The following six chapters analyze the six modules: Satellite programreceiving, channel multicasting, program storing, multicasting server buffering , VODservice and End-User receiving, illuminate the key technology of each module.

• 第三章到第八章分别介绍了组成系统的六个模块：卫星节目流接收模块、频道组播管理模块、频道节目存储模块、组播服务器缓冲区管理模块、视频点播服务模块、终端接收模块，详细分析了每个模块涉及到的关键技术，给出了实现。