Blu ray disk seminar
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This document summarizes the evolution and technology of Blu-ray discs. It discusses how Blu-ray discs offer higher storage capacity than DVDs through the use of blue laser technology and allow for HD recording and playback. The document traces the history of Blu-ray and the Blu-ray Disc Association alliance. It also compares the disc characteristics, storage capacities, and features of CDs, DVDs, and Blu-ray discs.
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Blu ray disk seminar
- 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.
- 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
- 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.
- 21. THANKS