caa a22 4500 445322217 CHVBK 20180317142707.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s00530-011-0230-4 doi (NATIONALLICENCE)springer-10.1007/s00530-011-0230-4 Context-aware adaptation of multimedia documents for consistent presentations [Elektronische Daten] [Abdelkrim Abdelli, Nadjib Badache] We propose in this paper a context-aware adaptation technique for SMIL encoded multimedia documents. Our approach is mainly dedicated to run in compile-time but we discuss also how it can be used in runtime. Our algorithm aims at improving the execution of a multimedia presentation. This is achieved by scheduling object pre-fetchings in the presentation while monitoring bandwidth and memory space availabilities. For this effect, a request pattern computed from the temporal graph of the SMIL specification is exploited in order to apply an optimal policy to select which objects should be pre-fetched, real time delivered or discarded, even. The algorithm can be used as a tool to evaluate and to monitor the QoS of a presentation. At compile time, it makes it possible to assess whether the QoS of a presentation can be guaranteed after enforcing specific context-oriented adaptations. At authoring stage, this algorithm can be used, for instance, to produce different alternative sub-codes, such that each one is adapted to run in a specific context. In runtime, the algorithm can provide a mechanism to monitor the elastic time computation in case of a mismatch occurrence. In order to advocate our proposal, some experimentation results performed on a simulation platform are reported. Springer-Verlag, 2011 SMIL nationallicence Prefetching nationallicence QoS nationallicence Consistency nationallicence Multimedia presentation nationallicence Memory nationallicence Bandwidth nationallicence Compile time adaptation nationallicence Scheduling nationallicence Abdelli Abdelkrim LSI Laboratory, Computer Science Department, USTHB University, Algiers, Algeria aut Badache Nadjib LSI Laboratory, Computer Science Department, USTHB University, Algiers, Algeria aut Multimedia Systems Springer-Verlag 17/6(2011-11-01), 465-486 0942-4962 17:6<465 2011 17 530 https://doi.org/10.1007/s00530-011-0230-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00530-011-0230-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abdelli Abdelkrim LSI Laboratory, Computer Science Department, USTHB University, Algiers, Algeria aut NATIONALLICENCE 700 1- Badache Nadjib LSI Laboratory, Computer Science Department, USTHB University, Algiers, Algeria aut NATIONALLICENCE 773 0- Multimedia Systems Springer-Verlag 17/6(2011-11-01), 465-486 0942-4962 17:6<465 2011 17 530 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer