1. SEMINAR
ON
BLURAY TECHNOLOGY
P.SAI PRANAY
RAJ
B.Tech
Iv Yr (ECE)
GNIT

2. EVOLUTION:
• VHS: analog
DVD: digital
BD: high-definition.
• Enables recording,
rewriting, and playback of
high-definition video.
• Capable of storing
information that the DVD
and CD are not capable of
holding

3. HISTORY
• BLU-RAY disc (BD) is appropriately named after
the blue laser used to write the data.
• The first blue laser was developed in 1996 by Shuji
Nakamura (Nichia Corporation).
• In 2002, an alliance was formed, called the BLU-
RAY Disc Association, including the likes of
Sony, Samsung, Sharp, Hewlett-Packard, and Royal
Phillips
• The “e” is intentionally left out of the name due to
trademark restrictions.

4. Disc Characteristics
The power conservation
allows the development of
multi-layer platforms and
high-speed recording.
BD-ROM: read-only format.
BD-R and BD-RE:
recordable formats (RE:
rewritable; R: recordable
once).

5. Disc Characteristics
Numerical Aperture measures the ability of a lens to gather
and focus light. As the numerical aperture increases, the
focusing power increases and the beam size decreases.
Phase change implies that the disc section is either an
amorphous or crystalline state. The reflectivity changes
accordingly thus representing a binary bit.

6. Comparison: CD, DVD & Blu-ray Disc
Due to the fact that the data layer on a Blu-ray Disc
is placed much “closer” to the laser lens than in DVD
, there is less distortion resulting in significantly
improved tolerances. Hence, more precision and ultra
high storage densities are made possible.

7. Capacity Comparison

8. Compatibility
This issue has introduced a competitor, the HD-DVD, that
based its technology around being compatible with the DVD.
Recently the BDA has developed recorders that are
BD/DVD/CD compatible.
JVC has advanced the BD by developing a BD/DVD combo
disc that stores both DVD and BD data. It is composed of two
DVD layers and a third BD layer storing 33.5 GB total.

9. Protection System
HDTV contains a copyright bit that is
detected by the BD recorder. If the broadcast
has no copyright bit, then the BD recorder is
allowed to store the information.
Uses the Data Encryption Standard (DES)
that has a key length of 56 bits.
A Key Block and Disc ID are written into the
ROM area to prevent illegal copying.

10. Enhancements
Error rates increased in reading and writing after the
original BD suffered scratches and fingerprints.
For protection, the prototype BD was enclosed in a
case.
The case increased the size of the disc drive.

11. Enhancements(conti.)
A hard coat was derived
of an ultraviolet-curable
resin that has a scratch
resistance similar to the
DVD.
An artificial fingerprint
reagent is placed on the
disc surface to resist
fingerprint oils.

12. Features of BLU-RAY Disc
MANUFACTURING
RECORDING
PLAY BACK

13. Manufacturing
* BD Cover Manufacturing Process

14. Recording & Playback

15. Address Format
*Using Groove Wobbles

16. Modulation code and error correcting code

17. Future
Expect the BD to become more prevalent once the HDTV market establishes
its presence.
Audio and video will reach higher qualities with larger storage space.
Look for BD with more than two layers as the technology is further refined.
Sony has made the Disc with size 200GB already.
Pioneer announced on August 5, 2008 , that they have got success in making
BD with increased Disc Size of 500GB.

18. Commercial Market
Blu-ray drives

19. Bibliography
•http://www.digitaljournal.com/article/254136
•http://www.blu-ray.com/news/?id=1616,
•http://www.docstoc.com/docs/424938/White-paper-General-Blu-
ray-Disc-Format
•http://allfreedownloadlinks.com/free-softwares/free-multimedia-
software/blu-ray- to-dvd-pro-v120/
•http://reviews.cnet.com/1770-9991_7-0.html?query=
blu+ray+disc&searchtype=products&tag=ltcol;narrow
•http://en.wikipedia.org/wiki/Blu-ray_Disc#
Technical_specifications
•http://www.thefreelibrary.com/_/search/Search.aspx?
• SearchBy=0&Word=blu+ray+disc&By=0

20. ANY QUERY PLEASE
??????

21. THANKS