Bluray Disc Ppt by Ramya Kalki

8/6/2019 Bluray Disc Ppt by Ramya Kalki

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BLU-RAY DISCBy: Ramya Kalki


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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 nm

Color of laser: Red

2ndGENERATION:

Digital versatile disc (DVD): --- 4.7 GB

It offers high quality sound and video than CD.

Wavelength of laser which reads data: 650 nm

Color 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 NAKAMURA

at NICHIA CORPORATION


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FORMAT OF BD

It comes in four different formats:

BD-ROM(read only) : for reading recordedcontent.

BD-R(recordable) : for PC data storage.

BD-RW(rewritable) : for PC data storage.

BD-RE(rewritable) : for HDTV (high definitiontelevision) recording.


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TYPES OF 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 thatmeans 4.5 hrs of HD video or more

than 20 hrs of standard video.


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THE TECHNOLOGY

Pits: spiral grooves thatrun from the centre ofthe disc to its edges

Bumps: other sides ofthese edges.

Track pitch: it is thedistance between thetwo tracks (of pits) onthe 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 assmall as the pits on

DVD )Track-pitch is: 0.32 microns

Laser needed:blue-violet

laser(405 nm)

Data transfer rate: 36 Mbps


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COMPARISON IN BUILDINGCOMPARISON IN BUILDINGBD AND DVDBD AND DVD

BD

Data is placed on top of a1.1 mm thickpolycarbonate layer

Doesnt suffer fromBIREFRINGENCE

Doesnt suffer from DISC

TILT Hard coating is placed

outside to protect fromscratches or fingerprints

DVD

Data is sandwiched b/wtwo polycarbonate layers,each 0.6 mm thick

Suffer fromBIREFRINGENCE

Suffer from DISC TILT

No such hard coating isplaced


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BLU RAY S DURABILITY BLU RAY S DURABILITY

ADVANTAGEADVANTAGE

Various hard coating technologies make Bly rayVarious hard coating technologies make Bly ray

disc most durable and familydisc most durable and family --friendlyfriendly

HardHard--coating technology provides resistance to:coating technology provides resistance to:

-- Finger printsFinger prints

-- MarksMarks

-- ScratchesScratches

-- DustDust

Much more ROBUST than todaysMuch more ROBUST than todays

polycarbonatepolycarbonate--based CD/DVDs (and HD DVDs)based CD/DVDs (and HD DVDs)


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FEATURES OFBDFEATURES OFBDWith BD we can: Record HDTV without any quality lossInstantly 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

extra features And many more


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BLYBLY--RAYS DENSITYRAYS DENSITYADVANTAGEADVANTAGE

Higher densityenables better dataseek times

Shorter to travelfor same amountof data results infaster data seek

Better for randomaccess of data


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THE NAMETHE NAMEThe blu-ray name is a combination ofblue, for the color of the laser thatis used and ray for optical ray.

The e in blue was purposefully leftoff, according to the manufacturers,because an everyday word cannot bea trademark.


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On GAURDOn GAURD

Blu-ray discs are better armed thancurrent DVDs. They come equippedwith a secure encryption system aunique ID that protects against videopiracy and copyright infringement.


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DO MORE WITHBLUDO MORE WITHBLU

More capacity, Density andPerformance

More Industry Support/ConsumerReach (BDA has 140+ members)

More Durable

More Interactive User Experience

More Flexible Content Protection:AAC, BD+ Renewability Technologyand ROMMark


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Thank YouThank You

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Bluray Disc Ppt by Ramya Kalki