HOLOGRAPHIC VERSATILE DISC
A SEMINAR REPORT
Submitted by
NIKESH BHARTI
impartial fulfillment of requirement of the Degree
of
Bachelor of Technology (B.Tech)
IN
COMPUTER SCIENCE AND ENGINEERING
SCHOOL OF ENGINEERING
COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
KOCHI- 682022
AUGUST 2008Page 2

Certificate
DIVISION OF COMPUTER SCIENCE AND ENGINEERING
SCHOOL OF ENGINEERING
COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
KOCHI-682022
Certificate
Certified that this is a bonafide record of the seminar entitled
HOLOGRAPHIC VERSATILE ....etc

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Definition

Devices that use light to store and read data have been the backbone of data storage for nearly two decades. Compact discs revolutionized data storage in the early 1980s, allowing multi-megabytes of data to be stored on a disc that has a diameter of a mere 12 centimeters and a thickness of about 1.2 millimeters. In 1997, an improved version of the CD, called a digital versatile disc (DVD), was released, which enabled the storage of full-length movies on a single disc.

CDs and DVDs are the primary data storage methods for music ....etc

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Definition
Holographic Versatile Disc (HVD) is an optical disc technology still in the research stage, which would greatly increase storage over Blue-Ray and HD DVD optical disc systems. It employs a technique known as collinear holography, whereby two lasers, one red and one blue-green, are collimated in a single beam.Current optical storage saves one bit per pulse, and the HVD alliance hopes to improve this efficiency with capabilities of around 60,000 bits per pulse. The HVD has a transfer rate of 1 gigabit/sec. ....etc

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Mass memory systems serve computer needs in both archival and backup needs. There exist numerous applications in both the commercial and military sectors that require data storage with huge capacity, high data rates and fast access. To address such needs 3-D optical memories have been proposed. Since the data are stored in volume, they are capable of much higher storage densities than existing 2-D memory systems. In addition this memory system has the potential for parallel access. Instead of writing or reading a sequence of bits at each time, ....etc

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Holographic associative memory can be considered as a type of artifical neural network, which is having close association with the family of analog, correlation-based, stimulus-responsive memories. In Holographic associative memory, the information is mapped on to the phase orientation of complex numbers operating. The ability of holographs in carrying out effective associative memory tasks, generalization and pattern recognition with changeable attention has given holographic memory the cutting edge over others. Natural memory has the capacity ....etc

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It's an optical disc technology still in the childhood stages of research called as the collinear holography, would soon gain upper hand over the existing technologies like the blue-ray and HD DVD optical disc systems with respect to its storage capacity. Consisting of a blue-green laser and a red laser collimated in a single beam, the blue-green laser reads data encoded as laser interference fringes from a holographic layer near the top of the disc while the red laser is used as the reference beam and to read servo information from a regular C ....etc

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Devices that use light to store and read data have been the backbone of data storage for nearly two decades. Compact discs revolutionized data storage in the early 1980s, allowing multi-megabytes of data to be stored on a disc that has a diameter of a mere 12 centimeters and a thickness of about 1.2 millimeters. In 1997, an improved version of the CD, called a digital versatile disc (DVD), was released, which enabled the storage of full-length movies on a single disc.

CDs and DVDs are the primary data storage ....etc

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As processors and buses roughly double their data capacity every three years (Mooreâ„¢s Law), data storage has struggled to close the gap. CPUs can perform an instruction execution every nanosecond, which is six orders of magnitude faster than a single magnetic disk access. Much research has gone into finding hardware and software solutions to closing the time gap between CPUs and data storage. Some of these advances include cache, pipelining, optimizing compilers, and RAM. As the computer evolves, so do the applications that computers are ....etc

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Holographic associative memory can be considered as a type of artificial neural network, which is having close association with the family of analog, correlation-based, stimulus-responsive memories. In Holographic associative memory, the information is mapped on to the phase orientation of complex numbers operating. The ability of holographs in carrying out effective associative memory tasks, generalization and pattern recognition with changeable attention has given holographic memory the cutting edge over others. Natural memory has the capacit ....etc

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It is an optical disc technology in the infant state of research, that utilizes the revolutionary collinear holography technique that has one red laser and one blue-green laser collimated into a single beam. The data that is programmed as laser interference fringes from a holographic layer at the top of the disc is read by the blue-green laser where as the servo information from the common CD style aluminum layer near the bottom is read by the red laser, which is used as the reference beam. This disc capable of storing 3.9 terabytes of data als ....etc

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