对称型全帧行扰乱电视图像加/解密器  

TV image encryption /de-encryption with symmetrical full-frame line scrambling

作　　者：张培忠 

机构地区：[1]宁波高专宁波三维技术研究所,浙江宁波315012

出　　处：《电视技术》2002年第1期96-98,共3页Video Engineering

摘　　要：介绍一种电视图像加/解密装置。加密器逐帧将标准电视图像(PAL制或NTSC制)扫描行的有效图像部分按预定的随机次序相互交换,获得无法辨认画面内容的加密电视信号,但信号本身仍符合原制式标准;解密器与加密器以同样方法工作,将加密电视信号恢复成原信号;加/解密器的随机次序是对称的,加密器本身可当自己的解密器,即一对加/解密器是一样的。本装置可应用到有特殊需求的闭路电视监视系统中。This paper introduces a kind of method and apparatus for encryption/decryption of television sig-nal.The encryption apparatus exchanges the video information portion of TV horizontal line per frame by pseudo random sequence which is stored in ROM beforehand,obtaining encrypted standard TV signal which content can't be understood.The decryption apparatus works with the same way as the encryption apparatus,retrieves o-riginal video information.The pseudorandom sequence is symmetrical.A pair of encryption/decryption apparatus are same absolutely.[

关 键 词：加密器 解密器 电视图像 全帧行扰乱 

分 类 号：TN941[电子电信—信号与信息处理]