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    • 2. 发明申请
    • METHOD AND SYSTEM FOR TEMPORAL SYNCHRONIZATION
    • 用于时间同步的方法和系统
    • WO2008010836A1
    • 2008-01-24
    • PCT/US2006/046815
    • 2006-12-08
    • THOMSON LICENSINGTIAN, JunBLOOM, Jeffrey, Adam
    • TIAN, JunBLOOM, Jeffrey, Adam
    • G06T1/00
    • G06T1/005G06T2201/0065
    • Embodiments of the present invention provide a method, apparatus and system for temporal synchronization of digital content based on a marker symbol and a marker code. A marker symbol is inserted at an identifiable location of a payload (e.g., the beginning and/or end of a payload) at regular intervals in the digital content and the payload is marker coded to form a periodic sequence. The payload is marker coded such that the maker symbol is not repeated by the coded payload. The periodic sequence is then embedded into digital content. A decoder is able to re-synchronize the payload by determining the location of the marker symbol. As such, a method, apparatus and system is provided for robust temporal synchronization for, for example, content encoding and decoding for applications such as audio and video watermarking and the like.
    • 本发明的实施例提供了一种基于标记符号和标记码的数字内容的时间同步的方法,装置和系统。 在数字内容中以规则的间隔将标记符号插入有效载荷的可识别位置(例如,有效负载的开始和/或结束),并且有效载荷被标记编码以形成周期性序列。 有效载荷是标记编码的,使得制造商符号不被编码的有效载荷重复。 然后将周期序列嵌入到数字内容中。 解码器能够通过确定标记符号的位置来重新同步有效载荷。 因此,提供了用于例如用于诸如音频和视频水印等应用的内容编码和解码的鲁棒时域同步的方法,装置和系统。
    • 3. 发明申请
    • SELECTION OF WATERMARKS FOR THE WATERMARKING OF COMPRESSED VIDEO
    • 选择压缩视频水印的水印
    • WO2010021694A1
    • 2010-02-25
    • PCT/US2009/004706
    • 2009-08-18
    • THOMSON LICENSINGZOU, DekunBLOOM, Jeffrey, AdamHE, Shan
    • ZOU, DekunBLOOM, Jeffrey, AdamHE, Shan
    • H04N7/26G06T1/00H04N7/34
    • 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化,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。
    • 4. 发明申请
    • METHOD FOR CONSTRUCTING INNER CODES FOR ANTI-COLLUSION FORENSIC CODE FOR WATERMARKING DIGITAL CONTENT
    • 用于构建用于水印数字内容的反汇编代码的内部编码方法
    • WO2010036225A1
    • 2010-04-01
    • PCT/US2008/011210
    • 2008-09-26
    • THOMSON LICENSINGLIN, Wan-YiHE, ShanBLOOM, Jeffrey, Adam
    • LIN, Wan-YiHE, ShanBLOOM, Jeffrey, Adam
    • G06T1/00
    • G06T1/005G06T2201/0051G06T2201/0063
    • A method and apparatus are described including generating a unique code for each of a plurality of users using a plurality of symbols, generating a plurality of codes representing the plurality of symbols, substituting the plurality of codes into the unique code for each of the plurality of users, permuting the code resulting from the substitution to produce a codeword for each of the plurality of users and embedding the codeword into digital content. The second generating act further includes generating a string of first symbols followed by second symbols, wherein the first symbols are all ones and the second symbols are all negative ones, wherein a number of first symbols is equal to a number of the second symbols, and wherein if a length of the first symbols followed by the second symbols is less than a length of the code, then the first symbols followed by the second symbols are repeated until the code length is filled.
    • 描述了一种方法和装置,包括使用多个符号为多个用户中的每一个生成唯一的代码,生成表示多个符号的多个代码,将多个代码替换为多个代码中的每一个的唯一代码 用户,将由替换产生的代码置换为多个用户中的每一个用户产生码字,并将码字嵌入到数字内容中。 第二生成动作还包括生成一串第一符号,后跟第二符号,其中第一符号全为1,第二符号全为负数,其中多个第一符号等于第二符号的数目,以及 其中如果所述第二符号之后的所述第一符号的长度小于所述代码的长度,则重复所述第二符号后面的所述第一符号直到所述代码长度被填充。
    • 5. 发明申请
    • MODIFYING A CODED BITSTREAM
    • 修改编码的BITSTREAM
    • WO2008118146A1
    • 2008-10-02
    • PCT/US2007/023173
    • 2007-11-02
    • THOMSON LICENSINGZOU, DekunBLOOM, Jeffrey, AdamYIN, PengDIVORRA ESCODA, Oscar
    • ZOU, DekunBLOOM, Jeffrey, AdamYIN, PengDIVORRA ESCODA, Oscar
    • G06T1/00
    • G06T1/0035G06T2201/0053H04N19/13H04N19/467H04N19/48H04N19/70
    • Implementations may relate to various aspects of modifying, or using, a coded bitstream, or to recovering watermarking 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的各个方面,或者从数据恢复水印信息。 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恢复水印信息。
    • 7. 发明申请
    • MODIFYING A CODED BITSTREAM
    • 修改编码的BITSTREAM
    • WO2008154041A1
    • 2008-12-18
    • PCT/US2008/007441
    • 2008-06-13
    • THOMSON LICENSINGBLOOM, Jeffrey, AdamZOU, Dekun
    • BLOOM, Jeffrey, AdamZOU, Dekun
    • G06T1/00
    • 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 (810) 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 (830) 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(810)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(830)不同于特定值的替代值,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。
    • 9. 发明申请
    • CABAC/AVC COMPLIANT WATERMARKING OF SYNTAX ELEMENTS IN COMPRESSED VIDEO
    • CABAC / AVC在压缩视频中符合性语音元素的水印
    • WO2010021682A1
    • 2010-02-25
    • PCT/US2009/004689
    • 2009-08-17
    • THOMSON LICENSINGZOU, DekunBLOOM, Jeffrey, AdamHE, Shan
    • ZOU, DekunBLOOM, Jeffrey, AdamHE, Shan
    • H04N7/26H04N7/50G06T1/00
    • 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来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。