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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：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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公开(公告)号：US20050240767A1
公开(公告)日：2005-10-27
申请号：US10516145
申请日：2003-05-21
CPC分类号： G06T1/0028 , H04N1/32149 , H04N1/32304 , H04N2201/3239 , H04N2201/324
摘要： Methods and apparatus for embedding a watermark in a multimedia signal and detecting the watermark, are described. The method comprises the steps of generating a watermark signal comprising a first sequence of values and a second sequence of values; obtaining a first signal portion corresponding to a first channel and a second signal portion corresponding to a second channel from the multimedia signal, said channels being significantly independent; generating a first host modifying signal as a mixture of the first signal portion and the first sequence; generating a second host modifying signal as a mixture of the second signal portion and the second sequence; and generating a watermarked multimedia signal by combining scaled versions of the host modifying signals with the multimedia signal.
摘要翻译： 描述了在多媒体信号中嵌入水印和检测水印的方法和装置。 该方法包括以下步骤：产生水印信号，该水印信号包括第一序列值和第二序列值; 从所述多媒体信号获得对应于第一信道的第一信号部分和对应于第二信道的第二信号部分，所述信道是显着独立的; 产生第一主机修改信号作为第一信号部分和第一序列的混合; 产生第二主机修改信号作为第二信号部分和第二序列的混合; 以及通过将所述主机修改信号的缩放版本与所述多媒体信号组合来生成水印多媒体信号。
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公开(公告)号：US20050273612A1
公开(公告)日：2005-12-08
申请号：US10521848
申请日：2003-06-26
CPC分类号： G10L25/48 , G06T1/0021 , G10L19/018 , G11B20/00884
摘要： Identification of a digital media sequence is performed by an encoding and a decoding process. A sequence is received and its digital fingerprint is computed. A database lookup based on the fingerprint produces one or more matches that all resemble the computed fingerprint to a certain degree. If there is more than one match, at least one attempt is made to detect a watermark in the sequence. If a watermark is found, at least part of the watermark is extracted and used to select one of the matches among the sequences that resemble the media sequence to be identified.
摘要翻译： 通过编码和解码处理来执行数字媒体序列的识别。 接收序列并计算其数字指纹。 基于指纹的数据库查找在一定程度上产生与计算出的指纹完全相似的一个或多个匹配。 如果存在多个匹配，则至少有一次尝试在序列中检测水印。 如果发现水印，则至少部分水印被提取并用于选择类似要识别的媒体序列的序列中的一个匹配。
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公开(公告)号：US20060140440A1
公开(公告)日：2006-06-29
申请号：US10542139
申请日：2004-01-13
IPC分类号： G06K9/00
CPC分类号： H04N19/467 , G10L19/018 , G11B20/00086
摘要： The invention relates to methods, devices, a system of devices and a signal where additional information is embedded in media content. The system includes a device (10) providing additional information (O, D) in a signal (y) having media content, comprising a first mapping unit (14) mapping the amplitude values of the media content onto first new values, and a multiplexing unit (16) inserting the additional information into the mapped media content. The system also includes a device (12) for receiving additional information (O, D) in a signal (y) having media content, comprising a demultiplexing unit (22) arranged to receive a signal including media content (xQ) the amplitude values of which have been mapped onto first new values together with additional embedded information (O, D), and remove the additional information from the mapped media content. The invention allows insertion of watermarks into media content such as audio.
摘要翻译： 本发明涉及方法，设备，设备系统以及其中附加信息被嵌入在媒体内容中的信号。 该系统包括在具有媒体内容的信号（y）中提供附加信息（O，D）的设备（10），包括将媒体内容的幅度值映射到第一新值的第一映射单元（14） 单元（16）将附加信息插入到映射的媒体内容中。 该系统还包括用于在具有媒体内容的信号（y）中接收附加信息（O，D）的设备（12），包括解复用单元（22），其被布置为接收包括媒体内容（x < / SUB>），其幅度值与附加嵌入信息（O，D）一起映射到第一新值上，并从映射的媒体内容中移除附加信息。 本发明允许将水印插入诸如音频的媒体内容中。
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公开(公告)号：US20060140406A1
公开(公告)日：2006-06-29
申请号：US10544203
申请日：2004-01-20
IPC分类号： H04N7/167
CPC分类号： G11B20/10527 , G10L13/033 , G10L19/018 , G10L19/035 , G10L25/69 , G11B20/00007 , G11B20/00086 , G11B20/00891
摘要： A method of processing an information signal comprising: applying a signal modification process to an information signal resulting in a processed signal, said signal modification process being controlled by at least one control parameter; comparing the processed signal with the information signal to determine a measure of perceptual quality of the processed signal; and adjusting said at least one control parameter in response to the determined measure of perceptual quality. The method is advantageously used in watermarking and compression systems, that use a model of the Human Auditory or Visual System to control the watermark embedding depth or the compression ratio, and that often fail to maintain a constant signal quality because they ignore other artifacts than the mask-to-noise ratio.
摘要翻译： 一种处理信息信号的方法，包括：对产生处理信号的信息信号应用信号修改处理，所述信号修改过程由至少一个控制参数控制; 将处理的信号与信息信号进行比较，以确定处理信号的感知质量的度量; 以及响应于所确定的感知质量的度量来调整所述至少一个控制参数。 该方法有利地用于水印和压缩系统，其使用人类听觉或视觉系统的模型来控制水印嵌入深度或压缩比，并且通常不能保持恒定的信号质量，因为它们忽略除了 掩蔽噪声比。
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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：US20050108100A1
公开(公告)日：2005-05-19
申请号：US10500766
申请日：2002-12-09
CPC分类号： H04Q9/00
摘要： System for performing telemetric measurements, comprising a plurality of mobile communication devices (100), each communication device (100) being provided with at least one sensor (110) and a sensor control section (120) for performing measurements, a cellular communication network structure for the mobile communication devices, a server provided with communication means for receiving measurement data from the plurality of mobile communication devices (100), and for sending measurement instructions to respective sensor control sections (120) of the mobile communication devices (100) wherein the sensor control sections (120) are programmable by the server.
摘要翻译： 用于执行遥测测量的系统包括多个移动通信设备（100），每个通信设备（100）设置有至少一个传感器（110）和用于执行测量的传感器控制部分（120），蜂窝通信网络结构 对于移动通信设备，提供有用于从多个移动通信设备（100）接收测量数据并且将测量指令发送到移动通信设备（100）的各个传感器控制部分（120）的通信装置的服务器，其中， 传感器控制部分（120）可由服务器编程。
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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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