通信工程文献翻译——摘要：作为一个可扩展的信令协议，RTCP协议可以应用在发展视频监控系统。传统的以RTP为基础的集中视频监控系统，由于监控服务器的能力和带宽利用率，其监测规模能力是有限的。本文着重研究如何随着视频监控系统的数量增加保持监视能力。在基于RTCP协议的研究中，我们分析现有的视频监控系统模型的缺点，并提出了视频监控系统的可扩展性的服务模式。通过本模型，额外的服务请求可以在合作的视频服务器上传输。本文从细节上介绍视频监控模型的控制策略。我们制定了基于上述模型的视频监控系统的原型。实验结果表明，该服务模式运作良好。

关键词： RTCP的视频监控系统；可伸缩性能力；服务模式

1导言

互联网技术的快速发展在IP网络上为多媒体视频监控系统提供了基础[1]。随着多媒体信息发送的功能，如文本，图形，音频和视频，视频监控系统打破了人类由于通信地理位置所带来的极限。目前，有两个标准支持视频会议系统的发展，即ITU-T的H.323和IETF建议的RTCP[2]。由于H.323遵循传统的电话信号模型，所以它是难以控制和扩展的。然而，RTCP协议是灵活开放的。因此，在本文中，RTCP是研究动态可伸缩视频会议系统所采用的基础。这里有一种视频模式监控系统：分散集中会议，充分分布和集中式多方视频监控会议[3]。他们共同的缺点是缺乏动态扩展，也就是说，它们在监测过程中不能够动态增加视频监控系统的容量。为了克服这一缺点，本文提出了一个基于RTCP的动态视频可伸缩的服务模式监视系统。在视频监控系统没有任何负面影响的前提下，系统能.......

Abstract—As an extensible signaling protocol, RTCP protocol can be applied in developing video surveillance system. Traditionally, for RTP-based centralized video surveillance system, surveillance scale is limited by both the capability of surveillance server and the availability of bandwidth. This paper focuses on how to keep surveillance capability when the number of video surveillance system increases. Based on the study of the RTCP Protocol, we analyze the drawback of the existing video surveillance system model, and propose the scalable service model for video surveillance system. By this model, the extra service requests can be transferred and served in the cooperated video servers. The paper presents the video surveillance control policy of the model in detail. We 

developed a prototype of video surveillance system based on above model. Experimental result show the service model works well 

Keywords-RTCP; Video Surveillance System; ; Capability Scalabilty; Service Model 

I. INTRODUCTION 

The fast development of Internet technologies has provided the basis for multimedia video surveillance system in IP network [1]. With the function of transmitting multimedia information, such as text, graphics, audio and video, Video surveillance system breaks the limit of human communication due to the geographical location of participants. At present, there are two standards to support 

the development of video conference systems, i.e. ITU-T H.323 and the RTCP recommended by the IETF [2]. Because H.323 follows the traditional telephony signal model, it is difficult to control and be extended. However,......