The content of this dissertation is about the technology of digital tv and embedded real - time system 包括数字电视系统及主要技术的介绍，数字电视机顶盒软硬件结构，嵌入式系统及实时操作系统分析。
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Chapter 3 describes the packet intercept method in detail for the system after the analysis to network architecture of the ms windows2000 and the comparison between the several popular packet intercept methods . the author make a deep research for the realization of ndis protocol drivers for ms windows2000 第三章：分析windows2000网络体系结构，结合windows2000操作系统分析比较几种流行的数据包截获技术，对windows2000下ndis协议驱动程序的实现原理进行了深入的探讨，并详细描述了本系统的数据包截获方法。
