Blu Ray Disc Seminar

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Seminar Seminar onon

Blu-ray DiscBlu-ray Disc

October 11, 2008October 11, 2008

Er. Rajesh KumarEr. Rajesh Kumar

M.Tech (ECE)M.Tech (ECE)

INDIAINDIA

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EvolutionEvolution

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

VHS: analogVHS: analogDVD: digitalDVD: digitalBD: high-definitionBD: high-definition

Enables recording, Enables recording, rewriting, and rewriting, and playback of high-playback of high-definition videodefinition video

Capable of storing Capable of storing information that information that the DVD and CD the DVD and CD are not capable of are not capable of holdingholding

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FoundationFoundation Blu-ray disc (BD) is appropriately named Blu-ray disc (BD) is appropriately named

after the blue laser used to write the dataafter the blue laser used to write the data The first blue laser was developed in The first blue laser was developed in

1996 by Shuji Nakamura (Nichia 1996 by Shuji Nakamura (Nichia Corporation)Corporation)

In 2002, an alliance was formed, called In 2002, an alliance was formed, called the Blu-ray Disc Association, including the the Blu-ray Disc Association, including the likes of Sony, Samsung, Sharp, Hewlett-likes of Sony, Samsung, Sharp, Hewlett-Packard, and Royal PhillipsPackard, and Royal Phillips

The “e” is intentionally left out of the The “e” is intentionally left out of the name due to trademark restrictionsname due to trademark restrictions

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Disc CharacteristicsDisc Characteristics Single layer: 25 GBSingle layer: 25 GB

Dual layer: 50 GBDual layer: 50 GB Diameter: 120 mmDiameter: 120 mm Thickness: 1.2 mmThickness: 1.2 mm Center hole Center hole

diameter: 15 mmdiameter: 15 mm Uses GaN laser of Uses GaN laser of

wavelength 400 nmwavelength 400 nm The smaller laser, The smaller laser,

compared to the compared to the DVD and CD, keeps DVD and CD, keeps the process more the process more efficient (~5 mW)efficient (~5 mW)


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Disc Disc Characteristics(conti.)Characteristics(conti.)


The power The power conservation allows conservation allows the development of the development of multi-layer multi-layer platforms and high-platforms and high-speed recording.speed recording.

BD-ROM: read-only BD-ROM: read-only format.format.

BD-R and BD-RE: BD-R and BD-RE: recordable formats recordable formats (RE: rewritable; R: (RE: rewritable; R: recordable once)recordable once)

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Disc CharacteristicsDisc Characteristics


Numerical Aperature measures the ability of a lens to gather and Numerical Aperature measures the ability of a lens to gather and focus light. As the numerical aperture increases, the focusing focus light. As the numerical aperture increases, the focusing power increases and the beam size decreases.power increases and the beam size decreases.

Phase change implies that the disc section is either an amorphous Phase change implies that the disc section is either an amorphous or crystalline state. The reflectivity changes accordingly thus or crystalline state. The reflectivity changes accordingly thus representing a binary bit.representing a binary bit.

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Comparison: Comparison: CD, DVD & Blu-CD, DVD & Blu-ray Discray Disc

Due to the fact that the data layer on a Blu-Due to the fact that the data layer on a Blu-ray Disc is placed much “closer” to the laser ray Disc is placed much “closer” to the laser lens than in DVD , there is less distortion lens than in DVD , there is less distortion resulting in significantly improved resulting in significantly improved tolerances. Hence, more precision and ultra tolerances. Hence, more precision and ultra high storage densities are made possible.high storage densities are made possible.

Courtesy <http://www.jvc-victor.co.jp/english/press/2004/bd-dvd.html>

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Recorder CharacteristicsRecorder Characteristics Over two hours of HDTV can be placed on a single Over two hours of HDTV can be placed on a single

layer BD, which correlates to over 13 hours for layer BD, which correlates to over 13 hours for standard TV.standard TV.

The transfer rate is 36 megabits per second.The transfer rate is 36 megabits per second.

At 1x speed, it takes approximately 1.5 hours to At 1x speed, it takes approximately 1.5 hours to record an entire single layer BD.record an entire single layer BD.

Recorder Cost: $1,500 - $2,500; BD Cost: $26.Recorder Cost: $1,500 - $2,500; BD Cost: $26.

BD’s are commercially available in the U.S. since 2006.BD’s are commercially available in the U.S. since 2006.

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Capacity ComparisonCapacity Comparison

“Courtesy: How Stuff Works”

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CompatibilityCompatibility

Courtesy <http://www.jvc-victor.co.jp/english/press/2004/bd-dvd.html>

This issue has introduced a competitor, the HD-DVD, that based its This issue has introduced a competitor, the HD-DVD, that based its technology around being compatible with the DVD.technology around being compatible with the DVD.

Recently the BDA has developed recorders that are BD/DVD/CD Recently the BDA has developed recorders that are BD/DVD/CD compatible.compatible.

JVC has advanced the BD by developing a BD/DVD combo disc that JVC has advanced the BD by developing a BD/DVD combo disc that stores both DVD and BD data. It is composed of two DVD layers and a stores both DVD and BD data. It is composed of two DVD layers and a third BD layer storing 33.5 GB total.third BD layer storing 33.5 GB total.

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Protection SystemProtection System

HDTV contains a copyright bit that is HDTV contains a copyright bit that is detected by the BD recorder. If the detected by the BD recorder. If the broadcast has no copyright bit, then the broadcast has no copyright bit, then the BD recorder is allowed to store the BD recorder is allowed to store the information.information.

Uses the Data Encryption Standard Uses the Data Encryption Standard (DES) that has a key length of 56 bits.(DES) that has a key length of 56 bits.

A Key Block and Disc ID are written into A Key Block and Disc ID are written into the ROM area to prevent illegal copying.the ROM area to prevent illegal copying.

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EnhancementsEnhancements


Error rates increased in reading and writing after Error rates increased in reading and writing after the original BD suffered scratches and fingerprints.the original BD suffered scratches and fingerprints.

For protection, the prototype BD was enclosed in a For protection, the prototype BD was enclosed in a case.case.

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

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Enhancements(conti.)Enhancements(conti.)


A hard coat was A hard coat was derived of an derived of an ultraviolet-ultraviolet-curable resin that curable resin that has a scratch has a scratch resistance similar resistance similar to the DVD.to the DVD.

An artificial An artificial fingerprint fingerprint reagent is placed reagent is placed on the disc on the disc surface to resist surface to resist fingerprint oils.fingerprint oils.

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Features of BLU-RAY DiscFeatures of BLU-RAY Disc--------------------------------------------------------------------------

MANUFACTURINGMANUFACTURING

RECORDINGRECORDING

PLAY BACKPLAY BACK

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ManufacturingManufacturing* BD Cover Manufacturing Process* BD Cover Manufacturing Process


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Recording & PlaybackRecording & Playback


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Address Format Address Format *Using Groove Wobbles*Using Groove Wobbles


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Write pulse waveformWrite pulse waveform


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Write strategyWrite strategy


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CODING FOR BD OPTICAL CODING FOR BD OPTICAL RECORDINGRECORDING


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Modulation code and error Modulation code and error correcting codecorrecting code

FOR DIGITAL STORAGE SYSTEMFOR DIGITAL STORAGE SYSTEM


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Error distributionsError distributions For 50GB CapacityFor 50GB Capacity


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FutureFuture

Expect the BD to become more Expect the BD to become more prevalent once the HDTV market prevalent once the HDTV market establishes its presence.establishes its presence.

Audio and video will reach higher Audio and video will reach higher qualities with larger storage space.qualities with larger storage space.

Look for BD with more than two layers Look for BD with more than two layers as the technology is further refined.as the technology is further refined.

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Sony has made the Disc with size Sony has made the Disc with size 200GB already.200GB already.

Pioneer announced on August 5, 2008 Pioneer announced on August 5, 2008 , that they have got success , that they have got success

in making BD with in making BD with

increased Disc Sizeincreased Disc Size

of 500GB.of 500GB.

Future(conti.)Future(conti.)

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Commercial MarketCommercial MarketBlu-ray drivesBlu-ray drives


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Blu-ray MediaBlu-ray Media


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Blu-ray RecordersBlu-ray Recorders


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http://http://www.digitaljournal.comwww.digitaljournal.com/article/254136/article/254136 http://http://www.blu-ray.comwww.blu-ray.com/news/?id=1616, /news/?id=1616, http://http://www.docstoc.comwww.docstoc.com/docs/424938/White-paper-/docs/424938/White-paper-

General-Blu-ray-Disc-FormatGeneral-Blu-ray-Disc-Format http://http://allfreedownloadlinks.comallfreedownloadlinks.com/free-softwares/free-/free-softwares/free-

multimedia-software/blu-ray- to-dvd-pro-v120/multimedia-software/blu-ray- to-dvd-pro-v120/ http://http://reviews.cnet.comreviews.cnet.com/1770-9991_7-0.html?query= /1770-9991_7-0.html?query=

blu+ray+disc&searchtype=products&tag=ltcol;narrblu+ray+disc&searchtype=products&tag=ltcol;narrowow

http://http://en.wikipedia.orgen.wikipedia.org/wiki/Blu-ray_Disc# /wiki/Blu-ray_Disc# Technical_specificationsTechnical_specifications

http://http://www.thefreelibrary.comwww.thefreelibrary.com/_/search//_/search/Search.aspx? Search.aspx?

SearchBy=0&Word=blu+ray+disc&By=0SearchBy=0&Word=blu+ray+disc&By=0

BibliographyBibliography

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ENDEND OF THE OF THE

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