| 远程教学直播系统中媒体同步的研究与实现 |
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| 引用本文： | 杨锐,丁振国,王闵.远程教学直播系统中媒体同步的研究与实现[J].计算机工程与设计,2005,26(11):3138-3140,3143. |
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| 作者姓名： | 杨锐 丁振国 王闵 |
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| 作者单位： | 西安电子科技大学,计算机学院,陕西,西安,710071 |
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| 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。
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| 关 键 词： | 远程教学 RTP 流内同步 流间同步 |
| 文章编号： | 1000-7024（2005）11-3138-03 |
| 收稿时间： | 2004-09-16 |
| 修稿时间： | 2004-09-16 |
Study on multimedia synchronization in live lecture system for distance education |
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| YANG Rui,DING Zhen-guo,WANG Min.Study on multimedia synchronization in live lecture system for distance education[J].Computer Engineering and Design,2005,26(11):3138-3140,3143. |
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| Authors: | YANG Rui DING Zhen-guo WANG Min |
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| Abstract: | The synchronization between various kinds of data is an important issue in distributed multimedia applications like live lecture system for distance learning incorporating continuousand independentdiscrete media stream.To managethe 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 sometroubleslike 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 en-vironment. |
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| Keywords: | distance learning RTP intra-media synchronization inter-media synchronization |
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