有线电视网现状80年代中期以来,伴随着科学技术的不断进步,数据与数字技术、压缩编码技术、计算机与通讯技术、网络技术以及大功率多转发器卫星直播技术取得了突破性进展,并广泛应用于广播电视系统,使广播电视播出和传输产生了质的飞跃,开创了以数字式群信号播出的新纪元。经过 CATV Network Since the mid-1980s, with the continuous advancement of science and technology, breakthroughs have been made in data and digital technology, compression coding technology, computer and communication technology, network technology and high-power multi-transponder satellite live broadcasting technology, Applied to radio and television systems, radio and television broadcasting and transmission made a qualitative leap in the digital community opened a new era of signal broadcast. after