Blu Ray Ppt Final

8/6/2019 Blu Ray Ppt Final

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Blu-ray Disc


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A new generation disc designed to allow for the playing, reading, andwriting of HD video.

Blu-ray is a combination of blue- violet laser (used to read andwrite the data) and optical ray

Developed by the Blu-ray Disc Association, which includesconsumer electronics companies such as Apple, Dell, LG, Disney,

and Sony on its BOD.

Dual layer Blu-ray discs can store 50GB of data, translating toabout 9 hours of HD video and 23 hours of SD video.


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THE OBJECTIVE OF BLU-RAY

THE REQUIRMENT FOR CDs WAS 74 MINUTES OFRECORDING 2-CHANNEL AUDIO SIGNALS ANDCAPACITY OF 800 MB AND FOR DVDs WASRECORDING OF 2 HOURS MOVIE .

IN CASE OF BLU RAY DISC RECORDING OF HDTV

DIGITAL BROADCAST GREATER THAN 2 HOURS WASNEEDED.


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Evolution

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

VHS: analogDVD: digitalBD: high-definition


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Foundation

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

The first blue laser was developed in 1996by Shuji Nakamura (Nichia Corporation)In 2002, an alliance was formed, called theBlu-ray Disc Association, including the likesof Sony, Samsung, Sharp, Hewlett-Packard,

and Royal PhillipsThe e is intentionally left out of the name

due to trademark restrictions


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Blu-Ray

Uses shorter wavelength

405 nm wavelengthinstead of 650 nm red laser

Pits only .15 m

Track pitch .32 m downfrom .74

May be possible to layerbeyond 2 layers

http://www.blu-raydisc.com/


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How does Blu-Ray work?

Like a CD

Reads data from pits indisc's surface with a laser

Shorter wavelength(blue/violet) laser =

smaller pit = more pits per unit area = more data

4-5GB => 25GB


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OpticalStorage

HD

DVD

DVD

CD-R

OM


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Blu-Ray vs other newformats

Primary competition is HD-DVD

Manufactured with same equipment that makes DVDs

Equipment easily compatible with old technology

Less storage capability than blu-ray (20 GB or 30 GB withdual layer)

HD-DVD strongly supported by Toshiba

Blu-ray ahead in the process and strongly backed

Blu-ray products have been featured with both blue andred laser to read DVDs as well as new discs


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What is

An HD DVD has a smaller storage capacity (maximum 90 GB), but HD DVDhas a few opportunities.

- An HD DVD disc has 3 layers : 2 to be read by a blue laser, and 1 to be readby a red laser. This is extremely handy, because with this technology, DVDs

and CDs can also be played in an HD DVD player !- Because the HD DVD technology is more related with the standard DVD, thecost-price for HD DVDs and its players, is a lot less than the price for Blu-ray.


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capacity : SL: 25 GB, DL: 50 GB, MAX:200 GB

cost-price : Blu-ray player: 1199

lasers : only a blue laser

partners : Philips, Sony, Samsung, Apple,

Twentieth Century Fox, Walt DisneyPictures, ...

game console : PlayStation 3

capacity : SL: 15 GB, DL: 30 GB, MAX:90 GB

cost-price : HD DVD player: 499

lasers : a blue and a red laser

partners : Microsoft, Intel, Toshiba, NEC,

Sanyo en Universal Studio's, ...

game console : Xbox 360

Blu-ray & HD DVD: acomparison


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Blu-ray and HD DVD both work with a blue laser. Ablue laser has a wavelength of 405 nm, while a redlaser (standard DVD) has a wavelength of 650 nm.

The shorter wavelength of the blue-violet laserallows the disc to have a much narrower track pitch.

This results in a higher storage-capacity, but moreimportant, in a very high quality-improvement


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COMPARISON OF FORMATS

Click to edit Master text stylesSecond level

Third level Fourth level

Fifth level

Laser wave-lengthdifferent

Blu-Ray and DVD have

more storage capabilitybecause track pitch aresmaller

CD has much older error

correction method, sowastes more space


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Disc Characteristics

Single layer: 25 GBDual layer: 50 GB

Diameter: 120 mm

Thickness: 1.2 mm

Center hole diameter:15 mm

Uses GaNe laser of wavelength 400 nm

The smaller laser,compared to the DVDand CD, keeps theprocess more efficient(~5 mW) Courtesy Blu-ray Disc Founders Blu-ray Disc Format White Paper


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The powerconservation allowsthe development of multi-layer platformsand high-speedrecording

BD-ROM: read-onlyformat

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


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Numerical Aperture measures the ability of a lens togather and focus light. As the numerical apertureincreases, the focusing power increases and the beamsize decreases


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Recorder Characteristics

Over two hours of HDTV can be placed on asingle layer BD, which correlates to over 13

hours for standard TV

The transfer rate is 36 megabits per second

At 1x speed, it takes approximately 1.5

hours to record an entire single layer BD


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Enhancements


Error rates increased in reading and writing after theoriginal BD suffered scratches and fingerprints

For protection, the prototype BD was enclosed in a case

The case increased the size of the disc drive


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Enhancements


A hard coat wasderived of anultraviolet-curableresin that has ascratch resistancesimilar to the DVD

An artificialfingerprint reagentis placed on the discsurface to resistfingerprint oils


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The Future of Blu-Rays

Due to Blu-rays ability to hold significantly more data than DVDs, theyalready have, and will soon completely, replace DVDs as the newstandard for data storage.

Unfortunately, because of its dependence on a blue laser (hence thename Blu-ray), the new technology is much more expensive than itspredecessor, DVD technology.

The benefits of Blu-rays seem to be much greater than thedisadvantages, since Blu-rays still seem to be doing very well in themarkets.

Expect to see continued expansion of Blu-ray technology in the times tocome .


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Fluorescent Multilayer Disc


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What is FMD?

Fluorescent Multilayer disc is an optical disc

that uses fluorescent rather than reflectivematerial to store data.

It is an three dimensional storage discdeveloped by Constellation 3D.

Fluorescent Multilayer Disc


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FMD Principle

Data is stored on multiple layers unlike CDsor DVDs where single layers are used.

Recording, reading and storing is done withhelp of fluorescent materials embedded in pitsin each of the layers.

The fluorescent material emits radiation whenexcited by an external light source.


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: FMD DISC


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FMD Technology

FMD technology, each storage layer is coated witha transparent fluorescent material.

When the laser beam hits a mark on a layer,fluorescent light is emitted.

The light emitted by fluorescent material isincoherent, not being affected by data pits or othermarks in the media, and passes through adjacent datalayers unaltered then letters starts radiating .


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FMD TECHNOLOGY :


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FMD READ DEVICESPARALLEL READING:

A sequence of bits is recorded not along a track but deep into layers. That's why we receive three types of Data reading : successive,successive-parallel and parallel.Reading speed reaches 1 Gigabit/s.


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Comparison of Disc Layers:


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CD vs DVD vs FMD:

PARAMETERS CD DVD FMD1. Discdiameter

120mm 120mm 120mm

2. Capacity 750MB 4GB 50GB+3. Wavelength 780nm 650nm 480-

530nm

4. Distance b/wtracks

1.6micron 0.85micron 0.80micron

5.No.of layers 1 2 12


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ADVANTAGES1. Increased Disk Capacity.2. Quick Parallel Access and Retrieval of

information.3. Usage Flexibility.4. Security.5. Low light absorption in each layer.6. Emitted (signal) fluorescent light not absorbed.7. Compatible with present CD/DVD formats,

having the ability to handle the same data ratesover each of its layers.


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DISADVANTAGES

Initial cost of the fluorescent material ismore than reflective material that is usedin CD,DVD.

This makes the product costlier than otherstorage devices.


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What are the applications of this technology?

Used to store and read lots of data on optical discs

Primarily used to store and read high-definition video, but can be used for anydata

Thus, can be used in computers, camcorders, and computers


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Criticisms of Blu-rays

Blu-ray players are very expensive to purchase,as the average price is over $400.

To achieve the full High Definition qualitypromised of the Blu-ray discs, you must watchthem on TVs that support 1080p resolution,which are much more expensive than theplayers themselves.

There are currently very few movies availablefor purchase on Blu-ray discs.


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CONCLUSION

Mans need for additional storage space issomething that is ever increasing. Hence nosolution or data storage media is expected toachieve the status of a complete storagesolution for long periods of time especially due torapid developments taking place in many storagerelated fields.

But for now the FMD, which can provide us with astaggering 140 GB of storage space seems to be anenticing solution for the storage-hungry masses.

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Bibliography

http://electronics.howstuffworks.com/cd.htm

http://electronics.howstuffworks.com/question655.htm

http://electronics.howstuffworks.com/dvd.htm

http://electronics.howstuffworks.com/blu-ray.htm

http://www.osta.org/technology/pdf/cdr_qa.pdf

http://www.gizmodo.com/archives/sonys-paper-bluray-

discs-009177.phphttp://www.sony.net/SonyInfo/News/Press/200404/04-0415E/

http://www.cddimensions.com/blu-ray/blu-ray.asp

http://stereophile.com/features/374/


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THANK YOU !!!!

Shviam TiwariShvetank Tripathi

Siddhant Gaur

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