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INTRODUCTION OF BLU-RAY

DISC

Presented by Khushboo

Career development center

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Table of content

HISTORY

THE NAME

FORMATOF BD

TYPES OF BD THE TECHNOLOGY

COMPARISON WITH DVD IN BEAM SIZE.

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HISTORY

First GenerationCompact disc (CD)-650/700mb

Wavelength of laser which read data-780nm

Color of laser: RED

Second Generation

Digital versatile disc(DVD)-4.77GB

With good quality sound and video than cd

Wavelength is 650nm

Color of laser: RED

continue..

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Third Generation

Blu-ray disc (BD)-25/50 GBNext generation optical disc format developed by blu-ray ,

Association which includes Apple,Hitachi,HP,LG,Panasonic,

Pioneer, Sharp, Sony,Philips,Samsung

Wave length of laser that read data-405nm

Color of laser: Blue-violet

which was developed by Shuji nakamura at NICHIA corporation.

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THE NAME

Its name derived from the underlying technology, which utilizes a

Violet laser.

That read and write data. it's a combination of BLUE blue violet

Laser and RAY "optical ray.According to BDA its not a mistake in spelling of blu-ray character

e was intentionally left out so the terms could be registered as

Trade mark.

Correct abbreviation is BD not BD

R

.

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FORMATOF BD

There are four types of BD formats.

BD-ROM(read only): for reading recorded content.

BD-R(readable): for pc data storage.

BD-RW(rewritable): for pc data storage

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

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TYPES OF BD

SINGLE LAYER-: can hold up to 25/27 gb that means 2 hrs or 13 hrs or

about 13 hrs of standard video.

DOUBLE LAYER-: can hold up to 50gb that means 4.5 hrs or about

20 hrs standard video.

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Comparison CD,DVD HD DVD & Blu-ray disc

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Comparison in beam size

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Comparison in building BD an DVD

BD

Data is placed on top of a 1.1

mm thick polycarbonate layer.

Does not suffer from disc tilt.

Hard coating is placed out side to

protect from scratches or finger

prints.

DVD

Data is sandwich b/w two

polycarbonate layer, each 0.6

mm thick.

Suffer from disc tilt.No such hard coating is placed.

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FEATURESOF BD

With BD we can--:Instantly skip to any spot on disc.

Record any program while watching other on the disc.

Record HDTV without any quality loss.

Create play list.

Edit or reorder programs recorded on the disc.

Automatically reach for an empty on the disc to avoid recording

over the program

Can down load subtitle and other extra features.

AND many more..

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BLU-RAYS Durability

Various hard coating technologies make BLU-RAY DISC must

durable and family friendly.

Hard coating technology provides resistances to:

--Finger prints

--Means--Scratches

--Dust

Much more ROBUST than todays polycarbonate based (CD/DVD)

and( HP DVDS).

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BLU-RAY DENSITY ADVANTAGE

Higher density enables

better data seek time.

Shorter to travel same

amount of data result in thefaster data seek.

Better for random access of

data.

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THANK YOU