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Power saving in Kand-held multimedia systems using MPEG-21 Digital Item Adaptation  

Shim Hojun (School of Computer Science and Engineering, Seoul National University)
Cho Youngjin (School of Computer Science and Engineering, Seoul National University)
Kim Jaemin (School of Computer Science and Engineering, Seoul National University)
Chang Naehyuck (School of Computer Science and Engineering, Seoul National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.43, no.2, 2006 , pp. 60-75 More about this Journal
Abstract
The MPEG-21 Multimedia Framework initiative aims to support a wide range of networks and devices in the delivery and consumption of multimedia resources. One of the primary goals of MPEG-21 is universal multimedia access (UMA) through Digital Item Adaptation (DIA), which supports multimedia streaming to heterogeneous devices ensurung the same readability and seamlessness. We pioneer power saving of luminal devices with MPEG-21 DIA, so that the MPEG-21 DIA can also be used to support power saving, even though the framework is not primarily designed for power reduction and only limited power awareness is defined by DIA. We introduce several power-saving techniques conforming to MPEG-21 DIA specifications and show the dependency relation among introduced techniques. We achieve energy savings of up to $66\%$ in hand-held multimedia devices with minor QoS (quality of service) degradation.
Keywords
MPEG-21; Low-power; Embedded Systems;
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