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1. 发明申请

WO2007141467A1 ENCODING AND DETECTING APPARATUS 审中-公开
标题翻译：编码和检测装置
公开(公告)号：WO2007141467A1
公开(公告)日：2007-12-13
申请号：PCT/GB2007/001603
申请日：2007-05-03
申请人： SONY UNITED KINGDOM LIMITED , RUSSELL, Mark, Julian , HOOPER, Daniel, Luke
发明人： RUSSELL, Mark, Julian , HOOPER, Daniel, Luke
IPC分类号： G06T1/00
CPC分类号： G06T1/0071 , G06T1/0085
摘要： An encoding data processing apparatus generates a marked copy of a video material item by representing a payload data word as a code word and embedding the code word into a copy of the video material item. The apparatus comprises a code word generator including a pre-processor and an encryption processor. The preprocessor is operable to form a plurality of initial values, each having the same predetermined length, by representing one or more parts of the payload data word in one or more of the initial values, including a field index in each initial value and setting the remaining parts of the initial value to a predetermined value. The encryption processor is operable to receive each of the initial values and to generate an encrypted data stream from each of the initial values using a payload encryption key to provide a plurality of encrypted data streams. The combiner is operable to combine the parts of the encrypted data streams with the frames of the material item. A plurality of the initial values are arranged to include the same part of the payload data, and the value of the field index for the initial value including the same payload data is changed with respect to the other initial values. For each of the one or more initial values which represents the same payload data, the field index is arranged to have a different value. These initial values are formed from the same payload data and have the same format, with the remaining set to a predetermined value such as zero. In order to avoid the encrypted streams, which convey the same payload data producing the same encrypted data stream which is added to the material items, the field index is changed to identify each of the initial values. Thus, each of the resulting encrypted streams produced by the initial values will produce different encrypted data streams, which can thereby be more easily detected individually by correlation, even though each initial value otherwise conveys the same payload.
摘要翻译：编码数据处理装置通过将有效载荷数据字表示为代码字并将代码字嵌入到视频材料项目的副本中，生成视频材料项目的标记副本。该装置包括一个代码字生成器，它包括一个预处理器和一个加密处理器。预处理器可操作以通过以一个或多个初始值表示有效载荷数据字的一个或多个部分来形成每个具有相同预定长度的多个初始值，包括每个初始值中的场索引，并设置初始值的剩余部分为预定值。加密处理器可操作以接收每个初始值，并且使用有效载荷加密密钥从每个初始值生成加密的数据流，以提供多个加密的数据流。组合器可操作以将加密的数据流的部分与材料项的帧组合。多个初始值被布置为包括有效载荷数据的相同部分，并且包括相同有效载荷数据的初始值的字段索引的值相对于其他初始值而改变。对于表示相同有效载荷数据的一个或多个初始值中的每一个，场索引被布置成具有不同的值。这些初始值由相同的有效载荷数据形成并且具有相同的格式，其余的设置为预定值，例如零。为了避免传送相同有效载荷数据的加密流产生加到物料项上的相同加密数据流，改变了场索引以识别每个初始值。因此，由初始值产生的每个所产生的加密流将产生不同的加密数据流，从而可以通过相关性更容易地单独检测，即使每个初始值否则传达相同的有效载荷。

2. 发明申请

WO2007141471A1 ENCODING AND DETECTING APPARATUS 审中-公开
标题翻译：编码和检测装置
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
申请人： SONY UNITED KINGDOM LIMITED , RUSSELL, Mark, Julian , GILLARD, Clive, Henry , HOOPER, Daniel, Luke , MCLEAN, Ian , TAPSON, Daniel, Warren , KEATING, Stephen, Mark
发明人： RUSSELL, Mark, Julian , GILLARD, Clive, Henry , HOOPER, Daniel, Luke , MCLEAN, Ian , TAPSON, Daniel, Warren , KEATING, Stephen, Mark
IPC分类号： G06T1/00
CPC分类号： G06T1/0085 , G06T1/0071 , G06T2201/0081
摘要： 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.
摘要翻译：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。

3. 发明申请

WO2007141468A1 ENCODING AND DETECTING APPARATUS 审中-公开
标题翻译：编码和检测装置
公开(公告)号：WO2007141468A1
公开(公告)日：2007-12-13
申请号：PCT/GB2007/001605
申请日：2007-05-03
申请人： SONY UNITED KINGDOM LIMITED , KEATING, Stephen, Mark , MCLEAN, Ian , RUSSELL, Mark, Julian , HOOPER, Daniel, Luke , TAPSON, Daniel, Luke
发明人： KEATING, Stephen, Mark , MCLEAN, Ian , RUSSELL, Mark, Julian , HOOPER, Daniel, Luke , TAPSON, Daniel, Luke
IPC分类号： G06T1/00
CPC分类号： G06T1/0071 , G06T1/0085
摘要： An encoding data processing apparatus generates a marked copy of a video material item by representing a payload data word as a code word and embedding the code word into a copy of the video material item. The apparatus comprises a code word generator including a pre-processor and an encryption processor. The preprocessor is operable to divide the payload word into a plurality of parts, to form a plurality of initial values from the plurality of parts, each of the initial values being formed by adding parts of the payload data word to each initial value successively starting with the first part added to the first initial value, and adding the first and second to the second initial value so that each subsequent initial value includes all the parts of the payload data word of those of the previous initial values in addition to a new part of the payload data word. The encryption processor is operable to receive each of the initial values and to generate an encrypted data stream from each of the initial values using a payload encryption key. A combiner is operable to combine the encrypted payload data word with the video material item. The encrypted data streams are thereby provided with improved orthogonality, which can assist in the detection of each of the encrypted data streams by correlation. Furthermore, the likelihood of an attacker being able to discover, alter or destroy the payload data word in the material item is reduced.
摘要翻译：编码数据处理装置通过将有效载荷数据字表示为代码字并将代码字嵌入到视频材料项目的副本中，生成视频材料项目的标记副本。该装置包括一个代码字生成器，它包括一个预处理器和一个加密处理器。预处理器可操作以将有效载荷字划分成多个部分，以从多个部分形成多个初始值，每个初始值通过将有效载荷数据字的部分加到每个初始值上而形成，每个初始值从第一部分添加到第一初始值，并且将第一和第二添加到第二初始值，使得除了新的部分之外，每个后续初始值包括有效载荷数据字的所有部分有效载荷数据字。加密处理器可操作以接收每个初始值并且使用有效载荷加密密钥从每个初始值生成加密的数据流。组合器可操作以将加密的有效载荷数据字与视频材料项组合。因此，加密的数据流具有改进的正交性，其可以通过相关性来帮助检测每个加密的数据流。此外，减少攻击者能够发现，改变或破坏物料项目中的有效载荷数据字的可能性。

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