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公开(公告)号:US08452971B2
公开(公告)日:2013-05-28
申请号:US13188813
申请日:2011-07-22
IPC分类号: H04L9/32
CPC分类号: G06T1/0085 , G06T1/0064 , G06T2201/0051 , H04N19/467
摘要: A video watermarking scheme is disclosed, which is designed for the digital cinema format, as it will be used on large projector screens in theaters. The watermark is designed in such a way that it has minimal impact on the video quality, but is still detectable after capture with a handheld camera and conversion to, for instance, VHS, CD-Video or DVD format. The proposed watermarking system only exploits the temporal axis. This makes it invulnerable to geometrical distortions generally caused by such a way of capturing. The watermark is embedded by modulating a global property of the frames (e.g. the mean luminance) in accordance with the samples of the watermark. The embedding depth is preferably locally adapted within each frame to local statistics of the respective image. Watermark detection is performed by correlating the watermark sequence with extracted mean luminance values of a sequence of frames.
摘要翻译: 公开了一种视频水印方案,其被设计用于数字电影格式,因为它将被用于剧院的大型投影仪屏幕上。 水印的设计方式使其对视频质量的影响最小,但在使用手持相机拍摄并转换为例如VHS,CD-Video或DVD格式后,仍然可以检测到水印。 所提出的水印系统仅利用时间轴。 这使得它几何失真通常是由这种捕获方式造成的。 通过根据水印的样本调制帧的全局属性(例如平均亮度)来嵌入水印。 嵌入深度优选地在每个帧内局部地适应于相应图像的局部统计。 通过将水印序列与帧序列的提取的平均亮度值相关联来执行水印检测。
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公开(公告)号:US07921296B2
公开(公告)日:2011-04-05
申请号:US11800904
申请日:2007-05-07
申请人: Jaap Andre Haitsma , Antonius Adrianus Cornelis Maria Kalker , Constant Paul Marie Jozef Baggen , Job Cornelis Oostveen
发明人: Jaap Andre Haitsma , Antonius Adrianus Cornelis Maria Kalker , Constant Paul Marie Jozef Baggen , Job Cornelis Oostveen
IPC分类号: H04L9/00
CPC分类号: H04H60/37 , G06F17/30743 , G06F17/30787 , G06F17/30802 , G06K9/00744 , G06T1/0028 , G06T1/005 , G06T2201/0051 , G06T2201/0061 , G06T2201/0065 , G10H1/0058 , G10H2210/295 , G10H2240/061 , H03M7/30 , H04H60/56 , H04H2201/90 , H04N19/467
摘要: Hashes are short summaries or signatures of data files which can be used to identify the file. The disclosed method generates robust hashes for multimedia content, for example, audio clips. The audio clip is divided into successive (preferably overlapping) frames. For each frame, the frequency spectrum is divided into bands. A robust property of each band (e.g. energy) is computed and represented by a respective hash bit. An audio clip is thus represented by a concatenation of binary hash words, one for each frame. To identify a possibly compressed audio signal, a block of hash words derived therefrom is matched by a computer with a large database. Such matching strategies are also disclosed. In an advantageous embodiment, the extraction process also provides information as to which of the hash bits are the least reliable. Flipping these bits considerably improves the speed and performance of the matching process.
摘要翻译: 哈希是数据文件的简短摘要或签名,可用于标识文件。 所公开的方法为多媒体内容(例如,音频剪辑)生成鲁棒散列。 音频剪辑被分成连续的(优选重叠的)帧。 对于每个帧,频谱被分为频带。 计算每个频带(例如能量)的鲁棒属性,并由相应的散列位表示。 因此,音频剪辑由二进制散列字的连接表示,每个帧一个。 为了识别可能压缩的音频信号,从其导出的散列字块由具有大数据库的计算机匹配。 还披露了这种匹配策略。 在有利的实施例中,提取过程还提供关于哪个散列位是最不可靠的信息。 翻转这些位可显着提高匹配过程的速度和性能。
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公开(公告)号:US20090324199A1
公开(公告)日:2009-12-31
申请号:US12305057
申请日:2007-06-14
申请人: Jaap Andre Haitsma , Vikas Bhargava
发明人: Jaap Andre Haitsma , Vikas Bhargava
IPC分类号: H04N5/91
CPC分类号: H04H60/59 , G06K9/00744 , H04H60/37 , H04H2201/90
摘要: The present invention provides novel techniques for generating more robust fingerprints (1) of video signals (2). Certain embodiments of the invention derive video fingerprints only from blocks (21) in a central portion (22) of each frame (20), ignoring a remaining outer portion (23), the resultant fingerprints (1) being more robust with respect to transformations comprising cropping or shifts. Other embodiments divide each frame (or a central portion of it) into non-rectangular blocks, such as pie-shaped or annular blocks, and generate fingerprints from these blocks. The shape of the blocks can be selected to provide robustness against particular transformations. Pie blocks provide robustness to scaling, and annular blocks provide robustness to rotations, for example. Other embodiments use blocks of different sizes, so that different portions of the frame may be given different weighting in the fingerprint.
摘要翻译: 本发明提供了用于产生视频信号(2)的更强健的指纹(1)的新颖技术。 本发明的某些实施例仅从每个帧(20)的中心部分(22)中的块(21)导出视频指纹,忽略剩余外部部分(23),所得到的指纹(1)相对于转换更加鲁棒 包括种植或转移。 其他实施例将每个框架(或其中心部分)划分成非矩形块,例如饼形或环形块,并从这些块生成指纹。 可以选择块的形状以提供针对特定变换的鲁棒性。 馅饼块提供了坚固的结垢,例如,环形块提供了旋转的鲁棒性。 其他实施例使用不同大小的块,使得可以在指纹中给予帧的不同部分不同的加权。
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公开(公告)号:US07549052B2
公开(公告)日:2009-06-16
申请号:US10073772
申请日:2002-02-11
申请人: Jaap Andre Haitsma , Antonius Adrianus Cornelis Maria Kalker , Constant Paul Marie Jozef Baggen , Job Cornelis Oostveen
发明人: Jaap Andre Haitsma , Antonius Adrianus Cornelis Maria Kalker , Constant Paul Marie Jozef Baggen , Job Cornelis Oostveen
IPC分类号: H04L9/00
CPC分类号: H04H60/37 , G06F17/30743 , G06F17/30787 , G06F17/30802 , G06K9/00744 , G06T1/0028 , G06T1/005 , G06T2201/0051 , G06T2201/0061 , G06T2201/0065 , G10H1/0058 , G10H2210/295 , G10H2240/061 , H03M7/30 , H04H60/56 , H04H2201/90 , H04N19/467
摘要: Hashes are short summaries or signatures of data files which can be used to identify the file. Hashing multimedia content (audio, video, images) is difficult because the hash of original content and processed (e.g. compressed) content may differ significantly.The disclosed method generates robust hashes for multimedia content, for example, audio clips. The audio clip is divided (12) into successive (preferably overlapping) frames. For each frame, the frequency spectrum is divided (15) into bands. A robust property of each band (e.g. energy) is computed (16) and represented (17) by a respective hash bit. An audio clip is thus represented by a concatenation of binary hash words, one for each frame. To identify a possibly compressed audio signal, a block of hash words derived therefrom is matched by a computer (20) with a large database (21). Such matching strategies are also disclosed. In an advantageous embodiment, the extraction process also provides information (19) as to which of the hash bits are the least reliable. Flipping these bits considerably improves the speed and performance of the matching process.
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公开(公告)号:US07477739B2
公开(公告)日:2009-01-13
申请号:US10503245
申请日:2003-01-21
IPC分类号: H04L9/00
CPC分类号: G06F17/30758 , G06F17/3002 , G06F17/30026 , G06F17/30743
摘要: A robust fingerprinting system is disclosed. Such a system can recognize unknown multimedia content (U(t)) by extracting a fingerprint (a series of hash words) from said content, and searching a resembling fingerprint in a database in which fingerprints of a plurality of known contents (K(t)) are stored. In order to more efficiently store the fingerprints in the database and to speed up the search, the hash words (H(n)) of known signals (K(t)) are sub-sampled (13) by a factor M prior to storage in the database (14). The hash words (H(n)) of unknown signals (U(t)) are divided (16) into M interleaved sub-series (H0(n) . . . HM−1(n)). The interleaved sub-series are selectively (17) applied to the database (14) under the control of a computer (15). If only one of the sub-series sufficiently matches a stored fingerprint, the signal is identified.
摘要翻译: 公开了一种健壮的指纹系统。 这样的系统可以通过从所述内容提取指纹(一系列散列字)来识别未知的多媒体内容(U(t)),并且在数据库中搜索类似的指纹,其中多个已知内容的指纹(K(t ))。 为了更有效地将指纹存储在数据库中并加速搜索,已知信号(K(t))的散列字(H(n))在存储之前以因子M被子采样(13) 在数据库(14)中。 将未知信号(U(t))的散列字(H(n))(16)分割成M个交错子序列(H0(n)... HM-1(n))。 在计算机(15)的控制下,交替子系列被选择性地(17)应用于数据库(14)。 如果子系列中只有一个与存储的指纹充分匹配,则识别该信号。
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公开(公告)号:US07152161B2
公开(公告)日:2006-12-19
申请号:US10139182
申请日:2002-05-06
申请人: Alphons Antonius Maria Lambertus Bruekers , Jaap Andre Haitsma , Antonius Adrianus Cornelis Maria Kalker , Minne Van Der Veen
发明人: Alphons Antonius Maria Lambertus Bruekers , Jaap Andre Haitsma , Antonius Adrianus Cornelis Maria Kalker , Minne Van Der Veen
CPC分类号: H04H20/31 , G06T1/0064 , G10L19/018 , G11B20/00086 , G11B20/00891
摘要: methods of embedding and detecting a watermark in an information signal (x(n), y′(n)) which are robust against sampling rate conversions of the watermarked signal (y(n)) adapts frame lengths used by an embedder and the detector, respectively, so as to preserve a constant ratio between the respective sampling rate and frame length. The frame lengths may be calculated from a greatest common divisor of a set of sampling rates providing watermarks which are robust against sampling rate conversions between any sampling rates of the set of sampling rates.
摘要翻译: 在对水印信号(y(n))的采样率转换鲁棒的信息信号(x(n),y'(n))中嵌入和检测水印的方法适应嵌入器和检测器使用的帧长度 ,以便保持相应采样率和帧长度之间的恒定比率。 帧长度可以从提供水印的一组采样率的最大公因数来计算,该水印对采样率集合的任何采样率之间的采样率转换是鲁棒的。
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公开(公告)号:US07996678B2
公开(公告)日:2011-08-09
申请号:US10480339
申请日:2002-06-18
IPC分类号: H04L9/00
CPC分类号: G06T1/0085 , G06T1/0064 , G06T2201/0051 , H04N19/467
摘要: A video watermarking scheme is disclosed, which is designed for the digital cinema format, as it will be used on large projector screens in theaters. The watermark is designed in such a way that it has minimal impact on the video quality, but is still detectable after capture with a handheld camera and conversion to, for instance, VHS, CD-Video or DVD format. The proposed watermarking system only exploits the temporal axis. This makes it invulnerable to geometrical distortions generally caused by such a way of capturing. The watermark is embedded by modulating a global property of the frames (e.g. the mean luminance) in accordance with the samples of the watermark. The embedding depth is preferably locally adapted within each frame to local statistics of the respective image. Watermark detection is performed by correlating the watermark sequence with extracted mean luminance values of a sequence of frames.
摘要翻译: 公开了一种视频水印方案,其被设计用于数字电影格式,因为它将被用于剧院的大型投影仪屏幕上。 水印的设计方式使其对视频质量的影响最小,但在使用手持相机拍摄并转换为例如VHS,CD-Video或DVD格式后,仍然可以检测到水印。 所提出的水印系统仅利用时间轴。 这使得它几何失真通常是由这种捕获方式造成的。 通过根据水印的样本调制帧的全局属性(例如平均亮度)来嵌入水印。 嵌入深度优选地在每个帧内局部地适应于相应图像的局部统计。 通过将水印序列与帧序列的提取的平均亮度值相关联来执行水印检测。
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公开(公告)号:US20100225826A1
公开(公告)日:2010-09-09
申请号:US12293618
申请日:2007-03-20
CPC分类号: H04N21/2541 , G06F21/10 , H04N21/23892 , H04N21/44008 , H04N21/44236 , H04N21/835 , H04N21/8358
摘要: A method of identifying from a plurality of receivers a receiver which causes a redistribution of content, the method comprising making available a watermarked version of the content to only a subset of the plurality of receivers, determining if the watermarked version is subsequently being distributed, and eliminating one or more receivers from the plurality based on the determination, until the subset comprises only the receiver which causes the redistribution, thereby identifying this receiver. Preferably a binary search algorithm is used. Also a system for distributing content to a plurality of receivers, configured to execute the method.
摘要翻译: 一种从多个接收机中识别导致内容再分配的接收机的方法,所述方法包括使内容的水印版本仅适用于所述多个接收机的子集,确定所述水印版本是否随后被分发,以及 基于确定消除来自多个的一个或多个接收器,直到子集仅包括导致再分配的接收器,从而识别该接收器。 优选使用二进制搜索算法。 还有一种用于将内容分发给多个接收器的系统,被配置为执行该方法。
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公开(公告)号:US07286451B2
公开(公告)日:2007-10-23
申请号:US10521134
申请日:2003-06-23
申请人: Gijsbrecht Carel Wirtz , Antonius Adrianus Cornelis Maria Kalker , Antonius Adriaan Maria Staring , Jaap Andre Haitsma , Johan Paul Marie Gerald Linnartz
发明人: Gijsbrecht Carel Wirtz , Antonius Adrianus Cornelis Maria Kalker , Antonius Adriaan Maria Staring , Jaap Andre Haitsma , Johan Paul Marie Gerald Linnartz
IPC分类号: G11B7/00
CPC分类号: G11B20/0076 , G11B20/00086 , G11B20/00123
摘要: A digital media recorder and a method of controlling such are provided. During attempts to copy media content, sub-sequences are extracted from an input media sequence. A digital fingerprint of the sub-sequence is calculated and compared with at least one first reference fingerprint from a database. The outcome of the comparison determines the action to take in the further processing. Recording of the input media sequence on a media carrier is either allowed or obstructed, e.g. disallowed. In the case recording of the sequence is allowed, the database is updated with information that the digital media sequence has been recorded.
摘要翻译: 提供数字媒体记录器及其控制方法。 在尝试复制媒体内容期间,从输入媒体序列中提取子序列。 计算子序列的数字指纹,并将其与来自数据库的至少一个第一参考指纹进行比较。 比较的结果决定了进一步处理中采取的行动。 媒体载体上的输入媒体序列的记录被允许或阻止,例如 不允许 在允许记录序列的情况下,利用已经记录了数字媒体序列的信息更新数据库。
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公开(公告)号:US06714658B2
公开(公告)日:2004-03-30
申请号:US10409436
申请日:2003-04-08
IPC分类号: H04K100
CPC分类号: G06T1/0071 , G06T1/005 , G06T2201/0065
摘要: Data is hidden in an information signal by encoding payload in to relative positions and/or polarities of multiple (possibly equal) embedded watermarks. The payload is retrieved by computing the correlation between the watermark(s) and the signal as a function of the position. The distance between peaks of the correlation function represents the payload. In order to precisely detect said distance, even if the peaks are smeared, the correlation function in a window (w1) around one peak (p1) is compared with the correlation function in a similar window (w2) around another peak (p2). This is done for different positions of said windows. The distance (k) between the windows (37,38) for which the correlation functions most resemble each other is the distance representing the payload.
摘要翻译: 通过将有效载荷编码到多个(可能相等)嵌入水印的相对位置和/或极性,将数据隐藏在信息信号中。 通过计算水印和信号之间的相关性作为位置的函数来检索有效载荷。 相关函数的峰值之间的距离表示有效载荷。 为了精确地检测所述距离,即使灰度被抹去,在一个峰值(p1)周围的窗口(w1)中的相关函数与围绕另一个峰值(p2)的类似窗口(w2)中的相关函数进行比较。 这是对所述窗口的不同位置完成的。 相关函数最相似的窗口(37,38)之间的距离(k)是表示有效载荷的距离。
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