Holographic Versatile Disc aka HVD for the storage of 8K Super Hi-vision Data

1. VISAKH SIVAN
ELECTRONICS & COMMUNICATION DEPT
COCHIN UNIVERCITY COLLEGE OF ENGINEERING
HOLOGRAPHIC VERSATILE DISC
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2. 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.
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3. 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.
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4. 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.
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5. WHAT IS HVD ?
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6. 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
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7. TECHNOLOGY USED IN HVD
• Collinear holography – The laser beams are collimated.
• Blue-green laser reads the data encoded in the form of laser
interference.
• Red laser serves the purpose of reference beam and to read
the servo info.
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8. 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 8

9. 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 9

10. WRITING DATA
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11. 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.
• This interference pattern is stored in the photopolymer area
of the disc as a hologram.
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12. READING DATA
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13. 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.
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14. LIMITATIONS
• The medium may cause shrinkage and expansion
due to photopolymerization during the recording
process temperature changes .
• This lead to the distortion of holograms.
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15. WAVEFRONT COMPENSATION
• Hologram distortion was optically compensated for by
controlling the wavefront of the laser beam.
• A phase-SLM is inserted into the optical path of the
reference beam.
• Generates an appropriate wavefront of the beam that
matches hologram distortion.
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16. WAVEFRONT COMPENSATION
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17. RESULT OF WAVEFRONT COMPENSATION
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18. 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.
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19. 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.
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20. 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.
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21. 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.
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22. 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.
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23. 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”http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5738819&isnu
mber=5738811
• [6]. http://electronics.howstuffworks.com/hvd.htm
• [7]. http://electronics.howstuffworks.com/hvd1.htm
• [8]. http://electronics.howstuffworks.com/hvd2.htm
• [9]. http://electronics.howstuffworks.com/hvd3.htm
• [10]. http://en.wikipedia.org/wiki/Holographic_Versatile_Disc
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24. THANK YOU !!
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