Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Mode Change Protocols for Predictable Contract-Based Resource Management in Embedded Multimedia Systems.
Year:2009
Research Areas
  • Architecture of computers
Information
Abstract
Media processing in High-Quality Multimedia Embedded Systems (HQMES) has real-time constraints. Timely processing and rendering of video frames and audio samples is essential to meet user expectations. The nature of incoming media suffers unforeseen variations which have different resource requirements. Therefore, HQMES have to integrate policies for efficiently and smoothly adapting to these changes. Mode change protocols allow applications to switch their state (for instance, to transition from one quality level to another) by controlling the way in which the application tasks change from one state to another. This paper provides a solution for timely mode change protocols based on a contract model between applications and the execution platform. A new mode change algorithm, progressive mode change protocol, is introduced for applications with no tolerance to data loss during their transitions. The execution platform is based on a quality of service resource manager (QoSRM) that arbitrates the greedy execution of multimedia applications, and that is implemented on top of the services of a real-time operating system. A task model and a temporal characterization of multimedia application tasks is also presented as the basic platform for the QoSRM operation. Validation experiments show stable execution of applications with the proposed task characterization and progressive mode change
International
Si
Congress
6th IEEE International Conference on Embedded Software and Systems. (IEEE ICESS 09)
960
Place
HangZhou, Zhejiang, China
Reviewers
Si
ISBN/ISSN
978-0-7695-3678-1
Start Date
25/05/2009
End Date
27/05/2009
From page
221
To page
210
Proceedings of the 6th IEEE International Conference on Embedded Software and Systems
Participants
  • Autor: Alejandro Antonio Alonso Muñoz (UPM)
  • Autor: Juan Antonio de la Puente Alfaro (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Sistemas de tiempo real y arquitectura de servicios telemáticos
  • Departamento: Ingeniería de Sistemas Telemáticos
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