BLU RAY DISC
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BLU RAY DISC

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BLU RAY DISC BLU RAY DISC Presentation Transcript

  • BLU- RAY DISC
    PREPARED BY
    -DEEPALI RATHOD
  • HISTORY
    Blu-ray, also known as Blu-ray Disc (BD) is the name of a next-generation optical disc format.
    Developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data.
    The name Blu-ray is derived from the Underlying technology, which utilizes a blue-violet laser to read and write data
  • HISTORY
    The name is a combination of "Blue" (blue-violet laser) and "Ray" (optical ray)
    According to the Blu-ray Disc Association IN the spelling of "Blu-ray“,the character "e" was intentionally Left out so the term could be registered as a trademark.
  • FORMATS OF BD
  • TYPES OF BD
  • BLUE RAY’S DURATBILITY ADVANTAGE
    • Various hard coating technologies make Blu ray disc most durable and “family -friendly”
    • Hard-coating technology provides resistance to:
    - Finger prints
    - Marks
    - Scratches
    - Dust
    • Much more ROBUST than today’s polycarbonate-based CD/DVD’s (and HD DVD’s)
  • STRUCTURE OF BLU-RAY DISC
    PITS : Discs store digitally encoded Video and
    audio information in pits – spiral grooves that run from the center of the disc to
    its edges.
    LASER: A laser reads the other side of these pits
    TRACK PITCH : iT IS THE DISTANCE BETWEEN TWO TRACKS(OF
    PITS) ON THE SURFACE.
  • STRUCTURE OF BLU-RAY DISC
    SO IN BLU-RAY DISC
    PIT SIZE -0.15 MICRONS
    (MORE THAN TWISE
    AS SMALL AS THE PITS
    ON DVD.
    TRACK-PITCH IS 0.32 MICRONS
    Laser needed : blue-violet laser (405 nm)
    Data transfer rate: 36Mbps
  • CD VS. DVD VS. BD
    BD
    (3RD GENERATION)
    DVD
    (2ND GENERATION)
    CD
    (1ST GENERATION)
  • CD VS. DVD VS. BD
    BD Disc will increase DVD capacity by 5 to 10 times.
    usage of a blue instead of a red laser improve lens specifications, allowing for a much smaller focus laser beam which enables the recording of much smaller and higher density pits on the disc
  • CD VS. DVD VS. BD
  • COMPARISION IN BUILDING DVD VS. BD
    BD
    DVD
    • Data is placed on top of a 1.1 mm thick polycarbonate layer
    • Doesn’t suffer from BIREFRINGENCE
    • Doesn’t suffer from DISC TILT
    • Hard coating is placed outside to protect from scratches or fingerprints
    • Data is sandwiched b/w two polycarbonate layers, each 0.6 mm thick
    • Suffer from BIREFRINGENCE
    • Suffer from DISC TILT
    • No hard coating is placed
  • Because Blu-ray uses a blue laser(405 nanometers) instead of a red laser(650 nanometers) this allows the data tracks on the disc to be very compact.
  • CONCLUSION
    • Record HDTV without any quality loss
    • Instantly skip to any spot on disc
    • Record one program while watching other on the disc
    • Create playlists
    • Edit or reorder programs recorded on disc
    • Automatically search for an empty space on the disc to avoid recording over a program
    • Access tHE web to download subtitles and other extra features
  • BIBLOGRAPHY
    WWW.GOOGLE.COM
    WWW.WIKIPEDIA.COM