Title :
GOP-Level Dynamic Thermal Management in MPEG-2 Decoding
Author :
Lee, Wonbok ; Patel, Kimish ; Pedram, Massoud
Author_Institution :
Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA
fDate :
6/1/2008 12:00:00 AM
Abstract :
In this paper, we present a dynamic thermal management (DTM) algorithm based on: 1) accurate estimation of the workload of frames in a group of pictures (GOP) in an MPEG-2 video stream and 2) 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 to 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.
Keywords :
decoding; microprocessor chips; thermal management (packaging); video coding; video streaming; GOP-level dynamic thermal management; MPEG-2 decoding; dynamic voltage and frequency scaling; group of pictures; slack borrowing; video stream; Decoding; Degradation; Dynamic voltage scaling; Frequency; Heuristic algorithms; Microprocessors; State estimation; Streaming media; Temperature; Thermal management; Dynamic thermal management (DTM); MPEG-2 decoding; dynamic voltage and frequency scaling (DVFS); group of pictures (GOP); quality degradation;
Journal_Title :
Very Large Scale Integration (VLSI) Systems, IEEE Transactions on
DOI :
10.1109/TVLSI.2008.2000251
