摘要
在网络中提供数字化音、视频等实时业务的多媒体多播通信是当前的研究热点 .运用分层编码技术 ,可将信源的媒体信息分成子媒体层进行传输 ;各信宿可根据用户各自需求或接入网络的限制接收不同编码信息 ,从而可以满足用户的异质性要求和网络的异质性条件 .研究了两种时延、带宽受限低代价的多播路由算法 ,这些算法充分考虑了异质性网络环境和实时媒体流的时延受限要求 ,比传统的多点广播算法更适于在异质性网络下的实时通信 .
To provide multicast for multimedia real time services, such as digital audio and video in networks, is one of the important issues in current research field. Using modern hierarchical coding techniques, source information can be partitioned into sub streams; each destination node,under its user's different requirement or access network's constraints, would receive partial coding signal. Using this method, users' different requirement or network's heterogeneous condition can be easily satisfied. In this paper, two bandwidth delay constrained low cost multicast routing algorithms are proposed, in which heterogeneous network's environment and real time media stream's delay constraint condition are considered fully, and thus are more useful for real time communication than the old ones in heterogeneous networks.
出处
《计算机研究与发展》
EI
CSCD
北大核心
2000年第12期1465-1470,共6页
Journal of Computer Research and Development
基金
国家科技项目基金(项目编号96-414-05-11)
铁道部科技发展基金(项目编号J99Z068)
关键词
多媒体通信
多播
受限优化
STEINER树
multimedia communication
multicast
constrained optimization
Steiner tree
