bluray_disc_ppt_by_dhruv2_1222350645931113_9

8/6/2019 bluray_disc_ppt_by_dhruv2_1222350645931113_9

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BLU-RAY DISCBy : RAKESH SHARMA

www.powerpointpresentationon.blogspot.com


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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 nmColor of laser: Red 2ndGENERATION:

Digital versatile disc (DVD): --- 4.7 GBIt offers high quality sound and video than CD.Wavelength of laser which reads data: 650 nmColor 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 NAKAMURAat NICHIA CORPORATION


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FORMAT OFBD

It comes in four different formats: BD-ROM(read only) : for reading recorded

content.

BD-R (recordable) : for PC data storage. BD-RW(rewritable) : for PC data storage. BD-RE (rewritable) : for HDTV (high

definition television) recording.


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TYPESOF

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 that

means 4.5 hrs of HD video or morethan 20 hrs of standard video.


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THE TECHNOLOGY

Pits : spiral grooves thatrun from the centre of thedisc to its edges

Bumps : other sides ofthese edges.

Track pitch : it is thedistance between the twotracks (of pits) on the

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 as smallas the pits on DVD )Track-pitch is : 0.32micronsLaser needed : blue-violetlaser (405 nm)Data transfer rate : 36

Mbps


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COMPARISON IN BUILDINGBD AND DVD

BD Data is placed on top of a 1.1

mm thick polycarbonate layer

Doesnt suffer fromBIREFRINGENCE

Doesnt suffer from DISC TILT Hard coating is placed outside

to protect from scratches or

fingerprints

DVD Data is sandwiched b/w two

polycarbonate layers, each 0.6mm thick

Suffer from BIREFRINGENCE

Suffer from DISC TILT

No such hard coating is placed


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BLU RAY S DURABILITYADVANTAGE

Various hard coating technologies make Blu raydisc most durable and family -friendly

Hard-coating technology provides resistance to:

- Finger prints- Marks- Scratches- Dust

Much more ROBUST than todayspolycarbonate-based CD/DVDs (and HD DVDs)


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FEATURES OF BDWith BD we can: Record HDTV without any quality loss Instantly 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 extrafeatures And many more


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BLY-RAYS DENSITYADVANTAGE

Higher densityenables better dataseek times

Shorter to travel forsame amount of dataresults in faster dataseek

Better for randomaccess of data


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THE NAMEThe blu-ray name is a combination of blue,for the color of the laser that is used andray for optical ray.

The e in blue was purposefully left off,according to the manufacturers, because an

everyday word cannot be a trademark.


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On GAURD

Blu-ray discs are better armed thancurrent DVDs. They come equipped witha secure encryption system a unique IDthat protects against video piracy andcopyright infringement.


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DO MORE WITH BLU More capacity, Density and Performance More Industry Support/Consumer Reach

(BDA has 140+ members) More Durable More Interactive User Experience More Flexible Content Protection: AAC,

BD+ Renewability Technology and ROMMark


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Thank You

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bluray_disc_ppt_by_dhruv2_1222350645931113_9