Definition:
MPEG-1 is a video codec used for Video CDs, and also sometimes for online video. The quality is roughly comparable to that of VHS. Almost every computer in the world can play this codec, and very few DVD players do not support it.
MPEG-1
By Gretchen Siegchrist, About.com Guide
Understanding Compression
What Is A Codec?What Is Video Compression?What Is A Multimedia Container Format?
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