付费电视系统所采用的加解扰技术随着电子、微电子工业的进步正在从低级向中、高级水平飞速发展。迄今为止,加扰技术方案在实践中使用已不下几十种,其中有些方案已趋落后而被淘汰,有些方案正在使用并有所发展;如今国际上已从模拟/数字加扰朝着安全性更高、图象质量几乎不受损伤的数码 Ad-plus-descramble technology used in pay-TV systems As the electronics and microelectronics industries are progressing from low-level to medium-to-high level, they are rapidly evolving. So far, scrambled technology solutions have been used in practice no fewer than a dozen. Some of these solutions have been phased out and are phased out. Some programs are in use and have been developed. Nowadays, the scrambled technology has been moving from analog / digital scrambling to security Higher, the image quality is almost intact digital