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multimedia task
相关语句
  多媒体任务
     A Study on the Technique Dealing with Multimedia Task of Wearable Computer
     可穿戴计算机多媒体任务处理技术研究
短句来源
     Real-time continuous multimedia task model and scheduling algorithm
     实时连续多媒体任务模型及调度算法
短句来源
     A QoS-Based Multimedia Task Model
     一种基于服务质量的多媒体任务模型
短句来源
     The paper puts forth a multimedia task model based on QoS,and gives an algorithm of computing system QoS indexes for the model.
     本文提出了一种基于服务质量的多媒体任务模型,并给出了在该模型下计算系统QoS指标的算法。
短句来源
  “multimedia task”译为未确定词的双语例句
     For guaranteeing Quality of Service of real-time multimedia task in the integrative business network,a soft real-time Linux system was designed.
     为了在综合业务网络中保障实时多媒体业务的服务质量(QoS),设计了软实时Linux系统。
短句来源
     The result indicates that the performance of processing Real-time network data packet and scalable in QR-Linux is better than that in Linux. This certificates the performance of Real-time in QR-Linux, and can support the QoS of the Real-time multimedia task.
     测试结果表明QR-Linux系统的实时网络数据包的处理性能明显优于Linux系统,并且保持了可伸缩性(scalable),体现了系统的实时性,能够对实时多媒体业务的服务质量提供支持。
短句来源
     The research progress on the interleaver,decoding algorithm and the appliance of Turbo code is summarized. It is pointed that Turbo code can accurately decode and recover the signal under weak signal or strong noise. The Turbo code has become the criterion one of the channel codes in 3G with advantages such as large capacity,high data ratio and multimedia task.
     综述了Turbo码系统中的交织器、译码算法以及Turbo码应用方面的研究进展,指出Turbo码在信号很弱或在干扰信号较强时,能够准确地还原信号,已成为以大容量、高数据率和承载多媒体业务为目的的第3代移动通信的信道编码方案之一.
短句来源
     A simple test has been done to certify that the system is stable,and it can guarantee the QoS of real-time multimedia task,especially the delay jitter.
     通过简单的测试证明本系统运行稳定,能够保障实时多媒体业务的服务质量,尤其对解决延迟抖动问题有明显的效果。
短句来源
  相似匹配句对
     A QoS-Based Multimedia Task Model
     一种基于服务质量的多媒体任务模型
短句来源
     ON MULTIMEDIA TECHNOLOGY
     多媒体技术
短句来源
     ON MULTIMEDIA DESIGNATION
     谈谈多媒体制作
短句来源
     Video summarization is another important task of multimedia information summarization.
     视频摘要技术是多媒体信息自动摘要技术的另一个重要方面。
短句来源
     During task.
     执行任务时教师要督促任务的进程并对学生表现作以评价。
短句来源
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  multimedia task
A higher slope on drop rate is seen in the case of integrated multimedia task sets.
      


Continuous media service is a new kind of real time applications. It requires that hard and soft real time tasks should be supported in an integrated operating system framework. But the scheduling policies in traditional OS(e.g., UNIX or Windows NT)can't support this application to the best. This paper proposes a new QoS method, based on which a QoS based heuristic task scheduling algorithm supporting continuous media streams is described. The algorithm takes into account the success ratio and...

Continuous media service is a new kind of real time applications. It requires that hard and soft real time tasks should be supported in an integrated operating system framework. But the scheduling policies in traditional OS(e.g., UNIX or Windows NT)can't support this application to the best. This paper proposes a new QoS method, based on which a QoS based heuristic task scheduling algorithm supporting continuous media streams is described. The algorithm takes into account the success ratio and consecutive fail count of multimedia tasks in order to guarantee the quality of all media streams. Finally, simulation and comparison are performed to validate the effectiveness of this algorithm.

连续媒体服务如视频、音频等是一类新的实时应用,要求在一统一的操作系统框架内支持强、弱实时应用(任务),而传统的操作系统(如UNIX或者WindowsNT)中的调度策略不能很好的支持该类应用.文中提出了一种新的QoS描述方法,并在此基础上提出支持连续媒体流的、基于QoS的启发式任务调度算法,该算法综合考虑了多媒体任务的成功率和连续失败数,在资源有限的前提下,尽量保证所有媒体流的服务质量.文中通过模拟、比较对该算法进行了评价.

The algorithm of resource management and allocation is very important to guarantee the application's quality of service (QoS) in distributed multimedia systems. In resource management, the QoS negotiation and admission depend on scheduling algorithm. Thus it is the kernel of resource management. Early deadline first (EDF) and rate monotonic (RM) in real time systems have been used in distributed multimedia systems today. But they can result to schedule with much jitter. Recently, a new pinwheel...

The algorithm of resource management and allocation is very important to guarantee the application's quality of service (QoS) in distributed multimedia systems. In resource management, the QoS negotiation and admission depend on scheduling algorithm. Thus it is the kernel of resource management. Early deadline first (EDF) and rate monotonic (RM) in real time systems have been used in distributed multimedia systems today. But they can result to schedule with much jitter. Recently, a new pinwheel scheduling DSr that is little jitter scheduling is presented. But it is only suitable for uniprocessor systems. Although DSr is a distributed scheduling algorithm, its assumption is not very suitable for distributed systems so that it can not be adopted. This paper presents a jitterless integrated task scheduling algorithm DMSr that removes candidates step by step based on the pinwheel model of distance constraints. It discusses the time complexity and proves the schedulability condition. It can guarantee the QoS of multimedia tasks. Specially it can schedule with jitterless. Two examples illustrate scheduling algorithm procession and tight schedulability condition in this paper. Finally, the authors do experiments with client/server model in 100M switching Ethernet and make the compression about results in delay, jitter and CPU utilization among EDF, RM and DMSr.

在分布式多媒体系统中,资源的管理和分配算法是保证应用的服务质量(QoS)的关键问题.而资源管理中,QoS协商和确认都和多媒体任务调度算法有关,任务调度算法是资源管理的重要内容.现有的调度算法EDF,RM,DSr适用在分布式多媒体系统中,有局限性.本文基于风车调度模型,提出了一种无抖动调度的逐步消除候选项的并行算法DMSr,能达到分布式系统中多媒体任务周期调度的无抖动特点,并讨论了算法的计算复杂度,证明了算法的可调度条件,给出了实验结果

A jitterless pinwheel scheduling algorithm for distributed multimedia tasks with distance constraints, DMSr, that removes candidates step by step to calculate periods in each node of distributed system is presented by Zhang Zhan Jun et al in 1999. This paper continues to study the issue of minimizing the total end to end delay. The concepts of delay and start phase are defined and the relation between delay, start phase and scheduling period is analyzed in this paper. It is proved that if the...

A jitterless pinwheel scheduling algorithm for distributed multimedia tasks with distance constraints, DMSr, that removes candidates step by step to calculate periods in each node of distributed system is presented by Zhang Zhan Jun et al in 1999. This paper continues to study the issue of minimizing the total end to end delay. The concepts of delay and start phase are defined and the relation between delay, start phase and scheduling period is analyzed in this paper. It is proved that if the total delay between nodes has a minimum value, it must be true that there is a delay with zero value, and transmission delay is a periodic function of the start phase with scheduling period. The delay is defined as a serrated line with a constant slope in this paper. To get the minimum delay, we can inspect all line segments in serrated line. But there are many drop points in the serrated line so that the complexity of searching algorithm is very high. In order to reduce the number of drop points searched, we define three operations, SUM, MAX and CUT for delay functions with period. The SUM is the sum of all delay function values. The MAX is the maximum of all delay function values. The CUT is domain size cut to partial size and keeps the minimum values and it not only cuts the domain size of serrated line, but also keeps their minimum values. An algorithm of calculating the start phase for minimizing the total end to end delay between two neighboring nodes, MinSum, is presented by above three operations and the time complexity is discussed in this paper. Next, we extend the MinSum to end to end delay by summing up any two consecutive nodes on router. Finally, we give our some simulation results of experiments near to the results from theory on a 100Mbps Ethernet switch.

作者于 1999年提出了一种分布式多媒体任务的风车调度算法 DMSr,它在分布式系统各节点上通过逐步消除候选项 ,计算出各任务的调度周期 ,使多媒体无抖动地传输 .在此基础上 ,作者继续研究了 DMSr风车调度延迟最小化问题 .文章定义了延迟时间和调度启动滞后时间概念 ,分析了调度启动滞后时间、调度周期和延迟时间之间的关系 ,证明了 DMSr调度传输延迟时间是启动滞后时间的周期性函数 ,延迟时间被描述为一组具有固定斜率的锯齿线段 ,并提出了一种启动滞后时间的计算算法 Min Sum ,它能使任务总延迟最小化 .

 
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