论文部分内容阅读
数字卫星电视是利用地球同步卫星将数字编码、压缩或加密的电视信号传输到用户端的一种广播电视形式。主要有两种方式:一种是卫星电视广播,将数字电视信号传送到有线电视前端,再由有线电视台转换成模拟电视信号传送到用户;另一种方式是卫星电视直播,用户直接接收数字电视信号。DVB-S标准提供了一套完整的适用于卫星传输的数字电视系统规范
Digital satellite television is a form of broadcast television that uses geostationary satellites to transmit digitally encoded, compressed or encrypted television signals to the client. There are two main ways: one is satellite television broadcasting, the digital television signal transmitted to the cable front-end, and then converted by cable television analog television signals transmitted to the user; the other way is satellite television broadcast, users receive digital TV directly signal. The DVB-S standard provides a complete set of digital TV system specifications for satellite transmission