Blue Ray Disk

Blu-ray Disc: 

Blu-ray Disc

BLU RAY: 

BLU RAY Prepared By:- 1.Chetan S. Shewale

Evolution: 

Evolution VHS: analog DVD: digital BD: high-definition Enables recording, rewriting, and playback of high-definition. Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

Foundation: 

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 The “e” is intentionally left out of the name due to trademark restrictions

Disc Characteristics: 

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

Disc Characteristics: 

Disc Characteristics The power conservation allows the development of multi-layer platforms and high-speed recording BD-ROM: read-only format. Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”

Disc Characteristics: 

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

Recorder Characteristics: 

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 Expected to be available in the U.S. by 2006

Compatibility: 

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 <http://www.jvc-victor.co.jp/english/press/2004/bd-dvd.html>

Protection System: 

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

Enhancements: 

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”

Enhancements: 

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

Future: 

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

CONCLUSION: 

CONCLUSION IT IS MORE COMFORTABLE TO USE. IT IS BEST DISC THAN DVD,CD,ETC... BEST TRANSFERER:- The transfer rate is 36 megabits per second IT HAS TWO LAYER(DUAL LAYER-50 GB).