近年来，数字压缩技术的发展使数字卫星电视走进了我们的生活。随着首批可为观众接收的数字压缩电视节目的问世，全球的卫星公司都在走向数字时代。因为采用数字技术后，每个卫星转发器能同时转播5-6个数字频道，每个频道的广播成本可降低到目前成本的几分之一。1999年，世界大 In recent years, the development of digital compression technology has brought digital satellite television into our lives. With the advent of the first digitally compressed television programs available to viewers worldwide, satellite companies around the world are moving toward the digital age. Because using digital technology, each satellite transponder can broadcast 5-6 digital channels at the same time, each channel broadcast costs can be reduced to a fraction of the current cost. In 1999, the world was big