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公开(公告)号：US20070168673A1
公开(公告)日：2007-07-19
申请号：US10596928
申请日：2005-01-12
IPC分类号： H04L9/00
CPC分类号： G11B20/00181 , G10L19/018 , G11B20/00086 , G11B20/00144 , G11B20/00289 , G11B20/00557 , G11B20/00884
摘要： A method of dynamically allocating payload bits in a watermarking system (10) is provided. The method including steps of: (a) determining one or more parameters to be conveyed in bits of a payload to be included in watermark information for embedding in programme content; (b) dynamically allocating the bits to corresponding of the one or more parameters so as to represent the one or more parameters in the payload; (c) including the payload in the watermark information; and (d) embedding the watermark information including the payload into the programme content. Such dynamic allocation of payload bits is capable of providing more effective use of payload capacity.
摘要翻译： 提供了一种在水印系统（10）中动态分配有效负载比特的方法。 该方法包括以下步骤：（a）确定要包含在用于嵌入节目内容的水印信息中的有效载荷的比特中要传送的一个或多个参数; （b）将所述比特动态地分配给所述一个或多个参数的对应，以便表示所述有效载荷中的一个或多个参数; （c）在水印信息中包括有效载荷; 和（d）将包括有效载荷的水印信息嵌入到节目内容中。 有效载荷比特的这种动态分配能够提供更有效地使用有效负载能力。
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公开(公告)号：US20060161776A1
公开(公告)日：2006-07-20
申请号：US10564295
申请日：2004-07-02
IPC分类号： H04L9/00
CPC分类号： G11B20/00884 , G11B20/00086 , G11B20/00173
摘要： The present invention relates to methods, devices and a signal related to simplifying the embedding of watermarks in different copies of a media signal (x). The watermarking process is split into two parts, one that is based on signal dependent properties and one that is based on watermark specific properties. The signal dependent properties are determined in advance, while the watermark specific properties are determined at the time of delivery of the media signal. The signal dependent watermarking properties (p) of a media signal (x) are determined in a properties determining unit (14) and stored in a signal properties store (16), such that the signal dependent properties can be used for embedding more than one watermark (WA, WB, WC) in different copies of the media signal. In this way it is possible to embed watermarks in multiple copies of the same media signal with small time delays.
摘要翻译： 本发明涉及方法，设备和与简化在媒体信号（x）的不同副本中嵌入水印有关的信号。 水印过程被分为两部分，一个是基于信号相关属性，一个基于水印特定属性。 信号相关属性是预先确定的，而在传送媒体信号时确定水印特定属性。 媒体信号（x）的信号相关水印属性（p）在属性确定单元（14）中确定并存储在信号属性存储器（16）中，使得信号相关属性可用于嵌入多于一个 在媒体信号的不同副本中的水印（W SUB，W B，W C C）。 以这种方式，可以以小的时间延迟将水印嵌入相同媒体信号的多个副本中。
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公开(公告)号：US20060161777A1
公开(公告)日：2006-07-20
申请号：US10564421
申请日：2004-07-05
IPC分类号： H04L9/00
CPC分类号： G10L19/018 , G11B20/00086 , G11B20/00123 , G11B20/00884
摘要： Disclosed are methods and systems for embedding and for detecting digital watermarks in information signals. The method of embedding a watermark comprises the steps of providing a watermark secret (106), embedding (107) a digital watermark in an information signal (101) where said embedding is controlled by the watermark secret, calculating (102) a digital fingerprint (103) from the information signal, and storing (104) the calculated digital fingerprint as a reference digital fingerprint and storing, in relation to the reference digital fingerprint, a identifier data item from which the watermark secret can be derived.
摘要翻译： 公开了用于在信息信号中嵌入和检测数字水印的方法和系统。 嵌入水印的方法包括以下步骤：提供水印秘密（106），将数字水印嵌入（107）到信息信号（101）中，其中所述嵌入由水印秘密控制，计算（102）数字指纹（ 103），并存储（104）所计算的数字指纹作为参考数字指纹，并且相对于参考数字指纹存储可从其导出水印秘密的标识符数据项。
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公开(公告)号：US20060075239A1
公开(公告)日：2006-04-06
申请号：US10542891
申请日：2003-12-16
IPC分类号： H04L9/00
CPC分类号： G06T1/0071 , G06T2201/0083
摘要： In order to enable a data signal, such as an audio or video signal, to be marked with multiple watermarks a set of different codes or keys is used within a given application field. The set of codes/keys is known to a watermark embedder (20) and a watermark detector (22). In each watermark embedding step, whether it is a first embedding step or a subsequent embedding step, a different key is used. The embedder (22) includes a data extractor (24) for determining which key or keys has or have been used previously. A data generator (26) then selects a new key from the set of known keys.
摘要翻译： 为了使数据信号（例如音频或视频信号）能够用多个水印进行标记，在给定的应用领域内使用一组不同的代码或密钥。 水印嵌入器（20）和水印检测器（22）已知该组代码/键。 在每个水印嵌入步骤中，无论是第一嵌入步骤还是后续嵌入步骤，使用不同的键。 嵌入器（22）包括数据提取器（24），用于确定先前使用或已经使用过哪些键或键。 然后，数据发生器（26）从该组已知的密钥中选择一个新密钥。
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公开(公告)号：US20090013188A1
公开(公告)日：2009-01-08
申请号：US12162369
申请日：2007-01-29
IPC分类号： H04L9/00
CPC分类号： G06T1/005 , G06T2201/0065
摘要： The invention relates to a method of searching for a watermark in a data signal, and to a watermark detector, such as a copy-control watermark detector. The search is conducted in order to find a watermark in content which possibly has been attacked and/or altered. The search is conducted by the steps of determining or setting a search space for the data signal, selecting a subspace of the search space, and searching for the presence of the watermark in the subspace. The subspace may be selected from a multitude of regions, the selection e.g. being based on a deterministic or probabilistic function.
摘要翻译： 本发明涉及一种在数据信号中搜索水印的方法以及诸如拷贝控制水印检测器之类的水印检测器。 进行搜索以便在可能已被攻击和/或改变的内容中找到水印。 通过确定或设置数据信号的搜索空间，选择搜索空间的子空间以及在子空间中搜索水印的存在的步骤进行搜索。 子空间可以从多个区域中选择，例如， 基于确定性或概率函数。
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公开(公告)号：US20080310629A1
公开(公告)日：2008-12-18
申请号：US12094638
申请日：2006-11-10
IPC分类号： G06T1/00
CPC分类号： G06T1/005
摘要： The invention relates to embedding auxiliary data in the form of a multibit payload in a host signal, and encrypting the associated detection key. Moreover, the invention relates to extracting the auxiliary data in the form of the multibit payload from a data signal. Auxiliary data is embedded in a host signal by the following steps. First a reference watermark is provided, subsequently an encrypted detection key associated only with the reference watermark is generated. The encrypted detection key may be a scrambled version of the watermark. In a further step, the multibit watermark is generated and a multibit payload is encoded into the reference watermark. Finally, the multibit watermark is embedded into the host signal.
摘要翻译： 本发明涉及以主机信号中的多位有效载荷的形式嵌入辅助数据，并加密相关的检测密钥。 此外，本发明涉及从数据信号中提取多位有效载荷形式的辅助数据。 辅助数据通过以下步骤嵌入到主机信号中。 首先，提供参考水印，随后生成与参考水印相关联的加密检测密钥。 加密检测密钥可以是水印的加扰版本。 在另一步骤中，生成多比特水印并将多比特有效载荷编码为参考水印。 最后，将多位水印嵌入到主机信号中。
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公开(公告)号：US20080106373A1
公开(公告)日：2008-05-08
申请号：US11916096
申请日：2006-05-23
IPC分类号： G05B19/00
CPC分类号： G11B20/00086 , G07C9/00158 , G11B20/00123 , G11B20/00173 , H04L9/3231 , H04L2209/08 , H04L2209/56
摘要： The invention relates to a method of authenticating a physical object using a helper data and a control value associated with a reference object, the method comprising: acquiring a metric data of the physical object, generating a first property set using a noise compensating mapping on input data derived from information comprising said helper data and metric data, establishing a sufficient match between said physical and reference object using said property set and control value. The method further comprising a step to generate a noise measure, the step comprising the following sub-steps: reconstructing the output of a noise robust mapping generated during the enrolment of the reference object using the noise compensating mapping, and generating the noise measure by calculating the difference between the input to the noise compensating mapping and the output of the noise robust mapping. Also provided are an apparatus and system configured to carry out the method.
摘要翻译： 本发明涉及使用辅助数据和与参考对象相关联的控制值来认证物理对象的方法，该方法包括：获取物理对象的度量数据，使用输入上的噪声补偿映射生成第一属性集 从包括所述辅助数据和度量数据的信息导出的数据，使用所述属性集和控制值在所述物理参考对象之间建立足够的匹配。 该方法还包括产生噪声测量的步骤，该步骤包括以下子步骤：使用噪声补偿映射重建在参考对象的登记期间生成的噪声鲁棒映射的输出，以及通过计算产生噪声测量值 噪声补偿映射的输入与噪声鲁棒映射的输出之间的差异。 还提供了一种被配置为执行该方法的装置和系统。
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公开(公告)号：US20070220265A1
公开(公告)日：2007-09-20
申请号：US11570440
申请日：2005-06-08
IPC分类号： H04L9/36
CPC分类号： G06T1/0064
摘要： There is provided a watermark detector (20) including an input for receiving an input signal (Y′) including watermark content (W) to be searched. A first processor (40) of the detector (20) is operable to analyse portions (100, 110, 120) of the signal (Y′) to identify corresponding sets of characteristic properties or fingerprints (P1 to Pq) and associated temporal descriptors (d1 to dq). A communication link to a database (50) is provided for communicating the fingerprints to the database (50) to identify the signal and to determine corresponding temporal descriptors (MT1 to MTq) corresponding to the portions (100, 110, 120) in the original signal. A second processor (220) is included for calculating from a difference between the temporal descriptors (d1 to dq) and the retrieved temporal descriptors (MT1 to MTq) a scaling factor to which the input signal (Y′) has been subjected. The scaling factor is useable for re-scaling the signal and extracting the watermark from the rescaled signal (Y′).
摘要翻译： 提供了一种水印检测器（20），其包括用于接收包括要搜索的水印内容（W）的输入信号（Y'）的输入。 检测器（20）的第一处理器（40）可操作以分析信号（Y'）的部分（100,110,120），以识别特定特性或指纹的对应集合（P < ）和相关联的时间描述符（d <1>至d> q）。 提供到数据库（50）的通信链路用于将指纹传送到数据库（50）以识别信号并且确定相应的时间描述符（MT 到MT ）对应于原始信号中的部分（100,110,120）。 包括第二处理器（220），用于根据时间描述符（d 1> 1至d q q）之间的差值和所检索的时间描述符（MT＆lt; 1＆gt; 1＆ 对于输入信号（Y'）已经经受的缩放因子。 缩放因子可用于重新缩放信号并从重新缩放的信号（Y'）提取水印。
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公开(公告)号：US20060257001A1
公开(公告)日：2006-11-16
申请号：US10570532
申请日：2004-08-26
IPC分类号： G06K9/00
CPC分类号： H04N21/235 , G06T1/005 , G06T2201/0063 , G10L19/018 , G11B20/00086 , G11B20/00144 , G11B20/00891 , G11B20/00905 , H04N1/00005 , H04N1/00037 , H04N1/32144 , H04N1/3232 , H04N21/435 , H04N2201/3239 , H04N2201/327
摘要： The invention relates to watermarking systems, which irregularly change the embedded watermark so as to avoid hacking the system by averaging-attacks. In averaging attacks, segments of the watermarked signal are accumulated. This causes the host signal to be cancelled out whereas the embedded watermark accumulates coherently. A watermark A thus determined is then subtracted by a hacker from the watermarked signal. This invention exploits the insight that the hacker does not know when the embedded watermark changes (from A to B, or from A to none). Accordingly, fragments of the hacked signal will contain the negative watermark—A being unintentionally embedded by the hacker. This causes the watermark detector to produce a correlation peak of opposite polarity. The invention resides in the detection of such a negative peak, and concluding therefrom that the signal has been tampered. The payload of the watermark is preserved. This provides the possibility to trace back the hacker.
摘要翻译： 本发明涉及水印系统，其不规则地改变嵌入的水印，以避免通过平均攻击来攻击系统。 在平均攻击中，水印信号的段被累积。 这使得主机信号被抵消，而嵌入的水印相干地累积。 这样确定的水印A然后由黑客从加水印的信号中减去。 本发明利用了黑客不知道何时嵌入的水印变化（从A到B，或从A变为无）的见解。 因此，被黑客信号的片段将包含由黑客无意嵌入的负水印-A。 这使得水印检测器产生相反极性的相关峰值。 本发明在于检测这样一个负峰值，并从中得出结论信号已被篡改。 保留水印的有效载荷。 这样可以追溯黑客。
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公开(公告)号：US20050025314A1
公开(公告)日：2005-02-03
申请号：US10495537
申请日：2002-10-24
CPC分类号： G10L19/018 , G10L19/02 , G11B20/00891
摘要： Disclosed is a method of adjusting a supplementary data signal (wm(n)) to be embedded in an information signal (x(n)), for example an audio signal. The method comprises the steps of determining (107) a relative magnitude (g(n)) of a first property function (Mx(n)) of the information signal averaged over a region of a predetermined size and a second property function (Mwm(n)) of the supplementary data signal averaged over said region; and adjusting (407) the supplementary data signal according to the determined relative magnitude.
摘要翻译： 公开了一种调整要嵌入在信息信号（x（n））中的补充数据信号（wm（n））的方法，例如音频信号。 该方法包括以下步骤：确定（107）在预定大小的区域上平均的信息信号的第一属性函数（Mx（n））的相对幅度（g（n））和第二属性函数（Mwm n））在所述区域上平均的补充数据信号; 以及根据确定的相对幅度调整（407）所述补充数据信号。
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