直播卫星时代的出现正左右电视广播革命的下一步趋向。利用直播卫星用户可直接从卫星接收信号而不需要借助某些其它中继手段(例如,电缆电视,广播电视或多点分布服务台)。据估计,由于地理位置的原因,美国有500万个家庭接收不到任何电视节目,有2900万个家庭只能收到几个频道的节目。对于这些接收电视条件差的家庭,直播卫星将是极受欢迎的。对于有多频道服 The advent of the broadcast satellite era is leading the way toward the next step of the revolution in television broadcasting. Using Direct Broadcast Satellites Users receive signals directly from satellites without resorting to some other means of trunking, such as cable television, broadcast television, or multipoint distribution desks. It is estimated that 5 million families in the United States can not receive any television program due to their geographical location, and 29 million families can only receive programs on several channels. Direct broadcast satellites will be extremely popular for these poorly receiving households. For multi-channel service