针对目前网络教育的实际情况,分析网络教学系统建设需求的基础上,论述了一个基于Flash Media Server技术的网络视频教学系统的总体设计.以.NET和Flash Media Server技术为支撑,对系统中"音视频录制和直播"、"观看音视频...针对目前网络教育的实际情况,分析网络教学系统建设需求的基础上,论述了一个基于Flash Media Server技术的网络视频教学系统的总体设计.以.NET和Flash Media Server技术为支撑,对系统中"音视频录制和直播"、"观看音视频流"、"视频文件上传"、"双向视频交流"等核心功能模块进行了详细的分析,提出了合理的解决方案.为学生提供了可视化、直观的视频课程平台,极大增强了客户端的用户体验感,减轻了服务器的压力,展现了Flash Media Server技术在视频教学中的强大优势.展开更多
采用Flash Media Server流媒体服务器技术,基于TCP/IP和RTMP协议,设计开发了远程视频教学系统,介绍了该系统在线视频教学功能、电子白板教学功能、视频录制与点播功能和在线答疑教学功能的设计与实现方法,最后采用Fiddler软件对其进行...采用Flash Media Server流媒体服务器技术,基于TCP/IP和RTMP协议,设计开发了远程视频教学系统,介绍了该系统在线视频教学功能、电子白板教学功能、视频录制与点播功能和在线答疑教学功能的设计与实现方法,最后采用Fiddler软件对其进行功能测试.结果显示,该系统具有良好的实时性和稳定性,不仅增强了网络教学过程中的交互性与实时性,同时也为网络公开课程的进一步发展提供了技术思路与方案借鉴.展开更多
HTTP动态流技术是Adobe公司伴随Flash Media Server 4.5推出的一项最新的HT-TP渐进下载技术,Flash Media Server 4.5能够将实时或预先录制的内容打包至可高速缓存的碎片中,这样可以支持完全的流媒体功能,结合HTTP动态流技术,充分利用现...HTTP动态流技术是Adobe公司伴随Flash Media Server 4.5推出的一项最新的HT-TP渐进下载技术,Flash Media Server 4.5能够将实时或预先录制的内容打包至可高速缓存的碎片中,这样可以支持完全的流媒体功能,结合HTTP动态流技术,充分利用现有的HTTP基础设施的优势,通过对视频源文件的特殊处理,可以将多比特率Flash流媒体内容更方便地呈现给流媒体用户,改善并提升用户的视频体验质量。展开更多
Based on the system feature of softswitch-based heterogeneous clustered media server, this paper proposed a limited resource vector load-balancing algorithm. The purpose of the algorithm was to balance the load of clu...Based on the system feature of softswitch-based heterogeneous clustered media server, this paper proposed a limited resource vector load-balancing algorithm. The purpose of the algorithm was to balance the load of clusters by utilizing all system resources effectively and to avoid violent shaking of the system per- formance. A lot of simulations on the Petri net model of load balance system are conducted and the algorithm is compared with some traditional algorithms on balancing ability for heterogeneity, system throughput, re- quest response time and performance stability. The results of simulations show that the algorithm achieves system higher performance and it has excellent ability to deal with the heterogeneity of clustered media server.展开更多
Based on the demand of the admission control of softswitch-based clustered media server, this pa- per proposed a new dynamic quota-based admission control algorithm that has a sub-negotiation process. The strongpoint ...Based on the demand of the admission control of softswitch-based clustered media server, this pa- per proposed a new dynamic quota-based admission control algorithm that has a sub-negotiation process. The strongpoint of quota-based algorithm had been inherited in the algorithm and at the same time some new ideas had also been introduced into it. Simulations of the algorithm had been conducted on the Petri net model and the results show that this algorithm has excellent performance. In order to find the optimal resource quota set- ting in real time, the paper proposed two approximation analysis methods. It can be seen from analysis results that these two methods can be used to get sub-optimal quota values quickly and effectively. These two ap- proximation analysis methods will play important roles in implementation of the algorithm in system.展开更多
为更好的构建远程教育平台,解决目前所面临的技术难题,开发低成本、高效率的远程教育系统成为市场的一大热点,FLASH公司推出的Flash Media Server2技术为实现这一目标提供了强有力的支持,应用该技术可以开发出功能完善、易于操作、成本...为更好的构建远程教育平台,解决目前所面临的技术难题,开发低成本、高效率的远程教育系统成为市场的一大热点,FLASH公司推出的Flash Media Server2技术为实现这一目标提供了强有力的支持,应用该技术可以开发出功能完善、易于操作、成本较低的远程教育系统。展开更多
随着网络带宽的增加及F l as h技术的发展,宽带网络中直播的视频及音频应用越来越广,在线用户使用平台多元化windows电脑、苹果手机,安卓手机,以前流媒体技术已无法满足应用系统的需求。为解决此问题,介绍了流媒体新的方案,并阐述了如...随着网络带宽的增加及F l as h技术的发展,宽带网络中直播的视频及音频应用越来越广,在线用户使用平台多元化windows电脑、苹果手机,安卓手机,以前流媒体技术已无法满足应用系统的需求。为解决此问题,介绍了流媒体新的方案,并阐述了如何实现Flash Media Server流媒体跨平台直播。展开更多
文摘针对目前网络教育的实际情况,分析网络教学系统建设需求的基础上,论述了一个基于Flash Media Server技术的网络视频教学系统的总体设计.以.NET和Flash Media Server技术为支撑,对系统中"音视频录制和直播"、"观看音视频流"、"视频文件上传"、"双向视频交流"等核心功能模块进行了详细的分析,提出了合理的解决方案.为学生提供了可视化、直观的视频课程平台,极大增强了客户端的用户体验感,减轻了服务器的压力,展现了Flash Media Server技术在视频教学中的强大优势.
文摘采用Flash Media Server流媒体服务器技术,基于TCP/IP和RTMP协议,设计开发了远程视频教学系统,介绍了该系统在线视频教学功能、电子白板教学功能、视频录制与点播功能和在线答疑教学功能的设计与实现方法,最后采用Fiddler软件对其进行功能测试.结果显示,该系统具有良好的实时性和稳定性,不仅增强了网络教学过程中的交互性与实时性,同时也为网络公开课程的进一步发展提供了技术思路与方案借鉴.
文摘HTTP动态流技术是Adobe公司伴随Flash Media Server 4.5推出的一项最新的HT-TP渐进下载技术,Flash Media Server 4.5能够将实时或预先录制的内容打包至可高速缓存的碎片中,这样可以支持完全的流媒体功能,结合HTTP动态流技术,充分利用现有的HTTP基础设施的优势,通过对视频源文件的特殊处理,可以将多比特率Flash流媒体内容更方便地呈现给流媒体用户,改善并提升用户的视频体验质量。
基金Supported by: (1) Specialized Research Fund for the Doctoral Program of Higher Education (No. 20030013006) (2) National Specialized R&D Project for the Product of Mobile Communications (Develop-ment and Application of Next Generation Mobile Intel-ligent Network System) (3) Development Fund for Electronic and Information Industry (Value-added Ser-vice Platform and Application System for Mobile Communications).
文摘Based on the system feature of softswitch-based heterogeneous clustered media server, this paper proposed a limited resource vector load-balancing algorithm. The purpose of the algorithm was to balance the load of clusters by utilizing all system resources effectively and to avoid violent shaking of the system per- formance. A lot of simulations on the Petri net model of load balance system are conducted and the algorithm is compared with some traditional algorithms on balancing ability for heterogeneity, system throughput, re- quest response time and performance stability. The results of simulations show that the algorithm achieves system higher performance and it has excellent ability to deal with the heterogeneity of clustered media server.
基金(1) Specialized Research Fund for the Doctoral Program of Higher Education (No.20030013006) (2) National Specialized R&D Pro-ject for the Product of Mobile Communications (Devel-opment and Application of Next Generation Mobile In-telligent Network System) (3) Development Fund for Electronic and Information Industry (Value-added Ser-vice Platform and Application System for Mobile Communications).
文摘Based on the demand of the admission control of softswitch-based clustered media server, this pa- per proposed a new dynamic quota-based admission control algorithm that has a sub-negotiation process. The strongpoint of quota-based algorithm had been inherited in the algorithm and at the same time some new ideas had also been introduced into it. Simulations of the algorithm had been conducted on the Petri net model and the results show that this algorithm has excellent performance. In order to find the optimal resource quota set- ting in real time, the paper proposed two approximation analysis methods. It can be seen from analysis results that these two methods can be used to get sub-optimal quota values quickly and effectively. These two ap- proximation analysis methods will play important roles in implementation of the algorithm in system.
