DVDs what they are and how they work. DVDs DVD originally stood for: D V D igital isc ideoVersatile?

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Presentation transcript:

DVDs what they are and how they work

DVDs DVD originally stood for: D V D igital isc ideoVersatile?

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

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

How does a DVD work? Laser Optical Pickup Data goes to computer Pictures from

What do they look like? Here is a DVD reader This one is made by LG Picture from

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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