Bluray Seminar

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    A Seminar on

    Blu-rayDisc

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    Evolution

    VHS: analogDVD: digitalBD: high-definition

    Enablesrecording,rewriting, andplayback of high-definition video

    Capable ofstoringinformation thatthe DVD and CD

    are not capable

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    Foundation

    Blu-ray disc (BD) is appropriately namedafter the blue laser used to write thedata

    The first blue laser was developed in1996 by Shuji Nakamura (NichiaCorporation)

    In 2002, an alliance was formed, called

    the Blu-ray Disc Association, includingthe likes of Sony, Samsung, Sharp,Hewlett-Packard, and Royal Phillips

    The e is intentionally left out of the

    name due to trademark restrictions

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    Introduction

    What is Blu-ray?Blu-ray, also known as Blu-ray Disc (BD) is the name ofa next-generation optical

    disc format. The format wasdeveloped to enablerecording, rewriting andplayback of high-definitionvideo (HD). The format is

    also likely to become astandard for PC datastorage and high-definitionmovies in the future.

    Why the name Blu-ray?

    The name Blu-ray is derivedfrom the underlying technology,which utilizes a blue-violet laser

    to read and write data. Thename is a combination of "Blue"(blue-violet laser) and "Ray"(optical ray). According to theBlu-ray Disc Association the

    spelling of "Blu-ray" is not amistake, the character "e" wasintentionally left out so the termcould be registered as atrademark.

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    Disc Characteristics

    Single layer: 25 GBDual layer: 50 GB

    Diameter: 120 mm

    Thickness: 1.2 mm

    Center holediameter: 15 mm

    Uses GaN laser ofwavelength 400 nm

    The smaller laser,

    compared to theDVD and CD, keepsthe process moreefficient (~5 mW)

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    Type Blu-ray DVD CD

    Capacity

    Single Layer

    Dual Layer

    Wavelength

    Numerical Aperture

    Data Transfer RateThickness

    Recording Method

    Protection layer

    Hard Coating

    25GB

    50GB

    405nm

    0.85

    36Mbps1.2mm

    Phasechange

    0.1mm

    Yes

    4.7GB

    8.5GB

    635nm

    0.6

    10.5Mbps1.2mm

    Phasechange

    0.6mm

    No

    700MB

    -

    780nm

    0.45

    1.17Mbps1.2mm

    Phasechange

    1.2mm

    No

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    Type Blu-ray DVD CD

    Capacity

    Single Layer

    Dual Layer

    Wavelength

    Numerical Aperture

    Data Transfer RateThickness

    Recording Method

    Protection layer

    Hard Coating

    25GB

    50GB

    405nm

    0.85

    36Mbps1.2mm

    Phasechange

    0.1mm

    Yes

    4.7GB

    8.5GB

    635nm

    0.6

    10.5Mbps1.2mm

    Phasechange

    0.6mm

    No

    700MB

    -

    780nm

    0.45

    1.17Mbps1.2mm

    Phasechange

    1.2mm

    No

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    Recorder Characteristics

    Over two hours of HDTV can be placedon a single layer BD, which correlates toover 13 hours for standard TV

    The transfer rate is 36 megabits persecond

    At 1x speed, it takes approximately 1.5

    hours to record an entire single layer BD At the speed of 8x it would require 12

    min to read or write 25GB of data on aBD disc.

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    Key Features of Blu-ray

    Maximum picture resolution. Largest capacity available anywhere (25 GB

    single layer/50 GB dual layer).

    Best audio possible.

    Enhanced interactivity.

    Broadest industry support from brands you

    trust.

    The largest selection of high-def playback Backward compatibility**.

    Disc robustness.

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    Application

    * Backward Compatibility

    * Stand-alone recorders and

    * game consoles

    * PC data storage* Corporate support

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    Blu-ray vs. HD DVD

    Courtesy

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    There are several important

    difference between the Blu-ray andHD-DVD format but the importantdifference between the two are 3important key ones:

    * Capacity* Codec

    * Hardware Support

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    Companies Associated with Blu-ray Disc

    1) Apple Computer, Inc.2) Dell Inc.3) Hewlett Packard Company4) Hitachi, Ltd.5) LG Electronics Inc.6) Matsushita Electric Industrial Co., Ltd.

    7) Mitsubishi Electric Corporation8) Pioneer Corporation9) Royal Philips Electronics10) Samsung Electronics Co., Ltd.11) Sharp Corporation12) Sony Corporation13) TDK Corporation14) Thomson Multimedia15) Twentieth Century Fox16) Walt Disney Pictures

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    Blu-Ray Players

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    Blu-Ray Recorders

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    Medias of Blu-ray

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    Protection System

    HDTV contains a copyright bit that isdetected by the BD recorder. If thebroadcast has no copyright bit, then the

    BD recorder is allowed to store theinformation

    Uses the Data Encryption Standard

    (DES) that has a key length of 56 bits A Key Block and Disc ID are written into

    the ROM area to prevent illegal copying

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    EnhancementsEnhancements

    Error rates increased in reading and writingError rates increased in reading and writingafter the original BD suffered scratches andafter the original BD suffered scratches and

    fingerprintsfingerprints

    For protection, the prototype BD was enclosedFor protection, the prototype BD was enclosedin a casein a case

    The case increased the size of the disc driveThe case increased the size of the disc drive

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    EnhancementsEnhancements

    A hard coat was derived of an ultraviolet-A hard coat was derived of an ultraviolet-curable resin that has a scratch resistancecurable resin that has a scratch resistance

    similar to the DVDsimilar to the DVD

    An artificial fingerprint reagent is placed onAn artificial fingerprint reagent is placed onthe disc surface to resist fingerprint oilsthe disc surface to resist fingerprint oils

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    FutureFuture

    Expect the BD to become moreExpect the BD to become moreprevalent once the HDTV marketprevalent once the HDTV market

    establishes its presenceestablishes its presence Audio and video will reach higherAudio and video will reach higher

    qualities with larger storage spacequalities with larger storage space

    Look for BD with more than twoLook for BD with more than twolayers as the technology is furtherlayers as the technology is further

    refinedrefined

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    Blu-RayBlu-Ray

    For Further InformationFor Further Information

    Log on toLog on to

    http://www.blu-ray.com/info/ttp://www.blu-ray.com/info/ http://www.blu-raydisc.info/ttp://www.blu-raydisc.info/ www.blu-raydisc.infoww.blu-raydisc.info www.sonypictures.com/homevideo/ww.sonypictures.com/homevideo/blurayluray

    http://www.blu-ray.com/info/http://www.blu-ray.com/info/http://www.blu-ray.com/info/
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    ??

    Any QueriesAny Queries

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    Thank YouThank You

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