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Blu Ray Disc Ppt By Dhruv[2]



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Blu Ray Disc Ppt By Dhruv[2]

  2. 2. HISTORY <ul><li>1 st GENERATION: </li></ul><ul><li>Compact disc (CD): --- 650/700 MB </li></ul><ul><li>It is with us for over 20 years. </li></ul><ul><li>Wavelength of laser which reads data: 780 nm </li></ul><ul><li>Color of laser: Red </li></ul><ul><li>2 nd GENERATION: </li></ul><ul><li>Digital versatile disc (DVD): --- 4.7 GB </li></ul><ul><li>It offers high quality sound and video than CD. </li></ul><ul><li>Wavelength of laser which reads data: 650 nm </li></ul><ul><li>Color of laser: Red </li></ul>
  3. 3. HISTORY <ul><li>3 rd GENERATION : </li></ul><ul><li>Blu-ray disc (BD): --- 25/50 GB </li></ul><ul><li>-Next generation optical disc format. </li></ul><ul><li>-Developed by blu-ray disc association (which includes Apple, Hitachi, HP, LG, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony) </li></ul><ul><li>-Wavelength of laser which reads data: 405 nm </li></ul><ul><li>-Color of laser: Blue-violet which was developed by </li></ul><ul><li>SHUJI NAKAMURA </li></ul><ul><li>at NICHIA CORPORATION </li></ul>
  4. 4. FORMAT OF BD <ul><li>It comes in four different formats : </li></ul><ul><li>BD-ROM (read only) : for reading recorded content. </li></ul><ul><li>BD-R (recordable) : for PC data storage. </li></ul><ul><li>BD-RW (rewritable) : for PC data storage. </li></ul><ul><li>BD-RE (rewritable) : for HDTV (high definition television) recording. </li></ul>
  5. 5. TYPES OF BD: <ul><li>SINGLE LAYER : </li></ul><ul><li>Can hold data up to 25/27 GB that means 2 hrs of HD video or about 13 hrs of standard video. </li></ul><ul><li>DOUBLE LAYER : </li></ul><ul><li>Can hold data up to 50 GB that means 4.5 hrs of HD video or more than 20 hrs of standard video. </li></ul>
  6. 6. THE TECHNOLOGY <ul><li>Pits : spiral grooves that run from the centre of the disc to its edges </li></ul><ul><li>Bumps : other sides of these edges. </li></ul><ul><li>Track pitch : it is the distance between the two tracks (of pits) on the surface. </li></ul><ul><li>-------------------------------- </li></ul><ul><li>Disc store digitally encoded data in PITS. </li></ul><ul><li>-------------------------------- </li></ul>
  7. 7. THE TECHNOLOGY <ul><li>So, in blu-ray disc: </li></ul><ul><li>Pit size – 0.15 microns ( more than twice as small as the pits on DVD ) </li></ul><ul><li>Track-pitch is : 0.32 microns </li></ul><ul><li>Laser needed : blue-violet laser (405 nm) </li></ul><ul><li>Data transfer rate : 36 Mbps </li></ul>
  8. 11. COMPARISON IN BUILDING BD AND DVD <ul><li>BD </li></ul><ul><li>Data is placed on top of a 1.1 mm thick polycarbonate layer </li></ul><ul><li>Doesn’t suffer from BIREFRINGENCE </li></ul><ul><li>Doesn’t suffer from DISC TILT </li></ul><ul><li>Hard coating is placed outside to protect from scratches or fingerprints </li></ul><ul><li>DVD </li></ul><ul><li>Data is sandwiched b/w two polycarbonate layers, each 0.6 mm thick </li></ul><ul><li>Suffer from BIREFRINGENCE </li></ul><ul><li>Suffer from DISC TILT </li></ul><ul><li>No such hard coating is placed </li></ul>
  9. 12. BLU RAY ‘S DURABILITY ADVANTAGE <ul><li>Various hard coating technologies make Bly ray disc most durable and family -friendly” </li></ul><ul><li>Hard-coating technology provides resistance to: </li></ul><ul><li>- Finger prints </li></ul><ul><li>- Marks </li></ul><ul><li>- Scratches </li></ul><ul><li>- Dust </li></ul><ul><li>Much more ROBUST than today’s polycarbonate-based CD/DVD’s (and HD DVD’s) </li></ul>
  10. 13. FEATURES OF BD <ul><li>With BD we can: </li></ul><ul><li>Record HDTV without any quality loss </li></ul><ul><li>Instantly skip to any spot on disc </li></ul><ul><li>Record one program while watching other on the disc </li></ul><ul><li>Create playlists </li></ul><ul><li>Edit or reorder programs recorded on disc </li></ul><ul><li>Automatically search for an empty space on the disc to avoid recording over a program </li></ul><ul><li>Access to web to download subtitles and other extra features </li></ul><ul><li>And many more… </li></ul>
  11. 14. BLY-RAY’S DENSITY ADVANTAGE <ul><li>Higher density enables better data seek times </li></ul><ul><li>Shorter to travel for same amount of data results in faster data seek </li></ul><ul><li>Better for random access of data </li></ul>
  12. 15. THE NAME <ul><li>The blu-ray name is a combination of “blue”, for the color of the laser that is used and “ray” for optical ray. </li></ul><ul><li>The “e” in “blue” was purposefully left off, according to the manufacturers, because an everyday word cannot be a trademark. </li></ul>
  13. 16. On GAURD <ul><li>Blu-ray discs are better armed than current DVD’s. They come equipped with a secure encryption system– a unique ID that protects against video piracy and copyright infringement. </li></ul>
  14. 20. DO MORE WITH BLU… <ul><li>More capacity, Density and Performance </li></ul><ul><li>More Industry Support/Consumer Reach (BDA has 140+ members) </li></ul><ul><li>More Durable </li></ul><ul><li>More Interactive User Experience </li></ul><ul><li>More Flexible Content Protection: AAC, BD+ Renewability Technology and ROM Mark </li></ul>
  15. 21. Thank You