Blu Ray Tech Ppt

8/2/2019 Blu Ray Tech Ppt

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Copyright Wondershar

Blu-RayBlu-Ray

TechnologyTechnology

PRESENTEDBY:

K.SWETHAREDDY


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CONTENTSCONTENTS

1. Introduction

2. Data storage techniques

3. Comparision of storagetechnologies

4. Characteristics of Blu-ray disc

5. Principal BD Specifications

6. Applications

7. Conclusion


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INTRODUCTIONINTRODUCTIONBlu-ray (BD) is a next-generation optical

disc format.

The format was developed to enablerecording, rewriting and playback ofhigh-definition video (HD), as well asstoring large amounts of data.

The name Blu-ray was derived fromtechnology which utilizes a blue violet

laser to read and write data on Blu-ray


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(Contd)(Contd)The companies that have jointly

established the BD specificationsare:

Hitachi, Ltd

LG Electronics

Matsushitha Electrical Industrial Co. Ltd

Mitsubishi Electric CorporarionPioneer CorporationSamsung Electronics Co. LtdSonyThomson


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DATA STORAGEDATA STORAGE

TECHNIQUE:TECHNIQUE: A blue-violet laser of wavelength (450 nm) is employed

on Blu-ray disc.

By employing such short wavelength Blu-ray discsuccessfully minimizes beam spot size INCREASINGlenss NA 0.85 .


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Comparision of storagetechnologies



CHARACTERISTICS OFCHARACTERISTICS OF

BLU-RAYBLU-RAYLife Span

Content Protection

Cost

Capacity

Robustness of disc

Compatible



Life SpanLife Span

Blu-ray disc have larger life spanthan any ordinary disc any wherebetween 10 to (unlikely) 250 year.

It is because of recordable materialused in Blu-ray disc i.e

combination of Si and Cu.

Blu ray recordable media is a

combination of a layer of silicon and



Content ProtectionContent ProtectionStrongest content and copy

protection schemes ever developed

Incorporation of Robust copymechanism

DRM (Digital Right Management)isthe copyright protection scheme themedia industry uses to prevent

piracy.CostLong term Profitability model forcontent ProvidersCheapest Production cost



CapacityCapacity

A single-layer disc can hold up to 25 gigabytes ofinformation, while a dual-layer disc can hold up to50 gigabytes of information.

Future versions of Blu-ray discs may hold up to200 gigabytes of Information.

It is enough to put 2.5 hours of HDTV recording onit. It also can record over 13 hours of standard TVbroadcasting.



Robustness of DiscRobustness of Disc

Hard coating on Blu ray offerStronger resistance to scratches andfingerprints .The protective layer ishard enough to prevent accidentalabrasions and allows fingerprints tobe removed by wiping the disc with atissue.

ompatibleThe BD drives are designed to be

backwardcompatible, i.e. CDs and DVDs workequally well with the BD drives.



SpecificationsCapacity 23.3 25 27GB

(single layer)Wave length of the

laser405nm

Numerical Apertureof the objectivelens

0.85

Data transfer rate 36Mbps

Thickness of thedisc

1.2mm

Diameter of thecenter hole

15mm



Comparison of CD,DVD and B DComparison of CD,DVD and B D

specificationspecification

Parameter CD DVDDisk diameter 120 mm 120 mmDisk thickness 1.2 mm 1.2 mmLaser wavelength 780 nm 650 nm 4

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

8.5 GB (2L)

1 7 GB (2L/2S)


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Blu-ray DiscBlu-ray Disc

ApplicationsApplicationsHigh definition television recording

High definition video distribution

Mass data storage


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ConclusionConclusion

Blu ray is expected to replace VCRsand DVD recorders over the comingyears, with the transition to HDTV.

THANK YOU

Blu Ray Tech Ppt

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