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公开(公告)号：US08726029B2
公开(公告)日：2014-05-13
申请号：US12677722
申请日：2008-09-04
申请人： Stefan Katzenbeisser , Wilhelmus P. A. J. Michiels , Paulus M. H. M. A. Gorissen , Aweke N. Lemma , Mehmet U. Celik
发明人： Stefan Katzenbeisser , Wilhelmus P. A. J. Michiels , Paulus M. H. M. A. Gorissen , Aweke N. Lemma , Mehmet U. Celik
CPC分类号： G06F21/10 , G06F2221/0733 , H04L9/002 , H04L9/0618 , H04L2209/16 , H04L2209/608
摘要： A system for cryptographic processing of content comprises an input for receiving the content. A plurality of look-up tables represents a white-box implementation of a combined cryptographic and watermarking operation. The look-up tables represent processing steps of the combined cryptographic and watermarking operation and the look-up tables being arranged for being applied according to a predetermined look-up scheme. The look-up scheme prescribes that an output of a first look-up table of the plurality of look-up tables be used to generate an input of a second look-up table of the plurality of look-up tables. The combined cryptographic and watermarking operation comprises a cryptographic operation and a watermarking operation. A control module looks up values in the plurality of look-up tables in dependence on the received content and in accordance to the look-up scheme, thereby applying the combined cryptographic and watermarking operation to the content.
摘要翻译： 用于内容的密码处理的系统包括用于接收内容的输入。 多个查找表表示组合的加密和水印操作的白盒实现。 查找表表示组合的加密和水印操作的处理步骤，并且查找表被布置为根据预定的查找方案应用。 查找方案规定，使用多个查找表中的第一查找表的输出来生成多个查找表的第二查找表的输入。 组合的加密和水印操作包括密码操作和水印操作。 控制模块根据接收到的内容并根据查找方案查找多个查找表中的值，从而将该组合的加密和水印操作应用于内容。
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公开(公告)号：US20130279741A1
公开(公告)日：2013-10-24
申请号：US13916083
申请日：2013-06-12
CPC分类号： H04N19/467 , G06K9/00744 , G06T1/0028 , G06T1/0085 , G06T2201/0052
摘要： A method of watermarking a video signal includes encoding the video signal using at least one encoding parameter that is time-varied according to a watermarking pattern. The parameter affects information lost while encoding the signal. The parameter may be a quantization factor corresponding to a particular coefficient of an encoding transform. The parameter may be an element of a quantization matrix corresponding to a particular coefficient in a block DCT transform. The method may be implemented in devices with limited processing resources by means of a software update. The method enables the devices to imprint an encoded signal with a robust watermark, which may survive subsequent decompression and recompression. Alternatively, a video signal may be watermarked by modifying a magnitude of a non-dc spatial frequency component in a manner which varies with time according to a watermarking pattern. Corresponding watermark detection methods and watermarking devices also are disclosed.
摘要翻译： 一种对视频信号进行加水印的方法包括使用根据水印模式进行时变的至少一个编码参数对视频信号进行编码。 该参数影响信号丢失的信号。 该参数可以是对应于编码变换的特定系数的量化因子。 该参数可以是与块DCT变换中的特定系数相对应的量化矩阵的元素。 该方法可以通过软件更新在具有有限处理资源的设备中实现。 该方法使得设备能够利用鲁棒水印来印记编码信号，这可以在随后的解压缩和再压缩之后存活。 或者，视频信号可以通过根据水印模式以随时间变化的方式修改非直流空间频率分量的幅度来加水印。 还公开了相应的水印检测方法和水印装置。
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公开(公告)号：US20100046606A1
公开(公告)日：2010-02-25
申请号：US12522873
申请日：2008-01-11
CPC分类号： H04N19/467 , G06K9/00744 , G06T1/0028 , G06T1/0085 , G06T2201/0052
摘要： A method of watermarking a video signal includes encoding the video signal using at least one encoding parameter that is time-varied according to a watermarking pattern. The parameter affects information lost while encoding the signal. The parameter may be a quantization factor corresponding to a particular coefficient of an encoding transform. The parameter may be an element of a quantization matrix corresponding to a particular coefficient in a block DCT transform. The method may be implemented in devices with limited processing resources by means of a software update. The method enables the devices to imprint an encoded signal with a robust watermark, which may survive subsequent decompression and recompression. Alternatively, a video signal may be watermarked by modifying a magnitude of a non-dc spatial frequency component in a manner which varies with time according to a watermarking pattern. Corresponding watermark detection methods and watermarking devices also are disclosed.
摘要翻译： 一种对视频信号进行加水印的方法包括使用根据水印模式进行时变的至少一个编码参数对视频信号进行编码。 该参数影响信号丢失的信号。 该参数可以是对应于编码变换的特定系数的量化因子。 该参数可以是与块DCT变换中的特定系数相对应的量化矩阵的元素。 该方法可以通过软件更新在具有有限处理资源的设备中实现。 该方法使得设备能够利用鲁棒水印来印记编码信号，这可以在随后的解压缩和再压缩之后存活。 或者，视频信号可以通过根据水印模式以随时间变化的方式修改非直流空间频率分量的幅度来加水印。 还公开了相应的水印检测方法和水印装置。
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公开(公告)号：US08467445B2
公开(公告)日：2013-06-18
申请号：US12522873
申请日：2008-01-11
IPC分类号： H04N7/26
CPC分类号： H04N19/467 , G06K9/00744 , G06T1/0028 , G06T1/0085 , G06T2201/0052
摘要： A method of watermarking a video signal includes encoding the video signal using at least one encoding parameter that is time-varied according to a watermarking pattern. The parameter affects information lost while encoding the signal. The parameter may be a quantization factor corresponding to a particular coefficient of an encoding transform. The parameter may be an element of a quantization matrix corresponding to a particular coefficient in a block DCT transform. The method may be implemented in devices with limited processing resources by means of a software update. The method enables the devices to imprint an encoded signal with a robust watermark, which may survive subsequent decompression and recompression. Alternatively, a video signal may be watermarked by modifying a magnitude of a non-dc spatial frequency component in a manner which varies with time according to a watermarking pattern. Corresponding watermark detection methods and watermarking devices also are disclosed.
摘要翻译： 一种对视频信号进行加水印的方法包括使用根据水印模式进行时变的至少一个编码参数对视频信号进行编码。 该参数影响信号丢失的信号。 该参数可以是对应于编码变换的特定系数的量化因子。 该参数可以是与块DCT变换中的特定系数相对应的量化矩阵的元素。 该方法可以通过软件更新在具有有限处理资源的设备中实现。 该方法使得设备能够利用鲁棒水印来印记编码信号，这可以在随后的解压缩和再压缩之后存活。 或者，视频信号可以通过根据水印模式以随时间变化的方式修改非直流空间频率分量的幅度来加水印。 还公开了相应的水印检测方法和水印装置。
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公开(公告)号：US20100296649A1
公开(公告)日：2010-11-25
申请号：US12677722
申请日：2008-09-04
申请人： Stefan Katzenbeisser , Wilhelmus P.A.J. Michiels , Paulus M.H.M.A. Gorissen , Aweke N. Lemma , Mehmet U. Celik
发明人： Stefan Katzenbeisser , Wilhelmus P.A.J. Michiels , Paulus M.H.M.A. Gorissen , Aweke N. Lemma , Mehmet U. Celik
IPC分类号： H04L9/28
CPC分类号： G06F21/10 , G06F2221/0733 , H04L9/002 , H04L9/0618 , H04L2209/16 , H04L2209/608
摘要： A system for cryptographic processing of content comprises an input for receiving the content. A plurality of look-up tables represents a white-box implementation of a combined cryptographic and watermarking operation. The look-up tables represent processing steps of the combined cryptographic and watermarking operation and the look-up tables being arranged for being applied according to a predetermined look-up scheme. The look-up scheme prescribes that an output of a first look-up table of the plurality of look-up tables be used to generate an input of a second look-up table of the plurality of look-up tables. The combined cryptographic and watermarking operation comprises a cryptographic operation and a watermarking operation. A control module looks up values in the plurality of look-up tables in dependence on the received content and in accordance to the look-up scheme, thereby applying the combined cryptographic and watermarking operation to the content.
摘要翻译： 用于内容的密码处理的系统包括用于接收内容的输入。 多个查找表表示组合的加密和水印操作的白盒实现。 查找表表示组合的加密和水印操作的处理步骤，并且查找表被布置为根据预定的查找方案应用。 查找方案规定，使用多个查找表中的第一查找表的输出来生成多个查找表的第二查找表的输入。 组合的加密和水印操作包括密码操作和水印操作。 控制模块根据接收到的内容并根据查找方案查找多个查找表中的值，从而将该组合的加密和水印操作应用于内容。
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