摘要
UCL(UniformContentLocator)是作者、编者和读者进行语义沟通的工具 ,是数据广播中解决接收端数据信息的快速选择、信息过滤、智能代理和信息的主动服务的基础 .本文系统地介绍了数据广播中UCL的概念 ,提出了在数据广播中进行UCL标引的方法和两级复用方法 ,研究了数据广播的UCL W标引方案 ,研究了多映射与复用技术 ,最后给出了在数据广播的传输过程中 ,发送端对数据信息进行采集、标引、映射、复用、格式转换和调制的工作流程 .实验验证了理论方案的正确性和有效性 .
UCL (Uniform Content Locator) builds a bridge between writer and reader for better understanding, which is a key technique for data processing such as receiving quickly, information filting, service intelligently and actively in data broadcasting. The methods of UCL-W indexing and multiplexing are put forward for Web service in data broadcasting, and the techniques of multimapping and bistage multiplex are studies. And then the flow diagram of the data processing, including data gather, UCL indexing, multimapping, multiplexing, data format transform, modulation, are figured out. The experiment result shows that the creative methods and the new designs are correct and efficiency based on DVB-C network.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2004年第10期1621-1624,1643,共5页
Acta Electronica Sinica
基金
国家 8 63计划项目 (No .2 0 0 2AA1 2 1 0 63)
国家自然科学基金 (No.60 2 72 0 1 4 )
关键词
数据广播
UCL
信息标引
DVB
Calculations
Data processing
Indexing (of information)
Information services
Multiplexing
World Wide Web
