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    • 14. 发明公开
    • Data processing apparatus and method
    • Datenverarbeitungsgerätund -verfahren
    • EP1394736A2
    • 2004-03-03
    • EP03253663.3
    • 2003-06-10
    • Sony United Kingdom Limited
    • Tapson, Daniel Warren
    • G06T1/00
    • H04N1/32154G06T1/005G06T2201/0052G06T2201/0063G06T2201/0065G06T2201/0081H04N1/32165H04N1/3217H04N1/32277H04N2201/3235H04N2201/327
    • A detecting data processing apparatus determines whether one or more code words of a predetermined set of code words are present in a suspected version of a material item. The apparatus comprises a registration processor operable to associate samples of the suspected version with samples of a copy of the original material item, a recovery processor and a detection processor. The recovery processor is operable to generate a recovered code word by comparing the registered copy of the original and the suspect material items. The detection processor is operable to detect one or more code words from a correlation between the recovered code word and the code words from the set. The registration processor is operable to form at least one reduced-bandwidth-version of the material item and to associate the suspected version and the copy of the material item in accordance with a comparison between the reduced-bandwidth-versions of the suspected version and the original material item.
      The registration of the suspected version and the original version of the material item is typically required in order to improve a likelihood of correctly recovering a code word from the suspected version. For material items such as video recordings of motion picture films, a substantial number of samples may need to be associated in order to effect the registration process. As a result, the registration process may be time consuming or at least computationally difficult. However, by forming reduced-bandwidth-versions of the suspected version and the original version of the material items, a corresponding reduction in the time taken to perform the registration process is provide in accordance with the bandwidth reduction.
    • 检测数据处理装置确定在材料项目的可疑版本中是否存在预定的一组代码字的一个或多个代码字。 该装置包括一个登记处理器,可操作以将可怀疑版本的样本与原始物品的副本,恢复处理器和检测处理器的样本相关联。 恢复处理器可操作以通过比较原始文件和可疑材料项目的注册副本来生成恢复的代码字。 检测处理器可操作以从恢复的码字和来自该组的码字之间的相关性来检测一个或多个码字。 注册处理器可操作以形成材料项目的至少一个减少带宽版本,并且根据可疑版本的减少带宽版本与可疑版本的缩减带宽版本之间的比较来关联可疑版本和材料项目的副本 原料项目。 通常需要注册疑似版本和原始版本的材料项目,以便提高从可疑版本正确恢复代码字的可能性。 对于诸如电影胶片的视频记录等物品,可能需要关联大量的样本以实现注册过程。 结果,注册过程可能是耗时的或者至少是计算上困难的。 然而,通过形成可疑版本的减少带宽版本和原始版本的材料项目,根据带宽减少提供执行注册过程所花费的时间的相应减少。
    • 17. 发明公开
    • Data processing apparatus and method
    • 数据处理装置和方法
    • EP1324262A2
    • 2003-07-02
    • EP02258552.5
    • 2002-12-11
    • SONY UNITED KINGDOM LIMITED
    • Pelly, Jason CharlesTapson, Daniel Warren
    • G06T1/00
    • H04N1/32154G06T1/005G06T2201/0052G06T2201/0063H04N1/32165H04N2201/324H04N2201/327
    • A watermarking system comprises an encoding data processor operable to generate at least one marked version of an original item of material by introducing one of a predetermined set of code words into a copy of the original material item. The code words are generated from a pseudo-random number generator initialised with a seed value. The seed value is used to identify the marked material item, from the code word produced from the seed value. The watermarking system also includes a detecting data processor operable to identify a particular marked copy of the material item by recovering a code word from the marked material item and correlating all code words in the set of code words with the recovered code word. The detecting data processing apparatus also includes a registration processor operable to associate samples of the original material item with corresponding samples of the marked material item to which corresponding code word coefficients may have been added. By registering the original material item with the marked material item, a likelihood of correctly identifying the version of the marked material item is improved, reducing a false negative detection probability.
    • 一种水印系统包括编码数据处理器,可操作用于通过将预定的一组码字中的一个码字引入原始素材项目的副本中来生成原始素材项目的至少一个标记版本。 码字是从用种子值初始化的伪随机数生成器生成的。 种子值用于从根据种子值生成的代码字中识别标记的材料项目。 该水印系统还包括检测数据处理器,该检测数据处理器可操作用于通过从被标记的材料项目中恢复出码字并且将该组码字中的所有码字与恢复的码字相关来识别该物质项目的特定被标记副本。 检测数据处理设备还包括注册处理器,该注册处理器可操作以将原始材料项目的样本与可能已添加有相应码字系数的标记材料项目的对应样本相关联。 通过注册带有标记的物料项目的原始物料项目,正确识别标记的物料项目的版本的可能性得到改善,从而减少了错误的否定检测概率。