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480p

Definition:

The "480" part of 480p describes the number of vertical lines that make up a television or video signal. Most television or video signals are rated at 480, 720 or 1080. The more vertical lines that make up the picture, the crisper or higher definition the picture. The "p" following 480 indicates that the video display is constructed using a progressive scan method.

Many standard definition DVDs are published in a 480p format.

Here's a word you may not know...

megapixel

A megapixel describes the quality of a digital picture or camera. 1 megapixel is equal to 1 million pixels. A higher megapixel number means a digital camera can store more information or detail with each picture taken. Higher megapixels also allow you to more efficiently crop a digital picture without sacrificing the quality of the picture.