Adaptation of scalable multimedia documents
Proceedings of the eighth ACM symposium on Document engineering
CAIN-21: An Extensible and Metadata-Driven Multimedia Adaptation Engine in the MPEG-21 Framework
SAMT '09 Proceedings of the 4th International Conference on Semantic and Digital Media Technologies: Semantic Multimedia
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This paper presents a method to complement existing video, audio and image adaptation techniques in order to improve the perceived quality of interactive richmedia applications in streaming scenarios. This approach consists in dynamically adapting multimedia services at the presentation level according to medialevel adaptation decisions. First, an enhanced decision-taking engine decides on the best presentation form based on author constraints. Then, presentation updates dynamically modify the user display according to fluctuating environment constraints. A fine-grain control of the synchronization of these updates with adapted media streams is used to enable seamless switching of media bitstreams with different coding (transcoding) or switching to media streams with different modality (transmoding). This paper finally describes an application test-bed using MPEG-4 and MPEG-21 to implement the proposed adaptation approach and illustrates the user experience improvement.