Definition:MPEG-21 enables the use of multimedia resources across a wide range of networks and devices, and provides multiple adaptation operations such as transcoding, video summarization, replacement, and synthesis.
Content adaptation aims to make content universally accessible (Universal Multimedia Access) depending on terminal capabilities, network, usage and natural environment characteristics. Different networks and terminals imply different quality of service, bit rate, computing and presentation capabilities. MPEG-7, MPEG-21 and a number of adaptation operations aid the development of mechanisms for providing universal multimedia access. While MPEG-7 concentrates on the description of multimedia content and enables quick and efficient searching, identification, processing and filtering of multimedia material, MPEG-21 enables the use of multimedia resources across a wide range of networks and devices [1]. According to their functionality and use for Digital Item Adaptation, the...
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References
I. Burnett, R. Van de Walle, and K. Hill, J. Bormans, and F. Pereira, “MPEG-21: Goals and Achievements,” IEEE Multimedia, Vol. 10, No. 4, October 2003, pp. 60–70.
ISO/IEC, “MPEG-21 Digital Item Adaptation,” N5845, 2003.
S. F. Chang and A. Vetro, “Video Adaptation: Concepts, Technologies, and Open Issues,” Proceedings of the IEEE, Vol. 93, No. 1, January 2005, pp. 148–158.
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(2006). Multimedia Content Adaptation in MPEG-21. In: Furht, B. (eds) Encyclopedia of Multimedia. Springer, Boston, MA. https://doi.org/10.1007/0-387-30038-4_145
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DOI: https://doi.org/10.1007/0-387-30038-4_145
Publisher Name: Springer, Boston, MA
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