COLLEGE FOR PROFESSIONAL STUDIES TOPIC OF PRESENTATION DVD TECHNOLOGY

CONTENTS ۞ Introduction of DVD ۞ Construction of DVD ۞ Types of DVD ۞ Physical Formats of DVD ۞ CD to DVD Comparison ۞ Advantages of DVD ۞ Conclusion

Introduction of DVD ۩ Digital Versatile Disk ۩ Storage of a large amount of data ۩ Use digital technology ۩ Optical disc storage technology ۩ Use a shorter wavelength laser-Red laser beam( mm)

DVD Construction ‡ Thin, circular wafer of clear plastic and metal. ‡ 4.75 inches (12 centimeters) in diameter

DVD Construction Writing Mechanism

DVD Construction Reading Mechanism

Types of DVD Single Side - Single Layer (DVD-5) Single Side - Double Layer (DVD-9) Double Side - Single Layer ( DVD-10) Double Layer - Double Side (DVD-18)

Physical formats of DVD  DVD-ROM Is a high capacity data storage medium  DVD-Video Is a digital storage medium for a feature-length motion picture  DVD-Audio Is an audio-only storage format, similar to CD-Audio  DVD-R Is similar to a CD/R which offers a write-once,read many storage format  DVD-RAM Was the first re-writable (erasable) DVD.

Advantages of DVD 1)Digitally recorded so reliable. 2)Instant search to title, chapter, music track, and time code. 3)Durable (no wear from playing, only from physical damage). 4)Not susceptible to magnetic fields. Resistant to heat. 5)Writes in smaller pits

Conclusion Thus, it is one of the most important, reliable and economic medium for storage of data like videos, pictures, movies, documents etc. As the data is written in binary format it will be easier for computer to read, write and erase the data in the DVD.

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