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Published byArchibald Robinson Modified over 9 years ago
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DVDs what they are and how they work
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DVDs DVD originally stood for: D V D igital isc ideoVersatile? http://en.wikipedia.org/wiki/DVD
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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
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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
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How does a DVD work? Laser Optical Pickup Data goes to computer Pictures from http://www.howstuffworks.com
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What do they look like? Here is a DVD reader This one is made by LG Picture from http://www.ieci.com.au
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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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