摘要
对于远程教学直播系统这样包含不同媒体流的分布式多媒体应用而言,媒体同步是一项重要内容。利用RTP(实时传输协议)传输机制中的时间戳和序列号信息,提出同步控制算法,实现了流内同步和流间同步。考虑到分组网络带来的延时抖动,算法可以动态地适应网络延时变化,从而保证了分布式环境中媒体同步的服务质量。
The synchronization between various kinds of data is an important issue in distributed multimedia applications like live lecture system for distance learning incorporating continuous and independent discrete media stream. To manage the synchronization presentation of different media, a synchronization mechanism was proposed which used control information such as timestamp and sequence number provided by RTP （Real-time Transport Protocol） to implement intra-media synchronization and inter-synchronization synchronization. Considering some troubles like packet loss and transport jitter caused by non-Qos packet based network, the proposed method could adjust evaluations based on the network delay to guarantee the required quality of service for multimedia synchronization in the distributed environment.
出处
《计算机工程与设计》
CSCD
北大核心
2005年第11期3138-3140,3143,共4页
Computer Engineering and Design
关键词
远程教学
RTP
流内同步
流间同步
distance learning
RTP
intra-media synchronization
inter-media synchronization
