MPEG-21 Standardization Process: Organization and Rate Distortion Modeling for Network Adaptation

摘要

An overview of MPEG-21 standard together with the application of the rate distortion theory in modeling for network adaptation is provided. The first section introduces parts of this standard as well as motivation and objective for all of them. Next section deals with Digital Item Adaptation (D1A) as a part of the MPEG-21 Multimedia Framework. DIA specifies metadata for assisting the adaptation of digital items according to the constraints on the storage transmission and consumption. In that way various types of quality of service management are enabled. Finally, the third section describes DIA use in multimedia applications and reports on some of the activities in MPEG-21 on extending DIA for the use in the rate distortion modeling for network adaptation.