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HVD is an advanced optical disk that’s presently in the development stage.Its storage capacity is 1 TB and data transfer rate is 1 Gbp/s.

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abdulla rashri slideshare

  2. 2. Outline Introduction What is HVD? Basics of Holographic memory Technology used in HVD Structure of HVD Writing data Reading data Advantages, disadvantages and applications of HVD Facts Future Aspects Conclusion Reference
  3. 3. Introduction HVD is an advanced optical disk that‟s presently in the development stage. Storage capacity :- 1 terabyte (TB). Data transfer rate :- 1 Gigabit per second. The technology permits over 10 kilobits of data to be written and read in parallel with a single flash.
  4. 4. Introduction An HVD would be a successor to today‟s Blu-ray and HD-DVD technologies. Advancements in the technology were made, in the early 21st century. Developed by the “Holography Storage Development Forum”. HVD can store up to 60 times the data of a regular DVD and it can read and write data 10 times faster as well.
  5. 5. What is HVD ? Definition:- Holographic versatile disc is a holographic storage format that looks like a DVD but is capable of storing far more data. Prototype HVD devices have been created with a capacity of 3.9 terabytes (TB) and a transfer rate of 1 Gbps. 1 HVD = 5,500 CD-ROMs = 830 DVDs = 160 Blu- ray discs Uses laser beams to store data in 3D.
  6. 6. What is HVD ?
  7. 7. Basics of Holographic Memory Holography is a method of recording patterns of light to produce a 3D object. The recorded patterns of light are called a hologram. Creation of a hologram begins with a focused beam of light, a laser. Laser splits up into 2 :-  Reference beam  Information beam
  8. 8. Technology used in HVD Collinear holography – The laser beams are collimated. Blue-green laser reads the data encoded in the form of laserinterference. Red laser serves the purpose of reference beam and to read the servo info.
  9. 9. Structure of HVD The Holographic Versatile Disc structure consists of the following components:  Green writing/reading laser  Red positioning/addressing laser  Hologram (data)  Polycarbon layer  Photopolymeric layer (data-containing layer)  Distance layers  Dichroic layer (reflecting green light)  Aluminum reflective layer (reflecting red light)  Transparent base
  10. 10. Structure of HVD
  11. 11. Writing data A simplified HVD system consists of the following main components:  Blue or green laser (532-nm wavelength in the test system)  Beam splitter/merger  Mirrors  Spatial light modulator (SLM)  CMOS sensor  Photopolymer recording medium
  12. 12. Writing data
  13. 13. Writing data Information is encoded into binary and is stored in the SLM. These data are turned into ones and zeroes represented as opaque or translucent areas on a „page‟. When the information beam passes through the SLM, portions of the light are blocked by the opaque areas of the page, and portions pass through the translucent areas. When the reference beam and the information beam rejoin on the same axis, they create a pattern of light interference - the holography data.
  14. 14. Writing data Page Data Hologram made from the Page Data
  15. 15. Reading data
  16. 16. Reading data To read, we‟ve to retrieve the light pattern stored in the hologram. Laser is projected onto the hologram – a light beam that is identical to the reference beam . The hologram diffracts this beam according to the specific pattern of light interference its storing. The resulting light recreates the image of the page data that established the light-interference pattern – Reconstruction beam. The reconstruction beam - bounces back off the disc, it travels to the CMOS sensor. The CMOS sensor then reproduces the page data.
  17. 17. Advantages, disadvantages of HVD Advantages :-  More storage.  Reads and writes quickly.  Price, expected to be slashed down. Disadvantages :-  Initial price of the player and disc are high.  Price and storage not confirmed, still in R&D.
  18. 18. Applications of HVD Applications:-  Used for storing large amounts of data most likely for large companies.  Could be the most efficient way to backup information in the near future.
  19. 19. Facts It has been estimated that the books in the U.S. Library of Congress, the largest library in the world , could be stored on six HVDs. The pictures of every landmass on Earth - like the ones shown in Google Earth - can be stored on two HVDs. With MPEG4 ASP encoding, a HVD can hold anywhere between 4,600-11,900 hours of video, which is enough for non-stop playing for a year.
  20. 20. Future aspects Have tremendous implications in the commercial, industrial and d-Cinema realms. Will find wide use for backing up and archiving the media libraries, including the one at the Hollywood studios.
  21. 21. Conclusion Materialized with the evolution of the collinear holography technology. Stores far more data than, what a DVD can. Prototype HVD has a capacity of 3.9 TB and a transfer rate of 1 Gbps. Hence, 1 HVD = 830 DVDs = 160 Blu-Ray discs.
  22. 22. Reference [1]. Hideyoshi Horimai and Y.Aoki, “Holographic versatile disc(HVD) System” [2]. Optical data storage Topical Meeting 2006, 2006page(s):6-8. [3.] Hideyoshi Horimai and Xiaodi Tan,“Holographic Information Storage System: [4]. Today and Future,” Magnetics,IEEETransactions on Volume 43/Issue2,part 2 feb2007, page(s):943-947. [5]. G. Deepika, “Holographic versatile disc” =5738811 [6]. [7]. [8]. [9]. [10].
  23. 23. THANK YOU !!