MPEG-4
From Simple English Wikipedia, the free encyclopedia
MPEG-4 is a video and audio standard. Movies in MPEG-4 need less space on a computer and at the same time they have DVD quality. MPEG means Moving Picture Experts Group. Several hundreds of researchers and engineers all over the world worked to develop MPEG-4. The work on this standard ended in 1998 and in a few months MPEG-4 achieved a status of international standard.
Movies that use MPEG-4 standard have high quality and low data rates. Older versions of the standard were: MPEG-1 and MPEG-2. In comparison with these older versions, MPEG-4 has additional features like: extended error correction, variable resolutions, efficient picture compression and many more.
MPEG-4 takes into consideration special requirements from computer, television areas and telecommunication. It is able to encode, besides rectangular pixels, individual objects situated within a certain scene. An example could be a car driving in front of a background. The background almost doesn't change. Because MPEG-4 encodes many rectangular images, the car can be treated as an independent object, being apart from a fixed background.
[edit] See also
[edit] External links
- MPEG-4 - Additional information on the format for more advanced users