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    • 2. 发明申请
    • SELECTION OF WATERMARKS FOR THE WATERMARKING OF COMPRESSED VIDEO
    • 选择水印的压缩视频
    • US20110158465A1
    • 2011-06-30
    • US12737829
    • 2009-08-18
    • Dekun ZouJeffrey Adam BloomShan He
    • Dekun ZouJeffrey Adam BloomShan He
    • H04N7/26G06K9/00
    • H04N19/00763G06T1/0028G06T2201/0051G06T2201/0053G06T2201/0061G06T2201/0202H04N19/154H04N19/467H04N19/593
    • A method comprises accessing changes which can be watermarks in a list for coded data, the changes having an syntax element, an original value and an candidate alternative value; determining for a subset a group of compliant changes from the changes, the complaint changes being compliant with a coding protocol such as a CABAC encoding protocol; and selecting for the subset only compliant changes that result in the subset having only one candidate alternative value for each syntax elements and result in only compliant changes also meeting at least one performance criterion. The method can include determining fidelity, recoverability, or robustness of the watermarks and removing or preventing watermarks from being in the subset based on the fidelity, recoverability, or robustness, wherein fidelity, recoverability, and robustness are performance criteria. The method can include determining at least two performance values for the watermarks, determining some collective metric of the at least two performance values, and removing or preventing watermarks from being in the subset based on the same collective metric.
    • 一种方法包括访问可以是用于编码数据的列表中的水印的改变,所述改变具有语法元素,原始值和候选替代值; 根据变化确定子集一组合规变更,投诉变化符合诸如CABAC编码协议之类的编码协议; 以及仅为所述子集选择合规变更,所述变化导致所述子集对于每个语法元素仅具有一个候选替代值,并且仅导致符合变化也符合至少一个性能标准。 该方法可以包括确定水印的保真度,可恢复性或鲁棒性,并且基于保真度,可恢复性或鲁棒性去除或防止水印在子集中,其中保真度,可恢复性和鲁棒性是性能标准。 该方法可以包括确定水印的至少两个性能值,确定至少两个性能值的一些集合度量,以及基于相同的集合度量去除或防止水印在该子集中。
    • 3. 发明申请
    • MODIFYING A CODED BITSTREAM
    • 修改编码的BITSTREAM
    • US20100027684A1
    • 2010-02-04
    • US12450200
    • 2007-11-02
    • Dekun ZouJeffrey Adam BloomPeng YinOscar Divorra Escoda
    • Dekun ZouJeffrey Adam BloomPeng YinOscar Divorra Escoda
    • H04B1/66G06K9/00
    • G06T1/0035G06T2201/0053H04N19/13H04N19/467H04N19/48H04N19/70
    • Implementations may relate to various aspects of modifying, or using, a coded bitstream, or to recovering water-marking information from data. In one implementation, a coded bitstream is modified to allow for the application of a watermark to the coded bitstream without changing the coding of any other syntax elements in the bitstream. This is performed by identifying conditions necessary to change a coded syntax element without disrupting the interpretation of subsequent coded elements. The coded syntax element is replaced with another coded value if the modified value generates the same decoding variables as the original value would have generated. Particular implementations focus on syntax elements coded using entropy coding, including, for example, Context-based Adaptive Binary Arithmetic Coding (CABAC). Regardless of the type of coding or watermarking, various implementations may provide for recovering watermarking information. Particular implementations recover watermarking information using detection data and feature information.
    • 实现可以涉及修改或使用编码比特流或从数据中恢复水印信息的各个方面。 在一个实现中,编码比特流被修改为允许将水印应用于编码比特流,而不改变比特流中任何其他语法元素的编码。 这是通过识别改变编码语法元素所必需的条件而不中断后续编码元素的解释来执行的。 如果修改后的值产生与原始值相同的解码变量,则将编码语法元素替换为其他编码值。 特定实现集中于使用熵编码编码的语法元素,包括例如基于上下文的自适应二进制算术编码(CABAC)。 不管编码或水印的类型如何,各种实现可以提供恢复水印信息。 具体实现使用检测数据和特征信息来恢复水印信息。
    • 5. 发明授权
    • Watermark detection using a propagation map
    • 使用传播图的水印检测
    • US09105091B2
    • 2015-08-11
    • US13577619
    • 2011-02-07
    • Shan HeDekun ZouJeffrey Adam Bloom
    • Shan HeDekun ZouJeffrey Adam Bloom
    • G06T1/00H04N21/8358H04N21/845
    • G06T1/0064H04N21/8358H04N21/8455
    • A method for detecting and selecting watermarking in video coding is provided that comprises accessing a list of possible watermarks; generating propagation maps of modifications to the video that would be caused by applying the respective watermarks; generating a detection region responsive to each respective propagation map that includes blocks within the propagation map that collectively rank highest with respect to a selected detection criteria compared to each other region within the propagation map; selecting a threshold metric for evaluating detection regions; and removing watermarks from the list responsive to a comparison of their detection regions with the threshold metric.
    • 提供了一种用于在视频编码中检测和选择水印的方法,包括访问可能水印的列表; 生成将通过应用各个水印引起的对视频的修改的传播图; 响应于每个相应的传播图生成检测区域,所述检测区域包括传播图中的块,其相对于所述传播图中的每个其他区域相对于所选择的检测标准统一地排列最高; 选择用于评估检测区域的阈值度量; 以及响应于它们的检测区域与阈值度量的比较,从列表中去除水印。
    • 7. 发明授权
    • Modifying a coded bitstream
    • 修改编码比特流
    • US08588459B2
    • 2013-11-19
    • US12451551
    • 2008-06-13
    • Jeffrey Adam BloomDekun Zou
    • Jeffrey Adam BloomDekun Zou
    • G06K9/00
    • G06T1/0035G06T2201/0053H04N19/13H04N19/467H04N19/48H04N19/61H04N19/85H04N19/93H04N21/23892H04N21/8358
    • Various implementations are provided for, for example, determining watermarking data, performing the watermarking, and processing watermarked data. At least one implementation watermarks AVC bitstream that uses CAVLC entropy coding. The watermarking data may be determined in a pre-processing stage and stored for later use in watermark a bitstream. One method accesses variable-length encoded data including an encoding of information identifying an actual reference used to predictively encode an image. The encoding of the information has a particular value. The method determines an alternative value that is different from the particular value, such that the alternative value is an encoding of alternative information that identifies a different reference from the actual reference. The alternative value is for use in watermarking the variable-length encoded data.
    • 提供了各种实施例,例如,确定水印数据,执行水印和处理水印数据。 至少一个实现水印使用CAVLC熵编码的AVC比特流。 可以在预处理阶段中确定水印数据,并将其存储以供稍后在水印中使用比特流。 一种方法访问可变长度编码数据,包括识别用于预测编码图像的实际参考的信息的编码。 信息的编码具有特定的价值。 该方法确定与特定值不同的替代值,使得替代值是识别与实际参考的不同参考的替代信息的编码。 替代值用于对可变长度编码数据进行水印处理。
    • 8. 发明授权
    • Changeable block list
    • 可更改块列表
    • US09113231B2
    • 2015-08-18
    • US12737822
    • 2009-08-17
    • Dekun ZouJeffrey Adam BloomShan He
    • Dekun ZouJeffrey Adam BloomShan He
    • H04N9/80H04N21/8358G06T1/00H04N21/2389H04N19/13H04N19/61H04N19/48H04N19/467H04N19/517
    • H04N21/8358G06T1/0035H04N19/13H04N19/467H04N19/48H04N19/517H04N19/61H04N21/23892
    • A method comprises accessing encoded video data; accessing a list of watermarks to the encoded video data; determining syntax elements for current blocks of video data and syntax elements of currents blocks with the watermarks; removing watermarks that cause visible artifacts based on differences in the syntax elements between the current blocks and current blocks with watermarks, thereby creating filtered list of acceptable watermarks. The method can further include determining coding variable ranges for the current block and current block with watermarks from the list; comparing the coding variable ranges for the current blocks and current blocks with watermarks from the list; and filtering out watermarks that yield coding variable ranges outside the coding variable ranges of the current blocks. Additionally, the method can include determining bit lengths of the current blocks and current blocks with watermarks from the list; comparing bit lengths of the current blocks and current blocks with watermarks from the list; and filtering out watermarks that yield bit lengths not equal to the bit lengths of the current blocks.
    • 一种方法包括访问编码视频数据; 访问水印列表到编码视频数据; 确定视频数据的当前块和具有水印的电流块的语法元素的语法元素; 基于当前块和具有水印的当前块之间的语法元素的差异来去除导致可见伪像的水印,从而创建可接受水印的过滤列表。 该方法还可以包括使用来自列表的水印确定当前块和当前块的编码变量范围; 将来自列表的水印的当前块和当前块的编码变量范围进行比较; 并且滤出在当前块的编码变量范围之外产生编码变量范围的水印。 此外,该方法可以包括使用来自列表的水印确定当前块和当前块的比特长度; 将当前块和当前块的比特长度与来自列表的水印进行比较; 并且滤出产生不等于当前块的比特长度的比特长度的水印。