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Bluray disc-ppt-by-dhruv2-1222350645931113-9

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Text of Bluray disc-ppt-by-dhruv2-1222350645931113-9

  • 1. BY VINOD KUMAR.M

2. 3. HISTORY

  • 1 stGENERATION:
  • Compact disc (CD):---650/700 MB
  • Wavelength of laser which reads data: 780 nm
  • Color of laser:Red
  • 2 ndGENERATION:
  • Digital versatile disc (DVD): ---4.7 GB
  • It offers high quality sound and video than CD.
  • Wavelength of laser which reads data: 650 nm
  • Color of laser:Red

4. HISTORY

  • 3 rd GENERATION :
  • Blu-ray disc (BD): ---25/50 GB
  • -Next generation optical disc format.
  • -Wavelength of laser which reads data:405 nm
  • -Color of laser:Blue-violetwhich was developed by
  • SHUJINAKAMURA
  • atNICHIACORPORATION

5. THE NAME

  • The blu-ray name is a combination of blue, for the color of the laser that is used and ray for optical ray.
  • The e in blue was purposefully left off, according to the manufacturers, because an everyday word cannot be a trademark.

6. TYPESOFBD:

  • SINGLE LAYER:
  • Can hold data up to 25/27 GB that means 2 hrs of HD video or about 13 hrs of standard video.
  • DOUBLE LAYER:
  • Can hold data up to 50 GB that means 4.5 hrs of HD video or more than 20 hrs of standard video.

7. 8. SISE OF THE DISC 9. THE TECHNOLOGY

  • So, in blu-ray disc:
  • Pit size 0.15microns( more than twiceas small as the pits on DVD )
  • Track-pitch is: 0.32microns
  • Laser needed:blue-violet laser (405 nm)
  • Data transfer rate: 36Mbps

The Blue-lasers shorter wavelength makes it possible to store more information on a 12 cm CD/DVD size disc. The minimum spot size on which a laser can be focused is limited by diffraction ,and depends on the wavelength of the high and the numerical aperture of the lens used to focus it. 10. THE TECHNOLOGY

  • Pits: spiral grooves that run from the centre of the disc to its edges
  • Track pitch: it is the distance between the two tracks (of pits) on the surface.

11. 12. 13. BLU RAY SDURABILITY ADVANTAGE

  • Various hard coating technologies make Blu ray disc most durable and family -friendly
  • Hard-coating technology provides resistance to:
  • - Finger prints
  • - Marks
  • - Scratches
  • - Dust

14. FEATURES OF BD

  • With BD we can:
  • Record HDTV without any quality loss
  • Instantly skip to any spot on disc
  • Record one program while watching other on the disc
  • Create playlists
  • Edit or reorder programs recorded on disc
  • Automatically search for an empty space on the disc to avoid recording over a program
  • Access to web to download subtitles and other extra features
  • And many more

15. 16. 17. Queries?