NDLI: Quality-of-Service Optimization for Multiple Multimedia Tasks in Real-Time Embedded Systems

Content Provider	IEEE Xplore Digital Library
Author	Kai-Jung Shih Yi-Hsun Lin Pao-Ann Hsiung
Copyright Year	2009
Abstract	Nowadays, most embedded systems support different kinds of multimedia applications and real-time tasks. The computational requirements of multimedia applications are usually very demanding and embedded systems may not be powerful enough to support multiple multimedia applications. As a result, real-time tasks will miss their deadlines and thus get rejected. To solve this problem, we propose a Dynamic Workload Shaping (DWS) method by extending a Dynamic Buffering Technique (DBT) to multiple multimedia tasks and proposing two optimization methods. The original DBT scheduling method can only guarantee that the playout devices are always able to read out data items from the playout buffers, but does not guarantee any QoS. Two algorithms are proposed in this work to optimize and guarantee the quality of multimedia applications. We use several examples to illustrate how both algorithms can be applied to real systems. With MPEG-4 and H.264 applications, our experimental results show that the lower bound of 15 frames per second for the output device rates of the two multimedia applications can be guaranteed even if the processor frequency that can be allocated to them is very small. The processor frequency for running other real-time applications can be saved 10\% to 15\% if the multimedia applications run at their corresponding minimum processor frequencies that were computed by the guaranteeing QoS method.
Starting Page	474
Ending Page	479
File Size	507605
Page Count	6
File Format	PDF
ISBN	9781424454037
e-ISBN	9781424454044
DOI	10.1109/I-SPAN.2009.143
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-14
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Quality of service Multimedia systems Real time systems Embedded system Radio spectrum management Streaming media Application software Frequency Embedded computing Bandwidth workload shaping multimedia Quality-of-Service buffering
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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