发明授权
US07006630B2 Methods and apparatus for digital content protection 有权
数字内容保护的方法和装置

Methods and apparatus for digital content protection
摘要:
A multilayer digital content protection system, particularly for a digital cinema application is provided. Detection of unauthorized activity at the time it is occurring is provided using a first protection layer. Two layers of imperceptible watermarks, one camcorder viewable and one camcorder invisible are inserted into unauthorized copies of the digital content with second and third protection layers. Strong near infrared is also used to degrade the quality of any attempted unauthorized recording of digital content using a camcorder.
公开/授权文献
信息查询
0/0