Blue-ray slide show

8/7/2019 Blue-ray slide show

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S.Elavarasan

PAPERPRESENTATION ON

BLU RAY DISC


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CONTENTS1. Introduction

2. Characteristics of Blu-ray disc

3. Specification of Blu-ray disc

4. Comparision of storage technologies

5. Applications

6. Conclusion


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INTRODUCTION

Blu-ray (BD) is a next-generation optical discformat.

The format was developed to enablerecording, rewriting and playback of high-definition video (HD), as well as storing largeamounts of data.

The first blue laser was developed in 1996 byShuji Nakamura (Nichia Corporation)

In 2002, an alliance was formed, called theBlu-ray Disc Association, companies thathave jointly established the BD specifications


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(Contd) Pioneer Corporation

Samsung Electronics Co. Ltd

Sony

Thomson Royal Phillips Electronics

Sharp Corporation

The name Blu-ray is derived from the blue-violet laser it uses to read and write to the disc.

The e was intentionally left out of the namedue to trademark restrictions


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CHARACTERISTICS OF

BLU-RAY Life Span

Content Protection

Cost Capacity

Robustness of disc

Compatible


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Life Span In the case of ordinary discs, the disc life is less .

In the rewritable versions, as re-writing is donerepeatedly to one area of the disc most probably,the inner perimeter limiting the disc life.

BDFS (Blu-ray Disc File Structure is designed so asto avoid this problem, by using a system that usesfree disc spaces with equal frequency


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Content Protection

Strongest content and copy protectionschemes ever developed

Incorporation of Robust copy mechanism

Cost

ng term Profitability model for contentroviderseapest Production cost


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Capacity

The Blu-ray disc enables the recording,rewriting and playback of HD video up to 27GB of data on a single sided single layer. It is

enough to put 2.5 hours of HDTV recordingon it. It also can record over 13 hours ofstandard TV broadcasting


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Robustness of Disc

Stronger resistance to scratches andfingerprints The protective layer is hardenough to prevent accidental abrasions andallows fingerprints to be removed by wiping

the disc with a tissue.

Compatible

The BD drives are designed to bebackwardcompatible, i.e. CDs and DVDs workequally well with the BD drives.


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Click to edit Master text styles

Second level Third level Fourth level Fifth level


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Principal BDSpecificationsCapacity 23.3 25 27GB

(single layer)Wave length of

the laser405nm

NumericalAperture of theobjective lens

0.85

Data transfer rate 36Mbps

Thickness of thedisc

1.2mm

Diameter of thecenter hole

15mm

Recording method Phase change


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Comparison of CD,DVD and B

D specificationParameter CD DVDDisk diameter 120 mm 120 mmDisk thickness 1.2 mm 1.2 mmLaser wavelength 780 nm 650 nm

Numerical aperture 0.45 0.60Minimum pit length 0.83 um 0.4 um 0Data rate 1.2 Mb/sec 11 Mb/sec 36 Mb/secNumber of sides one -----Number of data layers One -----Data capacity ~680 MB 4.7 GB (1L) 27

8.5 GB (2L)

1 7 GB (2L/2S)


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Blu-ray disc andCDs /DVDs 1 DVD = 5 to 10 CDs

1 Blu-ray = 5 to 10 DVDs !!!!!!

Usage of a blue instead of a red laser

Improved lens specifications

Backward compatibility

(Comparison Between Blu-ray n oth


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HDTV contains a copyright bit thatis detected by the BD recorder. If

the broadcast has no copyright bit,then the BD recorder is allowed tostore the informationUses the Data Encryption Standard(DES) that has a key length of 56bitsA Key Block and Disc ID are writteninto the ROM area to prevent illegalcopying

Protection System


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Blu-ray DiscApplications

High definition television recording

High definition video distribution

High definition camcorder archiving

Mass data storage


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High definition

television recording The Blu-ray Disc format offers consumers theability to record their High Definitiontelevision broadcasts in their original qualityfor the first time, preserving the pure picture

and audio level as offered by thebroadcaster.

Next level in home entertainment, offering anunsurpassed user experience Since Blu-rayDisc format incorporates the strongest copy

protection algorithms of any format orproposal to date, the format allows forrecording of digital broadcasts while meetingthe content protection demands of thebroadcast industry.


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High Definition Video

Distribution Blu-ray Disc format can store High Definition video

in the highest possible quality, without need tocompromise on picture quality.

Depending on the encoding method, there is roomfor more than seven hours of the highest HDquality video. There is even room for additionalcontent such as special features and other bonusmaterial to accompany the High Definition movie.

The Blu-ray Disc movie format greatly expands ontraditional DVD capabilities, by incorporating manynew interactive features allowing contentproviders to offer an even more incredibleexperience to consumers.


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High Definition

Camcorder Archiving

With its unprecedented storage capacity,allows for the HD video recorded with an HDcamcorder to be converted and recorded

Storage capabilities, without the risk of tape

wear

M D S


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Mass Data Storage

The growing number of broadbandconnections allowing consumers to download

vast amounts of data


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Conclusion

Very soon BDs will replace CDs and DVDs

THANK YOU

S Elavarasan

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