Table of ContentTable of ContentHISTORYHISTORY

THE NAMETHE NAME

FORMAT OF BDFORMAT OF BD

TYPE OF BDTYPE OF BD

THE TECHNOLOGYTHE TECHNOLOGY

COMPARISON IN BUILDING BD AND COMPARISON IN BUILDING BD AND DVDDVD

COMPARISON IN BEAM SIZECOMPARISON IN BEAM SIZE

CD VS. DVD VS. HD-DVD VS. BLU-CD VS. DVD VS. HD-DVD VS. BLU-RAY DISCRAY DISC

FEATURES OF BDFEATURES OF BD

BLU-RAY’S DURABILITY ADVANTAGEBLU-RAY’S DURABILITY ADVANTAGE

BLU-RAY DENSITY ADVANTAGEBLU-RAY DENSITY ADVANTAGE

ON GUARD ON GUARD

DO MORE WITH…DO MORE WITH…

HISTORYHISTORY1st GENERATION :

Compact Disc (CD):-- 650/700MB It is with us for over 20 yrs. Wavelength of laser which reads data: 780nm Color of laser: Red

2nd GENERATION : Digital versatile disc (DVD):-- 4.7GB It offers high quality sound and video than CD. Wavelength of laser which reads data: 650nm Color of laser: Red

HISTORYHISTORY3RD Generation: Blu-ray disc (BD):-- 25/50 GB Next generation optional disc format. Developed by blu-ray association (which includes

Apple, Hitachi, HP, LG, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony).

Wavelength of laser that reads data: 405nmColor of laser: Blue-violet which was developed by

SHUJI NAKAMURA at NICHIA COPERATION.

The NameThe NameThe blu-ray name is the combination The blu-ray name is the combination

of “blue”, for color of the laser that is of “blue”, for color of the laser that is used and “ray” for the optical ray.used and “ray” for the optical ray.

The “e” in “blue” was purposefully left The “e” in “blue” was purposefully left off, according to the manufacturers, off, according to the manufacturers, because an everyday word cannot because an everyday word cannot be a trademark.be a trademark.

Format of BDFormat of BDIt comes in four different formats:It comes in four different formats:

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

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

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

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

TYPES OF BDTYPES OF BDSINGLE LAYER:SINGLE LAYER:

can hold data up to 25/27 GB that can hold data up to 25/27 GB that means 2hrs of HD video or about means 2hrs of HD video or about 13hrs of standard video.13hrs of standard video.

DOUBLE LAYER:DOUBLE LAYER:

can hold data up to 50 GB that can hold data up to 50 GB that means 4.5hrs of HD video or about means 4.5hrs of HD video or about 20hrs of standard video.20hrs of standard video.

THE TECHNOLOGYTHE TECHNOLOGYPits: spiral groves that runs from the Pits: spiral groves that runs from the

center of the disc to its edge.center of the disc to its edge.

Track pitch: it is the distance between Track pitch: it is the distance between the two tracks (of pits) on the surface.the two tracks (of pits) on the surface.

--------------------------------------------------------------------------------------------------------------------

Disc store digitally encoded data in PITS.Disc store digitally encoded data in PITS.

--------------------------------------------------------------------------------------------------------------------

THE TECHNOLOGYTHE TECHNOLOGYSo, in blu-ray disc:So, in blu-ray disc:

Pit size--Pit size-- 0.15 microns (more than 0.15 microns (more than twice as small as the pits on DVD).twice as small as the pits on DVD).

Track pitch– Track pitch– 0.32 microns0.32 microns

laser needed:-- laser needed:-- blue-violet laser blue-violet laser (450nm)(450nm)

Data transfer rate: 36MbpsData transfer rate: 36Mbps

Comparison in buildingComparison in buildingBD AND DVDBD AND DVD

BDBD

Data is placed on top of a Data is placed on top of a 1.1 mm thick 1.1 mm thick polycarbonate layer.polycarbonate layer.

Doesn’t suffer from Doesn’t suffer from BIREFRINGENCE.BIREFRINGENCE.

Doesn’t suffer fromDoesn’t suffer from Disc Disc Tilt.Tilt.

Hard coating is placed Hard coating is placed outside to protect from outside to protect from scratches or fingerprints.scratches or fingerprints.

DVDDVD

Data is sandwiched b/w Data is sandwiched b/w two polycarbonate layers, two polycarbonate layers, each 0.6 mm thick.each 0.6 mm thick.

Suffer from Suffer from BIREFRINGENCE.BIREFRINGENCE.

Suffer fromSuffer from Disc Tilt. Disc Tilt.

No such hard coating is No such hard coating is placed.placed.

CD vs. DVD vs. HD-DVD vs. CD vs. DVD vs. HD-DVD vs. Blu-ray DiscBlu-ray Disc

Features of BDFeatures of BDWith 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 any program while watching other on the Record any program while watching other on the disc.disc.Create playlists.Create playlists.Edit or reorder programs recorded on the disc.Edit or reorder programs recorded on the disc.Automatically search for an empty on the disc to Automatically search for an empty on the disc to avoid recording over the program.avoid recording over the program.Access to web to download subtitles and other Access to web to download subtitles and other extra features.extra features.And many more…..And many more…..

BLU-RAY ‘S DURABILITY BLU-RAY ‘S DURABILITY ADVANTAGEADVANTAGE

Various hard coating technologies make Blu Various hard coating technologies make Blu ray disc most durable and family-friendly.ray disc most durable and family-friendly.

Hard coating technology provides resistances Hard coating technology provides resistances to:to:– Finger printsFinger prints– MarksMarks– ScratchesScratches– DustDust

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

Blu-ray Density Blu-ray Density AdvantageAdvantage

Higher density Higher density enables better enables better data seek times.data seek times.

Shorter to travel Shorter to travel for same amount for same amount of data results in of data results in the faster data the faster data seek.seek.

Better for random Better for random access of data.access of data.

On GuardOn Guard

Blu-ray discs are better armed Blu-ray discs are better armed than current DVD’s. They come than current DVD’s. They come equipped with a secure equipped with a secure encryption system – a unique ID encryption system – a unique ID that protected against video that protected against video piracy and copyright piracy and copyright infringement.infringement.

Do More With…Do More With…More capacity , Density and More capacity , Density and Performance.Performance.

More Industry Support/Consumer More Industry Support/Consumer Reach.Reach.

More Durable.More Durable.

More interactive user experience.More interactive user experience.

More flexible content protection.More flexible content protection.

THANK THANK YOUYOU