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1.发明申请公开(公告)号：US20070071277A1
公开(公告)日：2007-03-29
申请号：US10557691
申请日：2004-05-24
IPC分类号： G06K9/00
CPC分类号： G11B20/00891 , G10L19/002 , G10L19/0204 , G11B20/00086 , H04N5/913 , H04N9/8042 , H04N2005/91335
摘要： The invention relates to a system for embedding a watermark into an input media signal. A plurality of sub-band signals of a sub-band encoded input signal is obtained; preferably by de-multiplexing of the corresponding bitstream. A set of sub-band signals is filtered by a sub-band filter (507) which has a response associated with the watermark. The sub-band filter (507) thereby generates a set of filtered sub-band signals which are combined into an output signal having the desired watermark. The output signal is preferably a compressed sub-band bitstream signal. A low complexity approach for embedding a watermark into a media signal by filtering in the sub-band domain is thus achieved obviating the requirement for decoding and re-encoding of the media signal.
摘要翻译： 本发明涉及一种将水印嵌入到输入媒体信号中的系统。 获得子带编码输入信号的多个子带信号; 优选地通过对相应位流的解复用。 一组子带信号被具有与水印相关联的响应的子带滤波器（507）滤波。 子带滤波器（507）由此产生一组滤波的子带信号，它们被组合成具有所需水印的输出信号。 输出信号优选地是压缩的子带位流信号。 因此，通过在子带域中的滤波将水印嵌入到媒体信号中的低复杂度方法被消除了对媒体信号的解码和重新编码的要求。
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公开(公告)号：US20060078157A1
公开(公告)日：2006-04-13
申请号：US10542895
申请日：2003-12-16
IPC分类号： G06K9/00
CPC分类号： G06T1/0028 , G06T2201/0083 , G06T2201/0203
摘要： The invention relates to methods, devices and a signal, where an encoder compresses a first piece of information in the form of at least a first limited part of an image, provides perceptible additional information (38) related to the image, and provides the compressed first piece of information (40) in the image (36) and a decoder retrieves the image including the compressed first piece of information in the form of at least a first limited part of the image as well as the perceptible additional information, retrieves the perceptible additional information, and decompresses at least the compressed piece of information essentially without the losses for provision of at least one of image and perceptible additional information essentially without losses. The invention also relates to an image editor, a computer program product and a computer program element for processing additional information (38) such that the original image is restorable.
摘要翻译： 本发明涉及方法，装置和信号，其中编码器以图像的至少第一有限部分的形式压缩第一条信息，提供与图像相关的可感知的附加信息（38），并且提供压缩的 图像（36）中的第一信息（40）和解码器检索包括图像的至少第一有限部分形式的压缩的第一信息的图像以及可感知的附加信息，检索可感知的 附加信息，并至少压缩压缩的信息，基本上没有损失以提供基本上没有损失的图像和可感知的附加信息中的至少一个。 本发明还涉及用于处理附加信息（38）的图像编辑器，计算机程序产品和计算机程序元件，使得原始图像是可恢复的。
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公开(公告)号：US20070064937A1
公开(公告)日：2007-03-22
申请号：US10580503
申请日：2004-11-23
IPC分类号： H04N7/167
CPC分类号： H04N19/59 , H04N19/13 , H04N19/132 , H04N19/14 , H04N19/176 , H04N19/18 , H04N19/40 , H04N19/467 , H04N19/48 , H04N19/93
摘要： The invention relates to a system for re-encoding bitstreams for content signals. A re-encoder (101) receives a bit-stream comprising e.g. an MPEG-2 encoded signal. The receiver (109) feeds the bitstream to an extraction processor (111) which extracts non-essential information from the bitstream thereby generating a reduced bitstream which is still MPEG-2 compliant. The non-essential information, which specifically may be higher frequency transform coefficients, is re-encoded in a re-encode processor (113) using a non-MPEG-2 encoding principle. The encoding may be optimised for the characteristics of the non-essential information resulting in a more efficient encoding. The re-encoded data is inserted in user data section of the reduced bit stream by a combine processor (115). Thus, an effective reduction in the size of the bitstream may be achieved. A decoder (107) may extract the re-encoded data from the user data section, regenerate the original non-essential information and insert this in the reduced bitstream. Specifically, the original bitstream may be regenerated. The approach may specifically be used for reversible bitstream watermarking that which does not increase the size of the bitstream.
摘要翻译： 本发明涉及一种用于重新编码内容信号的比特流的系统。 一个重新编码器（101）接收一个比特流，包括例如 MPEG-2编码信号。 接收器（109）将比特流馈送到提取处理器（111），其从比特流中提取非必要信息，从而生成仍然符合MPEG-2标准的缩减比特流。 可以使用非MPEG-2编码原理，在重新编码处理器（113）中重新编码非特定信息，具体可以是更高的频率变换系数。 可以针对非必要信息的特性优化编码，从而产生更有效的编码。 重新编码的数据通过组合处理器（115）插入到缩减比特流的用户数据部分中。 因此，可以实现比特流的大小的有效减小。 解码器（107）可以从用户数据部分提取重新编码的数据，再生原始非必要信息并将其插入到缩减比特流中。 具体地说，可以再生原始比特流。 该方法可以具体用于不增加比特流大小的可逆比特流水印。
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4.发明申请Raising detectability of additonal data in a media signal having few frequency components 审中-公开提高具有较少频率成分的媒体信号中的附加数据的可检测性公开(公告)号：US20060168448A1
公开(公告)日：2006-07-27
申请号：US10560679
申请日：2004-06-15
CPC分类号： H04N1/32149 , G06T1/005 , G06T2201/0052 , G06T2201/0065 , G10L19/018 , H04N1/3216 , H04N1/32203 , H04N1/32352 , H04N7/08 , H04N2201/327
摘要： The present invention relates to a methods, devices, a media signal as well as an information storage medium related to embedding additional data in a media signal. A first adding unit (12) mixes the media signal (x) with a noise signal (n) in order to provide a modified media signal (x+n), and a combiner unit (14) combines additional data (w) with the modified media signal (x+n) through multiplying the modified media signal with the additional data in order to provide a host modifying media signal (mw). In this way the additional data can be detected with a higher certainty in an output signal (y) if the media signal (x) includes few frequency components.
摘要翻译： 本发明涉及一种方法，设备，媒体信号以及与在媒体信号中嵌入附加数据有关的信息存储介质。 第一加法单元（12）将媒体信号（x）与噪声信号（n）混合，以便提供修改的媒体信号（x + n），并且组合器单元（14）将附加数据（w）与 通过将修改的媒体信号与附加数据相乘来修改媒体信号（x + n），以提供主机修改媒体信号（m≠W）。 以这种方式，如果媒体信号（x）包括很少的频率分量，则在输出信号（y）中可以更高的确定性来检测附加数据。
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公开(公告)号：US20050177738A1
公开(公告)日：2005-08-11
申请号：US10513746
申请日：2003-04-15
CPC分类号： H04N21/8358 , H04N19/467
摘要： Fingerprinting is a technique to identify multimedia signals by extracting robust perceptual features of the signal contents and searching the extracted features in a database where titles, artists, etc. are stored. Watermarking is a technique of embedding payload data in a signal in an unobtrusive manner. The invention combines both techniques. A fingerprint (M(i)) is extracted (1) from a host signal (x) and stored in a database (5). A watermark (w(i)) is embedded (2) in the host signal by modifying (21) the signal, such that the fingerprint (M′(i)) of the modified signal (x′) differs slightly from the original fingerprint. The difference is so small that the database considers them to be similar. At the receiver end, the fingerprint is extracted (3) from the watermarked signal and applied to the database, which responds by returning the original fingerprint of the signal. The embedded watermark is retrieved by subtracting (4) the original fingerprint supplied by the database from the fingerprint extracted from the host signal.
摘要翻译： 指纹是通过提取信号内容的鲁棒感知特征并搜索存储标题，艺术家等的数据库中的提取特征来识别多媒体信号的技术。 水印技术是以不引人注意的方式将有效载荷数据嵌入到信号中。 本发明结合了两种技术。 从主机信号（x）提取指纹（M（i））（1）并存储在数据库（5）中。 通过修改（21）信号将修改信号（x'）的指纹（M'（i））与原始指纹略微不同，将水印（w（i））嵌入（2） 。 差异很小，数据库认为它们是相似的。 在接收端，从水印信号中提取指纹（3），并将其应用于数据库，通过返回信号的原始指纹进行响应。 通过从主机信号提取的指纹中减去（4）由数据库提供的原始指纹来检索嵌入水印。
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公开(公告)号：US20060156002A1
公开(公告)日：2006-07-13
申请号：US10521660
申请日：2003-07-07
申请人： Alphons Antonius Maria Bruekers , Jaap Haitsma , Minne Van Der Veen , Antonius Andrianus Kalker
发明人： Alphons Antonius Maria Bruekers , Jaap Haitsma , Minne Van Der Veen , Antonius Andrianus Kalker
IPC分类号： H04L9/00
CPC分类号： G06T1/005 , G06T2201/0052 , G06T2201/0065
摘要： A watermark detection method is disclosed which is based on computing the cross-correlation between a suspect signal and a watermark. In order to be more robust against prolonged dominant signal components that adversely affect the correlation, the sequence of signal samples (61) to be correlated with the watermark is divided into sub-sequences (A(k)). The sub-sequences are processed, by a weighting function, to obtain modified sub-sequences (B(k)) that individually exhibit the original signal variations, but collectively (62) exhibit a flatter distribution of sample values. Dominant peaks in the signal are thereby substantially reduced.
摘要翻译： 公开了一种基于计算可疑信号和水印之间的互相关的水印检测方法。 为了对于对相关性产生不利影响的长时间的主要信号分量更加鲁棒，与水印相关的信号样本（61）的序列被划分为子序列（A（k））。 通过加权函数对子序列进行处理，以获得单独呈现原始信号变化的修改子序列（B（k）），但是共同地（62）表现出较平坦的样本值分布。 因此，信号中的主要峰值显着降低。
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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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