公开(公告)号：WO1996027191A1

公开(公告)日：1996-09-06

申请号：PCT/GB1996000447

申请日：1996-02-28

Applicant: ISIS INNOVATION LIMITED ,  EDWARDS, David, John ,  STREET, Andrew, Michael ,  MOSS, Jonathan, Guy, Owen

Inventor： ISIS INNOVATION LIMITED

IPC: G11B20/00

CPC classification number: G06F21/10 ,  G06F2211/007 ,  G06F2221/0737 ,  G11B20/00086 ,  G11B20/0021 ,  G11B20/00557 ,  G11B20/00586 ,  G11B20/00913

Abstract: Apparatus and a method for applying to and retrieving from a work to be protected covert identification consists of a predetermined identification (12) which is encrypted using a pseudorandom code (11). The encrypted identification is then added (14) as a noise-like feature to a signal of the work to be protected. The apparatus and method may be used to introduce covert identification into a music recording for example on a CD, literature or pictures and even into telecommunication signals. As the identification is implemented as a noise-like feature in the work, the identification cannot easily be extracted without knowledge of both the identification and the encryption code employed.

Abstract translation: 用于应用于要被保护的工作的隐藏识别的装置和方法包括使用伪随机码（11）加密的预定标识（12）。 然后将加密标识作为类似噪声的特征添加（14）到要保护的工作的信号。 该装置和方法可用于将隐蔽识别引入音乐记录，例如在CD，文献或图像上甚至电信信号中。 由于识别被实现为工作中的类噪声特征，所以在不知道所采用的识别和加密码的情况下，不能容易地提取识别。