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

Volume

16

Issue

6

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

662

Lastpage

672

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;

fLanguage

English

Journal_Title

Very Large Scale Integration (VLSI) Systems, IEEE Transactions on

Publisher

ieee

ISSN

1063-8210

Type

jour

DOI

10.1109/TVLSI.2008.2000251

Filename

4515956