Bluray Disc Ppt by Ramya Kalki

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    BLU-RAY DISCBy: Ramya Kalki

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    HISTORY

    1stGENERATION:

    Compact disc (CD): --- 650/700 MB

    It is with us for over 20 years.Wavelength of laser which reads data: 780 nm

    Color of laser: Red

    2ndGENERATION:

    Digital versatile disc (DVD): --- 4.7 GB

    It offers high quality sound and video than CD.

    Wavelength of laser which reads data: 650 nm

    Color of laser: Red

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    HISTORY

    3rdGENERATION:

    Blu-ray disc (BD): --- 25/50 GB

    -Next generation optical disc format.

    -Developed by blu-ray disc association (which includes Apple, Hitachi,HP, LG, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony)

    -Wavelength of laser which reads data: 405 nm

    -Color of laser: Blue-violetwhich was developed by

    SHUJI NAKAMURA

    at NICHIA CORPORATION

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    FORMAT OF BD

    It comes in four different formats:

    BD-ROM(read only) : for reading recordedcontent.

    BD-R(recordable) : for PC data storage.

    BD-RW(rewritable) : for PC data storage.

    BD-RE(rewritable) : for HDTV (high definitiontelevision) recording.

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    TYPES OF BD:

    SINGLE LAYER:

    - Can hold data up to 25/27 GB that

    means 2 hrs of HD video or about13 hrs of standard video.

    DOUBLE LAYER:

    -

    Can hold data up to 50 GB thatmeans 4.5 hrs of HD video or more

    than 20 hrs of standard video.

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    THE TECHNOLOGY

    Pits: spiral grooves thatrun from the centre ofthe disc to its edges

    Bumps: other sides ofthese edges.

    Track pitch: it is thedistance between thetwo tracks (of pits) onthe surface.

    --------------------------------Disc store digitallyencoded data in PITS.

    --------------------------------

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    THE TECHNOLOGY

    So, in blu-ray disc:

    Pit size 0.15 microns (

    more than twice assmall as the pits on

    DVD )Track-pitch is: 0.32 microns

    Laser needed:blue-violet

    laser(405 nm)

    Data transfer rate: 36 Mbps

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    COMPARISON IN BUILDINGCOMPARISON IN BUILDINGBD AND DVDBD AND DVD

    BD

    Data is placed on top of a1.1 mm thickpolycarbonate layer

    Doesnt suffer fromBIREFRINGENCE

    Doesnt suffer from DISC

    TILT Hard coating is placed

    outside to protect fromscratches or fingerprints

    DVD

    Data is sandwiched b/wtwo polycarbonate layers,each 0.6 mm thick

    Suffer fromBIREFRINGENCE

    Suffer from DISC TILT

    No such hard coating isplaced

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    BLU RAY S DURABILITY BLU RAY S DURABILITY

    ADVANTAGEADVANTAGE

    Various hard coating technologies make Bly rayVarious hard coating technologies make Bly ray

    disc most durable and familydisc most durable and family --friendlyfriendly

    HardHard--coating technology provides resistance to:coating technology provides resistance to:

    -- Finger printsFinger prints

    -- MarksMarks

    -- ScratchesScratches

    -- DustDust

    Much more ROBUST than todaysMuch more ROBUST than todays

    polycarbonatepolycarbonate--based CD/DVDs (and HD DVDs)based CD/DVDs (and HD DVDs)

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    FEATURES OFBDFEATURES OFBDWith BD we can: Record HDTV without any quality lossInstantly 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 to web to download subtitles and other

    extra features And many more

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    BLYBLY--RAYS DENSITYRAYS DENSITYADVANTAGEADVANTAGE

    Higher densityenables better dataseek times

    Shorter to travelfor same amountof data results infaster data seek

    Better for randomaccess of data

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    THE NAMETHE NAMEThe blu-ray name is a combination ofblue, for the color of the laser thatis used and ray for optical ray.

    The e in blue was purposefully leftoff, according to the manufacturers,because an everyday word cannot bea trademark.

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    On GAURDOn GAURD

    Blu-ray discs are better armed thancurrent DVDs. They come equippedwith a secure encryption system aunique ID that protects against videopiracy and copyright infringement.

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    DO MORE WITHBLUDO MORE WITHBLU

    More capacity, Density andPerformance

    More Industry Support/ConsumerReach (BDA has 140+ members)

    More Durable

    More Interactive User Experience

    More Flexible Content Protection:AAC, BD+ Renewability Technologyand ROMMark

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    Thank YouThank You