公开(公告)号：EP1509828A2

公开(公告)日：2005-03-02

申请号：EP03725156.8

申请日：2003-05-06

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DERANGEWANDTEN FORSCHUNG E.V.

发明人： BRANDENBURG, Karlheinz ,  NEUBAUER, Christian ,  KULESSA, Ralph ,  SIEBENHAAR, Frank ,  SPINNLER, Wolfgang

IPC分类号： G06F1/00

CPC分类号： G06F21/10 ,  G06F2221/0737 ,  H04L9/08 ,  H04L9/30 ,  H04L2209/606

摘要： The invention relates to devices and methods for producing coded data, for reproducing coded data and for re-signing originally signed data based on the fact that the coded data in addition to the coded media information, comprises the necessary information for decoding the data in addition to a signature thereof which produces the coded data. The source of the coded data is thus traceable. Reproduction of coded data is allowed within defined limits by the producer of the coded data for friends or relatives for example, yet large-scale duplication of the coded data is seen as an act of piracy. The data pirate can be traced back by means of the signature, since the signature is optionally secured by means of an embedded water-mark signature. Since the issue at stake is a concept wherein only legal use should occur for coded data, unauthorised removal of the coding is a criminal act. The inventive concept enables the wrong doer to be determined and takes into account both the ownership status of the provider with regard to a defined reproduction of media information and also has the potentiality of being acceptable to the market.

摘要翻译： 本发明涉及一种设备及其制造方法的编码数据，用于再现的编码数据和用于重新签名基于所述factthat除了编码媒体信息的编码数据原始签署数据，包括必要的信息用于在另外的数据进行解码 到的签名其产生的编码数据。 的编码数据的源因此追踪。 编码数据的再现是通过对朋友或亲戚对于实施例的编码数据的生成者定义的限度内允许的，编码数据的再大规模重复被看作是作用盗版。 数据海盗可以通过签名来追溯，由于签名是任选被一个嵌入水印签名固定。 由于利害攸关的问题是一个概念worin唯一合法使用shoulderstand导致产生编码数据，未经授权擅自拆卸编码的是一种犯罪行为。 本发明的概念，使错误的实干家是确定性的开采，并考虑到对于一个定义的媒体信息再现无论是供应商的所有权地位，因此有被接受的市场潜力。

公开(公告)号：EP1382038A2

公开(公告)日：2004-01-21

申请号：EP02740586.9

申请日：2002-05-10

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DERANGEWANDTEN FORSCHUNG E.V.

发明人： HERRE, Jürgen ,  KULESSA, Ralph ,  NEUBAUER, Christian ,  SIEBENHAAR, Frank

IPC分类号： G11B20/00

CPC分类号： G10L19/018 ,  G10L19/02

摘要： The invention relates to a method for embedding a watermark in an audio signal, according to which a spectral representation of the audio signal and a spectral representation of the watermark signal are first determined (14, 16). The spectral representation of the watermark signal is then processed, based on a psychoacoustic masking threshold (24) of the audio signal (22). The processed watermark signal is combined with the audio signal (18). The spectral representation of the watermark signal is processed iteratively in the following way: a predetermined watermark initial value (26) is first selected; the interference that has been introduced into the spectral representation by the predetermined watermark initial value after a quantization of the spectral representation of the audio signal, is determined (28). The watermark initial value is then modified until said interference introduced into the spectral representation of the audio signal by a modified watermark initial value after quantization, is less than or equal to the predetermined interference threshold (32).