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DVDs

DVDs. what they are and how they work. DVDs. DVD originally stood for:. D. igital. V. ideo. Versatile?. D. isc. http://en.wikipedia.org/wiki/DVD. What is a DVD?. A DVD is a new data storage standard, just like a VHS video tape is a storage standard

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DVDs

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  1. DVDs what they are and how they work

  2. DVDs • DVD originally stood for: D igital V ideo Versatile? D isc http://en.wikipedia.org/wiki/DVD

  3. What is a DVD? • A DVD is a new data storage standard, just like a VHS video tape is a storage standard • A single layer DVD stores about seven times more information than a CD. • This is enough data to hold up to 133 minutes of high resolution video

  4. How does a DVD work? • Data is recorded onto the DVD surface as a long spiral. • 0s and 1s are stored on the surface using a laser which makes ‘bumps’ on the surface Pictures from http://www.howstuffworks.com

  5. How does a DVD work? Laser Optical Pickup Data goes to computer Pictures from http://www.howstuffworks.com

  6. What do they look like? • Here is a DVD reader • This one is made by LG Picture from http://www.ieci.com.au

  7. Bonus Page • The latest DVDs can store data on two layers on the DVD • This means that the DVD can hold twice as much information

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