WELCOMEWELCOME

1 GENERATION:1 GENERATION:

Compact Disc (CD)Compact Disc (CD) :- capacity :- capacity 650/700MB650/700MB

Wave length of laser which reads data : Wave length of laser which reads data : 780nm780nm

Colour of laser : Colour of laser : RedRed

HISTORYHISTORY

2 GENERATION:2 GENERATION:

Digital Versatile Disc (DVD)Digital Versatile Disc (DVD) :- capacity :- capacity 4.7GB4.7GB

Wavelength of laser which reads data : Wavelength of laser which reads data : 650nm650nm

Colour of laser : Colour of laser : RedRed

3 GENERATION:3 GENERATION:

Blu ray Disc (BD)Blu ray Disc (BD) :- capacity :- capacity 25/50 GB25/50 GB

wavelength of laser which reads data : wavelength of laser which reads data : 405 nm405 nm

colour of laser : colour of laser : Blue- violetBlue- violet

which was developed in 1996 bywhich was developed in 1996 by SHUJI NAKAMURASHUJI NAKAMURA

at at NICHIA CORPORATIONNICHIA CORPORATION

THE NAMETHE NAME

The Blu ray name is a combination of The Blu ray name is a combination of ““BlueBlue” for the colour of the laser is used ” for the colour of the laser is used and the “and the “rayray” for optical ray” for optical ray..

TYPES OF BDTYPES OF BD

SINGLE LAYER:SINGLE LAYER:

Can hold data upto Can hold data upto 25/27 GB25/27 GB that means that means 2hrs 2hrs of HD video or about of HD video or about 13hrs13hrs of standard of standard video.video.

DOUBLE LAYER:DOUBLE LAYER:

Can hold data upto Can hold data upto 50GB 50GB that means that means 4.5hrs4.5hrs of HD video or more than of HD video or more than 20hrs20hrs of standard of standard video.video.

FORMATS OF BDFORMATS OF BD

It comes in 4 different formats:It comes in 4 different formats:

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

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

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

BD – REBD – RE (rewritable):- for HDTV (High Definition (rewritable):- for HDTV (High Definition Television) recording.Television) recording.

ADVANTAGES:ADVANTAGES: Hard coating technologies make Blu ray Disc most Hard coating technologies make Blu ray Disc most durabledurable and family- friendly. and family- friendly.

Hard coating technology provides resistance to:-Hard coating technology provides resistance to:-

Finger printsFinger prints MarksMarks ScratchesScratches DustDust

Much more ROBUST than today’s polycarbonate – Much more ROBUST than today’s polycarbonate – based CD/DVD (and HD DVD’s) based CD/DVD (and HD DVD’s)

ON GUARDON GUARD

It uses Data Encryption Standard (DES) that It uses Data Encryption Standard (DES) that has a key length of 56bits.has a key length of 56bits.

A key block and disc ID are written into the A key block and disc ID are written into the ROM area to prevent illegal copying.ROM area to prevent illegal copying.

BDA :(Blu ray Disc Association)BDA :(Blu ray Disc Association) This association develops and licences This association develops and licences Blu ray Disc technology. (in 2002)Blu ray Disc technology. (in 2002)

Blu ray MoviesBlu ray Movies

FEATURES OF BD:FEATURES OF BD:

With BD we can :-With BD we can :-

Record HDTV without any quality loss.Record HDTV without any quality loss.

Instantly skip to any spot on disc.Instantly skip to any spot on disc.

Record on one program while watching other on Record on one program while watching other on the disc.the disc.

Create play list.Create play list.

Automatically search for an empty space on theAutomatically search for an empty space on the

disc to avoid recording over a program.disc to avoid recording over a program.

PRESENTED BY:PRESENTED BY:

CHRISTINE JOSE KCHRISTINE JOSE K

MCA DepartmentMCA Department

Vidya Academy of Science and Techonology Vidya Academy of Science and Techonology

Thalakkottukara P.O, Thrissur, Kerala, India, Thalakkottukara P.O, Thrissur, Kerala, India,

Pin:680 501.Pin:680 501.

THANK YOU……THANK YOU……