| 无线移动数字图书馆系统中多媒体检索的同步模式 |
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| 引用本文： | 党德鹏,周立柱. 无线移动数字图书馆系统中多媒体检索的同步模式[J]. 上海大学学报(英文版), 2006, 10(5): 409-414. DOI: 10.1007/s11741-006-0082-x |
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| 作者姓名： | 党德鹏 周立柱 |
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| 作者单位： | 1. 北京师范大学
2. 清华大学 |
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| 基金项目： | Project supported by National Natural Science Foundation of China (Grant No .60221120146) , National Basic Research Pro-gram of China ( Grant No . 973 -G1999032704) , and National Grand Fundamental Post Doctor Research of China (Grant No .2003034146) |
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| 摘 要： | 1IntroductionRecent advances in wireless communication,digitallibrary,distributed multi media,massive storage,andmobile computing technologies are sti mulating the de-velopment of mobile multi media digital library systems(M2DLS)that allow mobile clients to access multi me-dia material anywhere and anyti me over a cellular ra-dio network[1,2].In M2DLS,multi media objects,ingeneral,can be composed of multiple media streamssuch as audio and video,whose retrieval must proceedso as to not only …
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| 关 键 词： | 移动多媒体 数字图书馆 数据恢复 多媒体同步 分格式无线电网 |
| 文章编号： | 1007-6417（2006）05-0409-06 |
| 收稿时间： | 2004-12-01 |
| 修稿时间： | 2005-03-29 |
A synchronization scheme for multimedia retrieval in digital libraries over cellular radio networks |
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| De-peng Dang Ph. D.,Li-zhu Zhou. A synchronization scheme for multimedia retrieval in digital libraries over cellular radio networks[J]. Journal of Shanghai University(English Edition), 2006, 10(5): 409-414. DOI: 10.1007/s11741-006-0082-x |
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| Authors: | De-peng Dang Ph. D. Li-zhu Zhou |
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| Affiliation: | (1) College of Information Science and Technology, Beijing Normal University, 100875 Beijing, P.R. China;(2) Department of Computer Science and Technology, Tsinghua University, 100084 Beijing, P.R. China |
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| Abstract: | Recent advances in wireless mobile computing, digital library, and distributed multimedia technologies are stimulating the development of mobile multimedia digital library systems (M_2DLS) that allow mobile clients to access multimedia material anywhere and anytime over a cellular radio network. This paper addresses the problem of providing synchronized multimedia retrieval in these systems. An efficient inter-media synchronization scheme called wireless prioritized feedback (WPF) for mobile multimedia on-demand retrieval in digital library systems over CDMA cellular radio networks in the absence of synchronized clocks is presented. In the WPF scheme, base stations use preferential lightweight message called feedback units transmitted by mobile mediaphones to detect and correct asynchronies. The algorithm is described with pseudo code, and experiments are described to demonstrate the efficiency of WPF. |
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| Keywords: | mobile multimedia digital library multimedia retrieval multimedia synchronization. |
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