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2008

GOP-Level Dynamic Thermal Management in MPEG-2 Decoding

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GOP-Level Dynamic Thermal Management in MPEG-2 Decoding
In this paper, we present a dynamic thermal management (DTM) algorithm based on (i) accurate estimation of the workload of frames in a group of pictures (GOP) in an MPEG-2 video stream and (ii) slack borrowing across the GOP frames in order to achieve a thermally safe state of operation in microprocessors during the video decoding process. The proposed DTM algorithm employs dynamic voltage and frequency scaling (DVFS) while considering the frame-rate-dependent GOP deadline, variance of the frame decoding times within the GOP, and a maximum chip temperature constraint. If it becomes necessary to sacrifice video quality or violate the GOP deadline due a low temperature bound, then the (intra-frame) spatial quality degradation and the (inter-frame) temporal quality degradation will be applied to the GOP. Experimental results demonstrate the competence and efficiency of the proposed online DTM algorithm.
Wonbok Lee, Kimish Patel, Massoud Pedram
Added 16 Dec 2010
Updated 16 Dec 2010
Type Journal
Year 2008
Where TVLSI
Authors Wonbok Lee, Kimish Patel, Massoud Pedram
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