数字视频广播（DVB）；DVB SimulCrypt第1部分和第2部分介绍了前端两个或多个条件接收系统之间的互操作性要求。第1部分规定了系统架构、时序关系和mes架构。第2部分规定了扩展的互操作性和控制。系统架构内的组件代表功能单元。物理设备单元之间的边界不需要精确匹配功能单元之间的边界。SCS可能位于MUX中，或者SCS和MUX可以独立构建。 这两种架构都不是强制性的。

Digital Video Broadcasting (DVB); DVB SimulCrypt Parts 1 and 2 address the requirements for interoperability between two or more conditional access systems at a head-end. Part 1 Specifies the system architecture, timing relationships and mes saging structures. Part 2 Specifies extended interoperability and control. The components within the system architecture represent functional uni ts. The boundaries between physical equipments units are not required to match exactly the boundaries between functional units. It is possib le that the SCS could be in the MUX or the SCS and MUX could be built independently. Neither architecture is mandated.