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Proceedings Paper

Reduced-energy decoding of MPEG streams
Author(s): Melena Mesarina; Yoshio Turner
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Paper Abstract

Long battery life and high performance multimedia decoding are competing design goals for portable appliances. For a target level of QoS, the achievable battery life can be increased by dynamically adjusting the supply voltage throughout execution. In this paper, an efficient offline scheduling algorithm is proposed for preprocessing stored MPEG audio and video streams. It computes the order and voltage settings at which the appliance's CPU decodes the frames, reducing energy consumption without violating timing or buffering constraints. Our experimental results elucidate the tradeoff of QoS and energy consumption. They demonstrate that the scheduler reduces CPU energy consumption by 19%, without any sacrifice of quality, and by nearly 50%, with only slightly reduced quality. The results also explore how the QoS/energy tradeoff is affected by buffering and processor speed.

Paper Details

Date Published: 10 December 2001
PDF: 12 pages
Proc. SPIE 4673, Multimedia Computing and Networking 2002, (10 December 2001); doi: 10.1117/12.449990
Show Author Affiliations
Melena Mesarina, Univ. of California/Los Angeles (United States)
Yoshio Turner, Hewlett-Packard Labs. (United States)

Published in SPIE Proceedings Vol. 4673:
Multimedia Computing and Networking 2002
Martin G. Kienzle; Prashant J. Shenoy, Editor(s)

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