Blu Ray Disc Seminar

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Seminar on Blu-ray Disc October 11, 2008 Er. Rajesh Kumar M.Tech (ECE) INDIA 1

Evolution 

VHS: analog DVD: digital BD: high-definition



Enables recording, rewriting, and playback of highdefinition video



Capable of storing information that the DVD and CD are not capable of holding Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

2

Foundation 





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 3

Disc Characteristics 











Single layer: 25 GB Dual layer: 50 GB Diameter: 120 mm Thickness: 1.2 mm Center hole diameter: 15 mm Uses GaN laser of wavelength 400 nm The smaller laser, compared to the DVD and CD,

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper” 4

Disc Characteristics(conti.) 

The power conservation allows the development of multi-layer platforms and high-speed recording.



BD-ROM: readonly format.



BD-R and BD-RE: recordable formats (RE:

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

5

Disc Characteristics

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”



Numerical Aperature 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 Bluray 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. Courtesy

7

Recorder Characteristics 

Over two hours of HDTV can be placed on a single layer BD, which correlates to over 13 hours for standard TV.



The transfer rate is 36 megabits per second.



At 1x speed, it takes approximately 1.5 hours to record an entire single layer BD.



Recorder Cost: $1,500 - $2,500; BD Cost: $26.



BD’s are commercially available in the U.S. since 8 2006.

Capacity Comparison

“Courtesy: How Stuff Works”

9

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.

Courtesy

10

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 11

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.

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper” 12

Enhancements(conti.) 



A hard coat was derived of an ultravioletcurable resin that has a scratch resistance similar to the DVD. An artificial fingerprint reagent is placed on the

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper” 13

Features of BLU-RAY Disc ------------------------------------

MANUFACTURING 

RECORDING



PLAY BACK 14

Manufacturing

* BD Cover Manufacturing Process

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

15

Recording & Playback

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

16

Address Format *Using Groove Wobbles

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

17

Write pulse waveform

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

18

Write strategy

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

19

CODING FOR BD OPTICAL RECORDING

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

20

Modulation code and error correcting code FOR DIGITAL STORAGE SYSTEM

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

21

Error distributions For 50GB Capacity

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

22

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. 23

Future(conti.) 



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. 24

Commercial Market Blu-ray drives

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

25

Blu-ray Media

Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

26

Blu-ray Recorders

Courtesy Blu-ray Disc Founders “Blu-ray Disc

27

Bibliography    



 

http://www.digitaljournal.com/article/254136 http://www.blu-ray.com/news/?id=1616, http://www.docstoc.com/docs/424938/Whitepaper-General-Blu-ray-Disc-Format http://allfreedownloadlinks.com/freesoftwares/free-multimedia-software/blu-ray- todvd-pro-v120/ http://reviews.cnet.com/1770-9991_70.html?query= blu+ray+disc&searchtype=products&tag=ltcol;n arrow http://en.wikipedia.org/wiki/Blu-ray_Disc# Technical_specifications http://www.thefreelibrary.com/_/search/Search.as px? 28 SearchBy=0&Word=blu+ray+disc&By=0

END OF THE SLIDE SHOW

ANY QUERY PLEASE ??????

29

THANKS

30

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