【作者】 刘渊；

【导师】 王开云；

【作者基本信息】 中国工程物理研究院北京研究生部 ， 计算机应用技术， 2000， 硕士

【摘要】 目前基于HFC（Hybrid Fiber Coax）的宽带数据广播作为广电、电信的数据服务增值业务正处于蓬勃发展的阶段，它为整个信息行业带来了新的机遇和希望。这篇文章所阐述的“高速数据广播系统”就是一个能够提供这种宽带数据广播业务的典型系统。 这篇文章着眼于整个“高速数据广播系统”，论述了其中的一个重要组成部分——多路软件传输平台，包括它的原理、设计及其具体实现，还较为充分地论述了该广播系统中与其有密切联系的用户授权子系统，并且将数据广播的两种典型业务，即文件节目广播及股票实时行情广播，作为软件传输平台的实际应用进行了较为详尽的阐述。 比较目前众多的宽带数据广播系统，文章里明确地提出了“软件传输平台”的概念，并且基于Linux操作系统成功地实现了这个“多路宽带数据广播系统软件传输平台”。它使该数据广播系统在信息数据传输方面具备了多路广播功能，既能够无分利用CATV（Community AntennaTelevision或Cable Television）网的宽带资源，又可以灵活分配和统一管理广播信道；在应用层软件设计方面具备了开放性，它为第三方软件开发商在广播系统上开发更加丰富的应用软件提供了非常方便和极为有利的条件；在用户授权方面实现了信息数据加密的动态更新和控制，提供了开放的加密算法接入口，使数据广播业务运营商对用户收费拥有了比较全面、可靠的控制权。更多还原

【Abstract】 At present, wideband data broadcasting system based on HFC(Hybrid Fiber Coax) having been greatly developed for the value-added digital service of radio and television systems and telecommunications. \h1ch brings new hope to IT industry. High-Speed Data Broadcasting System. which this paper wiH describe, is just such a typical wideband data broadcastinc system. In this paper, according to the whole High-Speed Data Broadcasting System, we discuss its one important component Multi-route Software Transmitting Platform, including the principle design and realization. Its Customer Right-granting Sub-system is also described in this paper, and also the platform two typical examples of application: File-program Broadcast and Stock Real-time Broadcast. Comparing with other wideband data broadcasting systems. we explicitl\ pointed out the concept software transmitting platform, and successfull\ realize such Multi-route Software Transmitting Platform based on Linu\ Operating System. Owing to this p.latform, our High-Speed Data Broadcasting S v stem gain many advantages. On information data transmission. the multi- route data broadcasting function makes the broadcasting system be able to Ilul oniy fully use the wideband resource of CATV(Community Antenna Television or Cable Television), but also neatly assign and unitedly manage the broadcast channels. For application layer software, the broadcasting system is an open system. It is very convenient for the application software providers to develop many kinds of application software for the broadcasting system. In customer rightranting, the dynamically renewal and control of information data encryption is realized, and the open encrypting algorithni interface is also provided. The data broadcast service providers now can roundly and reliably control the charge of its customers.更多还原