Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 23 views

    B.Chitti Babu 07X11A1211

    Uploaded by

    nav122
    This document provides an overview of Blu-ray discs, including their characteristics and specifications. It discusses the evolution from CDs to DVDs to Blu-ray discs, with Blu-ray discs having significantly higher storage capacities of 25-50GB compared to 700MB for CDs and 4.7GB for DVDs. The document describes key Blu-ray disc specifications like using a blue-violet laser with wavelength of 405nm, capacity of 23.3-54GB, and being backward compatible with CDs and DVDs. It concludes Blu-ray discs can store high-definition video and are likely to be adopted as the next-generation optical disc format.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPTX, PDF, TXT or read online from Scribd

    B.Chitti Babu 07X11A1211

    Uploaded by

    nav122
    23 views19 pages
    This document provides an overview of Blu-ray discs, including their characteristics and specifications. It discusses the evolution from CDs to DVDs to Blu-ray discs, with Blu-ray discs having significantly higher storage capacities of 25-50GB compared to 700MB for CDs and 4.7GB for DVDs. The document describes key Blu-ray disc specifications like using a blue-violet laser with wavelength of 405nm, capacity of 23.3-54GB, and being backward compatible with CDs and DVDs. It concludes Blu-ray discs can store high-definition video and are likely to be adopted as the next-generation optical disc format.

    Original Description:

    Original Title

    760145_634298301201013750

    Copyright

    © Attribution Non-Commercial (BY-NC)

    Available Formats

    PPTX, PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    This document provides an overview of Blu-ray discs, including their characteristics and specifications. It discusses the evolution from CDs to DVDs to Blu-ray discs, with Blu-ray discs having significantly higher storage capacities of 25-50GB compared to 700MB for CDs and 4.7GB for DVDs. The document describes key Blu-ray disc specifications like using a blue-violet laser with wavelength of 405nm, capacity of 23.3-54GB, and being backward compatible with CDs and DVDs. It concludes Blu-ray discs can store high-definition video and are likely to be adopted as the next-generation optical disc format.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    23 views19 pages

    B.Chitti Babu 07X11A1211

    Uploaded by

    nav122
    This document provides an overview of Blu-ray discs, including their characteristics and specifications. It discusses the evolution from CDs to DVDs to Blu-ray discs, with Blu-ray discs having significantly higher storage capacities of 25-50GB compared to 700MB for CDs and 4.7GB for DVDs. The document describes key Blu-ray disc specifications like using a blue-violet laser with wavelength of 405nm, capacity of 23.3-54GB, and being backward compatible with CDs and DVDs. It concludes Blu-ray discs can store high-definition video and are likely to be adopted as the next-generation optical disc format.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 19

    B.

    Chitti babu
    07X11A1211
    1
    CONTENT
    S
    1. Introduction
    2. Characteristics of Blu-ray disc
    3. Specification of Blu-ray disc
    4. Comparision of storage technologies
    5. Applications
    6. Conclusion

    2
    INTRODUCTIO
    N
    1st GENERATION :
     Compact Disc (CD):-- 650/700MB
     It is with us for over 20 yrs.
     Wavelength of laser which reads data: 780nm
     Color of laser: Red

    2nd GENERATION :
     Digital Versatile Disc (DVD):-- 4.7GB
     It offers high quality sound and video than CD.
     Wavelength of laser which reads data: 650nm
     Color of laser: Red
    3
    INTRODUCTION
    3RD GENERATION:
     Blu-ray disc (BD):-- 25/50 GB
     Next generation optical disc format.
     Wavelength of laser that reads data: 405nm
     Color of laser: Blue-violet which was developed by SHUJI
    NAKAMURA at NICHIA COPERATION.

     The format was developed to enable recording, rewriting and


    playback of high-definition video (HD), as well as storing large
    amounts of data.
     The “e” was intentionally left out of the name due to trademark
    4
    CHARACTERISTICS OF BLU-RAY

    Life Span
    Cost
    Capacity
    Robustness of disc
    Compatible

    5
    Life Span
    In the case of ordinary discs, the disc life is less .
    In the rewritable versions, as re-writing is done repeatedly to
    one area of the disc most probably, the inner perimeter limiting
    the disc life.
    BDFS (Blu-ray Disc File Structure is designed so as to avoid
    this problem, by using a system that uses free disc spaces with
    equal frequency Cost
     Long term Profitability model for content
    Providers
     Cheapest Production cost 6
    Capacity
    The Blu-ray disc enables the recording, rewriting and playback of
    HD video up to 27 GB of data on a single sided single layer. It is
    enough to put 2.5 hours of HDTV recording on it. It also can record
    over 13 hours of standard TV broadcasting .

    7
    Robustness of
    Disc
     Stronger resistance to scratches and fingerprints The
    protective layer is hard enough to prevent accidental
    abrasions and allows fingerprints to be removed by
    wiping the disc with a tissue.
    Compatible
    The BD drives are designed to be backward compatible, i.e.
    CDs and DVDs work equally well with the BD drives.

    8
    9
    BD
    Capacity SPECIFICATIONS
    23.3,25,27GB ; 50 ,54
    GB ;
    (single layer) (Double
    layer)
    Wave length of the 405nm
    laser
    Numerical Aperture of 0.85
    the objective lens
    Data transfer rate 36Mbps
    Thickness of the disc 1.2mm
    Diameter of the center 15mm
    hole 10
    Comparison of CD,DVD and B D specificatio

    Parameter CD DVD
    BD .
    Disk diameter 120 mm 120 mm 120
    mm
    Disk thickness 1.2 mm 1.2 mm 1.2 mm
    Laser wavelength 780nm 650 nm 405 nm
    Numerical aperture 0.45 0.60 0.85
    Minimum pit length 0.83um 0.4 um 0.138
    um
    Data rate 1.2 Mb/sec 11 Mb/sec 36 Mb/sec
    Number of sides one ----- one or
    two
    Number of data layers One ----- One or 11
    12
    13
    Blu-ray disc and CD’s /DVD’s
    (Comparison Between Blu-ray n others)

     1 DVD = 5 to 10 CD’s

     1 Blu-ray = 5 to 10 DVD’s !!!!!!

     Usage of a blue instead of a red laser

     Improved lens specifications

     Backward compatibility

    14
    Blu-ray Disc
    APPLICATIONS
     High definition television recording

     High definition video distribution

     High definition camcorder archiving

     Mass data storage

    15
    16
    CONCLUSIO
    N
    The blu-ray discs offers more storage capability up
    to
    54 GB,enough to hold about 4.5 hours of high –
    definition
    video or more than 20 hours of standard video.
    It is very likely that the technology will be adopted
    as the
    next generation optical disc format for pc storage
    and
    replace technologies such as DVD+-R ,DVD+-RW 17
    Queries..?

    18
    19

    You might also like