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TV image encryption/de-encryption with symmetrical full-frame line scrambling
Author(s): 
Pages: 96-98
Year: Issue:  1
Journal: TV ENGINEERING

Keyword:  加密解密顺序对称扰序;
Abstract: 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.
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