BLU RAY DISC

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BLU RAY DISC

  1. 1.
  2. 2. BLU- RAY DISC<br />PREPARED BY<br />-DEEPALI RATHOD<br />
  3. 3.
  4. 4. HISTORY<br />Blu-ray, also known as Blu-ray Disc (BD) is the name of a next-generation optical disc format. <br />Developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data. <br />The name Blu-ray is derived from the Underlying technology, which utilizes a blue-violet laser to read and write data<br />
  5. 5. HISTORY<br />The name is a combination of "Blue" (blue-violet laser) and "Ray" (optical ray)<br />According to the Blu-ray Disc Association IN the spelling of "Blu-ray“,the character "e" was intentionally Left out so the term could be registered as a trademark. <br />
  6. 6. FORMATS OF BD<br />
  7. 7. TYPES OF BD<br />
  8. 8.
  9. 9. BLUE RAY’S DURATBILITY ADVANTAGE<br /><ul><li>Various hard coating technologies make Blu ray disc most durable and “family -friendly”
  10. 10. Hard-coating technology provides resistance to:</li></ul> - Finger prints<br /> - Marks<br /> - Scratches<br /> - Dust<br /><ul><li>Much more ROBUST than today’s polycarbonate-based CD/DVD’s (and HD DVD’s)</li></li></ul><li>STRUCTURE OF BLU-RAY DISC<br />PITS : Discs store digitally encoded Video and <br /> audio information in pits – spiral grooves that run from the center of the disc to <br /> its edges. <br />LASER: A laser reads the other side of these pits <br />TRACK PITCH : iT IS THE DISTANCE BETWEEN TWO TRACKS(OF <br /> PITS) ON THE SURFACE.<br />
  11. 11. STRUCTURE OF BLU-RAY DISC<br />SO IN BLU-RAY DISC<br />PIT SIZE -0.15 MICRONS <br /> (MORE THAN TWISE <br /> AS SMALL AS THE PITS <br /> ON DVD.<br />TRACK-PITCH IS 0.32 MICRONS<br />Laser needed : blue-violet laser (405 nm)<br />Data transfer rate: 36Mbps<br />
  12. 12. CD VS. DVD VS. BD<br />BD<br />(3RD GENERATION)<br />DVD<br />(2ND GENERATION)<br />CD<br />(1ST GENERATION)<br />
  13. 13. CD VS. DVD VS. BD<br /> BD Disc will increase DVD capacity by 5 to 10 times.<br /> usage of a blue instead of a red laser improve lens specifications, allowing for a much smaller focus laser beam which enables the recording of much smaller and higher density pits on the disc<br />
  14. 14. CD VS. DVD VS. BD<br />
  15. 15. COMPARISION IN BUILDING DVD VS. BD<br />BD<br />DVD<br /><ul><li>Data is placed on top of a 1.1 mm thick polycarbonate layer
  16. 16. Doesn’t suffer from BIREFRINGENCE
  17. 17. Doesn’t suffer from DISC TILT
  18. 18. Hard coating is placed outside to protect from scratches or fingerprints
  19. 19. Data is sandwiched b/w two polycarbonate layers, each 0.6 mm thick
  20. 20. Suffer from BIREFRINGENCE
  21. 21. Suffer from DISC TILT
  22. 22. No hard coating is placed</li></li></ul><li>Because Blu-ray uses a blue laser(405 nanometers) instead of a red laser(650 nanometers) this allows the data tracks on the disc to be very compact.<br />
  23. 23. CONCLUSION<br /><ul><li>Record HDTV without any quality loss
  24. 24. Instantly skip to any spot on disc
  25. 25. Record one program while watching other on the disc
  26. 26. Create playlists
  27. 27. Edit or reorder programs recorded on disc
  28. 28. Automatically search for an empty space on the disc to avoid recording over a program
  29. 29. Access tHE web to download subtitles and other extra features</li></li></ul><li>BIBLOGRAPHY<br />WWW.GOOGLE.COM<br />WWW.WIKIPEDIA.COM<br />

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