IP网络视频会议系统中视频子系统的研究与实现  

Studying and realizing of video subsystem in IP network video conference system

作　　者：王中元[1] 胡瑞敏[1] 傅佑铭[1] 边学工[1] 

机构地区：[1]武汉大学国家多媒体软件工程研究中心,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2006年第6期34-38,共5页Engineering Journal of Wuhan University

摘　　要：研究了IP网络视频会议系统中视频子系统设计中的采样信号前处理、视频编解码与数据包传输等问题.介绍了每个问题产生的背景,并对提出的算法原理和算法步骤进行了详细描述.针对传输丢包现象和视频多点处理器的运算能力限制,对每个问题在解决方法上都有所改进或创新.研究成果应用到实际的SIP视频会议系统中,显著地提高了系统的视频性能技术指标.Several problems of video encoding and decoding subsystem design in IP network video conference system, such as sampling signal preprocessing, video coding and decoding, packet transmission, are presented. For such problems, after introducing their background, their solutions are found; and algorithm steps are described in detail. In terms of packet loss during transmission and calculation capacity limit to MPU, some technical renovations are discussed also. These results are incorporated into a reallife SIP system, which achieves outstanding video performance improvement.

关 键 词：视频会议 视频编解码 视频通信 SIP 

分 类 号：TP37[自动化与计算机技术—计算机系统结构]