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MPEG-4 Book, The by Touradj Ebrahimi, Fernando Pereira

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13.4. Summary

MPEG-4 profiles and levels are meant for interoperability and conformance checking. MPEG-4 profiles start from MPEG-2 Video principles, consistently applied to all parts of the MPEG-4 standard. The fact that an MPEG-4 scene is potentially composed of multiple objects implies that profiles and levels must give bounds for the total of objects in the scene rather than for individual ones. While implementations of MPEG-4 reach a more mature stage, so does the understanding of industry's needs for interoperability points. It is not unlikely that more profiles need to be added in the future, and it is probable that some profiles will never be used. This means that the set of profiles is less elegant than it could have been, but this does ...

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