| 基于实时多媒体流的预取算法研究 |
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| 引用本文： | 阮俊波,金惠华.基于实时多媒体流的预取算法研究[J].计算机工程与应用,2004,40(2):93-94,98. |
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| 作者姓名： | 阮俊波 金惠华 |
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| 作者单位： | 北京航空航天大学计算机学院,北京,100083 |
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| 摘 要： | 实时多媒体应用存在严格的时间限制。存储访问时延是影响系统性能的一个最关键问题,针对实时多媒体数据而言,基于传统数据的LRU及其改进算法上的的预取和置换策略已经不能满足实际QoS要求。该文针对实时多媒体流,建立终端环境下的实时媒体对象的任务路径树模型,并给出该模型下的媒体流的预取和置换算法MO-VFT。实验模拟结果表明,所提出的模型合理,算法负载小,性能提高达20～35%。
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| 关 键 词： | 实时 预取 置换 QoS 媒体流 |
| 文章编号： | 1002-8331-(2004)02-0093-02 |
Research of Prefetch Algorithm Based on Real-time Multimedia Streams |
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| Ruan Junbo Jin Huihua.Research of Prefetch Algorithm Based on Real-time Multimedia Streams[J].Computer Engineering and Applications,2004,40(2):93-94,98. |
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| Authors: | Ruan Junbo Jin Huihua |
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| Abstract: | Real-time multimedia applications must meet with time constraint.Latency of memory access is the most crit-ical performance issue.For real-time multimedia data,prefetching and replacement policy based on LRU and its improve-ment for traditional datas do not guarantee the QoS.Based on real-time media stream under end system,it proposes task path tree model of real-time media objects,prefetching and replacement algorithm is given.Experiments show that the given model is practical,and work-loads of the algorithm is low,the technique could improve20～35%efficiency. |
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| Keywords: | Real-time Prefetch Replacement QoS Multimedia stream |
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