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公开(公告)号：US20070286450A1
公开(公告)日：2007-12-13
申请号：US10596329
申请日：2004-11-24
申请人： Minne Van Der Veen , Aweke Lemma
发明人： Minne Van Der Veen , Aweke Lemma
IPC分类号： G06K9/00
CPC分类号： G10L19/018
摘要： The invention relates to a system for detecting a watermark using informed detection. A first signal potentially having a watermark embedded is received (601) as is a second signal corresponding to the original signal. The signals are segmented (605) into symbol segments. For each symbol segment a first characteristic is determined (607) for a first section and a second characteristic is determined (609) for a second section in response to the first and second signals in those sections. Specifically, ratios between average envelopes are determined. Thus, the first and second characteristic is indicative of the variations of the envelope during a watermark symbol. A watermark symbol estimate is determined (611) from the first and second characteristic. A sequence of estimated watermark symbols is compared to reference watermark symbols and the presence of a watermark symbol is determined (615) depending on the comparison. The invention is particularly suitable for improved detection of a multiplicative watermark.
摘要翻译： 本发明涉及使用通知检测来检测水印的系统。 接收到可能具有嵌入水印的第一信号（601），就像对应于原始信号的第二信号一样。 信号被分段（605）成符号段。 对于每个符号段，响应于这些部分中的第一和第二信号，确定第一部分的第一特性（607）和第二部分的第二特性（609）。 具体来说，确定平均包络之间的比率。 因此，第一和第二特征指示在水印符号期间的包络的变化。 从第一和第二特征确定水印符号估计（611）。 将估计水印符号的序列与参考水印符号进行比较，并且根据比较确定水印符号的存在（615）。 本发明特别适用于改进的乘法水印的检测。
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公开(公告)号：US20070165850A1
公开(公告)日：2007-07-19
申请号：US10596331
申请日：2004-12-01
申请人： Minne Van Der Veen , Aweke Lemma , Rene Barto , Adriaan Van Leest
发明人： Minne Van Der Veen , Aweke Lemma , Rene Barto , Adriaan Van Leest
IPC分类号： H04N7/167
CPC分类号： H04N19/467
摘要： The present invention relates to a method and device for simplifying distribution of a processed media signal and a method and device for distributing a media signal. A properties determining unit (12, 14) determines a set of signal dependent properties (w,a) of a media signal (x). An embedding unit (16) embeds the signal dependent properties in the media signal in order to provide a modified media signal (x′). An extracting unit (22) retrieves the modified media signal (x′) from a media signal storage (18) and extracts the signal dependent properties (w, a). A signal processing unit (24, 26) then processes the media signal using the signal dependent properties, such that the processed media signal can be provided for distribution to at least one recipient. In this way storage space is saved and the complexity of an electronic content delivery system is reduced.
摘要翻译： 本发明涉及一种用于简化已处理媒体信号的分布的方法和装置以及用于分发媒体信号的方法和装置。 属性确定单元（12,14）确定媒体信号（x）的一组信号相关属性（w，a）。 嵌入单元（16）将信号相关属性嵌入媒体信号中，以便提供修改的媒体信号（x'）。 提取单元（22）从媒体信号存储器（18）检索修改的媒体信号（x'），并提取信号相关属性（w，a）。 然后，信号处理单元（24,26）使用信号相关属性来处理媒体信号，使得处理的媒体信号可以被提供用于分配给至少一个接收者。 以这种方式节省存储空间，减少电子内容传送系统的复杂性。
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公开(公告)号：US20070036357A1
公开(公告)日：2007-02-15
申请号：US10572621
申请日：2004-09-01
IPC分类号： H04N1/44
CPC分类号： H04N1/32149 , G06T1/005 , G06T2201/0065 , G10L19/018 , H04N2201/3236 , H04N2201/328
摘要： The invention concerns a method and apparatus for embedding and detecting watermarks in a digital host signal. In the embedding method a watermark sequence of length Lw/N bits carrying predetermined information is generated and then up-sampled by a factor N (preferably N=2). At intermediate sampling points of the up-sampled sequence a modified version of the watermark sequence (in preferred arrangements the negative thereof) is inserted to form a compound watermark sequence of length Lw. The compound watermark sequence is then combined with the host signal to watermark the host signal. The invention finds particular advantage in that the need for a spectral whitening stage in the detector is done away with.
摘要翻译： 本发明涉及一种在数字主机信号中嵌入和检测水印的方法和装置。 在嵌入方法中，生成承载预定信息的长度为Lw / N比特的水印序列，然后通过因子N（优选N = 2）进行上采样。 在上采样序列的中间采样点，插入水印序列的修改版本（在其优选布置中为负），以形成长度为Lw的复合水印序列。 然后将复合水印序列与主机信号组合以对主机信号进行水印。 本发明的特征在于，在检测器中需要进行光谱增白阶段。
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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：US20050152549A1
公开(公告)日：2005-07-14
申请号：US10509548
申请日：2003-02-26
申请人： Aweke Lemma , Javier Aprea
发明人： Aweke Lemma , Javier Aprea
IPC分类号： G10L19/018 , G10L19/02 , G11B20/00 , H04K1/00
CPC分类号： G11B20/00891 , G10L19/018 , G10L19/02 , G11B20/00086
摘要： A method of generating a watermark signal, embedding the watermark signal within a multimedia signal, and subsequently detecting the watermark signal is described. The watermark signal is the sum of two sequences of values, the second sequence of values being a circularly shifted version of the first sequence.
摘要翻译： 描述了一种产生水印信号，在水印信号内嵌入水印信号，随后检测水印信号的方法。 水印信号是两个值序列的和，第二个序列是第一个序列的循环版本。
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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：US20050240768A1
公开(公告)日：2005-10-27
申请号：US10516156
申请日：2003-05-21
申请人： Aweke Lemma , Javier Aprea
发明人： Aweke Lemma , Javier Aprea
CPC分类号： G11B20/00086 , G06T1/005 , G10L19/018 , G11B20/00884 , G11B20/00891 , H04N1/32149 , H04N1/32315 , H04N2201/324 , H04N2201/327
摘要： Methods and apparatus for processing a multimedia signal comprising a watermark signal are described. The method includes the steps of: removing at least a portion of the watermark signal, and adding a new watermark signal to the multimedia signal so as to form a new watermarked multimedia signal.
摘要翻译： 描述了用于处理包括水印信号的多媒体信号的方法和装置。 该方法包括以下步骤：去除水印信号的至少一部分，并向多媒体信号添加新的水印信号，以形成新的水印多媒体信号。
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9.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：US20070003057A1
公开(公告)日：2007-01-04
申请号：US10596931
申请日：2005-01-13
申请人： Aweke Lemma , Minne Van Der Veen
发明人： Aweke Lemma , Minne Van Der Veen
CPC分类号： G10L19/018 , G11B20/00891
摘要： The invention concerns a method of bit stream watermarking in a tandem coding system (300). The method involves arranging for the system (300) to comprise a series of stages including a first quantizing unit for processing an input signal to generate a first intermediate signal, a combining unit for embedding a watermarking signal into the intermediate signal to generate a second intermediate signal, and a second quantizing unit for processing the second intermediate signal to generate a watermarked output signal. The first quantizing unit to arranged to include a unit for predicting distortions arising in subsequent stages of the system (300) and generating one or more corresponding quantization noise reduction parameters. Moreover, the system (300) is operable to apply the one or more reduction parameters in at least one of the subsequent stages for reducing noise and/or distortion arising within the system (300).
摘要翻译： 本发明涉及串联编码系统（300）中的位流水印方法。 该方法包括安排系统（300）包括一系列级，包括用于处理输入信号以产生第一中间信号的第一量化单元，用于将水印信号嵌入到中间信号中以产生第二中间信号的组合单元 信号和第二量化单元，用于处理第二中间信号以产生加水印的输出信号。 第一量化单元被布置成包括用于预测在系统的后续阶段（300）中出现的失真的单元，并且生成一个或多个对应的量化噪声降低参数。 此外，系统（300）可操作以将至少一个后续级中的一个或多个减少参数应用于用于减少在系统（300）内产生的噪声和/或失真。
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