说明：  支持DVB-S,DVB-T,DVB-C的系统前端加扰和解扰过程，请注意加扰与加密不同，本程序包实现的是纯粹的加扰和解扰过程，不对KEY进行加密传输。要求输入测试文件时，请按照C语言的文件访问要求输入，如key.txt表示你要使用的KEY放在了名为key的txt文件中，不可写成“key.txt”。
(To support the DVB-S, DVB-T, DVB-C system front-end process of scrambling and descrambling, please note that different scrambling and encryption, the realization of this package is pure scrambling and descrambling process, not KEY encrypted transmission. Request to enter the test file, please follow the C language for the importation of the file access, such as key.txt that you want to use the KEY on the key named the txt file, can not be written key.txt .)