Improvement in Optical Disc Technology.

1. What is next ?
0.7 GB 9 GB 30~50 GB

2. HOLOGRAPHIC VERSATILE DISC
Presented By:
Muragesh S Kabbinakantimath
USN:4GM09EC408

3. 1. INTRODUCTION
2. UNDERLYING TECHNOLOGY-
HOLOGRAPHY
3. RECORDING DATA
4. READING DATA
5. HVD- STRUCTURE
6. COMPARISON
7. TYPES : WORM & RW
8. REFERENCES

4.  Next-Next Generation Technology
 Scientist J. V. Heerden came up with this idea in 1960
 Media type : Ultra-high density optical disc
 Encoding : MPEG-2, MPEG-4 AVC (H.264), and VC-1
 Capacity theoretically up to 3.9 TB
 Developed by HSD Forum
 Usage :Data storage,
:High-definition video & the possibility of ultra high
definition video

5.  Data transfer rate : 1gbps.
 The technology permits over 10 kilobits of data to be written and
read in parallel with a single flash.
 Most optical storage devices, such as a standard CD saves one bit
per pulse. HVDs manage to store 60,000 bits per pulse in the same
place.
 1 HVD = 5800 CDs = 830 DVD =160 BLU-RAY

6.  Black and white photograph
 Contains Intensity distribution
 Color photograph
 Intensity and wavelength
 Hologram
 Intensity, phase, and sometimes wavelength

7.  INVENTED BY
SCIENTIST
GABOR IN 1947.
 CONTAINS
INFORMATION
ABOUT AMPLITUDE
AND PHASE OF
OBJECT WAVE.

9.  Translates electronic data (0's and 1's) into
optical pattern of light and dark pixels.
 Data is arranged in an array similar to a
checkerboard of usually 1M (million) bits.
 By varying the angle of the reference
beam,wavelength or media position, many
holograms can be stored in the same
volume of storage material.

11.  HVD uses a technology called 'collinear holography,'
 Two laser rays, one blue-green and one red are used.
 The role of the blue-green laser is to read the data encoded in the
form of laser interference fringes from the holographic layer.
 The red laser serves the purpose of a reference beam and also to
read the servo info from the aluminum layer.

13. 1. Green writing/reading laser (532 nm)
2. Red positioning/addressing laser (650
nm)
3. Hologram (data)
4. Polycarbon layer
5. Photopolymeric layer (data-containing
layer)
6. Distance layers
7. Dichroic layer (reflecting green light)
8. Aluminium reflective layer (reflecting
red light)
9. Transparent base
P. PIT

15. Parameters DVD BLU-RAY HVD
capacity 4.7 GB 25 GB 3.9 TB
Laser wave length 650 nm
(red)
405 nm
(blue)
532 nm
(green)
Disc diameter 120 mm 120 mm 120 mm
Hard coating no yes yes
Data transfer rate
(raw data)
11.08
mbps
36 mbps 1 gbps
Data transfer rate
(audio/video)
10.08
mbps
54 mbps 1 gbps

16.  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.

17.  A blue-green argon laser
 Beam splitters to spilt the laser beams
 Mirrors to direct the laser beams
 LCD panels (spatial light modulator)
 Lenses to focus the laser beams
 Lithium-niobate crystals or photopolymers and
 Charge-coupled device (CCD) cameras.

18.  1) Large Data Density/ Capacity
 2) Better Reliability
 3) High Transfer Rates & Short Access Times
 4) Fault And Damage Tolerance
Which Are Not Available Simultaneously With Any Other Storage
Technology.

19. Video-On-
Demand
Portable
Computing
Multimedia
Consumer
Audio/Video

21.  Psaltis, D. Mok, F. Holographic memories. Scientific American
 Encyclopedia of Optical Engineering
 www.ibm.com - IBM Research Press Resources Holographic
Storage
 www.howstuffworks.com
 www.hvd-forum.org

23.  HVD will soon replace previous DVDs.
 It is currently supported by more than 170 of the world's leading
consumer electronics, personal computer, recording media, video
game and music companies.
 The format also has broad support from the major movie studios
as a successor to today's DVD format.