在有线电视系统中，为确保有效管理和为收费电视服务，必须要引入加扰技术。加扰是将电视信号中的图像或伴音扰乱，以使非授权用户不能收到加扰节目，而授权用户则可以通过解扰，把加扰信号恢复成清晰的图像或伴音。在对电视信号的加扰中，加扰处理的方法很多，目前基本上可以 In cable television systems, scrambling techniques must be introduced to ensure efficient management and service of pay TV. Scramble is to scramble the video or audio in a television signal so that unauthorized users can not receive the scrambled program, and authorized users can descramble the scrambled signal back to a clear picture or sound. In the scrambling of television signals, there are many ways of scrambling processing, which is basically possible at present