Scheduling techniques to integrate MPEG-based multimedia applications in hard real-time systems

In this paper, we propose scheduling techniques to provide efficient run-time support to MPEG-based multimedia applications in the real-time system, where multimedia tasks and hard real-time tasks can coexist simultaneously. The paper describes a server-based mechanism for assigning the CPU resource to two types of tasks. Especially for MPEG video applications, we show how to dynamically control the fraction of the CPU bandwidth allocated to each multimedia task without jeopardizing the schedulability of hard real-time tasks present in the system. Scheduling techniques of this mechanism are capable of minimizing the mean tardiness of multimedia tasks while satisfying the timing constraints of hard real-time tasks.