FORMAT-INDEPENDENT SCALABLE BIT-STREAM ADAPTATION USING MPEG-21 DIA (WA-P5)

Author(s) : Debargha Mukherjee (Hewlett Packard Laboratories, USA) Geraldine Kuo (Hewlett Packard Laboratories, USA) Shih-ta Hsiang (Hewlett Packard Laboratories, USA) Sam Liu (Hewlett Packard Laboratories, USA) Amir Said (Hewlett Packard Laboratories, USA)

Abstract : Part 7 of MPEG-21 entitled Digital Item Adaptation (DIA), is an emerging metadata standard defining protocols and descriptions enabling content adaptation to customize for a wide variety of networks and terminals, with emphasis on format-independent mechanisms. The descriptions in DIA provide a standardized interface not only to a variety of format-specific adaptation engines, but also to a fully format-independent adaptation engine for scalable bit-streams. A format-independent engine contains a decision-making module operating in a semantics independent manner, cascaded with a bit-stream adaptation module that uses an XML transformation to model the bit-stream adaptation process using parameters derived from decisions made. In this paper, we describe the DIA descriptions that enable such fully format-independent bit-stream adaptation. With universal adaptation engines, the same adaptation infrastructure can be used for different types of scalable media, standardized or proprietary, thereby substantially reducing the adoption costs.

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