Reduced energy decoding of MPEG streams
| Autor: | Malena Mesarina, Yoshio Turner |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Decodes
biology Computer Networks and Communications Computer science business.industry Quality of service Clock rate Real-time computing Energy consumption biology.organism_classification Dynamic voltage scaling Scheduling (computing) Hardware and Architecture Embedded system Media Technology business Software Decoding methods Information Systems Voltage |
| Zdroj: | Multimedia Systems. 9:202-213 |
| ISSN: | 1432-1882 0942-4962 |
| DOI: | 10.1007/s00530-003-0090-7 |
| Popis: | 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 trade-off between 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 evaluate how the QoS/energy trade-off is affected by buffering and processor speed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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