2.  History
 Blu-Ray Disc
 Working
 The Technology
 Advantages
 Disadvantages
 On Guard
 To Do More With

3. First Generation
 When the CD was introduced in the early 80s, it meant an
enormous leap from traditional media.
 Not only did it offer a significant improvement in audio quality,
its primary application, but its 650 MB storage capacity also
meant a giant leap in data storage and retrieval.
 For the first time, there was a universal standard for
prerecorded, recordable and rewritable media, offering the
best quality and features consumers could wish for themselves,
at very low costs.

4. Second Generation
 Although the CD was a very useful medium for the
recording and distribution of audio and some
modest data .applications, demand for a new
medium offering higher storage capacities rose in
the 90s.
 These demands lead to the evolution of the DVD
specification and a five to ten fold increase in
capacity.
 This enabled high quality, standard definition video
distribution and recording. Furthermore, the
increased capacity accommodated more demanding
data applications.

5. HDTV (High Definition Video) :
 It is also possible to capture video using inexpensive
webcams. These normally connect to a computer via
USB.
 While they are much cheaper than DV cameras,
webcams offer lower quality and less flexibility for
editing purposes, as they do not capture video in DV
format.
 Digital video is available on many portable devices from
digital stills cameras to mobile phones.
 This is contributing to the emergence of digital video as
a standard technology used and shared by people on a
daily basis.

6.  MPEG :
MPEG, the Moving Picture Experts Group, overseen by the
International Standards Organization (ISO), develops
standards for digital video and was designed specifically
for Video .
 MPEG .1 audio player .3 (MP3) compression evolved from
early MPEG work. MPEG1 is an established, medium quality
format supported by all players and platforms. Although
not the best quality it will work well on older specification
machines.
 MPEG .2 is an excellent format for distributing video, as
it offers high quality and smaller file sizes .Despite this,
MPEG2 is becoming more common as a capture format.

7.  Blu-ray -also known as Blu-ray Disc (BD) is the
name of a next-generation optical disc format.
 The format was developed to enable recording,
rewriting and playback of high-definition video
(HD), as well as storing large amounts of data.
 The format offers more than five times the
storage capacity of traditional DVDs and can hold
up to 25GB on a single-layer disc and 50GB on a
dual-layer disc.

8.  According to the Blu-ray Disc specification, 1x
speed is defined as 36Mbps.
 However, as BD-ROM movies will require a
54Mbps data transfer rate the minimum speed
we're expecting to see is 2x (72Mbps).
 Blu-ray also has the potential for much higher
speeds, as a result of the larger numerical
aperture (NA) adopted by Blu-ray Disc.
 The large NA value effectively means that Blu-ray
will require less recording power and lower disc
rotation speed than DVD and HD-DVD to achieve
the same data transfer rate.

9. Unlike a DVD which uses a red laser the blu ray uses a
blue laser. This blue laser has a shorter wave length.
The beam is more precise and can read the grooves on
the blu ray disc which are made twice as small as the
ones on a regular DVD.
This is why the blu ray disc can hold so much data and
contains so many new features.
For these reasons, the blu-ray disc will probably
become the medium of choice for the foreseeable
future , until something better comes along.

10. Comparison in Beam
size

11. THE TECHNOLOGY
Pits: spiral groves that runs from the center
of the disc to its edge.
Track pitch: it is the distance between the
two tracks (of pits) on the surface.
----------------------------------------------------------
Disc store digitally encoded data in PITS.
----------------------------------------------------------

12. THE TECHNOLOGY
So, in blu-ray disc:
Pit size-- 0.15 microns (more than
twice as small as the pits on DVD).
Track pitch– 0.32 microns
laser needed:-- blue-violet laser (450nm)
Data transfer rate: 36Mbps

14. Blu-ray Density
Advantage
Higher density
enables better data
seek times.
Shorter to travel for
same amount of
data results in the
faster data seek.
Better for random
access of data.

15. Technology Capacity
GB
Speed Access
Time
Archive
Life
Power
Consumption
Special
Requirements
Cost
GB
Blu-ray 50 Good V Good 50 Low No High
Plasmon
UDO
30 Average Good 50 Low No Highes
t
DVD 4.7/9.4 Poor Average 50 Low No Low
TAPE >800 V Good V Poor 30 Medium No Low
RAID >1TB Excellen
t
Excellen
t
2 High Needs
backing
up
Low

16. Format of BD
It comes in four different formats:
1. BD-ROM (read only): for reading recorded
content.
2. BD-R (recordable): for PC data storage.
3. BD-RW (rewritable): for PC data storage.
4. BD-RE (rewritable): for HDTV (high definition
television) recording.

17. TYPES OF BD
SINGLE LAYER:
can hold data up to 25/27 GB that
means 2hrs of HD video or about
13hrs of standard video.
DOUBLE LAYER:
can hold data up to 50 GB that
means 4.5hrs of HD video or about
20hrs of standard video.

18. Comparison in building
BD AND DVD
BD
Data is placed on top of a
1.1 mm thick
polycarbonate layer.
Doesn’t suffer from
BIREFRINGENCE.
Doesn’t suffer from Disc
Tilt.
Hard coating is placed
outside to protect from
scratches or fingerprints.
DVD
Data is sandwiched b/w
two polycarbonate layers,
each 0.6 mm thick.
Suffer from
BIREFRINGENCE.
Suffer from Disc Tilt.
No such hard coating is
placed.

20.  Huge storage capacity series
Although Blu-ray can't quite fit an entire of HD-
quality material on one disc, it could potentially fit
an entire series of standard DVD quality stuff on
one. That's pretty good, considering the storage
savings alone.
 Quality support :Sony and Philips might be the
strongest backers of Blu-ray, but other major
corporations have announced future plans to
support the technology. Some of these include
Apple, Dell and Panasonic.

21.  Backwards compatibility :
The Blu-ray Disc Association is encouraging
manufacturers to make the players fully
backwards compatible.
That will allow users to both read and write
on CDs, DVDs, and, obviously, Blu-ray
discs.

22.  That cost
 Movie support, thus far
 The competition
 The cost of films.

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

24. Do More With…
More capacity , Density and
Performance.
More Industry Support/Consumer
Reach.
More Durable.
More interactive user experience.
More flexible content protection.