| 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.
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