公开(公告)号：US06175627B1

公开(公告)日：2001-01-16

申请号：US08974920

申请日：1997-11-20

申请人： Rade Petrovic ,  Kanaan Jemili ,  Joseph M. Winograd ,  Eric Metois

发明人： Rade Petrovic ,  Kanaan Jemili ,  Joseph M. Winograd ,  Eric Metois

IPC分类号： H04N7087

CPC分类号： H04H20/31 ,  G06T1/0028

摘要： Apparatus and methods are provided for embedding or embedding digital data into an analog host or cover signal. A distributed signal feature of the cover signal in a particular domain (time, frequency or space) is calculated and compared with a set of predefined quantization values corresponding to an information symbol to be encoded. The amount of change required to modify the signal feature to the determined target quantization value is calculated and the cover signal is modified accordingly to so change the feature value over a predefined interval. Information symbols are extracted by the opposite process.

摘要翻译： 提供了用于将数字数据嵌入或嵌入到模拟主机或覆盖信号中的装置和方法。 计算特定域（时间，频率或空间）中的覆盖信号的分布式信号特征，并将其与对应于要编码的信息符号的一组预定义量化值进行比较。 计算将信号特征修改为所确定的目标量化值所需的改变量，并相应地修改覆盖信号，从而在预定义的间隔上改变特征值。 信息符号由相反的过程提取。

公开(公告)号：US09323902B2

公开(公告)日：2016-04-26

申请号：US13324421

申请日：2011-12-13

申请人： Rade Petrovic ,  Jian Zhao ,  Joseph M. Winograd

发明人： Rade Petrovic ,  Jian Zhao ,  Joseph M. Winograd

IPC分类号： H04L9/32 ,  G06F21/10 ,  H04N1/00 ,  H04N1/32

CPC分类号： G06F21/10 ,  G06F2221/0733 ,  H04L2209/608 ,  H04N1/00846 ,  H04N1/00854 ,  H04N1/00875 ,  H04N1/32154 ,  H04N1/32203

摘要： Methods, devices and computer program products facilitate conditional access to a content embedded with watermarks. For such a content, when copy control rules associated with an embedded watermark message prohibits unconditional access to the content, it is determined whether or not an exception to the copy control rules exists, and if an exception to the copy control rules exists, the content is conditionally accessed. Additional watermark messages can be extracted while the content is being conditionally accessed, and based on the additionally extracted watermark messages, it is verified that conditional access to the content has been fulfilled.

摘要翻译： 方法，设备和计算机程序产品促进对嵌入水印的内容的条件访问。 对于这样的内容，当与嵌入的水印消息相关联的复制控制规则禁止对内容的无条件访问时，确定是否存在复制控制规则的异常，并且如果存在复制控制规则的异常，则内容 有条件地访问。 可以在有条件地访问内容的同时提取额外的水印消息，并且基于附加提取的水印消息，验证对内容的条件访问已经被满足。

公开(公告)号：US08923548B2

公开(公告)日：2014-12-30

申请号：US13288945

申请日：2011-11-03

申请人： Rade Petrovic ,  Venkatraman Atti

发明人： Rade Petrovic ,  Venkatraman Atti

IPC分类号： G06K9/00 ,  G06K9/62 ,  G06K9/68 ,  G06T1/00

CPC分类号： G06K9/6206 ,  G06K9/6255 ,  G06K9/6807 ,  G06T1/0071 ,  G06T2201/0065

摘要： Methods, devices and computer program products facilitate the extraction of embedded watermarks in the presence of content distortions. Distortion of the content is estimated using two or more detected watermarks with an associated probability of false detection that is above a desired level. The estimated content distortion is used to obtain pre-distorted synchronization templates and to reevaluate the detected watermarks. The use of pre-distorted synchronization templates results in obtaining better estimations of content distortion, and improved reliability of watermark detections.

摘要翻译： 方法，设备和计算机程序产品有助于在存在内容失真的情况下提取嵌入的水印。 使用具有高于期望水平的相关联的错误检测概率的两个或更多个检测到的水印估计内容的失真。 使用估计的内容失真来获得预失真的同步模板并重新评估检测到的水印。 使用预失真的同步模板可以获得更好的内容失真估计，并提高水印检测的可靠性。

公开(公告)号：US08781967B2

公开(公告)日：2014-07-15

申请号：US11482519

申请日：2006-07-07

申请人： Babak Tehranchi ,  Rade Petrovic

发明人： Babak Tehranchi ,  Rade Petrovic

IPC分类号： G06F21/00

CPC分类号： G06T1/0035 ,  G06T2201/0053 ,  H04N1/32149 ,  H04N1/32272 ,  H04N7/1675 ,  H04N21/2347 ,  H04N21/4405 ,  H04N21/8358

摘要： Methods, apparatus and systems for embedding auxiliary information in encrypted host signals are provided. The present invention enables secure application of digital watermarks at any point in the transmission and/or distribution of digital content by enabling the insertion of a plurality of digital watermarks, without the knowledge of the encryption/decryption keys, into a digital host content that has been encrypted with an encryption key. The embedded watermarks persist throughout the content subsequent to the decryption of the content. The disclosed techniques are applicable to content that has been encrypted using a variety of different encryption techniques and algorithms, including stream ciphers, block ciphers, symmetric and asymmetric encryption algorithms. These methods are further adapted to enable the insertion of watermarks into a content that is compressed prior to encryption.

摘要翻译： 提供了用于在加密的主机信号中嵌入辅助信息的方法，装置和系统。 本发明能够在数字内容的传输和/或分发中的任何点上安全地应用数字水印，方法是在不知道加密/解密密钥的情况下，将多个数字水印插入到具有 用加密密钥加密。 在解密内容之后，嵌入的水印在整个内容中持续存在。 所公开的技术适用于已经使用各种不同的加密技术和算法进行加密的内容，包括流密码，分组密码，对称和非对称加密算法。 这些方法还适用于使水印插入到在加密之前被压缩的内容中。

公开(公告)号：US08615104B2

公开(公告)日：2013-12-24

申请号：US13288937

申请日：2011-11-03

申请人： Rade Petrovic ,  Venkatraman Atti

发明人： Rade Petrovic ,  Venkatraman Atti

IPC分类号： G06K9/00

CPC分类号： G06T1/0085 ,  G06T2201/0601 ,  H04L2209/608

摘要： Methods, devices and computer program products facilitate the extraction of embedded watermarks in the presence of content distortions. Pre-distorted synchronization templates are used to detect synchronization portions of embedded watermark frames. A pre-distorted synchronization template that best matches the synchronization portion of the embedded watermark frame produces an estimation of one or more distortions that are present in the content. The remainder of watermark frame can be evaluated based on the outcome of the comparison.

摘要翻译： 方法，设备和计算机程序产品有助于在存在内容失真的情况下提取嵌入的水印。 预失真同步模板用于检测嵌入水印帧的同步部分。 与嵌入的水印帧的同步部分最佳匹配的预失真同步模板产生对内容中存在的一个或多个失真的估计。 可以基于比较的结果来评估其余的水印帧。

公开(公告)号：US20130132727A1

公开(公告)日：2013-05-23

申请号：US13304097

申请日：2011-11-23

申请人： Rade Petrovic

发明人： Rade Petrovic

IPC分类号： H04L9/32 ,  G06F17/30 ,  G06F7/04

CPC分类号： G06F21/10 ,  G06F17/30858 ,  H04L9/3236 ,  H04L9/3281 ,  H04L63/08 ,  H04L2209/608 ,  H04N21/4627 ,  H04N21/8358

摘要： Content screening operations are facilitated in devices that receive a content that is subject to screening obligations. When such a content is received at a device, a watermark extraction record is obtained and accessed to fulfil content screening obligations. Upon the receipt of such an extraction record, verification of the received extraction record is carried out based on a verification rate. If the verification is successful for an extraction record with permissive information, the verification rate is decreased, thereby reducing the processing load of the device. If the verification is unsuccessful, the verification rate is increased, which can adversely affect the processing load of the device.

摘要翻译： 在接收到受到筛选义务的内容的设备中，内容筛选操作便于实现。 当在设备上接收到这样的内容时，获得并访问水印提取记录以履行内容筛选的义务。 在接收到这样的提取记录时，基于验证率进行接收到的提取记录的验证。 如果对具有许可信息的提取记录的验证成功，则验证率降低，从而减少设备的处理负担。 如果验证不成功，则验证率增加，这可能会对设备的处理负载产生不利影响。

公开(公告)号：US20130011006A1

公开(公告)日：2013-01-10

申请号：US13602844

申请日：2012-09-04

申请人： Rade Petrovic ,  Babak Tehranchi ,  Joseph M. Winograd ,  Kanaan Jemili

发明人： Rade Petrovic ,  Babak Tehranchi ,  Joseph M. Winograd ,  Kanaan Jemili

IPC分类号： G06K9/00

CPC分类号： G06T1/005 ,  G06T1/0028 ,  G06T1/0071 ,  G06T2201/0202 ,  G09C5/00 ,  G10L19/018 ,  H04L2209/608 ,  H04N1/32203 ,  H04N1/32245 ,  H04N1/32299 ,  H04N1/32315 ,  H04N2201/3233

摘要： Methods and devices are provided to embed imperceptible watermarks into a host content and to subsequently extract embedded watermarks in a manner so as to achieve desired levels of robustness, transparency and security. For a particular host content, a first number of embedding opportunities are used to insert watermarks, which is less than a number of all embedding opportunities within the host content. Watermarks are extracted from a first number of watermark extraction opportunities, which is less than a number of all watermark extraction opportunities associated with the host content. The relationship between the first number of embedding opportunities, the first number of watermark extraction opportunities and the number of all watermark extraction opportunities is such that a circumvention attempt that overwrites watermarks at all extraction opportunities degrades perceptual quality of the host content below a desired perceptual quality level.

摘要翻译： 提供了方法和装置以将不可感知的水印嵌入到主机内容中，并随后以一种方式提取嵌入的水印，以便达到期望的稳健性，透明度和安全性。 对于特定主机内容，使用第一数量的嵌入机会来插入水印，其小于主机内容中的所有嵌入机会的数量。 从第一数量的水印提取机会中提取水印，其小于与主机内容相关联的所有水印提取机会的数量。 第一数量的嵌入机会，第一数量的水印提取机会和所有水印提取机会的数量之间的关系使得在所有提取机会上覆盖水印的规避尝试降低主机内容的感知质量低于期望的感知质量 水平。

公开(公告)号：US20120300977A1

公开(公告)日：2012-11-29

申请号：US13567792

申请日：2012-08-06

申请人： Rade Petrovic ,  Dai Yang

发明人： Rade Petrovic ,  Dai Yang

IPC分类号： G06K9/00

CPC分类号： G06T1/0021 ,  G10L19/018

摘要： Methods, devices, and computer program products enable the embedding of forensic marks in a host content that is in compressed domain. These and other features are achieved by preprocessing of a host content to provide a plurality of host content versions with different embedded watermarks that are subsequently compressed. A host content may then be efficiently marked with forensic marks in response to a request for such content. The marking process is conducted in compressed domain, thus reducing the computational burden of decompressing and re-compressing the content, and avoiding further perceptual degradation of the host content. In addition, methods, devices and computer program products are disclosed that obstruct differential analysis of such forensically marked content.

摘要翻译： 方法，设备和计算机程序产品能够将取证标记嵌入在压缩域中的主机内容中。 这些和其他特征通过主机内容的预处理来实现，以提供具有随后压缩的不同嵌入水印的多个主机内容版本。 然后可以响应于对这样的内容的请求，将主机内容有效地标记有法医标记。 标记过程在压缩域中进行，从而减少了解压缩和重新压缩内容的计算负担，并避免了主机内容进一步的感知降级。 此外，公开了妨碍对这种法定标记内容的差异分析的方法，装置和计算机程序产品。

公开(公告)号：US20120072731A1

公开(公告)日：2012-03-22

申请号：US13080605

申请日：2011-04-05

申请人： Joseph M. Winograd ,  Rade Petrovic ,  Jian Zhao

发明人： Joseph M. Winograd ,  Rade Petrovic ,  Jian Zhao

IPC分类号： G06F21/24

CPC分类号： G06F21/10 ,  G06F21/445 ,  G06F21/606 ,  G06F2221/0733 ,  G06F2221/0737 ,  G06F2221/0775 ,  G06F2221/2101 ,  G06F2221/2129 ,  G06F2221/2141 ,  G09C5/00 ,  H04L9/0897 ,  H04L9/321 ,  H04L9/3236 ,  H04L63/0281 ,  H04L63/0823 ,  H04L63/102 ,  H04L2209/608 ,  H04L2463/101 ,  H04L2463/103

摘要： Methods, devices, and computer program products facilitate the application of a content use policy based on watermarks that are embedded in a content. Watermark extraction and content screening operations, which can include the application of content usage enforcement actions, may be organized such that some or all of the operations can be conducted at different times by different devices. These operations can be conducted by one or more trusted devices that reside in a networked environment. The authenticity of various devices can be verified through the exchange of certificates that can further enable such devices to ascertain capabilities of one another. Based on the ascertained capabilities, an operational configuration for conducting watermark extraction and content screening can be determined.

摘要翻译： 方法，设备和计算机程序产品促进基于嵌入在内容中的水印的内容使用策略的应用。 可以组织可包括内容使用执行动作的应用的水印提取和内容筛选操作，使得可以通过不同的设备在不同的时间进行一些或全部操作。 这些操作可以由位于联网环境中的一个或多个受信任的设备进行。 各种设备的真实性可以通过交换证书进行验证，证书可进一步使这些设备能够确定彼此的能力。 基于确定的能力，可以确定用于进行水印提取和内容筛选的操作配置。

公开(公告)号：US20100111355A1

公开(公告)日：2010-05-06

申请号：US12567620

申请日：2009-09-25

申请人： Rade Petrovic ,  Babak Tehranchi ,  Joseph M. Winograd ,  Kanaan Jemili

发明人： Rade Petrovic ,  Babak Tehranchi ,  Joseph M. Winograd ,  Kanaan Jemili

IPC分类号： G06K9/00 ,  G10L19/00

CPC分类号： G06T1/0071 ,  G06T2201/0065 ,  G10L19/018 ,  H04L9/088 ,  H04L2209/608 ,  H04N1/32203 ,  H04N1/32245 ,  H04N1/32299 ,  H04N1/32315 ,  H04N2201/3233

摘要： Methods and apparatus for enhancing the robustness of watermark extraction from digital host content are provided. Embedded watermarks may be extracted from received digital host content in accordance with a stego key. A first watermark is extracted and a number of errors in the first extracted watermark is assessed. If the number of errors is above a first pre-determined value, at least a second watermark is extracted from the host content. A number of errors in at least the second extracted watermark is assessed. If the number of errors in at least the second extracted watermark is above a second pre-determined value, the extraction results for the extracted watermarks are combined in order to cumulatively assess the validity of the first extracted watermark and at least the second extracted watermark.

摘要翻译： 提供了从数字主机内容增强水印提取的鲁棒性的方法和装置。 可以根据隐藏密钥从接收到的数字主机内容中提取嵌入水印。 提取第一水印，并且评估第一提取水印中的多个错误。 如果错误数量高于第一预定值，则从主机内容中提取至少第二水印。 评估至少第二提取水印中的多个错误。 如果至少第二提取水印中的错误数高于第二预定值，则将所提取的水印的提取结果合并，以累积评估第一提取水印和至少第二提取水印的有效性。