Hd dvd

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Hd dvd

  1. 1. Shashwat Shriparv dwivedishashwat@gmail.com InfinitySoft
  2. 2. High Definifon DVD(HDDVD) It is the next generation DVD developed by TOSHIBA & NEC.  The disc has a capacity of 15GB in single layer,& 30GB capacity in dual layer. The technology used in HDDVD is almost similar to the existing CD,DVD technology.
  3. 3. • CD The CD ROM was introduced in 1982,The storage capacity of a CD is almost 650MB.CD’s are of different type ROM,R,RW. The disc is of 1.2mm thickness & 120mm diameter .it consists of polycarbonate substrates, a reflective layer ,a data storage layer. The data is stored as 1’s& 0’s,In conventional CDs, these 1s and 0s are represented by millions of pits s and land.  The discs are read using red lasers( 780nm wavelenth)  Data is encoded in the CD's in acontinuous spiraltrack, from the inside to the outside, about 1.6 to 2.2microns wide (a micron is 1/1000 of a
  4. 4. technology : read The pits and smooth areas (the smooth areas are called lands) are read by a laser when the disc is played.  Pits and lands reflect the light from the laser differently, and that difference is encoded as binary data: the light hitting a land reflects back directly to a photodiode, whichgenerates an electrical pulse, while the light hitting a pit is refracted (deflected from a straight path, or scattered),and, consequently, reduced below the level needed to activate the photodiode.
  5. 5. write a layer of organic polymer dye between the polycarbonate and metal layers serves as the recording medium. Thecomposition of the dye is permanently transformed by exposure to a specific frequency of light. While in the rotation by making the laser ON or OFF the the data is writing.
  6. 6. DVD DVD is a relatively new optical disc technology that uses denser recording techniques The original DVD format was launched in Japan in 1996. A DVD is very similar to a CD, but it has a much larger data capacity. A standard DVD holds about seven times more data than a CD does(4.7GB). The original purpose of DVD was to hold video data in particular - DVD once was said to stand for Digital Video Disk. However, as the number of DVD applications grew, the variety of data stored on DVD
  7. 7. Basic technology The wave length of the laser beam used to read the DVD disc is shorter than that used for standard CDs ie,650nm wavelenth.  There are more tracks per disc on DVDs, because they are placed closer together than on CDs. The track pitch has been reduced to 0.74 microns. Data pits are considerably smaller, which allows a greater number per track than on CDs.
  8. 8. specterum
  9. 9. HD DVD(High Definition DVD) The HD-DVD format, developed and proposed by Toshiba & NEC was introduced to the DVD Forum in November of 2003 and approved as the next- generation DVD format. It was developed to store highdefintion videos to get its full effect for HDTV. This is the only high definition format which is approved by the DVD forum
  10. 10. comparison
  11. 11. In HDDVD we are using Blue Violet laser (405nm) thus reducing the track pitch to 0.4 microns, Which increases the data capacity. The size of the pits is also reduced. It holds a data rate of maximum 36.55 Mbps.
  12. 12. Blue Violet Laser Shuji Nakamura, a Japanese researcher working in a small chemical company, Nichia Chemical Industries, built the first blue laser diode. This uses the GaN(gallium nitride) , in the earlier time blue lasers were large and expensive gas laser instruments and needed high currents and strong cooling.
  13. 13. Basic structure
  14. 14. The disc of diameter 12cm & thickness 1.2mm The disc contains polycarbonate subtrate layer in both sides . There’s one reflective layer made of alumnium. & a protective layer of lacquer The recording layer is of organic dye, is highly sensitive to blue laser light, has the uncompromised readout stability essential for practical use.
  15. 15. Types of HDDVD HDDVD-ROM HDDVD-R HDDVD-RW
  16. 16.  Single Layer HDDVD(15GB)  Dual Layer HDDVD(30GB)  Triple Layer HDDVD(45GB)
  17. 17. Dual layer HDDVD DVD media has two dye layers for data recording. Each dye layer is separated by a spacer and a metal reflector.  The first reflector (positioned after the first dye layer) is semi-transparent; when the laser is focused a certain way, it will pass through this reflector and continue through to the second dye layer and can read the data in the second dye layer. The second reflector is completely opaque and will
  18. 18. opportunity  High Definition Media.  Mass storage disc.
  19. 19. Appetite For HD Content Increasing  HDTV Gap between “US HDTV households” (US HHs) and current cable/satellite offerings is great market opportunity 6.1 10.0 15.7 23.3 32.5 41.9 50.4 57.3 0 10 20 30 40 2003 2004 2005 2006 2007 2008 2009 2010 USHHs(MMs) HD Dig Cable HD Satellite Source: Forrester Research – HDTV & the Coming Bandwidth Crunch, 2/17/2005 US HHs
  20. 20. HDDVD in high definition media HDDVD helps to view the high definition movies in its full effect. It supports all the high definition formats such as MPEG-2,VC-1,MPEG-4,AVC.MPEG-2 needs 19.3Mbps. It can give up to data rate 36.55Mbps. It supports video formats up to 1080i,1080p.  &HDTV video resolution 1920-1080.
  21. 21. High definition images offer a considerably richer colour palette with greater subtlety of colour transition and enhanced contrast. The result is greater precision, incredible detail and breathtaking realism.
  22. 22. advantages Cheaper to produce in the short term when compare to blueray. The only high definition format approved by the DVD forum. The name itself, HD-DVD, is more consumer- friendly HD-DVDs carry the same basic structure as current DVDs, so converting existing DVD manufacturing lines into HD-DVD lines is supposedly simple. Backed by Microsoft.
  23. 23. disadvantages  HD-DVD simply can't boast the same storage capacity as Blu-ray.  HDDVD did not have the Hard coating .
  24. 24. SD-H802A SD-H903A
  25. 25. SD-L912A SD-L902A
  26. 26. HD-A2
  27. 27. Strong Industry Support
  28. 28. Strong Studio Support
  29. 29. Shashwat Shriparv dwivedishashwat@gmail.com InfinitySoft
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