu-rays in the future will be more expensive because of it's protective case.
     
  7. Oriphus

    Oriphus Senior member

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    Well, I do understand what you are saying, however, VHS was the system everyone was familiar with a few years ago. People said back then that they wouldnt change to DVD. Look at where we are today!

    Blue Ray will be more expensive at the start, that is always the way. However, it will come down in price as everything does, and when it is more affordable, people who need the extra space will use it.

    Imagine this: You can put all 6 discs of the band of brothers box set onto one Blu Ray Disc. Even forgeting Blue Ray, Blue Laser technology as a whole has such potential. It IS the next big step in Video distribution media, and as long as it is backward compatible with DVD's, whats the problem?
     

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