数字卫星电视接收机的组成框图如图1所示。由图可知,数字卫星电视接收机由前端、后端、输出端三部分组成,用后端控制前端。按照模块结构来说,前端属于信道接收模块,后端属于系统解复用模块/MPEG-2解码模块,输出端属于附加功能模块。 Digital satellite TV receiver block diagram shown in Figure 1. As can be seen from the figure, the digital satellite TV receiver consists of three parts: front end, rear end and output end, and the rear end controls the front end. According to the module structure, the front end belongs to the channel receiving module, the rear end belongs to the system demultiplexing module / MPEG-2 decoding module, and the output end belongs to the additional function module.