论文标题:分布式技术在DAB中的应用
CHANNEL CODING RESEARCH OF WIRELESS OPTICAL CDMA
论文作者 李健
论文导师 朱钟淦；唐继勇,论文学位 硕士,论文专业 机械电子工程
论文单位 电子科技大学,点击次数 398,论文页数 59页File Size2782k
2000-12-01论文网 http://www.lw23.com/lunwen_348747/ 分布式系统,数字音频广播,DAB,数字多媒体广播, 应用程序服务器,电台自动播控
Distributed Systems, DAB, DMB, Application Server Auto Broadcast and Control in Broadcasting Station
本论文分析了数字音频广播（DAB）的产生、现状以及未来的发展。数字音频广播（DAB）向网络广播和数字多媒体广播（DMB）过渡是必然趋势。 数字音频广播（DAB）涉及到自动控制、数字信号处理和发送等各个方面。电台内部数字化的自动播控系统是整个DAB系统中重要的组成部份，当前普遍采用的两层Client/Server架构已经不能适应DAB的发展。 论文论述了分布式系统的基本设计思想以及特点，探讨了如何将分布式设计思想应用到电台自动播控网络系统设计中。 系统采用客户端、应用程序服务器和数据库服务器多层架构。使用VisualC++、Delphi开发系统的客户应用程序，选用SQL Server 7.0建立数据库。根据广播电台所需功能，在应用程序服务器建立企业对象对客户应用程序提供数据服务，并屏蔽数据库具体实现细节。利用SQL Server7.0提供的工具与应用程序服务器共同实现系统的冗余和负载平衡。 论文重点阐述了整个系统的实现过程，并在最后分析了系统的特点以及所出现的问题。
The paper analyze DAB"s produce, actuality and the development in future~ The trend for DAB is to transition to living broadcast in network and DMB. DAB relates to automation, DSP and DS Transmitting etc. Digital Auto Broadcast and Control in Broadcasting Station is the important part of the whole DAB system. The two layer of C/S frame couldn"t fit to the development of DAB. It discusses the essence design idea and characteristic of the distributed systems~ probes into how to the distributed systems applied in the automatic broadcast ?control systems in broadcasting station. It applies the multi-layer frame including client termination, application server and database server to structure auto broadcast and control system in broadcasting station. It uses Visual C++, Delphi to build the application in Client termination, selects SQL Server 7.0 to build Database. Basing Broadcasting Station needing function, The system builds enterprise object in the application program server to provide data server, shields the detail of the database before application program server. It utilizes the tool in SQL Server 7.0 and the application program server to realize the system"s redundance and the balance of load. The paper expatiate the realizing process of the system, and analyze the system"s special and arisen problem in conclusion.
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