基于MSH263编码器协同系统的设计与实现  

Research and implementation of a MSH263 codec based collaborative system

作　　者：盛向治[1] 诸彤宇[1] 

机构地区：[1]北京市海淀区北京航空航天大学软件开发环境国家重点实验室,北京市100083

出　　处：《微计算机信息》2008年第9期173-174,51,共3页Control & Automation

基　　金：973课题<实时协同可生存的海量信息系统的试验与验证平台>(2005CB321903)

摘　　要：使用代理动态链接库对Windows(R)Net Meeting(R)调用MSH263编码的过程进行了记录。通过与标准调用序列的对比,发现了未公开的两个ICM消息和一组状态数据,使得MSH263编码器可以在用户程序中应用。给出了MSH263编码帧中隐含的RTP切分索引数据格式,并由此提出了快速切分算法。基于以上方法构造的实时多媒体协同系统,可以与AccessGrid及H.323系统良好互通,已成功应用于多项国家级项目。Created a proxy dynamic link library to record call sequence of Windows(R) NetMeeting(R) on MSH263 codec. By compared with standard sequence, two undocumented ICM messages and a state block was opened out, which made using MSH263 in user application possible. The format of RTP fragmenting hint which is hidden in compressed picture was supposed. A quick division arithmetic was developed on that. The real-time multimedia collaborative system based on techniques mentioned above can cooperate with AccessGrid an...

关 键 词：H.263 视频压缩 实时协同 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]