Blu Ray Disc Seminar

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Blu-ray Disc (also known as BD or Blu-Ray) is an optical disc storage,designed to Upgrade the contemporaystandard DVD format. It is a High Definitjion Audio- Video Device.

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Blu Ray Disc Seminar

  1. 1. Seminar on Blu-ray Disc October 11, 2008 Er. Rajesh Kumar M.Tech (ECE) INDIA
  2. 2. Evolution <ul><li>VHS: analog DVD: digital BD: high-definition </li></ul><ul><li>Enables recording, rewriting, and playback of high-definition video </li></ul><ul><li>Capable of storing information that the DVD and CD are not capable of holding </li></ul>Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  3. 3. Foundation <ul><li>Blu-ray disc (BD) is appropriately named after the blue laser used to write the data </li></ul><ul><li>The first blue laser was developed in 1996 by Shuji Nakamura (Nichia Corporation) </li></ul><ul><li>In 2002, an alliance was formed, called the Blu-ray Disc Association, including the likes of Sony, Samsung, Sharp, Hewlett-Packard, and Royal Phillips </li></ul><ul><li>The “e” is intentionally left out of the name due to trademark restrictions </li></ul>
  4. 4. Disc Characteristics <ul><li>Single layer: 25 GB Dual layer: 50 GB </li></ul><ul><li>Diameter: 120 mm </li></ul><ul><li>Thickness: 1.2 mm </li></ul><ul><li>Center hole diameter: 15 mm </li></ul><ul><li>Uses GaN laser of wavelength 400 nm </li></ul><ul><li>The smaller laser, compared to the DVD and CD, keeps the process more efficient (~5 mW) </li></ul>Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  5. 5. Disc Characteristics(conti.) <ul><li>The power conservation allows the development of multi-layer platforms and high-speed recording. </li></ul><ul><li>BD-ROM: read-only format. </li></ul><ul><li>BD-R and BD-RE: recordable formats (RE: rewritable; R: recordable once) </li></ul>Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  6. 6. Disc Characteristics <ul><li>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. </li></ul><ul><li>Phase change implies that the disc section is either an amorphous or crystalline state. The reflectivity changes accordingly thus representing a binary bit. </li></ul>Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  7. 7. Comparison: CD, DVD & Blu-ray Disc <ul><ul><li>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. </li></ul></ul>Courtesy <http://www.jvc-victor.co.jp/english/press/2004/bd-dvd.html>
  8. 8. Recorder Characteristics <ul><li>Over two hours of HDTV can be placed on a single layer BD, which correlates to over 13 hours for standard TV. </li></ul><ul><li>The transfer rate is 36 megabits per second. </li></ul><ul><li>At 1x speed, it takes approximately 1.5 hours to record an entire single layer BD. </li></ul><ul><li>Recorder Cost: $1,500 - $2,500; BD Cost: $26. </li></ul><ul><li>BD’s are commercially available in the U.S. since 2006. </li></ul>
  9. 9. Capacity Comparison “ Courtesy: How Stuff Works”
  10. 10. Compatibility <ul><li>This issue has introduced a competitor, the HD-DVD, that based its technology around being compatible with the DVD. </li></ul><ul><li>Recently the BDA has developed recorders that are BD/DVD/CD compatible. </li></ul><ul><li>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. </li></ul>Courtesy <http://www.jvc-victor.co.jp/english/press/2004/bd-dvd.html>
  11. 11. Protection System <ul><li>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. </li></ul><ul><li>Uses the Data Encryption Standard (DES) that has a key length of 56 bits. </li></ul><ul><li>A Key Block and Disc ID are written into the ROM area to prevent illegal copying. </li></ul>
  12. 12. Enhancements <ul><li>Error rates increased in reading and writing after the original BD suffered scratches and fingerprints. </li></ul><ul><li>For protection, the prototype BD was enclosed in a case. </li></ul><ul><li>The case increased the size of the disc drive. </li></ul>Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  13. 13. Enhancements(conti.) <ul><li>A hard coat was derived of an ultraviolet-curable resin that has a scratch resistance similar to the DVD. </li></ul><ul><li>An artificial fingerprint reagent is placed on the disc surface to resist fingerprint oils. </li></ul>Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  14. 14. Features of BLU-RAY Disc ------------------------------------- <ul><li>MANUFACTURING </li></ul><ul><li>RECORDING </li></ul><ul><li>PLAY BACK </li></ul>
  15. 15. Manufacturing * BD Cover Manufacturing Process Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  16. 16. Recording & Playback Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  17. 17. Address Format *Using Groove Wobbles Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  18. 18. Write pulse waveform Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  19. 19. Write strategy Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  20. 20. CODING FOR BD OPTICAL RECORDING Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  21. 21. Modulation code and error correcting code FOR DIGITAL STORAGE SYSTEM Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  22. 22. Error distributions For 50GB Capacity Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  23. 23. Future <ul><li>Expect the BD to become more prevalent once the HDTV market establishes its presence. </li></ul><ul><li>Audio and video will reach higher qualities with larger storage space. </li></ul><ul><li>Look for BD with more than two layers as the technology is further refined. </li></ul>
  24. 24. <ul><li>Sony has made the Disc with size 200GB already. </li></ul><ul><li>Pioneer announced on August 5, 2008 , that they have got success </li></ul><ul><li>in making BD with </li></ul><ul><li>increased Disc Size </li></ul><ul><li>of 500GB. </li></ul>Future(conti.)
  25. 25. Commercial Market Blu-ray drives Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  26. 26. Blu-ray Media Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  27. 27. Blu-ray Recorders Courtesy Blu-ray Disc Founders “Blu-ray Disc Format White Paper”
  28. 28. <ul><li>http:// www.digitaljournal.com /article/254136 </li></ul><ul><li>http:// www.blu-ray.com /news/?id=1616, </li></ul><ul><li>http:// www.docstoc.com /docs/424938/White-paper-General-Blu-ray-Disc-Format </li></ul><ul><li>http:// allfreedownloadlinks.com /free-softwares/free-multimedia-software/blu-ray- to-dvd-pro-v120/ </li></ul><ul><li>http:// reviews.cnet.com /1770-9991_7-0.html?query= blu+ray+disc&searchtype=products&tag=ltcol;narrow </li></ul><ul><li>http:// en.wikipedia.org /wiki/Blu-ray_Disc# Technical_specifications </li></ul><ul><li>http:// www.thefreelibrary.com /_/search/Search.aspx? </li></ul><ul><li>SearchBy=0&Word=blu+ray+disc&By=0 </li></ul>Bibliography
  29. 29. END OF THE SLIDE SHOW ANY QUERY PLEASE ??????
  30. 30. THANKS

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