bluray seminar
TRANSCRIPT
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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
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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
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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