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对现有的有线和卫星直播数字电视机顶盒作了功能和结构描述，并分别提出了具体的设计与实现方案，包括用ＬＳＩＬｏｇｉｃ 公司的系列芯片实现的有线电视机顶盒（Ｃａｂｌｅ ＳＴＢ）方案，以及用ＴＩ公司的单片集成ＳＴＢ芯片实现的卫星直播机顶盒（ＤＢＳＳＴＢ）方案．探讨了交互式视频服务对机顶盒提出的功能和结构上的新要求，机顶盒除了要具有基本的ＳＴＢ的节目接受功能外，还要具有和通讯网关及视频服务器交互的能力．文中就其在硬件结构、软件结构、接口标准化与互操作性等方面的进一步要求作了较详细的分析
The functional and structural description of the existing cable and satellite live digital TV set-top boxes are given, and the specific design and implementation solutions are respectively presented, including the cable STB solution implemented by the LSILogic chips and the solutions provided by TI The company’s monolithic integrated STB chip satellite direct broadcast set-top box (DBSSTB) program. In addition to the basic STB program acceptance function, the STB also has the ability to interact with the communication gateway and the video server. In this paper, its further requirements in hardware structure, software structure, interface standardization and interoperability are analyzed in more detail