公开(公告)号：WO2006061601A9

公开(公告)日：2009-07-30

申请号：PCT/GB2005004682

申请日：2005-12-07

Applicant: SONY UK LTD ,  TAPSON DANIEL WARREN ,  HOOPER DANIEL LUKE

Inventor： TAPSON DANIEL WARREN ,  HOOPER DANIEL LUKE

IPC: G06T1/00

CPC classification number: H04N21/23892 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0065 ,  G06T2201/0083

Abstract: A water marked image frame for conveying a payload data word is generated by combining at least one image frame with a two-dimensional water mark pattern. Comprising a plurality of regions, each including a two dimensional water mark block selected from a predetermined set of possible water mark blocks to represent the value of the associated payload data symbol. The payload data is detected by correlating each region of the water marked image frame with each block from of the set of water marked blocks, to form for each region a set of probability surfaces, each of which is combined with a distortion probability value for each region and for each of the water mark blocks which may be present in the region thus forming for each region, for each of the possible values of the payload symbol a probability value that that region includes that symbol value and therefrom generating an estimate of the payload data.

Abstract translation: 通过将至少一个图像帧与二维水印图案组合来产生用于传送有效载荷数据字的水印图像帧。 包括多个区域，每个区域包括从预定的一组可能的水印块中选择的二维水印块，以表示相关联的有效载荷数据符号的值。 通过将水印图像帧的每个区域与该组标记水印块的每个块相关联来检测有效载荷数据，以便为每个区域形成一组概率表面，每个区域与每个区域的失真概率值 对于可能存在于区域中的每个水印块的每个水印块，对于每个区域，对于有效载荷符号的每个可能的值，该区域包括该符号值并从而生成有效载荷的估计的概率值 数据。

公开(公告)号：WO2007141471A1

公开(公告)日：2007-12-13

申请号：PCT/GB2007/001657

申请日：2007-05-04

Applicant: SONY UNITED KINGDOM LIMITED ,  RUSSELL, Mark, Julian ,  GILLARD, Clive, Henry ,  HOOPER, Daniel, Luke ,  MCLEAN, Ian ,  TAPSON, Daniel, Warren ,  KEATING, Stephen, Mark

Inventor： RUSSELL, Mark, Julian ,  GILLARD, Clive, Henry ,  HOOPER, Daniel, Luke ,  MCLEAN, Ian ,  TAPSON, Daniel, Warren ,  KEATING, Stephen, Mark

IPC: G06T1/00

CPC classification number: G06T1/0085 ,  G06T1/0071 ,  G06T2201/0081

Abstract: An encoding data processing apparatus generates a marked copy of a video material item by embedding a payload data word into the video material item. The video material item includes a plurality of video frames. The encoding data processing apparatus comprises a code word generator, a shuffle processor and an embedding data processor. The code word generator is operable to generate a water mark code word from the payload data word and to read data representing the water mark code word into a shuffle data store. The shuffle processor is operable to generate pseudo randomly at least one address within an address space of the shuffle data store for each of the video frames and to read data representing part or parts of the water mark code word out from the data store at locations identified by the pseudo randomly generated address. The data embedding processor is operable to receive the video material item and to embed the data representing the part or parts of the water mark code word read out from the shuffle data store for each frame into a corresponding frame of the video material item. As such, by randomly embedding different parts of the code word into each frame of the video material item, a likelihood of an attacker being able to identify the code word within the video material item is substantially reduced. Security of the payload data word represented by the water mark code word is therefore improved.

Abstract translation: 编码数据处理装置通过将有效载荷数据字嵌入到视频材料项目中来生成视频材料项目的标记副本。 视频材料项目包括多个视频帧。 编码数据处理装置包括码字生成器，混洗处理器和嵌入数据处理器。 代码字生成器可操作以从有效载荷数据字生成水印码字，并将表示水印码字的数据读入洗牌数据存储。 洗牌处理器可操作以在每个视频帧的随机播放数据存储器的地址空间内产生伪随机的至少一个地址，并且从标识的位置读取表示水印码字的部分或部分的数据。 由伪随机生成的地址。 数据嵌入处理器可操作以接收视频材料项目并将表示从每个帧的混洗数据存储器读出的水印码字的部分或部分的数据嵌入到视频材料项目的相应帧中。 这样，通过将代码字的不同部分随机地嵌入到视频材料项目的每个帧中，攻击者能够识别视频材料项目内的代码字的可能性大大降低。 因此，提高了由水印码字表示的有效载荷数据字的安全性。

公开(公告)号：WO2006061601A1

公开(公告)日：2006-06-15

申请号：PCT/GB2005/004682

申请日：2005-12-07

Applicant: SONY UNITED KINGDOM LIMITED ,  TAPSON, Daniel, Warren ,  HOOPER, Daniel, Luke

Inventor： TAPSON, Daniel, Warren ,  HOOPER, Daniel, Luke

IPC: G06T1/00

CPC classification number: H04N21/23892 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0065 ,  G06T2201/0083

Abstract: A water marked image frame for conveying a payload data word is generated by combining at least one image frame with a two-dimensional water mark pattern. Comprising a plurality of regions, each including a two dimensional water mark block selected from a predetermined set of possible water mark blocks to represent the value of the associated payload data symbol. The payload data is detected by correlating each region of the water marked image frame with each block from of the set of water marked blocks, to form for each region a set of probability surfaces, each of which is combined with a distortion probability value for each region and for each of the water mark blocks which may be present in the region thus forming for each region, for each of the possible values of the payload symbol a probability value that that region includes that symbol value and therefrom generating an estimate of the payload data.

Abstract translation: 通过将至少一个图像帧与二维水印图案组合来生成用于传送有效载荷数据字的水印图像帧。 包括多个区域，每个区域包括从预定的一组可能的水印块中选择的二维水印块，以表示相关联的有效载荷数据符号的值。 通过将水印图像帧的每个区域与该组标记水印块的每个块相关联来检测有效载荷数据，以便为每个区域形成一组概率表面，每个区域与每个区域的失真概率值 对于可能存在于区域中的每个水印块的每个水印块，对于每个区域，对于有效载荷符号的每个可能的值，该区域包括该符号值并从而生成有效载荷的估计的概率值 数据。

公开(公告)号：WO2006061597A1

公开(公告)日：2006-06-15

申请号：PCT/GB2005/004677

申请日：2005-12-06

Applicant: SONY UNITED KINGDOM LIMITED ,  TAPSON, Daniel, Warren ,  HOOPER, Daniel, Luke

Inventor： TAPSON, Daniel, Warren ,  HOOPER, Daniel, Luke

IPC: G06T1/00

CPC classification number: G06T1/005 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0065 ,  G06T2201/0083

Abstract: A data processing apparatus registers an image which has been encoded with a two-dimensional water mark pattern. The water mark comprises for each frame of the image a water mark frame pattern of water mark blocks, the water mark pattern comprising a plurality of regions. Each region of the pattern includes one water mark block selected from a predetermined set of possible water mark blocks in accordance with a key sequence. The key sequence provides a predetermined sequence of selected water mark blocks to form the water mark pattern of each frame to provide a predetermined sequence of water marked frames. The data processing apparatus comprises a block match processor operable to generate block match probabilities comprising for each region of a current frame of the water marked image a probability surface of possible distortion vectors for each possible water mark block of the set of possible water marked blocks which may have been added to that region of the image frame. A water mark block prior probability calculator operable to form block prior probabilities, a distortion probability calculator operable to form a spatial prior probability surface for each region of the current image frame from the block prior probabilities and the block match probabilities, providing a probability distribution of distortion vectors for the region, and a mark of distortion processor operable to form an estimate of a distortion vector for each region from the adapted spatial prior probabilities. Accordingly, distortion in a water marked image can be detected and then removed with out a need to refer to an original copy of the image.

Abstract translation: 数据处理装置对已经用二维水印图案编码的图像进行登记。 水印包括图像的每个帧的水印块的水印框图案，水印图案包括多个区域。 图案的每个区域包括根据键序列从预定的一组可能的水印块中选择的一个水印块。 密钥序列提供所选择的水印块的预定序列以形成每个帧的水印图案，以提供预定的水标记序列。 数据处理装置包括块匹配处理器，其可操作以产生块匹配概率，其包括针对水印图像的当前帧的每个区域的可能的水标记块集合中的每个可能的水印块的可能失真向量的概率表面， 可能已经被添加到图像帧的该区域。 水印块先验概率计算器可操作以形成块先验概率，失真概率计算器可操作以从块先验概率和块匹配概率形成当前图像帧的每个区域的空间先验概率表面，提供块概率分布 用于该区域的失真向量，以及可用于从适应的空间先验概率形成每个区域的失真向量的估计的失真处理器的标记。 因此，可以检测水印图像中的变形，然后除去需要参考图像的原始副本的方式去除。