Energy adaptation for multimedia information kiosks
Energy adaptation for multimedia information kiosks
复制标题
多媒体信息亭的能源适应
DOI：
10.1145/1176887.1176920
复制
发表时间：
2006
期刊：
影响因子：
6.2
通讯作者：
J. Lawall
中科院分区：
文献类型：
--
作者：
R. Urunuela;Gilles Muller;J. Lawall
视频信息亭越来越多地包含功能强大的类似PC的嵌入式处理器，使它们能够以高质量水平显示视频。然而，这样的视频显示，需要显着的能量消耗。本文提出了一种方法，以减少能源消耗，通过调整CPU的时钟频率。与以前的方法相比，我们利用视频亭的特定行为。因为一个kiosk一遍又一遍地播放同一组电影，所以我们根据在早期迭代中观察到的帧的计算要求为给定帧选择CPU频率。我们已经在传统的视频播放器MPlayer中实现了我们的方法。在像那些可以在信息亭中找到的PC上，我们观察到与在一组高分辨率divx电影上以最大CPU频率运行相比，电池寿命增加了2倍。
Video kiosks increasingly contain powerful PC-like embedded processors, allowing them to display video at a high level of quality. Such video display, however, entails significant energy consumption.This paper presents an approach to reducing energy consumption by adapting the CPU clock frequency. In contrast to previous approaches, we exploit the specific behavior of a video kiosk. Because a kiosk plays the same set of movies over and over, we choose a CPU frequency for a given frame based on the computational requirements of the frame that were observed on earlier iterations. We have implemented our approach in the legacy video player MPlayer. On a PC like those that can be found in kiosks, we observe increases in battery lifetime of up to 2 times as compared to running at the maximum CPU frequency on a set of high resolution divx movies.