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On scheduling atomic and composite continuous media objects
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DOI：10.1109/69.991729.png)
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In multiuser multimedia Information systems (e.g., movie-on-demand, digital-editing), scheduling the retrievals of continuous media objects becomes a challenging task. This is because of both intra and inter lobject time dependencies. Intraobject time dependency refers to the real-time display requirement of a continuous media object. Interobject time dependency is the temporal relationships defined among multiple continuous media objects. In order to compose tailored multimedia presentations, a user might define complex time dependencies among multiple continuous media objects with various lengths and display bandwidths, Scheduling the retrieval tasks corresponding to the components of such a presentation in order to respect both inter and intra task time dependencies is the focus of this study. To tackle this task scheduling problem (CRS), we start with a simpler scheduling problem (ARS) where there is no Inter task time dependency (e.g., movie-on-demand). Next, we investigate an augmented version of ARS (termed ARS(+)) where requests reserve displays In advance (e.g., reservation-based movie-on-demand). Finally, we extend our techniques proposed for ARS and ARS(+) to address the CRS problem. We also provide formal definition of these scheduling problems and proof of their NP-hardness.
Keyword:
composite objects
continuous media retrieval
multimedia
real-time scheduling
storage servers
temporal relationships
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10.4
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被引数:
3.2W
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