| 1. | Touch screen conference control
独特的会议直播 |
| 2. | However , ip multicast is generally unreliable , disordered and with redundant copies , and there is no reliable multicast protocol designed for multicast - based conference control
但是由于组播传输是不可靠的，所以难以实现基于组播的会议控制。 |
| 3. | But sip itself doesn " t support conference describing protocol nor does it provide conference control , which means it would not be used for the multipoint conference with centralized management
但是sip本身即不支持会议描述协议也不提供会议控制功能，不利于多点控制的会议的集中管理。而h |
| 4. | The system uses sip location server , media server and proxy server to realize conference control , media mixing and end - users interaction function respectively
本系统主要通过sip位置服务器来实现会议的呼叫控制,媒体服务器实现会议成员媒体流的混合分发,代理服务器提供终端用户与会议平台的交互接口。 |
| 5. | Supports mpeg4 for sony endpoints . itu - t h . 323 standard compliant and compatible with other h . 323 videoconferencing devices . flexible conference control and management via both client - based mcs manger and web ui
标准1u设计，集成了高性能的视音频处理能力，可同时并发多组会议，高达192个与会会场。 |
| 6. | In order to describe clearly about the whole flow of conference control we introduce petri network to tell how the control unit works . in the end of this article we discuss some useful techniques to resolve security problem which are also very important in the system
通过rtp rtcp封包解包的设计实现对网络的流量控制，其中实现了漏桶算法的思想，并给出rtp rtcp组帧的流程；文章还对视频会议系统所面临的安全问题进行简单的分析并概括了一般的实现方法。 |
| 7. | In order to solve this problem , a reliable multica st communication model for conference control is designed specially . we firstly study the requirements of multicast - based conference control , then analysis the main factors to the performance of reliable multicast . subsequently we present a new reliable multicast protocol named hsrm ( hierarchical scalable and reliable multicast ) according to the receivers " packet loss probabilities
本文从分布式组播会议控制对网络通信的要求出发，在对影响可靠组播性能的因素进行深入分析基础上，融合现有可靠组播协议的优秀思想，提出了一个新的基于接收方丢失报文概率分组的层次化可扩展可靠组播通信模型hsrm ( hierarchicalscalablereliablemulticast ) 。 |
| 8. | Through the analysis of sip proposed by ietf , the result shows that the conference mixing model in tightly coupled conference framework model is suitable to telecom carrier , this thesis brings forward a sip conference model suitable for ngn network , i . e . a separated model among conference control function , media mixing function and end - users interaction function
本文通过对当前ietf的sip会议混合模型和框架模型的分析,阐明适合电信运营管理的会议系统应采用紧耦合会议模式中的集中混合模型。通过对该模型的进一步改进,提出了一种适合于ngn网络构建多媒体会议系统的模型:即实现会议控制、媒体混合和用户交互三种功能模块分离的模型。 |
| 9. | As to the existing multicast - based conference systems , two choices are widely adopted : to keep the traditional centralized conference control structure with multicast only used for sending media data to those receivers who ca n ' t interact with others ; or to give up conference control at all with multicast used for interactive loosely coupled sessions including a small quantity of hosts
其结果是现有的会议系统或者保持传统的集中式会议控制结构，只将组播技术用于向没有交互权的接收者发送媒体数据；或者放弃会议控制，将组播技术应用于小规模松散型交互。 |
| 10. | As a result , it is no need for the endpoints to maintenance any system control task . in this article we propose a compactness coupling conference system architecture , and at the same time we analysis the system key techniques , giving a part of flow chart and pseudocode as examples . main content are given as below : how to use direcshow technique to obtain multimedia data ; multimedia data transport over ip network ; multicast principal and application in the system ; packing and unpacking rtp / rtcp packet so as to control network flow and in this part we introduce spillage arithmetic ; as the core part of the system , conference control and management are the main concern in our design
323框架基础上提出紧耦合式会议系统体系结构，并以c s结构作为实现模型；本文对会议系统的中心mcu流程进行分析设计，并建立数据结构；该部分还涉及到对各个资源的调度；为了对会议控制有更好的理解，用petri网描述了会议控制会议管理的过程并提出了灵活的授权管理机制；对服务器端的数据通信设计了多播通信的实现方案；本文简单回顾了directshow技术的应用，并在此基础上实现了多媒体数据的采集和回放；为实现多媒体在网络上实时传输选择不可靠传输协议udp ，为使数据能正确回放，采用了rtp和rtcp协议。 |
